Method and pipeline for transfer of signals
SUBSTANCE: invention is related to the field of electrical engineering, in particular, to borehole telemetering systems for transfer of signals between surface device and borehole instrument installed in borehole. Wired drill pipe is suggested for drilling stem of borehole instrument installed in borehole that penetrates geological layer. Wired drill pipe includes drill pipe, cable and wire holder. Drill pipe is provided with slot in its end. Slots are able to receive at least one transformer. Drill pipe has internal surface that forms channel for flow of borehole mud through it. Cable passes from transformer into channel of drill pipe. Wire holder is located on internal surface of drill pipe. Wire holder is intended for cable fixation in it.
EFFECT: reduction of probability of electric faults and/or failures because of proper contact between neighbouring pipes.
37 cl, 51 dwg
The prior art inventions
This application claims priority based on provisional application U.S. No. 60/749546, filed December 12, 2005 and entitled "Method and Conduit for Transmitting Signals."
1. The technical field to which the invention relates
The present invention relates to telemetry systems for use in downhole operations. In particular, the present invention relates to downhole telemetry systems, such as telemetry, wired drill pipe, for transmitting signals between the ground device and the downhole device, placed in a wellbore penetrating a geological formation.
2. Prior art
Wells are drilled for exploration and production of hydrocarbons. Downhole drilling tool with a chisel on the end deep into the earth to form the wellbore. Advancing the drilling tool drilling mud is pumped from the ground of the barn for drilling mud through the drilling tool and exits the drill bit to cool the drilling tool and remove debris. The fluid exits the drill bit and flows up to the surface for recirculation through the tool. Drilling mud is also used for the formation of a mud cake for lining the wellbore.
During drilling operations it is desirable obespechivaetsya between the surface and the downhole device. Downhole telemetry devices are commonly used for software distribution, for example, power, commands, and/or communication signals between the ground device and the downhole device. These signals are used to control the operation and/or zapisywania downhole tool and transmission of downhole information to the surface.
We developed several different types of telemetry systems for transmitting signals between the ground device and the downhole device. For example, the telemetry system on the basis of the pressure pulses in drilling fluid use changes in the flow of the drilling fluid coming from the barn to the drilling fluid in the downhole tool and back to the surface, for transmitting the decoded signals. Examples of such telemetry devices on the basis of the pressure pulses in the drilling fluid is described in U.S. patent No. 5375098 and 5517464. In addition to the downhole telemetry systems on the basis of the pressure pulses in the mud, to establish the desired communication tools you can use other downhole telemetry system. Examples of such systems may include a downhole telemetry system of drill pipe are described in U.S. patent No. 6641434, electromagnetic borehole telemetry system described in U.S. patent No. 5624051, acoustic borehole telemetry system is to him, described in patent application PCT No. WO2004085796. Other devices or data communication, for example, the transceivers connected to the sensors, are also used for transmitting power and/or data. Depending on the conditions in the well bore, speeds and/or other factors, it may be preferable to use certain types of telemetry for certain operations.
In particular, telemetry drill pipe is used to provide wired communication line between the ground device and the downhole device. The idea of laying wire on the interconnected sections of drill pipe are proposed, for example, in U.S. patent No. 4126848 Denison; U.S. patent No. 3957118 Barry and others; and in U.S. patent No. 3807502 of Heilhecker and others; and in publications, such as "Four Different Systems Used for MWD", W. J. McDonald, The Oil and Gas Journal, pages 115-124, April 3, 1978, a Number of later patents and publications devoted to the use of inductive connectors with galvanic connection in the wired drill pipe (WDP), described, for example, in U.S. patents№№ 4605268; 21405375,052,941; 4806928; 4901,069; 5531592; 5278550; 5971072; 6866306 and 6641434; published patent application of the Russian Federation No. 2040691; and PCT application no WO 90/14497. A number of other patent references disclose or suggest specific solutions for data transmission along the axial lengths of well tubing or pipe sections, for example, the patent is/application U.S. No. 2000716; 2096359; 4095865; 472402; 4953636; 6392317; 6799632 and US 2004/0119607; and PCT application no WO 2004/033847 and WO 0206716. Some methods include placing the wires in the pipe and placing them in the drill collar, as shown, for example, in U.S. patent No. 4126848.
Despite these advantages in technology, telemetry, wired drill pipe, there remains a need to provide a reliable telemetry system. It is desirable that such a system would provide methods to protect electrical components. It is also desirable that such a system was simple in manufacturing, mechanical processing and/or modification. Such a system preferably has, inter alia, one or more features of: reducing the likelihood of electrical malfunctions and/or failures, good contact between adjacent tubes, redundant components, and/or redundant system.
Some of the terms defined in this description, because they are used for the first time, while some other terms used in this description are defined below.
"Communication" means capable of, to induce, transfer or otherwise transfer the signal.
"Communication connector" means a device or structure that serves to connect the respective ends of two adjacent tubular parts, such as covering the end /presence covers the second end of the adjacent pipe sections, through which you can pass a signal.
"Communication" refers to communication connected tubular parts, for example, in interconnected sections WDP for transmitting signals over a distance.
"Telemetry system" means at least one communication line plus other components, such as ground-based computer, tools, MWD/LWD, adapter for connection, and/or routers that are necessary to measure, transmit, and display/recording data received from the wellbore or through it.
"Wire communication" means a channel that is at least partially wired along or over a section of the WDP for transmitting signals.
"Wired drill pipe" or "WDP" means one or more tubular parts, including drill pipe, drill collars, casing, tubing column and other pipelines, which are intended for use in a drill string, each of the tubular part includes a wire communication line. Wired drill pipe may contain a hidden column or liner and may extend, among other changes.
The essence inventedOia
The present invention relates to a wired drill pipe to the drill string downhole tool located in a wellbore penetrating the geological the cue layer. Wired drill pipe includes drill pipe, cable and wire holder. Drill pipe has a slot on each end. Slots capable of receiving at least one transformer. Drill pipe has an inner surface forming a channel through which flows the drilling fluid. The cable passes from the transformer in the channel of the drill pipe. The conductor holder is located on the inner surface of the drill pipe. Cable bracket designed for mounting cable inside.
Brief description of drawings
In order to thoroughly understand the above features and advantages of the present invention, a more detailed description of the invention briefly described above are variations in its implementation, which is illustrated in the accompanying drawings. Note, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not intended to limit its scope, as the invention allows for other, equally effective ways of implementation.
Figure 1 - scheme of the drilling site, which includes a drilling rig in which the downhole tool is immersed her into the wellbore through the drill string, a drill string having a set of wired drill pipe forming elemetrics system of the drill string.
Figure 2 is a view in the context of multiple wired drill pipe, carrying a wired pipe.
Figure 3 is a partially disassembled perspective view of the docking communicative pair of connectors in accordance with a wired pipe, shown in figure 2.
4 is a detailed view in section connecting the pair of communication connectors, shown in Figure 3, bound to each other as part of the column working pipeline.
Figa - pipeline similar to the one shown in figure 2, but using an expandable tubular sleeve for securing one or more conductive wires between communication connector pair.
Figw - pipe similar to that shown Figa, except that conductive(e) conductor(s) is(Yat) through the pipe in a spiral.
Figa-6D - different tools pre-forming an expandable sleeve, shown in Figure 5, for pre-placement section of the sleeve to initiate its expansion under the action of the internal pressure of the fluid, for example through hydroforming.
7 - explosives stockpiled in an expandable tubular sleeve such as that shown in Figure 5 for the expansion of the sleeve under the action of detonation.
Figa - view in section of the pipeline, shown in figure 5, but using an elongated pillow owls is local with an expandable tubular sleeve for securing one or more conductive wires.
FIGU is a perspective view of the pipe shown in Figa, after expansion of the expandable tubular sleeve with the clutch with a long cushion and the inner wall of the pipeline.
Figa is a view in transverse section of the pipeline, shown in Figa in which alternative U-shaped expandable tubular sleeve is also shown by dashed lines.
Figw - detailed view in cross section of the pipeline, shown in Figv, in which the sleeve is expanded to grip the elongated cushion and the inner wall of the pipeline.
Figa - pipeline similar to the one shown in Figure 5, but using welded, canavate elongated cushion for mounting one or more conductive wires.
FIGU is a view in transverse section of the pipeline, shown in Figa, taken along the section line 10B-10B in Figa.
Figa - expandable tubular sleeve provided with axially oriented slits to facilitate its expansion.
Figw - sleeve, shown in Figa, after its extension.
Figs - pot, used for mechanical expansion of the sleeve shown in Figa.
Fig - detailed view in cross section similar to that shown Figv, but in which the elongated cushion is used regardless of the expandable tubular sleeve, and attached to the inner wall of the line the moment.
Figa-B - species cross section of an alternative expandable tubular sleeve, the respective compressed and expanded States, used for fastening the elongated cushion.
Figa is a view in transverse section of the pipeline, using the groove in its inner wall for mounting one or more conductive wires.
Figw - canavati pipeline, shown in Figa, provided with a cover plate.
Fig is a view in transverse section of the pipeline, using the groove on its outer wall and the outer hidden column for mounting one or more conductive wires.
Figa and 16B - detailed views of a pipe section having a wire holder in neformalnom and molded positions, respectively, and the conductor holder is the pillow.
Figa and 17B - detailed views of the site, with conductor holder in neformalnom and molded positions, respectively, and the conductor holder is a pillow with a groove.
Figa - detailed view of a pipe section having a wire holder, and the holder of the wire is a metal strip.
FIGU is a detailed view of the pipe section with the bracket, and the bracket is metal pillow.
Figa - view in longitudinal section of the pipeline that shows the keyway for the reception of conductor holder.
Figw - detailed view in section of the pipeline, shown in Figa, taken along the line 19B1-19B1 and depicting the keyway.
Figw - detailed view in section of the pipeline, having an alternative the keyway.
Figs - detailed view in section of the pipeline, shown in Figa, taken along the line 19C-19C.
Figa - view in longitudinal section of the pipeline representing the keyway for the reception of conductor holder and the sleeve.
Figw - detailed view in section of the pipeline, shown in Figa, taken along the line 20B1-20B1 and depicting the keyway.
Figw - detailed view in section of the pipeline without feather key groove.
Figs - detailed view in section of the pipeline, shown in Figa, taken on line 20C-20C.
Figa diagram of a wired communication line in accordance with the piping shown in figure 2-4.
Figv diagram of a pair of independent conductive lines used in the pipeline.
Figa-D - detailed views of the pipeline, in which the transformer is fixed, the holder of a transformer using different configurations of the slot.
Figa-D - detailed views of the pipeline, in which the transformer is fixed so that its end may be subjected to mechanical processing.
Fig - detailed view of adjacent sections of the WDP with a gasket between the at them.
Detailed description of the invention
Figure 1 shows a conventional drilling rig and drill string, which can be advantageous to use the present invention. According to Figure 1, the platform and derrick Assembly 10 is located above the wellbore 11 penetrating a geological formation F. the Drill string 12 is suspended within the borehole 11 and includes a drill bit 15 and its lower end. Drill string 12 is rotated by the drilling rotor 16, it's powered by means not shown, which actuates a leading drill pipe 17 at the upper end of the drill string. Drill string 12 is suspended on the hook 18 attached to a traveling block (not shown), through the leading drill pipe 17 and the swivel 19, which allows the drill string to rotate relative to the hook.
The drilling fluid 26 is stored in the barn 27 formed at the well site. Mud pump 29 delivers the drilling fluid 26 to the inside of the drill string 12 via a channel (not numbered) in the swivel 19, causing the drilling fluid flows down the drill string 12 as indicated by the arrow 9. Then the drilling fluid exits the drill string 12 via channels in the drill bit 15, and then circulates upward in the region between the outer wall of the drill string and the wall of the wellbore, the so-called annular space, as casanostra 32. Thus, the drilling fluid lubricates the drill bit 15 and moves the rock fragments on the surface when the drilling fluid is returned to the barn 27 for cleaning and recycling.
Drill string 12 also includes equipment of the bottom of the drill string (BHA) 20 placed near the drill bit 15. BHA 20 may include means for measuring, processing and maintaining information, and for communication with the surface (for example, with devices MWD/LWD). An example of a communication device that can be used in the BHA, described in detail in U.S. patent No. 5339037.
The communication signal from the BHA may be taken on the surface of the transducer 31, which is connected to ground receiving subsystem 90. The output signal of the receiving subsystem 90 is supplied to the CPU 85 and the device 45 record. Ground the system may also include transmitting system 95 for communication with downhole tools. The line of communication between the downhole tools and surface system may contain, among other things, the telemetry system 100 of the drill string, which contains the set of sections 210 wired drill pipe (WDP).
Drill string 12 can alternatively use the configuration of the top drive (also known), in which the drill string rotates the power swivel, and not the leading section of drill pipe and drill rotor. Specialists in D. the authorized area obviously "moving" the drilling operations can alternatively be performed with well-known downhole turbine motor type Manu, which converts the hydraulic energy of the drilling fluid 26 is pumped from a barn 27 for drilling mud down the drill string 12 in the torque to rotate the drill bit. In addition, the drilling can be performed using the so-called "rotationally-driven" systems known from the prior art. Various aspects of the present invention provide for the use of each of these configurations drilling and are not limited to traditional rotary drilling operations.
Drill string 12 uses wired telemetry system in which several sections 210 WDP are interconnected in the drill string with the formation of the communication line (not numbered). One type of section WDP, disclosed in U.S. patent No. 6641434 Boyle and others, and assigned to the holder of the present invention, the entire contents of which is incorporated by reference, uses a communication connectors, in particular, inductive connectors for transmitting signals in sections WDP. Inductive connector in sections WDP, according to Boyle and others, contains a transformer which has a toroidal core made of a material with high permeability and low loss, the example, supermalloy (which is an alloy of Nickel and iron, machined to extremely high initial permeability and is suitable for use in transformers, low-level signals). Winding, consisting of multiple turns of insulated wire wound on a toroidal core with the formation of a toroidal transformer. In one configuration of a toroidal transformer is sealed in a rubber or other insulating materials, and the transformer Assembly fitted into the groove in the connection drill pipe.
Figure 2-4 shows the section of the drill string 12, as shown in figure 1, shows a section 210 wired drill pipe (WDP), adjacent to the sections WDP 9a and 9b. It is shown that section WDP 210 is communication connectors 221, 231, in particular, the inductive coupling elements at or near its respective end 241, covering the end 222 and end 234, a covered end 232. The first cable 214 passes through the pipe 213 for communicative connection of the connectors 221, 231 method, further described below.
Section WDP 210 provided with an elongated tubular body 211 having an axial channel 212 covering the end 222 covered end 232 and the first cable 214, going from covering the end 222 to the covered end 232. The first element 221 inductive coupling with the loop current (e.g. the measures toroidal transformer) and a similar second element 231 inductive coupling with the loop current is placed on covering the end 222 and covered the end 232, respectively.
The first element 221 inductive coupling with the loop current, the second element 231 inductive coupling with the loop current and the first cable 214 together to provide a communication pipeline for the length of each section of the WDP. It is shown that the inductive connector (or communicative connection) 220 on the associated interface between the two sections WDP established the first element 221 inductive coupling of the sections WDP 210 and the second element 231' inductive coupling with a loop current of the next tubular parts, which can be another section of the WDP. Specialists in this field it is obvious that in some embodiments, implementation of the present invention, the inductive coupling elements can be replaced by other communication connectors that perform similar communicative function, such as direct connection with the electrical contact like disclosed in U.S. patent No. 4126848 Denison.
Figure 4 depicts an inductive connector or communicative connection 220, shown in figure 3. Covering the end 222 includes internal threads 223 and the inner annular contact flange 224 having a first slot 225, at which time ewenny first toroidal transformer 226. Toroidal transformer 226 is connected to the cable 214. Similarly, the covered end 232' adjacent conductive tubular parts (for example, another section WDP) includes an external thread 233' and the inner annular contact the tubular end 234'having a second slot 235', which placed second toroidal transformer 236'. The second toroidal transformer 236' is connected to the second cable 214' adjacent tubular parts 9a. According to Figure 2 covered end 232' has an external contact flange 251', which is in contact with the end 241 of the outer end 222.
The slots 225 and 235' may be coated with a material with high electrical conductivity and low permeability (e.g., copper) to improve the efficiency of the inductive coupling. When covering the end of one section 222 WDP is connected with the covered end 232' adjacent tubular parts (for example, another section WDP), formed communicative connection. Figure 4 shows a sectional plot of the resulting interface, in which the connecting pair of inductive coupling elements (i.e. toroidal transformers 226, 236') connected together for forming a communication connection in a production line. This view in the context also shows that the closed toroidal path 240 and 240' cover toroidal transformers 226 and 236', respectively, and that the pipes 23 and 213' form channels for internal electrical cables 214 and 214', connecting two inductive coupling element, placed at the two ends of each section WDP.
The above inductive connectors include an electrical connector made in the form of a double doughnut. Doctoronline connector uses an internal shoulder covered and covering the ends as electrical contacts. The inner flange are brought into contact under pressure from the outside, when covered and covering the ends over, which ensures the electrical connection between covered and covering the ends. Currents are induced in the metal connection through toroidal transformers placed in the slots. On a given frequency (for example, 100 kHz), these currents are held on the surface of the slots due to the skin effect. Covered and covering the ends form a secondary circuit of the respective transformers, and two secondary circuits form a direct connection through the pair of inner surfaces of the ribs.
Although figure 2-4 shows specific types of communicative connector, specialists in this field it is obvious that for signal transmission through the interconnected tubular parts you can use different connectors. For example, such systems may include magnetic connectors, for example, described in international the Noah patent application no WO 02/06716 Hall and other You can also offer other systems and/or connectors.
On Figa-21B shows the various options for implementation of conductor holder for mounting and protecting conductive wire or cable, for example, electrical cable 214 and/or 214', shown in Fig.2-4, in section WDP or pipeline. On Figa shows the pipeline 510, a similar section of the WDP, shown in figure 2. Accordingly, the pipe 510 is formed by a tubular body 502 equipped with a pair of communication connectors 521, 531 (which may be similar to the connectors 221 and 231, as shown in figure 2-4) on or near the corresponding covering, and covered the ends 522, 532 of the tubular body.
The pipeline is designed for use in a borehole, such as steel drill pipe typically consists of a straight section of pipe (see tubular body 502) with the bottom covered by the connection (see covered end 532) and the upper cover connection (see covering the end 522). In the case of standard drill pipe, inner diameter (VD), preferably, varies so that the lowest VD lies on the terminal connections (see VD1), and the highest VD lies along srednesetevogo section of the tube housing (see VD2). Typical of the difference between the VD terminal connection and VD casing pipes range from 0.5 to 0.75 inches, but in some cases can be a pain the neck (for example, of 1.25 inches or more). However, it should be understood that other downhole piping (even some of the drill pipe) do not have such a tapered internal Affairs, but use a constant VD for end fittings and the body. One example of a drill pipe with a constant VD is drill pipe HiTorque™ from Grant Prideco. The present invention is applicable to downhole pipelines with numerous configuration (variable or constant) VD.
Communication connectors 521, 531 may be an inductive coupling elements, each of which includes a toroidal transformer (not shown), and connected by one or more conductive wires 514 (referred to here simply as "cable") for transmitting signals between them. The ends of the cable are usually laid through the "upset" the ends of the pipe through the hole, "gun drill" or machined grooves in each of the upset ends, and reach, for example, the respective toroidal transformers. Thus, the communication connectors 521, 531 and cable 514 together to provide a line of communication along each pipeline 510 (e.g., along each section WDP).
Preferably, the pipe 510 is able to strengthen and protect the conductive wire or a pair of conductive wires (also known as conductors), n is the sample cable 514, that goes from one end of the pipe section to another. If there is only one conductive wire, the pipeline itself may act as the second conductor to complete the circuit. Commonly used configuration of the at least two conductive wires, such as twisted pair wires or coaxial cable. At least one of the conductors is typically electrically isolated from the other(s) conductor(s). In some circumstances, it may be desirable to use more than two conductors for redundancy or for other purposes. Examples of such redundant wiring is described below with reference to Figa-B.
According Figa conductor(s) secured and protected extensible tubular sleeve 550, shown placed (and advanced) in the tubular body 502. The sleeve 550 is designed so that it will fit in the unexpanded state in the area of the smallest diameter VD1pipe 510. Thus, for example, an expandable tubular sleeve 550 may initially have a cylindrical shape and have an outer diameter (OD), which is slightly less than the internal Affairs of the pipeline at the site VD1. Obviously, an expandable tubular sleeve is not required initially to be cylindrical, and can be advantageous to use different configuration (for example, U-shaped, as described below).
In particular the s versions of the implementation, an expandable tubular sleeve has a plot which is pre-placed to initiate its expansion under the action of internal pressure of a fluid, such as gas pressure or fluid, and, in particular, through hydroforming (described below). When the sleeve is, for example, the sleeve 550 is placed in the pipe 510, the cable 514 is connected between the communication connectors 521, 531 to establish a wired communication line, runs along the tubular body 502 of the pipeline between the inner wall of the tubular body, and (unexpanded tubular sleeve 550. Tubular sleeve 550 is then expanded in a tubular housing 502 under the action of pressure fluid on the inner wall of the tubular sleeve and the extension is initiated at a predetermined location (e.g., at or near the center of the body 502). As a result of such extension cable 514 is secured between the tubular body 502 and a tubular sleeve 550.
According Figa cable 514 passes linearly along the length of the tubular body 502 of the pipeline. However, according Figv, cable 514 may be placed in the pipe 510 in any configuration, for example in a spiral, as shown. According additionally described herein, the wire can be fastened in place using a variety of methods. Examples of such methods hydroforming, welding, bonding and/or other fastening cable is and the location shown on Figa-22B.
On Figa-6D shows the various tools pre-forming (i.e. molding before placing the tubular sleeve in a tubular casing pipe) expandable sleeve like sleeve 550, shown in Figure 5, for pre-placement section of the sleeve to initiate its expansion under the action of the internal pressure of the fluid. Pre-placed plot tubular sleeve may be pre-molded localized application of mechanical force to the inner wall of the tubular sleeve (see extended annular section 652 of the sleeve 650 on Figa); localized application of mechanical force to the outer wall of the tubular sleeve (see compressed annular section 652' sleeve 650' FIGU); reduction in the wall thickness of the tubular section of the sleeve (see thinned annular section 652" sleeve 650" Figs); selective amplification of the tubular sleeve (see non-amplified annular section 652'" sleeve 650"' Fig.6D); change of material properties of the tubular section of the sleeve for example, by localized heat treatment is not shown); and/or combined means.
A specific method for expanding an expandable tubular sleeve in the pipe, such as drill pipe, uses water under high pressure in a known process called hydroforming, the process of hydraulic three-dimensional is about expansion, which can be carried out at ambient temperature for fixing the sleeve in the pipeline. The tubular body of the pipe may be held in a closed mold at a time as the sleeve is placed in the pipe, filled (for example, 5000-10,000 psig) working liquid, such as water, under high pressure (for example, 5000-10,000 psig). Installation for hydroforming may consist of, for example, collectively sealing pistons and hydraulic pumps that, in General, it is known from the prior art. It may be desirable axially feeding the sleeve, applying a pushing force of compression is proportional to the hydraulic pressure, for example, several thousand psig) to the ends, while the hydraulic pressure acts on VD sleeves.
The process of hydroforming causes plastic expansion sleeve until the sleeve will not come into contact with and adopts the shape of which corresponds to the internal profile of the pipeline (see, for example, the sleeve 550 in VD housing 502 pipeline figure 5). You can use special lubricants for forming metal to minimize the friction between the LP sleeve and VD of the pipeline. Upon completion of the hydraulic expansion of the excess material of the sleeve, which passes through the axis outside of the two ends of the pipe can be cut to desired length.
After removing the internal hydraulic pressure sleeve feels not what alsoe elastic compression in the pipeline, in the result between the sleeve and VD pipeline remains small annular gap. This gap can be filled with a polymer, such as epoxy resin using a known process, vacuum filling. It can also be filled with a corrosion inhibitor, such as resin and/or a lubricant (e.g. oil or grease). The filling material is used to minimize the penetration of the corrosive fluid in the annular gap and to minimize any relative movement of the sleeve in the pipeline.
An expandable tubular sleeve may have a thin-walled tubular body made of metal or polymer, and has a diameter slightly smaller smallest VD drill pipe to facilitate entry of the sleeve into the pipe. The cable passes between the sleeve and the inner wall of the pipeline. In some cases, for example when using a polymer sleeve, the cable may be embedded in the wall of the sleeve. When the metal sleeve protective strip (for example, metal rods or elongated cushion, described below) are located near or around the cable to protect it from damage during expansion of the sleeve. In addition to cable protection extended tubular sleeve can also protect the pipeline (in particular, the drill pipe from corrosion, erosion, and other damage. In some the older cases, the sleeve may eliminate the need for any coating VD drill pipe and thus, to reduce the total cost.
In one example, the section of drill pipe has a VD of 3.00 inches at the end connections and VD 4,276 inches in the Central part of the body of the tubular sleeve. In this geometry a metal tubular sleeve may extend from the original LP is slightly less than 3,00 inches to ND 4,276 inches to match the profile of internal Affairs of the drill pipe. This leads to increased approximately 43% and involves the use of plastic pipe material, such as fully annealed 304 stainless steel pipeline (LP 3,00" × wall thickness 0,065") for hydroforming. Presumably, such a sleeve may also undergo significant elongation (e.g., 55-60%) during hydroforming.
The aim of the process of hydroforming is the final state voltage (at all points of the pipe) in the designated safe areas with sufficient margins of safety. The level of thinning the wall of the sleeve and the resulting margins of safety that can be achieved in the process of hydroforming, can be obtained from the relevant experiments.
According to Fig.7 another method of expanding a tubular sleeve, marked 750, for securing cable 714 in the pipeline 710 involves the use of charge 754 explosives. By analogy with hydroforming relatively thin-walled sleeve 50 is placed in the pipeline, for example drill pipe 710. Charge(s) 754 explosives detonate inside the sleeve 750, leading to its rapid expansion and coordination with VD drill pipe. To protect the cable 714 from damage in the explosion, you can use a metal strip (not shown). Ideally, the sleeve will be metallurgically mn is attached to VD drill pipe by the force of the explosion. However, to avoid damaging the cable 714 may be enough that the sleeve is expanded using a relatively small amount of explosives to a hidden column is not joined VD drill pipe, but roughly corresponded with VD in size and form (i.e. so that a narrow annular gap). Similarly hydrothermodynamic sleeve, resin or other protective material can be placed between the sleeve 750 and drill pipe 712 to fill any voids and provide protection against corrosion.
On Figa shows a view in section of the pipeline 810, similar to the pipe 510, shown in Figure 5, but with the use of the elongated cushion 856 together with the expandable tubular sleeve 850 for mounting one or more conductive wires (also known as cable) 814 according to the present invention. On FIGU shows a perspective view of the pipe 810, shown in Figa, after expansion of the expandable tubular sleeve 850 with coming into contact with UDL the United cushion 856 and the inner wall of the pipe 810. The tubular body 802 of the pipe 810 is equipped with a pair of communication connectors 821, 831 on or near the corresponding covering, and covered the ends 822, 832 tubular body 802. Elongated cushion 856 is at or near the inner wall of the tubular body 802 to protect and secure the cable 814 passing between communication connectors 821, 831, to the inner wall of the tubular body 802, and thus establish a secure wired connection. Elongated cushion may be made of metal, which allows it to bend in accordance with the profile VD pipe 810. Features the key groove (not shown), is accomplished by machining on VD, the connecting ends of the pipeline, can be used for fastening it to the pillow. It is obvious that the pillow can be attached to the inner wall of the pipeline by other means, for example, using a suitable adhesive. This attachment prevents the movement of air bags during expansion of the tubular sleeve 850.
On Figa shows the cross section of the pipe 810, shown in Figa, taken along the line 9A-9A. Cylindrical expandable tubular sleeve 850 shown in unexpanded condition, and alternative U-shaped expandable tubular sleeve 850' shown in dashed lines. The sleeve 850 initially round on arachnae section, and its diameter is close to the final expanded diameter of inside of pipe 810 at the time of entry of the sleeve into the pipe 810. The sleeve 850' pre-attached U-shaped, partially compressing the sleeve. In any case, the sleeve (for example, 850 or 850') will have an OD slightly smaller minimum VD (denoted as VD3) at the end connections of the pipeline 810.
On FIGU shows a detailed view in cross section of a pipe section 810, where the sleeve 850 expanded from entering into contact with the elongated cushion 856 and the inner wall of the housing 802 of the pipeline. Advanced sleeve 850 together with canavati metal pillow 856 secures the cable 814, going between the ends of the pipeline (e.g., drill pipe) 810 along its internal Affairs. Groove 858 metal pillows 856 provides a smooth channel for cable and protects the cable 814 from the forces of extensions attached to the sleeve 850, and also on the conditions of the well.
Tubular sleeve 850 can be extended, coming into contact with the cushion 856 and the inner wall of the pipeline, under the action of pressure fluid on the inner wall of the sleeve (as described above with reference to hydroforming in connection with Figure 5-6), by application of mechanical force to the inner wall of the tubular sleeve (see Figs), or a combination of these actions. In addition, the expansion sleeve can include de is onciu explosives in a tubular sleeve, resulting force of the explosion acts on the inner wall of the tubular sleeve, as described above with reference to Fig.7.
On Figa-B shows an expandable tubular sleeve 1150, equipped with a set of axially oriented slots 1162, facilitating the expansion sleeve. Thus, the tubular sleeve 1150 is introduced into the drill pipe or other pipe with closed slots 1162, as shown in Figa. Mechanical or hydraulic mandrel M (see Figs) is used to expand the sleeve 1150 with opening slots 1162 according Figv.
According Fig-9 form an elongated cushion 856 essentially defines a cylindrical segment, the outer arcuate surface which is consistent with the inner wall of the housing 802 of the pipeline (i.e. elongated cushion 856 has a Crescent shape) to reduce the maximum stress in the sleeve 850. On the outer arcuate surface of the cushion 856 formed by an elongated groove 858 for receiving one or more conductive wires (i.e. cable) 814. As noted above, the pillow 856 attached to VD pipeline 810 to the expansion sleeve 850, for example, sticking a pillow 856 to the inner wall of the pipeline to ensure that it will not move during expansion of the sleeve. However, in the case of metal pillow, the pillow can be pre-formed in compliance and with the profile of internal Affairs of the pipeline (for example, drill pipe), which also helps to hold the cushion in place during expansion of the sleeve. In the pipeline 810 can be used feature in the form of slot/keyway groove (not shown) at its VD is at or near the end fittings for the cable 814 from the wired channel 858 pillows 856 to holes or grooves made using "gun drill", (not shown) at the ends 822, 832 pipeline.
On Figa-B, it can be seen that the elongated cushion, such as pillow 1056 may be essentially made of metal, polymer, composite, fiberglass, ceramic, or combinations thereof. In particular, according to the options exercise of providing a metal pillow, pillow 1056 can be attached to the inner wall of the pipeline 1010 by welding pillows to it in one or several places 1055 (see Figv) along pillows 1056. In this configuration, welding, expanding the sleeve is not required for mounting/protection pads 1056 in the pipeline 1010. Pillow 1056 may be attached to the inner wall of the pipeline, intermittent e.g., spot or continuous welding. The pillow may have a different configuration, for example spiral, straight or sinusoidal. Robotic welding jig can be used to achieve, for example, mid tridtsatimetrovoy section Boo is strong pipe. The inner wall of the drill pipe or other pipe) is used as part of the channel for the wire that allows you to effectively increase the diametrical clearance drill pipe and may alleviate problems of erosion, decrease of pressure of drilling mud and obstacles to the promotion of logging instruments, etc. This design involves the use of canavati metal pads or strips, which repeats the profile of the VD of the drill pipe. Wires installed in this canavati metal strip, go to the grooves at the respective ends of the pipeline through holes drilled in the ends of the connection.
According to other variants of the invention, in which the cushion is made of fiberglass, such as pillow 1256 on Fig, the cushion is attached to the pipe 1210 by the addition of cushions 1256 to the inner wall of the tubular body of the pipe, for example, epoxy resin 1266, which is usually used to protect against corrosion. In addition, one or more conductive wires forming the cable 1214, can be attached to the inner wall of the tubular body, for example, using the same epoxy resin 1266. Fiberglass cushion 1256 promote adhesion cable 1214 due to the presence of porous fabric to maximize contact area with the epoxy resin and in order to ensure secure attachment. Fiberglass cushion protects the cable from erosion, abrasion and other mechanical damage, even when otkolupyvala epoxy coating.
On Figa-B shows the views in cross section of an alternative expandable tubular sleeve 1350, in the respective compressed and expanded States. The sleeve 1350 is used for fastening the elongated cushion 1356 in the pipeline 1310 according to the present invention. Tubular sleeve 1350 cut along the entire length (e.g., axially or spirally), the diameter of the tubular sleeve to the incision does not allow him to enter the lowest VD, denoted as VD4pipe 1310. The compression force is applied to the cut tubular sleeve 1350 for radial compression of the tubular sleeve in the form of a spiral, so that he entered into the minimum clearance VD4at the end connections of tubular casing pipe 1310. Although tubular sleeve 1350 is maintained in a compressed state, it is in the pipeline 1310, as shown in Figa. Accordingly, the elongated cushion 1356 is between pipeline 1310 and a tubular sleeve 1350. Tubular sleeve 1350 then released (and possibly forced open) from its compressed state to the tubular sleeve radially expanded, entering into contact with the elongated cushion 1356 and a tubular casing pipe 1310, as shown in IGV. In this position, at least a section of the sleeve 1350 will be extended to a larger VD, denoted by VD5intermediate section of the casing pipe 1310. To provide additional strength inside the open tubular sleeves can add support ring and weld them in place by spot welding.
On Figa shows the cross section of the pipeline 1410 using one or more internal grooves 1458 on its inner wall for protection and fixing of cable 1414. The pipeline 1410 equipped with a communication connector (not shown) on or near each of the two ends of the tubular body of the pipe. Internal groove 1458 formed in the inner wall of the tubular casing pipe by machining or, preferably, during the process of extruding pipe. Groove 1458 takes place essentially between communication connectors pipeline. Cable 1414, having one or more conductive wires, passes through the groove 1458. Cable 1414 is connected between the communication connectors, like the above, to establish one or more communication lines. Cable 1414 fixed in the inner groove 1458 sealing material 1466.
Alternatively, the groove 1458 may include one or more plates 1448 attached to vnutrennyaya tubular casing pipe, according Figv to independently cover each of the one or more grooves. Cover strip 1448 can be attached to the drill pipe or other pipe 1410 using traditional welding methods or methods of explosive forming. For corrosion protection on VD pipes are often impose epoxy coating that can also serve as a protection of the wires in the groove. Alternatively, the cable 1414 can be fixed by holding the cable through one or more small second pipes, each of which is attached to or embedded in one of the grooves, each second pipeline has such a shape and orientation that allow it to be, essentially, between communication connectors (not shown in Figa-B).
On Fig shows the cross section of the pipeline 1510 using one or more grooves 1558 on its outer wall and the outer(m) hidden column/sleeve 1550 to protect and secure the cable 1514 having one or more conductive wires in the groove(s) 1558, according to the present invention. Cable 1514 may be sealed in the groove(s) and, alternatively, it may be covered in the groove(s), for example, by attaching the sleeve 1550 to the outer wall of the pipe 1510. Such sleeve 1550 may be made of metal, polymer, composite, Steklovolokno is, ceramics or combinations thereof.
On Figa and 16B shows an alternative cable bracket. These figures depict elongated cushion 1656 in neformalnom and molded positions, respectively. Pillow 1656 may be similar to the pillow 856 shown in Figv, and placed in the pipeline similar methods. Pillow 1656 may also be a pre-molded cushion, which is located inside the cable 1614. In addition, the pillow 1656 can be a pillow, made of composite material, which is able to take the desired shape when it is attached to the pipeline 1610.
Pillow 1656 shown in Figa, preferably, is an elliptic pillow, can hold cable 1614 in place pipe 1610. The pillow can be made of composite material inserted in her cable 1614. The pillow can be a flexible composite strip placed along the inner surface of the pipeline.
The cable may be in the hole, passing through the composite material is formed together with the composite material. As shown, the cushion may be provided with an additional wires or fibers to enhance the pillows and pipeline. Wires, fibres and/or cables can be placed in the composite using encapsulation e is Stomer or plastic.
The pillow is contiguous with the inner surface of the pipe and attached to it. As shown, the pillow can be hydroforming in place between the sleeve 1650 using the methods described herein of hydroforming. Alternatively, the cushion can be attached using welding, fasteners, or other methods as described, for example, in relation to Figa and 9B.
According Figv pillow can be made of composite material, which allows it to deform when making hydroforming or pressing on the spot. Preferably, the cushion is deformed so that it reaches the shape of the filler, which corresponds to the shape of a tube.
On Figa and 17B shows an alternative cable bracket. These figures depict elongated cushion 1756 in neformalnom and molded positions, respectively. Pillow 1756 (with wires 1760 inside) is located between the sleeve 1750 and pipeline 1710 and fixed there. Pillow 1756 may be similar to the pillow 1656 shown in Figa and 16B, except that the cushion is further provided with a groove 1762. In this case, the cable 1714 remains separate from the pillow. The cable can be placed in the groove 1762 when placing the cushion in place. Alternatively, the cable can be done in the groove after placing pillows on the inner surface of the drill collar.
On Phi is .18A-B shows another alternative wire holder. These figures depict the metal brackets attached to the inner surface of the pipeline 1810 mechanical fastening or welding 1840. Metal holder shown in Figa, is a metal strip 1850a in the form of convex strips forming the groove 1862a between the strip and the pipeline 1810. The strip may be a flat piece of metal, bent or molded to form grooves 1862a. The ends 1852 grooves 1862a, preferably, attached to the pipeline 1810 welded connections in 1840. Groove 1862a able to take the pipeline.
Metal holder 1850b shown in Figv similar metal strip as shown in Figa, except that he is a metal cushion, formed, for example, cold extrusion. The form of cushions, preferably, is consistent with the inner surface of the pipeline 1810, and between them is formed a groove 1862b.
On Figa-20C demonstrates how to use the key grooves of the pipeline for the accommodation sleeve and/or fixing the cable in the pipeline. According to Fig 19A-C, the pipeline has a key groove capable of receiving the conductor holder. According Figa-C pipeline has a key groove capable of receiving the conductor holder and the sleeve. These figures depicts a configuration which you can use to optimize the internal diameter of the pipeline.
On Figa shows the pipeline 1910 with keyway 1970 along its inner surface. The keyway may be Vistanova in the pipeline for the moulding of the pipeline. Alternatively, the keyway can be machined in an existing pipeline.
The keyway passes linearly along the inner surface of the drill collar. The keyway is located near at least one end of the pipeline to accommodate the conductor holder. As shown, the keyway passes linearly along an area of the inner surface of the drill collar. However, the keyway may be held at any distance and in any way. Preferably, the keyway is in place of the drill collar, where the internal diameter of the pipeline is reduced to provide space to accommodate the conductor holder (and/or sleeves) to avoid additional reduction of the internal diameter at the expense of the holder of the cables and/or hoses. According Figa the keyway extends from the flange 1980 drill collar to the position of 1982, where the inner diameter is changed.
The keyway is located adjacent to a wired channel 1990 for the formation of a continuous path of the pipeline. In this configuration, the connector can be located in the groove 1992, and the cable (not shown) passes from the connector through the wire channel and to the bracket 195 wires. Pillow 1950 may be the same as any of the holders of the wire, for example, depicted in FIGU-18C. The 1950 sleeve may be about pillows for securing the bracket in place.
On FIGU shows a view in section of the pipeline 1910, shown in Figa, taken along the line 19B1-19B1. According Figv the keyway 1970 capable of receiving a conductor holder 1950. As shown, the conductor holder is the same as the pillow 1756 shown in Figa, but you can use other holders of the wire. Holder wires are clamped into the key groove of the 1950 sleeve, but the sleeve is not required. Conductor holder can be glued in place. As shown, the keyway allows you to place the pillow in the drill collar so that the internal diameter of the pipeline 1920 is not reduced because of the conductor holder.
On FIGU shows an alternative the keyway 1970a, having an alternative form. The keyway 1970a is convex keyway groove capable of receiving the conductor holder 1956. The bracket may be fastened in place with the sleeve so that the pillow is consistent with keyway.
On Figs shows a view in section of the pipeline 1910, shown in Figa, taken along the line 19C-19C. In this place the keyway is missing, so the pillow and the sleeve are held at a distance from the pipeline 1910, thereby reducing the internal diameter of drobopro is Yes in this place.
Figa-C similar Figa-C, except that the keyway 2070 able to take as a holder 2056 wire and sleeve 2050 pipeline 2010. The keyway is depicted running from shoulder to 2080 position 1982. This configuration is designed to accommodate the sleeve and holder of the wires so that they do not reduce the internal diameter of the pipeline for 2010 and ensured the maximum cross section of the stream.
On FIGU shows a view in section of the pipeline, shown in Figa, taken along the line 20B1-20B1. On FIGU shows an alternative configuration Figv without feather key groove. In this configuration, the pad and the wire pass over the inner diameter of the pipeline. On Figs shows a view in section of pipeline 2010, taken on line 20C-20C and not having a key way inside.
Although Figa-20C shows a single conductor holder together with a single sleeve, but may be provided options. For example, the sleeve may not be needed when the bracket is securely attached. In some cases, the sleeve can be used without a holder wire. You can use one Il several holders of cables and/or hoses.
Specialists in this field it is obvious that described here wired pipelines is very suitable for integration into the drill string as the telemetry system of interconnected WDP for re the ACI signals in the conditions of the wellbore. Each pipeline includes a tubular body provided with a communication connector at or near each of the two ends of the tubular housing, and communication connectors allow you to transmit signals between adjacent interconnected pipelines. Specific versions of the system, for example an elongated cushion and/or the expandable tubular sleeve, arranged along the inner wall of the tubular body of the pipe, and one or more conductive wires pass along bags/sleeves so that one or more wires are placed between the inner wall of the tubular body and at least a section of the cushion/arm. One or more wires, also called a cable connected between the communication connectors for establishing a wired communication line.
It is obvious that the present invention provides some relief in the production. Drill pipe, for example, usually made of three separate parts, which are welded together. The Central part (tubular body) is a simple steel pipe, is mounted at each end by means of hot pressing. End part (instrumental sections or end connectors) begin as gracestone steel forms on which thread and others is particularly accomplished by machining before as they will be friction welded to the tubular body.
Described here is a modification in respect to the normal of the pipeline, in particular drill pipe, can, in General, to implement after the drill pipe is completely manufactured. However, certain operations can be simplified if done in the course of manufacture. For example, the channels for the wires (for example, holes drilled gun drill) from the coils of the transformer in a tubular casing pipe can be performed by means of mechanical processing simultaneously with the threads and the shoulder of the pipe sections. Similarly, grooves and other features can be added to the body before surgery friction welding, which connects instrumental section with a tubular body, when VD tube housing more affordable.
Alternatively, many of the methods described in the previous sections, you can profitably be included in the production process, and, in some cases, according to different time stages of the process. For example, features of the wiring can be built into the long middle section of drill pipe to all stages of precipitation and/or welding. Embedding features wiring of the drill pipe having a uniform VD, may be easier than implementing them in the finished drill pipe, which usually has a smaller VD at the ends. After renaisence equipped with features wiring, it can be subjected to known operations upsetting and welding. The following diagram design provides built-in feature of the wiring that passes for 80% of the length of the finished drill pipe (for example, 25 feet 30).
First, a metal or polymeric tubular sleeve may be done by hydroforming in the case before the operation rainfall. Since the internal diameter should be more uniform, the magnitude of the expansion will be significantly reduced, which simplifies operation and improves the consistency. A separate method of laying will be used to transfer transactions from the instrumental section and beyond the frictional connection.
Similarly, the metal sleeve can be molded by an explosion inside the tubular body of the pipe to friction welding. You can also metallurgically mn to attach the sleeve to the pipe, which facilitates the precipitation process. Similarly, the metal cushion is easier to weld in place prior to friction welding.
In addition, internal/external grooves for placement of the cable can be ekstradiroval, be molded or machined into the tubular body of the pipe to precipitation and body welding. In particular, extrusion or molding grooves will be cheaper than machining, and the groove will be stronger and more resistant to fatigue.
Other modify the tion of production refer to the ability of wired pipelines, corresponding to the invention to withstand wiring faults or other faults. On Figa schematically shows a wired communication line in accordance with the pipeline (for example, WDP), shown in Fig.2-4. Thus, a pair of opposite toroidal transformers 226, 236 (components corresponding communication connectors) are connected by cable 214 having a pair of insulated conductive wires laid in the tubular body of the pipe. Each toroidal transformer includes a core material having a high magnetic permeability (e.g., supermalloy), wound N turns of insulated wire (N˜100-200 turns). Insulated wire heterogeneous wrapped around a toroidal core with the formation of the windings of the transformer (not numbered separately). Four isolated soldered, welded or twisted joints or connectors 215 is used to connect the wires of the cable 214 with the corresponding windings of the transformers 226, 236.
Reliability can be an important factor for such sections of the WDP. When the breakage of any wire in this section, the entire system WDP using the damaged section WDP also fails. There might be some failure modes. For example, connection "cold soldering" are not unusual, when the solder loosely associated with about the mi wires. They may periodically to strip and then to break open. Continuous vibration can cause fatigue and breakage of the wires, if they are not tight. Thermal expansion, shock, or pollution can cause damage or breakage of the wire used to tie the toroidal core.
On FIGU schematically shows a pair of independent conductive lines for use in the pipeline, for example, section WDP according to the present invention. Thus, a pair of opposite toroidal transformers 1626, 1636, each of which includes a winding system having two independent windings, with each winding lies, essentially, in 180° sector system of the windings. In particular, the toroidal transformer 1626 has a first winding 1626a and the second winding 1626b, each of which is independently and uniformly wound on half the circumference of the toroidal core transformer 1626. Similarly, a toroidal transformer 1636 has a first winding 1636a and the second winding 1636b, each of which is independently and uniformly wound on half the circumference of the toroidal core transformer 1636. A pair of insulated conductive wires, referred to as cable 1614a, passes between and attached to the corresponding ends of the windings 1626a, 1636a through four isolated avannah solder 1615a. Similarly, a pair of insulated conductive wires, referred to as cable 1614b, passes between and attached to the corresponding ends of the windings 1626b, 1636b through four isolated solder 1615b. Cable 1614a laid regardless cable 1614b (referring to a separate electrical channels, but not necessarily separate designated strip in WDP), so the cables and their respective interconnected winding form two independent wire line.
Obviously, the reliability of the WDP can be improved by using the configuration of a double winding (or other multiple winding) according Figv. In this design there is a second, redundant circuit. Each toroidal core wound with two separate windings (dotted and dashed lines). Each winding may have the same number of turns (M). However, the two windings may have a different number of turns (N) and, however, provide most of the benefits of redundancy. If M=N, the electromagnetic properties of the new design is essentially the same as the previous design.
Since the two circuits are connected in parallel, failure of one circuit, the other circuit can usually still move the telemetric signal. In addition, the characteristic impedance of the line should not significantly change, so t is some failure, not likely to lead to an increase in attenuation. The series resistance of the connecting wires can grow in this section of drill pipe at the precipice of the same chain, but the series resistance of the connecting wires in no way can lead to significant losses during transmission. The flux of the toroidal core may also slightly increase at the precipice of the same chain, but it can also lead to minor effect. Since the magnetic permeability of the core is relatively very high, most of the flux from one winding should remain in the core.
Uncorrelated failures should be greatly reduced. For example, suppose that the compounds of the cold soldering is not correlated with the frequency of 10-3the soldering operation. Consider 660 drill pipe (20000 feet) with one chain and four solder connections on drill pipe. Then the number of connections cold soldering for this system (10-3)(660)(4)˜3. When the violation of only one of these connections, cold solder during operation of the bit in the WDP system may fail. Now consider the WDP with a redundant, second circuit. Each drill pipe now has 8 solder, so the drillstring length 20000 feet will have (10-3)(660)(8)˜6 joint is cold soldering. However, if the violation of one of these soldered connections, the second circuit may still transfer the signal. The difference violations of the second circuit due to the connection of cold solder is now ˜10-3.
Another type of failure can occur if a stone or other small object comes in contact with the winding and breaks or cuts the wire. If two windings are essentially 180° sector on opposite halves of the toroidal transformer, the likelihood of damage to both windings is greatly reduced. Thus, the physical separation of the two windings is preferable, but it is also possible to interleave two windings, each of which is 360° toroidal core.
If two chains laid on two different channels along the drill pipe between toroidal transformers, the probability of simultaneous damage to both circuits is significantly reduced. For example, if there are any sharp edges in the channels where the wires along the drill pipe, shock or vibration can cause the wires will RUB on the sharp edge and be cut. These sharp edges can occur due to incomplete removal of burrs mechanical parts during production.
From the above description it follows that the preferred and alternative embodiments of to the present invention allow various modifications and changes not beyond his true identity. For example, in the aspect of independent wired communication line of the present invention, three or more chains can be used in wired drill pipe for redundancy. In this case, each winding will lie essentially in 120° sector toroidal transformer. Thus, even in the event of breakage of the two circuits in one drill pipe, the third circuit will continue to carry the signal.
Other types of inductive links will also enjoy the benefits of redundant circuits. For example, known systems use WDP inductive connectors at each end of the drill pipe, and each connector includes one or more wire loops in the magnetic cores. However, such systems contain only one chain on the drill pipe. According to the aspect of independent wired communication lines of the present invention can use two or more independent chains, each chain consists of a single loop of wire on the connector and the connecting wire between the two connectors.
On Figa-D presents methods of protection toroidal transformer 226 of the connector 220, shown in Fig.2-4. In each of these figures detailing the plot section WDP 210 and shows a variety of slots 225, which accommodates toroidal transform the EO 226. The holder of the transformer, usually in the form of a ring, is located in the slot 225 at the end of the section WDP 210.
According Figa transformer 226 is in the slot 225 with cables 214, passing from him in a wired channel 2290. Sealing material 2295 may be placed around the transformer 226. Details of the transformer 226, sealing material 2295 and other features of the connector 220 is additionally described in U.S. patent No. 6641434, previously incorporated here by reference. The sealing material can be introduced into the groove after placing the transformer in the groove. Alternatively, the transformer can be pre-sealed prior to insertion into the groove, thereby providing the decline in the transformer.
Holder 2297 transformer is located in the slot 225 for securing the transformer 226 in it. Holder 2297 transformer is located in the hole of the slot 225. Holder 2297 transformer shown frictional placed in the slot 225. The holder of the transformer, preferably made of non-conductive material, for example, a composite material, which can be used to seal the slot. The binder material can be used for fastening the holder of the transformer in place. Preferably, the holder of the transformer is at or below the surface of the conductor holder. In some cases, the holder t is Informator may be subjected to a mechanical treatment to reduce the holder of the transformer to the desired position in the slot 225.
On FIGU shows an alternative slot 225a and the holder 2297a transformer. This figure shows an alternative geometry of the slot 225. The slot and/or the holder may have a different geometry, designed to facilitate the fabrication section of the WDP, to facilitate placement of the transformer in the slots and/or to simplify the operation of the connector.
Holder 2297a transformer is slots 225a. As shown, the holder of the transformer is made of metal or other conductive material and attached to the wall of the slot 225a. The holder may be provided with teeth 2299 (or other capture device), designed to fix the holder on the surface of the slot 225a. When using the metal bracket holder normally in contact with only one surface of the slot 225a avoid short circuit in the connector 220. The sealing material may be placed around the holder for additional sealing of the slot and/or protection of the transformer. In this case, the holder is located at a distance below the surface of the section WDP 210. The sealing material can be placed in the slot before, during and/or after placing the holder in the slot. The sealing material can be added to fill the slot.
On Figs shows an alternative slot 225b and the holder of the transformer 2297b. It is shown that the slot 225b has the pockets 2288, capable of receiving a sealing material. Pockets can also be used for receiving a binder or other material to mount the transformer in place. An additional area in the slots 225b can be used for attaching the transformer to prevent removal.
Pockets can be in the form of thread passing through one or both walls of the slot 225b. These pocket thread and/or other threads may be provided in the slots 225b. These threads can be used for the reception and accommodation of the holder 2297b in the slots 225b. Holder 2297b you can screw in the slot 225b to the desired depth. Hole 2298 or other cavity may be in the holder 2297b for reception of a tool that you can use to install the holder 2297b. Usually in the holder there are two such holes, allowing you to rotate the ring and locking it in place.
On Fig.22D shows an alternative configuration of the holder. This holder is essentially the same as the holder 2297a shown in Figv, except that section WDP 210 is equipped with a channel 2283 capable of receiving holder 2297a and locking it in place.
This usually requires that two adjacent sections of pipe have been sufficiently tightened (i.e. forcibly connected to each other with a torque sufficient to achieve proper Proc. of the service seal outer end with an external flange adjacent wired pipe), to the same torque to automatically fasten the inner flange to the inner end of the tube adjacent section of the wired pipe to securely form a closed toroidal channel with high conductivity and low permeability. In some cases, the contact between the connectors of adjacent tubes may be insufficient for electrical connection between them. On Figa-24 presents methods of adjustment section WDP to provide improved contact between them.
On Fig A-D shows detailed views of the end sections WDP 210 and depicted transformer 226, placed in the slots 225. In each of these figures shows a section of the WDP, which can be subjected to mechanical processing or adjustment of the original size (shown in solid line) to a reduced size (shown by the dashed line).
On Figa shows a section WDP 210, a transformer 226, slot 225a and the holder 2297a wire shown in Figv. Holder 2297a wire is located at a distance below the end 2375 section WDP 210. Section WDP can be subjected to mechanical processing and reduced, as indicated by the dashed lines. Thread 2377 may also be subjected to mechanical processing for the formation of the same or another thread to facilitate the connection with the adjacent section of the WDP.
On FIGU shows an alternative configuration section WD 210 and the holder 2297a. From this figure it follows that the slot may be subjected to mechanical processing on the distance from the end 2375 section WDP. The transformer preferably is in the slot 225a' at a depth sufficient for machining the end of the section WDP without damaging the connector. The depth can be adjusted as desired. Depending on the depth of the connector section WDP can be repeatedly subjected to mechanical processing. In some cases, the holder may also be subjected to mechanical processing or replaced, so that he could continue to protect the transformer.
According Figs redundancy can be provided by adding a second transformer 226, cable 314 and/or holder of 2297. In this case, the end 2375 may be subjected to mechanical processing to remove the first connector and the conductor holder and still have a second transformer, available for use. It is possible to provide one or more redundant transformers and cable. As shown, redundant transformers are located in the same groove on the flange of the pipeline. However, redundant transformers and/or grooves may be located at different positions with respect to the same or other ends of the pipeline. In cases where several transformers and/or cables, the signals mogote be transmitted through one or both of the transformer.
On Fig.23D shows an alternative transformer 226 and the holder 2297 transformer section WDP 210. The transformer and the holder shown in Fig.23D the same as shown in Figa, except that the slot 225 was extended to the end 2375 section WDP 210, and the holder 2297 was expanded to fill the additional area of the slot. The holder can be extended, as shown, or placed in the slots with additional sealing material. As shown, the holder is machined with an end section of the WDP and reduced, as shown by the dashed lines.
The configuration of the extended slots and machined ends, shown in Figa, can be used with any configuration of the holder or of the slot.
On Fig shows an alternative method of ensuring good contact between adjacent sections of the WDP. Strip 2455 is located between adjacent sections of the WDP to fill any gap between them. The gasket may be a solid piece, bolted to the end of the section WDP for threaded connection with the adjacent section of the WDP. Typically, the threaded pipe is made of metal. However, the non-conductive section 2457 placed in the area of the strip to the transformer 226 could create a toroidal channel. As shown, a non-conductive area is located adjacent to the slots 225 in the neighbour of their drill pipes, and conductive areas 2459a and b are in other areas.
The strip may be a single item, passing around the connection. Alternatively, the first section 2461 strip may be made in the form of a conventional screw strip, and the second section 2463 may be a box located adjacent to the ends 2357 adjacent sections of the WDP. Strip, fully or partially, may be used, if necessary, to fill gaps between sections WDP. Strips can be screwed on the thread 2377 section WDP or attached by fasteners or welding. If necessary, you can use one or more strips or portions of the strip. Preferably, the gaskets provide sufficient contact to support sections WDP, prevent flow of fluid between the sections WDP and communication between sections WDP. At least the area of the strip may be provided with a wear-resistant material. For example, section 2457 may be a wear-resistant ring.
The distance between the shoulder 2357 and 2359 first section WDP may be the same or slightly different from the distance between the shoulder 2357 and 2359 adjacent section WDP.
Specialists in this field of technology is also clear that the present invention according to its various aspects and options for implementation, not limited to the foreseen application to WDP. So, for example, wired communication line and related aspects of the present invention can be advantageously applied to the tubing, casing columns, etc. that are not used for drilling. One such possible application is permanent above ground installations in which sensors are used for monitoring various parameters of the reservoir over time. Accordingly, the present invention can be applied in such devices continuous monitoring to provide communication between the surface and permanent downhole sensors. In addition, different configurations and/or devices can be used in combination. For example, the gasket shown in Fig, can be used in conjunction with redundant connector shown in Figs.
This description is given solely for purposes of illustration and should not be construed in a restrictive sense. Scope of this invention should be determined only by the following claims. The term "comprising"used in the claims, should be understood as including, at least," so that the list of items described in the claims is an open set or group. Similarly, the terms "up," having," and "comprising" are to the open set or group of elements. Outp is the singular also means and plural unless specifically stated otherwise. In addition, the points of the method are not limited to the order or sequence in which the stages of such items. For example, the step of the method specified in the first paragraph of the way do not have to run to the stage specified in this second paragraph.
1. A segment of drill pipe, containing
a tubular body having an axial channel,
covering the end located on the first end of the tubular body with the first communication connector is placed in covering the end,
covered end placed on the second end of the tubular housing, having a second communication connector is placed within the end,
conductor connected to the first communication connector
connected to the second communication connector and the
passing through at least a section of the axial channel, and
expandable sleeve, placed in the axial channel of the tubular body, so that the area of the conductor passing through the axial channel is located between the inner wall of the tubular body and an expandable sleeve.
2. A segment of drill pipe of claim 1, wherein the expandable sleeve is plastically expanded state.
3. A segment of drill pipe according to claim 2, in which expanding the sleeve is metallurgically mn is attached to the inner wall of the tubular body.
4. A segment of drill pipe according to claim 2, in which the expandable sleeve contains a lot of axially oriented slots for easy expansion.
5. A segment of drill pipe according to claim 1, additionally containing an elongated cushion located close to the inner wall of the tubular body, and at least one conductor passes near the elongated cushion.
6. A segment of drill pipe according to claim 5, in which the conductor is held within the elongated cushion.
7. A segment of drill pipe according to claim 1, additionally containing a filler material placed between the expandable sleeve and the inner wall of the tubular body.
8. A segment of drill pipe according to claim 1, in which the channel of the conductor along the length of the tubular housing represents a direct channel or a spiral channel or sinusoidal channel or a combination of both.
9. A segment of drill pipe according to claim 1, in which the remedy of the guide contains a groove in the wall of the tubular body.
10. A segment of drill pipe according to claim 9, in which the groove is placed in the inner wall of the tubular body.
11. A segment of drill pipe of claim 10, further containing at least one plate covering at least one groove and attached to the inner wall of the tubular body.
12. A segment of drill pipe according to claim 11, in which the groove razmeshenija the outer wall of the tubular body, and optionally containing an outer sleeve located close to the tubular body.
13. A segment of drill pipe according to claim 1, in which the remedy of the conductor includes an elongated cushion.
14. The segment of drill pipe 13, in which the elongated cushion attached to the inner wall of the tubular body.
15. The segment of drill pipe 13, in which the elongated cushion contains a groove for placement of the conductor.
16. The segment of drill pipe 13, in which the inner wall of the tubular housing includes a key groove, and an elongated cushion placed into the key groove.
17. The segment of drill pipe 13, in which the elongated cushion forms a cylindrical segment, which essentially corresponds to the inner wall of the tubular body.
18. The segment of drill pipe 13, in which the elongated cushion is made of one of: metal, glass, elastomer, and combinations thereof.
19. The segment of drill pipe 13, in which the elongated cushion attached to the inner wall of the tubular body.
20. A method of manufacturing a segment of drill pipe containing phases in which
provide a tubular body having an axial channel, covering the end located on the first end of the tubular body, covered in the end placed on the second end of the tubular housing, the conductor, and covering the end includes a first communication connector is covered by the end includes a second communication connector, and a conductor connected to the first and second communication connectors and runs along the axial channel
insert the expandable sleeve in the axial channel so that at least part of the conductor is positioned between the inner wall of the tubular body and an expandable sleeve, plastically expand the expandable sleeve.
21. The method according to claim 20, in which at the stage of plastic expansion of the expandable sleeve promoting the mandrel through the expandable sleeve.
22. The method according to claim 20, in which at the stage of plastic expansion of the expandable sleeve detonate the explosive charge in the tubular sleeve.
23. The method according to claim 20, in which at the stage of plastic expansion of the expandable sleeve apply hydraulic pressure to the inner surface of the expandable sleeve.
24. The method according to claim 20, further containing a phase in which pre-formed expandable sleeve for the pre-placement area expandable sleeve to initiate expansion.
25. The method according to paragraph 24, in which at the stage of preliminary molding expandable sleeves make localized mechanical force to the inner wall of the tubular sleeve to shift teaching the TKA expandable sleeve inside or outside or in a combined direction.
26. The method according to claim 20, further containing a stage on which is placed an elongated cushion close to the inner wall of the tubular housing for protection of the conductor.
27. The segment of the wired drill pipe containing
a tubular body having an axial channel,
covering the end located on the first end of the tubular housing, having a first core material placed in covering the end of the covered end, placed on the second end of the tubular housing, having a second core material, is placed within the end,
the first winding wound around at least part of the first core material and a second winding wound around at least part of the first core material,
a third winding wound around at least part of the second core material, and a fourth winding wound around at least part of the second core material,
a first conductor connected to the first winding and the third winding and passing through the tubular housing, and
a second conductor connected to the second winding and the fourth winding and passing through the tubular body.
28. The segment of the wired drill pipe according to item 27, in which the first winding includes approximately the same number of turns as the third of the winding, and
the second winding includes approximately the same number of turns, and the fourth winding.
29. The segment of the wired drill pipe on p, in which
the first winding and the third winding lie in certain sectors
the first core material, and each sector occupies approximately 180° the first core material,
the second winding and the fourth winding are in separate sectors of the second core material, and each sector occupies approximately 180° the second core material.
30. The segment of the wired drill pipe on p, in which the number of turns for each of the first, second, third and fourth winding is approximately from 100 to 200 turns.
31. The segment of the wired drill pipe according to item 27, further comprising
the fifth winding wound around at least part of the first core material,
sixth winding wound around at least part of the second core material, and
the third conductor passing between the fifth and sixth windings and connected to them.
32. The segment of the wired drill pipe containing
a tubular body having an axial channel,
covering the end located on the first end of the tubular body,
covered end placed on the second end of the tube to which rpusa, and
at least one communication connector is placed in covering the end or covered the end or there, in which at least one communication connector includes a slot, the transformer is placed in the slot; a sealing material placed in the slots and around the transformer, and a conductive holder transformer attached to at least one surface of the slot, and the opposite side of the slot are isolated from each other.
33. The segment of the wired drill pipe on p in which the holder of the transformer is placed in the channel inside of the slot.
34. The segment of the wired drill pipe containing a tubular body having an axial channel, covering the end located on the first end of the tubular body, covered in the end placed on the second end of the tubular body, and at least one communication connector is placed in covering the end or covered the end or there, in which at least one communication connector includes a slot, the transformer is placed in the slots;
sealing material placed in the slots and around the transformer, and
a non-conductive holder transformer having at least one hole capable of receiving mounting the tool.
35. The segment of the wired drill pipe, which of the original size can be customized to the smaller size, containing a tubular body having an axial channel, covering the end located on the first end of the tubular body,
covered end placed on the second end of the tubular housing, at least one slot, placed in at least one of the covering end and covered the end, at least one transformer is placed in the slot, the filler placed in the slots, and
the holder of the transformer placed at a selected distance from the surface of the slot.
36. The segment of the wired drill pipe on p, optionally containing a second transformer placed in the slot at a selected distance below the first transformer, the second holder of the transformer is placed in the slot at a selected distance above the second transformer.
37. Wired drill pipe containing a first tubular part having a cover end, the second tubular part having covered the end, and covering the end of the first tubular part and covered the end of the second tubular parts are threaded connection, the first transformer is placed in the first tubular part, near the flange to the outer end
Stroytransgaz, placed in the second tubular part, near the shoulder covered in the end, so the first transformer is located near the second transformer, and
a gasket disposed between the flange to the outer end and a collar covered in the end, and the seal is made of non-conductive material and is located near the first and second transformers.
SUBSTANCE: in different types of broadcasts, with different levels of coverage in a wireless broadcast network, each base station processes data for global transmission in accordance with the first mode (or coding and modulation scheme) for generating data symbols for global transmission and processes data for local transmission in accordance with the second mode for generating data symbols for local transmission. The first and second modes are selected based on the desired coverage for the global and local transmission, respectively. The base station also generates control signals and additional service information for local and global transmission. Data, control signals and additional service information for local and global transmission are multiplexed in their transmission intervals, which can be different sets of frequency sub-ranges, time segments or different groups of sub-ranges in different time segments. More than two types of transmissions can also be multiplexed and transmitted.
EFFECT: design of a wireless broadcast network, which can efficiently transmit different types of information with various fields of coverage.
59 cl, 13 dwg
FIELD: technology for simultaneous broadcasting radio-transmission of signals with analog modulation and of digital transmission signals.
SUBSTANCE: in accordance to the invention, amplitude-modulated signal of simultaneous broadcasting radio-transmission, which incorporates digital transmission signal and analog transmission signal in one transmission channel, is characterized by the fact that one side band of carrier of signal of simultaneous broadcasting transmission is modulated by digital transmission signal, and another band is modulated by correcting signal, which ensures provision of analog transmission signal of waveform envelope for demodulation. Generator of amplitude-modulated signal is intended to be used for generation and transmission of aforementioned signals.
EFFECT: creation of method for simultaneous transmission of digital and analog signals through a single channel.
4 cl, 2 dwg
FIELD: physics; measurements.
SUBSTANCE: invention pertains to geophysics, and particularly to geophysical well surveying for separating hydrocarbon layers. The apparent electrical resistivity is measured using lateral or electromagnetic logging probes before and after action of elastic resonance pulses on the layers in the 0.1-10 kHz frequency range. The action is effected using an electrohydraulic resonance apparatus. Measurements are done using lateral or electromagnetic logging probes. The collectors of hydrocarbon layers are separated based on the results of the measured apparent electrical resistivity of the layers.
EFFECT: increased accuracy of separating low-pore and low-permeability collectors with hard to recover hydrocarbon reserves.
FIELD: physics; measurements.
SUBSTANCE: invention pertains to exploration geophysics and can be used for analysis of explosive semi-wildcats. The logging station is mounted on an isothermic wagon, fitted on a chassis of an automobile and has an apparatus section with metering equipment and a section of pulling and running equipment, which is fitted with a pulling hoist with a cable, wrapped on a drum, an actuator for the drum, cable handler, unit for measuring depth with a meter element and a guide assembly with a counter balance weight, made with provision for changing position and fixation in the operation and transport positions, and a logging device. The apparatus section and the pulling and running equipment section are separated by an extra sluice section, in which there is an external door and doors to these sections. The pulling and running equipment section borders the rear wall of the cabin of the automobile so as to provide the driver with good view of the counter balance weight of the guide assembly, made in the form of an inclined adjustable console, logging instrument and well head. The counter weight balance of the inclined adjustable console is fitted with provision for changing its position in the horizontal plane and is at a height which exceeds the length of the logging instrument. The counter weight balance of the inclined adjustable console is equipped with a mechanism for pulling the cable, fitted with provision for maintaining constant tension force in the cable on the part between the counter weight balance of the inclined adjustable console and the drum. The technical outcome is the shortening of the time of assembling the logging station on the well, higher productiveness, reduction of manual labour, reduction of infiltration losses and improvement of working conditions.
EFFECT: shortening of the time of assembling the logging station on the well, increased productiveness and improved working conditions.
FIELD: geophysical well research, methods and devices for prospecting.
SUBSTANCE: invention claims well electromagnetic telemetric system with increased data transfer speed. An expression is suggested, which indicates that in case of actual decrease of frequency due to increase of phase condition number one can expect higher data transmission speed without expansion of frequency band.
EFFECT: disclosed system and method allow creation of stable efficient electromagnetic telemetric system with increased data transmission speed.
4 cl, 11 dwg
FIELD: flaw detectors, possible use for monitoring technical condition of steel columns in oil-gas wells.
SUBSTANCE: well flaw detector contains current commutator, signal and current inductance coils, main and backup current commutators, preliminarily twin operation amplifiers, signal transformer, generator of service signals, power amplifier, control block, timer, amplification coefficient commutator, device for selection and storage of data, synchronization device, connected to ground digital registration device through geophysical cable. Parameters of core and number of coils of signaling and current inductance coils are selected on basis of maximal researched diameter of steel pipes and on basis of detailing of measurements (transient process time is supposed to be less than time between measurement quanta at given speed of movement of electromagnetic flaw detector inside the well).
EFFECT: decreased distortion of shape of transient process of fading of magnetic field.
FIELD: testing of ground formation.
SUBSTANCE: device has change-over unit which has elongated body with tubular walls and central hole, made for placement of descending instrument. Tubular member has sections for transmission or/and reception of signal through tubular member; sections are provided with slots. Hydraulic insulation between internal and external sides of tubular member is provided by making anti-pressure barrier in slot-provided sections. Detectors and/or sources are mounted onto descending member made for passing through drill pipe string to engage inside tubular member when getting in coincidence with slot-provided sections. Descending member has modulator to conduct electric communication with surface in real-time scale and/or with remote well instrument. Assemblage of tubular member and descending instrument includes communication inductive members fro transmitting parameters of signal along radio channel. Descending instrument with replaceable end segment is used in method for measurement characteristics of formation for passing well through in different modes.
EFFECT: simplification; improved reliability; higher efficiency.
33 cl, 28 dwg
FIELD: survey of boreholes or wells, particularly to measure specific borehole fluid resistance.
SUBSTANCE: borehole resistivity meter comprises metal body, detector, including exiting and measuring toroidal coils coaxially arranged inside the body, fluid intake means and borehole fluid channel formed inside the body. The channel includes sealing members and measuring section defined by bush. The bush is made of dielectric material and located outside measuring coil.
EFFECT: increased measuring reliability, increased ability of resistivity meter assembling-disassembling.
3 cl, 2 dwg
SUBSTANCE: method comprises measuring the potential of the natural polarization of rocks and potential differences between the adjacent electrodes along the axis of the well. By solving the inverse problem, the value of the natural polarization potential and static potential of rocks undisturbed by external electric and electromagnetic fields are determined from the results of the measurements.
EFFECT: enhanced accuracy of measuring.
FIELD: cables for geophysical explorations.
SUBSTANCE: the cable has current conductors with an electric insulation of each conductor, multiple lays of the armor with a coating of plastic adhesive material. Each conductor is armored. The gaps between the armored conductors and the central part of the cable are filled with wires. The armored conductors and the wires are interweaved. The multiple lays of the amour are located on the interweaved armored conductors.
EFFECT: enhanced axial stiffness and efficiency of use.
5 cl, 1 dwg
FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil production. The device includes the lengthy protector made as the long-length stout cylinder with the installed inside core rod which has the output from protector at the side of its contact with the bottomhole equipment. The core rod has the supplemental output from the protector, opposite to the first output. The supplemental output is lengthy, bent towards the bottomhole equipment, placed lengthwise the protector and the bottomhole equipment to its upper part. The both core rod output zones adjacent to the protector are provided with lagging.
EFFECT: increased efficiency of protecting oil recovery equipment and ensured explosion and fire safety.
5 cl, 1 dgw, 1 tbl
FIELD: technological processes; measurement.
SUBSTANCE: method includes preparation of cement stone by means of its shredding. Cement stone immersion in corrosive solution is done in particles with size of 0.1 - 1.0 mm. Corrosive solution is selected from neutral or low alkaline medium in the form of sodium sulphide water solution. Cement stone soaking in corrosive solution is performed with continuous stirring with periodical sampling of liquid phase for chemical analysis for ion content. Determination of corrosion extent is done by change of sulphide-ions concentration. Method is characterised with reduction of corrosion detection time.
EFFECT: receipt of accelerated method for cement stone corrosion detection.
FIELD: oil industry.
SUBSTANCE: facility of downhole centrifugal pump contains of downhole electric pump aggregate, which combines electric motor with hydroprotection, pump and cable line, lowered into the well on lifting oil-well tubing - LWT, entry facility, controlling station and transformer. At that, electrode is lowered in well at the depth of beginning of asphaltic hydroparaffine deposits, made as column of pump rods, fitted with centring skids with dielectric qualities, providing electric isolation of pump rods column LWT and stuffing box, which provides electrical isolation of rod column from wellhead assembly. In upper - superstructure part pump rod column is hooked up to ground power unit of DC current, which second electrode is hooked up to wellhead.
EFFECT: effectiveness improvement of oil lifting in complex geological-and-technical conditions, deviated wells and while intense hydroparaffine deposits.
FIELD: electricity, electrical engineering.
SUBSTANCE: invention refers to electrical engineering and can be applied in electric machines for power supply of well logging equipment. Technological result implies reduction of diametric dimensions and weight. Generator is equipped with container housing and at least one fastener assembly, electrical connection, main rotor with main turbine, stator, exciting winding and permanent magnets. Auxiliary rotor is equipped with spindle passing inside and is supported in line with main rotor. Turbine is birotating. Permanent magnets are mounted on main rotor, and exciting winding is inside of permanent magnets, on spindle of auxiliary rotor. Noncontact electric-power transmission device is designed as primary winding, mounted on spindle of auxiliary rotor, and secondary winding, mounted inside of stator. Exciting winding is wired to primary winding of noncontact electric-power transmission device. Both rotors are sealed hermetically relative to each other and relative to stator with face seals in stator. Stages of birotating turbine are mounted nearby in central part of generator. Stator consists of upper and lower parts, mounted respectively in upper and lower supports with canals for drilling agent. Winding is wired to electrical connection through holes in stator. Inner hollow of generator is lubricant filled. Lubricant passage is on the top, and electrical connection is on the bottom.
EFFECT: power generator of well logging equipment is improved due to reduction of diametric dimensions and weight.
5 cl, 1 dwg
FIELD: well servicing systems.
SUBSTANCE: system includes computer-controlled system, which controls forcing (of fluids) and other servicing operations at well site, and also manages injection and extraction of reagents at reservoir storage. GPS device and another positioning device generate position value, which identifies position of service vehicle, which services the well. Reading of GPS indications is launched when parking brake of vehicle is engaged, while position value is recorded in conjunction with value of transformer signal related to the process. Value of transformer signal is connected to servicing vehicle, which realizes certain type of servicing operation at well site or reservoir storage.
EFFECT: increased quality of service.
3 cl, 3 dwg
FIELD: oil production industry, particularly operation of pipelines included in oil collection and reservoir pressure maintenance system.
SUBSTANCE: method involves mounting device on pipeline convergence point plate; arranging drainage unit at pipeline convergence point; arranging anode beds from opposite pipeline way sides; electrically linking pipeline convergence point with pipelines; performing test cathodic protection switching-on; setting protective current value providing necessary length of zone to be protected; grouping pipelines to be protected according to protective current value; setting particular protective current for each pipeline group; calculating distance from anode bed to pipeline to be protected in dependence of value of protective current running off anode bed.
EFFECT: increased corrosion protection of pipelines.
FIELD: oil and gas production, particularly for metered corrosion inhibitor, paraffin and salt accumulation inhibitor, as well as demulsifying agent injection in oil well.
SUBSTANCE: method involves performing periodic regent supply in hole annuity of well with the use of proportioning pump. In the case of underground repair of sticky well supply cable of centrifugal pump electric motor is substituted for cable with capillary pipe. The cable with capillary pipe is connected to flow string and is lowered in well. Chemical reagent is injected in well via the capillary pipe to downhole pump inlet or within perforation interval of the well. To provide chemical reagent supply capillary pipe end is connected with polyethylene capillary pipe having design length with the use of connection nipple provided with weighting jet.
EFFECT: provision of guaranteed reagent supply to pump inlet or within well perforation interval, possibility to change class of reagent to be supplied in well and amount of reagent in dependence of well operation parameters.
FIELD: engineering of devices for producing electric energy in pipeline for transportation of gas or close to same, possible use for providing power to equipment used in pipeline or near it.
SUBSTANCE: electric energy production method contains following operations: provision of passage of gas through pipeline for transportation of gas along input section of acoustic resonator, as a result of which standing sound wave is created in resonator; provision of passage of flowing substance located in resonator through penetrable body, formed wherein is a certain number of practically stationary cold spots and/or hot spots as a result of adiabatic expansion or contraction of resonating flowing substance; provision of thermal connection between thermo-electric device and at least one of aforementioned cold spots and/or hot spots for producing electric energy. Thermo-electric generator for realization of method contains acoustic resonator, having input portion, made with possible connection to aperture in wall for pipeline for transportation of gas or in wall of equipment, positioned inside the pipeline, penetrable body, positioned in acoustic tubular resonator, and thermo-electric device, for producing electric energy.
EFFECT: increased efficiency of device for producing energy without limitation of current flowing along the pipeline.
2 cl, 1 dwg
FIELD: oil and gas extractive industry, possible use during operation of wells with anti-corrosive liquid in inter-tubular space, during control of pressurization of cased wells, during control of integrity of anti-corrosive liquid in force wells.
SUBSTANCE: in accordance to method, working agent is forced in, mouth pressure is measured, pressure in inter-tubular space is measured and well parameters are determined. Working agent flow at well mouth is measured. As parameter being measured, volume of anti-corrosive liquid in inter-tubular space is selected, which is computed using analytical formula. Also determined from analytical formula are pressure losses during passage of working agent through well column.
EFFECT: preservation of well operation mode and simplification of measurements, possible determining of volume of anti-corrosive liquid present at current moment in inter-tubular well space.