Combined downhole tool for measurement of side specific resistance and specific resistance of propagation
SUBSTANCE: invention relates to the field of underground survey and production and is intended for measurement of properties of specific resistance of earth formations as they are penetrated through well. Combined tool for measurement of specific resistance includes both antennas of induction/propagation and antennas of side specific resistance arranged in grooves on well pipe. At the same time antenna of side specific resistance includes insulating basic layer arranged in groove, toroidal antenna arranged over insulating basic layer and protective device arranged over groove.
EFFECT: increased accuracy and reliability of measurement of underground specific resistance due to provision of combined measurement of specific resistance, using side sensor and sensor of induction or propagation in one and the same area of bed in a single trip.
18 cl, 20 dwg
The level of technology
The technical field to which the invention relates.
The invention relates in General to the field of subterranean exploration and production. More specifically, the invention relates to a method and device for measuring properties of the resistivity of the earth formations penetrate them through the hole.
The level of technology
Tools logging resistivity for many years was used to measure the resistivity of the earth formations surrounding the borehole. Traditionally resistivity measurements were carried out by lowering a logging device with a wire line into the well after the well was drilled. However, measurements with a wired communication line necessarily lead to a delay between the time when the well is drilled, and the time when the measurements. The preferred approach is to implement such measurements during the drilling process to take corrective steps if necessary. For example, if the borehole is provided in real time, it can be used to make adjustments masses of mud, to prevent damage of the earth formations and to improve the stability of the well. Additionally can be used the data logging of the formations in real-time, to direct the drill bit in the desired direction (i.e. downhole control system of the drilling parameters). On the other hand, if measurements were made after a delay, the drilling fluid, that is, "rock", can penetrate into the reservoir and change the properties of the surrounding areas well. For these reasons, have developed ways of logging while drilling (LWD) and measurement while drilling (MWD). In this description LWD will be used to include both technologies LWD and MWD.
Figa illustrates a conventional system LWD located in the well. Drill string 1 is suspended in the borehole 3 is attached at its lower end the drill bit 5. Drill string 1 and the attached drill bit 5 rotate with the rotary platform 9 during lowering into the well. This causes the penetration of the drill bit 5 into the reservoir 11. As soon as the drill bit 5 penetrates into the reservoir 11, is pumped down the drilling fluid through the Central bore of the drill string 1 to effect the lubrication of the drill bit 5 and transfer drill cuttings through the bottom hole to the surface through the well 3 and line 13 due to the mud. Section collars 15 borax LWD located behind the drill bit 5 and may include a number of sensors 15A resistivity or any other types of sensors known from the prior art. It should be noted that the concept of "Yes, the hunky", used in this description, includes antenna, toroids and electrodes (which can act as transmitters and/or receivers). The sensors 15A resistivity provide measurements of the resistivity of layer 11, which penetrated drill bit 5, providing measurements before drilling fluid will penetrate into the reservoir 11.
In General, there are two types of LWD tools for measurement of the resistivity of layer - side tools and electrodynamic instruments or tools distribution (tools induction or propagation). Each of these tools is based on the principle of electromagnetic (EM) measurements. Tools distribution radiate into the formation of the high-frequency electric field to determine the response of the borehole and the formation, measuring the voltage induced by the receivers, or by measuring the different responses between a pair of receivers or between transmitter and receiver. For example, for tool distribution phase and amplitude of the input signal can be measured at each of several receivers in relation to the phases and amplitudes of the signals used for the excitation of the transmitter. Electrodynamic transmitters generate magnetic fields that induce currents flowing in the formations. These currents generate a secondary magnetic field, which measure the I as inducing a voltage in the antenna of the receiver, located at a distance from the transmitter antenna. Electrodynamic instruments and tools distribution function better in the wells drilled in relatively conductive layers using a relatively non-conductive drilling mud comprising an insulating drilling fluids (e.g. oil-containing drilling muds). Conventional electrodynamic instruments and tools distribution is not configured to permit changes of resistivity around the well.
Standard electrodynamic instruments and tools distribution use wound coil or coils as antennas of the transmitter and receiver. Antennas are placed on the tool, winding the coil around the tool body, sealing it in a conducting filler and then isolating the population rubber. Although electrodynamic instruments and tools distribution typically operate at different frequencies and in some cases are used to explore a variety of underground properties (for example, the definition of dissemination tools dielectric properties of the reservoir), in most cases, they are used in a similar manner to measure the resistivity of the formation. Thus, any reference to the induction here is switching universal notebook is aamoi distribution and Vice versa.
Side tool typically uses one or more antennas or electrodes for insertion into the layers of the low-frequency transverse magnetic fields to determine the response of the borehole and the formation, measuring the current flowing through the layers to the receivers. This technology works best in a relatively conductive layers, in which the drilling with conductive drilling fluids, such as water-based drilling muds. Side tools for resistivity measurements are usually sensitive to azimuthal changes in the specific resistance of the strata around the well.
To transmit a transverse magnetic field in the reservoir side tool typically uses a toroidal transmitter, which is created by winding a conductive wire around the annular magnetic permeable core (toroidal core). To detect currents that flow in the reservoir side, the tool uses the electrode (for example, a ring electrode or a compact disk electrode) receiver or toroidal receiver. In the standard LWD tools toroidal transmitter or receiver are usually provided in the sleeve, which is provided on the drill collar at the final stage.
Figv illustrates a conventional lateral tool for resistivity measurements. As shown, and is of strument includes two transmitter T1 and T2, located on the collar 15 of the drill. Also included two control antenna M0 and M2. Antennas T1 and T2 transmitter (injector current) and control antennas M0 and M2 are shown as toroidal coils, which below will be described in detail. An instrument for measuring the resistivity may also include other electrodes of receivers, such as ring electrode R and a compact disk electrodes b, b'. The ring electrode R and a compact disk electrodes b, b' are conductive electrodes placed on the collar 15, but they are electrically isolated from the collar 15 of insulating materials. The ring electrode R is a conductive metal tape located around the circumference of the collar 15. The ring electrode R usually measures the azimuthal averaged current. On the other hand, a compact disk electrodes b, b' are usually located on one side of the tool. Compact disk electrodes,' allow azimuthal measurements and obtaining images with high resolution.
As mentioned above, the sensors induction/propagation work better in the layers with a relatively low resistivity (or conductivity), drilled with conductive drilling fluids, including oil-based drilling muds. However, such tools are typically not configured to allow and the change of resistivity with azimuthal sensitivity around the well. Side tools are more suitable for the change of resistivity of the strata in which carry out drilling with conductive drilling fluids, and lateral measurements using a compact disk electrodes, usually sensitive to azimuthal changes.
As a side device and electrodynamic device/device distribution works particularly well in certain conditions, they are compatible with each other. However, the driller may lack the necessary information for the correct choice about the type of tool(s) to use for a particular well. Therefore, different types of logging tools are often used together in a separate round-trip uphill logging tool. In operations with a wired communication line side tool often used in one trip-rise with an electrodynamic instrument to ensure that research at a shallow depth and to ensure better identification of areas which penetrates the conductive drilling mud. Run these tools into the well separately is neither operationally profitable or cost-effective. Additionally a separate logging chute-UPS can make inaccuracy when trying to determine the resistivity of a layer to penetration. If this is m also occurs inaccuracy, because the measurement of the signal path in respect to the spacing and geometry of the reservoir varies from one logging flight to another. Consequently, requires the provision of different types of data sources/sensors in the instrument or system for different methods of measurement of the specific resistance.
Example logging resistivity using two types of sensors in a separate instrument, disclosed in U.S. patent No. 5428293 issued Sinclain et al. The logging methods described in this patent, the use of high-frequency and low-frequency sensors to provide measurements at different depths in the research, in order to control the penetration of the drilling fluid. Although these methods require use of the tool, and having high frequency and low frequency sensors on the same drill collar, in that the description was not disclosed details regarding the construction of the instrument.
When designing any sensors for use in LWD tool essential protective devices that can withstand abrasive and harsh environment during drilling. Since the lateral resistivity sensors and sensors of the resistivity distribution function at various EATING principles of measurement, they have different requirements for protective devices. The LWD tools, having an inny resistivity distribution set in recesses in the walls of the collar and provided with protective devices known from the prior art. Configuration tool for disseminating additionally described in U.S. patent No. 5594343, issued to Clark et al.
Figa shows a cross section of a conventional collar 21 drill, equipped for the measurement of the resistivity distribution. The collar 21 includes a recess 29 formed circumferentially around the outer edge of the collar at a given depth. The sensor 25 of the resistivity distribution is located in the recess 29. The collar 21 has an internal sleeve or chassis 26 located therein to form a cavity for accommodating the electronic module 22. The module 22 is attached to the sensor 25 through electrical connection 27 crossing the jumper 28 on the inside wall of the collar 21 borax. The sensor 25 is sealed in the recess 29 (for example, using fiberglass filler 20) and is covered by a rubber molding 19. Protective device 23 is attached on the top of the moulding 19 above the recess 29 to protect the sensor 25 from damage during the drilling process. The collar 21 may also be provided with a removable tape 38 in addition to the protection of the sensor. As shown in figv, protective device 23 includes a plurality of longitudinal slits 24 is filled with an insulating material, the known and the level of technology.
The sensor side of resistivity (i.e. toroidal antenna) induces a magnetic field in the formation. Figa shows the standard sensor lateral resistance, which is described in Bonner et al. "A New Generation of Electrode Resistivity Measurements for Formation Evaluation While Drilling, SPWLA, 35thAnnual Logging Symposium, June 19-22, 1994, Paper 00, and U.S. patent No. 5339037 issued by Bonner et al. Shows the collar 31 LWD. The sensor side of resistivity is constructed as a sleeve 30, which is provided on the collar 31 borax and fixed in place.
Figv shows a magnified side sensor 30 described in the patent Bonner et. al. As shown, the toroidal antenna 35, which includes a conductive wire 33 is wound around the core, embedded in the insulating material 36 and is protected by a metal protective device 37. To allow a transverse magnetic field to be induced in the layer, the protective device to the side of the sensor should not close the circuit. Only one end, the upper end of the conducting protective device 37 is in contact with the collar 31 borax. U.S. patent No. 340856 issued by Redwin et al. describes a toroidal antenna with metal protective outer wall. The proposed toroidal antenna constructed in metal cylinders which are provided above the collar and screwed into the drill collar.
There is a need for a borehole in which the tools, which provide a combined measurement of specific resistance, using both types of sensors resistivity - side type and electrodynamic type/distribution type. It is also preferred that such instruments have sources/sensors built right into the tool.
The invention provides the layout of the elongated tube having a longitudinal axis and configured to underground location, comprising: a recess on the outer wall of the pipe, passing through the peripheral surface around the longitudinal axis of the pipe, the insulating base layer located in the recess;
toroidal antenna located above the insulating base layer, and
protective device located above the recess and is arranged to prevent the passage of electric current along the protective device in the direction parallel to the longitudinal axis of the pipe near the toroidal antenna, with the specified layout of the elongated pipe is a drill collar or the logging tool of resistivity.
With this arrangement of the elongated tube further comprises an insulating filler, located in the remaining area of the recess, the mechanism of compensation of pressure located next to the toroidal antenna. This toroidal EN Enna contains conductive wire, located above the insulating base layer.
In addition, the toroidal antenna includes a toroidal core formed of one of materials: magnetic permeable material, is wound around the insulating base layer of ferrite material located in the recess.
The layout of the elongated tube protective device has an insulating mechanism to prevent the passage of electric current along the protective device in the direction parallel to the longitudinal axis of the pipe, and an insulating mechanism includes a circular slit is filled with an insulating material.
In addition, the layout of the elongated tube further comprises an electrically insulated material, located between the connection formed between the protective device and the pipe.
The layout of the elongated tube according to the first aspect of the invention is a well logging tool of the resistivity or the drill collar.
In this case, when the layout of the elongated tube is a logging tool specific resistance, it contains:
an elongated first conductive tube having a Central hole and an isolated circular hole along its wall to prevent current flow through the orifice;
an elongated second conductive tube having Dutch is to the side of resistivity, mounted on it;
the second pipe is located inside the first pipe so that the sensor side of resistivity was placed near an isolated circular holes on the first pipe, and
moreover, the current path is formed between the first and second pipe on either side of the isolated circular holes, when the second pipe is located inside the first pipe.
Thus between the outer surface of the second pipe and the inner surface of the first pipe formed conductive connections on either side of the isolated circular holes, when the second pipe is located inside the first pipe, with a conducting connection is formed by direct contact between the pipe or by means of a conducting element located between the pipes.
According to the second aspect of the invention provides a method for placement of the sensor side of resistivity on the plot layout pipe having a longitudinal axis and configured to underground location, comprising stages, in which:
create a cavity in the outer wall of the pipe section;
forming a base layer of insulating material in the recess;
form a toroidal core by winding magnetically permeable material on the base layer;
wound navigating the th wire around a toroidal core for the formation of a toroidal antenna and
install a protective device over the recess, while the protective device is arranged to prevent the passage of electric current in the protective device in the direction parallel to the longitudinal axis of the pipe near the toroidal antenna.
Furthermore, the method further comprises the step of filling the remaining area of the recesses with an insulating filler, the adjustment mechanism to compensate the pressure in the hollow.
In addition, according to the method place a bobbin on the base layer before the formation of the toroidal core, and the bobbin has a chute for guiding the winding magnetically-permeable material and place insulating material over the toroidal core in the slot reels.
In addition, according to the second aspect of the invention, the protective device includes an insulating mechanism to prevent the passage of electric current along the protective device in the direction parallel to the longitudinal axis of the pipe near the toroidal antenna while isolating mechanism includes a circular slit is filled with an insulating material in the protective device.
In addition, according to the method of placing an electrically insulating material between the connection formed between the protective device and the pipe.
Other aspects and advantages of the invention will become Acevi is generated from the following description and appended claims.
Brief description of drawings
Figa shows the traditional system LWD downhole tool located in the borehole.
Figv shows traditional logging tool for measuring lateral resistivity.
Figa shows a cross section of a conventional well-logging tool for measuring the resistivity distribution.
Figv represents the schema of the external area of the tool figa.
Figa shows traditional logging tool for measuring resistivity, having placed on the sleeve sensor lateral resistivity.
Figw - detailed view of the sensor lateral resistivity tool according figa.
4 is a diagram of a toroidal antenna, located on the pipe according to the invention.
Figure 5 shows the cross-section of a toroidal antenna, mounted in the recess in the pipe according to the invention.
6 shows a cross section of a toroidal antenna having a bobbin as a guiding device in the recess of the pipe according to the invention.
Figa shows a protective device for the lateral sensor according to the invention.
Figv shows a protective device for the probe resistivity according to the invention.
Fig illustrates a cross-section of the protective device is Ista, located on the pipe according to the invention.
Figure 9 - illustrates a cross-section side of the sensor mechanism with pressure compensation according to the invention.
Figure 10 is a diagram of a pipe with an insulating gap or gap according to the invention.
11 shows the combined lateral sensor and sensor distribution along the pipe and protected built-in protective device according to the invention.
Figa shows the LWD tool and to display the measurements of resistivity, combined with lateral sensor located in the recess of the drill collar according to the invention.
Figw-D presents detailed types of sensors shown in figa.
Fig illustrates a block diagram of the mounting side of the sensor on the pipe according to the invention.
Fig illustrates a block diagram of a method for mounting the combination of a side of the sensor and sensor distribution on the pipe according to the invention.
Embodiments of the present invention relate to methods and apparatus for measuring the electromagnetic properties of underground formations through the well. Embodiments of the invention include instruments that are designed to determine the resistivity in the same region of the reservoir, using both electron gnity sensor - side sensor or induction or propagation. Some embodiments of the invention relate to methods of manufacture or Assembly of such tools. According to variants of the invention, the sensors side type and the sensors distribution jointly implemented in the pipe for underground use. Joint implementation side of the sensor and sensor distribution on one pipe (the pipe layout) makes it possible, if required, use the built-in pipe Assembly of the protective device sensors. More importantly, the implementation of the joint side of the sensor and sensor distribution makes it possible for multimode measurements of resistivity from the same underground area for one descent-ascent, thus providing a more accurate and reliable determination of the subsurface resistivity.
According to variants of the invention, the toroidal sensor for tool lateral resistance is mounted in the downhole pipe. As mentioned above, the toroidal transmitters or receivers traditional instruments for measuring lateral resistivity are usually mounted on the sleeve, which is provided on the pipe. This choice of design is influenced by such factors as, for example, the pressure of physical force on the drill collar with half the features, the complexity of the design and simplification of maintenance or replacement. The study stresses carried out by the present inventors showed that the drill collar having recesses cut in its outer wall, of such size and shape required to hold the toroidal sensors will not significantly weaken the pipe.
Figure 4 illustrates the sensor side of resistivity (toroidal antenna)mounted in a recess in the pipe according to a variant embodiment of the invention. Figure 5 shows a plot of the longitudinal section of a toroidal sensor. As shown in figure 4 and 5, the tube 57 includes a recess 53. The base of the recess 53 is cut at some desired depth. Side sensor, consisting of a toroidal antenna 50, which consists of a magnetic core 51 and the conductive wire 52, is mounted in the recess 53.
According to one variant embodiment of the invention in place of the recesses 53 may be mounted toroidal antenna 50. Toroidal antenna 50 can be mounted in place by placing insulating material in the base of the recess 53 for forming the base layer 55. The insulating base layer 55 may include grooves 56 to provide channels for conducting wire 52 wound around a toroidal magnetic core 51 in the form of a Hoop in the development the AI 53.
Magnetic core 51 is mounted on the base layer 55 in the recess 53. One way is to mount the magnetic core 51 in place in the recess winding a tape made of a ferromagnetic material. Alternative magnetic core may be arranged in the recess of the pieces, made of a ferromagnetic material (e.g. ferrite). The core 51 may be assembled from pieces and soaked in epoxy resin to hold the structure (not shown). An example of a suitable ferromagnetic tape is SUPERMALLOY tape™, which, for example, may have dimensions of 1 inch (2.54 cm) wide and 0.002 inch (0.05 to cm) in thickness. SUPERMALLOY™ is a high purity and specially processed 80% of iron-Nickel alloy for use in the core, wrapped with ribbon, and can be purchased from commercial enterprises, such as Magnetic Metals Company (Anaheim, Ca). SUPERMALLOY™ is made to have a high initial magnetic permeability and low loss. Some applications may not be required magnetic core with high magnetic permeability. May be enough core with a relative magnetic permeability equal to 1. The magnetic tape is wound circumferentially around the insulating base layer 55 for the formation of magnetically permeable toroidal core 51. Winding about algaesia, until it reaches the desired thickness (for example, of 0.10 inches [0,254 cm] to 0.15 inches [0,381 cm]) of the magnetic core 51. To complete the manufacture of toroidal antenna 50, then around the core 51 is wound conductive wire 52. The winding process, for example, ends with the transmission conductive wire 52 through the groove (s) 56, formed in the insulating base layer 55. The sensor side of resistivity can also be implemented in other ways, such as when the slippage sensor in a narrowed region of the pipe or casing (not shown).
Figure 5 also shows that, once completed the installation of a toroidal antenna 50, the remaining area in the recess 53 may be filled with an insulating material 54, which captures the toroidal antenna 50 in the recess 53. Examples of suitable insulating materials include epoxy resin and fiberglass. Optionally, the layer of elastomer (e.g. rubber) may be formed over the insulating material to seal the recess 53 and its contents from the well fluid when placing the sensor in the borehole. Examples of elastomers may include natural and synthetic rubber and synthetic elastomers. An example of a suitable elastomer is a fluoroelastomer sold by DuPont Dow Elastomers under the trade mark VITON™ (Wilmington, Delaware). Rubber and the layer of elastomer 59 seals the Assembly of the sensor, rinsing the surface of the pipe 57. Finally, the recess 53 and its contents are covered by a protective device 58, which protects the sensor from the environment surrounding the borehole. Protective device 58 includes an isolating mechanism 75 (described in detail below) to prevent current flow along the protective device 58 in the longitudinal direction.
6 shows another variant embodiment of the invention. Toroidal antenna is located inside the pipe, comprising a bobbin 67, placed above the insulating base layer 55 before was wound magnetic tape. Bobbin 67 is made of an insulating material and may contain two or more pieces that can be arranged in the recess. Bobbin may include a cut (trench) 68, which directs the magnetic tape during winding and holds the toroidal core 51. For bobbin 67 may be used any suitable material or composite, including commercially available materials such as RANDOLITE™, PEEK™, KEVLAR™, fiberglass, or based on the polyaryletherketones thermoplastic materials as described in U.S. patent No. 6084052 and 6300762. Neckline bobbin 68 67 should be slightly wider than the width of the tape. If you use a bobbin 67, the groove(s) (56 figure 5)used to facilitate the winding of conductive wire 52 may be included in a bobbin 67 instead isolated the existing base layer 55. Once configured the toroidal core 51, the top of the chute 68 bobbin 67 can be closed with a ribbon 69 made of an insulating material, such as fiberglass, for attaching the toroidal core 51 in the notch 68 of the spool 67. Protective device 58, an insulating mechanism 75 and so on (shown in figure 5) is also merged in the embodiment, figure 6, but they are not shown for clarity of illustration. Other embodiments of the invention can be configured without magnetic core 51 (not shown), particularly suitable for high frequency applications. Such embodiments of require the location of the conductive wire 52 on the insulating base layer 55, forming an "air core". In addition, other options for implementation may be configured with a conductive wire wound on a bobbin 67 without magnetic core 51 (not shown).
Returning to figure 5, the protective device 58 is preferably constructed from a durable material such as metal. The importance of a properly configured protective devices known from the prior art. For example, U.S. patent No. 6566881 issued Omeragie et al., discloses various protective devices for electromagnetic logging tools, including tools, having a transverse antenna.
However, the design sasanov the device for solenoidal antenna, which forms the magnetic dipoles differs from the construction of protective devices for toroidal antenna, which forms an electric dipole and operates at much lower frequencies. In the prior art it is well known that the effective functioning of the antenna and the design of protective devices depend on the operating frequency and the physical characteristics of the antenna. As mentioned above, the antenna induction and dissemination is made with the possibility of forming a high frequency electric field in the layer, whereas the toroidal antenna is designed for the formation of low-frequency magnetic field in the formation. Hence, conventional protective devices, design for antennas induction and propagation, usually are not suitable for use in a toroidal antennas.
Floor toroidal antennas traditional protective device antenna will cause a short circuit electric current induced toroidal antenna. Instead of the current flow through the well layer and the first current flows through the protective device. The signal of the reservoir will be reduced below the level corresponding to resistivity measurements. Suitable metal protective device for a toroidal antenna includes a circular slit or ring to provide electrical isolation is s between the protective device and the underlying conductive support. Figa shows a protective device 58 of the invention with an insulating gap 75. This gap 75 is composed of an insulating material (for example, glass, ceramics, RANDOLITE™). It can be located anywhere along the protective device, but it is usually easier to perform the insulating slit 75 at one end of the protective device. Specialists in the art can choose the technology of the many known in the prior art for the formation of cracks. The insulating material may submit a separate piece attached in place or mounted on the protective device (for example, othermany elastomer or composite insulating material) as an integrated part. In some embodiments, the implementation of the insulating material may be placed and maintained by a protective device (not shown).
Alternative included in the protective device slots are the use of one-piece, all-metal protective device and its mounting so that it is electrically connected conductive part of the pipe above the toroid with the conductive part of the pipe under the toroid. The way this is shown on Fig. As shown in Fig, the ring 80 of insulating material 80 is included in the pipe 57 so that one end of the protective device 58 was isolated ring from direct contact with the pipe./p>
Figa and 8 are examples of circular slots or rings with insulating material to prevent current flow along the protective device in the longitudinal direction over a toroidal antenna 50. Specialists in the art will appreciate that can be used in other types of circular slots or rings for carrying out the invention. Some embodiments of the invention may include a segmented metal protective devices to ensure the necessary insulation (not shown).
Specialist in the art will note that, when the pipe is located in a borehole filled with drilling mud, on the toroidal antenna (50 in figure 4) will operate the hydrostatic pressure of 20,000 pounds per square inch (1,406 kg/cm2). This pressure will act on the toroidal antenna 50 from the inside and may cause deformation of the antenna, reducing the magnetic permeability of its core 51 and reducing its inductance and efficiency.
To minimize the adverse effects of hydrostatic pressure toroidal antenna according to the invention can be implemented through the inclusion of a mechanism to compensate the pressure. For example, pressure compensation can be obtained by replacing some or all of the insulating materials (e.g., 54 figure 5), which hold that idalou the antenna in the recess (53 figure 5) on a soft elastomer or rubber. Fig.9 illustrates an implementation option toroidal sensor according to the invention, which includes a mechanism for pressure compensation, the construction of which is similar to that shown in Fig.6. One difference is that in the wall 57 of the pipe is installed the port 90. Another difference is that the fill material 54 is a suitable porous and permeable material, such as not impregnated fiberglass fabric. After rubber 59 is formed at the location, the recess 53 is released through the port 90 and over again is filled with oil at atmospheric pressure. Then the port 90 is sealed by the stopper 91. Rubber gasket 59 acts as a bellows to balance the pressure on the toroidal core 51 with the pressure outside the pipe.
Figure 10 shows another variant embodiment of the invention. In this embodiment, in the conductive outer pipe 57 is made of electrically insulating hole or gap 60, and a toroidal antenna 50 is mounted on the conductive inner tube or chassis 26, located on it. The gap 60 forms an open circuit, the current flowing along a pipe, preventing the flow of current through the gap 60. On either side of the gap 60 is formed by a conducting connection 61 between the pipes to provide a current path between the pipes. Figure 10 illustrates a variant embodiment of the invention, in which electrically the United States connection 61 between the pipes are implemented by pulling the outer side of the chassis 26, providing direct contact with the inner surface of the outer tube 57. Can be used with other suitable means for providing a current path between the tubes, as is known from the prior art. For example, between the pipes can be installed wave spring for providing a conductive element (not shown). Electronic module for the antenna 50 can be located in the pipe, as described herein or using other means known from the prior art.
When working toroidal antenna 50 forms a current loop in which the current flows through the chassis 26 and the outer pipe 57, returning to the outer tube through the seam. Thus, embodiments of the invention, comprising an insulating gap 60, typically include more than one gap, one for forming a voltage differential across the pipe and the other to measure the axial current, using the other toroid, functioning as a receiver. Downhole pipe made with insulating breaks or cracks, known in the oil industry, more precisely, in the field of telemetry. U.S. patent No. 6098727 issued by Ringgenberg et al., describes borehole tube with insulating slits. On the outer region of the outer tube can also be placed protective device over the insulating gap 60 to protect the slot from the environment and further isolate the gap from PA is uzitnych currents in the borehole (not shown). This protective device can be formed from any suitable insulating material and is located on the tube, as is known from the prior art.
This design offers several advantages: the antenna is mechanically protected by the pipe; the toroid is not exposed to the direct pressure of the borehole, so that the core material retains a higher magnetic permeability and can be avoided supply and wiring through the outer pipe. There is also the advantage over the direct management of the slit, because you do not want the chassis 26 was isolated from the pipe 57, which may be difficult in some areas, such as around the sealing zones between the chassis and the pipe.
Side antenna located in the pipe, has similar characteristics with the characteristics of the antenna induction. With these different types of sensors are combined in one tube, the tool can be used for resistivity measurements of the same subsurface region, using two different detection technologies. Additionally it is possible to install a built-in protective device sensor to protect the sensor. Note that along with the fact that in some cases it is necessary to have a built-in protective device for individual sensors can be used separate protective condition the device.
11 shows another variant embodiment of the invention. The view is a cross-section of the pipe with the sensor 104 lateral resistivity, formed in the first recess 53 cut in the pipe wall, and the sensor 105 resistivity distribution formed in the second recess 103 cut in the pipe wall. Electrical connectors 27 crossing the jumper 28 in the wall 57 of the pipe, electrically connect the sensor 104, the lateral resistivity sensor 105 distribution with the electronic module 102 is placed in the chamber formed in the chassis 26. O-rings or other sealing means known from the field of technology are used to ensure that the module 102 is not exposed underground fluids.
11 also shows a built-in antenna distribution and protective device 108 toroidal antenna attached circumferentially around the outer wall of the pipe. Built-in protective device 108 may be mainly made of metal and may be bolted, screwed, welded or attached to the outer surface of the pipe, using any suitable means known from the prior art. In some embodiments, the implementation of the built-in protective device 108 may be constructed from other durable Nemeth is lychesky materials, known in the art. However, metal is the preferred material in LWD applications, thanks to its strength and durability. Built-in protective device 108 includes one or more longitudinal slots 24 on the second recess and the sensor 105 distribution. In this embodiment, the insulating slit 75 for a protective device 108 formed in the wall of the pipe near side sensor 104 using any suitable insulating material known in the prior art. Other options for implementation may be implemented with the sensor 104, the lateral resistivity sensor 105 resistivity distribution, located in the same recess (not shown). Such an implementation option can be implemented by pulling the recessed placement of both sensors and using the built-in protective device 108.
As indicated above and shown in Fig, protective device toroidal antenna may be a metal module that provides the Assembly of the protective device/pipe, adapted to prevent current flow along the protective device through the toroid. Figure 11 the design of the insulating slit or ring 75 and the protective device ensures that near to the sensor 104 lateral resistivity prevents current flow along the protective the disorder. Alternative circular slit may be made in the protective device, as shown in figa.
As discussed above, a conventional antenna distribution induce electric fields, which cause the flow of electric currents around the circumference of the support pipe in the well and the reservoir. Therefore, antenna distribution typically use a protective device having a longitudinal slit to prevent the induction of transverse (azimuthal) currents in the protective device instead of the reservoir. Figv shows one example of a protective device 58' with slots 76, filled with an insulating material that can be used to protect the antenna distribution according to the invention.
Such protective devices are additionally described in U.S. patent No. 4968940. It should be noted that, although shown more slots 76, embodiments of the invention are not limited to any particular number or shape of the slits. Other variants of implementation can also be implemented with the segment protective devices (not shown).
Embodiments of the invention, illustrated above, can have any number of sets of sensors spread or side sets of sensors disposed along the pipe axis. Additionally you can select any set location depending on the specific depth of the surveys or the desired vertical resolution.
The methods according to the invention allows to form a toroidal antenna in a recess in the pipe, adapted to underground use. Applications of these methods are not limited to tools for resistivity measurements described here. For example, tools or device that you currently use toroidal antenna located on the sleeve and attached thereto, can benefit from the presence of the antenna, built in recess or cavity. Fig shows another variant embodiment of the invention. Figa shows a variant implementation of the tool for GeoVision resistivity measurements, produced under the trademark GVR™ Corporation Schlumberger Technology (Houston, Texas).
As shown in figa, toroidal antenna 112 is formed in the recess (as described here) on the section of the collar 111 borax. Figv shows a toroidal antenna 112 in more detail. The instrument also includes four large disk electrode 114 to provide azimuthal measurements of resistivity (shown in more detail in figs). The tool additionally includes a sequence of compact disk electrodes 116 located on a removable stabilizer, to provide measurements with high resolution (shown in more detail in fig.12D). Variations the t GVR tool shown in Fig, can be implemented in the "smooth" design, without a stabilizer. In a smooth configuration of the device is considerably smaller in diameter compared to the real GVR tool, because the toroidal antenna are formed in recesses in the wall of the collar in contrast to slip on the drill collar. The smooth tool is easier to maneuver in rejected or drastically deviated wells, and he has the best hydraulics.
Embodiments of the invention relate to a method for placing the sensor side of the resistivity at the site of the elongated tube adapted for underground placement. Fig characterizes a block diagram of a method. Initially, a deepening of the correct depth or cut on the outer wall of the pipe section (step 121). The depth should be sufficient to accommodate the antenna Assembly, but not too deep against excessive weakening of the pipe. First, it may be executed study of stresses, to determine, to achieve whether the required depth without excessive weakening of the pipe.
Next, on the base of the recess is placed (or coated with) an insulating material for forming the insulating base layer between the toroidal antenna and the conductive pipe (step 122). Can be used in a variety of insulating materials known from the level of the techniques I, including fiber, PEEK™, etc. the thickness of the base layer of insulating material should be selected to ensure adequate insulation without excess growth. For example, a layer of 0.04 inch (1.0 mm) glass fiber can be used as a base layer. The mechanism of compensation of the pressure may be built on the base layer to support the toroidal antenna.
The toroidal core is formed in the recess of the base layer, using magnetically-permeable material such as SUPERMALLOY tape™ (step 123). The ribbon of the appropriate size is used depending on the required dimensions of the toroidal antenna. For example, can be used Permalloy having a size of one inch (2.54 cm) in width and 0.02 inch (1.0 cm) in thickness, for winding the core, having a thickness in the range from 0.1 inch (0,254 mm) to 0.15 inches (0,381 mm). In some embodiments, the implementation can use a bobbin made of an insulating material, for guiding the winding process of the tape. Suitable bobbin, for example, can be made of fiberglass and have a notch or cut-out (for example, 1.05 inches (2.7 cm) in width and 0.18 inch (0.5 cm) in depth), which can be aligned with the width of the tape. When using the reel upper side of the bobbin may be covered with insulating material (for example, an insulating tape or what steklotkani), to capture the toroidal core in the groove of the bobbin and to isolate the wound.
Once formed toroidal core covered with a conductive wire is wound or wrapped around the core to complete the antenna (step 124). Suitable conductive wire, for example, is HMN wire with a magnetic coating. In order to facilitate the winding of the wire on the base layer or the reel can be cut grooves to provide channels for the wires.
The remaining space in the recess can then be filled with an insulating material. Suitable insulating material, for example, may be selected from epoxy resin, fiberglass, etc. Insulating filler will keep toroidal antenna in place and also isolates the antenna from the conductive drill collar. The layer of rubber or elastic material may also be formed above the upper part of the insulating material and the pipe to germetizirovany the whole layout of the antenna from the borehole fluids. On the stage 121 may be provided with a recess with bunk or stepped profile depth (see, for example, 5, 6, 8)to facilitate the forming of a layer of rubber on the same level with the surface of the pipe. Suitable elastic materials include fluoroelastomer sold by DuPont Dow Elastomers under the trade mark VITON™ (Wilmington, Delaware). Otnositel the thin layer of rubber or elastic (for example, of 0.05 inch [1.3 mm] in thickness) ensures a reliable seal.
Finally, on deepening can be placed protective device to protect the layout of a toroidal antenna (step 125). As noted above, the protective device is preferably metal. The arrangement of the protective device is adapted to prevent the passage of electric current in the area of the toroidal antenna between the pipe sections above and below the antenna (i.e. in the direction parallel to the longitudinal axis of the pipe). Electrical isolation may be provided with a circular slit is filled with an insulating material located in or on the protective device, or the connection between the protective device and the pipe, as described above.
Fig is a flowchart illustrating the method of Assembly of the tool for resistivity measurements using an elongated pipe adapted to underground placement according to the invention. The method begins with placing the sensor side of resistivity in the recess in the pipe, as described herein (step 131). Antenna resistivity induction and distribution also located on the pipe, as described herein (step 132). Antenna side of resistivity can be configured according to those disclosed in the descriptions of the technologies. Antenna induction/RA the proliferation and the electrodes can be configured using known from the prior art methods. In preferred embodiments, the implementation of lateral resistivity are located in close proximity to the sensors distribution, so that they could measure basically the same vertical area of the reservoir at the same time. Other options for implementation may include multiple sets of sensors lateral resistivity and antenna resistivity induction/propagation. The number and placement of these sets is configured to provide a measurement at the desired depth research.
In conclusion, the composition of the protective device is mounted on the pipe for closing and protecting the sensor side of resistivity (step 133). For sensor lateral resistivity can be used personal protective device, or can be used built-in protective device to protect multiple antennas. The arrangement of the protective device must be adapted to prevent flow of electric current in the sensor zone between the pipe sections above and below the sensor (i.e. in the direction parallel to the longitudinal axis of the pipe). Electrical insulation is provided, as described here, depending on the antenna type.
Benefits of the choices made is tvline of the present invention, include efficiency, versatility and accuracy. This invention enables the production of a double set of both types of sensors resistivity on one downhole tool located close to each other. Because different types of sensors can be located close to each other, minimizing the introduction of measurement error due to the offset of the depth, different times of logging and the different geometry of the signal path.
Specialist in the art will appreciate that the present invention offers additional advantages, including dual resistivity measurements, which are suitable for different but partially overlapping logging needs. Reliability of measurements of lateral resistivity is also greatly improved, because the sensors are provided on the pipe and adequately protected to ensure higher durability, in particular, when logging operations. Forming a side of the sensor in the recess in the pipe also reduces the diameter of the instrument for measuring the specific resistance and extends the range of sizes of the holes and bend the wells, which can be used downhole tool.
Improved efficiency is achieved due to the longer time of the descent-ascent, at that time what I like sensors work well together less often. In addition, reduction of wear and damage frequencies of the sensors leads to lower cost of maintenance. Because both types of sensors formed in a similar manner and on the same downhole tool, the manufacturing costs are also reduced.
Although the invention has been described for a limited number of realizations, specialists in the art will appreciate that can derive other embodiments of which do not depart from the scope of the invention. For example, the toroid according to the invention can be located on the downhole pipe for use as a damper to prevent current flow in the pipe, to reduce interference signal. The present invention can be used in all areas of the oil industry, including LWD, wired communication line, drilling on the flexible tube, the fastening of the well casing during drilling and control tanks. Also will be appreciated that embodiments of the invention can be implemented with any conventional antennas propagation and induction, including having a tilted axis or multiple coils.
1. The layout of the elongated tube having a longitudinal axis and configured to underground location, comprising:
the recess on the outer wall of the pipe, passing what about the circumferential surface around the longitudinal axis of the pipe,
the insulating base layer located in the recess;
toroidal antenna located above the insulating base layer; and
protective device located above the recess and is arranged to prevent the passage of electric current along the protective device in the direction parallel to the longitudinal axis of the pipe near the toroidal antenna
this elongated tube is a logging tool resistivity, containing:
an elongated first conductive tube having a Central hole and an isolated circular hole along its walls, to prevent current flow through the orifice;
an elongated second conductive tube having a sensor lateral resistivity installed on it;
the second pipe is located inside the first pipe so that the sensor side of resistivity was placed near an isolated circular holes on the first pipe; and
moreover, the current path is formed between the first and second pipe on either side of the isolated circular holes, when the second pipe is located inside the first pipe.
2. The layout of the elongated tube according to claim 1, additionally containing an insulating filler, located in the remaining area of the recess.
3. The layout of the elongated tube according to claim 1, the more the tion containing the mechanism of compensation of the pressure, located next to the toroidal antenna.
4. The layout of the elongated tube according to claim 1, in which the toroidal antenna includes a conductive wire located above the insulating base layer.
5. The layout of the elongated tube according to claim 1, in which the toroidal antenna includes a toroidal core formed of one of materials: magnetic permeable material, is wound around the insulating base layer of ferrite material located in the recess.
6. The layout of the elongated tube according to claim 1, in which the protective device includes an insulating mechanism to prevent the passage of electric current along the protective device in the direction parallel to the longitudinal axis of the pipe.
7. The layout of the elongated tube according to claim 6, in which the isolating mechanism includes a circular slit is filled with an insulating material.
8. The layout of the elongated tube according to claim 1, additionally containing an electrically insulated material, located between the connection formed between the protective device and the pipe.
9. The layout of the elongated tube according to claim 1, with the specified layout of the elongated pipe is a drill collar.
10. The layout of the elongated tube according to claim 1, in which between the outer surface of the second pipe and the inner surface of the first pipe formed Prov is coming connection on either side of the isolated circular holes, when the second pipe is located inside the first pipe.
11. The layout of the elongated tube of claim 10, in which a conductive connection is formed by direct contact between the pipe or by means of a conducting element located between the pipes.
12. The way of placing the sensor side of resistivity on the plot layout pipe having a longitudinal axis and configured to underground location, comprising stages, in which:
create a cavity in the outer wall of the pipe section;
forming a base layer of insulating material in the recess;
form a toroidal core by winding magnetically permeable material on the base layer;
wound conductive wire around a toroidal core for the formation of a toroidal antenna; and
install a protective device over the recess, while the protective device is arranged to prevent the passage of electric current in the protective device in the direction parallel to the longitudinal axis of the pipe near the toroidal antenna, in addition place a bobbin on the base layer before the formation of the toroidal core, and the bobbin has a chute for guiding the winding magnetically permeable material.
13. The method according to item 12, optionally containing this is filling the remaining area of the recesses with an insulating filler.
14. The method according to item 12, which additionally contains an adjustment mechanism to compensate the pressure in the hollow.
15. The method according to item 12, optionally containing placing an insulating material over the toroidal core in the slot reels.
16. The method according to item 13, in which the protective device includes an insulating mechanism to prevent the passage of electric current along the protective device in the direction parallel to the longitudinal axis of the pipe near the toroidal antenna.
17. The method according to clause 16, in which the isolating mechanism includes a circular slit is filled with an insulating material in the protective device.
18. The method according to item 12, optionally containing placing an electrically insulating material between the connection formed between the protective device and the pipe.
SUBSTANCE: invention refers to mining and can be implemented at open development of mineral deposits by non-transport system in complicated mining and geological conditions. The stripping aggregate consists of face and dumping non-rotary carrier platforms with masts interconnected with two running cables, and of a double-sided bucket with a bottom of V-shape coupled with each mast by means of a lift-and-drag cable enveloping a corresponding block installed between the running cables. The block of the face non-rotary platform is rigidly tied with the first running cable and is connected to the second running cable; it travels along this cable relative to the block of the non-rotary dumping carrier platform together with the second running cable. The block of the dumping non-rotary platform is rigidly tied with the second running cable and is connected to the first running cable; it travels along this cable relative to the block of the non-rotary face carrier platform together with the first running cable.
EFFECT: raised efficiency of stripping aggregate and reduced wear of cables.
SUBSTANCE: invention refers to mining and can be implemented in open pits of mineral deposits for transporting excavated mass. The method consists in communicating horizons with a carrying flexible link, in securing capacities to the flexible link; also these capacities can freely travel; in connecting the capacities with a flexible pulling link, in equipping it with a balloon, and in loading capacities at final horizons. Also unloading of capacities is performed at intermediary horizons situated between stations of loading of upper and lower horizons, notably, the distance between stations of loading and unloading of each horizon is uniform; the balloon is fastened to the capacity of the upper horizon; lifting of excavated mass is performed from the lower horizon by means of aerostatic force of the balloon, while lowering excavated mass from the upper horizon is performed by means of gravitation force of excavated mass of the upper horizon and empty lower capacity. Also there is suggested the device for implementation of the method.
EFFECT: facilitating transporting excavated mass from hard accessible places with narrow slopes.
2 cl, 1 dwg
SUBSTANCE: invention relates to mining, in particular, to navigation system of combined cutter-loader intended for operations in open-pit bench. This mining equipment includes a combined cutter-loader, a conveyor assembly, and a steering assembly, which joins said combined cutter-loader and conveyor assembly. In addition, this equipment includes a course sensor and a steering device, which is sensitive to signals from said course sensor. The first drive is located in combined cutter-loader, in conveyor assembly, or in steering assembly. The first drive is placed on one side of combined cutter-loader centreline. In addition, the second drive is located either in combined cutter-loader, or in conveyor assembly, or in steering assembly. The second drive is placed on another side of combined cutter-loader centreline. The first and the second drives are used to adjust angle of joint between combined cutter- loader and conveyor assembly on either side of parallel line in order to keep pre-defined direction of combined cutter-loader advancing.
EFFECT: precise driving of combined cutter-loader in order to increase coal cutting from mining zone.
22 cl, 13 dwg
FIELD: engines and pumps.
SUBSTANCE: invention relates to excavator electrical drives and allows increasing the service life of traction motors. The transfer station electrical drive is designed to provide for transfer of excavators and drilling machines in open pits with the power supply cable disconnected from the supply circuit. The proposed device is a separate electrical drive per every traction motor configured as a "generator-motor" assembly controlled by the PPD-1.5V-type power magnetic amplifier.
EFFECT: longer life of the motor.
FIELD: mine winding plants, particularly to lift skips and cages from deep mines and pits.
SUBSTANCE: tractive tool is made as flexible flat band having trapezoid shape and constant thickness. Flexible flat band width varies in accordance with predetermined algorithm. The band has minimal width in area of band connection with lifting tank.
EFFECT: possibility to increase winding plant capacity for reduced tractive tool weight value.
2 cl, 4 dwg
FIELD: mining, particularly to perform stripping and mining in pits with 6-8 crushing index.
SUBSTANCE: method involves filling previously created trench with rock loosened with milling machine, wherein loosened rock is poured in the trench from which said rock had been excavated. In the case of conveyer deactivation device usage rock is left in open trench just after rock cutting with milling means. After that rock is scooped with scrapers following pit machine without pit machine stopping.
EFFECT: increased open-pit work efficiency due to decreased milling machine downtime during rock mining.
2 cl, 1 ex, 4 dwg
FIELD: opencast mining; quarry transport.
SUBSTANCE: invention relates to systems of quarry transport, namely, to device for lifting and lowering of dump trucks into quarries at opencast mining. In proposed device line for lowering dump trucks into quarry is arranged in parallel to dump lifting line, and drive sprockets in head and middle parts of both lines are provided which are mechanically intercoupled. Each dump truck gripping and handling device is made in form of twin levers with rolls on free ends hinge-attached to two plate-and-roll chains. Twin levers are interconnected by platform for front wheels of dump truck. Each platform of lifting line is provided with two hollow guides of rectangular cross section rigidly attached symmetrically and normally to surface of run. With possibility of free arrangement and displacement of rectangular cross section rods for engagement of lower ends of rods with surface of run at normal operation of device and with wall of cavity in case of tear off of pull chains.
EFFECT: provision of holding of loaded dump trucks on lifting line at breakage of pull chain.
FIELD: quarry transport.
SUBSTANCE: invention relates to complexes for lifting and lowering dump trucks into quarry at opencast mining. Proposed complex consists of inclined section and adjoining horizontal sections in upper and lower parts of complex. Line for lowering dump trucks into quarry is arranged in parallel to dump truck lifting line. Both lines are mechanically coupled by drive sprockets in head and middle parts of both lines, gear ratio being 1. Each device for gripping and transporting dump truck upwards and downwards is made in form of twin levers hinge connected to two leaf and roll chains, levers being arranged between chains. Said twin levers are connected by platform for fitting rear wheels of dump truck on lifting line and front wheels, on lowering lines. Said platform are arranged with clearances over tracks. Each platform is provided with curvilinear stop for wheels. Devices for catching torn off pull chains are arranged on inclined section at equal pitch. Each said chain catching device is made in form of U-shaped shoe secured by brackets in upper part of guide for running rolls of pull chain and arranged over pull chain with its height increasing in direction of pull chain movement. Bus is installed under pull chain within minimum clearance of guide for twin lever rolls, and wedge is freely fitted inside shoe on pull chain for thrusting against front wall of shoe at normal operation of complex and for wedging between shoe and pull chain at change of direction of movement of broken pull chain. Additional sprockets are installed on lifting and lowering lines for engagement with upper runs of pull chains. Axles of said sprockets are mechanically intercoupled by gear pair, gear ratio 1.
EFFECT: provision of continuous transportation, brought to minimum metal usage and consumption of power when lifting and lowering dump trucks.
FIELD: mining industry, namely, high capacity (with load capacity over 40 tons) loading and transporting machines for underground and open mining operations.
SUBSTANCE: loading and transporting machine includes loading tool, consisting of bucket with impact teeth, boom and controlling hydro-cylinders, driving mechanism and force plant. Frontal wall of bucket is made with part extending beyond its side walls shaped as isosceles triangle or shape close to that for distance not less than 1/3 of its total length. Working edge of frontal wall of bucket is formed by even sides of triangle. Impact teeth are mounted along the axis of front wall, near side walls and with step of 3÷5 of width of impact tooth. Back wall of bucket is made inclined relatively to front wall at an angle more than 90°.
EFFECT: increased efficiency of machine operation due to lowered resistance of insertion of bucket into stack of rock.
6 cl, 2 dwg
FIELD: mining, particularly to excavate, transport and stack of barren rock and mineral at placer, marine (off-shore) and bedded deposits.
SUBSTANCE: device comprises scraper, movable trestle arranged between guy ropes with movable blocks. Device also has scraper winch with head and end ropes arranged on the movable trestle. The scraper winch includes two drums with head and end ropes arranged on the drums. The ropes pass over pulleys fastened to movable trestle top. Installed on movable trestle is tension winch provided with tension cable passing over pulley. The second end of tension cable is fastened to the movable trestle. The end rope of the scraper and the tension cable are correspondingly connected with guy ropes by means of blocks associated with movable blocks of guy ropes through collars.
EFFECT: decreased costs of device production, increased output and decreased rock mining costs.
SUBSTANCE: method and system for description of pyrobitumen gradients in reservoir bed of interest and analysis of properties of reservoir bed of interest on the basis of such pyrobitumen gradients. Analysis uses correlation, which connects concentration of insoluble pyrobitumen with data of spectrophotometric measurements, taken at depth.
EFFECT: invention provides for accurate determination of separation or uneven distribution of carbohydrate in reservoir bed of interest.
20 cl, 5 dwg
FIELD: oil and gas production.
SUBSTANCE: test bench consists of rigid frame including vertical rods attached to upper and lower cross bars, of case for core sample holder equipped with upper and lower covers, of upper and lower puncheons, ends of which have channels for flow of fluid in axial and radial directions, and of vibration exciter of non-harmonic electro-magnetic oscillations (EMO) of different pulses in each two neighbour time half-period. A working cylinder with a piston is installed inside one of the cross bars. A stop installed between the upper movable puncheon and the piston, a model of analysed oil reservoir (MSOR) and the lower stationary puncheon function as a wave conductor of EMO. The wave conductor is electrically disconnected from the case of the core sample holder. Also the case of the core sample holder includes a circular cavity enveloping the MSOR. A hollow polyhedron is positioned inside the circular cavity on a lower cover of the core sample holder; electric dipoles inserted one into another are arranged on each of internal facets of the polyhedron parallel to vertical axis of the MSOR. The dipoles are connected with an EMO mode unit via electric inputs installed in the lower cover of the core sample holder.
EFFECT: increased oil and gas yield due to generation of additional factor effecting oil ions constituting residual oil in analysed samples.
4 cl, 6 dwg
FIELD: measurement equipment.
SUBSTANCE: invention relates to analysis of the geological stratum fluids in the well for estimate and inspection of the stratum for the purposes of investigation and development of hydrocarbons production wells. The method and devices for analysis of stratum fluids in a well by way of separation (selection) of fluids from the stratum and/or borehole in the assembly for regulation of pressure and volume which is integrated into the flow line of the fluid analysis module and definition of isolated fluids characteristics. The required parametres may be deducted for stratum fluids in the static state and the undesirable stratum fluids may be drained and substituted with stratum fluids suitable for definition of characteristics or extraction of samples to the surface. The selected stratum fluids may be subject to circulation in the flow line circuit for definition of phase behaviour characteristics. Real time analysis of fluids may be performed under or almost under well conditions.
EFFECT: creation of method for analysis of stratum fluids in well by way of selection of fluids from the stratum and/or borehole into the analyser module flow line.
21 cl, 10 dwg
FIELD: oil-and-gas industry.
SUBSTANCE: proposed device comprises test chamber, appliance to displace fluid, pressure device and at least one transducer. Test chamber makes a fluid receiving estimation chamber. Appliance to displace fluid comprises drive to act on fluid to make it displace inside said test chamber. Pressure device continuously varies fluid pressure.
EFFECT: accurate real-time analysis inside borehole.
27 cl, 8 dwg
FIELD: engines and pumps.
SUBSTANCE: method involves introduction of common flexible tubing string to the well bore with annular space formed around flexible tubing string; activation of the device for separation of zones for isolation at least of one well bore zone; direction of test fluid medium to well bore through flexible tubing string to location place above the aforesaid zone; removal of outlet fluid medium from isolated zone and test fluid medium from flexible tubing string through annular space; measurement of characteristic of flow rate and pressure of outlet fluid medium during discharge.
EFFECT: isolation and test of separate zones without removing operating tubing string.
20 cl, 15 dwg
SUBSTANCE: method includes geophysical surveys of wells, identification of filtration-capacitance properties in core (Kp - porosity, Kper - absolute permeability) of rocks opened by well, processing of all the information obtained with assessment of geological properties and further extraction of collector intervals. Rock is modeled as a structural frame with various dimensions of porous channels that shape pore space. Using above-mentioned representations, shape of rock geological properties reflection is determined into its petrophysical properties depending on values of pore radiuses and ranges of porosity variation, petrophysical models of rock geological properties reflection are established. In process of geophysical surveys of well cuts rock porosity (Kp) is defined in open boreholes. Based on application of petrophysical models of rock geological properties reflection, absolute permeability (Kper) is calculated in each well for each bed, taking into account geometry of pore space of rock, which is an index of structural-mineralogical heterogeneity of geological medium, its filtration-capacitance properties, absolute and phase permeability.
EFFECT: detection of geological properties of terrigenous rocks.
1 ex, 1 tbl, 4 dwg
FIELD: oil-and-gas industry.
SUBSTANCE: invention relates to field-geophysical analysis and can be used for visual control of well walls. Proposed device comprises TV camera with TV receiver interconnected via cable that moves up and down the well driven by special device arranged on top circular platform arranged to rotate in horizontal plane on bottom circular platform and aligned with it. Bottom platform is arranged aligned with the well and rigidly fixed at its mouth. Bottom circular platform upper surface accommodates reversing motor coupled via reduction gear with top circular platform and, via its control input, with reversing motor control unit. TV camera carries light source and laser radiator directed towards well mouth and furnished with optical adapter to transform laser beam projection point into light line passing along bottom circular platform radius to central photo receiver arranged on bottom circular platform edge. LH and RH photo receivers are arranged in symmetry with central photo receiver of the right and left of it. Said receivers are connected to appropriate inputs of control unit that control sense of rotation of aforesaid motor.
EFFECT: constant orientation of produced well wall image with respect to cardinal points.
FIELD: oil and gas industry.
SUBSTANCE: for this method, containing method of sample sampling of fluid in point of sampling, analysis of physical and chemical properties of fluid sample in sampling point, recordings of sample properties in point of sampling into archive of electronic data base, analysis of physical and chemical properties of sample of fluid in place remote from point of sampling, recording of sample properties in remote place into archive, checking of fluid sample fitness be means of comparison of properties in point of sampling and sample properties in remote place and recording of properties of checked for fitness of sample into archive.
EFFECT: providing of method of reliable and qualitative sample of fluid and improvement of data quality, controllability and conformity of data about fluids parametres.
32 cl, 4 dwg
FIELD: oil and gas industry.
SUBSTANCE: group of inventions relates to packers used during sampling of strata fluid medium and includes method of sampling and device for its implementation. Unit of inflatable packer contains one extensible tubular member with couple of annular dead-end poles, herewith one of supports is movable and the other is fixed on mandrel. Also at this packer it is annular fixing unit, developed from one of dead-end poles for reinforcement of tubular member during creation in it of pressure and its extension. Annular fixing unit contains multitude of plates, pivotally connected to support. Unit can contain the second similar extensible tubular member and the second annular fixing unit. Unit can contain between tubular members centraliser. Movable dead-end pole can allow directed inside surface, area of which increases area of directed outside surface. Method of development of couple of inflatable packers includes creation of pressure in packers, sampling of medium in interpacker space, pressure release for replacement of packers' unit, restriction of packer deformation at stage of pressure creation with usage of annular fixing unit.
EFFECT: reliability growth and increasing of durability of inflatable packers, simplification of process of its pacling and transaportation.
12 cl, 12 dwg
FIELD: oil and gas industry.
SUBSTANCE: invention refers to well survey, particularly to procedures of underground reservoir estimation by means of downhole instrument. For this purpose a viscosity gage-densimetre for a downhole tool is arranged in well borehole drilled through an underground reservoir. The downhole tool is designed for supply of at least a portion of reservoir fluid into the viscosity metre-densimetre. The viscosity metre-densimetre consists of a sensitive block and of a design diagram for calculation of at least two parametres of fluid, notably, viscosity and density. The sensitive block is located inside the downhole tool and contains at least two distanced in space connectors, a string suspended with tension between the connectors, and at least one magnet generating magnetic field interacting with the string. The string interacts with reservoir fluid when the viscosity metre-densimetre is inserted inside the downhole tool, and the downhole tool is located in the underground reservoir and intakes fluid from the underground reservoir. The connectors and the string are made out of materials with similar ratios of heat expansion and form a frequency oscillator.
EFFECT: increased reliability of device operation in well; upgraded accuracy of measuring parametres of reservoir in well.
18 cl, 17 dwg
FIELD: oil and gas extractive industry.
SUBSTANCE: method includes picking a sample of bed fluid under pressure by means of pump. Sample of fluid is then compressed by moveable piston, actuated by hydrostatic pressure in well through valve. Compressed sample of bed fluid is contained under high pressure inside the chamber with fixed volume for delivery to well surface. Moveable piston is in form of inner and outer bushings, moveable relatively to each other. At the same time several tanks for picking samples from several areas may be lowered into well with minimal time delays. Tanks may be emptied on well surface by evacuation pressure, to constantly provide for keeping of pressure of fluid sample above previously selected pressure.
EFFECT: higher reliability.
6 cl, 14 dwg