Complex instrument for specific resistance electrode measuring and electro-magnetic distant measuring

FIELD: oil and gas industry.

SUBSTANCE: complex instrument includes loaded drilling pipe that consists of the first and the second part separated by isolated gap, and distant-measuring cartridge containing distant measuring scheme that includes power source generating voltage drop at isolated gap, and axle current at drilling column that is returned through geologic bed, it also includes isolated measuring electrode connected to the first part and scheme for specific resistance measuring connected in the course of operation to measuring electrode and distant-measuring scheme.

EFFECT: integration of possibilities to measure specific resistance into electro-magnetic distant-measuring instrument and obtaining the data of specific resistance as well as distant measuring.

58 cl, 11 dwg

 

The technical field to which the invention relates

The present invention relates generally to operations in the wellbore, and in particular to methods and apparatus for integrating measurements of resistivity in the electromagnetic ("EM") telemetry tool.

Description of the prior art

During operations, drilling of borehole information on the geological formations and the position of the BHA ("BHA")that are often needed for effective and efficient drilling of the wellbore. Thus, in many wells, the layout of the bottom of the drill string is equipped with an electromagnetic telemetry tool for measurement while drilling ("MWD"). These tools MWD create current in the surrounding rock and through telemetry schemes reported telemetric information relating to the BHA. This information is important to control the trajectory of the wellbore and the successful placement of the wellbore relative to the desired reservoir.

In addition to the telemetry data it is often necessary to have information about the reservoir for accurate placement of the wellbore. In practice, the logging tool, such as tool resistivity measurements, is lowered into the wellbore to obtain information that can be used for the automatically recognized a particular layer. Currently, information about resistivity get, omitting a separate logging tool in the wellbore to obtain the required information. Conducting logging operations separately from drilling operations significantly increases the cost of drilling operations. In some cases, additional costs are justified. However, in other cases the costs are not justified, and the operator has to control the trajectory of the wellbore based on the limited information about the layer.

The invention

In view of the foregoing and other considerations provided by the device and means to integrate the capabilities of resistivity measurements in the EM telemetry tool and retrieve data as resistivity, and telemetry.

According to a variant implementation of the present invention, an integrated tool for electrode resistivity measurements and EM telemetry, with heavy-weight drill pipe, comprising a first part and a second part separated by an insulated gap, and telemetry cartridge bearing telemetry circuit including a voltage source generating a voltage drop across the insulated gap, and the axial current on the drill string, which is returned through the geological formation includes a stand-alone measure concentration of the nutrient electrode, connected to the first part, and a circuit for measuring the specific resistance during operation is connected to the measuring electrode and telemetry scheme.

According to a variant of the method of obtaining the resistivity of the formation using electromagnetic telemetry tool for measurement while drilling with heavy-weight drill pipe, comprising a first part and a second part separated by an insulated gap, and telemetry cartridge bearing telemetry circuit including a voltage source generating a voltage drop across the insulated gap, and the axial current on the drill string, which is returned through the geological formation includes the steps, which provide a stand-alone measuring electrode on the first part and the scheme for resistivity measurements, the work is connected to the measuring electrode and telemetry scheme; create a voltage at the insulated gap, stimulating electric current in the surrounding geological strata; receive telemetry information and get the measurement of the resistivity of a geological formation.

The preceding paragraphs have outlined the features and technical advantages of the present invention, which will become more understandable from the following detailed description of the image is etenia. Next will be described further characteristics and advantages of the invention forming the subject of the claims.

Brief description of drawings

The above and other features and aspects of the present invention can be better understood if we turn to the following detailed description of particular embodiments of the invention, shown in conjunction with the attached drawings, where:

figa-1C - General scheme of the EM telemetry tool for MVD;

figa-2B illustrate a variant implementation of the integrated tool electrode resistivity measurements and EM telemetry that uses the ring of the measuring electrodes;

figs - type variant implementation of the integrated tool electrode resistivity measurements and EM telemetry, which uses a compact disk of the measuring electrodes;

figure 3 - diagram of the system and the electric circuit resistivity measurements;

4 is a diagram of another system and electric circuit resistivity measurements, which uses electronic Assembly for resistivity measurements, the work is connected to the telemetry electronics;

figure 5 - illustration of complex downhole tool to simulate the response of a comprehensive tool for the serenia resistivity and telemetry;

6 is a system diagram and electrical schematic of the focused matrix for resistivity measurements;

Fig.7 is a diagram of a variant implementation of the integrated tool for resistivity measurements and telemetry with an inductive coupling element;

Fig - view in the context of inductive coupling element, shown in Fig.7;

figa diagram resistivity measurements, concluded in a separate adapter, located above the drilling crown;

figv diagram resistivity measurements, concluded in a separate adapter containing the measuring electrode;

figs diagram resistivity measurements, concluded in a separate adapter containing measuring and sensing electrodes;

figa - measuring circuit for rendering the wellbore in a separate adapter, located above the drill bit;

figv diagram of the measuring adapter to build the image of a well bore having a circular cross-section;

figs diagram of the adapter to build the image of the wellbore, planted on the end which has a compact disk electrodes;

11 is a diagram of a compact disk electrode with a pair of sensitive ring electrodes.

Detailed description

Refer to the drawings, which shows the s elements are not necessarily shown to scale and where the same or similar elements are denoted by the same numerical position on multiple drawings.

Used herein, the terms "top" and "down"; "upper" and "lower"; and other like terms indicating position relative to a given point or element are used to more clearly describe some elements of the embodiments of the invention. In General, these terms refer to a reference point, for example, the surface from which begin drilling operations, is considered the top point, and the total depth of the well is considered to be the lowest point.

On figa-1C shows the corresponding prior art electromagnetic telemetry tool or instrument of measurement while drilling ("MWD"), designated as a whole by position 5. The MWD tool 5 includes a heavy-weight drill pipe 6, which has a first part 12 and second part 14, separated by an insulated gap 16. In the illustrations of the first part 12 is the upper connection heavy-weight drill pipe, and the second part 14 is bottom heavy-weight drill pipe for the purpose of illustration, but not limitation. Unless otherwise stated, the first part 12 may be top or bottom heavy-weight drill pipe, and the second part 14 is opposite part relatively isolated gap 16. Insulated gap 16 typically includes a pin connection 18 with ceramic coating and internal and external 20a, 20b isolation in order to avoid cutting the value of water in pinned connection 18 with a ceramic coating. Thin Steklovolokno epoxy cylinders provide isolation inside and outside of heavy-weight drill pipe 6.

Electronic cartridge 22 is located in the first part 12 and, preferably, in the upper part to extract. Electronic cartridge 22 includes a source 24 and voltage telemetry circuit and electrically connected to an electric contact 15) directly with the first part 12 heavy-weight drill pipe 6. Electronic cartridge 22 can also include other tools, such as sensor gamma radiation and surveying instruments. Insulated metal connecting sub 26 carries wires inside heavy-weight drill pipe 5 from the electronic cartridge 22 to the second part 14. Connecting sub 26 is inserted into the electrical contact (receiving part) 27 the second part 14, and an electric current passes through the wires to the second part 14. As stated above, it is desirable that the electronic cartridge 22 were located in the upper part of the heavy-weight drill pipe to the cartridge and a docking sub could, if necessary, to remove from the wellbore through a wired fishing operations.

During operation, as shown in figs, the tool 5 is located in the wellbore or borehole drilled in the earth. Tool 5 creates a voltage drop on a stand-alone is Azora 16, exciting the axial current in the drill string, which is returned through the geological formation. The first and second parts 12, 14 form the two electrodes under the voltages V1 and V2, respectively. In a homogeneous environment, the currents in the reservoir flows into approximately spherical shells. Tool 5 can create a strong electric current, which flows along the bottom of the link 28 of the bottom of the drill string ("BHA") to the drilling bit 30.

On figa-2C shows illustrative embodiments of an integrated tool for electrode resistivity measurements and EM telemetry, meets the present invention, designated as a whole by position 10. Combined downhole tool 10 includes the above telemetry tool 5, and optionally includes one or more measuring electrodes 32 to provide resistivity measurements in the EM telemetry tool 5. Adding the measuring electrode 32 and the associated electronics in the tool 5 and using the insulated gap 16 and the electronic cartridge 22, it is possible to obtain a measurement of the resistivity of a good quality with high vertical resolution, which ensures efficiency.

The electrode 32 may be a ring electrode (figa and 2B) or compact disk electrode (figs. Ring electrodes azimuthal symmetric and assist in the detection of very thin layers (for example, thickness of three inches in two-inch electrode). Compact disk electrodes have azimuthal sensitivity, allowing to measure the azimuthal changes of resistivity. Compact disk electrodes facilitate the construction of the image of the wellbore, which can be used to determine tilt, for detecting cracks and downhole reservoir management drilling deviated wells. It should be understood that the present invention provides for joint use of ring and compact disk electrodes. Throughout the description of the invention the ring and compact disk electrodes will be called in General the measuring electrodes 32 for convenience and on the relevant drawings will, in General, to define and portray them as ring electrodes. However, the invention is equally applicable to circular and compact disk electrodes.

According figa-2C, the General concept of the present invention will be described as applied to the ring electrode. Insulated measuring electrode 32 is in the second or lower portion 12, although it may be on either side of the isolated gap 16. The electrode 32 is insulated 38 of weighted b is Riley pipe 6. The electrode 32 is connected to the electronic cartridge 22 through the connecting sub 26. It should also be understood that the measuring electrode 32 and associated circuitry for measuring the resistivity can be placed on the adapter in the BHA, separately from the telemetry tool for MVD.

The electrode can be installed on a fat partition wall heavy-weight drill pipe 6, where the insulated gap 16 and Steklovolokno epoxy cylinders. Heavy-weight drill pipe 6 must be greater than the tool 5 (approximately 1 to 2 feet) to provide space for the measuring electrode 32 and to provide a degree of focus, which is part of the heavy-weight drill pipe 6, labeled "V2" in the vicinity of the electrode 32 (figa and 2C). For the manufacture of tool Steklovolokno epoxy layer can be used for isolation electrode 32, at the same time, the fiberglass with epoxy resin is added to heavy-weight drill pipe 6 on top of the insulated gap 16. The fiberglass with epoxy, you can do a groove for placement of the electrode 32. Wire 40 power supply can be connected to the electrode 32 located in the groove, and is connected to the electrical contact 27. For the measuring electrode 32 is required hermetic partition, confused because the pressure between the inner space (channel 34) and outside of heavy-weight drill pipe 6 can be significant. Connecting sub 26 may include a "wet sleeve" connection 36, preventing the return current through the channel 34 in the first part 12. Wet socket joint allows you to create an electrical connection in the presence of fluids, for example, drilling mud.

Electronic cartridge 22 supported on the measuring electrode 32 has the same potential as the second part 14 heavy-weight drill pipe 6, which is the electrode 32. The lower part 14 is an equipotential surface, thus, according figa, V2=V3=V4, where V2 is the potential of the second part 14 between the insulated gap 16 and the electrode 32, V3 - isolated potential of the measuring electrode 32, V4 - potential of the second part 14 under insulated electrode 32. This configuration resembles the matrix "LL3". Matrix LL3 is wired system resistivity measurements, where above and below the Central measuring electrode are two long electrode, and where all three electrodes is the same potential. The apparent resistivity from the measuring electrode 32 is determined by the expression RA=KA(V3-V1)/I3, where KA- a constant dependent on the geometry of the electrodes.

As described above, a compact disk electrode (figs) can be used in addition to or instead of the ring electrode. Compact disk-e is ctred 32 can be mounted flush with the outer surface of the heavy-weight drill pipe 6, or can be installed on planted late (not shown) to reduce the distance from the wall of the wellbore.

Figure 3, 4 and 6 shows the various electrical circuits for resistivity measurements, which meets the present invention. Figure 3, 4 and 6 of the measuring electrode 32 is located in the second part 14.

Figure 3 shows the first circuit 42 for resistivity measurements, built-in electronic cartridge 22, which is transformer-sensitive current, and an operational amplifier with low input impedance. The electrode 32 is attached to the second part 14 heavy-weight drill pipe. The wire 44 is connected between the voltage source 24 and the first part 12 and conducts current (I1). The wire 46 is connected between the voltage source 24 and the second part 14 and conducts current (I2 and I4) to the second part 14 heavy-weight drill pipe. The wire 48 is additionally connects the voltage source 24 and the electrode 32, the conducting current of the electrode (I3) to the measuring electrode 32. Current electrode I3 is measured using the operational amplifier 50 with a low input impedance and transformer 52. If the wire 48, the transformer current measurement and the contacts being connected in series, have a low resistance, the voltage V3 on the measuring electrode 32 is essentially the same as the voltage on the second part 14 heavy-weight drill pipe (i.e. V3=V2=V4). Wet-socket connector for connecting the transfer is nick 26 (pigv) guarantees the whole current of the electrode I3 flows out of heavy-weight drill pipe and does not flow inside the heavy-weight drill pipe in the first part 12 (V1).

Figure 4 shows a second circuit 54 for resistivity measurements, built-in input of the electronic Assembly 56. The input of the electronic Assembly 56 or electronics to measure the specific resistance is located near the measuring electrode 32 and provides focus, provides a measuring current of the electrode I3, measures the outgoing current and encrypts the results to send back to the electronic cartridge 22. The input of the electronic Assembly 56 may be placed in a protective casing that is located either inside the heavy-weight drill pipe, or in recess, done in heavy-weight drill pipe. Additional wiring (not shown) may provide power and functional connection between the input of the electronic Assembly 56 and an electronic Assembly 22.

Operational amplifier 58 with high input impedance is connected between the second part 14 heavy-weight drill pipe and the measuring electrode 32. The potential difference ΔV between the measuring electrode 32 and the second part 14 is fed to the input of the operational amplifier 58 with high input impedance. The output current I3 of the operational amplifier 58 is supplied to the measuring electrode 32 through a calibrated resistor 60. adena voltage on the calibrated resistor 60, proportional to the current I3, is logged. Operational amplifier 58 clears the potential difference to maintain essentially the same potential at the measuring electrode 32 and the second part 14 heavy-weight drill pipe. The second circuit 54 for resistivity measurements can resolve the error voltage, which can occur in the first measuring circuit 42 (Fig 3).

Consider the example of the resistivity measurements using complex downhole tool 10, which uses the first or the second circuit 42, 54. Obviously, the resistivity measurements taking place in relation to the first and second circuits is also applied to focus electrode matrix and the circuit 62, described below. The geometry of the tool 10 is shown in figure 5. Heavy-weight drill pipe 6 have a diameter of seven inches (15,4 cm). The gap 16 is twenty-eight inches (61,6 cm) Steklovolokno-epoxy insulation 20. The second part 14 includes twelve inches (26.4 cm) bare weighted pipe between the gap 16 and the measuring electrode 32. The electrode 32 has a two-inch (4.4 cm) ring electrode having a one inch (2.2 cm) of insulation from each side. Non-insulated, weighted pipe has a length of two hundred and ninety-eight inches (655,6 cm) below the electrode 32. Price is R measuring electrode 32 has the coordinate z=0, the end bit is the coordinate z=-300 inches (660 cm). The top point of the drill string has the coordinate z=2000 inches (4400 cm) for the simulation.

For modelling purposes, assume that the voltage V3 on the measuring electrode 32 is the same as on the nearby heavy-weight drill pipe, and that the effects of the resistance of the electrode is negligible. There are eight unknowns V1, V2, V3, V4, I1, I2, I3 and I4 corresponding to the voltages on the various conductors and the currents flowing from them. The second part 14 heavy-weight drill pipe 6 is an equipotential surface (V2=V4). The focus condition for the measuring electrode 32 is V3=V4. The law of conservation of charge requires that I1+I2+I3+I4=0. I3 set equal to 1 And to ensure a nontrivial solution. The other four equations are required to solve presented in equation 1

(Equation 1)

where Zij is transimpedance between the various electrodes.

The elements Zij are calculated based on the geometry of the tool 10, the geometry of the reservoir and values of resistivity.

In matrix write four equations are expressed as follows (please note that I is the vector current, and not a unit vector)

(Equation 2)

Conditions for voltages can be converted to the form

(Equation 3A)
or(Equation 3b)

Conditions for the currents can be converted to the form

(Equation 4A)
or(Equation 4b)

Current and voltage can be found as follows:


(Equation 5)
(Equation 6)
and(Equation 7)

Apparent resistivity determined from the isolated gap 16 to the drill bit 30 (figs), referred to as the resistivity of the bit", is defined as follows:

(Equation 8)

The negative sign is necessary because the condition I1<0. The K factor for the measuring electrode 32 and the resistivity of the bit can be obtained by simulating a very thick layer with a resistivity of 1 Ω∙m, without the wellbore, and requiring that RA=RB=1 Ω∙m

Figure 6 presents the third circuit 62 for resistivity measurements. The circuit 62 is embedded in the input electronic Assembly 56 or Assembly for resistivity measurements. The input of the electronic Assembly 56 may be placed in a protective casing that is located either inside the heavy-weight drill pipe, or in recess, done in heavy-weight drill pipe. Additional wiring (not shown) may provide power and functional connection between the input of the electronic Assembly 56 and an electronic Assembly 22.

The circuit 62 is similar to the circuit 54, including the amplifier 58 with high input impedance and a calibrated resistor 60. The voltage is measured on the calibrated resistor 60 to determine the current I3. System circuit 32 includes the sensing electrodes 64, attached to the same part of the heavy-weight drill pipe and the measuring electrode 32, the second part 14 in the illustrated embodiments of the invention. In the case of annular ele is trade (illustrated) sensitive electrodes 64 are thin rings relative to the measuring electrode 32. In the case of a compact disk electrode, the sensing electrodes 64 are circular rings that surround the compact disk electrode and concentric with him.

According to a variant embodiment of the invention, presented in Fig.6, the voltage on the four sensing electrodes 64 are marked, respectively, V3, V4, V6 and V7. The voltage on the upper part 14 heavy-weight drill pipe is designated as V2 and V8, and the voltage measuring electrode 32 is designated as V5.

Two of the most sensitive external electrode 64, relative to the measuring electrode 32, are connected to each other, so V3=V7. Two of the most sensitive internal electrode 64, relative to the measuring electrode 32, is also connected to each other, so V4=V6.

Operational amplifier 58 with high input impedance nulls the voltage drop (i.e. V3-V4=V7-V6→0; or V3+V7-V4-V6→0). The current I5 on the measuring electrode 32 is determined from the voltage across the resistor 60.

Circuit 62 provides a number of advantages for the system. First, when the voltage drop on the sensing electrodes 64 is zero, there is no full axial current flowing in the wellbore near the measuring electrode 32. Thus, the current coming from the measuring electrode 32, flows radially into the formation. This minimizes the impact of the wellbore and allows metering is a very high resistivity of the formation in drilling fluids with very low resistivity.

System circuit 62 greatly reduces the effects of the resistance of the electrode, which may be present in other measurement schemes. The effects of the resistance of the electrode due to the difference in the nature of metal conduction and fluid. The electrical current in the electrode is transferred to the electrons in the conduction of the metal, whereas the current in the drilling fluid is transferred to the ions of the solution. The transfer of electric charge through the interface of the metal-fluid involves a chemical process which can be modeled as the impedance of the electrode. In the system schema 62 current does not flow sensitive electrodes, since the operational amplifier has very high input impedance. Thus, the sensing electrodes measure the true electric potential in the wellbore, and the condition of zero potential difference in the wellbore is strictly carried out.

Figure 11 shows a compact disk measuring electrode 32, surrounded by a pair of sensitive ring electrodes. The potential difference measured between two sensitive electrodes (V3-V4), is fed to an amplifier with high input resistance, which controls the circuit 62, as shown in Fig.6. 6 directly applicable to compact disk electrode, shown at 11, where V3 and V7 are the opposite side, the EXT is th sensitive ring electrode, and where V4 and V6 represent the opposite sides of the inner sensitive ring electrode.

7 schematically shows a variant embodiment of the invention, involving the use of inductive coupling element. This variant of the invention provides a power supply input of the electronic Assembly 56 (figure 4 and 6) and electrical and functional connection of the input of the electronic circuit 62 and the electronic cartridge 22. This variant implementation eliminates the need for wet-socket electrical connections and eliminates the need for precise axial alignment stinger 26, thereby allowing some axial movement of the stinger.

System with inductive coupling element 66 is shown in Fig.7. with respect to the system focuses circuit 54 shown in figure 4. Note, however, that it is adapted to any system having an Assembly remote measurement of resistivity, for example, shown in Fig.6.

We will continue the description of the system with an inductive element 66 communication with reference to Fig.7 and 8. The inductive element 66 communication is implemented in hardware boarding and orientation. Sub 68 with an oblique cut is positioned over the gap 16 and centered inside a heavy-weight drill pipe 6. Boarding Shoe 70 is located n the electronic cartridge 22 and performs the azimuthal orientation of the cartridge 22, and aligns it along one axis with heavy-weight drill pipe 6. Half of the inductive element 66 connection is installed at the lower end of the sub 68 with an oblique cut and during operation is connected to the input of the electronic Assembly 56, and the other half mounted on the upper end of the planting Shoe 70 and during operation is connected to the telemetry cartridge 22. Each half of the element 66 connection includes a core 72 with high magnetic permeability and the winding 74.

According to Fig.3-8, the measurement of specific resistance can be produced simultaneously with the EM telemetry signal or alternative. One option is just to use EM telemetry signal as a control voltage and current. The voltage drop across the insulated gap 16 and the resulting current measuring electrode 32 is measured. Alternatively, the measurement of specific resistance (e.g., 100 Hz), it is possible to interleave with EM telemetry transmission (e.g., 1 Hz). This allows measurement of specific resistance at the same frequency at all depths. According to another variant embodiment of the invention, the high and low frequencies can be used together. When there is a voltage source with digital control downhole processor can summarize the two wave signal, which specify voltage is agenie and current gap 16. High-frequency signal is subject to attenuation and will not be registered on the surface, and the low-frequency signal can be filtered from the resistivity measurements.

According figa, a separate adapter 100 that contains the device resistivity measurements, is located between the system 103 controls directional drilling and the drill bit 101. Insulated gap 16 is located above the system 103 controls directional drilling. Section 14 heavy-weight drill pipe are connected with heavy-weight drill pipe system 103 controls directional drilling, which, in turn, is connected to the adapter 100 for resistivity measurements. The control system of directional drilling may be a downhole turbine motor and the curve or power management system aimed rotary drilling. In any case, section 14, 103 and 114 heavy-weight drill pipe and drill bit 101 have the same potential. The adapter 100 for resistivity measurements provides a resistivity measurements, consisting of one or more electrodes mounted on isolation. The resistivity of the layer is measured as soon as the bit penetrates the formation, which allows you to quickly make decisions.

On FIGU shows a first implementation of the adapter light your the and 100 for resistivity measurements with the measuring electrode 32. On the measuring electrode is maintained the same potential as in section 114 heavy-weight drill pipe, using electrical circuits similar to those shown in figure 4. Operational amplifier 58 with high input impedance is used in conjunction with a calibrated current resistor 60 to create on the measuring electrode to the same potential as heavy-weight drill pipe 114, and to determine the current I3. The adapter 100 for resistivity measurements may be connected to the MWD tool with electrical wires and inductive coupling element. Alternatively, it may be more convenient to include in the adapter 100 for measuring the specific resistance of the battery as a power source and use a relay telemetry system for transmitting information about the specific resistance of the MWD tool, which will transmit it to the surface. Relay telemetry systems include a means of inductive coupling (reference patents AIM and the clink). This allows you to install the adapter 100 for resistivity measurements before downhole turbine engine that may not provide the path for the transaction.

On figs shows a second implementation of the adapter 100 for resistivity measurements with the measuring electrode 32 and the feeling is twitternya electrodes 102. Measuring electronics similar to those shown in Fig.6. The sensing electrodes are monitored operational amplifier with high input impedance and maintained at the same voltage by the current I5 coming from the measuring electrode 32. As before, the current I5 is monitored by the voltage on the calibrated resistor 60.

Although figa shown separate adapter 100 for resistivity measurements above the drill bit, it can be located anywhere in the drill string. The farther is the adapter 100 for resistivity measurements from the isolated gap 16, the greater radial depth research by resistivity measurements. Thus, the adapter 100 for resistivity measurements may be located a few hundred feet from the isolated gap 16 and, thus, to provide a very great depth research. Several of these adapters 100 for resistivity measurements can be located along the drill string, thereby providing multiple depths of investigation. Alternatively, the system resistivity measurements can be integrated into another component of the drill string. For example, the electrodes and the corresponding electronics can be part of si is management issues aimed rotary drilling, and share the power source, the processor electronics and telemetry management system aimed rotary drilling.

On figa shows the adapter 105 to construct images of the borehole, located under system 103 controls directional drilling and above the drill bit 101. Weighted pipe adapter 114 imaging wellbore has the same potential as section 14 heavy-weight drill pipes and 103 control directional drilling. The adapter will generate an image of the wellbore contains multiple compact disc electrodes 32, and each compact disk electrode connected to the electronic circuit, for example, shown in figure 4. When you add a sensitive electrodes each compact disk electrode uses a scheme as shown in Fig.6. The adapter will generate an image of the wellbore measures the azimuth of the instrument using magnetometer or accelerometer, is known from the prior art. The resistivity at the disk electrode are measured as the rotation of the drill string and registered in relation to the azimuth of the tool for creating maps of resistivity. The measurements can be transmitted to the MWD tool for broadcast on the surface. Map of resistivity can be used to determine the tilt direction and the tilt for detection of thin layers and to determine the position of open cracks.

On FIGU shown a compact disk electrodes 32, mounted on heavy-weight drill pipe with a circular cross section. On figs shown a compact disk electrodes 32, mounted on the planted part of the heavy-weight drill pipe for placing them closer to the wall of the wellbore. The adapter will generate an image of the wellbore is shown under system control directional drilling, but can be installed anywhere in the drill string. The build system image of the wellbore can also be embedded in another component of the drill string, for example in a control system aimed rotary drilling.

From the above detailed description of specific embodiments of the invention follows that there has been disclosed a system for integrating measurements of resistivity in the downhole telemetry tool, which is a sign of novelty. Although there have been disclosed in detail only certain specific embodiments of the invention, it was made solely for purposes of describing various features and aspects of the invention but not to limit the scope of the invention. It is obvious that the disclosed embodiments of varying replacement, alteration, and/or modificat and, including, but not limited to the suggested variants of implementation, without departing from the essence and scope of the invention defined by the attached claims.

1. A comprehensive tool for resistivity measurements and telemetry for use in a well bore containing
heavy-weight drill pipe, comprising the upper part and the lower part, separated by an insulated gap,
electronic cartridge bearing telemetry scheme, located in the heavy-weight drill pipe,
the measuring electrode placed on heavy-weight drill pipe, and
the schema for resistivity measurements, the work is connected to the measuring electrode and the electronic cartridge.

2. The tool according to claim 1, in which the electronic cartridge includes a source of AC voltage to provide the potential difference on a stand-alone gap.

3. The tool according to claim 2, in which the voltage source AC can operate on multiple frequencies for telemetry operations and operations measurement of specific resistance.

4. The tool according to claim 1, in which the electronic cartridge further comprises a sensing device.

5. The tool according to claim 1, in which the electronic cartridge is retrieved.

6. The tool according to claim 1, which which the measuring electrode includes a ring electrode, compact disk electrode or any combination of them.

7. The tool according to claim 1, in which the insulated gap and the measuring electrode are located at some distance from each other, and the distance is chosen to create the desired depth research for resistivity measurements.

8. The tool according to claim 1, in which the circuit for measuring the resistivity supported on the measuring electrode, essentially, the same potential as that on the part of the heavy-weight drill pipe, carrying the measuring electrode.

9. The tool according to claim 1, in which the circuit for measuring the resistivity of a part of the electronic cartridge.

10. The tool according to claim 1, in which the circuit for measuring the resistivity of a part of the input electronic Assembly, separate from the electronic cartridge.

11. The tool according to claim 1, in which the circuitry for resistivity measurements and telemetry circuit are connected through inductive coupling element.

12. The tool according to claim 1, in which the circuit for measuring the resistivity contains operational amplifier with low input impedance.

13. The tool according to claim 1, in which the circuit for measuring the resistivity contains operational amplifier with high input impedance.

14. The tool according to claim 1, additionally containing h is stitely electrode, posted on heavy-weight drill pipe near the measuring electrode.

15. The tool 14, in which the measuring electrode is a compact disk electrode and the sensing electrode is a pair of annular electrodes surrounding the compact disk electrode.

16. The tool 14, in which the circuit for measuring the resistivity includes an amplifier with high input impedance, measuring the potential difference between the two annular electrodes and the stimulating current to the measuring electrode, resulting in a potential difference equal to zero.

17. The tool 14, in which the measuring electrode is a ring electrode and the sensing electrode contains two pair of annular electrodes, in which one pair of sensitive ring electrode is located above the annular electrode, and the other pair of sensitive ring electrode is located under the ring electrode.

18. The tool 14, in which the measuring electrode is a ring electrode and the sensing electrode comprises a pair of sensitive ring of electrodes, wherein the pair of sensitive ring of electrodes is located near the ring electrode.

19. The tool 14, in which the circuit for measuring the resistivity who engages in amplifier with high input impedance, measuring the potential difference between two sensitive electrodes and the stimulating current to the measuring electrode, resulting in a potential difference equal to zero.

20. The tool according to claim 1, in which the lower part contains all or part of the layout of the bottom of the drill string, and the layout of the bottom of the drill string contains a variety of downhole tools.

21. The tool p, in which the layout of the bottom of the drill string contains the adapter and the adapter carries the measuring electrode and the schema for resistivity measurements.

22. The tool p, in which the measuring electrode and the scheme for resistivity measurements are part of one or more downhole tools.

23. A method of obtaining a measurement of the resistivity of the formation using telemetry tool located in the borehole, and a telemetry tool includes a heavy-weight drill pipe having an upper portion and a lower portion separated by an insulated gap, and an electronic cartridge that carries the telemetry circuit, the method contains the steps that
provide a measuring electrode and a circuit for measuring the specific resistance during operation is connected to the measuring electrode and the electronic cartridge
create n is Prairie on a stand-alone gap for excitation of the electric current in the surrounding formation,
receive telemetry information and
get the measurement of the resistivity of the formation.

24. The method according to item 23, in which the measuring electrode is a compact disk electrode, and the method further comprises the steps by which rotate heavy-weight drill pipe and use a compact disk electrode to create a map of the resistivity of the wall of the wellbore.

25. The method according to item 23, further containing phase, which extracts the electronic cartridge.

26. The method according to item 23, further containing a stage, on which is supported on the measuring electrode, essentially, the same potential as that on the part.

27. The method according to item 23, further containing the step where you choose the explode distance between the measuring electrode and an insulated gap to ensure the required depth research.

28. The method according to item 23, further comprising stages, which
provide a pair of the sensing electrodes near the measuring electrode,
measure the potential difference between two sensitive electrodes and
excite current to the measuring electrode, resulting in a potential difference is equal to zero.

29. The method according to item 23, further containing phase, which provide a voltage at multiple frequencies for telemetry op the walkie-talkies and operations measurement of specific resistance.

30. Tool resistivity measurements for use in a well bore containing
heavy-weight drill pipe, comprising the upper part and the lower part, separated by an insulated gap,
the measuring electrode placed on heavy-weight drill pipe, and
the sensing electrode near the measuring electrode placed on the part of the heavy-weight drill pipe, carrying the measuring electrode.

31. The tool according to item 30, optionally containing a source of AC voltage to provide the potential difference on a stand-alone gap.

32. The tool p, in which the voltage source AC can operate on multiple frequencies.

33. The tool according to item 30, optionally containing an electronic cartridge that is located in heavy-weight drill pipe.

34. The tool p, in which the electronic cartridge is retrieved.

35. The tool according to item 30, in which the measuring electrode includes a ring electrode, a compact disk electrode or any combination of them.

36. The tool p, in which the measuring electrode is a compact disk electrode and the sensing electrode is a pair of annular electrodes surrounding the compact disk electrode.

37. The tool p in which the scheme and the intent of the resistivity includes an amplifier with high input impedance, measuring the potential difference between the two annular electrodes and the stimulating current to the measuring electrode, resulting in a potential difference equal to zero.

38. The tool p, in which the measuring electrode is a ring electrode and the sensing electrode contains two pair of annular electrodes, in which one pair of sensitive ring electrode is located above the annular electrode, and the other pair of sensitive ring electrode is located under the ring electrode.

39. The tool p, in which the measuring electrode is a ring electrode and the sensing electrode comprises a pair of sensitive ring of electrodes, wherein the pair of sensitive ring of electrodes is located near the ring electrode.

40. The tool according to item 30, optionally containing a scheme for resistivity measurements, the work is connected to the measuring electrode and the sensing electrode.

41. The tool p, in which the circuit for measuring the resistivity supported on the measuring electrode, essentially, the same potential as the sensing electrode and part of the heavy-weight drill pipe, carrying the measuring electrode.

42. The tool p, in which the circuit for measuring the specific fight the Oia includes an amplifier with high input impedance, measuring the potential difference between two sensitive electrodes and the stimulating current to the measuring electrode, resulting in a potential difference equal to zero.

43. The tool according to item 30, in which part contains all or part of the layout of the bottom of the drill string, and the layout of the bottom of the drill string contains a variety of downhole tools.

44. The tool according to item 43, in which the layout of the bottom of the drill string contains the adapter and the adapter carries the measuring electrode, the sensing electrode and the schema for resistivity measurements.

45. The tool according to item 44, in which the insulated gap and adapters are at some distance from each other, and the distance is chosen to create the desired depth research for resistivity measurements.

46. The tool according to item 43, in which the measuring electrode, the sensing electrode and the scheme for resistivity measurements are part of one or more downhole tools.

47. Tool resistivity measurements for use in a well bore containing
heavy-weight drill pipe, comprising the upper part and the lower part, separated by an insulated gap,
a driver circuit for creating a potential difference on a stand-alone gap and
and the measuring adapter, with the measuring electrode and the measuring circuit.

48. The tool p, in which the control circuit can operate at multiple frequencies.

49. The tool p, in which the control circuit is retrieved.

50. The tool p, in which the measuring electrode includes a ring electrode, a compact disk electrode or any combination of them.

51. The tool p, in which the measuring adapter further comprises a sensing electrode.

52. Tool § 51, in which the measuring electrode is a compact disk electrode and the sensing electrode is a pair of annular electrodes surrounding the compact disk electrode.

53. The tool according to paragraph 52, in which the circuit for measuring the resistivity includes an amplifier with high input impedance, measuring the potential difference between the two annular electrodes and the stimulating current to the measuring electrode, resulting in a potential difference equal to zero.

54. Tool § 51, in which the measuring electrode is a ring electrode and the sensing electrode contains two pair of annular electrodes, in which one pair of sensitive ring electrode is located above the annular electrode, and the other pair is sensitive is olcovich electrode is located under the ring electrode.

55. Tool § 51, in which the measuring electrode is a ring electrode and the sensing electrode comprises a pair of sensitive ring of electrodes, wherein the pair of sensitive ring of electrodes is located near the ring electrode.

56. Tool § 51, in which the measuring circuit supported on the measuring electrode, essentially, the same potential as the sensing electrode and part of the heavy-weight drill pipe, carrying the measuring electrode.

57. Tool § 51, in which the measuring circuit includes an amplifier with high input impedance, measuring the potential difference between two sensitive electrodes and the stimulating current to the measuring electrode, resulting in a potential difference equal to zero.

58. The tool p, in which the insulated gap and measuring adapter are located at some distance from each other, and the distance is chosen to create the desired depth research for resistivity measurements.



 

Same patents:

FIELD: physics.

SUBSTANCE: at an observation line, two three-electrode electrical soundings are performed using an apparatus comprising four earthing contacts lying on one line symmetrically about the observation point. The fifth earthing contact relates to virtual "infinity" and is connected to one terminal of an electric current source. Central earthing contacts are connected to a voltage measuring device. When taking measurements, outermost power earthing contacts are successively connected to the other terminal of the electric current source. Potential drop Δ UAMN and ΔUA'MN between receiving earthing contacts is measured. The operations are repeated for all given positions of power earthing contacts. Potential drop for vertical electrical sounding and potential drop for unipolar sounding is calculated from the measured potential drop at each observation point for given differences. The distribution of apparent electrical resistance in sections for two three-electrode and vertical sounding and distribution in section of potential drop for unipolar sounding is determined from the measured and calculated potential drops. The results determine the presence and location in the section of geological irregularities.

EFFECT: high efficiency of detecting geological irregularities in the geological environment.

1 tbl, 1 dwg

FIELD: physics.

SUBSTANCE: potentially dangerous area is selected on territory to be analysed. At least three measuring modules are arranged on said area. Every said module consists of radiating electrode, main electrode pair with its one electrode making zero electrode, and at least one additional electrode pair. Said electrode pairs of measuring electrode are arranged at 180°/n to each other where n stands for number of electrode pair. All electrodes are located on one equipotentional line of radiating electrode. Electrodes of one pair are arranged on one line with radiating electrode. Directional diagrams of electrode pairs are plotted. Potential difference is measured between zero electrode and main electrode pair, and other electrodes of appropriate measuring module. Abnormal potential difference and direction diagram are used to determine direction for each measuring module to zone of rocks irregularities. Zone location is defined at intersection of said directions.

EFFECT: higher accuracy and validity.

3 dwg

FIELD: mining.

SUBSTANCE: at the profile points the current is supplied through a pair of feeding electrodes to the earth. Current value and potential difference between pair of receiving electrodes is measured. Feeding electrodes are moved with pitch equal to 1 m symmetrically relative to the centre to limit distance between feeding electrodes, which is determined by the specified investigation depth. As per measurement results the apparent specific resistance is calculated. As per data of apparent specific resistance the graph of its behaviour is built depending on half-spacings of feeding electrodes. Specific resistances of frozen beds are calculated as per apparent specific resistance graph. Percentage of clay in unit volume of rock is calculated as per data of specific resistances of frozen beds by the following formula: where ρclay - specific clay resistance, which in permafrost zone section is characterised as constant value which on average is equal to 100 ohm m, ρfb -specific resistance of frozen bed. Lithologic composition of sand-clay complex of frozen rocks is determined as per clay content.

EFFECT: reducing the cost of operations and improving informativity owing to determining lithologic composition of frozen rocks without any drilling data and using common data on geologic structure of investigation region.

1 tbl, 2 dwg

FIELD: physics.

SUBSTANCE: current is cutoff to soil through two point sources. The first source is placed close by vertical interface, and the second is taken to infinity. Position of one equipotential line of electric field is detected. Measuring electrodes is mounted by tangent to equipotential line symmetrically to tangency point of ray lined from auxiliary point presenting mirror reflection of point source relative to interface with specified equipotential. Besides, measuring electrodes can be placed by line, perpendicular to interface symmetrically to power supply provided close by interface. Near to interface there is compensatory point source with current value fixed by parity where I0, Ik are currents from the first and compensatory sources, ΔΨ1MN is differential of the space function that determinates position of measuring electrodes relative to the first source, ΔΨ2MN is differential of space function that determinates position of measuring electrodes relative to compensatory source. Measuring electrodes voltage indicates time variations of resistivity.

EFFECT: simplified positioning of electrical survey unit and improved measurement accuracy.

1 dwg

FIELD: geoelectrical prospecting.

SUBSTANCE: invention relates to geoelectrical prospecting by the electrical resistance method. The method uses two fixed supplying grounding circuits, the first of them being located in practical infinity, the other one along with two fixed reception grounding circuits being arranged nearby the observation profile, two additional movable grounding circuits located at equal distance from the second supplying grounding circuit. In measurements, in every position of the movable grounding circuits, the latter are connected in turns to a power source or an instrument. On connecting them to the power source, a voltage drop between the fixed reception grounding circuits is measured. On connecting them to instrument and measuring the voltage drop between them, the fixed supplying grounding circuits are connected to electric power source. The aforesaid operations are effected for all preset positions of the movable grounding circuits. Proceeding the measurement results, sections of apparent electrical resistance and voltage drop are plotted to estimate the availability of geoelectrical irregularities in the section.

EFFECT: higher efficiency of revealing geoelectrical irregularities and lower ambiguity in experimental data interpretation.

1 dwg

FIELD: physics; geophysics.

SUBSTANCE: current pulse is excited in the medium under investigation, and parameters of its induced polarisation are defined. Geoelectric section is generated to make a conclusion about the presence of hydrocarbon fields on the basis of abnormal manifestations of induced polarisation parameters. At that, electromagnetic and seismic waves are excited simultaneously or with a time shift. To excite the said waves unipolar rectangular impulses of direct current are generated, their absolute and relative duration depending on parameters of medium under investigation. In the beginning of timing pulse electric field is measured simultaneously at measuring probe groups of two detector lines towed at different depth. Besides, detector line depth and hydroacoustic pressure of seismic source are measured. Also a device is offered, which includes pulse generator, capacitor charging unit, power generator, bank of capacitors, switchboard, seismic emitter, transmitter/receiver line, receiver line, multi-channel gauge, echo-sounder, GPS satellite navigation receiver, signal processor.

EFFECT: higher reliability of research results.

18 cl, 6 dwg

FIELD: geophysical prospecting by electric means by the method of induced polarization.

SUBSTANCE: the device has an exciting field forming unit and a signal measurement unit. The exciting field forming unit has a ship generator, switch forming bipolar DC square pulses, generating plant and a ballast device. The signal measurement unit has a receiving multi-electrode line, resistivimeter, multi-channel measuring device, ship echo sounder, Global Position System receiving indicator and a signal processor. According to the claimed method, the research of the geological medium along the observation outline is carried out by excitation of periodic alternating current pulses and determination of geoelectric medium parameters, geoelectric sections are constructed, a conclusion is made on the presence of a deposit of hydrocarbons according to the exposed anomalies of conduction and the parameters of induced polarization.

EFFECT: enhanced reliability of the research results.

8 cl, 5 dwg

The invention relates to the engineering-geological surveys to obtain data on the structure of the upper part of the section (high frequency resolution) of rocks to issue recommendations for the construction of engineering structures, primarily in the areas of crossings over water obstacles

The invention relates to the field of geophysical methods of prospecting and exploration of minerals and can be used to determine the parameters of the geological section and detect local variations

FIELD: oil and gas industry.

SUBSTANCE: system of pumping unit bypassing in descended at tubing column and mounted. Note that the said system consists of y-unit, swivel, bypass column and cup and it is attached to the pumping unit. Measurement or maintenance equipment is descended into the well by tubing column through pipe nipple, y-unit, swivel, bypass column and cup into the well space under the pump. Then geophysical researches of the well or maintenance activities are performed. Note that bypass pipe column is connected to the y-unit by means of cut-off clutch and attached to the pumping column by means of protectolisers with the possibility of their separation and saddle with the possibility of its separation.

EFFECT: decrease of time spent for geophysical researches and maintenance works, simplification of pumping unit and bypass system extraction from the well in emergency situations as well as improvement of measurement accuracy.

13 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: gas parameter is measured by controller performed with the possibility of automatic regular measuring of gas parameter. Water in liquid form is detected in the said device of gas monitoring of bore well or close to it. Note that there formed is a response for water detection, if water is detected in liquid form including at least one of the following responses: device deactivation, alarm signal transmitting, warning light engagement. Independent device for gas monitoring in bore well consists of gas parameter sensor and controller made with the possibility of automatic regular use of the said sensor. Gas monitoring device additionally includes water sensor made with the possibility of water detection in liquid form in the said device or close to it. Note that controller is made with the possibility of response to water detection, if water is detected in liquid form including at least one of the following responses: device deactivation, alarm signal transmitting, warning light engagement.

EFFECT: measurement accuracy improvement, device operation reliability increase.

14 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to oil and gas industry and can be used for production of liquid and gaseous hydrocarbons in wells developed several productive horizons, production control from every productive horizon and wells research without extraction of pumping equipment. Method includes descending along well tubing and installation of liner with through or plugged end, with cup, packers, mandrels and column splitters. Note that measuring and regulating instruments are descended into the well with the aid of device for dual completion of several productive horizons that includes pumping station bypassing system. Measuring and regulating instruments are installed in the mandrels by fishing tools. Geophysical researches are made along the whole well length by measuring instruments descended on a cable.

EFFECT: provision of unobstructed passing of measuring and regulating instruments along the whole down-hole equipment of dual completion of multi-layer well without contacting the pumping unit, without lifting the latter to the well mouth.

6 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: crude oil investigation device (PVT) includes high pressure vessel of variable volume, which includes mixing device and measuring instruments recording working volume of vessel, temperature and pressure in it. Mixing device is equipped with magnetic mixer consisting of two annular magnets. At that, lower end of external magnetic ring - annular rotor is connected to folding spring mixer. Spring mixer has the shape of flat band spring along the diameter equal to inner diameter of vessel, which allows mixing the whole vessel volume at its rotation. At that, when plunger-piston is introduced to or taken from vessel, flat spring is folded or stretched. Inner magnetic ring - stator is made in the form of a sleeve with possibility of rotation about head of high pressure vessel housing from external drive.

EFFECT: improving reliability, quality and accuracy of measurements.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: method to detect hydrocarbon-containing beds in process of their opening with drilling includes pumping of an indicator fluid with radon into a pore volume of permeable beds in the area with thickness of 0.03-0.05 m from the well wall deep into the bed, for at least three times. Gamma-ray logging is carried out. The indicator fluid is displaced along the well bore, by pumping of 0.1 m3 of bore fluid from the wellhead to maintain initial concentration of radon in the indicator fluid. The given mathematical expression is used to judge on availability of hydrocarbon-containing beds.

EFFECT: improved accuracy of detection of promising hydrocarbon-containing beds in the open bore of the well after their opening.

FIELD: oil and gas industry.

SUBSTANCE: pulse acoustic signal is generated at a wellhead in a tubular space. The acoustic echo signal reflected from the liquid is received. It is converted into an electric signal. Time of acoustic signal travelling from the wellhead to the fluid level is determined, as well as positions of sections with higher and lower acoustic density of gas, variation of sound speed distribution and position of non-standard space irregularities. The fluid level is determined depending on values of sound speed at well sections, as well as time of passage of an acoustic signal from the wellhead to the fluid level. At the same time the electric signal is exposed to analog-to-digital conversion, and the digitised signal is exposed to Fourier transform at each current section of the echogram in compliance with the mathematical formula. Spectrogram graphic image is built in the form of a 3D surface, where location of standard and non-standard irregularities is identified in the tubular space. Values of height are identified, at which the spectrum module has the maximum value at the specified time position of the echogram section. Dependence of sound speed on time is determined with account of the distance between neighbouring standard irregularities at the specified time position of the echogram section using the formula. And fluid level in the well is identified by discrete integration of sound speed function in the gap from the wellhead to the fluid level.

EFFECT: higher accuracy of fluid level detection in the well.

4 cl, 10 dwg

FIELD: mining.

SUBSTANCE: in one version at least one sensor of formation parameters identification (FPI) is moved into a well. An expert system is used to analyse measurement results. Logging parameters are varied based on this analysis. At the same time variation of logging parameters includes variation of specified sensor longitudinal displacement speed in a borehole on a real time basis. In one of the versions NMR signals are received from a group of sensitive volumes using a sensor on the basis of nuclear magnetic resonance (NMR) in the well. Based on these NMR signals, a part of at least one sensitive volume of the NMR sensor is identified, containing a wellbore fluid. The specified at least one sensitive volume is varied based on this identification. In another version NMR signals are received using a NMR sensor in the well. Together with the NMR signal at least one additional sensor is moved into the well, which responds to a formation property. Output signals of the specified sensors are analysed. Based on the output signals from the NMR sensor and at least one additional sensor, a part of at least one sensitive volume of the NMR sensor is identified, containing a well fluid. The specified at least one sensitive volume is varied based on this identification. The logging speed is varied based on analysis results.

EFFECT: reduction of time inputs for performance of logging, higher accuracy of measurements.

25 cl, 9 dwg

FIELD: oil and gas industry.

SUBSTANCE: field hydrodynamic researches of wells are performed. And namely, hydrodynamic pressure disturbance is performed in the formation under investigation by means of periodic or non-periodic time history of well flow rate; time dependences of flow rate and pressure are recorded. At that, pressure and flow rate is measured on the well head; pressure is measured simultaneously in tubing strings and in tubular annulus. Frequency dependences of ratio of pressure amplitude to flow rate and phase shift between them are obtained. Calculation of ratio of amplitudes and phase shift of components of frequency spectrum (harmonics) of pressure to flow rate, which are corrected to the well bottom, i.e. complex impedance of bottom-hole zone, is made. According to the formulae obtained from representation of design volumes of the well by the wiring scheme including two series coaxial lines and concentrated capacity at their connection point, for the appropriate pressure measurement points, for calculation of filtration parameters of the formation for the used non-periodic type of action from frequency dependence of impedance there used is time dependence of pressure or flow rate, which are corrected to the well bottom. As per the sufficient difference of values of complex impedance of bottom-hole zone, which are calculated as per pressure data, the conclusion is made on availability of disturbances of hydrodynamic integrity of the well design at the points located at some distance from the working face.

EFFECT: improving calculation accuracy of filtration parameters of formation, saving of time and costs for performance of field researches; possibility of detecting disturbances in the well design.

2 cl, 6 dwg

FIELD: oil and gas industry.

SUBSTANCE: automatic coupling unit is equipped with the cylinder connected to hook sleeve, and a spring. Guide and mating parts are provided in the cylinder with possibility of engagement with the hook sleeve. The latter is installed on the contact housing fixed in the housing representing a cylindrical part so that sleeve is pressed to the housing by means of a spring. At that, fluoroplastic insulating tube and a pin is installed in the contact housing. Pin is connected to cable clamp connected to the first cable head by means of logging information cable. Measuring instrument is suspended on the cable which is connected to non-return valve. Cylinder is fixed on the second cable head.

EFFECT: enlarging functional capabilities owing to performing the investigation without stopping the well by automatic coupling unit; improving its reliability.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: thermal manometric system includes the housing in which there located is at least one fluid pressure and temperature gauge the measuring part of which is connected to external part of the housing. Moisture metre, flow metre and electronics unit connected to tight current lead and sensors of thermal manometric system with flow metre and moisture metre are located in the housing as well. System is equipped with flow-through cylinder coupling connected to the housing and provided with possibility of being adjoined to tubing string. At that, in the coupling there located is tight current lead having the possibility of being connected to logging cable. At least one fluid pressure and temperature gauge the measuring part of which is connected to external surface of the coupling is located in the coupling as well.

EFFECT: improving measuring accuracy of fluid parameters both inside the tubing string and in annular space.

8 cl, 2 dwg

FIELD: mining industry.

SUBSTANCE: invention can be used in case of gas-lift operation of wells equipped by free piston-type installations. Invention envisages stopping well, connecting tube space and annular space in wellhead, recording bottom zone and wellhead pressures in tube and annular spaces, and computing well operation parameters using inflow curve plotted according to differences of bottom zone and wellhead pressures. Volume of produced fluid is found from potential output of formation and from condition of output of free piston. When comparing these volumes, parameters of well are computed in the base of minimum volume value.

EFFECT: optimized well operation.

2 dwg

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