Telescoping short section and coring device with isotope sampling

Abstract

The present application relates to a telescopic short section and coring device, wherein the telescopic short section comprises a telescopic control module, a telescopic execution module and a lower joint module, wherein: the telescopic control module is connected with the telescopic execution module, and the telescopic control module is used for controlling the telescopic execution module to lengthen or shorten; the telescopic execution module is connected with the lower joint module, and the telescopic execution module lengthening or shortening can drive the lower joint module to move; a cable channel is arranged in the telescopic execution module, the cable channel is used for accommodating a cable, the length of the cable is matched with the lengthening amount of the telescopic execution module, and the cable is connected with the telescopic control module; and the lower joint module is used for being connected with a sampling and coring module. The telescopic control module can control the telescopic execution module to lengthen or shorten, and the lengthening or shortening of the telescopic execution module can drive the sampling and coring module to move, so that the purpose of sampling at the same depth and the same orientation can be achieved.

Description

Technical Field

[0001] This invention belongs to the field of formation testing and sampling technology, specifically relating to a telescoping sub and a co-sampling and coring device. Background Technology

[0002] Existing formation testing and sampling and formation core sampling belong to two different logging technologies. Therefore, two completely incompatible series of instruments are required to complete two series of logging operations. This results in long time occupied at the wellhead during the operation service process, increased risk of downhole instrument sticking, and high work intensity. Especially in the deepwater field, these factors cause a significant increase in operation costs. It is difficult to obtain cores and formation fluids at the same depth by running different series of instruments downhole multiple times. Furthermore, the downhole attitude of the instruments cannot be guaranteed, so it is even more impossible to obtain cores and formation fluids at the same location.

[0003] Therefore, the common practice is to connect the sampling system and the coring system with cables to achieve simultaneous coring and sampling in a single well run. Specifically, sampling can be performed first, and after sampling is completed, the coring system can be moved to the sampling point by adjusting the cable for coring. Although the cable adjustment can ensure that the sampling and coring are at the same height, the rotation of the instrument string may cause the sampling point and the coring point to not coincide. Therefore, although this method can achieve sampling and coring at the same depth, it cannot ensure that the sampling point and the coring point are in the same orientation.

[0004] To address this, existing technology discloses a co-sampling logging method. The logging system corresponding to this method includes downhole instruments that can be lowered into the wellbore. The downhole instruments include a control module, as well as a support module, a telescopic module, a coring module, and a probe module. The sampling point and the coring point are aligned by extending and retracting the telescopic module. However, this existing technology does not disclose the specific structure of the telescopic module.

[0005] Therefore, there is an urgent need for a telescopic sub, which can be adjusted to achieve the requirement of coring and sampling at the same depth and in the same orientation. Summary of the Invention

[0006] To address all or part of the aforementioned problems, the present invention aims to provide a telescopic sub and a co-positioning sampling and coring device. By setting a telescopic control module, the telescopic execution module can be controlled to extend or shorten, thereby enabling coring and sampling at the same depth and azimuth in a single well run.

[0007] According to one aspect of the present invention, a telescopic sub is provided, comprising a telescopic control module, a telescopic actuation module, and a lower connector module, wherein:

[0008] The telescopic control module is connected to the telescopic execution module, and the telescopic control module is used to control the telescopic execution module to extend or shorten.

[0009] The telescopic actuator module is connected to the lower connector module, and the telescopic actuator module can drive the lower connector module to move when it extends or shortens.

[0010] The telescopic execution module is equipped with a cable channel for accommodating cables. The length of the cables is matched with the extension amount of the telescopic execution module, and the cables are connected to the telescopic control module.

[0011] The lower connector module is used to connect to the sampling and core extraction module.

[0012] Furthermore, the telescopic actuator module includes a housing and a piston rod. The first end of the piston rod is located inside the housing and is slidably connected to the housing. The second end of the piston rod passes through the first end of the housing and is connected to the lower connector module. The first end of the housing and the piston rod are slidably connected. A first hydraulic oil chamber is formed between the first end of the housing and the first end of the piston rod.

[0013] The second end of the outer shell is connected to a telescopic control module. A second hydraulic oil chamber is formed between the telescopic control module and the first end of the piston rod. The telescopic control module controls the amount of hydraulic oil in the first hydraulic oil chamber and the amount of hydraulic oil in the second hydraulic oil chamber, thereby controlling the piston rod to extend or retract relative to the outer shell.

[0014] Furthermore, the cable channel is opened on the piston rod, the extension direction of the cable channel is parallel to the axial direction of the piston rod, and the cable channel passes through the piston rod. The telescopic control module is provided with a through hole for the cable to pass through.

[0015] The cable channel is provided with a central tube. The first end of the central tube is fixedly connected to the telescopic control module. The piston rod is slidably and sealed to the central tube. The second end of the central tube is located inside the piston rod.

[0016] The central tube has a central tube hole that extends along the axis of the central tube and passes through the central tube. The cable is disposed in the central tube hole, and both ends of the cable pass through the central tube hole.

[0017] Furthermore, the first end of the central tube is connected to a first cable fixing module, and the lower connector module is connected to a second cable fixing module. Both the first cable fixing module and the second cable fixing module are used to fix the cable, and the length of the cable between the first cable fixing module and the second cable fixing module matches the elongation of the telescopic execution module.

[0018] Furthermore, the first cable fixing module includes a first cable fixing seat, which is disposed inside the central tube. The end of the first cable fixing seat near the telescopic control module is connected to the first end of the central tube of the central tube. The first cable fixing seat is sleeved on the cable. A first conical pressure sleeve is provided between the first cable fixing seat and the cable. The smaller diameter end of the first conical pressure sleeve is disposed near the telescopic control module.

[0019] The other end of the first cable fixing seat is connected to a first external pressure sleeve. By adjusting the first external pressure sleeve, the first conical pressure sleeve can be deformed to surround the cable.

[0020] Furthermore, the second cable fixing module includes a second cable fixing seat, one end of which is connected to the lower connector module. The second cable fixing seat is sleeved on the cable. A second conical pressure sleeve is provided between the second cable fixing seat and the cable. The smaller diameter end of the second conical pressure sleeve is located close to the lower connector module. A second outer pressure sleeve is connected to the end of the second cable fixing seat away from the lower connector module. The second outer pressure sleeve is used to compress the second conical pressure sleeve so that the second conical pressure sleeve locks the cable.

[0021] Furthermore, a connecting ring is fixedly connected to the first end of the piston rod of the piston rod, the connecting ring is sleeved on the first end of the piston rod of the piston rod, and the connecting ring is in a sealed sliding connection with the outer shell.

[0022] The first end of the outer shell is sealed with an execution module plug, which is fitted onto the piston rod, and the execution module plug and the piston rod are sealed and slidably connected.

[0023] Furthermore, a displacement sensor is provided inside the piston rod, which is used to measure the displacement of the piston rod.

[0024] The piston rod has a conversion module sealed to its second end, and the conversion module is connected to the lower connector module.

[0025] Furthermore, the telescopic control module includes a control module base, on which a first two-position three-way solenoid valve and a second two-position three-way solenoid valve are provided. The oil inlets of the first two-position three-way solenoid valve and the second two-position three-way solenoid valve are both connected to hydraulic oil pipes. The working port of the first two-position three-way solenoid valve is connected to the first hydraulic oil chamber through a first hydraulic pipeline, and the working port of the second two-position three-way solenoid valve is connected to the second hydraulic oil chamber through a second hydraulic pipeline.

[0026] Both the first two-position three-way solenoid valve and the second two-position three-way solenoid valve are connected to the cable.

[0027] An interlock control unit is connected between the first hydraulic pipeline and the second hydraulic pipeline, and the interlock control unit is used to interlock control the first hydraulic pipeline and the second hydraulic pipeline;

[0028] Both the first hydraulic oil chamber and the second hydraulic oil chamber are connected to the cable channel through a pressure relief unit. The pressure relief unit is used to control the connection and disconnection between the first hydraulic oil chamber and the cable channel, and to control the connection and disconnection between the second hydraulic oil chamber and the cable channel.

[0029] Furthermore, the cable between the first cable fixing module and the second cable fixing module is a spiral cable;

[0030] A first cable fixing base is provided between the first end of the central tube and the telescopic control module. The outer wall of the first cable fixing base is threadedly connected to the inner wall of the central tube. The first cable fixing module is disposed inside the first cable fixing base and is connected to the first cable fixing base.

[0031] The first cable fixing base is provided with a return oil hole for hydraulic oil to flow through;

[0032] A second cable fixing base is provided between the second cable fixing module and the lower connector module. The outer wall of the second cable fixing base is connected to the lower connector module. The second cable fixing module is disposed inside the second cable fixing base and is connected to the second cable fixing base.

[0033] Furthermore, a pressure oil hole is provided on the piston rod, and the pressure oil hole extends through the first end of the piston rod;

[0034] The hydraulic oil pipe is disposed in the pressure oil hole and extends to connect with the oil inlet of the first two-position three-way solenoid valve and the second two-position three-way solenoid valve.

[0035] Hydraulic oil pipe sealing seats are provided between the hydraulic oil pipe and the piston rod, and between the hydraulic oil pipe and the control module base.

[0036] Furthermore, the control module base and the outer shell are provided with a first through hole that connects the working port of the first two-position three-way solenoid valve and the first hydraulic oil chamber, and the first hydraulic pipeline is arranged in the first through hole;

[0037] The control module base is provided with a second through hole that connects the working port of the second two-position three-way solenoid valve and the second hydraulic oil chamber, and the second hydraulic pipeline is arranged in the second through hole.

[0038] Furthermore, the interlock control unit includes a first check valve, a second check valve, a third hydraulic line, and a fourth hydraulic line, wherein:

[0039] The first check valve is disposed on the first hydraulic line and is configured to allow hydraulic oil to flow into the first hydraulic oil chamber through the first hydraulic line.

[0040] The second check valve is disposed on the second hydraulic line and is configured to allow hydraulic oil to flow into the second hydraulic oil chamber through the second hydraulic line;

[0041] One end of each of the third hydraulic line and the fourth hydraulic line is connected to the first hydraulic line between the first check valve and the first hydraulic oil chamber, and the other end of each of the third hydraulic line and the fourth hydraulic line is connected to the second hydraulic line between the second check valve and the second hydraulic oil chamber.

[0042] Two third check valves are installed on the fourth hydraulic pipeline, with the outlet ends of the two third check valves positioned close to each other.

[0043] The third hydraulic pipeline is equipped with a fourth check valve and a fifth check valve. The outlet end of the fourth check valve is connected to the first hydraulic pipeline, and the outlet end of the fifth check valve is connected to the second hydraulic pipeline. The control port of the fourth check valve is connected to the second hydraulic pipeline between the second check valve and the second two-position three-way solenoid valve. The control port of the fifth check valve is connected to the first hydraulic pipeline between the first check valve and the first two-position three-way solenoid valve.

[0044] Furthermore, a pressure gauge and a safety valve are connected to the fourth hydraulic line between the two third check valves;

[0045] The pressure relief unit is a third two-position three-way solenoid valve. The fourth hydraulic pipeline between the two third check valves is connected to the oil inlet of the third two-position three-way solenoid valve, and the working port of the third two-position three-way solenoid valve is connected to the cable channel.

[0046] Both the safety valve and the third two-position three-way solenoid valve are connected to the cable.

[0047] The control module base is connected to an upper connector module.

[0048] According to another aspect of the present invention, a cosine sampling and coring apparatus is provided, comprising a telescopic sub-section as described in any of the above claims, wherein a sampling and coring module is connected to the lower end of the telescopic sub-section, the sampling and coring module comprising a sampling module for sampling formation fluids and a coring module for coring formation fluids.

[0049] As can be seen from the above technical solution, the telescopic sub-section and co-sampling and coring device provided by the present invention have the following beneficial effects:

[0050] The telescopic control module of the present invention can control the extension or retraction of the telescopic execution module. The extension or retraction of the telescopic execution module can drive the movement of the core sampling module, thereby achieving the purpose of sampling at the same depth and in the same orientation. Compared with the existing method of depth adjustment through cable connection, there will be no problem of inconsistent sampling orientation and core sampling orientation caused by cable rotation. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of a telescopic sub-section according to an embodiment of the present invention;

[0052] Figure 2 This is a cross-sectional view of the upper connector module and the telescopic control module in an embodiment of the present invention.

[0053] Figure 3 This is a control principle diagram of the telescopic control module according to an embodiment of the present invention;

[0054] Figure 4 This is a schematic diagram of the interlock control unit according to an embodiment of the present invention;

[0055] Figure 5 This is a cross-sectional view of the telescopic control module portion of an embodiment of the present invention;

[0056] Figure 6 for Figure 5 A magnified view of a section at point A in the middle;

[0057] Figure 7 This is a cross-sectional view of the middle section of the outer casing and piston rod;

[0058] Figure 8 This is a cross-sectional view of the lower connector module.

[0059] Figure 9 A flowchart for sampling and coring using a telescopic sub;

[0060] The attached diagram is labeled as follows: Upper connector module 1, telescopic control module 2, telescopic execution module 3, conversion module 4, lower connector module 5, support leg 6, sampling module 7, and core sampling module 8;

[0061] Pressure gauge 20, control module base 21, hydraulic oil pipe 22, hydraulic oil pipe sealing seat 221, first two-position three-way solenoid valve 23, second two-position three-way solenoid valve 24, first hydraulic line 25, second hydraulic line 26, interlock control unit 27, first check valve 271, second check valve 272, third hydraulic line 273, fourth hydraulic line 274, third check valve 275, fourth check valve 276, fifth check valve 277, third two-position three-way solenoid valve 28, safety valve 29;

[0062] 31. Outer shell, 311 first end of outer shell, 312 second end of outer shell, 313 first through hole, 32. Piston rod, 321 first end of piston rod, 322 second end of piston rod, 323 fluid channel, 33 first hydraulic oil chamber, 34 second hydraulic oil chamber, 35 actuator plug, 36 cable, 361 cable channel, 37 central tube, 371 first end of central tube, 372 second end of central tube, 373 central tube hole, 38 first cable fixing base, 39 first cable fixing module, 391 first cable fixing seat, 392 first conical pressure sleeve, 393 first outer pressure sleeve, 301 displacement sensor;

[0063] Quick-turn nut 41, second cable fixing base 42, second cable fixing seat 43, second conical pressure sleeve 44, second outer pressure sleeve 45. Detailed Implementation

[0064] To better understand the purpose, structure, and function of this invention, a telescopic sub-section and a co-sampling and coring device of this invention will be described in further detail below with reference to the accompanying drawings.

[0065] This invention provides a telescopic sub-section, such as... Figure 1-9 As shown, the lower end of the telescopic sub is used to connect to the sampling and coring module 8. By controlling the extension or shortening of the telescopic sub, the sampling point and the coring point can be made to coincide, so that the obtained formation samples can be mutually corroborated. In addition, in order to prevent the instrument string from rotating during subsequent operations, the telescopic sub is connected to a support leg 6, which is used to contact the well wall to keep the instrument string and the well wall relatively fixed. Furthermore, in order to allow the sampling or coring fluid to pass through, the telescopic sub can be equipped with a fluid channel 323 as needed.

[0066] Specifically, such as Figure 1 The diagram illustrates a telescopic section according to an embodiment of the present invention. The telescopic section includes a telescopic control module 2, a telescopic execution module 3, and a lower connector module 5. The telescopic control module 2 is connected to the telescopic execution module 3 and controls the extension or retraction of the telescopic execution module 3. The telescopic execution module 3 is connected to the lower connector module 5, and its extension or retraction drives the lower connector module 5 to move. The telescopic execution module 3 has a cable channel 361 for accommodating a cable 36. The cable 36 is connected to the telescopic control module 2 to supply power, and the other end of the cable 36 is used to connect to an instrument at the bottom of the telescopic section. The length of the cable 36 matches the extension amount of the telescopic execution module 3. The lower connector module 5 is used to connect to a sampling and core-taking module.

[0067] In this embodiment, the telescopic control module 2 is used to control the telescopic execution module 3 to extend or shorten. The extension or shortening of the telescopic execution module 3 drives the lower connector module 5 to move. The lower connector module 5 is used to connect with the sampling and core sampling module, thereby realizing the purpose of sampling and core sampling at the same height and in the same direction by controlling the movement of the sampling and core sampling module through the telescopic control module 2.

[0068] In one specific embodiment, such as Figure 5 As shown, the telescopic execution module 3 specifically includes a housing 31 and a piston rod 32. The first end 321 of the piston rod 32 is located inside the housing 31 and is in a sealed sliding connection with the housing 31. The sealed sliding connection specifically means that the housing 31 and the piston rod 32 are sealed together, and the piston rod 32 can slide along the housing 31. For ease of description later, this is referred to as the first seal. The second end 322 of the piston rod 32 passes through the first end 311 of the outer shell of the housing 31 and connects to the lower connector module 5, thereby realizing the connection between the telescopic execution module 3 and the lower connector module 5. The first end 311 of the outer shell of the housing 31 and the piston rod 32 are in a sealed sliding connection, which is referred to as the second seal. Through the above connection, there are two seals between the piston rod 32 and the outer shell 31. Secondly, the piston rod 32 can slide along the outer shell 31. The area between the two seals, that is, the area between the first end 311 of the outer shell 31 and the first end 321 of the piston rod 32, forms the first hydraulic oil chamber 33.

[0069] like Figure 8As shown, in this embodiment, the lower connector module 5 is a standard lower connector module. The standard lower connector module has an external thread section and an internal thread section from top to bottom inside the wellbore. The external thread section is connected to the telescopic sub, and the internal thread section is connected to the sampling and coring module below. The lower connector module 5 and the telescopic actuator module 3 are connected by a piston rod 32. Therefore, in this embodiment, a conversion module 4 is provided between the piston rod 32 and the lower connector module 5. The upper end of the conversion module 4 is sealed and fixedly connected to the outer wall of the piston rod 32, and the lower end of the conversion module 4 is connected to the external thread section of the lower connector module 5. Therefore, the conversion module 4 in this embodiment has a structure with internal connecting holes at both ends.

[0070] Secondly, a quick-turn nut 41 is provided between the conversion module 4 and the piston rod 32. The quick-turn nut 41 is fitted onto the piston rod 32 and is threadedly connected to the conversion module 4. At the same time, the quick-turn nut 41 can be fitted into the groove of the piston rod 32 to fix the quick-turn nut 41 on the piston rod 32.

[0071] Specifically, such as Figure 7 As shown, the sampling and core-taking fluid channel 323 is set on the piston rod 32, and can pass through the upper connector module 1 and the lower connector module 5 as needed, thereby meeting the requirements for fluid flow inside the telescopic sub.

[0072] Correspondingly, such as Figure 5 As shown, the second end 312 of the outer shell 31 is connected to the telescopic control module 2. The second end 312 of the outer shell and the telescopic control module 2 are sealed together, which is referred to as the third seal. Therefore, a region is formed between the third seal and the first seal, which is also the second hydraulic oil chamber 34. Specifically, the second hydraulic oil chamber 34 is located between the telescopic control module 2 and the first end 321 of the piston rod of the piston rod 32.

[0073] By adjusting the hydraulic oil volume in the first hydraulic oil chamber 33 and the second hydraulic oil chamber 34, the movement of the piston rod 32 relative to the outer shell 31 can be adjusted, thereby achieving the extension or retraction of the telescopic section. Specifically, the telescopic control module 2 controls the piston rod 32 to extend or retract relative to the outer shell 31 by controlling the hydraulic oil volume in the first hydraulic oil chamber 33 and the second hydraulic oil chamber 34. When the piston rod 32 extends relative to the outer shell 31, the telescopic execution module 3 extends; when the piston rod 32 retracts relative to the outer shell 31, the telescopic execution module 3 retracts.

[0074] As described above, there are two seals between the piston rod 32 and the outer casing 31: a first seal and a second seal. Specifically, a connecting ring is fixedly connected to the first end 321 of the piston rod 32. The connecting ring is sleeved on the first end 321 of the piston rod 32, and the connecting ring and the outer casing 31 are in a sealed sliding connection. The first seal is formed by the sealed connection between the connecting ring and the outer casing 31. The connecting ring and the first end 321 of the piston rod can be an integrally formed structure.

[0075] The outer shell 31 has a sealed connection at its first end 311 to an actuator module plug 35. The actuator module plug 35 is fitted onto the piston rod 32, and the actuator module plug 35 and the piston rod 32 are in a sealed sliding connection. Specifically, the outer shell 31 and the actuator module plug 35 are fixedly connected by a threaded connection or other means, and are relatively sealed to each other. The actuator module plug 35 and the piston rod 32 are in a sealed sliding connection, thereby forming a second seal between the outer shell 31 and the piston rod 32 through the actuator module plug 35.

[0076] To facilitate understanding the extension or retraction length of the piston rod 32, thereby adjusting the sampling and core sampling to the same height, a displacement sensor 301 is provided inside the piston rod 32. The displacement sensor 301 is used to measure the displacement of the piston rod 32.

[0077] Since the extension or retraction of the telescopic section is achieved by extending or retracting the piston rod 32, the length of the cable 36 within the telescopic actuator module 3 needs to match the extension length of the telescopic section, ensuring that the cable 36 can still supply power to the power-consuming module even after the telescopic section has extended. Specifically, the cable channel 361 is located on the piston rod 32, and the extension direction of the cable channel 361 is parallel to the axial direction of the piston rod 32. The cable channel 361 passes through the piston rod 32, and the telescopic control module 2 has a through hole for the cable 36 to pass through. The cable 36 passes through the telescopic control module 2 to supply power to the power-consuming unit on the telescopic control module.

[0078] Since the cable channel 361 is located on and passes through the piston rod 32, and the second hydraulic oil chamber 34 is located between the piston rod 32 and the control module base 21 of the telescopic control module 2, a central tube 37 is provided in the cable channel 361 to prevent the hydraulic oil in the second hydraulic oil chamber 34 from entering the cable channel 361. The first end 371 of the central tube 37 is fixedly connected to the telescopic control module 2. Specifically, the first end 371 of the central tube 37 is fixedly connected to the control module base 21 of the telescopic control module 2. At the same time, it is also necessary to ensure that the piston rod 32 can slide along the central tube 37. Therefore, the piston rod 32 and the central tube 37 are slidably and sealingly connected, and the second end 372 of the central tube 37 is located inside the piston rod 32.

[0079] like Figure 5 As shown, in order to place the cable 36, the central tube 37 has a central tube hole 373 extending along the axial direction of the central tube 37 and penetrating the central tube 37. The cable 36 is disposed in the central tube hole 373, and both ends of the cable 36 penetrate the central tube hole 373. In this embodiment, the cable 36 is disposed in the central tube hole 373 of the central tube 37, and both ends of the cable 36 penetrate the central tube 37. The control module base 21 is provided with a through hole corresponding to the central tube 37. The through hole is used for the cable 36 to pass through and connect to the power module.

[0080] In one embodiment, such as Figure 6 As shown, the first end 371 of the central tube 37 is connected to a first cable fixing module 39, and the lower connector module 5 is connected to a second cable fixing module. Both the first cable fixing module 39 and the second cable fixing module are used to fix the cable 36. Specifically, one end of the cable 36 passes through the first cable fixing module 39 and is connected to the power module of the telescopic control module 2. The cable 36 is fixed by the first cable fixing module 39 after passing through it. The other end of the cable 36 passes through the second cable fixing module and is connected to the power module of the lower connector or other power modules. The cable 36 is fixed by the second cable fixing module after passing through it. Therefore, the situation where one end of the cable 36 is detached from the corresponding connector or the cable 36 is pulled off due to the extension of the telescopic section can be avoided.

[0081] The length of the cable 36 between the first cable fixing module 39 and the second cable fixing module is matched with the elongation of the telescopic actuation module 3. To ensure that the cable 36 can also elongate after the telescopic section extends, the length of the cable 36 between the first cable fixing module 39 and the second cable fixing module is matched with the elongation of the telescopic actuation module 3. Therefore, when the piston rod 32 extends, it drives the lower connector module 5 to move downwards. The downward movement of the lower connector module 5 drives the second cable fixing module to move downwards. Since the length of the cable 36 between the first cable fixing module 39 and the second cable fixing module is matched with the elongation of the telescopic actuation module 3, the cable 36 between the first cable fixing module 39 and the second cable fixing module is correspondingly stretched and extended.

[0082] As described above, the first cable fixing module 39 is used to fix the cable 36, specifically, as follows: Figure 6 As shown, the first cable fixing module 39 includes a first cable fixing seat 391, which is disposed inside the central tube 37. One end of the first cable fixing seat 391 near the control module base 21 of the telescopic control module 2 is connected to the first end 371 of the central tube 37. The first cable fixing seat 391 has a conical hole for the cable 36 to pass through, with the smaller end of the conical hole facing the control module base 21 of the telescopic control module 2. The first cable fixing seat 391 is sleeved on the cable 36. A first conical pressure sleeve 392 is provided between the first cable fixing seat 391 and the cable 36. This first conical pressure sleeve 392 is a rubber pressure sleeve, which can deform under force to lock the cable 36. The smaller diameter end of the first cable fixing seat 391 is located near the telescopic control module 2. The other end of the first cable fixing seat 391 is connected to the first outer pressure sleeve 393. By adjusting the first outer pressure sleeve 393, the first conical pressure sleeve 392 can be deformed to surround the cable 36. Specifically, the first outer pressure sleeve 393 should have a connecting part, which is threadedly connected to the other end of the first cable fixing seat 391. The first outer pressure sleeve 393 should also have a compression part, which is used to compress the first conical pressure sleeve 392. By adjusting the connecting part, the compression part can be driven to move closer to the first conical pressure sleeve 392. As the compression part gradually compresses the first conical pressure sleeve 392, the first conical pressure sleeve 392 can be deformed to surround the cable 36, thereby achieving the purpose of deforming the first conical pressure sleeve 392 to surround the cable 36 by adjusting the first outer pressure sleeve 393.

[0083] The second cable fixing module is used to fix cable 36, specifically, as follows: Figure 8As shown, the second cable fixing module includes a second cable fixing seat 43, one end of which is connected to the lower connector module 5. The first cable fixing seat 391 has a hole for the cable 36 to pass through. This hole is tapered, with the smaller end of the tapered hole facing the lower connector module 5. The second cable fixing seat 43 is sleeved on the cable 36. A second tapered pressure sleeve 44 is provided between the second cable fixing seat 43 and the cable 36. The second tapered pressure sleeve 44 is a rubber pressure sleeve, which can deform under force to lock the cable 36. The smaller diameter end of the second tapered pressure sleeve 44 is located close to the lower connector module 5, while the second cable fixing seat 43 is located away from the lower connector module 5. One end of the head module 5 is connected to a second outer pressure sleeve 45. The second outer pressure sleeve 45 is used to compress the second conical pressure sleeve 44 so that the second conical pressure sleeve 44 grips the cable 36. Specifically, the second outer pressure sleeve 45 should have a connecting part, which is threaded to the other end of the second cable fixing seat 43. The second outer pressure sleeve 45 should also have a compression part, which is used to compress the second conical pressure sleeve 44. By adjusting the connecting part, the compression part can be driven to move closer to the second conical pressure sleeve 44. As the compression part gradually compresses the second conical pressure sleeve 44, the second conical pressure sleeve 44 can be deformed to surround the cable 36, thereby achieving the purpose of deforming the second conical pressure sleeve 44 to surround the cable 36 by adjusting the second outer pressure sleeve 45.

[0084] In one specific embodiment, the telescopic control module 2 includes a control module base 21, which is fixedly and sealed to the outer shell 31, and the second hydraulic oil chamber 34 between the telescopic control module 2 and the first end 321 of the piston rod of the piston rod 32 is the area between the control module base 21 and the first end 321 of the piston rod of the piston rod 32.

[0085] As mentioned above, the upper end of the telescopic sub is the control module base 21 of the telescopic control module 2. Therefore, in order to facilitate the connection of the telescopic sub with other structures in the instrument string, such as the push-fit sub, the control module base 21 is connected to an upper connector module 1. The upper connector module 1 is a standard upper connector module, which is used to connect the upper end of the telescopic sub with other structures.

[0086] like Figure 9 As shown, the support leg 6 is connected to the control module base 21, and the support leg 6 can extend relative to the control module base 21 toward the well wall, so that the telescopic section where the control module base 21 is located and the well wall maintain relative rotation. In addition, there are three or more support legs 6, and they are distributed along the circumference of the control module base 21.

[0087] like Figure 3-4As shown, the telescopic control module 2 also includes a first two-position three-way solenoid valve 23 and a second two-position three-way solenoid valve 24. Both the first two-position three-way solenoid valve 23 and the second two-position three-way solenoid valve 24 are mounted on the control module base 21. Specifically, the oil inlets of both the first two-position three-way solenoid valve 23 and the second two-position three-way solenoid valve 24 are connected to the hydraulic oil pipe 22. The working port of the first two-position three-way solenoid valve 23 is connected to the first hydraulic oil chamber 33 via a first hydraulic line 25, and the working port of the second two-position three-way solenoid valve 24 is connected to the second hydraulic oil chamber 34 via a second hydraulic line 26. Therefore, the hydraulic oil in the hydraulic oil pipe 22 can enter the first hydraulic oil chamber 33 through the first two-position three-way solenoid valve 23 and the first hydraulic line 25, and the hydraulic oil in the hydraulic oil pipe 22 can also enter the second hydraulic oil chamber 34 through the second two-position three-way solenoid valve 24 and the second hydraulic line 26.

[0088] The first two-position three-way solenoid valve 23 and the second two-position three-way solenoid valve 24 are both connected to the cable 36, thereby supplying power to the first two-position three-way solenoid valve 23 and the second two-position three-way solenoid valve 24 through the cable 36.

[0089] Secondly, an interlock control unit 27 is connected between the first hydraulic line 25 and the second hydraulic line 26. The interlock control unit 27 is used to interlock control the first hydraulic line 25 and the second hydraulic line 26.

[0090] Both the first hydraulic oil chamber 33 and the second hydraulic oil chamber 34 are connected to the cable channel 361 through a pressure relief unit. The pressure relief unit is used to control the connection and disconnection between the first hydraulic oil chamber 33 and the cable channel 361, and to control the connection and disconnection between the second hydraulic oil chamber 34 and the cable channel 361. The hydraulic oil of the pressure relief unit returns through the cable channel 361.

[0091] As described above, the first cable fixing module 39 is connected to the first end 371 of the central tube of the central tube 37. In this embodiment, a first cable fixing base 38 is provided between the first end 371 of the central tube of the central tube 37 and the control module base 21 of the telescopic control module 2. The outer wall of the first cable fixing base 38 is threadedly connected to the inner wall of the central tube 37. The first cable fixing module 39 is disposed in the first cable fixing base 38 and is connected to the first cable fixing base 38. In addition, since the first hydraulic oil chamber 33 and the second hydraulic oil chamber 34 are both connected to the cable channel 361 through the pressure relief unit, that is, oil is discharged through the cable channel 361, the first cable fixing base 38 is provided with a return oil hole for hydraulic oil to flow through. The return oil hole is used for hydraulic oil flowing out from the pressure relief unit to pass through.

[0092] Similarly, a second cable fixing base 42 is provided between the second cable fixing module and the lower connector module 5. The outer wall of the second cable fixing base 42 is connected to the lower connector module 5. The second cable fixing module is disposed inside the second cable fixing base 42 and is connected to the second cable fixing base 42.

[0093] In addition, since the length of the cable 36 placed between the first cable fixing module 39 and the second cable fixing module needs to match the extension of the piston rod 32, in this embodiment, the cable 36 between the first cable fixing module 39 and the second cable fixing module is a spiral cable. The spiral cable can extend with the extension of the piston rod 32, and it can also retract when the piston rod 32 retracts.

[0094] In one embodiment, such as Figure 6 As shown, a pressure oil hole is provided on the piston rod 32, and the pressure oil hole extends through the first end 321 of the piston rod. The hydraulic oil pipe 22 is disposed in the pressure oil hole and extends to connect with the oil inlet of the first two-position three-way solenoid valve 23 and the second two-position three-way solenoid valve 24. The hydraulic oil pipe 22 is used to supply pressure oil for the movement of the piston rod 32.

[0095] Due to the presence of the pressure oil hole, in order to achieve the sealing of the second hydraulic oil chamber 34, hydraulic oil pipe sealing seats 221 are provided between the hydraulic oil pipe 22 and the piston rod 32, and between the hydraulic oil pipe 22 and the control module base 21. The sealing between the hydraulic oil pipe 22 and the piston rod 32, and between the hydraulic oil pipe 22 and the control module base 21 are achieved through the hydraulic oil pipe sealing seats 221.

[0096] In addition, since both the first hydraulic oil chamber 33 and the second hydraulic oil chamber 34 are connected to the cable channel 361 through the pressure relief unit, the cable channel 361 can be used to store the cable 36 and also to return oil.

[0097] Since the adjustment of the hydraulic oil volume in the first hydraulic oil chamber 33 is achieved by injecting oil into the first hydraulic oil chamber 33 through the first two-position three-way solenoid valve 23 and the first hydraulic pipeline 25, the control module base 21 and the outer shell are provided with a working port connecting the first two-position three-way solenoid valve 23 and the first hydraulic oil chamber 33, and the first hydraulic pipeline 25 is arranged in the first through hole 313.

[0098] Similarly, in order to adjust the amount of hydraulic oil in the second hydraulic oil chamber 34, the control module base 21 is provided with a second through hole that connects the working port of the second two-position three-way solenoid valve 24 and the second hydraulic oil chamber 34. The second hydraulic pipeline 26 is arranged in the second through hole, so that oil can be injected into the second hydraulic oil chamber 34 through the second hydraulic pipeline 26 in the second through hole.

[0099] In one embodiment, such as Figure 4 As shown, the interlock control unit 27 includes a first check valve 271, a second check valve 272, a third hydraulic line 273, and a fourth hydraulic line 274, wherein:

[0100] The first check valve 271 is disposed on the first hydraulic line 25, and the first check valve 271 is configured to allow hydraulic oil to flow into the first hydraulic oil chamber 33 through the first hydraulic line 25.

[0101] The second check valve 272 is disposed on the second hydraulic line 26, and the second check valve 272 is configured to allow hydraulic oil to flow into the second hydraulic oil chamber 34 through the second hydraulic line 26;

[0102] One end of the third hydraulic line 273 and the fourth hydraulic line 274 are both connected to the first hydraulic line 25 between the first check valve 271 and the first hydraulic oil chamber 33, and the other end of the third hydraulic line 273 and the fourth hydraulic line 274 are both connected to the second hydraulic line 26 between the second check valve 272 and the second hydraulic oil chamber 34.

[0103] Two third check valves 275 are provided on the fourth hydraulic pipeline 274, and the two third check valves 275 are configured with their outlet ends close to each other.

[0104] The third hydraulic line 273 is equipped with a fourth check valve 276 and a fifth check valve 277. The outlet end of the fourth check valve 276 is connected to the first hydraulic line 25, and the outlet end of the fifth check valve 277 is connected to the second hydraulic line 26. The control port of the fourth check valve 276 is connected to the second hydraulic line 26 between the second check valve 272 and the second two-position three-way solenoid valve 24. The control port of the fifth check valve 277 is connected to the first hydraulic line 25 between the first check valve 271 and the first two-position three-way solenoid valve 23.

[0105] Based on the previous embodiment, in order to detect the pressure of the oil circuit in a timely manner and ensure the safety of the oil circuit, a pressure gauge 20 and a safety valve 29 are connected to the fourth hydraulic line 274 between the two third check valves 275. The pressure gauge 20 is used to display the corresponding pressure magnitude, and the opening pressure of the safety valve 29 is 3500 psi.

[0106] The pressure relief unit is a third two-position three-way solenoid valve 28. The fourth hydraulic line 274 between the two third check valves 275 is connected to the oil inlet of the third two-position three-way solenoid valve 28. The working port of the third two-position three-way solenoid valve 28 is connected to the cable channel 361.

[0107] Both the safety valve 29 and the third two-position three-way solenoid valve 28 are connected to the cable 36. In addition, both the safety valve 29 and the third two-position three-way solenoid valve 28 are connected to the cable 36, thereby supplying power to the safety valve 29 and the third two-position three-way solenoid valve 28 through the cable 36.

[0108] Specifically, the telescopic control module 2 is provided with a through hole for the cable 36 to pass through. The cable 36 passes through the through hole on the telescopic control module 2 and connects to the first two-position three-way solenoid valve 23, the second two-position three-way solenoid valve 24, the third two-position three-way solenoid valve 28 and the safety valve 29, thereby supplying power to the above components.

[0109] Specifically, when the inlet and working port of the first two-position three-way solenoid valve 23 are connected, the hydraulic oil in the hydraulic oil pipe 22 enters the first hydraulic oil chamber 33 through the first hydraulic line 25. The pressure in the first hydraulic oil chamber 33 increases, thereby pushing the piston rod 32 to compress the second hydraulic oil chamber 34. The hydraulic oil in the second hydraulic oil chamber 34 is squeezed out. Under the control of the hydraulic oil in the first hydraulic line 25, the fifth check valve 277 is reversed. Therefore, the hydraulic oil squeezed out of the second hydraulic oil chamber 34 re-enters the first hydraulic oil chamber 33 through the fifth check valve 277 and the fourth check valve 276. When the third two-position three-way solenoid valve 28 is turned on, the hydraulic oil squeezed out of the second hydraulic oil chamber 34 flows into the cable channel 361 through the corresponding third check valve 275 and the third two-position three-way solenoid valve 28, thereby returning oil through the cable channel 361.

[0110] In addition, this invention also discloses a co-sampling and coring device, including the telescopic section described in any of the above embodiments. The lower end of the telescopic section is connected to a sampling and coring module. The sampling and coring module includes a sampling module for sampling formation fluid and a coring module for coring formation fluid.

[0111] The telescopic section of this invention, used in the sampling and coring module, enables the sampling point and coring point to be at the same height and orientation by adjusting the telescopic section. By obtaining samples at the same orientation and height, the obtained strata can be mutually corroborated.

[0112] Specifically, the upper end of the telescopic sub is connected to other instrument subs via the upper connector module 1, and the lower end of the telescopic sub is connected to the sampling and core-taking module via the lower connector. The sampling and core-taking module specifically includes a sampling module 7 and a core-taking module 8. Figure 9 For example, the lower end of the telescopic sub is connected to the sampling module 7, the lower end of the sampling module 7 is connected to the core sampling module 8, and the upper end of the telescopic sub is connected to other downhole instrument subs, such as the push-in sub. Based on the above connection method, when performing sampling and core sampling operations, if the sampling operation is performed first, such as... Figure 9 As shown, the instrument string is lowered to the target location, and the sampling module 7 is controlled to perform sampling. Then, by controlling the telescopic sub to shorten, the core sampling module 8 at the lower end of the sampling module 7 is moved to the target location, and the core sampling module 8 is controlled to perform core sampling. If core sampling is performed first, the instrument string is lowered to the target location, the core sampling module 8 is controlled to perform core sampling, and then the sampling module 7 at the upper end of the core sampling module 8 is lowered to the target location by controlling the telescopic sub to perform sampling. In addition, to prevent the instrument string from rotating in subsequent operations, the telescopic sub is connected to a support leg 6, which is used to contact the well wall to keep the instrument string and the well wall relatively fixed. Furthermore, in order to allow the sampling or core sampling fluid to pass through, the telescopic sub should also be provided with a fluid channel 323.

[0113] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0114] Furthermore, the terms "a," "two," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0115] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A telescopic sub, characterized in that, It includes a telescopic control module, a telescopic execution module, and a lower connector module, wherein: The telescopic control module is connected to the telescopic execution module, and the telescopic control module is used to control the extension or retraction of the telescopic execution module. The telescopic actuator module is connected to the lower connector module. The extension or retraction of the telescopic actuator module can drive the lower connector module to move. The telescopic execution module has a cable channel for accommodating cables. The length of the cables matches the extension of the telescopic execution module, and the cables are connected to the telescopic control module. The lower connector module is used to connect to the sampling and core-taking module; The telescopic actuator module includes a housing and a piston rod. The first end of the piston rod is located inside the housing and is in a sealed sliding connection with the housing. The second end of the piston rod passes through the first end of the housing and is connected to the lower connector module. The first end of the housing and the piston rod are in a sealed sliding connection, forming a first hydraulic oil chamber. The second end of the housing is connected to a telescopic control module, forming a second hydraulic oil chamber. The telescopic control module controls the extension or retraction of the piston rod relative to the housing by controlling the amount of hydraulic oil in the first and second hydraulic oil chambers. The telescopic control module includes a control module base, on which a first two-position three-way solenoid valve and a second two-position three-way solenoid valve are provided. The oil inlets of the first two-position three-way solenoid valve and the second two-position three-way solenoid valve are both connected to hydraulic oil pipes. The working port of the first two-position three-way solenoid valve is connected to the first hydraulic oil chamber through a first hydraulic pipeline, and the working port of the second two-position three-way solenoid valve is connected to the second hydraulic oil chamber through a second hydraulic pipeline. Both the first and second position three-way solenoid valves and the second and second position three-way solenoid valves are connected to cables. An interlock control unit is connected between the first hydraulic line and the second hydraulic line. The interlock control unit is used to interlock and control the first hydraulic line and the second hydraulic line. Both the first hydraulic oil chamber and the second hydraulic oil chamber are connected to the cable channel through a pressure relief unit. The pressure relief unit is used to control the connection and disconnection between the first hydraulic oil chamber and the cable channel, and to control the connection and disconnection between the second hydraulic oil chamber and the cable channel. The interlock control unit includes a first check valve, a second check valve, a third hydraulic line, and a fourth hydraulic line, wherein: A first check valve is disposed on a first hydraulic line and is configured to allow hydraulic oil to flow into a first hydraulic oil chamber through the first hydraulic line. The second check valve is located on the second hydraulic line and is configured to allow hydraulic oil to flow into the second hydraulic oil chamber through the second hydraulic line. One end of the third hydraulic line and the fourth hydraulic line are both connected to the first hydraulic line between the first check valve and the first hydraulic oil chamber, and the other end of the third hydraulic line and the fourth hydraulic line are both connected to the second hydraulic line between the second check valve and the second hydraulic oil chamber. The fourth hydraulic line is equipped with two third check valves, with the outlet ends of the two third check valves positioned close to each other. The third hydraulic line is equipped with a fourth check valve and a fifth check valve. The outlet end of the fourth check valve is connected to the first hydraulic line, and the outlet end of the fifth check valve is connected to the second hydraulic line. The control port of the fourth check valve is connected to the second hydraulic line between the second check valve and the second two-position three-way solenoid valve. The control port of the fifth check valve is connected to the first hydraulic line between the first check valve and the first two-position three-way solenoid valve. A pressure gauge and a safety valve are connected to the fourth hydraulic line between the two third check valves; The pressure relief unit is a third two-position three-way solenoid valve. The fourth hydraulic line between the two third check valves is connected to the oil inlet of the third two-position three-way solenoid valve. The working port of the third two-position three-way solenoid valve is connected to the cable channel. Both the safety valve and the third two-position three-way solenoid valve are connected to cables; The control module base is connected to the upper connector module.

2. The telescopic subsection according to claim 1, characterized in that, The cable channel is opened on the piston rod, the extension direction of the cable channel is parallel to the axial direction of the piston rod, and the cable channel passes through the piston rod. The telescopic control module is provided with a through hole for the cable to pass through. The cable channel is provided with a central tube. The first end of the central tube is fixedly connected to the telescopic control module. The piston rod is slidably and sealed to the central tube. The second end of the central tube is located inside the piston rod. The central tube has a central tube hole that extends along the axis of the central tube and passes through the central tube. The cable is disposed in the central tube hole, and both ends of the cable pass through the central tube hole.

3. The telescopic sub section according to claim 2, characterized in that, The first end of the central tube is connected to a first cable fixing module, and the lower connector module is connected to a second cable fixing module. Both the first cable fixing module and the second cable fixing module are used to fix the cable. The length of the cable between the first cable fixing module and the second cable fixing module is matched with the elongation of the telescopic execution module.

4. The telescopic subsection according to claim 3, characterized in that, The first cable fixing module includes a first cable fixing seat, which is disposed inside the central tube. The end of the first cable fixing seat near the telescopic control module is connected to the first end of the central tube of the central tube. The first cable fixing seat is sleeved on the cable. A first conical pressure sleeve is provided between the first cable fixing seat and the cable. The smaller diameter end of the first conical pressure sleeve is disposed near the telescopic control module. The other end of the first cable fixing seat is connected to a first external pressure sleeve. By adjusting the first external pressure sleeve, the first conical pressure sleeve can be deformed to surround the cable.

5. The telescopic subsection according to claim 3, characterized in that, The second cable fixing module includes a second cable fixing seat, one end of which is connected to the lower connector module. The second cable fixing seat is sleeved on the cable. A second conical pressure sleeve is provided between the second cable fixing seat and the cable. The smaller diameter end of the second conical pressure sleeve is located close to the lower connector module. A second outer pressure sleeve is connected to the end of the second cable fixing seat away from the lower connector module. The second outer pressure sleeve is used to compress the second conical pressure sleeve so that the second conical pressure sleeve locks the cable.

6. The telescopic subsection according to claim 1, characterized in that, A connecting ring is fixedly connected to the first end of the piston rod of the piston rod. The connecting ring is sleeved on the first end of the piston rod of the piston rod, and the connecting ring is in a sealed sliding connection with the outer shell. The first end of the outer shell is sealed with an execution module plug, which is fitted onto the piston rod, and the execution module plug and the piston rod are sealed and slidably connected.

7. The telescopic sub section according to claim 1, characterized in that, The piston rod is equipped with a displacement sensor, which is used to measure the displacement of the piston rod. The piston rod has a conversion module sealed to its second end, and the conversion module is connected to the lower connector module.

8. The telescopic subsection according to claim 3, characterized in that, The cable between the first cable fixing module and the second cable fixing module is a spiral cable; A first cable fixing base is provided between the first end of the central tube and the telescopic control module. The outer wall of the first cable fixing base is threadedly connected to the inner wall of the central tube. The first cable fixing module is disposed inside the first cable fixing base and is connected to the first cable fixing base. The first cable fixing base is provided with a return oil hole for hydraulic oil to flow through; A second cable fixing base is provided between the second cable fixing module and the lower connector module. The outer wall of the second cable fixing base is connected to the lower connector module. The second cable fixing module is disposed inside the second cable fixing base and is connected to the second cable fixing base.

9. The telescopic subsection according to claim 1, characterized in that, The piston rod is provided with a pressure oil hole, which extends through the first end of the piston rod. The hydraulic oil pipe is disposed in the pressure oil hole and extends to connect with the oil inlet of the first two-position three-way solenoid valve and the second two-position three-way solenoid valve. Hydraulic oil pipe sealing seats are provided between the hydraulic oil pipe and the piston rod, and between the hydraulic oil pipe and the control module base.

10. The telescopic subsection according to claim 1, characterized in that, The control module base and the outer shell are provided with a first through hole that connects the working port of the first two-position three-way solenoid valve and the first hydraulic oil chamber, and the first hydraulic pipeline is arranged in the first through hole. The control module base is provided with a second through hole that connects the working port of the second two-position three-way solenoid valve and the second hydraulic oil chamber, and the second hydraulic pipeline is arranged in the second through hole.

11. A cosine sampling and core collection device, characterized in that, The telescopic sub-section includes the telescopic sub-section according to any one of claims 1-10, wherein the lower end of the telescopic sub-section is connected to a sampling and coring module, the sampling and coring module including a sampling module for sampling formation fluids and a coring module for coring formations.

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