Devices and methods for relieving drill string jamming using lateral vibration

Abstract

This invention relates to the field of drill string unsticking technology, specifically a device and method for unsticking downhole drill strings using lateral vibration. The method includes: after the device reaches the stuck point, opening the device's anchoring device to stabilize the device within the drill string; then, through a control module, driving the device's vibration execution module to generate vibration at a certain angle to the drill string direction; when the solid material in the annular space between the drill string and the wellbore is broken up and squeezed against the wellbore, the drill string loosens, achieving the purpose of unsticking the drill string. The device and method for unsticking downhole drill strings using lateral vibration described in this invention can significantly improve the success rate of unsticking downhole drill strings, reduce losses in drilling tools, instruments, materials, construction time, and personnel costs caused by stuck drill strings, improve drilling efficiency, and is an effective means of cost reduction and efficiency improvement; furthermore, it can reduce the labor intensity of employees and has no environmental pollution.

Description

Technical Field

[0001] This invention relates to the field of drill string unblocking technology, and is a device for unblocking downhole drill strings using lateral vibration, and also includes an unblocking method. Background Technology

[0002] In recent years, the average time to resolve drill string jamming in oil and gas well drilling is around 5%, and the time to resolve drill string jamming in newly opened and complex blocks can even exceed 20%. This may lead to a series of remedial operations such as explosive loosening, fishing, and well filling sidetracking. When the downhole drill string is equipped with expensive tools and instruments, the loss of a single well can be enormous.

[0003] Currently, the technical means to remove a stuck drill string include directly moving the drill string (lifting, lowering, rotating), moving it by impacting it longitudinally along the drill string with a shocker (upward impact, downward impact, reciprocating impact), and moving the drill string after soaking it in an unblocking agent (oil, water, light drilling fluid, unblocking agent fluid, or a mixture of two or more of these).

[0004] Regarding the shock-assisted unblocking technology, due to the irregularity of the drill string's outer diameter, when existing technologies and processes are used to move and shock along the longitudinal direction of the drill string, the solid material filling the annular space between the drill string and the well wall will be pushed upwards or downwards by the irregular drill string, drill bit, stabilizer, coupling, reducer, and other protruding parts. When there is enough solid material, as the extrusion force and number of times increase, it becomes denser and stronger, and the annular channel becomes increasingly blocked. The only way to remove the drill string above the stuck point is to use methods such as reverse threading, explosive unblocking, or cutting. Subsequent processing will result in a large amount of loss of drilling tools, instruments, materials, and construction time.

[0005] Chinese patent application CN104314500A discloses a downhole drill string unsticking device and method, which are performed as follows: First, when a stuck drill string occurs in an accident well, the maximum pressure difference is calculated; second, the isolation position is calculated based on the maximum pressure difference; third, a test trolley is used to loosen the drill pipe at the H-sealing point downhole, and the drill string is pulled out; fourth, the drill string is connected in the following order: angular drill pipe, drill pipe, downhole drill string unsticking device, while drilling, and coupling connector. It is lowered to the "fish head" position, and the suspended weight W1 of the large hook before coupling is recorded. Then, the "fish head" is connected. After successful alignment with the "fish head," the drill string is lowered by 5 to 10 tons, the pump is started, and the valve body moves down along the pressurized sealing track under hydraulic pressure to close the valve seat. After the downhole switch valve is closed, the pressure is increased to 15 MPa to 20 MPa. At this time, hydraulic pressure enters the rubber sleeve through the pressure transmission hole, the floating connector moves upward, and the rubber sleeve expands under hydraulic pressure to achieve setting and sealing. The pressure inside the drill string remains constant. As the drill string is pulled up, the pressure difference between the bottom of the well and the formation begins to decrease when the hook weight is W1. The pressure difference reaches its maximum when the hook weight is W2. At this point, the drill string may be released. Then, pressure is released, the valve body moves upward along the pressure-free opening track, the rubber sleeve returns to its original position, and the drill string is pulled up again to check if the release was successful. If not, this process is repeated until the release is successful. Here, W2 = W1 + W3 + F, where W3 is the weight of the mud inside and outside the drill string above the rubber sleeve after sealing, and F is the frictional force between the rubber sleeve and the inner wall of the casing. Using the described downhole drill string release device and method, release can be performed quickly, avoiding prolonged stationary time in the well that could complicate accidents and prevent damage to the formation, ensuring smooth subsequent operations.

[0006] Chinese patent application CN105952407A discloses a method and device for unsticking drill strings. The drill string includes a drill pipe string. The unsticking method includes: obtaining the location of the stuck point; lowering an injection device into the drill string based on the obtained location; injecting a heat source into the drill string through the injection device; after stopping the heat injection, injecting a cold source into the drill string through the injection device; determining whether the drill string is unsticked; if not, repeating the steps of injecting the heat source and the cold source until the drill string is unsticked. This unsticking method changes the traditional single-method approach of relying solely on moving the drill string when the drill string is stuck. It utilizes high or low temperatures to change the temperature difference of the cuttings or debris at the stuck point, causing the cuttings or debris to deform due to the temperature difference, thereby altering their stable accumulation structure and accelerating the deformation and destruction of the accumulated cuttings or debris at the stuck point, thus achieving the drilling unsticking operation. Summary of the Invention

[0007] This invention provides a device and method for releasing a stuck downhole drill string using lateral vibration, overcoming the shortcomings of the prior art. It can break up the solid material in the annular space between the drill string and the well wall, loosening the drill string and achieving the purpose of releasing the drill string from sticking.

[0008] One of the technical solutions of the present invention is achieved through the following measures: a device for releasing a stuck downhole drill string by using lateral vibration, comprising a power module, a positioning and measurement module, a guiding device, a vibration execution module and at least one set of anchoring devices, each set of anchoring devices comprising two anchoring devices, with a vibration execution module disposed between the two anchoring devices, the lowermost anchoring device being connected from top to bottom to the positioning and measurement module and the guiding device, and the power module being used to provide power for anchoring the anchoring devices and for the vibration execution module to vibrate.

[0009] The following are further optimizations and / or improvements to one of the above-mentioned technical solutions: The aforementioned device for relieving a stuck downhole drill string using lateral vibration also includes a tool control module. The tool control module includes a control module housing and a control circuit board. The control circuit board is fixed inside the control module housing and includes the control module.

[0010] The aforementioned power module is a hydraulic power module, which includes a hydraulic power module housing, an oil tank, and a hydraulic pump. The oil tank and the hydraulic pump are fixed inside the control module housing. The inlet end of the hydraulic pump is connected to the oil tank, and the outlet end of the hydraulic pump is connected to the main oil supply line, which is located inside the hydraulic power module housing.

[0011] Along the hydraulic oil flow direction, a check valve, a safety valve, and a pressure monitoring instrument are fixedly installed in sequence on the main oil supply line. Electric valves are fixedly installed between the check valve and the safety valve, between the safety valve and the pressure monitoring instrument, and between the pressure monitoring instrument and the outlet side of the main oil supply line.

[0012] Each of the above-mentioned anchoring devices includes an upper anchoring device and a lower anchoring device. Both the upper and lower anchoring devices employ an anchoring mechanism, which includes an anchoring housing, a limiting part, an anchoring piston, and a pushing cavity. An anchoring central shaft is axially arranged inside the anchoring housing. The right end of the anchoring central shaft is integrally connected to the inner wall of the left side of the outer side of the anchoring housing. The anchoring central shaft has a central shaft hole axially arranged. A limiting part is fixedly installed inside the anchoring housing at the left end of the anchoring central shaft. The limiting part, the anchoring central shaft, and the anchoring housing form a pushing cavity for anchoring. The piston is fitted inside the push chamber. A return spring is installed in the push chamber between the limiting part and the anchoring piston. At least one anchoring hole is provided on the anchoring shell corresponding to the inside and outside of the push chamber. An anchoring arm is provided at each anchoring hole. The anchoring arm includes an upper anchoring arm and a lower anchoring arm connected by a second pin. The upper anchoring arm is hinged to the anchoring shell by a first pin, and the lower anchoring arm is connected to the anchoring piston by a third pin. The limiting parts of the upper anchoring device and the lower anchoring device are both provided with oil supply channels that connect the main oil supply circuit to the push chamber.

[0013] The aforementioned vibration execution module includes a hollow vibration execution housing and a hydraulic motor. A hollow central shaft is axially arranged inside the vibration execution housing via a straightening mechanism. The oil inlet of the hydraulic motor is connected to the main oil supply circuit, and the oil outlet of the hydraulic motor is connected to the hollow position of the central shaft. The left end of the central shaft is coaxially connected to the output shaft of the hydraulic motor. An eccentric part is provided on the outer side of the middle of the central shaft, which can generate vibration at a certain angle with the drill string direction after rotation.

[0014] The aforementioned straightening mechanism includes a first straightening bearing, a second straightening bearing, and a thrust bearing. The first and second straightening bearings are spaced apart from left to right on the outer side of the central shaft at both ends of the eccentric portion. A first nut that can axially fix the inner ring of the first straightening bearing is fixedly sleeved on the central shaft. A second nut that can axially fix the inner ring of the second straightening bearing is fixedly sleeved on the central shaft. A thrust bearing is fixedly sleeved on the outer side of the central shaft between the eccentric portion and the second straightening bearing.

[0015] The above positioning and measurement module uses a magnetic locator.

[0016] The aforementioned magnetic positioner includes a magnetic positioning housing, a lower connector fixedly installed on the right end of the magnetic positioning housing, a pressure-bearing needle installed in the inner cavity of the magnetic positioning housing, a coil placed in the inner cavity of the magnetic positioning housing to the right of the pressure-bearing needle, the two ends of the coil abutting against the magnets respectively, and the pressure-bearing needle being electrically connected to the wires at both ends of the coil.

[0017] A guide device is fixedly connected to the right end of the aforementioned lower connector. The guide device consists of a cylindrical guide head.

[0018] The second technical solution of the present invention is achieved through the following measures: a method for unblocking a downhole drill string using the device described in the first technical solution that utilizes lateral vibration to release a stuck drill string, comprising: S1, the device that uses lateral vibration to release the stuck downhole drill string is lowered from the drill string channel, and the positioning and measurement module determines whether the device has reached the stuck point. S2, After determining that the device has reached the jamming point, open the anchoring device of the device to stabilize the device inside the drill string; S3, through the control module, drive the vibration execution module of the device to generate vibration in a direction with a certain angle to the drill string direction; S4. When the solid material in the annular space between the drill string and the well wall is broken up and squeezed against the well wall, the drill string is loosened, thus achieving the purpose of unblocking the drill string. S5, stop working, control the anchoring device to release the anchor via the control module, and retract the device.

[0019] The following are further optimizations and / or improvements to the second technical solution of the above invention: The above-mentioned card unlocking methods include: S1, the device that uses lateral vibration to release the stuck downhole drill string is lowered from the drill string channel, and the positioning and measurement module determines whether the device has reached the stuck point. S2, after determining that the device has reached the checkpoint position, the control module opens the electric valve and starts the hydraulic pump according to the instructions of the ground host computer. The hydraulic pump delivers hydraulic oil through the main oil supply line and sends hydraulic oil into the pushing chambers of the upper and lower anchoring devices. The hydraulic oil drives the anchoring piston to move to the right, so that the upper and lower anchoring arms extend outward through the anchoring holes and are anchored to the well wall, so that the device is stabilized in the drill string. S3 controls the working frequency of the hydraulic pump through the control module, thereby controlling the hydraulic oil pressure, which in turn controls the vibration frequency of the eccentric part of the vibration actuator module, causing vibration to occur at a certain angle to the drill string direction. S4. When the solid material in the annular space between the drill string and the well wall is broken up and squeezed against the well wall, the drill string is loosened, thus achieving the purpose of unblocking the drill string. S5, stop working. The hydraulic pump is stopped by the control module. The pistons of the upper and lower anchoring devices are reset by the action of the return spring. The upper and lower anchoring arms are retracted into the push cavity through the anchoring hole. The anchoring device is released and the device is retracted.

[0020] The device and method for releasing stuck downhole drill strings using lateral vibration described in this invention can significantly improve the success rate of releasing stuck downhole drill strings, reduce losses in drilling tools, instruments, materials, construction period, and personnel costs caused by stuck drill strings, improve drilling efficiency, and is an effective means of reducing costs and increasing efficiency; it can also reduce the labor intensity of employees and has no pollution to the environment.

[0021] Currently, drilling operations are increasingly extending to deeper and more complex formations, resulting in persistently high stuck drill string rates. Current technologies struggle to significantly improve the success rate of unsticking drill strings. The device and method of this invention can be implemented after the drill string has stuck, building upon existing unsticking techniques, or it can be implemented immediately after the drill string becomes stuck, thereby increasing the success rate of unsticking drill strings. It can be widely applied to unsticking drill string operations in all drilling industry sectors, and has significant and far-reaching implications for the strategic development of drilling and oil production. Attached Figure Description

[0022] Appendix Figure 1 This is a schematic diagram of the drill string unblocking process of the present invention; Appendix Figure 2 This is an overall schematic diagram of the device for relieving a stuck downhole drill string using lateral vibration as described in this invention; Appendix Figure 3 This is a schematic diagram of the main cross-sectional structure of the tool control module, hydraulic power module and upper anchoring device of the present invention; Appendix Figure 4 This is a schematic diagram of the front cross-sectional structure of the vibration execution module of the present invention; Appendix Figure 5 This is a schematic diagram of the front cross-sectional structure of the positioning and measurement module of the present invention; Appendix Figure 6 This is a flowchart of the card unlocking operation of the present invention.

[0023] The codes in the attached diagram are as follows: 1. Tool control module; 101. Control module housing; 102. Circuit control board; 2. Hydraulic power module; 201. Hydraulic power module housing; 202. Oil tank; 203. Hydraulic pump; 204. Check valve; 205. Solenoid valve; 206. Safety valve; 207. Pressure gauge; 208. Main oil supply line; 3. Upper anchor; 301. Upper anchor housing; 302. Hydraulic connection joint; 303. Return spring; 304. Anchor piston; 305. First pin; 306. Upper anchor arm; 307. Second pin; 308. Lower anchor arm; 309. Third pin; 310. Push chamber; 311. Limit switch. 312. Anchoring center shaft; 313. Center shaft hole; 314. Anchoring hole; 4. Vibration actuator module; 401. Vibration actuator housing; 402. Hydraulic motor; 403. First nut; 404. First centering bearing; 405. Center shaft; 406. Eccentric part; 407. Thrust bearing; 408. Second centering bearing; 409. Second nut; 5. Lower anchor; 6. Positioning measurement module; 601. Magnetic positioning housing; 602. Insertion hole; 603. Rubber sleeve; 604. Pressure pin; 605. Compression nut; 606. Coil; 607. Magnet; 608. Sealing ring; 609. Screw; 610. Lower connector; 7. Guide device. Detailed Implementation

[0024] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0025] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0026] The present invention will be further described below with reference to embodiments: Example 1: As Figure 1 , 2As shown, the device for releasing a stuck downhole drill string using lateral vibration includes a power module, a positioning and measurement module 6, a guiding device 7, a vibration execution module 4, and at least one set of anchoring devices. Each set of anchoring devices includes two anchoring devices, with a vibration execution module 4 positioned between the two anchoring devices. The bottommost anchoring device is connected from top to bottom to the positioning and measurement module 6 and the guiding device 7. The power module provides power for anchoring the anchoring devices and for the vibration execution module 4 to vibrate.

[0027] Example 2: As an optimization of the above examples, such as Figure 2 As shown, the device for relieving the jamming of the downhole drill string by using lateral vibration also includes a tool control module 1. The tool control module 1 includes a control module housing 101 and a control circuit board. The control circuit board is fixed inside the control module housing 101 and includes the control module.

[0028] Example 3: As an optimization of Example 1 above, such as Figure 3 As shown, the power module adopts a hydraulic power module 2, which includes a hydraulic power module housing 201, an oil tank 202, and a hydraulic pump 203. The oil tank 202 and the hydraulic pump 203 are fixed inside the control module housing 101. The inlet end of the hydraulic pump 203 is connected to the oil tank 202, and the outlet end of the hydraulic pump 203 is connected to the main oil supply line 208, which is located inside the hydraulic power module housing 201.

[0029] The power module can also use other existing, known, and commonly used electric drive modules or pneumatic drive modules. That is, in addition to hydraulic drive, this device can also use other existing, known, and commonly used pneumatic drive methods and electric drive methods.

[0030] Example 4: As an optimization of Example 3 above, such as Figure 3 As shown, along the hydraulic oil flow direction, a check valve 204, a safety valve 206, and a pressure monitoring instrument are sequentially fixedly installed on the main oil supply line 208. Electric valves are fixedly installed between the check valve 204 and the safety valve 206, between the safety valve 206 and the pressure monitoring instrument, and between the pressure monitoring instrument and the outlet side of the main oil supply line 208.

[0031] The electric valve can be a solenoid valve 205. The pressure monitoring instrument can be a pressure gauge 207. The electric valve is used for oil circuit switch control, the safety valve 206 is used for system pressure protection, and the pressure monitoring instrument is used for pressure monitoring.

[0032] Example 5: As an optimization of Example 1 above, such as Figure 2 , 3As shown, each anchoring device includes an upper anchoring device 3 and a lower anchoring device 5. Both the upper anchoring device 3 and the lower anchoring device 5 employ an anchoring mechanism. The anchoring mechanism includes an anchoring housing 301, a limiting part 311, an anchoring piston 304, and a pushing cavity 310. An anchoring center shaft 312 is axially arranged inside the anchoring housing 301. The right end of the anchoring center shaft 312 is integrated with the left inner wall of the anchoring housing 301. The anchoring center shaft 312 has a central shaft hole 313 axially arranged. The limiting part 311 is fixedly installed inside the anchoring housing 301 at the left end of the anchoring center shaft 312. The limiting part 311, the anchoring center shaft 312, and the anchoring housing 301 form a pushing cavity 310. The anchoring piston 304 is fitted into the housing. Inside the push cavity 310, a return spring 303 is provided between the limiting part 311 and the anchoring piston 304. At least one anchoring hole 314 is provided on the anchoring housing 301 corresponding to the inside and outside of the push cavity 310. An anchoring arm is provided at each anchoring hole 314. The anchoring arm includes an upper anchoring arm 306 and a lower anchoring arm 308 connected by a second pin 307. The upper anchoring arm 306 is hinged to the anchoring housing 301 by a first pin 305, and the lower anchoring arm 308 is connected to the anchoring piston 304 by a third pin 309. The limiting parts 311 of the upper anchoring device 3 and the lower anchoring device 5 are both provided with oil delivery channels that connect the main oil delivery circuit 208 to the push cavity 310.

[0033] The main oil pipeline 208 can be fixedly connected to the oil pipeline channel via a hydraulic connection joint 302.

[0034] When the anchoring piston 304 drives the upper anchoring arm 306 and the lower anchoring arm 308 to move left and right, the upper anchoring arm 306 and the lower anchoring arm 308 will open and extend out of the anchoring hole 314 or retract.

[0035] When the anchoring piston 304 performs the anchoring action, the anchoring piston 304 drives the return spring 303 to store energy. When the return spring 303 rebounds, it pulls the anchoring piston 304 to drive the upper anchoring arm 306 and the lower anchoring arm 308 to retract into the anchoring housing 301.

[0036] Example 6: As an optimization of Example 1 above, such as Figure 4 As shown, the vibration execution module 4 includes a hollow vibration execution housing 401 and a hydraulic motor 402. A hollow central shaft 405 is axially arranged inside the vibration execution housing 401 through a straightening mechanism. The oil inlet of the hydraulic motor 402 is connected to the main oil supply line 208, and the oil outlet of the hydraulic motor 402 is connected to the hollow position of the central shaft 405. The left end of the central shaft 405 is coaxially connected to the output shaft of the hydraulic motor 402. An eccentric part 406 is provided on the outer side of the middle part of the central shaft 405, which can generate vibration at a certain angle with the drill string direction after rotation.

[0037] The eccentric part 406 is an eccentric hammer structure that protrudes outward from the outer wall of the central shaft 405. After the hydraulic motor 402 is started, the central shaft 405 rotates, and the eccentric part 406 rotates accordingly, which can generate vibration perpendicular to the drill string or at a certain angle to the drill string direction.

[0038] This device is used in a vertical position. When it generates vibration perpendicular to the drill string, it is called lateral vibration.

[0039] Example 7: As an optimization of Example 6 above, such as Figure 4 As shown, the straightening mechanism includes a first straightening bearing 404, a second straightening bearing 408, and a thrust bearing 407. The first straightening bearing 404 and the second straightening bearing 408 are spaced apart from left to right on the outside of the central shaft 405 at both ends of the eccentric part 406. A first nut 403 that can axially fix the inner ring of the first straightening bearing 404 is fixedly sleeved on the central shaft 405. A second nut 409 that can axially fix the inner ring of the second straightening bearing 408 is fixedly sleeved on the central shaft 405. A thrust bearing 407 is fixedly sleeved on the outside of the central shaft 405 between the eccentric part 406 and the second straightening bearing 408.

[0040] Example 8: As an optimization of Example 1 above, the positioning measurement module 6 adopts a magnetic locator.

[0041] A magnetic locator is a conventional instrument used to measure the position of casing couplings inside a borehole. When the instrument moves through the well and passes the casing coupling, the thicker casing at the coupling changes the distribution of the magnetic field around the magnet, causing a change in the magnetic flux passing through coil 606 and generating an induced electromotive force. Recording the magnitude of the induced current yields a casing coupling curve. Based on the casing coupling curve, in conjunction with radiometric logging curves, the perforation position in the well can be accurately determined.

[0042] Example 9: As an optimization of Example 8 above, such as Figure 5 As shown, the magnetic positioner includes a magnetic positioning housing 601. A lower connector 610 is fixedly installed on the right end of the magnetic positioning housing 601. A pressure-bearing needle 604 is installed in the inner cavity of the magnetic positioning housing 601. A coil 606 is placed in the inner cavity of the magnetic positioning housing 601 on the right side of the pressure-bearing needle 604. The two ends of the coil 606 abut against the magnet 607 respectively. The pressure-bearing needle 604 is electrically connected to the wires at both ends of the coil 606.

[0043] The insertion hole 602 of the pressure needle 604 is used for connection with a cable. A clamping nut 605 is fixedly installed between the pressure needle 604 and the left end of the coil 606.

[0044] Example 10: As an optimization of Example 9 above, such as Figure 5 As shown, a guide device 7 is fixedly connected to the right end of the lower connector 610. The guide device 7 consists of a cylindrical guide head.

[0045] The guiding device 7 can be a conventional drilling guiding device. The guiding device 7 can adjust the direction of the vibrating tool in real time according to ground instructions to ensure that the drilling path follows the predetermined trajectory.

[0046] The right end of the control module housing 101 and the left end of the hydraulic power module housing 201 can be connected by threads or by welding.

[0047] The limiting part 311 is fixedly installed inside the anchoring housing 301 by a threaded connection. The right end of the hydraulic power module housing 201 and the left end of the anchoring housing 301 of the upper anchoring device 3 can be fixedly connected by a thread or by welding.

[0048] The right end of the anchoring housing 301 of the upper anchoring device 3 and the left end of the vibration actuator housing 401 can be connected by threads or by welding.

[0049] The right end of the vibration actuator housing 401 and the left end of the anchor housing of the lower anchoring device 5 can be connected by threads or by welding.

[0050] The right end of the anchoring housing of the lower anchoring device 5 and the left end of the magnetic positioning housing 601 can be connected by threads or by welding.

[0051] The right end of the magnetic positioning housing 601 and the left end of the lower connector 610 can be connected by threads or by welding.

[0052] The control circuit board may also include other conventionally configured modules, such as a power supply and communication module, a motor control module, an electric valve control module, and a data acquisition module. The control module is electrically connected to the power supply and communication module, the motor control module, and the electric valve control module, respectively. The power supply and communication module is connected to the host computer for communication. The data acquisition module is electrically connected to the pressure needle 604 of the magnetic positioner, pressure monitoring instruments, etc. The motor control module is electrically connected to the hydraulic motor 402, and the electric valve control module is electrically connected to the electric valve.

[0053] The control circuit board can be a standard PCB board. The core of its control module can be an ARM chip or other existing, publicly available processor. Commands from the host computer are transmitted via cable to the power supply and communication module, decoded, and received by the control module. The control module then sends commands to the motor control module and the electric valve control module based on the command content, thereby controlling the hydraulic motor 402 and the electric valve to execute corresponding actions and complete the corresponding functions. Collected data such as pressure and magnetic field strength can be transmitted to the surface via a logging cable.

[0054] The bottom of the control module housing 101 and the vibration actuator housing 401 may also be provided with left and right connected cable channels, so that the signal lines and cables of the control circuit board can pass through the cable channel at the bottom of the control module housing 101, the inner cavity of the power module housing, the central shaft hole 313 of the anchoring center shaft 312 of the upper anchoring device 3, the cable channel of the vibration actuator housing 401, and the central shaft hole of the anchoring center shaft of the lower anchoring device 5 in sequence, and extend into the magnetic positioning housing 601, thereby enabling the control circuit board to be connected to the hydraulic pump 203, electric valve, pressure gauge 207, magnetic positioner, etc.

[0055] Example 11: As Figure 6 As shown in the above embodiment, the method for unblocking a downhole drill string using lateral vibration to release a stuck drill string includes: S1, the device that uses lateral vibration to release the stuck downhole drill string is lowered from the drill string channel, and the positioning and measurement module 6 determines whether the device has reached the stuck point. S2, After determining that the device has reached the jamming point, open the anchoring device of the device to stabilize the device inside the drill string; S3, through the control module, drive the vibration execution module 4 of the device to generate vibration in a direction with a certain angle to the drill string direction; S4. When the solid material in the annular space between the drill string and the well wall is broken up and squeezed against the well wall, the drill string is loosened, thus achieving the purpose of unblocking the drill string. S5, stop working, control the anchoring device to release the anchor via the control module, and retract the device.

[0056] Example 12: As an optimization of Example 11 above, the card unlocking method includes: S1, the device that uses lateral vibration to release the stuck downhole drill string is lowered from the drill string channel, and the positioning and measurement module 6 determines whether the device has reached the stuck point. S2, after determining that the device has reached the checkpoint position, the control module opens the electric valve and starts the hydraulic pump 203 according to the instructions of the ground host computer. The hydraulic pump 203 delivers hydraulic oil through the main oil supply line 208 and sends hydraulic oil into the push chamber 310 of the upper anchoring device 3 and the lower anchoring device 5. The hydraulic oil drives the anchoring piston 304 to move to the right, so that the upper anchoring arm 306 and the lower anchoring arm 308 extend outward through the anchoring hole and anchor to the well wall, so that the device is stabilized in the drill string. S3, the working frequency of the hydraulic pump 203 is controlled by the control module, thereby controlling the hydraulic oil pressure, and thus controlling the vibration frequency of the eccentric part 406 of the vibration execution module 4, so as to generate vibration in a direction with a certain angle to the drill string direction. S4. When the solid material in the annular space between the drill string and the well wall is broken up and squeezed against the well wall, the drill string is loosened, thus achieving the purpose of unblocking the drill string. S5, stop working. The hydraulic pump 203 is stopped by the control module. The pistons of the upper anchoring device 3 and the lower anchoring device 5 are reset by the action of the return spring 303. The upper anchoring arm 306 and the lower anchoring arm 308 are retracted into the push cavity 310 through the anchoring hole 314. The anchoring device is released and the device is retracted.

[0057] The tool designed in this invention (i.e., the device that uses lateral vibration to release the stuck drill string in the well) generates vibrations that are perpendicular to or at a certain angle to the drill string direction. As the intensity and frequency of vibrations increase, the solid material filling the annular space between the drill string and the well wall in the wellbore will be continuously broken up and squeezed toward the well wall, and the drill string's space of movement will become larger and larger, so as to achieve the purpose of releasing the stuck drill string and significantly improve the success rate of releasing the stuck drill string based on the original technology.

[0058] The above technical features constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A device for releasing a stuck downhole drill string using lateral vibration, characterized in that, It includes a power module, a positioning and measurement module, a guiding device, a vibration execution module, and at least one set of anchoring devices. Each set of anchoring devices includes two anchoring devices, with a vibration execution module positioned between the two anchoring devices. The bottom anchoring device is connected to the positioning and measurement module and the guiding device from top to bottom. The power module is used to provide power for anchoring the anchoring devices and for the vibration execution module to vibrate.

2. The device for releasing a stuck downhole drill string using lateral vibration according to claim 1, characterized in that, It also includes a tool control module, which comprises a control module housing and a control circuit board. The control circuit board is fixed inside the control module housing and includes the control module; or / and, each set of anchoring devices includes an upper anchoring device and a lower anchoring device. Both the upper and lower anchoring devices employ an anchoring mechanism. The anchoring mechanism includes an anchoring housing, a limiting part, an anchoring piston, and a pushing cavity. An anchoring center shaft is axially arranged inside the anchoring housing. The right end of the anchoring center shaft is integrally connected to the inner wall of the left side of the outer side of the anchoring housing. The anchoring center shaft is axially provided with a center shaft hole. The left end of the anchoring center shaft is fixedly installed inside the anchoring housing. The device includes a limiting part, an anchoring center shaft, and an anchoring housing, which together form a push-abutment cavity. An anchoring piston is fitted inside the push-abutment cavity. A return spring is installed inside the push-abutment cavity between the limiting part and the anchoring piston. At least one anchoring hole is provided on the anchoring housing corresponding to the inside and outside of the push-abutment cavity. An anchoring arm is provided at each anchoring hole. The anchoring arm includes an upper anchoring arm and a lower anchoring arm connected by a second pin. The upper anchoring arm is hinged to the anchoring housing by a first pin, and the lower anchoring arm is connected to the anchoring piston by a third pin. The limiting parts of both the upper and lower anchoring devices are provided with oil delivery channels that connect the main oil delivery circuit to the push-abutment cavity.

3. The device for releasing a stuck downhole drill string using lateral vibration according to claim 2, characterized in that, The power module adopts a hydraulic power module, which includes a hydraulic power module shell, an oil tank, and a hydraulic pump. The oil tank and hydraulic pump are fixed inside the control module shell. The inlet end of the hydraulic pump is connected to the oil tank, and the outlet end of the hydraulic pump is connected to the main oil supply line, which is located inside the hydraulic power module shell.

4. The device for releasing a stuck downhole drill string using lateral vibration according to claim 3, characterized in that, Along the direction of hydraulic oil flow, a check valve, a safety valve, and a pressure monitoring instrument are fixedly installed in sequence on the main oil supply line. Electric valves are fixedly installed between the check valve and the safety valve, between the safety valve and the pressure monitoring instrument, and between the pressure monitoring instrument and the outlet side of the main oil supply line.

5. The device for releasing a stuck downhole drill string using lateral vibration according to any one of claims 1 to 4, characterized in that, The vibration execution module includes a hollow vibration execution housing and a hydraulic motor. A hollow central shaft is axially arranged inside the vibration execution housing via a straightening mechanism. The oil inlet of the hydraulic motor is connected to the main oil supply line, and the oil outlet of the hydraulic motor is connected to the hollow position of the central shaft. The left end of the central shaft is coaxially connected to the output shaft of the hydraulic motor. An eccentric part is provided on the outer side of the middle of the central shaft, which can generate vibration at a certain angle with the drill string direction after rotation.

6. The device for releasing a stuck downhole drill string using lateral vibration according to claim 5, characterized in that, The straightening mechanism includes a first straightening bearing, a second straightening bearing, and a thrust bearing. The first and second straightening bearings are spaced apart from left to right on the outer side of the central shaft at both ends of the eccentric part. A first nut that can axially fix the inner ring of the first straightening bearing is fixedly sleeved on the central shaft. A second nut that can axially fix the inner ring of the second straightening bearing is fixedly sleeved on the central shaft. A thrust bearing is fixedly sleeved on the outer side of the central shaft between the eccentric part and the second straightening bearing.

7. The device for releasing a stuck downhole drill string using lateral vibration according to claim 1, 2, 3, 4, or 6, characterized in that, The positioning and measurement module uses a magnetic locator.

8. The device for releasing a stuck downhole drill string using lateral vibration according to claim 7, characterized in that, The magnetic positioner includes a magnetic positioning housing, a lower connector fixedly installed on the right end of the magnetic positioning housing, a pressure-bearing needle fixedly installed in the inner cavity of the magnetic positioning housing, a coil placed in the inner cavity of the magnetic positioning housing to the right of the pressure-bearing needle, the two ends of the coil abutting against the magnets respectively, and the pressure-bearing needle being electrically connected to the wires at both ends of the coil; and / or, a guide device fixedly connected to the right end of the lower connector, the guide device consisting of a cylindrical guide head.

9. A method for unblocking a device for releasing a stuck downhole drill string using lateral vibration as described in any one of claims 1 to 8, characterized in that, include: S1, the device that uses lateral vibration to release the stuck downhole drill string is lowered from the drill string channel, and the positioning and measurement module determines whether the device has reached the stuck point. S2, After determining that the device has reached the jamming point, open the anchoring device of the device to stabilize the device inside the drill string; S3, through the control module, drive the vibration execution module of the device to generate vibration in a direction with a certain angle to the drill string direction; S4. When the solid material in the annular space between the drill string and the well wall is broken up and squeezed against the well wall, the drill string is loosened, thus achieving the purpose of unblocking the drill string. S5, stop working, control the anchoring device to release the anchor via the control module, and retract the device.

10. The card unlocking method according to claim 9, characterized in that, include: S1, the device that uses lateral vibration to release the stuck downhole drill string is lowered from the drill string channel, and the positioning and measurement module determines whether the device has reached the stuck point. S2, after determining that the device has reached the checkpoint position, the control module opens the electric valve and starts the hydraulic pump according to the instructions of the ground host computer. The hydraulic pump delivers hydraulic oil through the main oil supply line and sends hydraulic oil into the pushing chambers of the upper and lower anchoring devices. The hydraulic oil drives the anchoring piston to move to the right, so that the upper and lower anchoring arms extend outward through the anchoring holes and are anchored to the well wall, so that the device is stabilized in the drill string. S3 controls the working frequency of the hydraulic pump through the control module, thereby controlling the hydraulic oil pressure, which in turn controls the vibration frequency of the eccentric part of the vibration actuator module, causing vibration to occur at a certain angle to the drill string direction. S4. When the solid material in the annular space between the drill string and the well wall is broken up and squeezed against the well wall, the drill string is loosened, thus achieving the purpose of unblocking the drill string. S5, stop working. The hydraulic pump is stopped by the control module. The pistons of the upper and lower anchoring devices are reset by the action of the return spring. The upper and lower anchoring arms are retracted into the push cavity through the anchoring hole. The anchoring device is released and the device is retracted.

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