A downhole electric bidirectional jarring device and an electrically-controlled jarring fishing method

Abstract

The application belongs to the technical field of oil extraction device, and discloses a downhole electric bidirectional jarring device and an electric control jarring fishing method, wherein the device comprises a cable head sealing cabin, a weight rod cabin, an intermediate joint, a pressure balance cabin, a power cabin and a vibration transmission cabin which are connected in sequence; a circuit control component is further arranged in the cable head sealing cabin; the power cabin comprises a motor cabin, a linear motor and a coupling; a jarring rod is arranged in the vibration transmission cabin; the circuit control component is electrically connected with the linear motor; one end of the motor cabin is fixedly connected with the pressure balance cabin; the other end of the motor cabin is fixedly connected with the vibration transmission cabin; the linear motor is arranged in the motor cabin; and the linear motor is drivingly connected with the jarring rod through the coupling. The application controls the power cabin through the circuit control component to complete the construction operation, and no other complex mechanical operation is needed, so that the operation is simple and the labor intensity is low; the linear motor directly drives the jarring rod, so that single or multiple bidirectional jarring and bidirectional continuous jarring can be realized.

Description

Technical Field

[0001] This invention belongs to the technical field of oil production equipment, and specifically relates to a downhole electric bidirectional shock device and an electrically controlled shock delivery and retrieval method. Background Technology

[0002] In major oilfields, well sites encounter various downhole tools that need to be deployed and retrieved, such as water injection nozzles, switch sleeves in stratified oil production operations, or plugs in stratified testing operations. These types of operations are generally completed using wireline retrieval.

[0003] However, when the well depth becomes very deep, the success rate of wireline retrieval will be greatly reduced. The reason is that when the depth is too great, the elongation of the wireline becomes very large, and the stroke of the mechanical shocker in the tool string becomes very difficult to control.

[0004] For example, if the shock absorber has a stroke of 1 meter and the plugging depth is 3500 meters, the wireline can extend or retract by 10 meters. Surface personnel have difficulty determining whether the shock absorber is fully extended or not. If it is pulled too far, the lower end of the tool will be pulled away from its setting position, preventing it from being properly seated. Conversely, if the stroke is insufficient, the pin on the delivery tool will be difficult to shear, leading to operation failure. Therefore, judging the downhole situation relies entirely on the operator's experience, resulting in a significantly reduced success rate.

[0005] Therefore, a device and its supporting process are needed that can overcome the influence of well depth on operations, not rely on the operator's experience, and can carry out reliable shock operations, and can be used in both upward and downward shock directions, and is easy to operate. Summary of the Invention

[0006] To address the above problems, this invention provides a downhole electrically powered bidirectional shock device and an electrically controlled shock-assisted deployment and retrieval method, employing the following technical solution:

[0007] A downhole electric bidirectional shock device includes a cable head sealing chamber, a weighted rod chamber, an intermediate joint, a pressure balance chamber, a power chamber, and a vibration transmission chamber connected in sequence.

[0008] The cable head sealed chamber is equipped with a circuit control component. The power chamber includes a motor compartment, a linear motor, and a coupling. The vibration transmission chamber is equipped with a vibration rod. The circuit control component is electrically connected to the linear motor. One end of the motor compartment is fixedly connected to the pressure balance chamber, and the other end of the motor compartment is fixedly connected to the vibration transmission chamber. The linear motor is located in the motor compartment and is driven by the vibration rod through the coupling.

[0009] Furthermore, the cable head sealing chamber includes a lifting ring, an upper connector, a cable sealing connector, and a connector locking ring;

[0010] The lifting ring is fixedly connected to the top of the upper connector. The upper connector has a receiving cavity inside. The cable sealing connector and the connector locking ring are disposed in the receiving cavity. The outer side of the connector locking ring is threaded to the inner wall of the upper connector. The connector locking ring presses the cable sealing connector onto the top of the receiving cavity.

[0011] Furthermore, the cable head sealing chamber also includes a sealing ring, which is disposed between the inner wall of the cable sealing joint and the upper joint.

[0012] Furthermore, the receiving cavity is provided with a first stepped hole at one end near the lifting ring. The first stepped hole includes a first circular hole and a second circular hole. The first circular hole is located near the lifting ring, and the diameter of the second circular hole is larger than the diameter of the first circular hole. The connection between the first circular hole and the second circular hole has a first axial limiting surface.

[0013] The cable sealing joint has a stepped portion at one end near the lifting ring. The stepped portion includes a first cylindrical portion and a second cylindrical portion. The outer diameter of the second cylindrical portion is larger than the outer diameter of the first cylindrical portion. The connection between the first cylindrical portion and the second cylindrical portion has a second axial limiting surface. The first cylindrical portion is clearance-fitted with the first circular hole, and the second cylindrical portion is clearance-fitted with the second circular hole. The second axial limiting surface abuts against the first axial limiting surface. The end of the joint locking ring near the lifting ring abuts against the end of the cable sealing joint away from the lifting ring.

[0014] Furthermore, the receiving cavity is provided with a third axial limiting surface that is flush with the end of the cable sealing joint away from the lifting ring, and the end of the joint locking ring near the lifting ring abuts against the third axial limiting surface and the end of the cable sealing joint away from the lifting ring.

[0015] Furthermore, the circuit control component includes a circuit board and a pin sealing connector, and the weighted bar cabin includes a weighted bar outer sleeve;

[0016] Wherein, one end of the weight-reinforcing bar sleeve is threadedly connected to the end of the upper connector away from the lifting ring, the other end of the weight-reinforcing bar sleeve is threadedly connected to the intermediate connector, the pin sealing connector is disposed inside the weight-reinforcing bar sleeve and located at the connection between the weight-reinforcing bar sleeve and the upper connector, the outer side of the pin sealing connector is threadedly connected to the inner wall of the weight-reinforcing bar sleeve, and the circuit board is disposed in the receiving cavity and located between the connector locking ring and the pin sealing connector.

[0017] Furthermore, the inside of the weighted rod sleeve is provided with a fourth axial limiting surface near the upper connector, one side of the pin sealing connector abuts against the circuit board, and the other side of the pin sealing connector abuts against the fourth axial limiting surface.

[0018] Furthermore, the weighted bar cabin also includes a counterweight ring, which is disposed inside the outer sleeve of the weighted bar. A fifth axial limiting surface is also provided inside the weighted bar cabin. One side of the counterweight ring abuts against the fifth axial limiting surface, and the other side of the counterweight ring abuts against the intermediate joint.

[0019] Furthermore, the pressure equalization chamber includes a breathing chamber outer shell, an upper piston, a central tube, a first spring, a lower piston, and a second spring;

[0020] One end of the breathing chamber outer sleeve is threadedly connected to the intermediate joint, and the other end of the breathing chamber outer sleeve is fixedly connected to the power compartment. A limit ring is provided inside the breathing chamber outer sleeve. The central tube is disposed inside the breathing chamber outer sleeve and is threadedly connected to the inner side of the limit ring. The upper piston, the first spring, the lower piston, and the second spring are sequentially movably sleeved on the outside of the central tube. The upper piston is disposed close to the limit ring, and the second spring is located between the power compartment and the lower piston.

[0021] Furthermore, one end of the motor compartment is threadedly connected to the outer casing of the breathing chamber.

[0022] Furthermore, the vibration transmission chamber also includes a limiting joint, a connecting head, and a lower outer casing;

[0023] One end of the limiting joint is threaded to the motor compartment, and the other end of the limiting joint is threaded to the lower outer sleeve. The lower outer sleeve is fitted over the outside of the vibration rod. One end of the vibration rod is connected to the coupling via the connector, and the other end of the vibration rod is located outside the lower outer sleeve.

[0024] Furthermore, a first limiting boss is provided on the vibrating rod near the connector, and a first limiting recess is provided on one end of the connector near the vibrating rod. One end of the vibrating rod is inserted into the first limiting recess, and the end face of the connector near the vibrating rod abuts against the first limiting boss.

[0025] The limiting joint is sleeved on the outside of the connector. The connector has a second limiting boss on the outside of one end near the vibrating rod. The inner side of the limiting joint has a second limiting recess that matches the second limiting boss. The end face of the second limiting boss near the coupling abuts against the bottom surface of the second limiting recess.

[0026] Furthermore, a sixth axial limiting surface is provided inside the motor compartment near the pressure balance chamber, one side of the linear motor abuts against the sixth axial limiting surface, and the coupling is threadedly connected to the connector.

[0027] Furthermore, the lower outer sleeve is provided with a second stepped hole, which includes a third circular hole and a fourth circular hole. The third circular hole is located close to the limiting joint, and the diameter of the third circular hole is larger than the diameter of the fourth circular hole. The connection between the third circular hole and the fourth circular hole has a seventh axial limiting surface. The end of the vibration rod away from the connector passes through the fourth circular hole, and the first limiting boss is located inside the third circular hole.

[0028] Furthermore, the vibration transmission chamber also includes a third spring, which is sleeved on the vibration rod. One end of the third spring contacts the side of the first limiting boss away from the connector, and the other end of the third spring contacts the seventh axial limiting surface.

[0029] Furthermore, the counterweight ring has a first through hole at its center.

[0030] Furthermore, the breathing chamber outer cover is provided with multiple second through holes.

[0031] Furthermore, the wall surface of the lower jacket is provided with a plurality of third through holes along the circumferential direction at the position of the third circular hole, and each of the third through holes is arranged radially along the wall surface of the lower jacket and communicates with the third circular hole.

[0032] Furthermore, one or more weighted bar cabins are provided, and the multiple weighted bar cabins are connected in series by threaded connections.

[0033] This invention also provides an electrically controlled shock-drop method for retrieval, based on the aforementioned downhole electrically driven bidirectional shock device, comprising the following steps:

[0034] Connect the cable of the cable car to the underground electric bidirectional shock device, and fix the tool to be deployed on the vibration transmission chamber to form a tool string;

[0035] The tool string is lowered into the well via a cable under the cable car. When the tool string reaches the set depth, the electric bidirectional shock device in the well is controlled to shock the tool to be deployed, thus installing the tool in the designated position.

[0036] The downhole electric bidirectional shock device is brought out of the wellhead by lifting the cable with a cable car.

[0037] The beneficial effects of this invention are:

[0038] 1. The shock device of this invention can control the power compartment to complete the construction operation by sending commands through the circuit control component. There are no other complicated mechanical operations, and the operation is simple and the labor intensity is low.

[0039] 2. In the embodiment of the present invention, the power chamber of the shock device directly drives the shock rod through a linear motor, which can achieve single or multiple downward shocks, single or multiple upward shocks, and bidirectional continuous shocks.

[0040] 3. In the embodiment of the present invention, the power chamber of the shock device uses a linear motor as the power source and electrical energy as the source of shock energy. The shock force directly depends on the amount of electrical energy, making the shock force controllable. The shock force is directly applied to the shock rod, resulting in direct force and high efficiency.

[0041] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 A schematic diagram of a downhole electric bidirectional shock device according to an embodiment of the present invention is shown;

[0044] Figure 2 A schematic diagram of the retracted state of a downhole electric bidirectional shock device according to an embodiment of the present invention is shown;

[0045] Figure 3 A schematic diagram of the extended state of a downhole electric bidirectional shock device according to an embodiment of the present invention is shown;

[0046] Figure 4 A schematic diagram of the overall process for electrically controlled shock-dropping and retrieval using a downhole electric bidirectional shock-dropping device according to an embodiment of the present invention is shown.

[0047] Figure 5 A schematic diagram of a downhole electric bidirectional shock device being lowered into the wellhead according to an embodiment of the present invention is shown;

[0048] Figure 6This diagram illustrates a downhole electrically powered bidirectional shock device before it is lowered to a predetermined depth according to an embodiment of the present invention.

[0049] Figure 7 A schematic diagram showing the start of the vibration deployment of a downhole electric bidirectional vibration device according to an embodiment of the present invention is shown;

[0050] Figure 8 A schematic diagram showing the completion of the vibration deployment of a downhole electric bidirectional vibration device according to an embodiment of the present invention is shown;

[0051] Figure 9 A schematic diagram of the operation interface of a downhole electric bidirectional shock device according to an embodiment of the present invention is shown.

[0052] In the diagram: 1. Downhole electric bidirectional vibration device; 2. Cable head sealing chamber; 3. Weight rod chamber; 4. Intermediate joint; 5. Pressure balance chamber; 6. Power chamber; 7. Vibration transmission chamber; 8. Circuit control components; 9. Lifting ring; 10. Upper joint; 11. Sealing ring; 12. Cable sealing joint; 13. Joint locking ring; 14. Receiving cavity; 15. First step hole; 16. First axial limiting surface; 17. Stepped portion; 18. Second axial limiting surface; 19. Sealing groove; 20. Third axial limiting surface; 21. Circuit board; 22. Pin sealing joint; 23. Weight rod outer sleeve; 24. Counterweight ring; 25. Fourth axial limiting surface; 26. Fifth axial limiting surface; 27. 28. Breathing chamber outer jacket; 29. ​​Upper piston; 30. Central tube; 31. First spring; 32. Lower piston; 33. Second spring; 34. Second through hole; 35. Limiting ring; 36. Motor compartment; 37. Linear motor; 38. Coupling; 39. Limiting joint; 40. Connecting head; 41. Vibration rod; 42. Lower outer jacket; 43. Third spring; 44. First limiting boss; 45. First limiting recess; 46. Second limiting boss; 47. Second limiting recess; 48. Sixth axial limiting surface; 49. Second stepped hole; 50. Seventh axial limiting surface; 51. Third through hole; 52. Cable; 53. Oil pipe; 54. Lowering tool; 55. Blocker; 56. Working cylinder. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] It should be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," "longitudinal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings.

[0055] This invention provides a downhole electric bidirectional shock device and an electrically controlled shock delivery and retrieval method, which can perform shock operations quickly and reliably, and can be widely used in the delivery or retrieval of various types of small downhole tools.

[0056] like Figure 1 As shown, a downhole electric bidirectional shock device 1 includes a cable head sealing chamber 2, a weighted rod chamber 3, an intermediate joint 4, a pressure balance chamber 5, a power chamber 6, and a vibration transmission chamber 7 connected sequentially from top to bottom. The cable head sealing chamber 2 is also equipped with a circuit control component 8.

[0057] like Figure 2 As shown, for example, the cable head sealing chamber 2 mainly serves the functions of electrical connection and sealing. The cable head sealing chamber 2 includes a lifting ring 9, an upper connector 10, a sealing ring 11, a cable sealing connector 12, and a connector locking ring 13. The lifting ring 9 is fixedly connected to the top of the upper connector 10. For example, the upper connector 10 is made of stainless steel and has a supporting function.

[0058] For example, the lifting ring 9 is welded to the top of the upper connector 10. The lifting ring 9 is used for lifting the shock device and can bear the entire weight of the device. The crane's slings can pass through this lifting ring 9 to move the shock device onto the vehicle. It can also be used as a handle for workers during manual handling.

[0059] like Figure 1 As shown, the upper connector 10 has a receiving cavity 14 inside. The cable sealing connector 12 and the connector locking ring 13 are disposed in the receiving cavity 14. The outer side of the connector locking ring 13 is threadedly connected to the inner wall of the upper connector 10. The connector locking ring 13 presses the cable sealing connector 12 onto the top of the receiving cavity 14. The connector locking ring 13 plays a locking role to prevent the cable sealing connector 12 from moving up and down.

[0060] The cable sealing joint 12 is a special joint for cable 51. It serves as an electrical connection and can also connect the gravity load of this device to cable 51.

[0061] The sealing ring 11 is disposed between the inner wall of the cable sealing joint 12 and the upper joint 10. The sealing ring 11 isolates the fluid in the well because the fluid in the well contains a large number of charged ions, which would damage the circuit if they came into contact with the circuit.

[0062] like Figure 2 and Figure 3 As shown, for example, the receiving cavity 14 is provided with a first stepped hole 15 at one end near the lifting ring 9. The first stepped hole 15 includes a first circular hole and a second circular hole. The first circular hole is located near the lifting ring 9, and the diameter of the second circular hole is larger than the diameter of the first circular hole. The connection between the first circular hole and the second circular hole has a first axial limiting surface 16. The cable sealing joint 12 is provided with a stepped portion 17 at one end near the lifting ring 9. The stepped portion 17 includes a first cylindrical portion and a second cylindrical portion. The outer diameter of the second cylindrical portion is larger than the outer diameter of the first cylindrical portion. The connection between the first cylindrical portion and the second cylindrical portion has a second axial limiting surface 18. The first cylindrical portion is clearance-fitted with the first circular hole, and the second cylindrical portion is clearance-fitted with the second circular hole. The second axial limiting surface 18 abuts against the first axial limiting surface 16.

[0063] The end of the connector locking ring 13 near the lifting ring 9 abuts against the end of the cable sealing connector 12 away from the lifting ring 9, thereby pressing the cable sealing connector 12 onto the top of the receiving cavity 14.

[0064] like Figure 1 As shown, for example, a sealing groove 19 is provided on the outer side of the second cylindrical portion along the circumferential direction, and a sealing ring 11 is disposed in the sealing groove 19.

[0065] For example, the cavity 14 is provided with a third axial limiting surface 20 that is flush with the end of the cable sealing joint 12 away from the lifting ring 9. The end of the joint locking ring 13 near the lifting ring 9 abuts against the third axial limiting surface 20 and the end of the cable sealing joint 12 away from the lifting ring 9. The third axial limiting surface 20 limits the joint locking ring 13.

[0066] The circuit control component 8 is connected to cable 51 at the top and to power section at the bottom. Its main functions are to receive signals, convert voltage, protect circuits, and control power.

[0067] Because there is a large amount of formation fluid in the well, the formation fluid has a great buoyancy on the shock device. In addition, there is friction between the device and the well wall. Therefore, it is necessary to add extra weight to the device by adding weight to the rod chamber 3 so that the device can be successfully lowered.

[0068] For example, one or more weighted bar compartments 3 can be set. The specific number of weighted bar compartments 3 can be determined according to the actual working conditions. When multiple weighted bar compartments 3 are set, they are connected in series by threaded connections.

[0069] like Figure 2As shown, for example, the circuit control component 8 includes a circuit board 21 and a pin sealing connector 22. For example, the weighted bar compartment 3 includes a weighted bar sleeve 23. One end of the weighted bar sleeve 23 is threadedly connected to the end of the upper connector 10 away from the lifting ring 9, and the other end of the weighted bar sleeve 23 is threadedly connected to the intermediate connector 4. For example, the end of the weighted bar sleeve 23 near the upper connector 10 is provided with an external thread, the end of the upper connector 10 away from the lifting ring 9 is provided with an internal thread, the end of the weighted bar sleeve 23 near the intermediate connector 4 is provided with an internal thread, and the end of the intermediate connector 4 near the weighted bar sleeve 23 is provided with an external thread.

[0070] The pin sealing connector 22 is located inside the weighted bar outer sleeve 23 and at the connection between the weighted bar outer sleeve 23 and the upper connector 10. The outer side of the pin sealing connector 22 is threadedly connected to the inner wall of the weighted bar outer sleeve 23.

[0071] The circuit board 21 is disposed in the receiving cavity 14 and located between the connector locking ring 13 and the pin sealing connector 22. For example, the inside of the weight bar sleeve 23 is provided with a fourth axial limiting surface 25 near the upper connector 10. One side of the pin sealing connector 22 abuts against the circuit board 21, and the other side of the pin sealing connector 22 abuts against the fourth axial limiting surface 25, thereby fixing the circuit board 21 between the connector locking ring 13 and the pin sealing connector 22.

[0072] like Figure 2 As shown, for example, the weighted bar compartment 3 also includes a counterweight ring 24, which is disposed inside the weighted bar outer sleeve 23. The weighted bar compartment 3 is also provided with a fifth axial limiting surface 26. One side of the counterweight ring 24 abuts against the fifth axial limiting surface 26, and the other side of the counterweight ring 24 abuts against the intermediate joint 4 to fix the counterweight ring 24.

[0073] For example, the counterweight ring 24 can be made of iron, or lead in special cases. The center of the counterweight ring 24 has a first through hole for an electrical wire to pass through. The counterweight ring 24 can be adjusted according to different types or methods of operation, and in some special cases, it can even be removed to meet process requirements.

[0074] like Figure 2 As shown, for example, the pressure balance chamber 5 includes a breathing chamber outer jacket 27, an upper piston 28, a central tube 29, a first spring 30, a lower piston 31, and a second spring 32. One end of the breathing chamber outer jacket 27 is threadedly connected to the intermediate joint 4, and the other end of the breathing chamber outer jacket 27 is fixedly connected to the power chamber 6.

[0075] The breathing chamber outer shell 27 serves as a protective shell and a connection. For example, multiple second through holes 33 are provided on the breathing chamber outer shell 27 along the circumference, allowing well fluid from outside the shock device to flow into the interior of the shock device.

[0076] A limiting ring 34 is provided inside the breathing chamber outer sleeve 27. The central tube 29 is located inside the breathing chamber outer sleeve 27 and is threadedly connected to the inner side of the limiting ring 34. The upper piston 28, the first spring 30, the lower piston 31, and the second spring 32 are sequentially movably sleeved on the outside of the central tube 29. The upper piston 28 is located close to the limiting ring 34, and the second spring 32 is located between the power compartment 6 and the lower piston 31.

[0077] Both the upper piston 28 and the lower piston 31 can slide axially along the central tube 29, while isolating the well fluid and preventing it from mixing with the hydraulic oil in the shock device. As the depth of the shock device increases, the well fluid pressure increases, which pushes the upper piston 28 or the lower piston 31 to move, thereby squeezing the hydraulic oil at the other end. When the hydraulic oil pressure rises to equal the well fluid pressure, the upper piston 28 or the lower piston 31 stops moving. In addition to balancing the pressure, the hydraulic oil inside the shock device can also cool the power compartment 6.

[0078] This device employs a pressure balancing chamber 5 to adjust the pressure of the power chamber 6 and the vibration transmission chamber 7 to the same pressure as the external fluid, thereby maintaining a balanced state where the internal and external pressures are equal. The first spring 30 and the second spring 32 act as buffers to prevent damage to the upper piston 28, the lower piston 31, or internal parts during sudden pressure changes.

[0079] like Figure 2 As shown, for example, the power compartment 6 includes a motor compartment 35, a linear motor 36, and a coupling 37. The vibration transmission compartment 7 is equipped with a shock rod 40. The circuit control component 8 is electrically connected to the linear motor 36. One end of the motor compartment 35 is fixedly connected to the pressure balance compartment 5. For example, one end of the motor compartment 35 is threadedly connected to the breathing chamber outer sleeve 27. The other end of the motor compartment 35 is fixedly connected to the vibration transmission compartment 7. The linear motor 36 is installed inside the motor compartment 35 and is connected to the shock rod 40 through the coupling 37.

[0080] The motor compartment 35 serves as a protective shell and connection. The interior of the motor compartment 35 is filled with hydraulic oil, which is the source of the vibration power for the linear motor 36. The coupling 37 acts as an intermediary connecting the linear motor 36 internally and externally, transmitting kinetic energy to the vibration rod 40.

[0081] The power compartment 6 is the source of the shock force. It can convert electrical energy into magnetic field force, and then the magnetic force into mechanical kinetic energy. In this embodiment of the invention, a linear motor 36 is used. Unlike a rotary motor, the linear motor 36 can drive the coupling 37 to make a linear motion in the left and right direction, driving the shock rod 40 to move.

[0082] The main function of circuit board 21 is to transmit signals up and down, including the acquisition of position data information and the conversion of high-voltage power to supply components. Circuit board 21 includes a drive circuit for linear motor 36, which controls the running speed, running direction and running position of linear motor 36. The drive circuit also has an overload protection function. When the running current of linear motor 36 is too large or the running temperature is too high, it can stop linear motor 36, thereby playing a protective role.

[0083] The circuit is not allowed to come into contact with any fluid inside the well. If the fluid inside the well enters the circuit board 21, it will cause damage to the circuit. The pin sealing head establishes a sealed electrical connection between the circuit and the linear motor 36 below, thereby controlling the operation of the linear motor 36.

[0084] The drive circuit controls the linear motor 36, which converts electrical energy into mechanical motion. The linear motor 36 is controlled by the operator's instructions to complete a specific pattern of linear motion, thereby driving the shock rod 40 to produce a shocking action.

[0085] Wellbore is typically filled with a large amount of formation fluid, usually formation brine or crude oil. Therefore, when the shock device is lowered into the well, it is compressed by the formation fluid. Based on a normal pressure coefficient of 10 MPa / km, when the shock device reaches 3000 meters, it will experience a pressure of 30 MPa. This enormous pressure will compress the shock rod 40, preventing it from vibrating. To address the issue of internal and external pressure difference, this embodiment of the invention incorporates a pressure balance chamber 5, adjusting the pressure in the vibration transmission chamber 7 and the power chamber 6 to match the external fluid pressure. This maintains a balanced state of internal and external pressure, allowing the shock rod 40 to easily extend or retract, performing the shock action.

[0086] like Figure 2 As shown, the vibration transmission chamber 7 is a component that transmits the vibration motion, and it can transmit the motion generated by the linear motor 36. For example, the vibration transmission chamber 7 also includes a limiting joint 38, a connecting head 39, and a lower outer sleeve 41, wherein one end of the limiting joint 38 is threadedly connected to the motor chamber 35, and the other end of the limiting joint 38 is threadedly connected to the lower outer sleeve 41.

[0087] The lower outer sleeve 41 is fitted on the outside of the vibration rod 40. One end of the vibration rod 40 is connected to the coupling 37 via the connector 39, and the other end of the vibration rod 40 is located outside the lower outer sleeve 41.

[0088] The limiting connector 38 serves as a connection and also limits the leftward movement of the connector 39, thus keeping the shock rod 40 within a reasonable travel range. The connector 39 serves as a connection, transmitting the shock motion to the shock rod 40.

[0089] The vibration rod 40 receives the transmitted mechanical kinetic energy and transmits it outwards. The lower end of the vibration rod 40 is equipped with a threaded connection, which can be used to connect appropriate work tools according to user needs. The lower outer sleeve 41 serves as the outer shell, while the vibration rod 40 also functions to straighten and center the shaft.

[0090] like Figure 3 As shown, the vibrating rod 40 is provided with an annular first limiting boss 43 near the connector 39, and the connector 39 is provided with a first limiting recess 44 near one end of the vibrating rod 40. One end of the vibrating rod 40 is inserted into the first limiting recess 44, and the end face of the connector 39 near the vibrating rod 40 abuts against the first limiting boss 43.

[0091] The limiting joint 38 is sleeved on the outside of the connector 39. The connector 39 has an annular second limiting boss 45 on the outside of the end near the vibrating rod 40. The inner side of the limiting joint 38 has a second limiting recess 46 that matches the second limiting boss 45. The end face of the second limiting boss 45 near the coupling 37 abuts against the bottom surface of the second limiting recess 46.

[0092] For example, inside the motor compartment 35, a sixth axial limiting surface 47 is provided near the pressure balance chamber 5. One side of the linear motor 36 abuts against the sixth axial limiting surface 47, and the other side of the linear motor 36 is connected to the coupling 37 for transmission. The coupling 37 is threadedly connected to the connector 39.

[0093] like Figure 3 As shown, for example, the vibration transmission chamber 7 also includes a third spring 42, and the lower outer sleeve 41 is provided with a second stepped hole 48. The second stepped hole 48 includes a third round hole and a fourth round hole. The third round hole is located near the limiting joint 38. The diameter of the third round hole is larger than the diameter of the fourth round hole. The connection between the third round hole and the fourth round hole has a seventh axial limiting surface 49.

[0094] The vibrating rod 40 has one end away from the connector 39 that passes through the fourth circular hole. The first limiting boss 43 of the vibrating rod 40 is located in the third circular hole. The third spring 42 is sleeved on the vibrating rod 40. One end of the third spring 42 is in contact with the side of the first limiting boss 43 away from the connector 39, and the other end of the third spring 42 is in contact with the seventh axial limiting surface 49. The function of the third spring 42 is to provide an elastic force to accelerate the retraction of the vibrating rod 40.

[0095] For example, multiple third through holes 50 are evenly distributed circumferentially on the wall surface of the lower jacket 41 at the position of the third circular hole. Each third through hole 50 is radially arranged along the wall surface of the lower jacket 41 and communicates with the third circular hole. External fluid can flow into the inside of the shock device through the third through hole 50, thereby playing a role in preventing vacuum.

[0096] The working principle of the downhole electric bidirectional shock device 1 of the present invention is as follows: The shock device is carried out and lowered by a cable 51. The shock behavior is controlled by an electrical signal. After the circuit board 21 of the circuit control compartment receives the lifting command, it drives the linear motor 36 to push the coupling 37 downward. The coupling 37 pushes the connector 39 downward, so the shock rod 40 shocks downward, thereby causing the tool carried at the lower end of the shock rod 40 to vibrate. The reverse shock is the same, except that the control command is an upward shock command.

[0097] A method for electrically controlled shock-based retrieval, based on the aforementioned downhole electrically powered bidirectional shock-based device 1, includes the following steps:

[0098] S1. Connect the cable 51 of the cable car to the underground electric bidirectional shock device 1, and fix the tool to be deployed on the vibration transmission chamber 7 to form a tool string, as follows:

[0099] Taking the blocker 54 as an example, such as Figure 4 As shown, the cable car enters the well site and is positioned appropriately according to the actual conditions. The top pulley for cable 51 is installed and hooked onto the small hook of the workover rig. The bottom pulley for cable 51 is installed and secured to the wellhead crossbar with a wire rope. The blowout preventer (BOP) for cable 51 is installed. Cable 51 is threaded through the bottom pulley, top pulley, and BOP. Cable 51 is connected to the downhole electrically controlled bidirectional shock device and the matching plugger 54, along with the downhole tool 53. The tool string from top to bottom is: cable 51 + electric shock device + downhole tool 53 + plugger 54. After powering on, the signal is monitored on the computer. If there is no signal, the connection is rechecked until the signal is normal.

[0100] S2, such as Figure 5 As shown, the tool string is lowered into the well via cable 51 below the cable 51 vehicle. When the tool string reaches the set depth, the downhole electric bidirectional shock device 1 is controlled to shock the tool to be deployed, thus installing the tool in the designated position. Taking the deployment of the plugger 54 as an example, the specific details are as follows:

[0101] S21, Lowering the tool string 53: Control the cable trolley 51, and through the cable 51 roller device, lower the cable 51 to put the tool string into the oil pipe 52 in the well, and observe the signal display in real time during the lowering process.

[0102] S22, Depth Calibration: (e.g.) Figure 6 As shown, before lowering the tool string to the predetermined depth, slow down in advance and lower it slowly until the predetermined depth of 3500 meters is reached; verify the lowering depth of cable 51 with the actual depth, accurately calibrate the position data, and press the blocker 54 to the top of the working cylinder 55.

[0103] S23. Shocking operation: Since the deployment of the plug 54 requires the shocker to keep hitting downwards, the downhole electric bidirectional shocking device 1 is controlled to knock the plug 54 into the designated position in the working cylinder 55, and then the knocking continues to cut the pin and complete the release action.

[0104] S24, Seating Shock: such as Figure 9 As shown, on the ground computer control software, parameters need to be set in advance: select downward impact mode, select 10 impacts, select level 1 impact intensity, select 30 for the lower limit of the stroke scale, select 0 for the upper limit of the stroke scale, click the start button, and observe the voltage and current curves in real time. When the downhole electric bidirectional impact device 1 receives the command, it will automatically perform the corresponding impact operation according to the command information, thereby knocking the blocker 54 into the working cylinder 55. Figure 7 As shown.

[0105] S25, Throwing Shock: such as Figure 4 and Figure 9 As shown, on the ground computer's operating software, parameters are set, the downward shock mode is selected, the number of shocks is set to 10, the shock intensity is set to level 2, the lower limit of the stroke is set to 40, and the upper limit of the stroke is set to 0. The start button is clicked, and the voltage and current curves are observed in real time. Upon receiving the command, the downhole electric bidirectional shock device 1 automatically performs the corresponding shock operation. This shock cuts the pin connecting the plug 54 to the plug 54 in the tubing 52, and the cable 51 is pulled up. Figure 8 As shown.

[0106] S3. Using cable 51, lift cable 51 to bring the downhole electric bidirectional shock device 1 out of the wellhead and retrieve other auxiliary tools, as detailed below:

[0107] The cable 51 is lifted onto the cable 51 vehicle, and the downhole electric bidirectional shock device 1 is brought out from the wellhead. The downhole electric bidirectional shock device 1 is retrieved, and the surface cable 51, pulleys, blowout preventer for cable 51, and other surface facilities are recovered.

[0108] The downhole electric bidirectional shock device 1 of this invention is simple and reliable to operate: the construction operation can be completed by clicking the command on the ground computer control software, without any other complicated mechanical operations, and the operation is simple and the labor intensity is low.

[0109] The downhole electric bidirectional shock device 1 of this invention has a good shock effect: it uses electrical energy as the source of shock energy, so the shock force directly depends on the amount of electrical energy, thus the force is controllable. The shock force acts directly on the shock rod 40, resulting in direct force application and high efficiency.

[0110] The downhole electric bidirectional shock device 1 of this invention has multiple shock modes: it can achieve single or multiple downward shocks, single or multiple upward shocks, and bidirectional continuous shocks. The shock stroke can also be set in advance in the program.

[0111] 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A downhole electrically powered bidirectional shock device, characterized in that, It includes a cable head sealing chamber (2), a weighted bar chamber (3), an intermediate joint (4), a pressure balance chamber (5), a power chamber (6), and a vibration transmission chamber (7) connected in sequence; The cable head sealing chamber (2) is also equipped with a circuit control component (8). The power chamber (6) includes a motor chamber (35), a linear motor (36), and a coupling (37). The vibration transmission chamber (7) is equipped with a vibration rod (40). The circuit control component (8) is electrically connected to the linear motor (36). One end of the motor chamber (35) is fixedly connected to the pressure balance chamber (5), and the other end of the motor chamber (35) is fixedly connected to the vibration transmission chamber (7). The linear motor (36) is installed in the motor chamber (35), and the linear motor (36) is connected to the vibration rod (40) through the coupling (37).

2. The downhole electrically powered bidirectional shock device according to claim 1, characterized in that, The cable head sealing chamber (2) includes a lifting ring (9), an upper connector (10), a cable sealing connector (12), and a connector locking ring (13); The lifting ring (9) is fixedly connected to the top of the upper connector (10). The upper connector (10) has a receiving cavity (14) inside. The cable sealing connector (12) and the connector locking ring (13) are disposed in the receiving cavity (14). The outer side of the connector locking ring (13) is threadedly connected to the inner wall of the upper connector (10). The connector locking ring (13) presses the cable sealing connector (12) onto the top of the receiving cavity (14).

3. The downhole electric bidirectional shock device according to claim 2, characterized in that, The cable head sealing chamber (2) also includes a sealing ring (11), which is disposed between the inner wall of the cable sealing joint (12) and the upper joint (10).

4. The downhole electrically powered bidirectional shock device according to claim 2, characterized in that, The receiving cavity (14) is provided with a first stepped hole (15) at one end near the lifting ring (9). The first stepped hole (15) includes a first round hole and a second round hole. The first round hole is located near the lifting ring (9), and the diameter of the second round hole is larger than the diameter of the first round hole. The connection between the first round hole and the second round hole has a first axial limiting surface (16). The cable sealing joint (12) has a stepped portion (17) at one end near the lifting ring (9). The stepped portion (17) includes a first cylindrical portion and a second cylindrical portion. The outer diameter of the second cylindrical portion is larger than the outer diameter of the first cylindrical portion. The connection between the first cylindrical portion and the second cylindrical portion has a second axial limiting surface (18). The first cylindrical portion is in clearance fit with the first circular hole, and the second cylindrical portion is in clearance fit with the second circular hole. The second axial limiting surface (18) abuts against the first axial limiting surface (16). The end of the joint locking ring (13) near the lifting ring (9) abuts against the end of the cable sealing joint (12) away from the lifting ring (9).

5. The downhole electrically powered bidirectional shock device according to claim 4, characterized in that, The receiving cavity (14) is provided with a third axial limiting surface (20) that is flush with the end of the cable sealing joint (12) away from the lifting ring (9). The end of the joint locking ring (13) near the lifting ring (9) abuts against the third axial limiting surface (20) and the end of the cable sealing joint (12) away from the lifting ring (9).

6. The downhole electrically powered bidirectional shock device according to claim 2, characterized in that, The circuit control component (8) includes a circuit board (21) and a pin sealing connector (22), and the weighted bar cabin (3) includes a weighted bar outer sleeve (23); One end of the weighted rod sleeve (23) is threaded to the end of the upper connector (10) away from the lifting ring (9), and the other end of the weighted rod sleeve (23) is threaded to the intermediate connector (4). The pin sealing connector (22) is disposed inside the weighted rod sleeve (23) and located at the connection between the weighted rod sleeve (23) and the upper connector (10). The outer side of the pin sealing connector (22) is threaded to the inner wall of the weighted rod sleeve (23). The circuit board (21) is disposed in the receiving cavity (14) and located between the connector locking ring (13) and the pin sealing connector (22).

7. The downhole electrically powered bidirectional shock device according to claim 6, characterized in that, The inside of the weighted bar sleeve (23) is provided with a fourth axial limiting surface (25) near the upper connector (10). One side of the pin sealing connector (22) abuts against the circuit board (21), and the other side of the pin sealing connector (22) abuts against the fourth axial limiting surface (25).

8. The downhole electrically powered bidirectional shock device according to claim 6, characterized in that, The weighted bar compartment (3) also includes a counterweight ring (24), which is disposed inside the outer sleeve (23) of the weighted bar. The weighted bar compartment (3) is also provided with a fifth axial limiting surface (26). One side of the counterweight ring (24) abuts against the fifth axial limiting surface (26), and the other side of the counterweight ring (24) abuts against the intermediate joint (4).

9. The downhole electrically powered bidirectional shock device according to any one of claims 1-8, characterized in that, The pressure balance chamber (5) includes a breathing chamber outer jacket (27), an upper piston (28), a central tube (29), a first spring (30), a lower piston (31), and a second spring (32); One end of the breathing chamber outer sleeve (27) is threaded to the intermediate joint (4), and the other end of the breathing chamber outer sleeve (27) is fixedly connected to the power compartment (6). A limit ring (34) is provided inside the breathing chamber outer sleeve (27). The central tube (29) is located inside the breathing chamber outer sleeve (27). The central tube (29) is threaded to the inner side of the limit ring (34). The upper piston (28), the first spring (30), the lower piston (31), and the second spring (32) are sequentially movably sleeved on the outside of the central tube (29). The upper piston (28) is located close to the limit ring (34), and the second spring (32) is located between the power compartment (6) and the lower piston (31).

10. The downhole electrically powered bidirectional shock device according to claim 9, characterized in that, One end of the motor compartment (35) is threadedly connected to the breathing chamber outer cover (27).

11. The downhole electrically powered bidirectional shock device according to claim 1, characterized in that, The vibration transmission chamber (7) also includes a limiting joint (38), a connecting head (39), and a lower outer casing (41); One end of the limiting joint (38) is threaded to the motor compartment (35), and the other end of the limiting joint (38) is threaded to the lower outer sleeve (41). The lower outer sleeve (41) is fitted on the outside of the vibration rod (40). One end of the vibration rod (40) is connected to the coupling (37) through the connector (39), and the other end of the vibration rod (40) is located outside the lower outer sleeve (41).

12. The downhole electrically powered bidirectional shock device according to claim 11, characterized in that, The vibrating rod (40) is provided with a first limiting boss (43) near the connector (39), and the connector (39) is provided with a first limiting recess (44) at one end near the vibrating rod (40). One end of the vibrating rod (40) is inserted into the first limiting recess (44), and the end face of the connector (39) near the vibrating rod (40) abuts against the first limiting boss (43). The limiting joint (38) is sleeved on the outside of the connector (39). The connector (39) has a second limiting boss (45) on the outside of one end near the vibrating rod (40). The inner side of the limiting joint (38) has a second limiting recess (46) that matches the second limiting boss (45). The end face of the second limiting boss (45) near the coupling (37) abuts against the bottom surface of the second limiting recess (46).

13. The downhole electrically powered bidirectional shock device according to claim 1, characterized in that, The motor compartment (35) has a sixth axial limiting surface (47) located near the pressure balance chamber (5). One side of the linear motor (36) abuts against the sixth axial limiting surface (47), and the coupling (37) is threadedly connected to the connector (39).

14. The downhole electrically powered bidirectional shock device according to claim 12, characterized in that, The lower outer sleeve (41) is provided with a second stepped hole (48), which includes a third circular hole and a fourth circular hole. The third circular hole is located near the limiting joint (38), and the diameter of the third circular hole is larger than the diameter of the fourth circular hole. The connection between the third circular hole and the fourth circular hole has a seventh axial limiting surface (49). The end of the shock rod (40) away from the connector (39) passes through the fourth circular hole, and the first limiting boss (43) is located in the third circular hole.

15. The downhole electrically powered bidirectional shock device according to claim 14, characterized in that, The vibration transmission chamber (7) also includes a third spring (42), which is sleeved on the shock rod (40). One end of the third spring (42) contacts the side of the first limiting boss (43) away from the connector (39), and the other end of the third spring (42) contacts the seventh axial limiting surface (49).

16. The downhole electrically powered bidirectional shock device according to claim 8, characterized in that, The counterweight ring (24) has a first through hole at its center.

17. The downhole electrically powered bidirectional shock device according to claim 9, characterized in that, The breathing chamber outer cover (27) is provided with multiple second through holes (33).

18. The downhole electrically powered bidirectional shock device according to claim 14, characterized in that, The wall of the lower outer sleeve (41) is provided with a plurality of third through holes (50) along the circumferential direction at the position of the third circular hole. Each third through hole (50) is arranged radially along the wall of the lower outer sleeve (41) and communicates with the third circular hole.

19. The downhole electrically powered bidirectional shock device according to any one of claims 1-8, characterized in that, The weighted bar compartment (3) is provided in one or more ways, and the multiple weighted bar compartments (3) are connected in series by threaded connection.

20. A method for electrically controlled shock-based retrieval, characterized in that, Based on the downhole electric bidirectional shock device according to any one of claims 1-19, the following steps are included: Connect the cable (51) of the cable (51) vehicle to the downhole electric bidirectional shock device, and fix the tool to be deployed on the vibration transmission chamber (7) to form a tool string; The tool string is lowered into the well via the cable (51) below the cable (51) vehicle. When the tool string reaches the set depth, the tool to be deployed is vibrated by controlling the electric bidirectional vibration device in the well to install the tool to be deployed in the designated position. The downhole electric bidirectional shock device is brought out of the wellhead by lifting the cable (51) on the cable (51) vehicle.

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