Electric drive release device for oil and water well logging operation and use method

Abstract

The present invention relates to the technical field of offshore oilfield oil and water well development, and in particular to an electric drive release device for oil and water well logging construction and a method of use. The technical scheme is: the upper shell and the lower shell are connected by an intermediate connector, a motor is installed in the inner cavity of the upper shell, the lower end of the motor is connected to the first transmission shaft and the second transmission shaft, the lower connector, the release connection block and the release connection shaft are installed in the lower shell, the lower end of the second transmission shaft is movably connected to the release connection shaft, and the lower side of the release connection shaft is connected to the lower connector by a thread. The beneficial effect is: the motor drives the first transmission shaft and the second transmission shaft to drive the release connection shaft to rotate, so that the release connection shaft moves downward, so that the release connection block can move inward, under the gravity of the lower connector and the release connection shaft, the release connection block is squeezed away from the groove, and the lower shell is separated from the lower connector, so as to achieve the purpose of electric drive release, and the structure is simple, the release is stable, and the release success rate is high.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore oilfield oil and water well development, and in particular to an electric drive release device for oil and water well logging construction and a use method thereof. Background Art

[0002] At present, in the process of oil and water well development in offshore oil fields, especially in the logging operation of oil and water wells, downhole logging tools may get stuck. When they cannot be unstuck, the downhole tools will be temporarily dropped in the well to preserve the logging cable or to take the next remedial measures. The existing dropping measure is to achieve the purpose of dropping by shearing pins. The advantages of this measure are: simple structure, and the dropping tool can be combined inside the tool wire rope cap; but its disadvantages are: there is a situation of dropping failure in the process of dropping by shearing pins, because the shear force is affected by the material of the pin on the one hand, and the well inclination on the other hand. If the wire rope cap is not provided with a shear pin, the only way is to increase the pulling force to pull the logging cable out of the wire rope cap, and then lower the salvage tool for subsequent salvage. However, in most cases, the logging cable is disconnected from the wire rope cap, and broken wires will remain at the top of the wire rope cap, resulting in the salvage tool being unable to grasp the salvage head at the top of the wire rope cap.

[0003] Therefore, it is necessary to design an electric drive release device for oil and water well logging operation and a method of using it. Summary of the invention

[0004] The purpose of the present invention is to address the above-mentioned defects in the prior art and to provide an electric-driven release device and a method of use for oil and water well logging operations. The release is driven by a motor, and the structure is simple, the release is stable, and the release success rate is high.

[0005] The present invention mentions an electric drive release device for oil and water well logging construction, and its technical solution is: including an upper shell, and also including a lower shell, a motor, a coupling, a first transmission shaft, a second transmission shaft, an intermediate connector, a lower connector, a release connection block, and a release connection shaft. The upper shell and the lower shell are connected by the intermediate connector, and the lower shell and the lower connector are connected by the release connection block to form a whole. The motor is installed in the inner cavity of the upper shell, and the lower end of the motor is connected to the first transmission shaft through a coupling. The second transmission shaft is installed in the inner cavity of the intermediate connector, and the upper end of the second transmission shaft is movably connected to the first transmission shaft; the lower shell is installed in the lower shell. A connecting body, a release connecting block and a release connecting shaft, wherein the release connecting shaft is arranged in the lower connecting body, a groove is arranged on the inner wall of the lower shell body, a connecting hole is arranged in the middle part of the outer wall of the lower connecting body, the release connecting block is installed at the groove and the connecting hole, the lower end of the second transmission shaft is movably connected with the release connecting shaft, the lower side of the outer wall of the release connecting shaft is connected with the lower side of the inner wall of the lower connecting body through a thread, the motor drives the first transmission shaft and the second transmission shaft to rotate, driving the release connecting shaft to move downward, so that the release connecting block is squeezed by the gravity of the lower connecting body to enter the connecting hole of the lower connecting body, thereby separating the lower shell body from the lower connecting body to realize release.

[0006] Preferably, the above-mentioned release connecting shaft includes a guide limit rod, a release connecting shaft body, and a lower connecting part of the release connecting shaft. The outer wall of the lower connecting part of the release connecting shaft is threadedly matched with the inner wall of the lower connecting body through an external thread. The upper part of the lower connecting part of the release connecting shaft is the release connecting shaft body. The upper part of the release connecting shaft body is provided with a guide limit rod, and the outer diameter of the release connecting shaft body is greater than the outer diameter of the guide limit rod.

[0007] Preferably, the difference in outer diameter between the above-mentioned release connecting shaft body and the guide limit rod is greater than the depth of the groove on the inner wall of the lower connecting body; a polygonal center hole is provided at the center of the release connecting shaft to cooperate with the polygonal shaft at the lower end of the second transmission shaft.

[0008] Preferably, the above-mentioned lower connecting body includes an upper joint, a main body, an outer shell, a connecting hole, a limit cavity, a protective plug cavity, and a guide limit cavity. The lower part of the main body is the outer shell, and the upper end of the main body is provided with an upper joint. The outer diameter of the outer shell is larger than the outer diameter of the main body. The outer wall of the main body is provided with more than one group of connecting holes for installing a hand-release connecting block. The interior of the main body is provided with a guide limit cavity; the lower part of the outer shell is provided with a limit cavity and a protective plug cavity.

[0009] Preferably, a protective cap for protecting the top thread of the upper shell is installed at the upper end of the above-mentioned upper shell, and the single-core cable socket is fixed in the through hole at the top of the upper shell by a retaining spring, the positive pole of the motor is connected to the pin at the bottom of the single-core cable socket through a wire, and the negative pole of the motor is connected to the negative pole screw through a wire to power the motor.

[0010] Preferably, the above-mentioned motor is installed in the motor housing by means of set screws, and the intermediate connecting body is fixedly connected to the upper housing and the lower housing by means of third pins respectively.

[0011] Preferably, a limit pin is installed on the upper side of the first transmission shaft, and a thrust bearing is installed on the lower side of the first transmission shaft to offset the thrust generated by the bottom hole pressure on the first transmission shaft.

[0012] Preferably, a sliding seal assembly consisting of a retaining ring, a retaining sleeve, a pressure cap and an O-ring is installed at the lower portion of the second transmission shaft, and more than one set of retaining rings and O-rings are installed in the annular cavity between the second transmission shaft and the inner wall of the intermediate connector, and a retaining sleeve is installed below the O-ring. A pressure cap is installed on the outside of the retaining sleeve, and the pressure cap is fixed to the lower end surface of the intermediate connector by screws; a first pin is installed on the second transmission shaft inside the pressure cap, and the retaining sleeve is used to limit the second transmission shaft from moving downward and disengaging from the first transmission shaft.

[0013] Preferably, inner guide surfaces are provided at the upper and lower ends of the groove of the inner wall of the above-mentioned lower shell body, the release connection block comprises a release connection block body, an outer guide surface, an arcuate surface, and a limiting protrusion, the upper and lower ends of the upper surface of the release connection block body are respectively provided with outer guide surfaces, the inner side of the release connection block is provided with an arcuate surface, and limiting protrusions are respectively provided on both sides of the lower end of the release connection block.

[0014] The method for using the electric drive release device for oil and water well logging operation mentioned in the present invention includes the following process:

[0015] The logging cable supplies power to the motor in the upper shell through the single-core cable socket. The output end of the motor drives the coupling and drives the first transmission shaft to rotate. The lower end of the first transmission shaft is connected to the second transmission shaft, driving the second transmission shaft to rotate in the intermediate connecting body, and sealing is achieved through a sliding seal assembly composed of a retaining ring, a retaining sleeve, a pressure cap and an O-ring. The second transmission shaft drives the hand-release connecting shaft to rotate. Since the second transmission shaft and the hand-release connecting shaft are threadedly connected, the hand-release connecting shaft rotates under the action of the thread and produces relative displacement with the second transmission shaft, causing the hand-release connecting shaft to move downward. Since the hand-release connecting shaft body of the hand-release connecting shaft moves downward, a cavity is generated on the inner side of the hand-release connecting block. Under the gravity of the lower connecting body and the hand-release connecting shaft, the hand-release connecting block is squeezed away from the groove, so that the hand-release connecting block is completely entered into the connecting hole, causing the lower shell to be separated from the lower connecting body, thereby achieving the purpose of electric drive hand-release.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention drives the first transmission shaft and the second transmission shaft to rotate the release connecting shaft through a motor, so that the release connecting shaft moves downward. Since the difference in outer diameter between the release connecting shaft body and the guide limit rod is greater than the depth of the groove on the inner wall of the lower connecting body, the release connecting block can move inward. Under the gravity of the lower connecting body and the release connecting shaft, the release connecting block is squeezed away from the groove, and the lower shell is separated from the lower connecting body, thereby achieving the purpose of electric drive release. The structure is simple, the release is stable, and the release success rate is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall installation structure of the present invention before the hand is released;

[0018] Figure 2 It is a schematic diagram of the overall structure of the present invention after the hand-release connection shaft is rotated downward;

[0019] Figure 3 This is a schematic diagram of the overall structure of the present invention after the hand is dropped;

[0020] Figure 4 It is a schematic diagram of the structure of the hand-drop connection shaft;

[0021] Figure 5 It is a schematic diagram of the structure of the hand-release connection axis in a top-down view;

[0022] Figure 6 is a schematic diagram of the appearance of the lower connector;

[0023] Figure 7 is a schematic diagram of the structure of the lower connector;

[0024] Figure 8 yes Figure 7 AA section diagram in;

[0025] Fig. 9 It is a three-dimensional structural diagram of the hand-throwing connection block;

[0026] Fig.10 It is a schematic diagram of the structure of the hand-drop connection block in a top-down view;

[0027] Fig.11 It is a structural schematic diagram of the side view of the hand-drop connection block;

[0028] In the above figure: protective cap 1, upper shell 2, motor shell 3, coupling 4, first transmission shaft 5, second transmission shaft 6, intermediate connector 7, retaining ring 8, retaining sleeve 9, pressing cap 10, lower shell 11, lower connector 12, hand release connection block 13, hand release connection shaft 14, protective plug 15, rubber ring 16, first pin 17, screw 18, O-type rubber ring 19, second rubber ring 20, second pin 21, thrust bearing 22, limit pin 23, nut 24, gasket 25, sealing ring 26, negative screw 27, retaining ring 28, single-core cable socket 29, motor 30, set screw 31, third pin 32;

[0029] Upper joint 12.1, main body 12.2, outer shell 12.3, connecting hole 12.4, limiting cavity 12.5, plug protection cavity 12.6, guide limiting cavity 12.7, release connecting block body 13.1, outer guide surface 13.2, arc surface 13.3, limiting protrusion 13.4, guide limiting rod 14.1, release connecting shaft main body 14.2, release connecting shaft lower connecting part 14.3, external thread 14.4, polygonal center hole 14.5. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0031] Example 1, reference Figure 1-Figure 11The electric drive release device for oil and water well logging construction mentioned in the present invention includes an upper shell 2, a lower shell 11, a motor 30, a coupling 4, a first transmission shaft 5, a second transmission shaft 6, an intermediate connector 7, a lower connector 12, a release connection block 13, and a release connection shaft 14. The upper shell 2 and the lower shell 11 are connected through the intermediate connector 7, and the lower shell 11 and the lower connector 12 are connected through the release connection block 13 to form a whole. The motor 30 is installed in the inner cavity of the upper shell 2, and the lower end of the motor 30 is connected to the first transmission shaft 5 through the coupling 4. The second transmission shaft 6 is installed in the inner cavity of the intermediate connector 7, and the upper end of the second transmission shaft 6 is movably connected to the first transmission shaft 5; the lower connector 12, the release connection block 13 and the release connection shaft 14 are installed in the lower shell 11. A release connecting shaft 14 is arranged in the lower connecting body 12, a groove is arranged on the inner wall of the lower shell body 11, a connecting hole 12.4 is arranged in the middle of the outer wall of the lower connecting body 12, a release connecting block 13 is installed at the groove and the connecting hole 12.4, the lower end of the second transmission shaft 6 is movably connected with the release connecting shaft 14, the lower side of the outer wall of the release connecting shaft 14 is connected with the lower side of the inner wall of the lower connecting body 12 by a thread, the motor 30 drives the first transmission shaft 5 and the second transmission shaft 6 to rotate, driving the release connecting shaft 14 to move downward, so that the release connecting block 13 is squeezed by the gravity of the lower connecting body 12 to enter the connecting hole of the lower connecting body 12, so that the lower shell body 11 is separated from the lower connecting body 12 to realize the release, and in addition, the upper part of the lower connecting body 12 is a standard salvage head, which is convenient for salvaging the well tool at a later time.

[0032] Reference Figure 4 and Figure 5 The release connecting shaft 14 mentioned in the present invention includes a guide limit rod 14.1, a release connecting shaft body 14.2, and a lower connecting part 14.3 of the release connecting shaft. The outer wall of the lower connecting part 14.3 of the release connecting shaft is threadedly matched with the inner wall of the lower connecting body 12 through an external thread 14.4. The upper part of the lower connecting part 14.3 of the release connecting shaft is the release connecting shaft body 14.2. The upper part of the release connecting shaft body 14.2 is provided with a guide limit rod 14.1. The outer diameter of the release connecting shaft body 14.2 is greater than the outer diameter of the guide limit rod 14.1.

[0033] Among them, the difference in outer diameter between the above-mentioned release connecting shaft body 14.2 and the guide limit rod 14.1 is greater than the depth of the groove on the inner wall of the lower connecting body 12; the center of the release connecting shaft 14 is provided with a polygonal center hole 14.5, which cooperates with the polygonal shaft at the lower end of the second transmission shaft 6.

[0034] Reference Figure 6-Figure 8The lower connector 12 mentioned in the present invention includes an upper joint 12.1, a body 12.2, an outer shell 12.3, a connecting hole 12.4, a limiting cavity 12.5, a plug cavity 12.6, and a guiding limiting cavity 12.7. The lower part of the body 12.2 is the outer shell 12.3. The upper joint 12.1 is provided at the upper end of the body 12.2. The outer diameter of the outer shell 12.3 is greater than the outer diameter of the body 12.2. The outer wall of the body 12.2 is provided with more than one group of connecting holes 12.4 for installing the hand-release connecting block 13. The interior of the body 12.2 is provided with a guiding limiting cavity 12.7; the lower part of the outer shell 12.3 is provided with a limiting cavity 12.5 and a plug cavity 12.6. The plug 15 is connected to the plug cavity 12.6 by threads to protect the internal thread of the lower end of the outer shell 12.3, and a rubber ring 16 is installed on the plug 15 to achieve a better sealing effect.

[0035] In addition, a protective cap 1 for protecting the top thread of the upper shell 2 is threadedly installed at the upper end of the upper shell 2, and a sealing ring 26 is installed to achieve a better sealing effect. The single-core cable socket 29 is fixed in the through hole at the top of the upper shell 2 by a retaining ring 28. The positive pole of the motor 30 is connected to the pin at the bottom of the single-core cable socket 29 through a wire, and the negative pole of the motor 30 is connected to the negative pole screw 27 through a wire for powering the motor 30, wherein a gasket 25 is installed on the negative pole screw 27, and a nut 24 is provided outside the gasket 25.

[0036] The above-mentioned motor 30 is installed in the motor housing 3 by means of a set screw 31. The lower end of the motor housing 3 is connected to the upper end of the intermediate connector 7 by means of a second pin 21. The intermediate connector 7 is fixedly connected to the upper housing 2 and the lower housing 11 by means of a third pin 32 respectively. A second rubber ring 20 is installed between the intermediate connector 7 and the lower housing 11 to achieve a better sealing effect.

[0037] A limit pin 23 is installed on the upper side of the first transmission shaft 5, and a thrust bearing 22 is installed on the lower side of the first transmission shaft 5 to offset the thrust generated by the bottom hole pressure on the first transmission shaft 5;

[0038] A sliding seal assembly consisting of a retaining ring 8, a retaining sleeve 9, a pressure cap 10 and an O-ring 19 is installed at the lower part of the above-mentioned second transmission shaft 6. More than one set of retaining rings 8 and O-rings 19 are installed in the annular cavity between the second transmission shaft 6 and the inner wall of the intermediate connector 7. The retaining sleeve 9 is installed below the O-ring 19. The pressure cap 10 is installed on the outside of the retaining sleeve 9, and the pressure cap 10 is fixed to the lower end surface of the intermediate connector 7 by a screw 18; a first pin 17 is installed on the second transmission shaft 6 in the pressure cap 10, and the retaining sleeve 9 is used to limit the second transmission shaft 6 from moving downward and disengaging from the first transmission shaft 5.

[0039] Reference Figure 9-11The upper and lower ends of the groove of the inner wall of the lower shell 11 mentioned in the present invention are provided with inner guide surfaces. The release connection block 13 includes a release connection block body 13.1, an outer guide surface 13.2, an arc surface 13.3, and a limiting protrusion 13.4. The upper and lower ends of the upper surface of the release connection block body 13.1 are respectively provided with outer guide surfaces 13.2, the inner side of the release connection block 13 is provided with an arc surface 13.3, and both sides of the lower end of the release connection block 13 are respectively provided with limiting protrusions 13.4.

[0040] The method for using the electric drive release device for oil and water well logging operation mentioned in the present invention includes the following process:

[0041] The logging cable supplies power to the motor 30 in the upper shell 2 through the single-core cable socket 29. The output end of the motor 30 drives the coupling 4 and drives the first transmission shaft 5 to rotate. The lower end of the first transmission shaft 5 is connected to the second transmission shaft 6, which drives the second transmission shaft 6 to rotate in the intermediate connector 7. The sealing is achieved by the sliding seal assembly composed of the retaining ring 8, the retaining sleeve 9, the pressure cap 10 and the O-ring 19. The second transmission shaft 6 drives the hand-release connecting shaft 14 to rotate. Since the second transmission shaft 6 and the hand-release connecting shaft 14 are threadedly connected, the hand-release connecting shaft 14 is connected to the second transmission shaft 6. The shaft 14 rotates under the action of the thread to produce relative displacement with the second transmission shaft 6, so that the release connecting shaft 14 moves downward. Since the release connecting shaft body 14.2 of the release connecting shaft 14 moves downward, a cavity is generated on the inner side of the release connecting block 13. Under the action of the gravity of the lower connecting body 12 and the release connecting shaft 14, the release connecting block 13 is squeezed away from the groove, so that the release connecting block 13 completely enters the connecting hole 12.4, so that the lower shell 11 is separated from the lower connecting body 12, and the purpose of electric drive release is achieved.

[0042] The above are only some preferred embodiments of the present invention. Any person skilled in the art may modify the above technical solutions or modify them into equivalent technical solutions. Therefore, the corresponding simple modifications or equivalent transformations made according to the technical solutions of the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. An electric drive release device for oil and water well logging operation, comprising an upper housing (2), characterized in that: The invention also comprises a lower shell (11), a motor (30), a coupling (4), a first transmission shaft (5), a second transmission shaft (6), an intermediate connecting body (7), a lower connecting body (12), a release connection block (13), and a release connection shaft (14); the upper shell (2) and the lower shell (11) are connected via the intermediate connecting body (7); the lower shell (11) and the lower connecting body (12) are connected via the release connection block (13) to form a whole; the motor (30) is installed in the inner cavity of the upper shell (2); the lower end of the motor (30) is connected to the first transmission shaft (5) via the coupling (4); the second transmission shaft (6) is installed in the inner cavity of the intermediate connecting body (7); the upper end of the second transmission shaft (6) is movably connected to the first transmission shaft (5); the lower connecting body (12), the release connection block (13), and the release connection shaft (14) are installed in the lower shell (11) 14), a release connection shaft (14) is arranged in the lower connecting body (12), a groove is arranged on the inner wall of the lower shell (11), a connection hole (12.4) is arranged in the middle of the outer wall of the lower connecting body (12), a release connection block (13) is arranged at the groove and the connection hole (12.4), the lower end of the second transmission shaft (6) is movably connected to the release connection shaft (14), the lower side of the outer wall of the release connection shaft (14) is connected to the lower side of the inner wall of the lower connecting body (12) by a thread, the motor (30) drives the first transmission shaft (5) and the second transmission shaft (6) to rotate, driving the release connection shaft (14) to move downward, so that the release connection block (13) is squeezed by the gravity of the lower connecting body (12) to enter the connection hole of the lower connecting body (12), thereby separating the lower shell (11) from the lower connecting body (12) to achieve release.

2. The electric drive release device for oil and water well logging operation according to claim 1 is characterized by: The release connecting shaft (14) comprises a guide limit rod (14.1), a release connecting shaft body (14.2), and a release connecting shaft lower connecting portion (14.3); the outer wall of the release connecting shaft lower connecting portion (14.3) is threadedly matched with the inner wall of the lower connecting body (12) via an external thread (14.4); the upper portion of the release connecting shaft lower connecting portion (14.3) is the release connecting shaft body (14.2); the upper portion of the release connecting shaft body (14.2) is provided with a guide limit rod (14.1); and the outer diameter of the release connecting shaft body (14.2) is greater than the outer diameter of the guide limit rod (14.1).

3. The electric drive release device for oil and water well logging operation according to claim 2 is characterized by: The difference in outer diameter between the release connecting shaft body (14.2) and the guide limit rod (14.1) is greater than the depth of the groove on the inner wall of the lower connecting body (12); a polygonal center hole (14.5) is provided at the center of the release connecting shaft (14) to cooperate with the polygonal shaft at the lower end of the second transmission shaft (6).

4. The electric drive release device for oil and water well logging operation according to claim 3 is characterized by: The lower connecting body (12) comprises an upper joint (12.1), a main body (12.2), an outer shell (12.3), a connecting hole (12.4), a limiting cavity (12.5), a plug protection cavity (12.6), and a guiding limiting cavity (12.7); the lower part of the main body (12.2) is the outer shell (12.3); the upper end of the main body (12.2) is provided with an upper joint (12.1); the outer diameter of the outer shell (12.3) is greater than the outer diameter of the main body (12.2); the outer wall of the main body (12.2) is provided with more than one group of connecting holes (12.4) for installing a hand-release connecting block (13); the interior of the main body (12.2) is provided with a guiding limiting cavity (12.7); the lower part of the outer shell (12.3) is provided with a limiting cavity (12.5) and a plug protection cavity (12.6).

5. The electric drive release device for oil and water well logging operation according to claim 4 is characterized by: A protective cap (1) for protecting the top thread of the upper shell (2) is installed at the upper end of the upper shell (2), and a single-core cable socket (29) is fixed in a through hole at the top of the upper shell (2) by a retaining spring (28). The positive pole of the motor (30) is connected to the pin at the bottom of the single-core cable socket (29) by a wire, and the negative pole of the motor (30) is connected to the negative pole screw (27) by a wire, so as to supply power to the motor (30).

6. The electric drive release device for oil and water well logging operation according to claim 5 is characterized by: The motor (30) is installed in the motor housing (3) via set screws (31), and the intermediate connector (7) is fixedly connected to the upper housing (2) and the lower housing (11) via third pins (32).

7. The electric drive release device for oil and water well logging operation according to claim 6 is characterized by: A limit pin (23) is installed on the upper side of the first transmission shaft (5), and a thrust bearing (22) is installed on the lower side of the first transmission shaft (5) to offset the thrust generated by the bottom hole pressure on the first transmission shaft (5).

8. The electric drive release device for oil and water well logging operation according to claim 7 is characterized by: A sliding seal assembly consisting of a retaining ring (8), a retaining sleeve (9), a pressing cap (10) and an O-ring (19) is installed at the lower part of the second transmission shaft (6); one or more retaining rings (8) and O-rings (19) are installed in the annular cavity between the second transmission shaft (6) and the inner wall of the intermediate connecting body (7); a retaining sleeve (9) is installed below the O-ring (19); a pressing cap (10) is installed outside the retaining sleeve (9), and the pressing cap (10) is fixed to the lower end surface of the intermediate connecting body (7) by means of a screw (18); a first pin (17) is installed on the second transmission shaft (6) inside the pressing cap (10); and the retaining sleeve (9) is used to limit the second transmission shaft (6) from moving downward and escaping from the first transmission shaft (5).

9. The electric drive release device for oil and water well logging operation according to claim 8 is characterized by: Inner guide surfaces are provided at the upper and lower ends of the groove of the inner wall of the lower shell (11); the release connection block (13) comprises a release connection block body (13.1), an outer guide surface (13.2), an arcuate surface (13.3), and a limiting protrusion (13.4); the upper and lower ends of the upper surface of the release connection block body (13.1) are respectively provided with outer guide surfaces (13.2); the inner side of the release connection block (13) is provided with an arcuate surface (13.3); and limiting protrusions (13.4) are respectively provided on both sides of the lower end of the release connection block (13).

10. The method for using the electric drive release device for oil and water well logging operation according to claim 9, characterized in that: The process includes the following: The logging cable supplies power to the motor (30) in the upper housing (2) through the single-core cable socket (29). The output end of the motor (30) drives the coupling (4) and drives the first transmission shaft (5) to rotate. The lower end of the first transmission shaft (5) is connected to the second transmission shaft (6), driving the second transmission shaft (6) to rotate in the intermediate connector (7). The sealing is achieved through a sliding seal assembly composed of a retaining ring (8), a retaining sleeve (9), a pressure cap (10) and an O-ring (19). The second transmission shaft (6) drives the hand-release connecting shaft (14) to rotate. Since the second transmission shaft (6) and the hand-release connecting shaft (14) are threadedly connected, The release connecting shaft (14) rotates under the action of the thread to generate relative displacement with the second transmission shaft (6), so that the release connecting shaft (14) moves downward. As the release connecting shaft body (14.2) of the release connecting shaft (14) moves downward, a cavity is generated inside the release connecting block (13). Under the action of the gravity of the lower connecting body (12) and the release connecting shaft (14), the release connecting block (13) is squeezed away from the groove, so that the release connecting block (13) completely enters the connecting hole (12.4), so that the lower shell (11) is separated from the lower connecting body (12), thereby achieving the purpose of electric drive release.

Images