External underwater oil supplementing system of built-in oil source of submarine pipeline recovery tool

Abstract

The invention relates to an oil recharging system, in particular to an external underwater oil recharging system of a built-in oil source of a submarine pipeline recovery tool, which comprises a main insertion tool part and a configuration arm part, and the configuration arm part is arranged above the main insertion tool part and is used for connecting the main insertion tool part and the external oil source; the main insertion tool part comprises a main insertion tool body, an operation control module body, an end flange and a main insertion tool rod, the end flange is fixedly arranged at the right end of the operation control module body, and the right end of the main insertion tool body is fixedly sleeved with the operation control module body and the end flange; the main insertion tool rod is arranged at the right end of the end flange; according to the submarine pipeline recovery tool, the detachable configuration arm part is arranged on the main insertion tool part, and oil is supplied to the main insertion tool part through the configuration arm part, so that the submarine pipeline recovery tool can effectively supplement oil during underwater operation, the operation frequency of the submarine pipeline recovery tool is increased, and the efficiency and reliability of underwater construction are improved.

Description

Technical Field

[0001] The present invention relates to an oil replenishment system, and particularly to an external underwater oil replenishment system with an internal oil source for a subsea pipeline recovery tool. Background Art

[0002] When a subsea pipeline buckles or is damaged under external force, it needs to be recovered. Pipeline recovery tools are increasingly used worldwide due to their safety, efficiency, and convenience. The pipeline recovery tool adopts an internally expanding steel ball self-locking structure. The device is provided with a mandrel with circumferentially evenly distributed inclined cone grooves, and an outer sleeve steel ball fixing cage is arranged outside it. The cage is processed with circumferentially evenly distributed fixing holes, and the steel balls are restricted in the fixing holes of the cage. Driving the cage can make the steel balls move upward along the inclined cone grooves on the mandrel and expand outward from the mandrel, providing sufficient recovery tension by squeezing the inner wall of the subsea pipeline.

[0003] The control system of the subsea pipeline recovery tool is divided into internal control and external control modes. Among them, an internal control mode with a subsea pipeline recovery tool with an internal energy storage oil source, a Chinese patent with application number CN201911205812.9, a control system and control method for a subsea pipeline recovery tool. Since the internal hydraulic energy storage system of this subsea pipeline recovery tool is in the form of accumulator energy storage, the energy stored in the accumulator is limited and can only meet the system's one to two operations, and cannot meet the oil supply requirements for more operation times during the underwater operation of the recovery tool.

[0004] Therefore, it is necessary to add an external underwater oil replenishment system with an internal oil source for the subsea pipeline recovery tool to perform underwater oil replenishment work on the internal oil source of the subsea pipeline recovery tool through the oil source of the underwater operation robot ROV. Summary of the Invention

[0005] The main purpose of the present invention is to provide an external underwater oil replenishment system with an internal oil source for a subsea pipeline recovery tool to solve the problems raised in the related art.

[0006] To achieve the above object, according to one aspect of the present invention, there is provided an external underwater oil replenishment system with an internal oil source for a subsea pipeline recovery tool, including a main insertion tool part, and further including a configuration arm part. The configuration arm part is arranged above the main insertion tool part and is used to connect the main insertion tool part and an external oil source.

[0007] Further, the main insertion tool part includes a main insertion tool body, an operation control module body, an end flange, and a main insertion tool rod. The end flange is fixedly arranged at the right end of the operation control module body. Both the operation control module body and the end flange are fixedly sleeved on the right end of the main insertion tool body. The main insertion tool rod is arranged at the right end of the end flange and is fixedly connected to the main insertion tool body.

[0008] Further, a one-way valve, a lateral oil supply channel, an oil replenishment receiving port, and a vertical oil supply channel are provided at the top of the operation control module body. The oil replenishment receiving port is provided at the top of the operation control module body. The vertical oil supply channel is vertically provided at the bottom of the oil replenishment receiving port. The lateral oil supply channel is horizontally provided in the operation control module body and is communicated with the vertical oil supply channel. The one-way valve is fixedly provided in the lateral oil supply channel.

[0009] Further, a positioning conical hole is provided at the top of the end flange, and the positioning conical hole is on the same straight line as the oil replenishment receiving port.

[0010] Further, a plurality of lateral sealing rings are provided on the inner side wall of the oil replenishment receiving port, a plurality of bottom sealing rings are fixedly provided at the bottom of the oil replenishment receiving port, an adjusting mechanism is provided on the outer ring of the oil replenishment receiving port, the adjusting mechanism is located in the operation control module body, and the adjusting mechanism includes a power part, a plurality of sliding parts, and a plurality of pushing and pulling parts.

[0011] Further, the power part includes an L-shaped pipe, a power rod, a first spring, and a power piston. The L-shaped pipe is located at the bottom of the oil replenishment receiving port. The power piston is slidably provided in the vertical pipe of the L-shaped pipe. The bottom end of the power rod is fixedly connected to the power piston, and the top end extends into the bottom of the oil replenishment receiving port. The power rod is slidably connected to the operation control module body and the L-shaped pipe. The first spring is located in the vertical pipe of the L-shaped pipe and is above the power piston. The top end of the first spring is fixedly connected to the top of the L-shaped pipe, and the bottom end is fixedly connected to the power piston.

[0012] Further, the sliding part includes a rectangular groove, a vertical pipe, and a sliding group. The sliding group includes a triangular block, a sliding rod, and a sliding piston. The vertical pipe is above the horizontal pipe of the L-shaped pipe and is communicated with the L-shaped pipe. The rectangular groove is above the vertical pipe. The triangular block is slidably provided in the rectangular groove. The sliding piston is slidably provided in the vertical pipe. The top end of the sliding rod is fixedly connected to the bottom end of the triangular block, and the bottom end is fixedly connected to the sliding piston. The sliding rod is slidably connected to the vertical pipe and the operation control module body.

[0013] Further, the pushing and pulling part includes a columnar groove, a retaining ring, and a push rod group. The push rod group includes a push rod, a second spring, and a ball. The columnar groove is horizontally provided in the operation control module body and is communicated with the rectangular groove and the annular groove at both ends respectively. The push rod is located in the columnar groove. One end of the push rod is fixedly connected to the lateral sealing ring, and the other end is provided with a ball in a rolling manner. The retaining ring is fixedly provided on the outer ring of the push rod and is slidably connected to the columnar groove. The second spring is provided on the outer ring of the left end of the push rod. One end of the second spring is fixedly connected to the operation control module body, and the other end is fixedly connected to the retaining ring.

[0014] Further, the configuration arm includes a hoisting arm group, an oil filling group, and a clamp group. The hoisting arm group includes a HOTSTAB male head, a hoisting arm, and a HOTSTAB female head. The oil filling group includes a connecting pipeline, an oil filling interface joint, a joint compression flange, and a positioning taper pin. The clamp group includes a clamp rotating pin shaft, a left clamp, a locking screw, a right clamp, and a screw lock nut.

[0015] Further, the HOTSTAB female head is fixedly arranged on the hoisting arm, the HOTSTAB male head is inserted into the HOTSTAB female head, the oil filling interface joint is fixedly arranged on the lower side of the hoisting arm through the joint compression flange, the connecting pipeline is arranged inside the hoisting arm, one end of the connecting pipeline is connected to the HOTSTAB female head, the other end is connected to the oil filling interface joint, the positioning taper pin is fixedly arranged on the lower side of the hoisting arm, the left clamp and the right clamp are respectively rotatably arranged on the lower side of one end of the hoisting arm through the clamp rotating pin shaft, the locking screw sequentially penetrates through the left clamp and the right clamp, and the screw lock nut is rotatably arranged at the end of the locking screw.

[0016] Compared with the prior art, the present invention has the following beneficial effects: By providing a detachable configuration arm on the main insertion tool part, and supplying oil to the main insertion tool part through the configuration arm, the underwater pipeline recovery tool can be effectively refueled during underwater operation, increasing the number of operation times of the underwater pipeline recovery tool and improving the efficiency and reliability of underwater construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the overall layout diagram of the underwater pipeline recovery tool of the present invention;

[0018] Figure 2 It is the axonometric view of the overall layout of the underwater pipeline recovery tool of the present invention;

[0019] Figure 3 It is the layout diagram of the main insertion tool of the underwater pipeline recovery tool of the present invention;

[0020] Figure 4 It is the overall layout diagram of the configuration arm of the oil filling system of the underwater pipeline recovery tool of the present invention;

[0021] Figure 5 It is the partial sectional view of the configuration arm of the oil filling system of the underwater pipeline recovery tool of the present invention;

[0022] Figure 6 It is the layout diagram of the operation control module of the oil filling system of the underwater pipeline recovery tool of the present invention;

[0023] Figure 7 It is the partial sectional view of the operation control module of the oil filling system of the underwater pipeline recovery tool of the present invention;

[0024] Figure 8Partial sectional view and partial enlarged view of the oil replenishment system operation control module of the subsea pipeline recovery tool of the present invention;

[0025] Figure 9 Cross-sectional view of the oil replenishment receiving oil port of the present invention;

[0026] Figure 10 Partial enlargement of the oil replenishment receiving oil port of the present invention Figure 1 ;

[0027] Figure 11 Partial enlargement of the oil replenishment receiving oil port of the present invention Figure 2 。

[0028] Reference numerals:

[0029] 1. Configuration arm; 11. HOTSTAB male head; 12. Lifting arm; 13. HOTSTAB female head; 14. Connecting pipeline; 15. Clamp rotating pin shaft; 16. Left clamp; 17. Locking screw; 18. Right clamp; 19. Screw lock nut; 110. Oil replenishment interface joint; 111. Joint pressing flange; 112. Positioning taper pin;

[0030] 2. Main insertion tool part; 20. Bottom sealing ring; 21. Operation control module body; 22. End flange; 23. Check valve; 24. Horizontal oil supply channel; 25. Oil replenishment receiving oil port; 26. Vertical oil supply channel; 27. Positioning taper hole; 28. Main insertion tool rod; 29. Lateral sealing ring;

[0031] 3. Power part; 31. L-shaped pipeline; 32. Power rod; 33. First spring; 34. Power piston;

[0032] 4. Sliding part; 41. Rectangular groove; 42. Triangular block; 43. Sliding rod; 44. Sliding piston; 45. Vertical pipe;

[0033] 5. Pushing and pulling part; 51. Push-pull rod; 52. Retaining ring; 53. Second spring; 54. Cylindrical groove; 55. Ball; Detailed implementation manners

[0034] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present invention as follows.

[0035] This embodiment provides an external underwater oil replenishment system with an internal oil source for a subsea pipeline recovery tool, as Figure 1 and 2 shown, which includes a main insertion tool part 2, and also includes a configuration arm part 1. The configuration arm part 1 is arranged above the main insertion tool part 2 and is used to connect the main insertion tool part 2 and an external oil source.

[0036] As shown Figure 3 in FIG. 1, the main insertion tool part 2 includes a main insertion tool body, an operation control module body 21, an end flange 22 and a main insertion tool rod 28. The end flange 22 is fixedly arranged at the right end of the operation control module body 21. Both the operation control module body 21 and the end flange 22 are fixedly sleeved on the right end of the main insertion tool body. The main insertion tool rod 28 is arranged at the right end of the end flange 22 and is fixedly connected to the main insertion tool body.

[0037] As shown Figure 7 in FIG. 2, a check valve 23, a lateral oil supply passage 24, an oil replenishment receiving port 25 and a vertical oil supply passage 26 are arranged on the top of the operation control module body 21. The oil replenishment receiving port 25 is arranged on the top of the operation control module body 21. The vertical oil supply passage 26 is arranged vertically at the bottom of the oil replenishment receiving port 25. The lateral oil supply passage 24 is arranged horizontally in the operation control module body 21 and is communicated with the vertical oil supply passage 26. The check valve 23 is fixedly arranged in the lateral oil supply passage 24. The oil replenishment interface joint 110 is inserted into the oil replenishment receiving port 25 to replenish oil into the oil replenishment receiving port 25. The check valve 23 is opened, and the replenishment oil liquid enters the lateral oil supply passage 24 from the vertical oil supply passage 26 through the check valve 23, and then is added to the main insertion tool body from the lateral oil supply passage 24 to supply oil to the main insertion tool body, increasing the number of operation times of the recovery tool during underwater operation.

[0038] As shown Figure 7 in FIG. 3, a positioning taper hole 27 is arranged on the top of the end flange 22. The positioning taper hole 27 and the oil replenishment receiving port 25 are on the same straight line. The positioning taper hole 27 is in the shape of an inverted truncated cone with a large top and a small bottom, which is the same as the shape of the positioning taper pin 112, facilitating the insertion of the positioning taper pin 112 to position the configuration arm part 1 and the main insertion tool part 2, and the inverted truncated cone-shaped positioning taper hole 27 facilitates the extraction of the positioning taper pin 112 to avoid jamming.

[0039] As shown Figures 9 - 11 in FIG. 4, a plurality of lateral sealing rings 29 are arranged on the inner side wall of the oil replenishment receiving port 25. A plurality of bottom sealing rings 20 are fixedly arranged at the bottom of the oil replenishment receiving port 25. An adjusting mechanism is arranged outside the oil replenishment receiving port 25. The adjusting mechanism is located in the operation control module body 21. The adjusting mechanism includes a power part 3, a plurality of sliding parts 4 and a plurality of pushing and pulling parts 5. A plurality of annular grooves for accommodating the lateral sealing rings 29 are arranged on the inner side wall of the oil replenishment receiving port 25.

[0040] As shown Figure 10As shown in the figure, the power unit 3 includes an L-shaped pipe 31, a power rod 32, a first spring 33 and a power piston 34. The L-shaped pipe 31 is located at the bottom of the oil replenishment receiving port 25. The power piston 34 is slidably arranged in the vertical pipe of the L-shaped pipe 31. The bottom end of the power rod 32 is fixedly connected to the power piston 34, and the top end extends into the bottom of the oil replenishment receiving port 25. The power rod 32 is slidably connected to both the operation control module body 21 and the L-shaped pipe 31. The first spring 33 is located in the vertical pipe of the L-shaped pipe 31 and above the power piston 34. The top end of the first spring 33 is fixedly connected to the top of the L-shaped pipe 31, and the bottom end is fixedly connected to the power piston 34. The L-shaped pipe 31 is filled with air. Both the power piston 34 and the sliding piston 44 are hermetically connected to the L-shaped pipe 31. When there is no external force, the first spring 33 supports the power piston 34, so that the power rod 32 extends into the bottom of the oil replenishment receiving port 25. When the oil replenishment interface joint 110 is inserted into the oil replenishment receiving port 25 and presses down the power rod 32, the power rod 32 pushes the power piston 34 to move downward, the first spring 33 elongates, and the air pressure in the L-shaped pipe 31 increases.

[0041] As Figure 10 shown in the figure, the sliding part 4 includes a rectangular groove 41, a vertical pipe 45 and a sliding group. The sliding group includes a triangular block 42, a sliding rod 43 and a sliding piston 44. The vertical pipe 45 is located above the horizontal pipe of the L-shaped pipe 31 and is communicated with the L-shaped pipe 31. The rectangular groove 41 is located above the vertical pipe 45. The triangular block 42 is slidably arranged in the rectangular groove 41. The sliding piston 44 is slidably arranged in the vertical pipe 45. The top end of the sliding rod 43 is fixedly connected to the bottom end of the triangular block 42, and the bottom end is fixedly connected to the sliding piston 44. The sliding rod 43 is slidably connected to both the vertical pipe 45 and the operation control module body 21. The inclined surface of the triangular block 42 faces the pushing and pulling part 5. When the triangular block 42 moves upward, the inclined surface presses the ball 55 to push the push rod 51 to move towards the side sealing ring 29, the second spring 53 elongates, the pulling force of the push rod 51 on the side sealing ring 29 decreases, and the side sealing ring 29 contracts inward under the action of its resilience force and is inserted into the corresponding sealing groove on the outer ring of the oil replenishment interface joint 110. When the triangular block 42 moves downward, the inclined surface no longer presses the ball 55, the second spring 53 rebounds, pulls the push rod 51 to retract through the retaining ring 52, the push rod 51 pulls the side sealing ring 29 outward, the side sealing ring 29 expands outward and retracts into the annular groove inside the oil replenishment receiving port 25, leaving the sealing groove on the outer ring of the oil replenishment interface joint 110, which is convenient for pulling out the oil replenishment interface joint 110. Both the side sealing ring 29 and the bottom sealing ring 20 are made of highly elastic rubber and are easy to deform and can return to their original shape after deformation.

[0042] As Figure 11As shown, the push-pull part 5 includes a columnar groove 54, a retaining ring 52, and a push-pull rod group. The push-pull rod group includes a push-pull rod 51, a second spring 53, and a ball 55. The columnar groove 54 is transversely arranged in the operation control module body 21, and both ends are respectively communicated with the rectangular groove 41 and the annular groove. The push-pull rod 51 is located in the columnar groove 54. One end of the push-pull rod 51 is fixedly connected to the lateral sealing ring 29, and the other end is provided with a ball 55 in a rolling manner. The retaining ring 52 is fixedly arranged on the outer circle of the push-pull rod 51 and is slidably connected with the columnar groove 54. The second spring 53 is arranged on the outer circle of the left end of the push-pull rod 51. One end of the second spring 53 is fixedly connected to the operation control module body 21, and the other end is fixedly connected to the retaining ring 52. When the triangular block 42 moves up and down, the ball 55 freely rolls on the inclined surface of the triangular block 42, facilitating the movement of the triangular block 42.

[0043] As Figure 4 , 5 shown, the configuration arm part 1 includes a hoisting arm group, an oil filling group, and a clamp group. The hoisting arm group includes a HOTSTAB male head 11, a hoisting arm 12, and a HOTSTAB female head 13. The oil filling group includes a connecting pipeline 14, an oil filling interface joint 110, a joint pressing flange 111, and a positioning taper pin 112. The clamp group includes a clamp rotating pin shaft 15, a left clamp 16, a locking screw 17, a right clamp 18, and a screw lock nut 19.

[0044] The HOTSTAB female head 13 is fixedly arranged on the hoisting arm 12. The HOTSTAB male head 11 is inserted into the HOTSTAB female head 13. The oil filling interface joint 110 is fixedly arranged on the lower side of the hoisting arm 12 through the joint pressing flange 111. The connecting pipeline 14 is arranged in the hoisting arm 12. One end of the connecting pipeline 14 is connected to the HOTSTAB female head 13, and the other end is connected to the oil filling interface joint 110. The positioning taper pin 112 is fixedly arranged on the lower side of the hoisting arm 12. The left clamp 16 and the right clamp 18 are respectively rotatably arranged on the lower side of one end of the hoisting arm 12 through the clamp rotating pin shaft 15. The locking screw 17 sequentially passes through the left clamp 16 and the right clamp 18. The screw lock nut 19 is rotatably arranged at the end of the locking screw 17. One end of the locking screw 17 is rotatably connected to the left clamp 16, and the other end passes through the right clamp 18. The screw lock nut 19 is sleeved on the locking screw 17 outside the right clamp 18 and is threadedly connected to the locking screw 17. By rotating the screw lock nut 19, the left clamp 16 and the right clamp 18 can be tightened or opened, so as to fix the configuration arm part 1 on the main insertion tool part 2 or remove it from the main insertion tool part 2.

[0045] As Figure 9 , 10As shown in FIGS. 10 and 11, insert the oil replenishing interface joint 110 into the oil replenishing receiving port 25. When the bottom of the oil replenishing interface joint 110 presses the power rod 32 to move downward, the power rod 32 pushes the power piston 34 to move downward, the first spring 33 is stretched, the gas in the L-shaped pipe 31 is compressed, and the pressure increases. Under the action of the air pressure difference, the gas in the L-shaped pipe 31 pushes the sliding piston 44 to move upward. The sliding piston 44 drives the triangular block 42 to move upward through the sliding rod 43. The triangular block 42 is inserted into the end of the push-pull rod 51. The triangular block 42 presses the push-pull rod 51 to retract into the columnar groove 54, and the second spring 53 is stretched. The side seal ring 29 is pushed out of the end flange 22 by the push-pull rod 51 and enters the corresponding seal groove on the outer ring of the oil replenishing interface joint 110 to block the seal groove, increasing the sealing performance between the oil replenishing interface joint 110 and the oil replenishing receiving port 25; when the oil replenishing interface joint 110 is pulled out of the oil replenishing receiving port 25, the first spring 33 contracts, pulling up the power piston 34 upward. The air pressure in the L-shaped pipe 31 becomes smaller. Under the action of the air pressure difference, the external air pushes the sliding piston 44 to move downward. The sliding piston 44 drives the triangular block 42 to move downward through the sliding rod 43. The triangular block 42 is withdrawn from the end of the push-pull rod 51, and the second spring 53 contracts. The side seal ring 29 is pulled back into the end flange 22 through the push-pull rod 51, leaving the seal groove on the outer ring of the oil replenishing interface joint 110, and the oil replenishing interface joint 110 is separated from the oil replenishing receiving port 25, facilitating the pulling out of the oil replenishing interface joint 110.

[0046] As Figure 4 and Figure 5 shown, the left clamp 16 and the right clamp 18 are respectively clamped on both sides of the main insertion tool rod 28. The rotating screw nut 19 is tightened through the operation of the underwater robot ROV to tighten the locking screw 17, so that the left clamp 16 and the right clamp 18 tightly hold the main insertion tool rod 28, and the configuration arm 1 is fixed on the main insertion tool part 2. After the subsea pipeline recovery tool is inserted into the recovery pipeline, the subsea pipeline recovery tool drives the steel balls to expand and tighten the recovery pipeline. The rotating screw nut 19 is operated through the underwater robot ROV to release the locking screw 17, and the left clamp 16 and the right clamp 18 are opened, and the configuration arm (1) is separated from the main insertion tool part 2.

[0047] As Figure 2 and Figure 4As shown, insert the HOTSTAB male head 11 into the HOTSTAB female head 13 to form an oil supply channel. This oil supply channel conducts the oil inlet of the HOTSTAB male head 11 to the oil outlet of the HOTSTAB female head 13. The oil outlet of the HOTSTAB female head 13 is connected to the oil replenishment interface joint 110 through the connecting pipeline 14. The end of the oil replenishment interface joint 110 is processed into a conical shape and is provided with a sealing groove, which is paired with the bottom sealing ring 20 and the lateral sealing ring 29 to form a conical sealing joint form. The conical interface is beneficial for the alignment of the interface and will not cause the joint to jam when the configuration arm 1 is separated from the main insertion tool. The oil inlet of the HOTSTAB male head 11 is connected to the oil supply outlet of the built-in oil source of the underwater robot ROV. After the HOTSTAB male head 11 is inserted into the HOTSTAB female head 13, the oil supply of the ROV built-in oil source will be introduced into the oil replenishment interface joint 110 through the formed oil circuit channel, so as to replenish oil for the subsea pipeline recovery tool.

[0048] Inside the operation control module body 21, there are functional elements that operate all the control requirements for the actions of the subsea pipeline recovery tool to control the subsea pipeline recovery tool.

[0049] The positioning conical hole 27 is paired with the positioning conical pin 112 installed in the middle of the configuration arm 1 for positioning when the oil replenishment interface joint 110 is aligned with the oil replenishment receiving oil port 25. At the same time, the configuration arm 1 is restricted on the main insertion tool part 2 to prevent the configuration arm 1 from rotating and moving around the main insertion tool part 2, protecting the oil replenishment interface joint 110; the conical structure of the positioning conical pin 112 and the positioning conical hole 27 facilitates the separation of the configuration arm 1 from the main insertion tool part 2.

[0050] As Figure 6 、 7 As shown in FIGS. 8, the outer shape of the end flange 22 is processed into a large chamfer structure, and the operating part of the operation control module body 21 is also processed into a chamfer shape, reducing the damage to the rollers of the construction ship's stinger during the subsea pipeline recovery construction process when the subsea pipeline recovery tool is dragged back to the engineering ship, and increasing the passability of the operation control module body 21 and the end flange 22 through the stinger rollers.

[0051] The above is only a preferred embodiment of the present invention, and it is not intended to limit the present invention in any form. Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the equivalent embodiments of equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An external underwater oil replenishment system with an internal oil source for a subsea pipeline recovery tool, including a main insertion tool part (2), characterized in that, It further includes a configuration arm (1) which is arranged above the main insertion tool part (2) and used for connecting the main insertion tool part (2) and an external oil source.

2. The external underwater oil replenishing system for the built-in oil source of the subsea pipeline recovery tool according to claim 1, characterized in that, The main insertion tool part (2) includes a main insertion tool body, an operation control module body (21), an end flange (22) and a main insertion tool rod (28). The end flange (22) is fixedly arranged at the right end of the operation control module body (21). Both the operation control module body (21) and the end flange (22) are fixedly sleeved on the right end of the main insertion tool body. The main insertion tool rod (28) is arranged at the right end of the end flange (22) and fixedly connected with the main insertion tool body.

3. The external underwater oil replenishment system for the built-in oil source of the subsea pipeline recovery tool according to claim 2, characterized in that, On the top of the operation control module body (21), there are arranged a one-way valve (23), a transverse oil supply channel (24), an oil replenishment receiving oil port (25) and a vertical oil supply channel (26). The oil replenishment receiving oil port (25) is arranged on the top of the operation control module body (21). The vertical oil supply channel (26) is arranged vertically at the bottom of the oil replenishment receiving oil port (25). The transverse oil supply channel (24) is arranged transversely in the operation control module body (21) and communicated with the vertical oil supply channel (26). The one-way valve (23) is fixedly arranged in the transverse oil supply channel (24).

4. The external underwater oil replenishment system for the built-in oil source of the subsea pipeline recovery tool according to claim 3, characterized in that, On the top of the end flange (22), there is arranged a positioning tapered hole (27) which is on the same straight line as the oil replenishment receiving oil port (25).

5. The external underwater oil replenishment system for the built-in oil source of the subsea pipeline recovery tool according to claim 3, characterized in that, On the inner side wall of the oil replenishment receiving oil port (25), there are arranged a plurality of lateral sealing rings (29). At the bottom of the oil replenishment receiving oil port (25), there are fixedly arranged a plurality of bottom sealing rings (20). An adjusting mechanism is arranged on the outer circle of the oil replenishment receiving oil port (25). The adjusting mechanism is located in the operation control module body (21) and includes a power part (3), a plurality of sliding parts (4) and a plurality of pushing and pulling parts (5).

6. The external underwater oil replenishment system for the built-in oil source of the subsea pipeline recovery tool according to claim 5, characterized in that The power part (3) includes an L-shaped pipe (31), a power rod (32), a first spring (33) and a power piston (34). The L-shaped pipe (31) is located at the bottom of the oil replenishment receiving oil port (25). The power piston (34) is slidably arranged in the vertical pipe of the L-shaped pipe (31). The bottom end of the power rod (32) is fixedly connected with the power piston (34), and the top end extends into the bottom of the oil replenishment receiving oil port (25). The power rod (32) is slidably connected with both the operation control module body (21) and the L-shaped pipe (31). The first spring (33) is located in the vertical pipe of the L-shaped pipe (31) and above the power piston (34). The top end of the first spring (33) is fixedly connected with the top of the L-shaped pipe (31), and the bottom end is fixedly connected with the power piston (34).

7. The external underwater oil replenishing system for the built-in oil source of the subsea pipeline recovery tool according to claim 6, characterized in that, The sliding part (4) includes a rectangular groove (41), a vertical pipe (45) and a sliding group. The sliding group includes a triangular block (42), a sliding rod (43) and a sliding piston (44). The vertical pipe (45) is located above the horizontal pipe of the L-shaped pipe (31) and is communicated with the L-shaped pipe (31). The rectangular groove (41) is located above the vertical pipe (45). The triangular block (42) is slidably arranged in the rectangular groove (41). The sliding piston (44) is slidably arranged in the vertical pipe (45). The top end of the sliding rod (43) is fixedly connected to the bottom end of the triangular block (42), and the bottom end is fixedly connected to the sliding piston (44). The sliding rod (43) is slidably connected to both the vertical pipe (45) and the operation control module body (21).

8. The external underwater oil replenishment system for the built-in oil source of the subsea pipeline recovery tool according to claim 7, characterized in that, The pushing and pulling part (5) includes a cylindrical groove (54), a retaining ring (52) and a push-pull rod group. The push-pull rod group includes a push-pull rod (51), a second spring (53) and a ball (55). The cylindrical groove (54) is arranged horizontally in the operation control module body (21) and is communicated with the rectangular groove (41) and the annular groove at both ends. The push-pull rod (51) is located in the cylindrical groove (54). One end of the push-pull rod (51) is fixedly connected to the lateral sealing ring (29), and the other end is provided with a ball (55) in a rolling manner. The retaining ring (52) is fixedly arranged on the outer circle of the push-pull rod (51) and is slidably connected to the cylindrical groove (54). The second spring (53) is arranged on the outer circle of the left end of the push-pull rod (51). One end of the second spring (53) is fixedly connected to the operation control module body (21), and the other end is fixedly connected to the retaining ring (52).

9. The external underwater oil replenishment system for the built-in oil source of the subsea pipeline recovery tool according to claim 1, characterized in that, The configuration arm part (1) includes a lifting arm group, an oil replenishing group and a clamp group. The lifting arm group includes a HOTSTAB male head (11), a lifting arm (12) and a HOTSTAB female head (13). The oil replenishing group includes a connecting pipeline (14), an oil replenishing interface joint (110), a joint pressing flange (111) and a positioning taper pin (112). The clamp group includes a clamp rotating pin shaft (15), a left clamp (16), a locking screw (17), a right clamp (18) and a screw lock nut (19).

10. The external underwater oil replenishment system for the built-in oil source of the subsea pipeline recovery tool according to claim 9, characterized in that, The HOTSTAB female head (13) is fixedly arranged on the lifting arm (12). The HOTSTAB male head (11) is inserted into the HOTSTAB female head (13). The oil replenishing interface joint (110) is fixedly arranged on the lower side of the lifting arm (12) through the joint pressing flange (111). The connecting pipeline (14) is arranged in the lifting arm (12). One end of the connecting pipeline (14) is connected to the HOTSTAB female head (13), and the other end is connected to the oil replenishing interface joint (110). The positioning taper pin (112) is fixedly arranged on the lower side of the lifting arm (12). The left clamp (16) and the right clamp (18) are respectively rotatably arranged on the lower side of one end of the lifting arm (12) through the clamp rotating pin shaft (15). The locking screw (17) sequentially penetrates through the left clamp (16) and the right clamp (18). The screw lock nut (19) is rotatably arranged at the end of the locking screw (17).

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