Manifold automatic pipe cable connecting device for underwater production system and connecting method

Abstract

The invention discloses an automatic manifold and cable connecting device for an underwater production system and a connecting method. The device comprises a bottom moving platform, and the bottom moving platform is provided with an underwater pipe cable connecting device through a supporting and fixing device; the underwater pipe cable connecting device comprises a connector shell, a pipeline center clamping groove is formed in the middle of the interior of the connector shell, and a sealing mechanism, a driving mechanism, a locking mechanism and an anchoring mechanism are symmetrically and sequentially installed on the two sides of the pipeline center clamping groove. The sealing mechanism comprises a main sealing ring connected with the pipeline center clamping groove, and the main sealing ring is connected with an auxiliary sealing ring through an O-shaped ring spacer ring. The driving mechanism comprises a sealing driving ring and an anchoring driving ring, one end of the sealing driving ring is connected with the auxiliary sealing ring, and the other end of the sealing driving ring is connected with the anchoring driving ring. The risk bearing capacity and the load bearing capacity are enhanced, the long-term and reliable sealing condition is ensured, and the operation procedure and the automation level are simplified and improved.

Description

Technical Field

[0001] The invention belongs to the field of LNG transportation and reception, and in particular relates to a manifold automatic connecting pipe and cable device and a connecting method for an underwater production system. Background Art

[0002] At present, the transportation of marine oil, natural gas and other energy sources mainly adopts two forms of transportation, one is marine cable transportation, and the other is pressure vessel transportation. In offshore oil pipelines, it has the advantages of safety, reliability, strong operability and high price ratio. Therefore, its scope of use is very wide. Since the 1980s, my country has started the construction of submarine oil pipelines, and has achieved expansion in the continuous development. More than 90% of China's oil and gas pipelines are steel cables, and their corrosion problems have brought severe challenges to the economic losses, emergencies and environmental pollution of pipelines. Therefore, the use of renewable pipes is an important direction for the development of marine oil and gas pipelines in the future. In order to overcome the defects and shortcomings of metal pipes, in-depth research and application have been carried out on them. Due to the use of non-alloyed flexible pipe performance devices, the corrosion rate of pipelines has been greatly improved, which in a sense extends the life of pipelines and cables and obtains better economic benefits. At the same time, many non-metallic materials have low thermal conductivity and high surface roughness, which can greatly reduce energy consumption during oil transportation and improve oil transportation capacity. According to the production technology and the selected materials, non-metallic composite pipes can be divided into two categories: one is thermoplastic composite pipes, the other is thermosetting composite pipes, and the other is thermoplastic composite pipes.

[0003] Deep-sea exploration places increasingly higher demands on equipment, and submarine hoses and flexible cables are currently the most commonly used submarine cables. During deep-sea mining, submarine cables are affected by factors such as wind, waves and currents, which puts higher demands on their axial bearing capacity. The connection between cables and devices, and its connection capacity is an important indicator. In addition, due to the frequent changes in offshore loads, conventional weld connection methods can no longer meet the needs of use. At present, its end connections are glued: its fatigue resistance and tensile resistance can well meet the requirements of actual projects. The submarine cable connection technology is not yet perfect, and the existing cable connection equipment has a very cumbersome construction process, and must be equipped with special loading and unloading machines, and the equipment used is complex.

[0004] Since the 1950s, foreign countries have developed submarine cable connection devices. In the early 1980s, as the technology matured, major international offshore engineering companies had developed various underwater cable joints and related auxiliary devices according to different connection conditions. The submarine cable connection devices can be divided into several types according to their structural types: clamp type, compression type, locking pin flange type connector, and claw type connector.

[0005] my country started late in the field of underwater pipe and cable connection devices, and the research is relatively lagging behind. At present, it is still at the level of basic theory and experiment, and there is still a long way to go for comprehensive research and development and application. my country has achieved remarkable scientific research results in the automatic connection of marine pipe and cable and underwater production system manifolds, but there is still a big gap with the international advanced level. The working principle of the clamp-type automatic connector is to squeeze the inclined surface of the ring with the flange together, and fasten the ring to the flange through the ROV, so as to form a pre-tightening between the flanges, thereby achieving a sealing effect. At present, this connector has been prototyped and sea trials have been carried out. In my country, there has not been much relevant research on this situation, and conventional flange screws are used. In foreign countries, there are many relatively mature connectors that can withstand large external loads and have high sealing performance. Therefore, the problems of leakage of submarine pipes and cables and rapid repair of joints have become issues that need to be solved urgently. Summary of the invention

[0006] The object of the present invention is to provide an ROV-based automatic connection pipe and cable device and a connection method, the operation procedure is simplified and the automation level is improved.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A device for automatically connecting pipes and cables to a manifold in an underwater production system, comprising: a bottom mobile platform, on which an underwater pipe and cable connecting device is installed via a supporting and fixing device;

[0009] The underwater pipe and cable connection device comprises a connector housing, wherein a pipeline center slot is provided in the middle of the connector housing, and a sealing mechanism, a driving mechanism, a locking mechanism, and an anchoring mechanism are symmetrically installed on both sides of the pipeline center slot in sequence;

[0010] The sealing mechanism comprises a main sealing ring connected to the central groove of the pipeline, and the main sealing ring is connected to the auxiliary sealing ring through an O-ring spacer;

[0011] The driving mechanism comprises a sealing driving ring and an anchoring driving ring, one end of the sealing driving ring is connected to the secondary sealing ring, and the other end of the sealing driving ring is connected to the anchoring driving ring;

[0012] The locking mechanism includes a spring pin, which is fixed in the guide groove of the sealing drive ring. The anchoring drive ring has a pin hole. The spring pin follows the guide groove to the position of the pin hole. The spring pin falls into the pin hole so that the device is locked.

[0013] The anchoring mechanism comprises an anchor transmission ring and an end cover. One side of the anchor transmission ring is connected to the sealing drive ring, and the other side of the anchor transmission ring is connected to the end cover.

[0014] Furthermore, the bottom mobile platform includes a base, two driving wheel structures are installed at the two diagonal parts of the lower part of the base, and universal wheels and motors are respectively installed at the other two diagonal parts of the lower part of the base, the motor is connected to a synchronous pulley 1 located on the upper part of the base, and the two driving wheel structures are respectively connected to a synchronous pulley 2 and a synchronous pulley 3 on the upper part of the base, and a tensioning wheel is also installed on the upper part of the base, and the synchronous pulley 1, the synchronous pulley 2, the synchronous pulley 3 and the tensioning wheel are connected by a synchronous belt.

[0015] Furthermore, the driving wheel structure includes a shock-absorbing spring rubber column, the upper end of the shock-absorbing spring rubber column is connected to the synchronous pulley two or the synchronous pulley three, the lower end of the shock-absorbing spring rubber column is connected to the support plate, a stepper motor is installed on the support plate, the stepper motor is connected to the embedded wheel, and the embedded wheel is connected to the side plate.

[0016] Furthermore, the inner surface of the end cover has slip teeth, and the slip teeth form teeth on the surface of the pipeline and fit with the inner cylindrical surface of the anchor transmission ring.

[0017] Furthermore, the driving mechanism forms an oil chamber through the sealing driving ring, the anchoring driving ring and the connector housing, and the oil chamber is connected to the oil filling hole. By injecting hydraulic oil into the oil chamber, thrust is generated and load transfer is achieved.

[0018] Furthermore, the oil filling hole injects hydraulic oil into the oil cavity through an ROV manual hydraulic flying head.

[0019] A method for connecting a manifold automatically connected to a pipe-cable device for an underwater production system using the above method comprises the following steps:

[0020] Before connection, the underwater pipe and cable connection device is moved to the designated position by a mobile platform, the connected pipe and the underwater pipe and cable connection device are placed, and the interface of the pipe is placed at the pre-set center position of the connector, and high-pressure oil is injected into the oil filling hole on the connector housing by ROV, so that the hydraulic oil flows into the oil cavity between the sealing drive ring and the anchoring drive ring of the transmission device. Under the action of hydraulic force, the sealing drive ring and the anchoring drive ring move to both sides along the axial direction;

[0021] In the sealing device, the sealing drive ring squeezes the main sealing ring and the auxiliary sealing ring, thereby generating a sealing transmission load. At the same time, the anchor transmission ring pushes toward the end cover, so that the inner cone of the anchor transmission ring contacts the outer cone of the end cover. Under the influence of the cone, the slip tooth body in the end cover moves radially, pressing the slip tooth body. When the anchor transmission ring moves to the maximum value, the inner cylindrical surface of the anchor transmission ring is in a tangent relationship with the outer cylindrical surface of the slip, so that the anchor transmission ring will not fall off.

[0022] After the spring pin moves to a specified position in the guide groove, the spring pin falls into the pin hole through the guide groove, thereby locking the part;

[0023] Finally, inject hydraulic oil of a specific pressure into the oil filling hole, wait for 10 minutes, and after judging that the filling process is successful, the entire connection process is completed.

[0024] The beneficial effects of the present invention are:

[0025] The sealing structure of the present invention adds an O-ring spacer between the main sealing ring and the auxiliary sealing ring, which can not only fit the sealing surface to prevent the medium from being contaminated and affecting the sealing effect, but also has good sealing and protective performance, and can also prevent the "shoulder protrusion" phenomenon of the seal.

[0026] The driving mechanism of the present invention adopts a hydraulic driving mode, which not only saves the tedious operation of driving dozens of screws with nuts, but also saves the trouble of moving heavy-load equipment. The device is driven by internal hydraulic oil, and the operating procedures and automation level are simplified and improved.

[0027] The locking mechanism of the present invention uses a locking device of a spring pin and a sealing ring. Compared with other locking mechanisms, the spring pin can provide a more compact and firm structure, with higher safety and reliability. In addition, the design of the spring pin can also support quick installation and easier maintenance. This design allows the sealing ring to be replaced or removed faster and more conveniently. Using a spring pin for locking can improve the sealing performance of the sealing ring. Due to the influence of the pin, the pressure of the rubber seal is still maintained within a certain range, thereby ensuring long-term and reliable sealing conditions.

[0028] The present invention adopts a special three-wheel structure in the bottom mobile platform. Two rollers and a universal wheel are used at the bottom of the bottom mobile platform. Three motors drive the same pulley to drive the roller to move. Through the synergy of several components, the movement of the underwater platform is realized. Among them, the pulley and roller are the main components of the platform movement, and the control motor controls the sliding and steering. In addition, the direction of the platform is controlled by the universal wheel, so as to achieve more precise movement and control.

[0029] The present invention adopts an embedded driving roller in the design of the driving wheel structure, and adopts a shock-absorbing spring rubber column design, which provides the device with good anti-seismic performance. The bottom mobile platform is relatively low in height. In order to be subjected to less resistance during movement, the sufficient driving force and braking force generated by the roller and the ground enable the connecting device to smoothly reach the working place, achieving effective driving and braking effects. The center of gravity of the platform is low, and the platform is more stable when moving underwater, reducing the possibility of the platform floating or tilting due to unstable center of gravity, thereby improving the stability of the platform, and its ability to withstand risks and loads is enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Attached Figure 1 It is a structural schematic diagram of the present invention.

[0031] Attached Figure 2 It is a structural schematic diagram of the underwater pipe and cable connecting device of the present invention.

[0032] Attached Figure 3 It is a three-dimensional schematic diagram of the underwater pipe and cable connecting device of the present invention.

[0033] Attached Figure 4 It is a structural schematic diagram of the sealing structure of the present invention.

[0034] Attached Figure 5 It is a structural schematic diagram of the anchoring structure of the present invention.

[0035] Attached Figure 6 It is a schematic diagram of the structure of the slip tooth body on the inner surface of the end cover of the present invention.

[0036] Attached Figure 7 It is a structural schematic diagram of the driving structure of the present invention.

[0037] Attached Figure 8 It is a structural schematic diagram of the driving wheel structure of the present invention.

[0038] Attached Fig. 9 It is the front view of the present invention.

[0039] In the attached drawings: 1. Support and fixing device; 2. Synchronous pulley; 3. Motor; 4. Synchronous pulley; 5. Tensioning pulley; 6. Synchronous pulley; 7. Mobile platform; 8. Underwater pipe and cable connection device; 9. Main sealing ring; 10. O-ring spacer; 11. Secondary sealing ring; 12. Anchor transmission ring; 13. End cover; 14. Sealing drive ring; 15. Spring pin; 16. Guide groove; 17. Anchor drive ring; 18. Embedded wheel; 19. Side plate; 20. Shock-absorbing spring rubber column; 21. Synchronous belt; 22. Base; 23. Support plate; 24. Stepper motor; 25. Pin hole; 26. Oil chamber; 27. Oil filling hole; 28. Rubber sleeve; 29. ​​Pipe center slot. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with the accompanying drawings.

[0041] The present invention provides a device for automatically connecting pipes and cables to a manifold in an underwater production system. Figure 1 , 9 As shown, it includes: a bottom moving platform 7 and an underwater pipe and cable connecting device 8.

[0042] The bottom mobile platform 7 is installed with an underwater pipe and cable connecting device 8 through the supporting fixing device 1 to achieve the purpose of connecting, sealing and locking the underwater flexible pipe and cable.

[0043] As attached Figure 2-3 As shown, the underwater pipe and cable connection device 8 includes a connector housing, and a pipe center slot 29 is provided in the middle of the connector housing. A sealing mechanism, a driving mechanism, a locking mechanism, and an anchoring mechanism are symmetrically installed on both sides of the pipe center slot 29.

[0044] As attached Figure 4 As shown, the sealing mechanism includes a main sealing ring 9 connected to the central groove 29 of the pipeline, and the main sealing ring 9 is connected to the auxiliary sealing ring 11 through an O-ring spacer 10; the sealing mechanism adopts sealing ring sealing, and the main sealing device includes a double-layer sealing ring and an O-ring spacer between the pipe and cable. The pipe and cable connection device adopts a double-layer sealing ring for sealing. When the device is compressed, the air between the two sealing rings is squeezed out, and at the same time, an O-ring spacer is added between the two sealing rings, which can not only fit the sealing surface to prevent contamination of the medium and affect the sealing effect, but also has good sealing performance and protection performance, and can also prevent the "shoulder protrusion" phenomenon of the seal. The sealing mechanism can prevent the leakage of oil and gas.

[0045] As attached Figure 5-6 As shown, the anchoring mechanism includes an anchor transmission ring 12 and an end cover 13 . One side of the anchor transmission ring 12 is connected to a sealing drive ring 14 , and the other side of the anchor transmission ring 12 is connected to the end cover 13 .

[0046] The anchoring mechanism selects the most widely used, simple in structure and highly reliable ferrule-type embedded anchoring device. The anchoring effect is mainly formed by the slips on the surface of the end cover forming teeth on the surface of the pipe, which fits with the small inner cylindrical surface of the anchor transmission ring 12, thereby having a large friction force to achieve the locking of the device; when anchoring, the force transmission ring is affected by the driving device and moves toward the end cover, and the small inner cylindrical surface of the anchor transmission ring 12 contacts the outer cylindrical surface of the slips to prevent the outer cylindrical surface of the slips from coming out under the action of load, thereby effectively preventing the force transmission ring from sliding, thereby achieving anchoring loading.

[0047] A rubber sleeve 28 may be optionally installed between the anchor transmission ring 12 and the end cover 13 to ensure a fixed connection between the two.

[0048] As attached Figure 7 As shown, the driving mechanism includes a sealing driving ring 14 and an anchoring driving ring 17 . One end of the sealing driving ring is connected to the secondary sealing ring 11 , and the other end of the sealing driving ring 14 is connected to the anchoring driving ring 17 .

[0049] The driving mechanism forms an oil chamber 26 through the sealing driving ring 14, the anchoring driving ring 17 and the connector housing, and the oil chamber is connected to the oil injection hole 27. The hydraulic oil is injected into the oil chamber 26 to generate thrust and realize load transfer. The oil injection hole 27 injects hydraulic oil into the oil chamber 26 through the ROV manual hydraulic flying head.

[0050] The locking mechanism includes a spring pin 15, which is fixed in the guide groove 16 of the sealing drive ring 14. The anchoring drive ring has a pin hole 25. The spring pin follows the guide groove to reach the position of the pin hole 25, and the spring pin falls into the pin hole 25 to complete the locking of the device. The locking mechanism is used to keep the mechanism in a sealed and anchored state to prevent the mechanism from rebounding.

[0051] As attached Figure 8 As shown, the bottom mobile platform 7 includes a base 22, two driving wheel structures are installed at the two diagonal parts of the lower part of the base 22, and universal wheels and motors 3 are installed at the other two diagonal parts of the lower part of the base 22 respectively. The motor 3 is connected to a synchronous pulley 1 4 located on the upper part of the base 22, and the two driving wheel structures are connected to a synchronous pulley 2 2 and a synchronous pulley 3 6 on the upper part of the base 22 respectively. A tensioning wheel 5 is also installed on the upper part of the base 22, and the synchronous pulley 1 4, the synchronous pulley 2 2, the synchronous pulley 3 6, and the tensioning wheel 5 are connected by a synchronous belt 21.

[0052] The steering mechanism uses a synchronous pulley as the main drive device, and the wheel system composed of rollers and universal wheels can flexibly adjust the direction and speed of the underwater platform to improve its controllability during underwater operations.

[0053] The driving wheel structure includes a shock-absorbing spring rubber column 20, the upper end of the shock-absorbing spring rubber column 20 is connected to the synchronous pulley 2 or the synchronous pulley 3 6, and the lower end of the shock-absorbing spring rubber column 20 is connected to the support plate 23. A stepper motor 24 is installed on the support plate 23, and the stepper motor 24 is connected to the embedded wheel 18, and the embedded wheel 18 is connected to the side plate 19.

[0054] The synchronous belt 21 can be driven by a synchronous rubber belt. The motor provides power to control the rotation of three synchronous pulleys.

[0055] The driving wheel structure is used to cooperate with the operation of the submarine cable connection device. It can realize the autonomous movement and precise positioning of the connection device, so as to more conveniently maintain and repair the submarine cable system. The direction of the entire wheel can be adjusted by driving the synchronous pulleys 2, 4, and 6 through the synchronous belt 21, and then the stepper motor 24 controls the movement of the embedded wheel 18. The shock-absorbing spring rubber column 20 can ensure the overall stability of the entire structure when moving.

[0056] The present invention provides a method for connecting a manifold automatically connected to a pipe-cable device for an underwater production system, the method comprising the following steps:

[0057] Before connection, the underwater pipe and cable connection device 8 is moved to the designated position by the mobile platform 7, the connected pipe and the underwater pipe and cable connection device 8 are placed, and the interface of the pipe is placed at the pre-set center position of the connector, and high-pressure oil is injected into the oil filling hole 27 on the connector housing by the ROV, so that the hydraulic oil flows into the oil chamber 26 between the sealing drive ring 14 and the anchoring drive ring 17 of the transmission device. Under the action of hydraulic force, the sealing drive ring 14 and the anchoring drive ring 12 move to both sides along the axial direction;

[0058] In the sealing device, the sealing drive ring 14 squeezes the main sealing ring 9 and the auxiliary sealing ring 11, thereby generating a sealing transmission load. At the same time, the anchor transmission ring 12 pushes toward the end cover 13, so that the inner cone of the anchor transmission ring 12 contacts the outer cone of the end cover 13. Under the influence of the cone, the slip tooth body in the end cover 13 moves radially, pressing the slip tooth body. When the anchor transmission ring 12 moves to the maximum value, the inner cylindrical surface of the anchor transmission ring 12 is in a tangent relationship with the outer cylindrical surface of the slip, so that the anchor transmission ring 12 will not fall off;

[0059] After the spring pin 15 moves to a specified position in the guide groove 16, the spring pin 15 passes through the guide groove 16 and falls into the pin hole 25, thereby locking the part;

[0060] Finally, inject hydraulic oil of a specific pressure into the oil filling hole 27, wait for 10 minutes, and after judging that the filling process is successful, the entire connection process is completed.

[0061] The whole operation procedure of the present invention is simplified and the automation level is improved.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for automatically connecting pipes and cables to a manifold in an underwater production system, characterized in that: include: A bottom mobile platform (7), wherein the bottom mobile platform (7) is provided with an underwater pipe and cable connection device (8) via a supporting and fixing device (1); The underwater pipe and cable connection device (8) comprises a connector housing, wherein a pipeline center slot (29) is provided in the middle of the connector housing, and a sealing mechanism, a driving mechanism, a locking mechanism, and an anchoring mechanism are symmetrically installed on both sides of the pipeline center slot (29) in sequence; The sealing mechanism comprises a main sealing ring (9) connected to the central groove (29) of the pipeline, and the main sealing ring (9) is connected to the auxiliary sealing ring (11) through an O-ring spacer (10); The driving mechanism comprises a sealing driving ring (14) and an anchoring driving ring (17); one end of the sealing driving ring is connected to the secondary sealing ring (11), and the other end of the sealing driving ring (14) is connected to the anchoring driving ring (17); The locking mechanism comprises a spring pin (15), the spring pin (15) is fixed in a guide groove (16) of a sealing drive ring (14), the anchor drive ring is provided with a pin hole (25), the spring pin follows the guide groove to reach the position of the pin hole (25), and the spring pin falls into the pin hole (25) so that the device is locked; The anchoring mechanism comprises an anchor transmission ring (12) and an end cover (13); one side of the anchor transmission ring (12) is connected to a sealing drive ring (14), and the other side of the anchor transmission ring (12) is connected to the end cover (13).

2. The automatic pipe and cable connection device for a manifold in an underwater production system according to claim 1, characterized in that: The bottom mobile platform (7) comprises a base (22), two driving wheel structures are installed at two diagonal positions at the bottom of the base (22), and universal wheels and motors (3) are installed at the other two diagonal positions at the bottom of the base (22), and the motors (3) are connected to a synchronous pulley 1 (4) located at the top of the base (22), and the two driving wheel structures are connected to a synchronous pulley 2 (2) and a synchronous pulley 3 (6) at the top of the base (22), respectively. A tensioning wheel (5) is also installed at the top of the base (22), and the synchronous pulley 1 (4), the synchronous pulley 2 (2), the synchronous pulley 3 (6) and the tensioning wheel (5) are connected by a synchronous belt (21).

3. The automatic pipe-cable connection device for a manifold in an underwater production system according to claim 1, characterized in that: The driving wheel structure comprises a shock-absorbing spring rubber column (20), the upper end of the shock-absorbing spring rubber column (20) is connected to the synchronous pulley 2 (2) or the synchronous pulley 3 (6), the lower end of the shock-absorbing spring rubber column (20) is connected to a support plate (23), a stepping motor (24) is mounted on the support plate (23), the stepping motor (24) is connected to the embedded wheel (18), and the embedded wheel (18) is connected to the side plate (19).

4. The automatic pipe-cable connection device for a manifold in an underwater production system according to claim 1, characterized in that: The inner surface of the end cover (13) is provided with a slip tooth body, and the slip tooth body forms a tooth shape on the surface of the pipeline and fits with the inner cylindrical surface of the anchor transmission ring (12).

5. The automatic pipe-cable connection device for a manifold in an underwater production system according to claim 1, characterized in that: The driving mechanism forms an oil chamber (26) through a sealing driving ring (14), an anchoring driving ring (17) and a connecting piece housing. The oil chamber is connected to an oil injection hole (27). By injecting hydraulic oil into the oil chamber (26), thrust is generated and load transfer is achieved.

6. The automatic pipe-cable connection device for a manifold in an underwater production system according to claim 5, characterized in that: The oil injection hole (27) injects hydraulic oil into the oil chamber (26) through the ROV manual hydraulic flying head.

7. A method for connecting a manifold automatically connected to a cable device for an underwater production system using the method according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: Before connection, the underwater pipe and cable connection device (8) is moved to a designated position by a mobile platform (7), the connected pipe and the underwater pipe and cable connection device (8) are placed, and the interface of the pipe is placed at a pre-set central position of the connector, and high-pressure oil is injected into the oil injection hole (27) on the connector housing by an ROV, so that the hydraulic oil flows into the oil chamber (26) between the sealing drive ring (14) and the anchor drive ring (17) of the transmission device, and under the action of hydraulic force, the sealing drive ring (14) and the anchor drive ring (12) move to both sides along the axial direction; In the sealing device, the sealing drive ring (14) squeezes the main sealing ring (9) and the auxiliary sealing ring (11), thereby generating a sealing transmission load. At the same time, the anchor transmission ring (12) pushes toward the end cover (13), so that the inner cone of the anchor transmission ring (12) contacts the outer cone of the end cover (13). Under the influence of the cone, the slip tooth body in the end cover (13) moves radially, pressing the slip tooth body. When the anchor transmission ring (12) moves to a maximum value, the inner cylindrical surface of the anchor transmission ring (12) and the outer cylindrical surface of the slip are in a tangent relationship, so that the anchor transmission ring (12) will not fall off. After the spring pin (15) moves to a specified position in the guide groove (16), the spring pin (15) passes through the guide groove (16) and falls into the pin hole (25), thereby achieving locking of the position; Finally, inject hydraulic oil of a specific pressure into the oil filling hole (27), wait for 10 minutes, and after judging that the filling process is successful, the entire connection process is completed.

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