System for lowering and recovering hydraulic pipe of underwater blowout preventer

Abstract

The invention discloses a system for lowering and recovering a hydraulic pipe of an underwater blowout preventer, which comprises a winch drum, a driving assembly and a bearing seat are respectively arranged on shafts at two ends of the winch drum, the driving assembly is used for driving the winch drum to rotate, and the bearing seat is used for supporting the winch drum; a replaceable chain wheel and a hydraulic slip ring are sequentially mounted on the projecting shaft on the other side of the bearing seat, and the replaceable chain wheel is connected with a cable arrangement device through a chain; a hydraulic pipe of the underwater blowout preventer is led into the winch roller through the hydraulic sliding ring, then led to the cable arrangement device through the winch roller and finally led to the underwater blowout preventer through the cable arrangement device, and the cable arrangement device is used for enabling the hydraulic pipe to be arranged in order along the winch roller. The driving assembly is connected with a pneumatic control system which is used for controlling the driving assembly to drive the winch drum. According to the system, hydraulic pipes with different diameters can be automatically collected and released, the heat dissipation effect is good in the collecting and releasing process, and serious heating of the hydraulic pipes cannot be caused.

Description

Technical Field

[0001] The invention belongs to the technical field of marine oil and gas production equipment and relates to a hydraulic pipe system for lowering and recovering an underwater blowout preventer. Background Art

[0002] As the most critical underwater well control equipment, deepwater drilling blowout preventers (BOPs) not only play a vital role in deepwater drilling and completion operations but, more importantly, are crucial for offshore drilling equipment, the marine environment, and personnel safety. Deepwater drilling BOPs incorporate multiple control technologies, integrating electrical, hydraulic, and pneumatic functions. These systems require numerous control points and a complex architecture, while also requiring high system reliability and flexible control. The hydraulic power unit on the platform deck delivers the BOP's working medium (hydraulic oil) to hydraulic pipes, which are connected to the subsea BOP's manifold. These hydraulic pipes flow along the riser to the BOP control valve, enabling efficient diversion of the working medium and ensuring the effective functioning of each BOP and actuator. During the reset phase, the working medium must be returned to the platform's hydraulic oil tank via separate hydraulic lines. BOP hydraulic hoses are usually retrieved / lowered by dedicated hydraulic hose winches. As underwater BOPs often operate in deep sea areas and are subject to the effects of waves, currents, and sea breezes, when lowering or retrieving the BOP hydraulic hoses, the BOP must first be able to function properly and avoid damage to the hoses due to dragging during the release and retraction process. Furthermore, the hoses should be kept from becoming entangled with the BOP body or marine debris in the water due to excessive cable release.

[0003] As underwater blowout preventers (BOPs) are deployed in increasingly deeper waters, the risk of damage to the BOP hydraulic hose during deployment and retraction increases. Traditionally, manual operation is used to lower and retrieve the BOP hydraulic hose, which is not only inefficient but also poses safety risks such as hose rupture due to untimely lowering.

[0004] Furthermore, the lack of a circulating cooling system during the extended lowering and recovery process of the underwater BOP hydraulic pipes can lead to severe heating. The high temperature of the BOP's working fluid can cause internal seals to age, fail, and leak, potentially leading to quality issues. Excessive working fluid temperature can also reduce the working fluid's viscosity, significantly increasing the time it takes to transmit signals to the drilling deck, leading to other issues.

[0005] In addition, there are many types of hydraulic pipes for underwater blowout preventers. Lowering or recovering hydraulic pipes of different diameters requires replacing different hydraulic pipe winches, which is inconvenient to install and disassemble, and also affects the efficiency of drilling operations. Summary of the Invention

[0006] The purpose of the present invention is to provide a hydraulic pipe system for lowering and recovering underwater blowout preventers, which can automatically retract and release hydraulic pipes of different diameters, and has good heat dissipation effect during the retraction and recovery process, and will not cause serious heating of the hydraulic pipes.

[0007] The technical solution adopted by the present invention is to lower and recover the hydraulic pipe system of the underwater blowout preventer, including a winch drum. A drive assembly and a bearing seat are respectively provided on the shafts at both ends of the winch drum. The drive assembly is used to drive the winch drum to rotate, and the bearing seat is used to support the winch drum; a replaceable sprocket and a hydraulic slip ring are successively installed on the protruding shaft on the other side of the bearing seat, and the replaceable sprocket is connected to a cable arranger through a chain; the hydraulic pipe of the underwater blowout preventer is introduced into the winch drum through the hydraulic slip ring, and then led out from the winch drum to the cable arranger, and finally led from the cable arranger to the underwater blowout preventer, and the cable arranger is used to arrange the hydraulic pipe in an orderly manner along the winch drum; the drive assembly is connected to the air control system, and the air control system is used to control the drive assembly to drive the winch drum.

[0008] The present invention is also characterized in that:

[0009] The system also includes a pneumatic brake, which is installed on the flange surface of the winch drum and is used to achieve emergency stop.

[0010] The system also includes a locking mechanism disposed on the legs of the winch drum.

[0011] The locking mechanism includes a pneumatic cylinder, the output shaft of the pneumatic cylinder is connected to a gap adjustment bolt, the other end of the gap adjustment bolt is connected to a wedge frame, the wedge frame is located as a whole in the shell, and the front end of the protruding shaft passes through the shell and is inserted into the locking hole of the winch drum; a number of return springs are connected to the wedge frame, and the two ends of the return springs are respectively connected to the shell and the wedge frame through pins; two sets of friction wheels are also installed on the shell, which are respectively located on both sides of the wedge frame and in contact with the wedge frame.

[0012] The cable arranger includes an arc-shaped cable winder, which includes a lead screw and a light bar; a left arc-shaped support plate and a right arc-shaped support plate are respectively provided at both ends of the arc-shaped cable winder, and the lead screw and the light bar in the arc-shaped cable winder still extend outward after passing through the left arc-shaped support plate, and the extended part is connected to an adjustment mechanism.

[0013] The adjusting mechanism is arc-shaped as a whole, and the curvature is consistent with the arc-shaped cable winder; the adjusting mechanism includes a handwheel, sprocket I and sprocket II which are connected in sequence and are coaxial, and a light rod sleeve and a lead screw sleeve are respectively provided on both sides of sprocket II, and sprocket II is located in the middle position of the light rod sleeve and the lead screw sleeve, and the light rod sleeve and the lead screw sleeve are respectively connected to the light rod and the lead screw of the arc-shaped cable winder; a sprocket III is installed on the lead screw sleeve, and sprocket III is connected to sprocket II through a chain; sprocket I is connected to a replaceable sprocket through a chain.

[0014] The hydraulic slip ring includes a rotor located in the center and a stator located on the outer ring, and the rotor and stator are separated by a wear-resistant block; an oil inlet channel and an air intake cooling channel are opened in the rotor, and an oil inlet interface and an air intake interface are opened in the stator, the oil inlet channel is connected to the oil inlet interface, and the air intake cooling channel is connected to the air intake interface.

[0015] The connection method of components in the gas control system is as follows:

[0016] The platform air source is connected to the air inlet interface of the pressure reducing valve II. A butterfly valve is introduced in the middle of this air path. The air outlet of the pressure reducing valve II is connected to the air inlet of the three-position five-way pneumatic reversing valve. The air outlet of the three-position five-way pneumatic reversing valve is connected to the air inlet of the quick exhaust valve. The muffler is connected to the exhaust port of the quick exhaust valve. The exhaust port of the quick exhaust valve is also connected to the air inlet of the pneumatic motor.

[0017] The platform air source is simultaneously connected to the control air path of the proportional reversing speed regulating handle. The exhaust port of the proportional reversing speed regulating handle is divided into three routes: cable release exhaust port, speed adjustment exhaust port, and cable retraction exhaust port.

[0018] The cable retraction exhaust port of the proportional reversing speed control handle is connected to the air inlet port I of the shuttle valve II, the remote cable retraction is connected to the air inlet port II of the shuttle valve II, the exhaust port of the shuttle valve II is connected to the cable retraction control port of the three-position five-way pneumatic reversing valve, the exhaust port of the shuttle valve II is also connected to the air inlet port of the shuttle valve I, and the exhaust port of the shuttle valve I is connected to the control port of the two-position five-way pneumatic reversing valve;

[0019] The speed adjustment exhaust port of the proportional reversing speed regulating handle is connected to the control air port and main air inlet of the two-position three-way pneumatic reversing valve III. The remote speed adjustment is connected to the control air port and main air inlet of the other end of the two-position three-way pneumatic reversing valve III. The exhaust port of the two-position three-way pneumatic reversing valve III is connected to the air inlet of the pressure reducing valve I, and the exhaust port of the pressure reducing valve I is connected to the control air port of the pressure reducing valve II.

[0020] The cable-releasing exhaust port of the proportional reversing speed regulating handle is connected to the control port and main air inlet of the two-position three-way pneumatic directional valve IV. At the same time, the remote cable-releasing device is connected to the control port and main air inlet of the other end of the two-position three-way pneumatic directional valve IV. The exhaust port of the two-position three-way pneumatic reversing valve IV is connected to the cable-releasing control port of the three-position five-way pneumatic directional valve. The exhaust port of the shuttle valve II is simultaneously connected to the air inlet of the shuttle valve I. The exhaust port of the shuttle valve I is connected to the control port of the two-position five-way pneumatic directional valve.

[0021] Brake circuit: The platform air source enters the air inlet of the brake handle, the exhaust port of the brake handle is connected to the main air inlet and control air circuit of the two-position three-way pneumatic reversing valve I, the remote brake is connected to the main air inlet and control air circuit at the other end of the two-position three-way pneumatic reversing valve I, the exhaust port of the two-position three-way pneumatic reversing valve I is connected to the air inlet and the other end control port of the two-position three-way pneumatic reversing valve II, and the exhaust port of the two-position three-way pneumatic reversing valve II is connected to the pneumatic brake.

[0022] The beneficial effects of the present invention are:

[0023] (1) The system of the present invention uses different tensions to retract and lower the hydraulic pipe of the blowout preventer according to different operating conditions of the blowout preventer, which facilitates the automatic retraction and release of the hydraulic pipe, effectively protects the safety of the hydraulic pipe, and solves the problems of low efficiency and poor safety existing in the fully manual operation mode of the traditional hydraulic pipe winch;

[0024] (2) The system of the present invention is provided with a hydraulic slip ring and a circulating cooling circuit is added to the main oil circuit of the working medium of the blowout preventer, and the platform air source is used for cooling, thereby reducing the risk of underwater blowout preventer operation and solving the problem that the hydraulic pipe winch of the blowout preventer causes severe heating of the blowout preventer hydraulic pipe due to the lack of a circulating cooling device, causing the internal seals of the blowout preventer to age and fail, thereby causing quality accidents;

[0025] (3) The cable arranger of the system of the present invention can adjust the transmission ratio between the winch drum and the cable arranger according to the hydraulic cables of different diameters, so that the winch drum can rotate one circle and the cable arranger can synchronously move a distance equivalent to the width of the cable in the horizontal direction, thereby solving the problem of replacing different hydraulic pipe winches when lowering or recovering hydraulic pipes of blowout preventers of different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the structure of the system of the present invention;

[0027] Figure 2 A schematic structural diagram of the locking mechanism in the system of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the cable arrangement device in the system of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the left arc-shaped support plate and the adjustment mechanism in the cable arranger of the system of the present invention;

[0030] Figure 5 Schematic diagram of the structure of the adjustment mechanism in the cable arranger of the system of the present invention;

[0031] Figure 6 Schematic diagram of the structure of the hydraulic slip ring in the system of the present invention;

[0032] Figure 7 This is a schematic diagram of the gas control system in the system of the present invention.

[0033] In the figure, 1. drive assembly;

[0034] 2. Locking mechanism, 2-1. Housing, 2-2. Return spring, 2-3. Friction wheel, 2-4. Wedge frame, 2-5. Clearance adjustment bolt, 2-6. Pneumatic cylinder;

[0035] 3. Winch drum, 4. Bearing seat, 5. Replaceable sprocket, 6. Chain;

[0036] 7. Cable arranger, 7-1. Adjustment mechanism, 7-1-1. Handwheel, 7-1-2. Sprocket I, 7-1-3. Sprocket II, 7-1-4. Sprocket III, 7-1-5. Smooth bar sleeve, 7-1-6. Lead screw sleeve, 7-2. Right curved support plate, 7-3. Curved cable winder, 7-3-1. Lead screw, 7-3-2. Smooth bar, 7-4. Left curved support plate;

[0037] 8. Pneumatic control system, 8-1. Proportional reversing speed control handle, 8-2. Platform air source, 8-3. Remote interface, 8-4. 2 / 3-way pneumatic directional control valve I, 8-5. 2 / 3-way pneumatic directional control valve II, 8-6. Pneumatic brake, 8-7. 2 / 5-way pneumatic directional control valve, 8-8. Shuttle valve I, 8-9. Butterfly valve, 8-10. Pneumatic motor, 8-11. Quick exhaust valve, 8-12. 3 / 5-way pneumatic directional control valve, 8-13. Shuttle valve II, 8-14. 2 / 3-way pneumatic directional control valve III, 8-15. Pressure reducing valve I, 8-16. Pressure reducing valve II, 8-17. Brake handle, 8-18. 2 / 3-way pneumatic directional control valve IV, 8-19. Pressure reducing valve III, 8-20. Muffler;

[0038] 9. Hydraulic slip ring, 9-1. Stator, 9-2. Wear-resistant block, 9-3. Rotor, 9-4. Oil inlet port, 9-5. Air inlet port, 9-6. Oil inlet channel, 9-7. Air inlet cooling channel, 9-8. Sealing ring;

[0039] 10. Pneumatic brake. DETAILED DESCRIPTION

[0040] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] Example 1

[0042] The hydraulic pipe system for lowering and recovering underwater blowout preventers of the present invention has a structure as follows Figure 1 As shown, it includes a winch drum 3, and a drive assembly 1 and a bearing seat 4 are respectively provided on the shafts at both ends of the winch drum 3. The drive assembly 1 is used to drive the winch drum 3 to rotate, and the bearing seat 4 is used to support the winch drum 3; a replaceable sprocket 5 and a hydraulic slip ring 9 are successively installed on the protruding shaft on the other side of the bearing seat 4, and the replaceable sprocket 5 is connected to a cable arranger 7 through a chain 6; the hydraulic pipe of the underwater blowout preventer is introduced into the winch drum 3 through the hydraulic slip ring 9, and then led out from the winch drum 3 to the cable arranger 7, and finally led from the cable arranger 7 to the underwater blowout preventer. The cable arranger 7 is used to arrange the hydraulic pipes in an orderly manner along the winch drum 3; the drive assembly 1 is connected to the air control system 8, and the air control system 8 is used to control the drive assembly 1 to drive the winch drum 3.

[0043] Example 2

[0044] Based on Example 1, the hydraulic pipe system for lowering and recovering an underwater blowout preventer of the present invention further includes a pneumatic brake 10, which is mounted on the flange surface of the winch drum 3 and is used to achieve an emergency stop. The system also includes a locking mechanism 2, which is disposed on the legs of the winch drum 3.

[0045] Example 3

[0046] The hydraulic pipe system for lowering and recovering underwater blowout preventers of the present invention has a structure as follows Figure 1 As shown, the system includes a drive assembly 1, a locking mechanism 2, a winch drum 3, a bearing seat 4, a replaceable sprocket 5, a chain 6, a cable arranger 7, an air control system 8, a hydraulic slip ring 9, and a pneumatic brake 10. The air control system 8 controls the drive assembly 1 to drive the winch drum 3 in forward or reverse rotation, thereby lowering or retrieving the BOP hydraulic hose. The bearing seat 4 is located at the rear end of the winch drum 3 and supports the drum 3 for rotation. The replaceable sprocket 5 is mounted on the shaft extending from the bearing seat 4. The replaceable sprocket 5 drives the cable arranger 7 via the chain 6 to ensure the correct, neat, and orderly arrangement of the BOP hydraulic hoses along the winch drum 3. The hydraulic slip ring 9, also known as a hydraulic rotary joint, is used to transmit the hydraulic oil required for the operation of the underwater BOP between the two relatively rotating hydraulic hoses and the winch drum 3. The hydraulic slip ring 9 is fastened to the rear end of the bearing seat 4 via threads on its outer surface. The hydraulic hose of the underwater blowout preventer (BOP) on the drilling deck is routed through a hydraulic slip ring 9 to the winch drum 3. From the winch drum 3, it is then routed to a cable reel 7, which then leads back to the underwater BOP. When lowering or retrieving the hydraulic hose of the underwater BOP in an emergency, the pneumatic brake 10 is activated to achieve an emergency stop. If the winch drum 3 is inactive for an extended period, a locking mechanism 2 is used to prevent the drum from slipping and causing a safety accident.

[0047] like Figure 2As shown, the locking mechanism 2 is integrally welded to the legs of the winch drum 3 and comprises a pneumatic cylinder 2-6. The output shaft of the pneumatic cylinder 2-6 is connected to a clearance adjustment bolt 2-5, the other end of which is connected to a wedge frame 2-4. The wedge frame 2-4 is entirely located within the housing 2-1. Its forwardmost extension shaft passes through the housing 2-1 and is inserted into the locking hole of the winch drum 3, mechanically locking the winch drum 3. Several return springs 2-2 are connected to the wedge frame 2-4. The return springs 2-2 are connected to the housing 2-1 and the wedge frame 2-4 at both ends via pins. The return springs 2-2 are used to limit the relative movement of the wedge frame 2-4 and the housing 2-1. Two sets of friction wheels 2-3 are also mounted on the housing 2-1. These friction wheels are located on either side of the wedge frame 2-4, contacting the wedge frame 2-4 and limiting its motion. The clearance adjustment bolt 2-5 is used to adjust the vertical distance between the wedge frame 2-4 and the two sets of friction wheels 2-3. When the locking mechanism 2 is not in contact with the winch drum 3, rotating the clearance adjustment bolt 2-5 clockwise moves the wedge frame 2-4 downward, increasing the vertical distance between the extension axis of the wedge frame 2-4 and the two sets of friction wheels 2-3, thereby bringing the locking mechanism 2 into contact with the winch drum 3. When the pneumatic cylinder 2-6 extends, it drives the wedge frame 2-4 outward. The friction force of the two sets of friction wheels 2-3 engages the wedge frame 2-4, automatically locking the winch drum 3. When the pneumatic cylinder 2-6 retracts, it also drives the wedge frame 2-4 back, causing the return spring 2-2 to reset, automatically unlocking the winch drum 3. The two sets of friction wheels 2-3 not only guide the movement of the wedge frame 2-4 but also increase the locking force between the friction wheels 2-3 and the wedge frame 2-4 during locking. The locking mechanism 2 introduces pneumatic cylinders 2-6 to facilitate automation and reduce the operator's labor intensity.

[0048] like Figure 3 、 Figure 4 As shown, the cable arrangement 7 includes an arcuate cable winder 7-3, which includes a lead screw 7-3-1 and a guide bar 7-3-2. A left arcuate support plate 7-4 and a right arcuate support plate 7-2 are provided at each end of the arcuate cable winder 7-3. The lead screw 7-3-1 and guide bar 7-3-2 of the arcuate cable winder 7-3 extend partially beyond the left arcuate support plate 7-4. An adjustment mechanism 7-1 is provided on the extended portion of the arcuate cable winder 7-3. This adjustment mechanism 7-1 is used to adjust the hydraulic cables of different diameters when the same winch drum 3 is used for retracting and releasing the cables, thereby preventing tangled or misaligned cables.

[0049] The curved cable winder 7-3 rotates along the left and right curved support plates 7-4 and 7-2, which are strictly coaxial with the winch drum 3. The adjustment mechanism 7-1 rotates along the lead screw 7-3-1 and optical bar 7-3-2 in the curved cable winder 7-3. After the rotation angle is completed, the adjustment mechanism 7-1 penetrates the extended portion of the lead screw 7-3-1 and optical bar 7-3-2 to adjust the cable entry angle, thereby changing the cable exit direction to adapt to the spatial layout of different drilling platforms.

[0050] like Figure 4 、 Figure 5 As shown, the adjustment mechanism 7-1 is generally arc-shaped, with the same curvature as the arc-shaped cable winder 7-3. The adjustment mechanism 7-1 comprises a handwheel 7-1-1, sprocket I 7-1-2, and sprocket II 7-1-3, which are connected in sequence and coaxially. A smooth rod sleeve 7-1-5 and a lead screw sleeve 7-1-6 are respectively provided on either side of sprocket II 7-1-3, with sprocket II 7-1-3 positioned midway between the smooth rod sleeve 7-1-5 and the lead screw sleeve 7-1-6. The smooth rod sleeve 7-1-5 and the lead screw sleeve 7-1-6 are respectively installed along the smooth rod 7-3-2 and the lead screw 7-3-1 on the left side of the arc-shaped cable winder 7-3. A sprocket III 7-1-4 is mounted on the lead screw sleeve 7-1-6, which is connected to the sprocket II 7-1-3 via a chain. Drive assembly 1 drives winch drum 3, which in turn drives replaceable sprocket 5. Replaceable sprocket 5 drives sprocket I 7-1-2 in adjustment mechanism 7-1 via chain 6. Sprocket I 7-1-2 is coaxial with sprocket II 7-1-3. Sprocket II 7-1-3 drives sprocket III 7-1-4, which is sleeved on leadscrew 7-3-1 of arc-shaped cable winder 7-3. This in turn drives cable arranger 7 to rotate, ensuring the correct, neat, and orderly arrangement of the BOP hydraulic hoses along winch drum 3. If other platforms use different types of BOPs with different diameters of their control hydraulic hoses, they can simply be re-matched by changing the number of teeth on sprocket I 7-1-2, sprocket II 7-1-3, and sprocket III 7-1-4.

[0051] like Figure 6 As shown, the hydraulic slip ring 9 comprises a centrally located rotor 9-3 and an outer stator 9-1, separated by a wear-resistant block 9-2. An oil inlet channel 9-6 and an air inlet cooling channel 9-7 are defined within the rotor 9-3, while an oil inlet port 9-4 and an air inlet port 9-5 are defined within the stator 9-1. The oil inlet channel 9-6 communicates with the oil inlet port 9-4, while the air inlet cooling channel 9-7 communicates with the air inlet port 9-5. The BOP hydraulic line enters the drawworks drum 3 from the oil inlet port 9-4 through the oil inlet channel 9-6. The air cooling line is discharged to the atmosphere from the air inlet port 9-5 through the air inlet cooling channel 9-7. The addition of the air inlet cooling channel 9-7 within the rotor 9-3 facilitates cooling of the working medium within the BOP hydraulic line.

[0052] Figure 7 This is the principle diagram of the air control system 8. The air control system 8 has two modes: local operation and remote operation. To adapt to different operating water depths, there are multiple lowering / recovery operating pressures available for construction operations, and it has advantages such as controllable braking torque.

[0053] like Figure 7 As shown, the connection method of the components in the gas control system 8 is specifically as follows:

[0054] Platform air source 8-2 is connected to the air inlet of pressure reducing valve II 8-16. A butterfly valve 8-9 is introduced in the middle of this air path. Opening butterfly valve 8-9 checks whether the platform air source meets design requirements. The outlet of pressure reducing valve II 8-16 is connected to the air inlet of 5 / 3-way pneumatic reversing valve 8-12, which in turn is connected to the air inlet of quick-exhaust valve 8-11. Muffler 8-20 is connected to the exhaust port of quick-exhaust valve 8-11, which in turn is connected to the air inlet of pneumatic motor 8-10. Pneumatic motor 8-10 drives the winch drum 3 in forward or reverse rotation, retrieving or lowering the cable.

[0055] The platform air source 8-2 is simultaneously connected to the control air path of the proportional reversing speed regulating handle 8-1. The exhaust port of the proportional reversing speed regulating handle 8-1 is divided into three paths, namely, the cable releasing exhaust port, the speed regulating exhaust port, and the cable collecting exhaust port.

[0056] The cable retraction exhaust port of proportional reversing speed control handle 8-1 is connected to the air inlet I of shuttle valve II 8-13. Remote cable retraction is connected to the air inlet II of shuttle valve II 8-13. The exhaust port of shuttle valve II 8-13 is connected to the cable retraction control port of 3 / 5-way pneumatic reversing valve 8-12, controlling the reversing of 3 / 5-way pneumatic reversing valve 8-12. The exhaust port of shuttle valve II 8-13 is also connected to the air inlet of shuttle valve I 8-8. The exhaust port of shuttle valve I 8-8 is connected to the control port 8-7 of 2 / 5-way pneumatic reversing valve, controlling the platform air source 8-2 to enter the air inlet of hydraulic slip ring 9.

[0057] The speed control exhaust port of proportional reversing speed control handle 8-1 is connected to the control port and main air inlet of two-position, three-way pneumatic reversing valve III 8-14. Remote speed control is connected to the control port and main air inlet of the other end of two-position, three-way pneumatic reversing valve III 8-14. The exhaust port of two-position, three-way pneumatic reversing valve III 8-14 is connected to the air inlet of pressure reducing valve I 8-15, and the exhaust port of pressure reducing valve I 8-15 is connected to the control port of pressure reducing valve II 8-16. This controls the amount of platform air source 8-1 entering pneumatic motor 8-10, thereby achieving speed adjustment for pneumatic motor 8-10.

[0058] The cable-releasing exhaust port of the proportional reversing speed control handle 8-1 is connected to the control port and main air inlet of the 2 / 3 / 3-way pneumatic reversing valve IV 8-18. Simultaneously, the remote cable-releasing function is connected to the control port and main air inlet of the other end of the 2 / 3 / 3-way pneumatic reversing valve IV 8-18. The exhaust port of the 2 / 3 / 3-way pneumatic reversing valve IV 8-18 is connected to the cable-releasing control port of the 3 / 5 / 3-way pneumatic reversing valve 8-12, controlling the direction of the 3 / 5 / 3-way pneumatic reversing valve 8-12. The exhaust port of the shuttle valve II 8-13 is also connected to the air inlet of the shuttle valve I 8-8. The exhaust port of the shuttle valve I 8-8 is connected to the control port 8-7 of the 2 / 5 / 3-way pneumatic reversing valve, controlling the platform air source 8-2 to enter the air inlet of the hydraulic slip ring 9.

[0059] Brake circuit: Platform air source 8-2 enters the inlet of brake handle 8-17. The exhaust of brake handle 8-17 is connected to the main inlet and control air lines of 2-position, 3-way pneumatic reversing valve I 8-4. The remote brake is connected to the main inlet and control air lines at the other end of 2-position, 3-way pneumatic reversing valve I 8-4. The exhaust of 2-position, 3-way pneumatic reversing valve I 8-4 is connected to the inlet and control port at the other end of 2-position, 3-way pneumatic reversing valve II 8-5. The exhaust of 2-position, 3-way pneumatic reversing valve II 8-5 is connected to pneumatic brake 8-6.

[0060] The working principle of the gas control system 8 is:

[0061] Before construction, open the butterfly valve 8-9 and check whether the gas source meets the construction requirements from the outlet (10m 3 If the platform air supply meets the construction requirements, in local operation mode, first open brake handle 8-17 to adjust the pressure of pressure reducing valve III 8-19, thereby adjusting the clamping force of pneumatic brake 8-6. Platform air supply 8-2 is split into two routes: one route passes through brake handle 8-17 and enters the main valve core of 2-position 3-way pneumatic reversing valve II 8-5; the other route passes through pressure reducing valve III 8-19 and enters the control valve core of 2-position 3-way pneumatic reversing valve II 8-5, opening 2-position 3-way pneumatic reversing valve II 8-5. Platform air supply 8-2 then enters pneumatic brake 8-6, applying the pneumatic brake. Then, when the proportional reversing speed regulating handle 8-1 is pushed forward, the platform air source 8-2 is divided into three paths. One path passes through the proportional reversing speed regulating handle 8-1 to reach the shuttle valve II 8-13, and finally reaches the upper end of the three-position five-way pneumatic reversing valve 8-12; the other path passes through the pressure reducing valve II 8-16, passes through the main valve core of the three-position five-way pneumatic reversing valve 8-12, and finally reaches the air inlet of the pneumatic motor 8-10, driving the pneumatic motor 8-10 to rotate clockwise. At this time, the winch drum 3 is in the cable-reeling state; at the same time, the last path of the platform air source 8-2 passes through the brake handle 8-17 and the two-position three-way pneumatic reversing valve I 8-4 to reach the two-position three-way pneumatic reversing valve II 8-5, thereby driving the pneumatic brake 8-6 to open.

[0062] In the local operation mode, when the proportional reversing speed regulating handle 8-1 is pushed back, the platform air source 8-2 is divided into three paths. One path passes through the proportional reversing speed regulating handle 8-1 to reach the two-position three-way pneumatic reversing valve IV 8-18, and at the same time opens the left enabling end of the two-position three-way pneumatic reversing valve IV 8-18, and the platform air source 8-2 passes through the two-position three-way pneumatic reversing valve IV 8-18 to the lower end of the three-position five-way pneumatic reversing valve 8-12; the other path passes through the pressure reducing valve II 8-16, passes through the main valve core of the three-position five-way pneumatic reversing valve 8-12, and finally reaches the air inlet of the pneumatic motor 8-10, driving the pneumatic motor 8-10 to rotate counterclockwise. At this time, the winch drum 3 is in the cable-releasing state; at the same time, the last path of the platform air source 8-2 passes through the brake handle 8-17 and the two-position three-way pneumatic reversing valve I 8-4 to reach the two-position three-way pneumatic reversing valve II 8-5, thereby driving the pneumatic brake 8-6 to open.

[0063] Platform air source 8-2 flows through proportional reversing speed control handle 8-1 and pressure reducing valve I 8-15 to the pilot port of pressure reducing valve II 8-16. The amount of pressure applied to proportional reversing speed control handle 8-1 controls the opening of pressure reducing valves I 8-15 and II 8-16, thereby controlling the amount of air entering the three-position, five-way pneumatic directional valve 8-12. This in turn controls the speed of drive assembly 1, and thus the forward or reverse rotation speed of winch drum 3. Pressure reducing valve I 8-15 provides coarse regulation of the overall system pressure, while pressure reducing valve II 8-16 provides precise regulation, enabling the BOP hydraulic line to operate at varying pressures under different operating conditions.

[0064] Regardless of whether the three-position five-way pneumatic reversing valve 8-12 is working in the upper or lower valve position, the platform air source 8-2 can reach the upper valve position of the two-position five-way pneumatic reversing valve 8-7 through the shuttle valve I 8-8. After the upper valve position of the two-position five-way pneumatic reversing valve 8-7 is connected, the platform air source 8-2 continuously supplies air to the air inlet interface 9-5 of the hydraulic slip ring 9. The platform air source 8-2 circulates in the air inlet cooling channel 9-7 to cool the blowout preventer working medium in the oil inlet channel 9-6.

[0065] The remote interface 8 - 3 can realize the remote operation function of the gas control system 8 .

[0066] The working principle of the system of the present invention is:

[0067] First, adjust the number of teeth on the replaceable sprocket 5, as well as the number of teeth on sprockets I 7-1-2, II 7-1-3, and III 7-1-4 in the adjustment mechanism 7-1, based on the diameter of the blowout preventer's hydraulic cable. This ensures that the cable arranger 7 can move horizontally a distance equal to the cable width while the winch drum 3 rotates one revolution. Next, assemble the drive assembly 1, winch drum 3, bearing block 4, replaceable sprocket 5, and hydraulic slip ring 9 from left to right. After assembly, install the pneumatic brake 10 on the flange surface of the winch drum 3, weld the locking mechanism 2 to the frame legs, adjust the clearance bolts 2-5 to ensure the proper distance between the output shaft of the wedge frame 2-4 and the winch drum 3, install the cable arranger 7, and hook the chain 6. Verify that the movement direction and position of the cable arranger 7's travel mechanism meet the requirements. Assemble the adjustment mechanism 7-1, right curved support plate 7-2, curved cable winder 7-3, and left curved support plate 7-4. Adjust the angles of the curved cable winder 7-3, right curved support plate 7-2, and left curved support plate 7-4 to achieve the desired cable delivery angle. Connect the corresponding pipelines at the oil inlet port 9-4 and the air inlet port 9-5. Open the brake handle 8-17 and adjust the pressure of the pressure reducing valve III 8-19, thereby adjusting the clamping force of the pneumatic brake 8-6. The platform air source 8-2 is split into two paths: one path passes through the brake handle 8-17 and enters the main valve core of the 2-position 3-way pneumatic reversing valve II 8-5. The other path passes through the pressure reducing valve III 8-19 and enters the control valve core of the 2-position 3-way pneumatic reversing valve II 8-5. This opens the 2-position 3-way pneumatic reversing valve II 8-5, and the platform air source 8-2 enters the pneumatic brake 8-6, actuating the pneumatic brake. Then, when the proportional reversing speed regulating handle 8-1 is pushed forward, the platform air source 8-2 is divided into three paths. One path passes through the proportional reversing speed regulating handle 8-1 to reach the shuttle valve II 8-13, and finally reaches the upper end of the three-position five-way pneumatic reversing valve 8-12; the other path passes through the pressure reducing valve II 8-16, passes through the main valve core of the three-position five-way pneumatic reversing valve 8-12, and finally reaches the air inlet of the air motor 8-10, driving the air motor 8-10 to rotate clockwise. At this time, the winch drum 3 is in the cable reeling state. The reverse is also true.

Claims

1. The hydraulic pipe system for lowering and recovering underwater blowout preventers is characterized by: The invention comprises a winch drum (3), wherein a drive assembly (1) and a bearing seat (4) are respectively provided on shafts at both ends of the winch drum (3), the drive assembly (1) is used to drive the winch drum (3) to rotate, and the bearing seat (4) is used to support the winch drum (3); a replaceable sprocket (5) and a hydraulic slip ring (9) are sequentially installed on the extended shaft on the other side of the bearing seat (4), and the replaceable sprocket (5) is connected to a cable arranger (7) through a chain (6); a hydraulic pipe of an underwater blowout preventer is introduced into the winch drum (3) through the hydraulic slip ring (9), then led out from the winch drum (3) to the cable arranger (7), and finally led from the cable arranger (7) to the underwater blowout preventer, and the cable arranger (7) is used to arrange the hydraulic pipe in an orderly manner along the winch drum (3); the drive assembly (1) is connected to an air control system (8), and the air control system (8) is used to control the drive assembly (1) to drive the winch drum (3).

2. The hydraulic pipe system for lowering and recovering an underwater blowout preventer according to claim 1 is characterized in that: The system further comprises a pneumatic brake (10), which is mounted on the flange surface of the winch drum (3) and is used to achieve an emergency stop.

3. The hydraulic pipe system for lowering and recovering a subsea blowout preventer according to claim 1, characterized in that: The system further comprises a locking mechanism (2), which is arranged on the legs of the winch drum (3).

4. The hydraulic pipe system for lowering and recovering an underwater blowout preventer according to claim 3 is characterized in that: The locking mechanism (2) comprises a pneumatic cylinder (2-6), the output shaft of the pneumatic cylinder (2-6) is connected to a clearance adjustment bolt (2-5), the other end of the clearance adjustment bolt (2-5) is connected to a wedge frame (2-4), the wedge frame (2-4) is entirely located in a housing (2-1), and the frontmost extension shaft thereof passes through the housing (2-1) and is inserted into the locking hole of the winch drum (3); the wedge frame (2-4) is connected to a plurality of return springs (2-2), the two ends of the return springs (2-2) being respectively connected to the housing (2-1) and the wedge frame (2-4) via pins; and the housing (2-1) is further provided with two sets of friction wheels (2-3), which are respectively located on both sides of the wedge frame (2-4) and in contact with the wedge frame (2-4).

5. The hydraulic pipe system for lowering and recovering a subsea blowout preventer according to claim 1 is characterized in that: The cable arrangement device (7) comprises an arc-shaped cable winder (7-3), and the arc-shaped cable winder (7-3) comprises a lead screw (7-3-1) and a light bar (7-3-2); a left arc-shaped support plate (7-4) and a right arc-shaped support plate (7-2) are respectively provided at both ends of the arc-shaped cable winder (7-3); the lead screw (7-3-1) and the light bar (7-3-2) in the arc-shaped cable winder (7-3) pass through the left arc-shaped support plate (7-4) and still partially protrude outward, and the protruding portion is connected to an adjustment mechanism (7-1).

6. The hydraulic pipe system for lowering and recovering a subsea blowout preventer according to claim 5, characterized in that: The adjusting mechanism (7-1) is in an arc shape as a whole, and its arc is consistent with that of the arc-shaped cable winder (7-3); the adjusting mechanism (7-1) comprises a hand wheel (7-1-1), a sprocket I (7-1-2) and a sprocket II (7-1-3) which are connected in sequence and are coaxial, and a smooth rod sleeve (7-1-5) and a lead screw sleeve (7-1-6) are respectively provided on both sides of the sprocket II (7-1-3), and the sprocket II (7-1-3) is located between the smooth rod sleeve (7-1-5) and the lead screw sleeve ( The invention relates to a method for manufacturing a cable winder (7-3) comprising: mounting a light rod sleeve (7-1-5) and a lead screw sleeve (7-1-6), wherein the light rod sleeve (7-1-5) and the lead screw sleeve (7-1-6) are respectively connected to the light rod (7-3-2) and the lead screw (7-3-1) of the arc-shaped cable winder (7-3); a sprocket III (7-1-4) is installed on the lead screw sleeve (7-1-6), and the sprocket III (7-1-4) is connected to the sprocket II (7-1-3) through a chain; and the sprocket I (7-1-2) is connected to the replaceable sprocket (5) through a chain (6).

7. The hydraulic pipe system for lowering and recovering a subsea blowout preventer according to claim 1, characterized in that: The hydraulic slip ring (9) comprises a rotor (9-3) located in the center and a stator (9-1) located in the outer ring, wherein the rotor (9-3) and the stator (9-1) are separated by a wear-resistant block (9-2); An oil inlet passage (9-6) and an air inlet cooling passage (9-7) are provided in the rotor (9-3), an oil inlet interface (9-4) and an air inlet interface (9-5) are provided in the stator (9-1), the oil inlet passage (9-6) is communicated with the oil inlet interface (9-4), and the air inlet cooling passage (9-7) is communicated with the air inlet interface (9-5).

8. The hydraulic pipe system for lowering and recovering a subsea blowout preventer according to claim 1, characterized in that: The connection method of the components in the gas control system (8) is specifically as follows: The platform air source (8-2) is connected to the air inlet interface of the pressure reducing valve II (8-16), and a butterfly valve (8-9) is introduced in the middle of this air path. The air outlet of the pressure reducing valve II (8-16) is connected to the air inlet of the three-position five-way pneumatic reversing valve (8-12), and the air outlet of the three-position five-way pneumatic reversing valve (8-12) is connected to the air inlet of the quick exhaust valve (8-11). The muffler (8-20) is connected to the exhaust port of the quick exhaust valve (8-11), and the exhaust port of the quick exhaust valve (8-11) is also connected to the air inlet of the pneumatic motor (8-10). The platform air source (8-2) is simultaneously connected to the control air path of the proportional reversing speed regulating handle (8-1). The exhaust port of the proportional reversing speed regulating handle (8-1) is divided into three paths: a cable-releasing exhaust port, a speed-regulating exhaust port, and a cable-retracting exhaust port. The cable retraction exhaust port of the proportional reversing speed regulating handle (8-1) is connected to the air inlet port I of the shuttle valve II (8-13), the remote cable retraction is connected to the air inlet port II of the shuttle valve II (8-13), the exhaust port of the shuttle valve II (8-13) is connected to the cable retraction control port of the three-position five-way pneumatic reversing valve (8-12), the exhaust port of the shuttle valve II (8-13) is simultaneously connected to the air inlet port of the shuttle valve I (8-8), and the exhaust port of the shuttle valve I (8-8) is connected to the control air port (8-7) of the two-position five-way pneumatic reversing valve; The speed adjustment exhaust port of the proportional reversing speed regulating handle (8-1) is connected to the control air port and the main air inlet of the two-position three-way pneumatic reversing valve III (8-14), the remote speed adjustment is connected to the control air port and the main air inlet of the other end of the two-position three-way pneumatic reversing valve III (8-14), the exhaust port of the two-position three-way pneumatic reversing valve III (8-14) is connected to the air inlet of the pressure reducing valve I (8-15), and the exhaust port of the pressure reducing valve I (8-15) is connected to the control air port of the pressure reducing valve II (8-16); The cable-releasing exhaust port of the proportional reversing speed regulating handle (8-1) is connected to the control air port and main air inlet of the two-position three-way pneumatic reversing valve IV (8-18), and the remote cable-releasing is connected to the control air port and main air inlet of the other end of the two-position three-way pneumatic reversing valve IV (8-18). The exhaust port of the two-position three-way pneumatic reversing valve IV (8-18) is connected to the cable-releasing control port of the three-position five-way pneumatic reversing valve (8-12). The exhaust port of the shuttle valve II (8-13) is simultaneously connected to the air inlet of the shuttle valve I (8-8), and the exhaust port of the shuttle valve I (8-8) is connected to the control air port (8-7) of the two-position five-way pneumatic reversing valve. Brake circuit: The platform air source (8-2) enters the air inlet of the brake handle (8-17), the exhaust port of the brake handle (8-17) is connected to the main air inlet and control air path of the two-position three-way pneumatic reversing valve I (8-4), the remote brake is connected to the main air inlet and control air path at the other end of the two-position three-way pneumatic reversing valve I (8-4), the exhaust port of the two-position three-way pneumatic reversing valve I (8-4) is connected to the air inlet and the other end control port of the two-position three-way pneumatic reversing valve II (8-5), and the exhaust port of the two-position three-way pneumatic reversing valve II (8-5) is connected to the pneumatic brake (8-6).

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