Lowering and recovery underwater bop umbilical constant force device

Abstract

The application discloses a constant force device for lowering and recovering underwater BOP umbilical cables, which comprises a main frame, transition rods and connecting rods which are arranged in parallel and are connected to the top of the main frame by bolts, two fixed units which are arranged oppositely and are fixed to the top of the main frame, a cable arranging assembly which is connected between the two fixed units, a tension adjusting device which is connected to the cable arranging assembly, a cable winding drum which is arranged directly below the fixed unit and is connected to the tension adjusting device, a pneumatic motor which is connected to the tension adjusting device, a gas control system which is connected to the pneumatic motor through pipelines, and a control system which is connected to the gas control system through wires. The cable arranging device cannot be adjusted along with the change of the cable angle of the umbilical cable, and the problem that the lowering and recovering device of the blowout preventer multi-line cable can only be used on a single drilling platform is solved.

Description

Technical Field

[0001] This invention belongs to the technical field of marine oil and gas production equipment, specifically relating to a constant force device for lowering and recovering underwater BOP umbilical cables. Background Technology

[0002] Due to the numerous and complex uncertainties in the seabed formations, each drilling operation carries the potential for a blowout, placing higher demands on well control technology and equipment. The blowout preventer (BOP), as the most crucial well control equipment, must be rapidly activated to shut down the well in the event of emergencies such as overflows, kicks, or blowouts during drilling operations. Failure of the BOP at this time will lead to a blowout. BOP activation requires coordination between the remote control console, the driller's console, alarm devices, and control lines. The driller's console is located on the deck, and control lines connect the driller's console or remote control console to the subsea BOP for communication. Traditional deployment and retrieval systems use fixed cable guides. Different drilling platforms have different cable entry angles for the multiple cables used for deploying and retrieving the BOP, and the cable guide does not adjust accordingly. This limits the use of umbilical winches for deploying and retrieving the subsea BOP to a single drilling platform.

[0003] During the lowering and retrieval of multiple cables of the blowout preventer (BOP), jamming may occur. When jamming occurs, due to the lack of tension adjustment device, there is a risk that the umbilical cable will be broken, which will affect the normal operation of the underwater BOP. Summary of the Invention

[0004] The purpose of this invention is to provide a constant force device for the deployment and retrieval of underwater BOP umbilical cables to solve the problems mentioned in the background art.

[0005] The technical solution adopted in this invention is a constant force device for deploying and recovering underwater BOP umbilical cables, comprising a main frame. The top of the main frame is connected by bolts to a transition rod and a connecting rod arranged parallel to each other. Two oppositely arranged fixing units are fixed to the top of the main frame. Both fixing units are located within the main frame. A cable laying assembly is connected between the two fixing units. The cable laying assembly is connected to a tension adjusting device. The tension adjusting device is connected to a cable winding drum. The cable winding drum is located directly below the fixing units. The tension adjusting device is also connected to a pneumatic motor. The pneumatic motor is connected to a pneumatic control system via a pipeline. The pneumatic control system is connected to a control system via a wire.

[0006] The invention is further characterized in that, The fixing unit includes two opposing support rods, which are respectively fixed to the bottom of the crossbar at the top of the main frame. An arc-shaped connecting plate is connected between the two support rods by adjusting screws. The cable winding roller is located directly below the two arc-shaped connecting plates. Several connecting holes are evenly opened on the surface of the arc-shaped connecting plates along its circumference. The two arc-shaped connecting plates are connected to the cable assembly.

[0007] The support rod has several adjusting screw holes along its length.

[0008] The cable laying assembly includes two oppositely arranged connecting plates, with a drive shaft passing through between the two connecting plates. One end of the drive shaft is connected to a drive sprocket, and two cable laying rollers arranged side by side are connected between the two connecting plates. The two cable laying rollers are respectively located on both sides of the drive shaft, and the drive sprocket is connected to a tension adjustment device.

[0009] The connecting plate has three pairs of holes evenly distributed around its circumference, and these three pairs of holes are positioned opposite to the three connecting holes adjacent to the arc-shaped connecting plate.

[0010] The number of tension adjustment devices is set to six, and the six tension adjustment devices are evenly arranged circumferentially along the side of the cable winding drum.

[0011] The tension adjustment device includes two L-shaped connecting plates arranged opposite each other. One side of each L-shaped connecting plate is connected to the cable winding drum by fixing screws. The other side of the L-shaped connecting plate is connected to a fixing plate. The cross-section of the fixing plate is set with an "F" shape. A second adjustment plate is provided on the inner wall of the fixing plate. A sprocket ring is connected inside the fixing plate. A chain is fixed to the edge of the sprocket ring along its circumference. The chain meshes with the sprocket on the output shaft of the pneumatic motor and meshes with the drive sprocket.

[0012] A pad is also connected between the L-shaped connecting plate and the winding drum. Two wear-resistant plates are provided on the inner wall of the fixed plate. The wear-resistant plates are located on both sides of the sprocket ring. Fastening screws are passed through the side wall of the fixed plate. The ends of the fastening screws contact the wear-resistant plates. A first adjusting plate is also connected between the L-shaped connecting plate and the fixed plate.

[0013] The bottom of the main frame is connected to a pneumatic brake, which is located near the pneumatic motor and is matched with the cable winding drum.

[0014] The bottom of the main frame is also connected to a mechanical locking device. The mechanical locking device is located away from the pneumatic motor. The mechanical locking device includes a locking cylinder, which is connected to the bottom of the main frame. A sliding groove is opened on the side wall of the locking cylinder along its length. A locking pin is slidably connected inside the locking cylinder. A push post is fixedly connected to the side wall of the locking pin, and the push post matches the sliding groove.

[0015] The beneficial effects of this invention are: This invention relates to a constant-force device for lowering and retrieving underwater BOP umbilical cables. Six sets of tension adjustment devices are evenly distributed on the outer wall of the cable winding drum. When jamming occurs during the lowering and retrieval of the umbilical cable, the tension adjustment devices allow the pneumatic motor-driven sprocket ring to rotate freely without rotating the cable winding drum, thus protecting the umbilical cable. A full-circle chain is welded to the outer wall of the sprocket ring. The chain follows the rotation of the sprocket ring, driving the sprocket of the cable laying assembly, ensuring orderly, neat, and accurate cable laying on the cable winding drum. The sprocket ring directly drives the cable laying assembly, resulting in high transmission efficiency. The flexible arrangement of the cable laying assembly solves the problem of the cable laying assembly not adjusting to changes in the umbilical cable entry angle. It also addresses the limitation of BOP multi-path cable lowering and retrieval devices being usable only on a single drilling platform. Attached Figure Description

[0016] Figure 1 This is a front view of the constant force device for lowering and retrieving underwater BOP umbilical cables according to the present invention; Figure 2 This is a left view of the constant force device for lowering and retrieving the underwater BOP umbilical cable of the present invention; Figure 3 This is a schematic diagram of the main frame structure of the underwater BOP umbilical cable constant force device for lowering and recovering the present invention; Figure 4 This is a schematic diagram of the cable laying assembly in the underwater BOP umbilical cable constant force device for lowering and recovering the present invention; Figure 5 This is a schematic diagram of the tension adjustment device in the constant force device for lowering and recovering the underwater BOP umbilical cable of the present invention; Figure 6 This is a schematic diagram of the mechanical locking device in the constant force device for lowering and recovering the underwater BOP umbilical cable of the present invention.

[0017] In the diagram, 1. Main frame, 1-1. Transition rod, 1-2. Arc-shaped connecting plate, 1-3. Support rod, 1-4. Connecting rod, 1-5. Adjusting screw, 1-6. Connecting hole, 2. Tension adjustment device, 2-1. Pad, 2-2. L-shaped connecting plate, 2-3. Fixing plate, 2-4. First adjusting plate, 2-5. Second adjusting plate, 2-6. Wear-resistant plate, 2-7. Fastening screw, 2-8. Fixing screw, 3. Machine Mechanical locking device, 3-1. Locking pin, 3-2. Locking cylinder, 3-3. Push column, 4. Cable winding roller, 5. Pneumatic brake, 6. Pneumatic control system, 7. Pneumatic motor, 8. Remote control box, 9. Operating panel, 10. Chain, 11. Cable assembly, 11-1. Connecting plate, 11-2. Drive sprocket, 11-3. Cable winding roller, 11-4. Drive shaft, 11-5. Alignment hole, 12. Umbilical cable, 13. Sprocket ring. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0019] The mechanical locking device in the constant force device for lowering and recovering the underwater BOP umbilical cable of this invention, such as... Figure 1-2 As shown, the device includes a main frame 1. The top of the main frame 1 is bolted with parallel transition rods 1-1 and connecting rods 1-4. The side columns of the main frame 1 have several limiting holes along their length. Two opposing fixing units are fixed to the bottom of the main frame 1, both located within the main frame 1. A cable assembly 11 connects the two fixing units, and a tension adjusting device 2 connects to it. The tension adjusting device 2 connects to a cable winding roller 4, which is positioned directly below the fixing units. An umbilical cable 12 is wound around the cable winding roller 4. The tension adjusting device 2 is also connected to a pneumatic motor 7, which is connected to a pneumatic control system 6 via a pipeline. The pneumatic control system 6 is connected to a control system via wires. The control system can be either an operating console 9 or a remote control box 8. The operating console 9 is connected to the top of the main frame 1, and the remote control box 8 is located in the extended space of the cable winding roller 4. The remote control box 8 is controlled by a remote controller, eliminating the need for an operator to be constantly near the device. The transition rod 1-1 and the connecting rod 1-4 are bolted to the main frame 1, which is easy to disassemble during use. The transition rod 1-1 and the connecting rod 1-4 can be disassembled to allow the cable winding drum 4 to pass through from both sides of the main frame 1.

[0020] The remote control box 8 or the control panel 9 controls the rotation of the pneumatic motor 7 through the pneumatic control system 6. The start motor 7 drives the cable winding drum 4 to rotate forward or backward, thereby realizing the retrieval and lowering of the umbilical cable 12. The rotation of the cable winding drum 4 drives the rotation of the cable laying assembly 11. The umbilical cable 12 passes through the cable laying assembly 11, thereby realizing the orderly and neat laying of the umbilical cable 12.

[0021] like Figure 3 As shown, the fixing unit includes two opposing support rods 1-3, which are respectively fixed to the bottom of the crossbar at the top of the main frame 1. An arc-shaped connecting plate 1-2 is connected between the two support rods 1-3 by adjusting screws 1-5. The cable winding roller 4 is located directly below the two arc-shaped connecting plates 1-2. Several connecting holes 1-6 are evenly opened on the surface of the arc-shaped connecting plate 1-2 along its circumference. The two arc-shaped connecting plates 1-2 are connected to the cable assembly 11.

[0022] The support rod 1-3 has several adjusting screw holes along its length. The multiple adjusting screw holes allow for adjustment of the height of the arc-shaped connecting plate 1-2 according to the actual size of the cable winding drum 4.

[0023] like Figure 4As shown, the cable laying assembly 11 includes two opposing connecting plates 11-1, with a drive shaft 11-4 passing between them. One end of the drive shaft 11-4 is connected to a drive sprocket 11-2. Two cable laying rollers 11-3 are connected between the two connecting plates 11-1, positioned side-by-side on either side of the drive shaft 11-4. The drive sprocket 11-2 is connected to a tension adjusting device 2. Rotation of the cable rollers 11-3 drives the drive sprocket 11-2, which in turn drives the drive shaft 11-4. The umbilical cable 12 passes between the cable laying rollers 11-3 and the drive shaft 11-4 to perform the cable laying operation.

[0024] The connecting plate 11-1 has three pairs of holes 11-5 evenly distributed around its circumference. These three pairs of holes 11-5 are positioned opposite to the three connecting holes 1-6 adjacent to the arc-shaped connecting plate 1-2. The three pairs of holes 11-5 being positioned opposite to any three adjacent connecting holes 1-6 allows for adjustment of the angle of the cable assembly 11, facilitating cable routing operations.

[0025] The number of tension adjustment devices 2 is set to six, and the six tension adjustment devices are evenly arranged circumferentially along the side of the cable winding drum 4.

[0026] like Figure 5 As shown, the tension adjusting device 2 includes two L-shaped connecting plates 2-2 arranged opposite each other. One side of each L-shaped connecting plate 2-2 is connected to the cable winding drum 4 by fixing screws 2-8. The other side of the L-shaped connecting plate 2-2 is connected to a fixing plate 2-3. The cross-section of the fixing plate 2-3 is set with an "F" shape. A second adjusting plate 2-5 is provided on the inner wall of the fixing plate 2-3. A sprocket ring 13 is connected inside the fixing plate 2-3. A chain 10 is fixedly connected to the edge of the sprocket ring 13 along its circumference. The chain 10 meshes with the sprocket on the output shaft of the pneumatic motor 7 and meshes with the drive sprocket 11-2. The chain 10 and the sprocket ring 13 are welded together, and there is no relative movement between them.

[0027] A pad 2-1 is also connected between the L-shaped connecting plate 2-2 and the cable winding drum 4. Two opposing wear-resistant plates 2-6 are provided on the inner wall of the fixing plate 2-3, positioned on both sides of the sprocket ring 13. Fastening screws 2-7 pass through the side wall of the fixing plate 2-3, with the ends of the screws contacting the wear-resistant plates 2-6. A first adjusting plate 2-4 is also connected between the L-shaped connecting plate 2-2 and the fixing plate 2-3. Increasing or decreasing the first adjusting plate 2-4 and the second adjusting plate ensures the coaxiality of the sprocket ring 13 and the cable winding drum 4. The fastening screws 2-7 press against the wear-resistant plates 2-6, clamping the sprocket ring 13. When the umbilical cable 12 becomes stuck below or during retrieval, loosening the fastening screws 2-7 allows the pneumatic motor 7 to idle without rotating the cable winding drum 4, facilitating adjustment and maintenance by workers and thus protecting the umbilical cable 12.

[0028] A pneumatic brake 5 is connected to the bottom of the main frame 1. The pneumatic brake 5 is located near the pneumatic motor 7 and is matched with the cable winding drum 4. The model of the pneumatic brake 5 is 5021-s. After the operation is completed, the pneumatic brake 5 is activated to lock the cable winding drum 4, and then the mechanical locking device 3 is used for mechanical locking.

[0029] like Figure 6 As shown, a mechanical locking device 3 is also connected to the bottom of the main frame 1. The mechanical locking device 3 is located away from the pneumatic motor 7. The mechanical locking device 3 includes a locking cylinder 3-2, which is connected to the bottom of the main frame 1. A sliding groove is opened on the side wall of the locking cylinder 3-2 along its length. A locking pin 3-1 is slidably connected inside the locking cylinder 3-2. A push column 3-3 is fixedly connected to the side wall of the locking pin 3-1, and the push column 3-3 matches the sliding groove. When the operation stops, the pneumatic brake 5 locks the cable winding drum. Then, the push column 3-3 is manually pushed, causing the locking pin 3-1 to extend out from the locking cylinder 3-2. The locking pin 3-1 is inserted into the locking hole on the side of the cable winding drum 4 and the limiting hole of the column of the main frame 1.

[0030] The working principle of the constant force device for lowering and retrieving the underwater BOP umbilical cable of the present invention is as follows: In use, the transition rod 1-1 and connecting rod 1-4 are disassembled, and then the cable winding roller 4 is inserted into the main frame 1 from the side. The transition rod 1-1 and connecting rod 1-4 are then re-fixed. According to the size of the cable winding roller 4, the height of the arc-shaped connecting plate 1-2 and the angle of the cable laying assembly 11 are adjusted. The remote control box 8 or the operating table 9 controls the rotation of the pneumatic motor 7 through the pneumatic control system 6. The sprocket on the output shaft of the pneumatic motor 7 drives the chain 10 and the sprocket ring 13 to rotate, thereby driving the cable winding roller 4 to rotate, realizing the retrieval and lowering of the umbilical cable 12. At the same time, the chain 10 drives the drive sprocket 11-2 to rotate, thereby driving the drive shaft 11-4 to rotate. The umbilical cable 12 passes between the cable laying roller 11-3 and the drive shaft 11-4 to perform the cable laying operation. After the operation is completed, activate the pneumatic brake 5 to lock the cable winding drum 4. Then, manually push the push column 3-3 to drive the locking pin 3-1 out of the locking cylinder 3-2. The locking pin 3-1 is inserted into the card hole on the side of the cable winding drum 4 and the limiting hole of the column of the main frame 1.

[0031] The present invention provides a constant force device for lowering and retrieving underwater BOP umbilical cables. The cable guide does not adjust according to the change of the umbilical cable entry angle. At the same time, it solves the problem that the multi-path cable lowering and retrieval device for blowout preventers can only be used on a single drilling platform.

Claims

1. A constant force device for lowering and retrieving underwater BOP umbilical cables, characterized in that, The system includes a main frame (1), the top of which is connected by bolts to a transition rod (1-1) and a connecting rod (1-4) arranged in parallel. The bottom of the main frame (1) is fixed with two oppositely arranged fixing units, both of which are located inside the main frame (1). A cable assembly (11) is connected between the two fixing units. The cable assembly (11) is connected to a tension adjustment device (2). The tension adjustment device (2) is connected to a cable winding roller (4). The cable winding roller (4) is located directly below the fixing unit. The tension adjustment device (2) is also connected to a pneumatic motor (7). The pneumatic motor (7) is connected to a pneumatic control system (6) via a pipeline. The pneumatic control system (6) is connected to a control system via a wire. The number of tension adjustment devices (2) is set to six, and the six tension adjustment devices are evenly arranged along the circumference of the side of the cable winding drum (4). The tension adjustment device (2) includes two L-shaped connecting plates (2-2) arranged opposite to each other. One side of each L-shaped connecting plate (2-2) is connected to the winding drum (4) by fixing screws (2-8). The other side of the L-shaped connecting plate (2-2) is connected to a fixing plate (2-3). The cross-section of the fixing plate (2-3) is set as an "F" shape. The inner wall of the fixing plate (2-3) is provided with a second adjustment plate (2-5). A sprocket ring (13) is connected inside the fixing plate (2-3). A chain (10) is fixedly connected to the edge of the sprocket ring (13) along its circumference. The chain (10) meshes with the sprocket on the output shaft of the pneumatic motor (7). The chain (10) meshes with the drive sprocket (11-2). A pad (2-1) is also connected between the L-shaped connecting plate (2-2) and the winding drum (4). The inner wall of the fixing plate (2-3) is provided with two wear-resistant plates (2-6) arranged opposite to each other. The wear-resistant plates (2-6) are arranged on both sides of the sprocket ring (13). Fastening screws (2-7) are passed through the side wall of the fixing plate (2-3). The end of the fastening screw (2-7) contacts the wear-resistant plate (2-6). A first adjusting plate (2-4) is also connected between the L-shaped connecting plate (2-2) and the fixing plate (2-3). The bottom of the main frame (1) is connected to a pneumatic brake (5), which is located near the pneumatic motor (7) and is matched with the cable winding drum (4). The bottom of the main frame (1) is also connected to a mechanical locking device (3). The mechanical locking device (3) is located away from the pneumatic motor (7). The mechanical locking device (3) includes a locking cylinder (3-2). The locking cylinder (3-2) is connected to the bottom of the main frame (1). The side wall of the locking cylinder (3-2) is provided with a sliding groove along its length. A locking pin (3-1) is slidably connected inside the locking cylinder (3-2). A push post (3-3) is fixedly connected to the side wall of the locking pin (3-1). The push post (3-3) matches the sliding groove.

2. The constant force device for lowering and retrieving underwater BOP umbilical cable according to claim 1, characterized in that, The fixing unit includes two opposing support rods (1-3), which are respectively fixed to the bottom of the crossbar at the top of the main frame (1). An arc-shaped connecting plate (1-2) is connected between the two support rods (1-3) by adjusting screws (1-5). The cable winding roller (4) is located directly below the two arc-shaped connecting plates (1-2). The surface of the arc-shaped connecting plate (1-2) is evenly provided with several connecting holes (1-6) along its circumference. The two arc-shaped connecting plates (1-2) are connected to the cable assembly (11).

3. The constant force device for lowering and retrieving the underwater BOP umbilical cable according to claim 2, characterized in that, The support rod (1-3) has several adjustment screw holes along its length.

4. The constant force device for lowering and retrieving underwater BOP umbilical cable according to claim 1, characterized in that, The cable assembly (11) includes two oppositely arranged connecting plates (11-1), a drive shaft (11-4) is passed between the two connecting plates (11-1), one end of the drive shaft (11-4) is connected to a drive sprocket (11-2), two side-by-side cable rollers (11-3) are connected between the two connecting plates (11-1), the two cable rollers (11-3) are respectively arranged on both sides of the drive shaft (11-4), and the drive sprocket (11-2) is connected to the tension adjustment device (2).

5. The constant force device for lowering and retrieving the underwater BOP umbilical cable according to claim 4, characterized in that, The connecting plate (11-1) has three pairs of holes (11-5) evenly distributed around its circumference. The three pairs of holes (11-5) are arranged opposite to the three connecting holes (1-6) adjacent to the arc-shaped connecting plate (1-2).

Images