A blowout preventer assembly wellhead installation device

Abstract

This invention discloses a wellhead installation device for a blowout preventer (BOP) assembly, comprising a transport frame with several traveling devices installed on both sides. A skid is mounted on the transport frame, and a tilting frame is hinged to either end of the skid via a pin. Tilting cylinders are installed on both sides of the skid, with their main shafts connected to the tilting frame. The tilting cylinders allow the tilting frame to lie flat or stand upright relative to the skid. A lifting frame is mounted on the tilting frame, and the lifting frame is equipped with a clamping seat and a clamp. The clamping seat can hold the annular BOP shoulder of the BOP assembly tightly; the clamp can secure the flange connection between the drilling four-way connector and the single-gate BOP of the BOP assembly. This invention solves the problem of high labor intensity in BOP assembly installation in existing technologies.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of petroleum well control equipment, and relates to a blowout preventer group wellhead installation device. BACKGROUND

[0002] The blowout preventer group is important equipment for effectively controlling the pressure of an oil and gas well and ensuring safe production. The blowout preventer group can be formed by stacking annular blowout preventers, double-gate blowout preventers, single-gate blowout preventers and four-ways in height. The installation of the blowout preventer group is achieved by using a blowout preventer hoisting and moving device under the drilling platform to connect the blowout preventer group from bottom to top. After the connection is completed, the blowout preventer group is subjected to overall pressure test. The blowout preventer group is provided with a special transportation frame during transportation. The blowout preventer group is difficult to install in alignment, the labor intensity of the operating personnel is high, the safety is poor and the efficiency is low. The blowout preventer group is inconvenient to work when subjected to wellhead pressure test due to the height and space limitation of the drilling platform. SUMMARY

[0003] The present application aims to provide a blowout preventer group wellhead installation device to solve the problem of high labor intensity in the prior art.

[0004] The technical scheme adopted by the present application is a blowout preventer group wellhead installation device, which comprises a moving and transporting frame, a plurality of walking devices are installed on the two sides of the moving and transporting frame, a pry seat is arranged on the moving and transporting frame, a turnover frame is hingedly connected to any end of the pry seat through a pin shaft, a turnover hydraulic cylinder is installed on the two sides of the pry seat, a main shaft of the turnover hydraulic cylinder is connected to the turnover frame, the turnover hydraulic cylinder can make the turnover frame lie down or stand up relative to the pry seat, a hoisting frame is arranged on the turnover frame, the hoisting frame is provided with a clamping seat and a clamp, the clamping seat can tightly hold a shoulder of an annular blowout preventer of the blowout preventer group, and the clamp can tightly hold a flange connection between a drilling four-way and a single-gate blowout preventer of the blowout preventer group.

[0005] The present application has the following characteristics:

[0006] The walking device comprises a hydraulic motor, the hydraulic motor is fixedly connected to the moving and transporting frame, a driving wheel is fixedly connected to a main shaft of the hydraulic motor, a driven wheel is engaged on the two sides of the driving wheel, a pulley is fixedly connected to the driven wheel, the driven wheel is installed on the moving and transporting frame, two moving and transporting rails are arranged below the moving and transporting frame, and the two moving and transporting rails are opposite to the pulleys on the two sides of the moving and transporting frame.

[0007] A plurality of horizontal moving hydraulic cylinders are fixedly connected to any side of the pry seat, a main shaft of the horizontal moving hydraulic cylinder is fixedly connected to the pry seat, and the horizontal moving hydraulic cylinder is fixedly connected to the moving and transporting frame.

[0008] A plurality of rollers are arranged at the bottom of the hoisting frame, a sliding groove is formed in the turnover frame, the sliding groove is opposite to the rollers, the rollers are clamped in the sliding groove, the rollers can roll in the sliding groove, a lifting hydraulic cylinder is fixedly connected to the two sides of the hoisting frame, one end of the lifting hydraulic cylinder is fixedly connected to the turnover frame, and the other end of the lifting hydraulic cylinder is fixedly connected to the hoisting frame.

[0009] The clamping seat comprises a seat body connected to the lifting frame, an arc-shaped recess is formed at the end of the seat body away from the lifting frame, a core I is arranged in the arc-shaped recess, a valve is arranged on the seat body, the valve is arc-shaped, and a core II is arranged on the valve.

[0010] Rotary hydraulic cylinders are mounted on both sides of the seat body, and the main shaft of the rotary hydraulic cylinder is connected to the core I.

[0011] One of the abutting points of the seat body and the valve is hinged by a fixedly installed pin shaft, a connecting rod mechanism is also installed on the other abutting point of the seat body and the valve, the other end of the connecting rod of the connecting rod mechanism is hinged to the lug seat of the valve 18, and a locking device is installed on the other abutting point of the seat body and the valve, and the locking pin shaft in the locking device is inserted into the pin hole of the valve in correspondence.

[0012] The clamp comprises a support connected to the lifting frame, and a clamp is hinged to the support on both sides by a pin shaft, an adjusting lead screw is arranged between the ends of the two clamps away from the support, the adjusting lead screw is hinged to the two clamps by a pin shaft, the adjusting lead screw comprises two sections of bolts, one section of bolt is connected to one clamp, the other section of bolt is connected to the other clamp, and the two sections of bolts are connected by a sleeve.

[0013] The test pressure flange can be connected to the bottom of the blowout preventer group for testing the blowout preventer group.

[0014] The wellhead mounting device for the blowout preventer group has the advantages that the problems of difficult installation and pressure testing, high labor intensity, low work efficiency and poor safety in the prior art are solved, and the overall transportation of the blowout preventer group is met. The blowout preventer is changed from being installed and disassembled piece by piece to being pre-installed integrally on the integrated device, and the installation process is simplified. When the blowout preventer group is installed at the wellhead, the blowout preventer group can be turned over, longitudinally moved, transversely slid, lifted, rotated and the like through the hydraulic operation system, the flange of the blowout preventer group is aligned with the flange of the casing head, the whole process is automated, the installation difficulty and safety risk are reduced. After the wellhead mounting device for the blowout preventer group is adopted, the drilling machine cancels the matching of the conventional BOP hoisting and moving device and the transportation frame, the BOP moving guide rail is no longer matched under the base, the space height utilization rate is higher, and the arrangement of the wellhead mud return pipe and the like is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a perspective structural schematic view of the wellhead mounting device for the blowout preventer group;

[0016] Figure 2 is a front view of the wellhead mounting device for the blowout preventer group;

[0017] Figure 3 is a horizontal structural schematic view of the wellhead mounting device for the blowout preventer group;

[0018] Figure 4 This is a schematic diagram of the clamping seat structure in a blowout preventer assembly wellhead installation device of the present invention;

[0019] Figure 5 This is a schematic diagram of the clamp structure in a blowout preventer assembly wellhead installation device of the present invention;

[0020] Figure 6 This is a schematic diagram of the pressure testing flange structure in a blowout preventer assembly wellhead installation device of the present invention;

[0021] Figure 7 This is a schematic diagram of the traveling device structure in a blowout preventer assembly wellhead installation device of the present invention;

[0022] Figure 8 This is a schematic diagram of the working state of a blowout preventer assembly wellhead installation device according to the present invention.

[0023] In the diagram, 1. Clamping seat, 2. Tilting frame, 3. Lifting frame, 4. Blowout preventer assembly, 5. Clamp, 6. Pressure testing flange, 7. Transfer guide rail, 8. Lifting cylinder, 9. Tilting cylinder, 10. Skid, 11. Transfer frame, 12. Traveling device, 13. Hydraulic control box, 14. Lateral movement cylinder, 15. Seat, 16. Filler core I, 17. Filler core II, 18. Valve, 19. Locking device, 20. Rotary cylinder, 21. Linkage mechanism, 22. Support, 23. Clamp, 24. Adjusting screw, 25. Adjusting wrench, 26. Hydraulic motor, 27. Drive wheel, 28. Driven wheel. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0025] This invention provides a wellhead installation device for blowout preventer (BOP) assembly, such as... Figure 1 , Figure 2 , Figure 3As shown, the system includes a transfer frame 11, with several traveling devices 12 installed on both sides of the transfer frame 11. A skid 10 is mounted on the transfer frame 11, and a tilting frame 2 is hinged to either end of the skid 10 via a pin. Tilting cylinders 9 are mounted on both sides of the skid 10, with their main shafts connected to the tilting frame 2. The tilting cylinders 9 allow the tilting frame 2 to lie down or stand upright relative to the skid 10. A lifting frame 3 is mounted on the tilting frame 2, with clamping seats 1 and clamps 5 installed. The clamping seats 1 can hold the annular blowout preventer shoulder of the blowout preventer assembly 4 tightly; the clamps 5 can clamp the flange connections of the drilling four-way and the single-gate blowout preventer of the blowout preventer assembly 4. Several transverse moving cylinders 14 are fixedly connected to either side of the skid 10, with their main shafts fixed to the skid 10. The transverse moving cylinders 14 are fixedly connected to the transfer frame 11. The skid can slide on the transfer frame. The bottom of the lifting frame 3 is equipped with several rollers. The tilting frame 2 has grooves that correspond to the rollers, allowing the rollers to rotate within them. Lifting cylinders 8 are fixed to both sides of the lifting frame 3. One end of each lifting cylinder 8 is fixed to the tilting frame 2, and the other end is fixed to the lifting frame 3. The lifting frame 3 moves up and down on the tilting frame 2 by extending and retracting the lifting cylinders 8. Figure 4 As shown, the clamping seat 1 includes a seat body 15, which is connected to the lifting frame 3. An arc-shaped groove is formed at the end of the seat body 15 away from the lifting frame 3, and a filler core I 16 is fitted inside the groove. A valve 18, also arc-shaped, is fitted on the seat body 15, and a filler core II 17 is fitted on the valve 18. When the seat body 15 and the valve 18 are engaged, filler core I 16 and filler core II 17 form a circular filler core. Since different models (pressure and diameter) of blowout preventers have different outer diameters, filler cores I 16 and II 17 of appropriate sizes are selected according to the actual blowout preventer and inserted into the grooves of the seat body 15 and the valve 18, respectively. Rotary hydraulic cylinders 20 are installed on both sides of the seat body 15, and the main shaft of the rotary hydraulic cylinders 20 is connected to the filler core I 16. The extension and retraction of the rotary hydraulic cylinders 20 can rotate the fitted filler core I 16 by a certain angle, thereby driving the entire blowout preventer assembly 4 to rotate. One connection point between the base 15 and the valve 18 is hinged using a fixedly installed pin. A linkage mechanism 21 is also installed at one connection point between the base 15 and the valve 18, with the other end of the linkage 21 hinged to the ear seat of the valve 18. A locking device 19 is installed at the other connection point between the base 15 and the valve 18, with the locking pin in the locking device 19 correspondingly inserted into the pin hole of the valve 18. Figure 5 As shown, the clamp 5 includes a support 22, which is connected to the lifting frame 3. Both sides of the support 22 are hinged with clamps 23 using pins. An adjusting screw 24 is provided between the ends of the two clamps 23 furthest from the support 22. The adjusting screw 24 is hinged to both clamps 23 using pins. The adjusting screw 24 includes two bolt sections; one bolt section connects to one clamp 23, and the other bolt section connects to the other clamp 23. The two bolt sections are connected by a sleeve.Figure 6 As shown, the present invention provides a blowout preventer (BOP) assembly wellhead installation device, which also includes a pressure testing flange 6. The pressure testing flange 6 can be connected to the bottom of the BOP assembly 4 for pressure testing of the BOP assembly 4. The pressure testing flange 6 is a blind flange conforming to API standards, and the blind flange has a blind threaded hole in the middle, similar to that of the drill pipe joint. Figure 7 As shown, the traveling device 12 includes a hydraulic motor 26, which is fixedly connected to the mobile transport frame 11. The main shaft of the hydraulic motor 26 is fixedly connected to a drive wheel 27, and driven wheels 28 mesh on both sides of the drive wheel 27. Pulleys are fixedly connected to the driven wheels 28, which are mounted on the mobile transport frame 11. Two transport guide rails 7 are provided below the mobile transport frame 11, and these two rails are opposite to the pulleys on both sides of the mobile transport frame 11. The transport guide rails 7 are supported on the connecting beam of the base, with some sections supported by outriggers on the ground. The two guide rails are distributed on both sides of the center of the wellhead, avoiding circular (or square) wells. The transport frame 11 and the traveling device 12 are connected by pins. Two sets of traveling devices are installed on each side of the transport frame. The transport trolley composed of the transport frame 11 and the traveling device 12 moves longitudinally on the transport guide rails. The present invention provides a blowout preventer assembly wellhead installation device, which further includes a hydraulic control box 13. The hydraulic control box 13 is connected to a lifting cylinder 8, a tilting cylinder 9, a hydraulic control box 13, a lateral moving cylinder 14, a rotating cylinder 20, and a hydraulic motor 16, and is used to control the operation of the entire hydraulic equipment.

[0026] like Figure 8 As shown, the working process of the blowout preventer assembly wellhead installation device of the present invention is as follows: two transport guide rails 7 are arranged on both sides of the center of the wellhead. The traveling device 12 in the entire transport unit slides along the guide rails. When the entire device is in a horizontal position, the test drill pipe passes through the end of the blowout preventer assembly, and the drill pipe is connected and fixed to the test flange 6 installed at the bottom of the blowout preventer through the bolt hole, and the blowout preventer clamps the drill pipe.

[0027] The tilting cylinder 9 extends, causing the tilting frame 2 to stand upright. The entire device is located outside the wellhead. High-pressure clean water is injected into the blowout preventer assembly 4 using a pressure testing device to complete the blowout preventer assembly pressure test. After the pressure test is completed, the pressure is released, the test drill pipe is pulled out, the test flange 6 is removed, and the clamp 5 is loosened.

[0028] The traveling device 12 moves the entire system to the center of the wellhead. The lifting cylinder 8 lowers the lifting frame 3 and the blowout preventer assembly 4, bringing them closer to the casing head flange. Through the lateral adjustment of the transverse cylinder 14 and the longitudinal adjustment of the traveling device 12, the centers of the blowout preventer connecting flange and the casing head flange are aligned. By rotating the cylinder 20, the blowout preventer assembly 4 is rotated by a certain angle to align the flange connection holes. The connecting bolts of the blowout preventer flange and the casing flange are then manually tightened.

[0029] Locking device 19 loosens the hinged end of the base 15 and valve 18, and linkage mechanism 21 opens valve 18. Traveling device 12 drives the entire device away from the wellhead and to the outside of the base. Tilting cylinder 9 retracts, driving tilting frame 2 and its device to lie down.

[0030] When casing is to be installed or well drilling is completed, and the blowout preventer (BOP) needs to be removed, the tilting cylinder 9 extends, causing the tilting frame 2 to stand upright. The traveling device 12 moves the entire assembly longitudinally to the center of the wellhead. The linkage mechanism 21 opens the valve 18, the clamping seat 1 grips the BOP, the linkage mechanism 21 closes the valve 18, and the locking device 19 locks the valve and the seat. The connecting flange between the BOP and the casing head is removed, and the BOP is moved away from the casing flange by adjusting the lifting cylinder 8. The traveling device 12 moves the entire assembly away from the wellhead. Excluding the transport guide rail 7, the other structures function as a complete transport unit, achieving overall transportation.

[0031] This invention provides a wellhead installation device for blowout preventer (BOP) assemblies, solving the problems of difficult installation and pressure testing, high labor intensity, low work efficiency, and poor safety in existing technologies. It also facilitates the overall transportation of BOP assemblies. The BOP is no longer installed piece by piece or disassembled, but pre-installed as a whole on an integrated device, simplifying the installation process. During wellhead installation, the hydraulic operating system allows the BOP assembly to be flipped, moved longitudinally, slid laterally, lifted, and rotated, achieving alignment between the BOP assembly flange and the casing head flange. The entire process is automated, reducing installation difficulty and safety risks. Using this wellhead installation device, the drilling rig eliminates the need for conventional BOP lifting and transport frames, and the base no longer requires BOP moving guide rails, resulting in higher space utilization and facilitating the arrangement of wellhead mud return pipes, etc.

Claims

1. A stack wellhead installation device for blowout preventers, characterized in that, The utility model provides a movable frame (11) is equipped with a plurality of walking devices (12) on both sides, and the movable frame (11) is provided with a pry seat (10), and the pry seat (10) is hinged with a turnover frame (2) through a pin shaft at either end, and the pry seat (10) is provided with a turnover hydraulic cylinder (9) on both sides, and the main shaft of the turnover hydraulic cylinder (9) is connected with the turnover frame (2), and the turnover hydraulic cylinder (9) can make the turnover frame (2) lie down or stand up relative to the pry seat (10), and the turnover frame (2) is provided with a lifting frame (3), and the lifting frame (3) is installed with a clamping seat (1) and a clamp (5), and the clamping seat (1) can tightly hold the annular blowout preventer shoulder of blowout preventer group (4), and the clamp (5) can tightly hold the flange connection of drilling four-way and single gate blowout preventer of blowout preventer group (4). The walking device (12) comprises a hydraulic motor (26), the hydraulic motor (26) is fixedly connected on the movable frame (11), the main shaft of the hydraulic motor (26) is fixedly connected with a driving wheel (27), the both sides of the driving wheel (27) are engaged with a driven wheel (28), the driven wheel (28) is fixedly connected with a pulley, the driven wheel (28) is installed on the movable frame (11), and the movable frame (11) is provided with two movable guide rails (7) below, and the two movable guide rails (7) are opposite to the pulleys on both sides of the movable frame (11). The pry seat (10) is fixedly connected with a plurality of horizontal movement hydraulic cylinders (14) on either side, the main shaft of the horizontal movement hydraulic cylinder (14) is fixedly connected with the pry seat (10), and the horizontal movement hydraulic cylinder (14) is fixedly connected on the movable frame (11). The bottom of the lifting frame (3) is provided with a plurality of rollers, the turnover frame (2) is provided with a sliding groove, the sliding groove is opposite to the roller, the roller is clamped in the sliding groove, the roller can roll in the sliding groove, and the both sides of the lifting frame (3) are fixedly connected with a lifting hydraulic cylinder (8), one end of the lifting hydraulic cylinder (8) is fixedly connected with the turnover frame (2), and the other end of the lifting hydraulic cylinder (8) is fixedly connected with the lifting frame (3). The clamping seat (1) comprises a seat body (15), the seat body (15) is connected with the lifting frame (3), the one end of the seat body (15) away from the lifting frame (3) is provided with a circular arc groove, the circular arc groove is provided with a core I (16), the seat body (15) is provided with a valve (18), the valve (18) is circular arc, and the valve (18) is provided with a core II (17); The both sides of the seat body (15) are provided with a rotating hydraulic cylinder (20), and the main shaft of the rotating hydraulic cylinder (20) is connected with the core I (16). The clamp (5) comprises a support (22) connected with the lifting frame (3), both sides of the support (22) are hingedly connected with clamps (23) through pin shafts, an adjusting screw (24) is arranged between the ends of the two clamps (23) away from the support (22), the adjusting screw (24) is hingedly connected with the two clamps (23) through pin shafts, the adjusting screw (24) comprises two sections of bolts, one section of bolt is connected with one clamp (23), the other section of bolt is connected with the other clamp (23), and the two sections of bolts are connected through a sleeve.

2. A stack wellhead installation for blowout preventers as claimed in claim 1, characterized in that One abutting point of the seat body (15) and the valve (18) is hingedly connected through a fixedly-installed pin shaft, a connecting rod mechanism (21) is further installed on the one abutting point of the seat body (15) and the valve (18), the other end of the connecting rod of the connecting rod mechanism (21) is hingedly connected with the lug of the valve (18); a locking device (19) is installed on the other abutting point of the seat body (15) and the valve (18), and the locking pin shaft in the locking device (19) is correspondingly inserted into the pin hole of the valve (18).

3. A stack wellhead installation for blowout preventers as defined in claim 1, characterized in that Further comprising a pressure testing flange (6), which can be connected with the bottom of the blowout preventer group (4) and used for pressure testing of the blowout preventer group (4).

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