Petroleum drilling rig blowout preventer hoisting and moving system

Abstract

The application discloses a petroleum drilling rig blowout preventer hoisting and moving system, which comprises a lower base installed on a guide rail, wherein the lower base is connected with a ratchet claw assembly through a longitudinal walking hydraulic cylinder; an upper base is installed above the lower base; two transverse translation hydraulic cylinders are installed between the upper base and the lower base; the front end of the upper base is hinged with the bottom of a stand; a lower supporting arm, an upper supporting arm and a lifting system are installed on the stand; a lifting bar is installed on the upper supporting arm; and an inclined supporting rod is hinged between the stand and the upper base. The blowout preventer group is supported by the upper supporting arm and the lower supporting arm, the height of the blowout preventer group is adjusted by the lifting system, the relative position of the blowout preventer group is adjusted by the longitudinal walking hydraulic cylinder and the transverse translation hydraulic cylinder, the blowout preventer group is aligned with the wellhead position, the bolt hole of the blowout preventer group is aligned with the flange mounting hole of the wellhead by the rotating hydraulic cylinder, the blowout preventer group is lifted and hoisted in the limited space, the degree of automation is high, and the reliability is high.

Description

Technical Field

[0001] This invention relates to the field of oil drilling and production equipment technology, specifically to a system for hoisting and moving a blowout preventer (BOP) for an oil drilling rig. Background Technology

[0002] Blowout preventers (BOPs) are wellhead safety devices commonly used in oil drilling to prevent blowouts. BOP assemblies typically consist of a combination of annular BOPs, single-gate BOPs, double-gate BOPs, and four-way connectors, resulting in a large volume. Conventional BOP assembly installation is accomplished using a BOP hoisting device mounted on a lifting beam below the drilling rig's base. Due to limitations in clearance and operating space below the drilling platform, installation and disassembly are inconvenient. Moving the BOP requires on-site workers to assist in righting it, posing significant operational risks and poor safety. Furthermore, when installing casing heads at the wellhead, existing BOP hoisting devices cannot simultaneously move the BOP assembly and casing head, requiring the drilling rig's lifting system to complete the casing head installation, which is complex and inefficient. Summary of the Invention

[0003] The purpose of this invention is to provide a system for hoisting and moving blowout preventers (BOPs) on oil drilling rigs, so as to solve the problem that existing BOP hoisting and moving devices are limited by operating space and are inconvenient to install and disassemble.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] A lifting and moving system for a blowout preventer (BOP) of an oil drilling rig includes a lower base mounted on a guide rail. The front end of the lower base is connected to a pawl assembly via a longitudinal travel cylinder. An upper base is mounted on the rear upper part of the lower base. Two parallel transverse translation cylinders are installed between the upper and lower bases. The front end of the upper base is hinged to the bottom of a column via a connecting lug. The column has a U-shaped frame structure. A lower support arm is mounted on the lower part of the column, and an upper support arm is mounted on the upper part of the column. A lifting bar is mounted on the upper support arm. The upper support arm is connected to the lower crossbeam of the column via a lifting system. The two ends of the upper crossbeam of the column are hinged to the tops of two parallel diagonal support rods, and the bottoms of the diagonal support rods are hinged to the rear ends of the upper base.

[0006] Preferably, the lifting system includes a single lifting cylinder located between the two vertical beams of the column, the cylinder seat trunnion end of the single lifting cylinder is mounted on the main frame of the upper support arm, and the piston end of the single lifting cylinder is fixed to the middle of the lower crossbeam of the column.

[0007] Preferably, the lifting system comprises a lifting seat, the middle part of the lifting seat is connected with the trunnion seat of the lower lifting cylinder, the piston end of the lower lifting cylinder is fixed on the middle part of the lower cross beam of the column through a pin shaft, the cylinder body of the lower lifting cylinder penetrates through the lifting seat, two upper lifting cylinders which are parallel to each other are arranged on both sides of the cylinder body of the lower lifting cylinder, the piston end of the upper lifting cylinder is fixed on the upper surface of the lifting seat, and the middle part of the cylinder body of the upper lifting cylinder is installed on the main frame of the upper supporting arm through a connecting plate.

[0008] Preferably, the upper supporting arm comprises a mouth-shaped main frame, a rotary plate mounting seat is welded on the front side wall of the upper cross beam of the main frame, a semicircular notch which is matched with the shape of the rotary plate is formed in the front part of the rotary plate mounting seat, a plurality of limiting guide shafts are installed on the rotary plate mounting seat, an arc-shaped rotary plate is installed on the upper part of the rotary plate mounting seat, the limiting guide shafts are embedded in a plurality of limiting guide holes formed in the rotary plate, the both ends of the rotary plate are connected with the piston end of the rotary cylinder through rotary ear plates welded on the outer edge of the rotary plate, and the cylinder seat of the rotary cylinder is hinged on the both sides of the upper cross beam of the main frame through ear plates; the front end of the rotary cylinder mounting seat is connected with the both ends of the upper protective support through ear plate pin shafts, and the inner wall of the upper protective support is arc-shaped.

[0009] Preferably, the both ends of the rear part of the upper cross beam of the main frame are provided with slide rail mounting seats which are clamped on the column guide rails fixed on the outer side walls of the two vertical beams of the column; the rear side wall of the lower cross beam of the main frame is provided with a lifting cylinder trunnion seat, and the cylinder body of the single lifting cylinder or the upper lifting cylinder is installed on the lifting cylinder trunnion seat.

[0010] Preferably, the side end of the upper cross beam of the main frame is hinged with the rear end of the grab pole lifting arm through a pin shaft ear plate, the grab pole lifting arm is located outside the rotary plate, the rear part of the grab pole lifting arm is a horizontal straight rod, the front part of the grab pole lifting arm is bent towards the guide rail, the front end of the grab pole lifting arm is provided with a lifting ear plate, the lifting ear plate is connected with the hoist, and the bottom of the hoist is provided with a sleeve head.

[0011] Preferably, the inclined supporting rod comprises an upper supporting rod and a lower supporting rod, a matched connecting ear plate is welded on the upper part and the lower part of the side wall of the connecting part of the upper supporting rod and the lower supporting rod, the two groups of connecting ear plates are hinged through connecting pin shafts, the connecting pin shaft of the upper part of the side wall of the upper supporting rod is removed in the transportation process, and the upper supporting rod is folded and arranged after being rotated by 180° around the connecting pin shaft of the lower part of the side wall of the upper supporting rod.

[0012] Preferably, the lower supporting arm comprises a support frame connected with the column at the rear end part, the front part of the support frame is arc-shaped, the front end of the support frame is connected with the both ends of the lower protective support through ear plate pin shafts, and the inner wall of the lower protective support is arc-shaped.

[0013] Preferably, a plurality of horizontal pull beams which are perpendicular to the guide rail are welded on the guide rail.

[0014] Preferably, the hanger includes a cross-shaped welded beam, and a lifting lug is arranged at the bottom of the welded beam.

[0015] The foldable inclined support rod in the application can be replaced by a telescopic hydraulic cylinder, when the stand is laid down to be horizontal, the piston rod of the telescopic hydraulic cylinder is retracted, and the cylinder body is rotated to be horizontal, thereby ensuring low-position transportation and low-position blowout preventer assembly operation.

[0016] The use method of the application is as follows:

[0017] Method one: whole blowout preventer group is moved and installed

[0018] Firstly, the operator installs the lower base and the upper base on the guide rail in sequence, the stand is in a horizontal laid-down state, the upper support rod and the lower support rod of the inclined support rod are folded and placed, and the operator fixes the blowout preventer group to the upper supporting arm and the lower supporting arm in a horizontal laid-down state; secondly, the blowout preventer group and the stand are pulled up by the crane, so that the stand is in a vertical state, in the process, the inclined support rod is rotated from the folded state to the inclined state, and the connecting pin shaft of the upper support rod and the lower support rod is fixed; thirdly, the piston rod of the longitudinal walking hydraulic cylinder is controlled to extend, so that the pawl assembly grabs the lower part of the blowout preventer group, and the blowout preventer group is transported to the center position of the wellhead; the height of the blowout preventer group is adjusted by controlling the lifting system; the piston rod of the transverse translation hydraulic cylinder is controlled to extend and retract, so that the position between the upper base and the lower base is adjusted, so that the blowout preventer group is coaxial with the casing head installed at the center of the wellhead; finally, the piston rod of the rotating hydraulic cylinder is controlled to extend and retract, so that the angle of the blowout preventer group is adjusted, so that the bolt holes of the blowout preventer group are aligned with the flange bolt holes of the wellhead, and the blowout preventer group is installed on the casing head.

[0019] Method two: each component of the blowout preventer group is moved and installed at the wellhead

[0020] Firstly, the operator installs the lower base and the upper base on the guide rail in sequence, the stand is in a horizontal laid-down state, the upper support rod and the lower support rod of the inclined support rod are folded and placed, the stand is pulled up by the crane, so that the stand is in a vertical state, in the process, the inclined support rod is rotated from the folded state to the inclined state, and the connecting pin shaft of the upper support rod and the lower support rod is fixed; secondly, the hanger is placed above the upper supporting arm, and the blowout preventer assembly is connected to the hanger through the buckle, lifting belt or iron chain; thirdly, the piston rod of the longitudinal walking hydraulic cylinder is controlled to extend, so that the pawl assembly grabs the lower part of the blowout preventer group, and the blowout preventer assembly is transported to the center position of the wellhead; the height of the blowout preventer group is adjusted by controlling the lifting system; the piston rod of the transverse translation hydraulic cylinder is controlled to extend and retract, so that the position between the upper base and the lower base is adjusted, so that the blowout preventer assembly is coaxial with the casing head installed at the center of the wellhead; finally, the piston rod of the rotating hydraulic cylinder is controlled to extend and retract, so that the angle of the blowout preventer group is adjusted, so that the bolt holes of the blowout preventer group are aligned with the flange bolt holes of the wellhead, and the blowout preventer assembly is installed on the casing head.

[0021] The present application can move the casing head while hoisting the blowout preventer set:

[0022] The first step, the casing head is hoisted to the casing head platform on the lower base by the crane, and the casing head is hoisted to the front end of the pole arm by the hoist, and when the blowout preventer set is hoisted to the wellhead position, the casing head is moved to the wellhead center along with the blowout preventer set;

[0023] The second step, the operator controls the lifting system to lift the blowout preventer set and retreat from the wellhead position, and at the same time, the operator controls the hoist to move the casing head to the wellhead center and install the casing head;

[0024] The third step, the operator rotates the pole arm to leave the wellhead center position, controls the lifting system to lower the blowout preventer set to the wellhead, and installs the blowout preventer set.

[0025] The beneficial effects of the present application are:

[0026] (1) The present application supports the blowout preventer set through the upper supporting arm and the lower supporting arm installed on the stand, adjusts the height of the blowout preventer set through the lifting system, adjusts the relative position of the blowout preventer set through the longitudinal walking hydraulic cylinder and the transverse translation hydraulic cylinder, aligns the blowout preventer set with the wellhead position, adjusts the bolt hole of the blowout preventer set with the flange mounting hole of the wellhead through the rotating hydraulic cylinder, realizes the lifting and hoisting of the blowout preventer set in a limited space, has high automation degree and strong reliability;

[0027] (2) The bottom of the stand is hinged to the upper base in the present application, the stand can be placed horizontally by rotating, the inclined support rod connected with the stand can also be folded into two parts, which is convenient for the operator to install the blowout preventer set at a low position and transport at a low position, has high safety performance and convenient transportation;

[0028] (3) One side of the upper supporting arm in the present application is provided with a pole arm for hoisting the casing head, which realizes the hoisting of the casing head while the blowout preventer set is hoisted in the present application, saves the working time and improves the working efficiency;

[0029] (4) The lower base and the upper base are installed above the guide rail in the present application, and the stand, the upper supporting arm and the lower supporting arm are all installed on the guide rail, so that the present application has low requirement for the foundation during use and can be applied to various working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic view of the present application;

[0031] Figure 2 is Figure 1 a structural schematic view of the guide rail in the present application;

[0032] Figure 3The structure schematic diagram of the lifting system when the lifting system includes the single lifting cylinder;

[0033] Figure 4 The structure schematic diagram of the lifting system when the lifting system includes the upper lifting cylinder and the lower lifting cylinder;

[0034] Figure 5 The structure schematic diagram of the lifting system when the lifting system includes the upper lifting cylinder and the lower lifting cylinder; Figure 4 The structure schematic diagram of the lifting system when the lifting system includes the upper lifting cylinder and the lower lifting cylinder;

[0035] Figure 7 The structure schematic diagram of the lifting system when the lifting system includes the upper lifting cylinder and the lower lifting cylinder; Figure 1 The structure schematic diagram of the lifting system when the lifting system includes the upper lifting cylinder and the lower lifting cylinder;

[0036] Figure 8 The structure schematic diagram of the lifting system when the lifting system includes the upper lifting cylinder and the lower lifting cylinder; Figure 1 The structure schematic diagram of the lifting system when the lifting system includes the upper lifting cylinder and the lower lifting cylinder;

[0037] Figure 9 The schematic diagram of hoisting the double-plate blowout preventer by using the lifting bar of the present application;

[0038] Figure 6 The schematic diagram of the present application in the low position folding state for transportation;

[0039] Figure 10 The schematic diagram of the present application in the low position folding state for transportation of the blowout preventer group;

[0040] Figure 11 The use state diagram of the present application for transportation of the blowout preventer group and the casing head;

[0041] Figure 12 The structure schematic diagram of the present application when the inclined support rod is the telescopic cylinder;

[0042] In the drawing: 1, guide rail, 2, ratchet claw assembly, 3, lower base, 4, upper base, 5, stand column, 6, inclined support rod, 601, upper support rod, 602, lower support rod, 7, lower supporting arm, 8, upper supporting arm, 801, main frame, 802, upper protection support, 803, rotating plate, 804, limiting guide hole, 805, digging rod lifting arm, 806, slide rail mounting seat, 807, lifting cylinder trunnion seat, 808, rotating plate mounting seat, 9, lifting bar, 10, operation valve table, 11, longitudinal walking cylinder, 12, transverse translation cylinder, 13, lifting system, 1301, lower lifting cylinder, 1302, upper lifting cylinder, 1303, lifting seat, 14, rotating cylinder, 15, blowout preventer group, 16, transverse beam, 17, casing head, 18, hoisting pulley, 19, stand column guide rail, 20, single lifting cylinder. DETAILED DESCRIPTION

[0043] As Figure 1The system is shown in one of the blowout preventer hoisting and moving system of the oil drilling rig, including the installation on the guide rail 1 on the lower base 3, the front end of the lower base 3 is connected with the pawl assembly 2 through the longitudinal walking liquid cylinder 11, the upper rear of the lower base 3 is installed with the upper base 4, the upper base 4 and the lower base 3 are installed with two mutually parallel transverse translation liquid cylinders 12, the front end of the upper base 4 is hinged with the bottom of the column 5 through the connecting lug plate, the column 5 is the mouth-shaped frame structure, the lower part of the column 5 is installed with the lower supporting arm 7, the upper part of the column 5 is installed with the upper supporting arm 8, the upper supporting arm 8 is installed with the hoisting bar 9, the upper supporting arm 8 is connected with the lower crossbeam of the column 5 through the lifting system 13, the upper crossbeam of the column 5 is hinged with the top of the two mutually parallel inclined support rods 6 at both ends, the bottom of the inclined support rod 6 is hinged on both sides of the rear end of the upper base 4.

[0044] As shown in the figure, Figure 3 The lifting system 13 includes a single lifting cylinder 20 between the two vertical beams of the column 5, the cylinder seat trunnion end of the single lifting cylinder 20 is installed on the main frame 801 of the upper supporting arm 8, and the piston end of the single lifting cylinder 20 is fixed in the middle of the lower crossbeam of the column 5.

[0045] As shown in the figure, Figure 4 , Figure 5 Another structure of the lifting system 13 is shown in the figure: the lifting system 13 includes a lifting seat 1303, the middle of the lifting seat 1303 is connected with the trunnion seat of the lower lifting cylinder 1301, the piston end of the lower lifting cylinder 1301 is fixed in the middle of the lower crossbeam of the column 5 through the pin shaft, the cylinder body of the lower lifting cylinder 1301 penetrates the lifting seat 1303, two mutually parallel upper lifting cylinders 1302 are arranged on both sides of the cylinder body of the lower lifting cylinder 1301, the piston end of the upper lifting cylinder 1302 is fixed on the upper surface of the lifting seat 1303, and the cylinder body of the upper lifting cylinder 1302 is installed on the main frame 801 of the upper supporting arm 8 through the connecting plate.

[0046] As shown in the figure, Figure 6 The upper supporting arm 8 includes a main frame 801 in the shape of a mouth, a rotating plate mounting seat 808 is welded on the front side wall of the upper crossbeam of the main frame 801, a semicircular notch with a shape matched with the rotating plate 803 is formed in the front part of the rotating plate mounting seat 808, a plurality of limiting guide shafts are installed on the rotating plate mounting seat 808, a circular arc-shaped rotating plate 803 is installed on the upper part of the rotating plate mounting seat 808, the limiting guide shafts are embedded in a plurality of limiting guide holes 804 formed in the rotating plate 803, the two ends of the rotating plate 803 are connected with the piston ends of the rotating cylinders 14 through the rotating lug plates welded on the outer edges of the rotating plate 803, and the cylinder seats of the rotating cylinders 14 are hinged on both sides of the upper crossbeam of the main frame 801 through the lug plates; the front end of the rotating cylinder mounting seat 808 is connected with the two ends of the upper protective support 802 through the lug pin shafts, and the inner wall of the upper protective support 802 is in the shape of a circular arc.

[0047] The upper beam rear end of the main frame 801 is provided with a slide rail mounting seat 806 clamped on the column guide rail 19 fixed to the outer side wall of the two vertical beams of the column 5; the rear side wall of the lower beam of the main frame 801 is provided with a lifting cylinder trunnion seat 807, and the cylinder body of the single lifting cylinder 20 or the upper lifting cylinder 1302 is mounted on the lifting cylinder trunnion seat 807.

[0048] The side end of the upper beam of the main frame 801 is hinged to the rear end of the shoveling arm 805 through a pin shaft ear plate, the shoveling arm 805 is located outside the rotating plate 803, the rear part is a horizontal straight rod, and the front part is bent towards the guide rail 1; the front end of the shoveling arm 805 is provided with a hoisting ear plate connected with the hoisting cage 18, and the bottom of the hoisting cage 18 is provided with a sleeve head 17.

[0049] As shown in Figure 9 , the inclined support rod 6 includes an upper support rod 601 and a lower support rod 602, and the side wall upper part and the side wall lower part of the connection part of the upper support rod 601 and the lower support rod 602 are both welded with a matched connecting ear plate, and the two groups of connecting ear plates are hinged through a connecting pin shaft; the connecting pin shaft of the side wall upper part of the upper support rod 601 is removed in the transportation process, and the upper support rod 601 is rotated by 180° around the connecting pin shaft of the side wall lower part of the upper support rod 601 and then folded with the lower support rod.

[0050] As shown in Figure 1 , the lower supporting arm 7 includes a support frame connected with the column 5 at the rear end, the front part of the support frame is arc-shaped, the front end of the support frame is connected with the two ends of the lower protective support through an ear plate pin shaft, and the inner wall of the lower protective support is arc-shaped.

[0051] As shown in Figure 2 , a plurality of horizontal pull beams 16 perpendicular to the guide rail 1 are welded on the guide rail 1.

[0052] As shown in Figure 7 , the lifting bar 9 includes a cross-shaped welded beam, and the bottom of the welded beam is provided with a hoisting ear plate.

[0053] As shown in Figure 12 , the foldable inclined support rod in the application can be replaced by a telescopic cylinder.

[0054] The use method of the application is as follows:

[0055] As shown in Figure 9 , Figure 10 , the blowout preventer group is integrally moved and installed

[0056] Firstly, the operator installs the lower base 3 and the upper base 4 on the guide rail 1 in sequence, the stand 5 is in a horizontal state of being laid down, the upper support rod 601 and the lower support rod 602 of the inclined support rod 6 are folded and placed, the operator horizontally lays down and fixes the blowout preventer set 15 on the upper supporting arm 8 and the lower supporting arm 7; secondly, the blowout preventer set 15 and the stand 5 are pulled up by means of a crane, so that the stand 5 is in a vertical state, in the process, the inclined support rod 6 is rotated from the folded state to the inclined state, and the connecting pin shaft of the upper support rod 601 and the lower support rod 602 is fixed; thirdly, the piston rod of the longitudinal walking hydraulic cylinder 11 is controlled to extend, so that the pawl assembly 2 grabs the lower part of the blowout preventer set 15, and the blowout preventer set 15 is transported to the center position of the wellhead; the height of the blowout preventer set 15 is adjusted by controlling the lifting system 13; the piston rod of the transverse translation hydraulic cylinder 12 is controlled to extend and retract, so that the position between the upper base 4 and the lower base 3 is adjusted, so that the blowout preventer set 15 is coaxial with the casing head 17 installed at the center of the wellhead; finally, the piston rod of the rotating hydraulic cylinder 14 is controlled to extend and retract, so that the rotating plate 803 is rotated, the angle of the blowout preventer set 15 is adjusted, the bolt hole of the blowout preventer set 15 is aligned with the flange bolt hole of the wellhead, and the blowout preventer set 15 is installed on the casing head 17.

[0057] As shown in Figure 8 the blowout preventer set is assembled at the wellhead after being transported individually

[0058] Firstly, the operator installs the lower base 3 and the upper base 4 on the guide rail 1 in sequence, the stand 5 is in a horizontal state of being laid down, the upper support rod 601 and the lower support rod 602 of the inclined support rod 6 are folded and placed, the operator horizontally lays down and fixes the blowout preventer set 15 on the upper supporting arm 8 and the lower supporting arm 7; secondly, the blowout preventer set 15 and the stand 5 are pulled up by means of a crane, so that the stand 5 is in a vertical state, in the process, the inclined support rod 6 is rotated from the folded state to the inclined state, and the connecting pin shaft of the upper support rod 601 and the lower support rod 602 is fixed; thirdly, the piston rod of the longitudinal walking hydraulic cylinder 11 is controlled to extend, so that the pawl assembly 2 grabs the lower part of the blowout preventer set 15, and the blowout preventer set 15 is transported to the center position of the wellhead; the height of the blowout preventer set 15 is adjusted by controlling the lifting system 13; the piston rod of the transverse translation hydraulic cylinder 12 is controlled to extend and retract, so that the position between the upper base 4 and the lower base 3 is adjusted, so that the blowout preventer set 15 is coaxial with the casing head 17 installed at the center of the wellhead; finally, the piston rod of the rotating hydraulic cylinder 14 is controlled to extend and retract, so that the rotating plate 803 is rotated, the angle of the blowout preventer set 15 is adjusted, the bolt hole of the blowout preventer set 15 is aligned with the flange bolt hole of the wellhead, and the blowout preventer set 15 is installed on the casing head 17.

[0059] The blowout preventer set and the casing head can be transported simultaneously in the present application:

[0060] The first step is that the casing head 17 is hoisted to the casing head platform of the lower base 3 by the crane, and the casing head 17 is hoisted to the front end of the grab arm 805 by the hoist 18, and when the blowout preventer set 15 is hoisted to the wellhead position, the casing head 17 is moved to the vicinity of the wellhead center along with the blowout preventer set 15;

[0061] The second step is that the blowout preventer set 15 is lifted by the lifting system 13, and the casing head 17 is moved to the wellhead center by the hoist 18, and the casing head 17 is installed.

[0062] The third step is that the blowout preventer set 17 is lowered to the wellhead by the lifting system 13, and the blowout preventer set 17 is installed.

[0063] The present application supports the blowout preventer set by the upper supporting arm and the lower supporting arm installed on the stand, adjusts the height of the blowout preventer set by the lifting system, adjusts the relative position of the blowout preventer set by the longitudinal walking hydraulic cylinder and the transverse translation hydraulic cylinder, aligns the blowout preventer set to the wellhead position, adjusts the bolt hole of the blowout preventer set to align with the flange mounting hole of the wellhead by the rotating hydraulic cylinder, realizes the lifting and hoisting of the blowout preventer set in a limited space, and has high automation degree and strong reliability.

Claims

1. A blowout preventer hoisting and transport system for a petroleum drilling rig, the system comprising: The utility model provides a kind of lifting device, including the lower base (3) installed on guide rail (1), the front end of lower base (3) is connected with pawl assembly (2) by longitudinal walking liquid cylinder (11), upper base (4) is installed in the rear upper of lower base (3), two mutually parallel transverse translation liquid cylinders (12) are installed between upper base (4) and lower base (3), the front end of upper base (4) is hinged with the bottom of stand (5) by connecting lug plate, stand (5) is mouth-shaped frame structure, lower supporting arm (7) is installed in the lower part of stand (5), upper supporting arm (8) is installed in the upper part of stand (5), hoisting bar (9) is installed on upper supporting arm (8), upper supporting arm (8) is connected with the lower crossbeam of stand (5) by lifting system (13), the top of two mutually parallel inclined support rods (6) is hinged respectively with the both ends of upper crossbeam of stand (5), the bottom is hinged in the rear end of both sides of upper base (4) in inclined support rod (6). The lifting system (13) includes lifting seat (1303), the middle part of lifting seat (1303) is connected with the trunnion seat of lower lifting cylinder (1301), the piston end of lower lifting cylinder (1301) is fixed in the middle part of the lower crossbeam of stand (5) by pin shaft, the cylinder body of lower lifting cylinder (1301) penetrates lifting seat (1303), two mutually parallel upper lifting cylinders (1302) are arranged on the both sides of the cylinder body of lower lifting cylinder (1301), the piston end of upper lifting cylinder (1302) is fixed on the upper surface of lifting seat (1303), the cylinder body of upper lifting cylinder (1302) is installed on the main frame (801) of upper supporting arm (8) by connecting plate.

2. The blowout preventer hoisting and transport system for a petroleum drilling rig of claim 1, wherein: The upper supporting arm (8) includes the main frame (801) of mouth shape, the front side wall of the upper crossbeam of main frame (801) is welded with rotary plate mounting seat (808), the front part of rotary plate mounting seat (808) is provided with semicircular arc-shaped notch that is matched with the shape of rotary plate (803), a plurality of limiting guide shafts are installed on rotary plate mounting seat (808), arc-shaped rotary plate (803) is installed on the upper part of rotary plate mounting seat (808), the limiting guide shafts are embedded in a plurality of limiting guide holes (804) formed in rotary plate (803), the both ends of rotary plate (803) are connected with the piston end of rotary cylinder (14) by rotary lug plate welded on the outer edge of rotary plate (803), the cylinder seat of rotary cylinder (14) is hinged on the both sides of the upper crossbeam of main frame (801) by lug plate, the front end of rotary cylinder mounting seat (808) is connected with the both ends of upper protection support (802) by lug pin shaft, the inner wall of upper protection support (802) is arc-shaped.

3. The blowout preventer hoisting and transport system of claim 1 or 2, wherein: The both ends of the rear part of the upper crossbeam of main frame (801) are provided with slide rail mounting seat (806), and the slide rail mounting seat (806) is clamped on the stand guide rail (19) fixed to the outer side wall of the two vertical beams of stand (5); the rear side wall of the lower crossbeam of main frame (801) is provided with lifting cylinder trunnion seat (807), and the cylinder body of upper lifting cylinder (1302) is installed on lifting cylinder trunnion seat (807).

4. The blowout preventer hoisting and transport system of claim 3, wherein: The upper beam side end of the main frame (801) is hinged with the rear end of the grab arm (805) through a pin shaft ear plate, the grab arm (805) is located outside the rotating plate (803), the rear part is a horizontal straight rod, the front part is bent towards the guide rail (1), the front end of the grab arm (805) is provided with a lifting ear plate, the lifting ear plate is connected with the hoist (18), and the bottom of the hoist (18) is provided with a sleeve head (17).

5. The blowout preventer hoisting and transport system of claim 4, wherein: The inclined support rod (6) comprises an upper support rod (601) and a lower support rod (602), the side wall upper part and the side wall lower part of the connecting part of the upper support rod (601) and the lower support rod (602) are both welded with matched connecting ear plates, the two groups of connecting ear plates are hinged through connecting pin shafts, the connecting pin shaft of the side wall upper part of the upper support rod (601) is removed in the transportation process, the upper support rod (601) is rotated by 180 degrees around the connecting pin shaft of the side wall lower part of the upper support rod (601), and then is folded and arranged with the lower support rod.

6. The blowout preventer hoisting and transport system of claim 5, wherein: The lower supporting arm (7) comprises a support frame connected with the stand (5) at the rear end, the front part of the support frame is arc-shaped, the front end of the support frame is connected with the two ends of the lower protection support through an ear plate pin shaft, and the inner wall of the lower protection support is arc-shaped.

7. The blowout preventer hoisting and transport system of claim 6, wherein: A plurality of horizontal pull beams (16) perpendicular to the guide rail (1) are welded on the guide rail (1).

8. The blowout preventer hoisting and transport system of claim 7, wherein: The lifting rod (9) comprises a cross-shaped welded beam, and the bottom of the welded beam is provided with a lifting ear plate.

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