Blowout prevention and control device

Abstract

The invention relates to the technical field of workover equipment, in particular to a blowout prevention and control device which comprises a vertical shaft, a cross arm, a cross arm lifting driving mechanism, a cock assembly and a cock switch driving mechanism. The cross arm lifting driving mechanism is connected with the cross arm to drive the cross arm to move up and down, and the cock switch driving mechanism is connected with the cock assembly to drive the cock assembly to be opened or closed. The device is reasonable in structure and ingenious in design, through the arrangement of the device, in the cock assembly mounting process, an operator does not need to hold the cock assembly manually to place the cock assembly on a well opening, the cock assembly mounting operation difficulty is greatly reduced, and the cock assembly mounting efficiency is improved. And the situation that an operator is damaged by liquid and gas overflowing from a well in the process of carrying and placing the cock assembly is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of well repair equipment and relates to a blowout prevention and control device. Background Art

[0002] During well repair operations, when a blowout occurs, the wellhead blowout preventer must be closed first, and then the plug valve must be fixedly installed to the wellhead and closed. However, installing the plug valve during a blowout is a very difficult and dangerous task. During installation, the operator needs to hold the plug valve weighing dozens of kilograms and climb to the wellhead. The liquid and gas overflowing from the blowout make it difficult for the operator to open his eyes, so it becomes extremely difficult to hold the plug valve and install it to the wellhead. In addition, the liquid and gas overflowing from the blowout can easily cause damage to the operator. Summary of the Invention

[0003] The present invention provides a blowout prevention and control device, which overcomes the shortcomings of the above-mentioned existing technologies and can effectively solve the problems of great difficulty and high risk in the installation of plug valves during existing blowout operations.

[0004] The technical solution of the present invention is achieved through the following measures: a blowout prevention and control device, including a vertical shaft, a horizontal arm, a horizontal arm lifting drive mechanism, a plug assembly and a plug switch drive mechanism, the vertical shaft is provided with a horizontal arm that can rotate around the vertical shaft and move up and down, the plug assembly is rotatably mounted on the horizontal arm, the horizontal arm lifting drive mechanism is connected to the horizontal arm to drive the horizontal arm to move up and down, and the plug switch drive mechanism is connected to the plug assembly to drive the plug assembly to open or close.

[0005] The following are further optimizations and / or improvements to the above invention: A descending track for guiding the cross arm to first rotate downward and then vertically descend can be fixedly installed at the bottom of the vertical shaft, and the cross arm is slidably arranged on the descending track.

[0006] The above-mentioned descending track may include an arc-shaped plate arranged around the vertical axis, a descending guide surface inclined from top to bottom in a counterclockwise direction is provided on the top of the arc-shaped plate, and a vertically arranged descending guide groove is provided on the arc-shaped plate at the lower position corresponding to the descending guide surface.

[0007] The above-mentioned cross arm may include a first sleeve, a second sleeve, a third sleeve, a first cross bar, a second cross bar, a vertical bar, a mounting ring and a connecting rod. The first sleeve, the second sleeve and the third sleeve are movably sleeved on the vertical shaft from top to bottom. The left end of the first cross bar is fixedly connected to the first sleeve, and the right end of the first cross bar is provided with a mounting ring. The plug assembly is rotatably mounted on the mounting ring. The left end of the second cross bar is fixedly connected to the second sleeve, the lower end of the vertical bar is fixedly connected to the right end of the second cross bar, and the upper end of the vertical bar is fixedly connected to the middle part of the first cross bar. A connecting rod is fixedly connected between the third sleeve and the second cross bar, and a roller sitting on the descending guide surface is installed on the connecting rod. The diameter of the roller is slightly smaller than the width of the descending guide groove.

[0008] A locking position may be provided at the high position of the above-mentioned descending guide surface, and a locking structure for locking the cross arm is provided at the locking position. When the cross arm descends from the locking position to the descending guide groove position, the angle of rotation of the cross arm relative to the main shaft is 90 degrees.

[0009] The above-mentioned cross arm lifting drive mechanism may include a lifting cylinder and a mounting sleeve. A mounting sleeve is provided on the movable sleeve on the vertical shaft corresponding to the position between the second sleeve and the third sleeve. The cylinder body of the lifting cylinder is installed at the bottom of the vertical shaft, and the protruding end of the piston rod of the lifting cylinder is installed on the mounting sleeve.

[0010] The above-mentioned plug assembly may include a plug, a ball valve, an upper connecting nipple and a lower connecting nipple. The upper connecting nipple, the ball valve and the lower connecting nipple are threaded together in sequence from top to bottom. The upper connecting nipple can be rotatably mounted on the mounting ring body. A spherical valve core is provided in the ball valve. The plug and the spherical valve core are transmission-connected. The plug switch drive mechanism drives the plug to rotate to open or close the ball valve.

[0011] The above-mentioned plug switch drive mechanism may include a fourth shaft sleeve, a fifth shaft sleeve, a sixth shaft sleeve, a seventh shaft sleeve, a third cross bar, a fourth cross bar, a fifth cross bar, a sixth cross bar, an upper collar, a lower collar, a left guide sleeve, a left guide shaft, a right guide sleeve, a right guide shaft, a left rack, a right rack and a driving cylinder. The fourth shaft sleeve and the fifth shaft sleeve are movably sleeved on the vertical shaft located between the first shaft sleeve and the second shaft sleeve, the sixth shaft sleeve and the seventh shaft sleeve are movably sleeved on the vertical rod at upper and lower intervals, the left and right ends of the third cross bar are fixedly connected to the fourth shaft sleeve and the sixth shaft sleeve respectively, the left and right ends of the fourth cross bar are fixedly connected to the fifth shaft sleeve and the seventh shaft sleeve respectively, the left and right ends of the fifth cross bar are fixedly connected to the sixth shaft sleeve and the upper collar respectively, the left and right ends of the sixth cross bar are fixedly connected to the seventh shaft sleeve and the lower sleeve respectively The rings are fixedly connected, the upper and lower rings are movably sleeved on the outside of the ball valve and are respectively located on the upper and lower sides of the plug, the bottom of the upper ring is fixedly connected with a vertically arranged left guide sleeve, the top of the lower ring corresponding to the position of the left guide sleeve is fixedly connected with a left guide shaft with the upper end passing through the left guide sleeve, the top of the lower ring is fixedly connected with a vertically arranged right guide sleeve, the bottom of the upper ring corresponding to the position of the right guide sleeve is fixedly connected with a right guide shaft with the lower end passing through the right guide sleeve, a left rack is provided on the outside of the left guide sleeve, and a right rack is provided on the outside of the right guide sleeve, a circle of gear ring is provided on the outer wall of the plug, the left rack and the right rack are located on the left and right sides of the gear ring and are respectively meshed with the gear ring, the cylinder body of the driving cylinder is mounted on the seventh shaft sleeve, and the protruding end of the piston rod of the driving cylinder is connected to the sixth shaft sleeve.

[0012] The above-mentioned mounting ring body may include a ring body body that is movably mounted on the outside of the upper connecting short section, an inner ring groove is provided on the inner top of the ring body body, an outer ring platform is provided on the outer side of the upper connecting short section and sits in the inner ring groove, and an annular upper cover for restricting the outer ring platform in the inner ring groove is detachably mounted on the ring body body corresponding to the position above the outer ring platform; an inner hexagonal countersunk hole is provided on the spherical valve core, and an inner hexagonal through hole is provided through the front and back of the plug, and an inner hexagonal wrench is passed through the inner hexagonal countersunk hole and the inner hexagonal through hole.

[0013] The first cross bar, the second cross bar, the third cross bar and the fourth cross bar may all be telescopic rod structures.

[0014] The present invention has a reasonable structure and ingenious design. Through the configuration of the present application, during the installation of the plug assembly, it is no longer necessary for the operator to manually hold the plug assembly and place it on the wellhead. This not only greatly reduces the difficulty of installing the plug assembly, but also avoids the operator being damaged by liquid and gas overflowing from the blowout during the process of transporting and placing the plug assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attachment Figure 1 It is a schematic diagram of the main structure of the best embodiment of the present invention.

[0016] Attachment Figure 2The best embodiment of the present invention is a stereoscopic Figure 1 .

[0017] Attachment Figure 3 This is a schematic diagram of the main structure of the ball valve and the plug in the best embodiment of the present invention.

[0018] Attachment Figure 4 For attachment Figure 3 Cross-sectional structural diagram along line AA.

[0019] Attachment Figure 5 It is a schematic cross-sectional view of the upper connecting short section and the mounting ring in the best embodiment of the present invention.

[0020] Attachment Figure 6 Schematic diagram of the structure of the descending track and the locking structure in the best embodiment of the present invention.

[0021] Attachment Figure 7 The best embodiment of the present invention is a stereoscopic Figure 2 .

[0022] The codes in the accompanying drawings are: 1 for the vertical shaft, 2 for the arc plate, 3 for the downward guide surface, 4 for the downward guide groove, 5 for the first sleeve, 6 for the second sleeve, 7 for the third sleeve, 8 for the first crossbar, 9 for the second crossbar, 10 for the vertical rod, 11 for the connecting rod, 12 for the roller, 13 for the lifting cylinder, 14 for the mounting sleeve, 15 for the plug, 16 for the ball valve, 17 for the upper connecting short section, 18 for the lower connecting short section, 19 for the spherical valve core, 20 for the fourth sleeve, 21 for the fifth sleeve, 22 for the sixth sleeve, 23 for the seventh sleeve, 24 for the third crossbar, 25 for the fourth crossbar, 26 for the fifth crossbar, 27 for the sixth crossbar, 28 for the upper ring, 29 for the lower ring, 3 0 is the left guide sleeve, 31 is the left guide shaft, 32 is the right guide sleeve, 33 is the right guide shaft, 34 is the left rack, 35 is the right rack, 36 is the driving cylinder, 37 is the ring body, 38 is the outer ring platform, 39 is the annular upper cover, 40 is the limit bolt, 41 is the pressure plate, 42 is the hexagonal wrench, 43 is the strip mounting hole, 44 is the fastening bolt, 45 is the limit cross bar, 46 is the limit ring body, 47 is the gear ring, 48 is the stop protrusion, 49 is the locking plate, 50 is the return spring, 51 is the limit shaft, 52 is the pull ring, 53 is the pull rope, 54 is the horizontal bottom plate, 55 is the annular bottom plate, 56 is the eighth shaft sleeve, 57 is the reinforcement rod, 58 is the card slot, and 59 is the card block. DETAILED DESCRIPTION

[0023] The present invention is not limited to the following embodiments, and specific implementation methods can be determined based on the technical solutions of the present invention and actual conditions.

[0024] In the present invention, for the convenience of description, the relative position relationship of each component is described based on the Figure 1For example, the positional relationships of front, back, up, down, left, and right are determined according to the layout directions of the drawings in the specification.

[0025] The present invention will be further described below in conjunction with the embodiments and accompanying drawings: As attached Figure 1-7 As shown, the blowout prevention and control device includes a vertical shaft 1, a cross arm, a cross arm lifting drive mechanism, a plug assembly and a plug 15 switch drive mechanism. The vertical shaft 1 is provided with a cross arm that can rotate around the vertical shaft 1 and move up and down. The plug assembly is rotatably mounted on the cross arm. The cross arm lifting drive mechanism is connected to the cross arm to drive the cross arm to move up and down. The plug 15 switch drive mechanism is connected to the plug assembly to drive the plug assembly to open or close.

[0026] When in use, the vertical shaft 1 is fixedly installed on the working platform near the wellhead, and it is ensured that the plug assembly can be aligned with the oil pipe in the wellhead when it is rotated to a certain position. When a blowout occurs, the wellhead blowout preventer is closed, and the cross arm is pushed to rotate so that the plug assembly is aligned with the oil pipe in the wellhead. The cross arm lifting drive mechanism drives the cross arm downward, and the plug assembly abuts against the oil pipe in the wellhead. Then the plug assembly is rotated to complete the buckling with the oil pipe. Specifically, the plug assembly and the oil pipe can be tightened by hydraulic pliers to complete the buckling. Therefore, during the entire installation process of the plug assembly, there is no need for the operator to manually hold the plug assembly and place it on the wellhead. This not only greatly reduces the difficulty of the plug assembly installation operation, but also avoids the operator from being damaged by liquid and gas overflowed from the blowout during the transportation and placement of the plug assembly.

[0027] The above embodiments may be further optimized and / or improved according to actual needs: As attached Figure 1-2 As shown, a downward track is fixedly mounted at the bottom of vertical shaft 1, guiding the cross arm to first rotate downward and then vertically descend. The cross arm slides on the downward track. Therefore, when a blowout occurs, the cross arm descends by first rotating downward, i.e., it rotates around vertical shaft 1 while moving downward. When the plug assembly rotates to a position aligned with the wellhead, the cross arm begins to move vertically downward, ensuring that the connecting threads of the plug assembly are aligned with the connecting threads of the oil pipe in the wellhead, thereby ensuring that the two can be properly fastened.

[0028] As attached Figure 1-2As shown, the descending track comprises an arcuate plate 2 arranged around a vertical axis 1. A descending guide surface 3 is provided on the top of the arcuate plate 2, sloping counterclockwise from top to bottom. A vertical descending guide groove 4 is provided on the arcuate plate 2 at a position corresponding to the lower portion of the descending guide surface 3. As a result, the cross arm can rotate about the vertical axis 1 as it descends along the descending guide surface 3, but can only move downward in the vertical direction along the descending guide groove 4. During the installation of the vertical axis 1, the cock assembly is ensured to align vertically with the oil pipe in the wellhead when the cross arm descends into the vertical descending guide groove 4. As a result, the cock assembly automatically rotates to a position aligned vertically with the wellhead as it descends, eliminating the need for operators to rotate the rotating assembly to achieve vertical alignment with the wellhead.

[0029] As attached Figure 1-2 As shown, the cross arm includes a first sleeve 5, a second sleeve 6, a third sleeve 7, a first cross bar 8, a second cross bar 9, a vertical rod 10, a mounting ring and a connecting rod 11. The first sleeve 5, the second sleeve 6 and the third sleeve 7 are movably sleeved on the vertical shaft 1 from top to bottom. The left end of the first cross bar 8 is fixedly connected to the first sleeve 5, and the right end of the first cross bar 8 is provided with a mounting ring. The plug assembly is rotatably mounted on the mounting ring. The left end of the second cross bar 9 is fixedly connected to the second sleeve 6, the lower end of the vertical rod 10 is fixedly connected to the right end of the second cross bar 9, and the upper end of the vertical rod 10 is fixedly connected to the middle part of the first cross bar 8. A connecting rod 11 is fixedly connected between the third sleeve 7 and the second cross bar 9. A roller 12 sitting on the downward guide surface 3 is installed on the connecting rod 11. The diameter of the roller 12 is slightly smaller than the width of the downward guide groove 4. Therefore, when the roller 12 descends along the descending guide surface 3, the cross arm can rotate around the vertical axis 1, and when the roller 12 descends into the descending guide groove 4, the cross arm can only move vertically.

[0030] As attached Figure 6As shown, a locking position is provided at the high position of the descending guide surface 3, and a locking structure for locking the cross arm is provided at the locking position. When the cross arm descends from the locking position to the position of the descending guide groove 4, the angle of rotation of the cross arm relative to the main shaft is 90 degrees. Therefore, during normal well repair operations, the cross arm is locked in the locked position, and the plug assembly and the wellhead deviate up and down, which will not affect the raising and lowering of the pipe rod during the well repair operation. After a blowout occurs, the locking structure is opened, the lock of the cross arm is released, and the cross arm moves downward along the downward guide surface 3; specifically, the locking structure in this embodiment includes a stop protrusion 48, a locking plate 49, a return spring 50, a limit shaft 51, a pull ring 52, and a pull rope 53. A stop protrusion 48 is provided on the downward guide surface 3 corresponding to the locked position to prevent the roller 12 from moving upward along the downward guide surface 3. A locking plate 49 is hingedly connected to the inner side of the arc plate 2 corresponding to the locked position. A return spring 50 is connected between the locking plate 49 and the arc plate 2. The top surface of the locking plate 49 is an inclined surface inclined from bottom to top along the low position to the high position direction of the downward guide surface 3, and a card slot 58 is provided at the high position of the inclined surface. When the lever 12 is in the locked position, the block 59 is engaged with the slot 58 and the locking plate 49 is locked by the tension of the return spring 50. When the lever 12 is in the locked position, the block 59 is engaged with the slot 58 and the locking plate 49 is locked by the tension of the return spring 50. When the lever 12 is in the locked position, the block 59 is engaged with the slot 58 and the locking plate 49 is locked by the tension of the return spring 50. When the lever 12 is in the locked position, the block 59 is engaged with the slot 58 and the locking plate 49 is locked by the tension of the return spring 50. When the lever 12 is in the locked position, the block 59 is engaged with the slot 58 and the locking plate 49 is locked by the tension of the return spring 50. When the lever 12 is in the locked position, the block 59 is engaged with the slot 58 and the locking plate 49 is locked by the tension of the return spring 50. In other embodiments, the locking structure may be a limit pin, and a first pin hole is provided on the connecting rod 11, which passes through the connecting rod 11 from top to bottom. A horizontally arranged limit plate is fixedly connected to the inner side of the arc-shaped plate 2 corresponding to the position below the first pin hole, and a second pin hole is provided on the limit plate corresponding to the position of the first pin hole. A limit pin is vertically passed through the first pin hole and the second pin hole. When locked, the roller 12 moves to the locking position on the descending guide surface 3. At this time, the first pin hole and the second pin hole are aligned up and down, and the limit pin is inserted into the first pin hole and the second pin hole from top to bottom, thereby locking the cross arm and the descending track together; when the lock is to be released, just pull out the limit pin upwards.

[0031] As attached Figure 1-2As shown, the cross arm lifting drive mechanism includes a lifting cylinder 13 and a mounting sleeve 14. The mounting sleeve 14 is provided on the movable sleeve of the vertical shaft 1 corresponding to the position between the second sleeve 6 and the third sleeve 7. The cylinder body of the lifting cylinder 13 is mounted on the bottom of the vertical shaft 1, and the extended end of the piston rod of the lifting cylinder 13 is mounted on the mounting sleeve 14. The cross arm is driven upward or downward by the extension or retraction of the piston rod of the lifting cylinder 13. Specifically, in this embodiment, the lifting cylinder 13 is connected to the air source via a three-position, five-way, center-leakage solenoid valve. When the cross arm is locked in the locked position, the three-position, five-way, center-leakage solenoid valve is controlled to be in the middle position. At this time, the rod chamber and the rodless chamber of the lifting cylinder 13 are both connected to the atmosphere. Therefore, when the cross arm is unlocked, the cross arm can descend along the downward track under its own weight.

[0032] As attached Figure 1-2 As shown, the plug assembly includes a plug 15, a ball valve 16, an upper connecting nipple 17 and a lower connecting nipple 18. The upper connecting nipple 17, the ball valve 16 and the lower connecting nipple 18 are threadedly connected together from top to bottom. The upper connecting nipple 17 is rotatably mounted on the mounting ring. A spherical valve core 19 is provided in the ball valve 16. The plug 15 and the spherical valve core 19 are transmission-connected. The switch drive mechanism of the plug 15 drives the plug 15 to rotate to open or close the ball valve 16. When the plug 15 is rotated, the spherical valve core 19 is driven to rotate synchronously, thereby achieving the purpose of controlling the opening or closing of the ball valve 16 by rotating the plug 15. The lower part of the lower connecting nipple 18 is provided with a connecting thread for threading with the oil pipe in the wellhead. By rotating the plug assembly, the lower connecting nipple 18 can be buckled together with the oil pipe.

[0033] As attached Figure 1-4As shown, the switch drive mechanism of the cock 15 includes a fourth shaft sleeve 20, a fifth shaft sleeve 21, a sixth shaft sleeve 22, a seventh shaft sleeve 23, a third cross bar 24, a fourth cross bar 25, a fifth cross bar 26, a sixth cross bar 27, an upper collar 28, a lower collar 29, a left guide sleeve 30, a left guide shaft 31, a right guide sleeve 32, a right guide shaft 33, a left rack 34, a right rack 35 and a driving cylinder 36. The fourth shaft sleeve 20 and the fifth shaft sleeve 21 are movably sleeved at an upper and lower interval at the position of the first shaft sleeve 20. On the vertical shaft 1 between the first sleeve 5 and the second sleeve 6, the sixth sleeve 22 and the seventh sleeve 23 are movably sleeved on the vertical rod 10, the left and right ends of the third crossbar 24 are respectively fixedly connected to the fourth sleeve 20 and the sixth sleeve 22, the left and right ends of the fourth crossbar 25 are respectively fixedly connected to the fifth sleeve 21 and the seventh sleeve 23, the left and right ends of the fifth crossbar 26 are respectively fixedly connected to the sixth sleeve 22 and the upper ring 28, the left and right ends of the sixth crossbar 27 are respectively fixedly connected to the seventh sleeve 2 3. The lower collar 29 is fixedly connected. The upper collar 28 and the lower collar 29 are movably sleeved on the outside of the ball valve 16 and are respectively located on the upper and lower sides of the plug 15. The bottom of the upper collar 28 is fixedly connected to a vertically arranged left guide sleeve 30. The top of the lower collar 29 corresponding to the position of the left guide sleeve 30 is fixedly connected to a left guide shaft 31 whose upper end is inserted into the left guide sleeve 30. The top of the lower collar 29 is fixedly connected to a vertically arranged right guide sleeve 32. The upper end of the right guide sleeve 32 corresponds to the position of the right guide sleeve 32. A right guide shaft 33 is fixedly connected to the bottom of the collar 28, the lower end of which is passed through the right guide sleeve 32. A left rack 34 is provided on the outside of the left guide sleeve 30, and a right rack 35 is provided on the outside of the right guide sleeve 32. A circle of ring gears 47 is provided on the outer wall of the plug 15. The left rack 34 and the right rack 35 are located on the left and right sides of the ring gear 47 and are respectively engaged with the ring gear 47. The cylinder body of the driving cylinder 36 is installed on the seventh shaft sleeve 23, and the protruding end of the piston rod of the driving cylinder 36 is connected to the sixth shaft sleeve 22. When the piston rod of the driving cylinder 36 is extended, the upper collar 28 and the lower collar 29 move away from each other, the left rack 34 moves upward, the right rack 35 moves downward, and the plug 15 rotates clockwise; when the piston rod of the driving cylinder 36 is retracted, the upper collar 28 and the lower collar 29 approach each other, the left rack 34 moves downward, the right rack 35 moves upward, and the plug 15 rotates counterclockwise; thus, the plug 15 is driven to rotate clockwise or counterclockwise by the extension and retraction of the piston rod of the driving cylinder 36, thereby controlling the opening or closing of the ball valve 16.

[0034] As attached Figure 1 、 2As shown in Figures 5 and 6, the mounting ring body includes a ring body main body 37 movably mounted on the outer side of the upper connecting short section 17, an inner ring groove is provided on the inner top of the ring body main body 37, an outer ring platform 38 is provided on the outer side of the upper connecting short section 17 and is seated in the inner ring groove, and an annular upper cover 39 for restricting the outer ring platform 38 in the inner ring groove is detachably mounted on the ring body main body 37 at a position corresponding to the upper part of the outer ring platform 38; an inner hexagonal countersunk hole is provided on the spherical valve core 19, and an inner hexagonal through hole is provided through the front and rear of the plug 15, and an inner hexagonal wrench 42 is passed through the inner hexagonal countersunk hole and the inner hexagonal through hole. Different models of oil pipes have different inner diameters, and the corresponding lower connecting short section 18 structures are also different. In this application, the mounting ring body is set to a detachable structure, and the plug 15 and the spherical valve core 19 are connected by an inner hexagonal wrench 42. Therefore, it is only necessary to remove the annular upper cover 39 and pull out the inner hexagonal wrench 42 to remove the upper connecting short section 17, the ball valve 16, and the lower connecting short section 18 from the cross arm, thereby facilitating the installation of the corresponding upper connecting short section 17, the ball valve 16, and the lower connecting short section 18 according to the oil pipe model, thereby improving the flexibility of use; specifically, a plurality of bolt mounting holes are arranged at intervals along the circumferential direction on the top of the annular body, and a limiting bolt 40 is installed in the bolt mounting hole, and a pressure plate 41 is passed through the limiting bolt 40, and the pressure plate 41 presses the annular upper cover 39 into the inner ring groove.

[0035] Preferably, the first crossbar 8, the second crossbar 9, the third crossbar 24, and the fourth crossbar 25 are all telescopic rod structures, so that the distance between the cock assembly and the vertical shaft 1 can be adjusted as needed.

[0036] As attached Figure 1 、 2 As shown in Figures 5, 7, the bottom end of the vertical shaft 1 is fixedly connected to a horizontal base plate 54, and the upper side of the horizontal base plate is fixedly connected to an annular base plate 55 arranged around the vertical shaft 1. A plurality of strip-shaped mounting holes 43 for mounting fastening bolts 44 are provided at intervals along the circumference of the bottom of the curved plate 2. The length of the strip-shaped mounting holes 43 is arranged along the circumference of the curved plate 2. The curved plate 2 and the annular base plate 55 are fixedly mounted together by the fastening bolts 44. An eighth shaft sleeve 56 is movably sleeved on the vertical shaft 1 at the position corresponding to the curved plate 2. The eighth shaft sleeve 56 and the curved plate 2 are fixedly connected together by a reinforcing rod 57. The provision of the strip-shaped mounting holes 43 allows the angle of the curved plate 2 relative to the vertical shaft 1 to be finely adjusted when the curved plate 2 is fixed. This ensures that after the curved plate 2 is fixed, when the roller 12 moves into the downward guide groove 4, the plug assembly can be aligned vertically with the oil pipe in the wellhead. Specifically, in this embodiment, the length of the strip-shaped mounting holes 43 is 3 mm to 5 mm greater than the diameter of the fastening bolt 4.

[0037] As attached Figure 1-2As shown, a limit cross bar 45 is fixedly connected to the vertical rod 10 at a position below the seventh shaft sleeve 23. The end of the limit cross bar 45 away from the vertical rod 10 is fixedly connected to a limit ring 46 that is movably sleeved on the outside of the lower connecting short section 18. This serves as a lower limit for the seventh shaft sleeve 23 and the lower collar 29.

[0038] The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the requirements of different situations.

Claims

1. A blowout prevention and control device, characterized in that It includes a vertical shaft, a cross arm, a cross arm lifting drive mechanism, a plug assembly and a plug switch drive mechanism. The vertical shaft is provided with a cross arm that can rotate around the vertical shaft and move up and down. The plug assembly is rotatably mounted on the cross arm. The cross arm lifting drive mechanism is connected to the cross arm to drive the cross arm to move up and down. The plug switch drive mechanism is connected to the plug assembly to drive the plug assembly to open or close.

2. The blowout prevention and control device according to claim 1, characterized in that A descending track for guiding the cross arm to first rotate downward and then vertically descend is fixedly installed at the bottom of the vertical shaft, and the cross arm is slidably arranged on the descending track.

3. The blowout prevention and control device according to claim 2, characterized in that The descending track includes an arc-shaped plate arranged around the vertical axis. A descending guide surface is provided on the top of the arc-shaped plate and is inclined from top to bottom in a counterclockwise direction. A vertical descending guide groove is provided on the arc-shaped plate at the lower position of the descending guide surface.

4. The blowout prevention and control device according to claim 3, characterized in that The cross arm includes a first sleeve, a second sleeve, a third sleeve, a first cross bar, a second cross bar, a vertical rod, a mounting ring and a connecting rod. The first sleeve, the second sleeve and the third sleeve are movably sleeved on the vertical shaft from top to bottom. The left end of the first cross bar is fixedly connected to the first sleeve, and the right end of the first cross bar is provided with a mounting ring. The plug assembly is rotatably mounted on the mounting ring. The left end of the second cross bar is fixedly connected to the second sleeve, the lower end of the vertical rod is fixedly connected to the right end of the second cross bar, and the upper end of the vertical rod is fixedly connected to the middle part of the first cross bar. A connecting rod is fixedly connected between the third sleeve and the second cross bar, and a roller sitting on the downward guide surface is installed on the connecting rod. The diameter of the roller is slightly smaller than the width of the downward guide groove.

5. The blowout prevention and control device according to claim 4, characterized in that A locking position is provided at the high position of the descending guide surface, and a locking structure for locking the cross arm is provided at the locking position. When the cross arm descends from the locking position to the descending guide groove position, the angle of rotation of the cross arm relative to the main shaft is 90 degrees.

6. The blowout prevention and control device according to claim 4 or 5, characterized in that The horizontal arm lifting drive mechanism includes a lifting cylinder and a mounting sleeve. A mounting sleeve is provided on the movable sleeve on the vertical shaft corresponding to the position between the second sleeve and the third sleeve. The cylinder body of the lifting cylinder is installed at the bottom of the vertical shaft, and the protruding end of the piston rod of the lifting cylinder is installed on the mounting sleeve.

7. The blowout prevention and control device according to claim 4, characterized in that The plug assembly includes a plug, a ball valve, an upper connecting nipple and a lower connecting nipple. The upper connecting nipple, the ball valve and the lower connecting nipple are threaded together from top to bottom. The upper connecting nipple is rotatably mounted on the mounting ring. A spherical valve core is provided in the ball valve. The plug and the spherical valve core are transmission-connected. The plug switch drive mechanism drives the plug to rotate to open or close the ball valve.

8. The blowout prevention and control device according to claim 7, characterized in that The plug switch drive mechanism includes a fourth shaft sleeve, a fifth shaft sleeve, a sixth shaft sleeve, a seventh shaft sleeve, a third cross bar, a fourth cross bar, a fifth cross bar, a sixth cross bar, an upper collar, a lower collar, a left guide sleeve, a left guide shaft, a right guide sleeve, a right guide shaft, a left rack, a right rack and a driving cylinder. The fourth shaft sleeve and the fifth shaft sleeve are movably sleeved at upper and lower intervals on the vertical shaft located between the first shaft sleeve and the second shaft sleeve, and the sixth shaft sleeve and the seventh shaft sleeve are movably sleeved at upper and lower intervals on the vertical rod. The left and right ends of the third cross bar are fixedly connected to the fourth shaft sleeve and the sixth shaft sleeve respectively, the left and right ends of the fourth cross bar are fixedly connected to the fifth shaft sleeve and the seventh shaft sleeve respectively, the left and right ends of the fifth cross bar are fixedly connected to the sixth shaft sleeve and the upper collar respectively, and the left and right ends of the sixth cross bar are fixedly connected to the seventh shaft sleeve and the lower collar respectively. The upper and lower collars are movably sleeved on the outside of the ball valve and are respectively located on the upper and lower sides of the plug. The bottom of the upper collar is fixedly connected to a vertically arranged left guide sleeve. The top of the lower collar corresponding to the position of the left guide sleeve is fixedly connected to a left guide shaft with an upper end passing through the left guide sleeve. The top of the lower collar is fixedly connected to a vertically arranged right guide sleeve. The bottom of the upper collar corresponding to the position of the right guide sleeve is fixedly connected to a right guide shaft with a lower end passing through the right guide sleeve. A left rack is provided on the outside of the left guide sleeve, and a right rack is provided on the outside of the right guide sleeve. A circle of gear ring is provided on the outer wall of the plug. The left rack and the right rack are located on the left and right sides of the gear ring and mesh with the gear ring respectively. The cylinder body of the driving cylinder is mounted on the seventh shaft sleeve, and the protruding end of the piston rod of the driving cylinder is connected to the sixth shaft sleeve.

9. The blowout prevention and control device according to claim 7 or 8, characterized in that The mounting ring body includes a ring body that is movably mounted on the outside of the upper connecting short section, an inner ring groove is provided on the inner top of the ring body, an outer ring platform is provided on the outer side of the upper connecting short section and sits in the inner ring groove, and an annular upper cover for restricting the outer ring platform in the inner ring groove is detachably mounted on the ring body corresponding to the position above the outer ring platform; an inner hexagonal countersunk hole is provided on the spherical valve core, and an inner hexagonal through hole is provided through the front and back of the plug, and an inner hexagonal wrench is passed through the inner hexagonal countersunk hole and the inner hexagonal through hole.

10. The blowout prevention and control device according to claim 8, characterized in that The first cross bar, the second cross bar, the third cross bar and the fourth cross bar are all telescopic rod structures.

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