Blowout preventer follow-up seat and construction method

Abstract

The invention relates to a blowout preventer follow-up seat and a construction method. The blowout preventer follow-up seat comprises a back holding clamp, a front holding clamp, a backrest, a supporting beam and a seat body. The back holding clamp comprises a pipe clamp, a vertical pipe, a connecting plate and a handle; the front-side holding clamp comprises a pipe clamp, a front-side holding clamp vertical pipe, a front-side holding clamp connecting plate, a three-lug seat, a double-lug seat and a foot rest lever; the front embracing clamp and the back embracing clamp are opposite to each other and are fixed on the blowout prevention pipe through bolts; the seat comprises a seat plate, a backrest and armrests; and the seat is connected with the front embracing clamp through the supporting beam and the connecting beam. According to the follow-up seat of the blowout preventer, the follow-up seat can be switched between two states, the follow-up seat is in a folded state during transportation, transportation is convenient, the follow-up seat is in an unfolded state during construction, the structure is simple, installation is convenient, construction convenience is improved, construction efficiency is improved, and safety of operators is protected.

Description

Technical Field

[0001] The present invention relates to the technical field of oil machinery, and specifically, to a follow-up seat for a blowout preventer device. Background Art

[0002] The derrick type coiled tubing equipment is a commonly used coiled tubing equipment in foreign regions at present, and the coiled tubing operation can be completed without using a crane. However, due to the limitations of road transportation conditions in China, the commonly used coiled tubing equipment is mostly vehicle-mounted, trailer-mounted, skid-mounted, etc. When operating, a crane is needed to lift the injector head to connect to operation devices such as a blowout preventer and a blowout preventer pipe. The operation mode of the derrick type coiled tubing equipment is very different from that in China. The connection between the injector head and the blowout preventer device is completed at high altitude. The blowout preventer device is flipped from a lying state to a vertical state, and the mobile platform drives the injector head to move up and down, left and right, and back and forth to align with the blowout preventer device. After alignment, a person needs to rotate the union under the blowout preventer box in mid-air to connect to the bottom blowout preventer device, and the blowout preventer box is fixed under the injector head. People need to climb to mid-air to operate, and the blowout preventer pipe is a cylindrical steel pipe, and it cannot be climbed without using professional devices. To solve the above problems, the present invention is specifically proposed. Summary of the Invention

[0003] In view of the above deficiencies in the prior art, the present invention provides a follow-up seat for a blowout preventer device with a simple structure, convenient installation, improved construction convenience, and protection of the safety of operators.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A follow-up seat for a blowout preventer device, comprising: a back clamp, a front clamp, a support beam, and a seat; the front clamp and the back clamp are oppositely arranged and are connected to the blowout preventer pipe through bolts;

[0006] The back clamp includes: a pipe clamp, a riser pipe, a connecting plate, and a handle;

[0007] Two mutually parallel riser pipes are connected through a connecting plate;

[0008] Upper and lower pipe clamps are respectively arranged on the outer side of the connecting plate;

[0009] The connecting plate includes an upper connecting plate and a lower connecting plate;

[0010] The upper connecting plate and the lower connecting plate are connected through a handle;

[0011] The front clamp includes: a pipe clamp, a front clamp riser pipe, a front clamp connecting plate, a three-ear seat, a two-ear seat, and a support rod;

[0012] Mutually parallel front clamp riser pipes are connected through a front clamp connecting plate;

[0013] The front clamping connecting plate includes: an upper connecting plate, a middle connecting plate, and a lower connecting plate;

[0014] Upper and lower pipe clamps are respectively arranged on the inner sides of the ends of the front clamping riser pipes;

[0015] Three parallel connecting ears are arranged on the upper connecting plate; the three connecting ears form a three-ear seat;

[0016] A support beam connecting ear is arranged on the middle connecting plate;

[0017] The support beam connecting ear is composed of two parallel connecting ears, forming a double-ear seat;

[0018] A double-ear seat connection hole is arranged on the double-ear seat;

[0019] A support rod is arranged on the lower connecting plate;

[0020] The axis of the support rod is horizontally arranged;

[0021] The seat includes: a seat board, a backrest, and armrests;

[0022] The backrest and the armrests are of an integral structure;

[0023] A seat connecting plate is arranged at the lower part of the armrest; the seat connecting plate is provided with a seat connecting plate connection hole;

[0024] Seat board connecting ears are arranged at the lower parts on both sides of the seat board; the connecting ears are provided with ear holes;

[0025] The seat board connecting ears and the seat connecting plate are hinged by a pin shaft;

[0026] A limiting plate is arranged on the seat connecting plate;

[0027] The limiting plate is arranged above the seat connecting plate connection hole;

[0028] The upper surface of the limiting plate is parallel to the center line of the seat connecting plate connection hole;

[0029] A limiting plate is arranged horizontally on the seat connecting plate;

[0030] A seat board support seat is arranged at the rear end of the bottom of the seat board near the backrest; the support seat is provided with a support hole;

[0031] The seat board support seat is connected to the double-ear seat through a support beam;

[0032] The upper end of the support beam is connected to the support hole of the support seat by a pin shaft;

[0033] The lower end of the support beam is connected to the double-ear seat by bolts;

[0034] The seat board support seat and the support beam are in hinge connection;

[0035] The support beam is hinged to the double-ear seat;

[0036] A connecting beam is arranged in the middle of the front end of the seat plate;

[0037] The front end of the connecting beam is connected to the triple-ear seat through a pin shaft;

[0038] The backrest and the armrest are welded by round tubes;

[0039] A backrest connecting seat for connecting to the double-ear seat is arranged at the middle position of the backrest;

[0040] Two rectangular holes for penetrating the front-side clamping double-ear seat are arranged at the middle position of the seat plate.

[0041] Preferably, the upper pipe clamp and the lower pipe clamp are fixedly connected to the vertical pipe;

[0042] The upper end face of the upper pipe clamp and the top end of the vertical pipe are in the same plane;

[0043] The lower end face of the lower pipe clamp and the bottom end of the vertical pipe are in the same plane.

[0044] The handle is in the shape of a bracket; the two free ends of the handle are respectively connected to the upper connecting plate and the lower connecting plate;

[0045] The pipe clamp is semi-circular, a rectangular connecting part is arranged at the free end, and a pipe clamp connecting hole is arranged on the rectangular connecting part;

[0046] The pipe clamp is welded to the upper end and the lower end of the vertical pipe, and the arc opening faces the opposite direction of the vertical pipe;

[0047] Two connecting plates are welded on the vertical pipe, and the connecting plates are welded in the opposite direction of the arc opening of the pipe clamp.

[0048] Preferably, the connecting beam is in the shape of an H, and the rear end of the connecting beam is connected to the seat plate;

[0049] Two transverse connecting pipes are respectively arranged at the two free ends of the H-shaped connecting beam;

[0050] The transverse connecting pipe is connected to the triple-ear seat through a pin shaft.

[0051] Preferably, a support beam connecting hole is arranged at the lower end of the support beam; the support beam connecting hole is connected to the double-ear seat through a bolt;

[0052] Two support beam connecting plates are arranged at the upper end of the support beam;

[0053] The support beam connecting plates are arranged on both sides of the support beam;

[0054] Support beam connecting ears are arranged on the support beam connecting plates;

[0055] Support beam connecting ear holes are arranged on the support beam connecting ears;

[0056] The support beam connection ear holes provided on both sides of the support beam are coaxial;

[0057] The support beam connection ears are connected to the seat plate support base by bolts.

[0058] Preferably, the backrest connection seat includes round tubes provided at both ends,

[0059] The round tubes at both ends are connected by a connection seat connecting plate;

[0060] A backrest horizontal round tube is provided in the middle of the backrest main body;

[0061] The upper round tube of the connection seat is sleeved on the backrest horizontal round tube.

[0062] Preferably, the height of the three-ear seat is greater than the height of the two-ear seat.

[0063] Preferably, the distance between the center line of the ear hole of the three-ear seat and the middle connecting plate is - centimeters;

[0064] The distance between the center line of the ear hole of the two-ear seat and the upper connecting plate is - centimeters.

[0065] A construction method for a follow-up seat of an anti-blowout device,

[0066] Folded state:

[0067] The lower end of the support beam is disengaged from the two-ear seat of the front clamp; the seat plate loses the support of the support beam and rotates downward with the three-ear plate as the rotation axis; the support beam fits with the lower surface of the seat plate; the upper surface of the seat plate fits with the backrest surface; the front end of the two-ear seat penetrates through the rectangular hole at the bottom of the seat plate, and the front end of the two-ear seat is connected to the two-ear seat of the front clamp by bolts; the seat plate rotates upward with the three-ear plate as the rotation axis under the support of the support beam; the support beam is separated from the lower surface of the seat plate; the upper surface of the seat plate is separated from the backrest surface; the follow-up seat of the anti-blowout device reaches the unfolded state;

[0068] The follow-up seat of the anti-blowout device is fixed on the blowout prevention pipe at the top of the blowout prevention device. When the equipment is transported, the blowout prevention device is placed horizontally, the distance between the blowout prevention device and the mobile platform is small, and the follow-up seat is in the folded state; during equipment construction, the derrick of the equipment is erected and the mobile platform is raised to a high position; the operator sits on the follow-up seat in advance, the oil cylinder pushes the blowout prevention device from the horizontal to the vertical state, and the person also reaches the high position with the swing of the blowout prevention device. At this time, by vertically, forward and backward, and left and right adjusting the mobile platform, the blowout prevention box below the injector head is aligned with the blowout prevention pipe. The operator sitting on the follow-up seat rotates the union below the blowout prevention box to connect with the blowout prevention device. After the connection is completed, the operator climbs down from the blowout prevention device to perform coiled tubing operations.

[0069] The beneficial effects of the present invention compared with the prior art:

[0070] The follow-up seat of the blowout preventer device of the present invention has two state switches. It is in a folded state during transportation, which is convenient for transportation. During construction, it is in an unfolded state, with a simple structure, convenient installation, improved construction convenience, improved construction efficiency, and protection of the safety of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Figure 1 is a three-dimensional structural schematic diagram of the unfolded state of the follow-up seat of the blowout preventer device of the present invention;

[0072] Figure 2 is a front view structural schematic diagram of the unfolded state of the follow-up seat of the blowout preventer device of the present invention;

[0073] Figure 3 is a top view structural schematic diagram of the unfolded state of the follow-up seat of the blowout preventer device of the present invention;

[0074] Figure 4 is a three-dimensional structural schematic diagram of the retracted state of the follow-up seat of the blowout preventer device of the present invention;

[0075] Figure 5 is a rear view structural schematic diagram of the retracted state of the follow-up seat of the blowout preventer device of the present invention;

[0076] Figure 6 is a front clamping structure schematic diagram of the follow-up seat of the blowout preventer device of the present invention;

[0077] Figure 7 is a support beam structure schematic diagram of the follow-up seat of the blowout preventer device of the present invention;

[0078] Figure 8 is a three-dimensional structural schematic diagram of the backrest of the follow-up seat of the blowout preventer device of the present invention;

[0079] Figure 9 is a front view structural schematic diagram of the backrest of the follow-up seat of the blowout preventer device of the present invention;

[0080] Figure 10 is a side view structural schematic diagram of the backrest of the follow-up seat of the blowout preventer device of the present invention;

[0081] Figure 11 is a bottom view structural schematic diagram of the seat plate of the follow-up seat of the blowout preventer device of the present invention;

[0082] Figure 12 is Figure 11 the schematic diagram of the A-A cross-sectional mechanism of;

[0083] Figure 13 is a side view structural schematic diagram of the seat plate of the follow-up seat of the blowout preventer device of the present invention;

[0084] Figure 14 is a top view structural schematic diagram of the seat plate of the follow-up seat of the blowout preventer device of the present invention;

[0085] Figure 15 It is a schematic side view structure of the seat board of the follow-up seat of the blowout preventer device of the present invention;

[0086] Figure 16 It is a schematic structure diagram of the back clamping of the follow-up seat of the blowout preventer device of the present invention.

[0087] Description of the main component symbols in the drawings:

[0088] In the figure:

[0089] 1. Back clamp 2. Front clamp

[0090] 3. Backrest 4. Support beam

[0091] 5. Seat 6. Standpipe

[0092] 7. Handle 8. Upper pipe clamp

[0093] 9. Lower pipe clamp 10. Upper connecting plate

[0094] 11. Lower connecting plate 12. Seat connecting plate connection hole

[0095] 13. Front clamp standpipe 14. Three-ear seat

[0096] 15. Two-ear seat 16. Connecting beam

[0097] 17. Upper connecting plate 18. Middle connecting plate

[0098] 19. Lower connecting plate 20. Blowout prevention pipe

[0099] 21. Support beam connecting ear 22. Support beam connecting plate

[0100] 23. Two-ear seat connection hole 24. Support rod

[0101] 25. Seat board 26. Backrest connection seat

[0102] 27. Armrest 28. Seat connecting plate

[0103] 29. Seat board connecting ear 30. Limiting plate

[0104] 31. Seat board support seat 32. Rectangular hole

[0105] 33. Backrest horizontal round pipe 34. Blowout preventer. Detailed implementation method

[0106] The present invention will be described in detail below with reference to the drawings and embodiments:

[0107] Appendix Figure 1-15It can be known that a follow-up seat of a blowout preventer device includes: a back clamp 1, a front clamp 2, a backrest 3, a support beam 4, and a seat 5; the front clamp and the back clamp are arranged opposite to each other and are connected to the blowout preventer pipe 20 by bolts;

[0108] The back clamp includes: a pipe clamp, a riser pipe 6, a connecting plate, and a handle 7;

[0109] Two mutually parallel riser pipes are connected by a connecting plate;

[0110] An upper pipe clamp 8 and a lower pipe clamp 9 are respectively arranged on the outside of the connecting plate;

[0111] The connecting plate includes an upper connecting plate 10 and a lower connecting plate 11;

[0112] The upper connecting plate 10 and the lower connecting plate 11 are connected by a handle 7;

[0113] The front clamp includes: a pipe clamp, a front clamp riser pipe 13, a front clamp connecting plate, a three-ear seat 14, a two-ear seat 15, and a support rod 24;

[0114] Mutually parallel front clamp riser pipes 13 are connected by a front clamp connecting plate;

[0115] The front clamp connecting plate includes: an upper connecting plate 17, a middle connecting plate 18, and a lower connecting plate 19;

[0116] Inner sides of the ends of the front clamp riser pipes 13 are respectively provided with a front clamp upper pipe clamp and a front clamp lower pipe clamp;

[0117] Three mutually parallel connecting ears are arranged on the upper connecting plate 17; the three connecting ears form a three-ear seat 14;

[0118] A two-ear seat 15 is arranged on the middle connecting plate 17;

[0119] The two-ear seat 15 is two mutually parallel connecting ears;

[0120] A two-ear seat connection hole 23 is arranged on the two-ear seat;

[0121] A support rod 24, that is, a footrest rod, is arranged on the lower connecting plate 19;

[0122] The axis of the support rod is horizontally arranged;

[0123] The seat 5 includes: a seat board 25, a backrest 3, and an armrest 27;

[0124] The backrest 3 and the armrest 27 are of an integral structure;

[0125] A seat connecting plate 28 is arranged at the lower part of the armrest; the seat connecting plate 28 is provided with a seat connecting plate connection hole 12;

[0126] Lower parts on both sides of the seat plate 25 are provided with seat plate connecting lugs 29; the connecting lugs are provided with ear holes;

[0127] The seat plate connecting lugs 29 and the seat connecting plate 28 are hinged through a pin shaft;

[0128] A limiting plate 30 is arranged on the seat connecting plate 28;

[0129] The limiting plate 30 is arranged above the connecting hole of the seat connecting plate;

[0130] The upper surface of the limiting plate is parallel to the center line of the connecting hole of the seat connecting plate;

[0131] A limiting plate is arranged horizontally on the seat connecting plate;

[0132] A seat plate support seat 31 is arranged at the rear end of the bottom of the seat plate near the backrest; the support seat is provided with a support hole;

[0133] The seat plate support seat 31 is connected to the double-ear seat 15 through a support beam 4;

[0134] The upper end of the support beam 4 is connected to the support hole of the support seat through a pin shaft;

[0135] The lower end of the support beam 4 is connected to the double-ear seat 15 through a bolt;

[0136] The seat plate support seat and the support beam are in hinge connection;

[0137] The support beam and the double-ear seat are in hinge connection;

[0138] A connecting beam 16 is arranged in the middle of the front end of the seat plate;

[0139] The front end of the connecting beam 16 is connected to the triple-ear seat 14 through a pin shaft;

[0140] The backrest and the armrest are welded by round tubes;

[0141] A backrest connecting seat 26 for connecting to the double-ear seat is arranged at the middle position of the backrest;

[0142] Two rectangular holes 32 for passing through the front-facing clamping double-ear seat 15 are arranged at the middle position of the seat plate.

[0143] Preferably, the upper pipe clamp and the lower pipe clamp are fixedly connected to the riser pipe;

[0144] The upper end face of the upper pipe clamp is in the same plane as the top end of the riser pipe;

[0145] The lower end face of the lower pipe clamp is in the same plane as the bottom end of the riser pipe.

[0146] Preferably, the handle is in the shape of a square bracket; the two free ends of the handle are respectively connected to the upper connecting plate and the lower connecting plate;

[0147] The pipe clamp is semi-circular, with a rectangular connecting part provided at the free end, and a pipe clamp connecting hole is provided on the rectangular connecting part;

[0148] The pipe clamp is welded to the upper and lower ends of the riser pipe, and the arc opening faces the opposite direction of the riser pipe;

[0149] Two connecting plates are welded on the riser pipe, and the connecting plates are welded in the opposite direction of the arc opening of the pipe clamp.

[0150] Preferably, the connecting beam is in an H shape, and the rear end of the connecting beam is connected to the seat plate;

[0151] Transverse connecting pipes are respectively provided at the two free ends of the H-shaped connecting beam;

[0152] The transverse connecting pipe is connected to the three-ear seat through a pin shaft.

[0153] Preferably, a support beam connecting hole is provided at the lower end of the support beam; the support beam connecting hole is connected to the two-ear seat through a bolt;

[0154] Two support beam connecting plates 22 are provided at the upper end of the support beam 4;

[0155] The support beam connecting plates 22 are arranged on both sides of the support beam 4;

[0156] Support beam connecting ears 21 are provided on the support beam connecting plates;

[0157] Support beam connecting holes are provided on the support beam connecting ears;

[0158] The support beam connecting holes arranged on both sides of the support beam are coaxial;

[0159] The support beam connecting ears are connected to the seat plate support seat 31 through bolts.

[0160] Preferably, the backrest connecting seat 26 includes an upper circular pipe 261 and a lower circular pipe 262 provided at both ends,

[0161] The upper circular pipe 261 and the lower circular pipe 262 are connected through a connecting seat connecting plate;

[0162] A backrest horizontal circular pipe 33 is provided in the middle of the backrest main body;

[0163] The upper circular pipe of the backrest connecting seat 26 is sleeved on the backrest horizontal circular pipe 33.

[0164] Preferably, the height of the three-ear seat is greater than the height of the two-ear seat.

[0165] Preferably, the distance between the center line of the ear hole of the three-ear seat and the middle connecting plate is 15 - 20 cm;

[0166] The distance between the center line of the ear hole of the two-ear seat and the upper connecting plate is 5 - 10 cm.

[0167] A construction method for a follow-up seat of a blowout preventer device

[0168] Folded state:

[0169] The lower end of the support beam is disengaged from the double-ear seat of the front clamp; the seat plate loses the support of the support beam 4 and rotates downward with the three-ear plate as the rotation axis; the support beam fits against the lower surface of the seat plate; the upper surface of the seat plate fits against the backrest surface; the front end of the double-ear seat passes through the rectangular hole at the bottom of the seat plate, and the support beam 4 is embedded in the double-ear seat; the front end of the double-ear seat is connected to the lower round tube of the backrest connecting seat by bolts; the lower round tube of the backrest connecting seat is embedded in the front end of the double-ear seat, and the blowout preventer device follow-up seat reaches the folded state, and the entire blowout preventer device follow-up seat becomes an integral body.

[0170] Unfolded state:

[0171] The front end of the double-ear seat is separated from the backrest connecting seat; the lower end of the support beam is connected to the double-ear seat of the front clamp by bolts; the seat plate rotates upward with the three-ear plate as the rotation axis under the support of the support beam; the support beam is separated from the lower surface of the seat plate; the upper surface of the seat plate is separated from the backrest surface; the blowout preventer device follow-up seat reaches the unfolded state;

[0172] The blowout preventer device follow-up seat is fixed on the blowout preventer pipe at the top of the blowout preventer device. When the equipment is transported, the blowout preventer device is placed horizontally, the distance between the blowout preventer device and the mobile platform is small, and the follow-up seat is in the folded state; during equipment construction, the derrick of the equipment is erected and the mobile platform is raised to a high position; the operator sits on the follow-up seat in advance, and the oil cylinder pushes the blowout preventer device from the horizontal to the vertical state, and the person also reaches the high position with the swing of the blowout preventer device. At this time, by adjusting the mobile platform vertically, forward and backward, and left and right, the blowout preventer box below the injector head is aligned with the blowout preventer pipe. The operator sitting on the follow-up seat rotates the union below the blowout preventer box to connect with the blowout preventer device. After the connection is completed, the operator climbs down from the blowout preventer device and conducts coiled tubing operations.

[0173] The blowout preventer device follow-up seat of the present invention has two state switches. It is in the folded state during transportation, which is convenient for transportation. It is in the unfolded state during construction. It has a simple structure, is easy to install, improves construction convenience, improves construction efficiency, and protects the safety of operators.

[0174] The above is only a preferred embodiment of the present invention, and does not impose any form of limitation on the structure of the present invention. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention all fall within the scope of the technical solution of the present invention.

Claims

1. A blowout prevention device follow-up seat, characterized in that: include: Back clamp (1), front clamp (2), support beam (4) and seat (5); The front clamp and the back clamp are arranged opposite to each other and connected to the blowout preventer (20) via bolts; The back clamp comprises: a pipe clamp, a vertical pipe (6), a connecting plate and a handle (7); Two parallel risers are connected by a connecting plate; An upper pipe clamp (8) and a lower pipe clamp (9) are respectively arranged on the outer side of the connecting plate; The connecting plate comprises an upper connecting plate (10) and a lower connecting plate (11); The upper connecting plate (10) and the lower connecting plate (11) are connected via a handle (7); The front clamp comprises: a pipe clamp, a front clamp riser (13), a front clamp connecting plate, a three-ear seat (14), a two-ear seat (15) and a support rod (24); The mutually parallel front clamping risers (13) are connected via a front clamping connecting plate; The front clamping connecting plate comprises: an upper connecting plate (17), a middle connecting plate (18) and a lower connecting plate (19); An upper front clamping pipe clamp and a lower front clamping pipe clamp are respectively arranged on the inner side of the end of the front clamping vertical pipe (13); The upper connecting plate (17) is provided with three mutually parallel connecting ears; the three connecting ears form a three-ear seat (14); A double-ear seat (15) is arranged on the middle connecting plate (17); The double ear seat (15) is two parallel connecting ears; The double-ear seat is provided with a double-ear seat connecting hole (23); A support rod (24) is provided on the lower connecting plate (19); The axis of the support rod is arranged horizontally; The seat (5) comprises: a seat plate (25), a backrest (3) and armrests (27); The backrest (3) and the armrest (27) are an integrated structure; A seat connection plate (28) is provided at the lower part of the armrest; the seat connection plate (28) is provided with a seat connection plate connection hole; The lower parts of both sides of the seat plate (25) are provided with seat plate connecting ears (29); The seat plate connecting ear (29) is hingedly connected to the seat connecting plate (28) via a pin shaft; A limit plate (30) is provided on the seat connection plate (28); The limiting plate (30) is arranged above the connecting hole of the seat connecting plate; The upper surface of the limit plate is parallel to the center line of the connection hole of the seat connection plate; A seat board support seat (31) is provided at the rear end of the bottom of the seat board near the backrest; the support seat is provided with a support hole; The seat plate support seat is connected to the double-ear seat (15) via a support beam (4); The upper end of the support beam (4) is connected to the support hole of the support seat through a pin shaft; The lower end of the support beam (4) is connected to the double-ear seat (15) by bolts; A connecting beam (16) is arranged at the middle of the front end of the seat plate; The front end of the connecting beam (16) is connected to the three-ear seat (14) through a pin shaft; The backrest and armrests are welded from round tubes; A backrest connecting seat (26) for connecting with the double-ear seat is arranged in the middle of the backrest; Two rectangular holes (32) for penetrating the front clamping double-ear seat (15) are arranged in the middle of the seat plate.

2. The blowout prevention device follower seat according to claim 1, characterized in that: The upper pipe clamp and the lower pipe clamp are fixedly connected to the riser; The upper end surface of the upper pipe clamp is in the same plane as the top of the riser; The lower end surface of the lower pipe clamp is in the same plane as the bottom end of the vertical pipe.

3. The blowout prevention device follower seat according to claim 1 is characterized in that: The handle is in the shape of a bracket; two free ends of the handle are respectively connected to the upper connecting plate and the lower connecting plate; The pipe clamp is semicircular, and a rectangular connecting portion is provided at the free end, and a pipe clamp connecting hole is provided at the rectangular connecting portion; The pipe clamp is welded to the upper and lower ends of the riser, with the arc opening facing the opposite direction of the riser; Two connecting plates are welded on the vertical pipe, and the connecting plates are welded in the opposite direction of the arc opening of the pipe clamp.

4. The blowout prevention device follower seat according to claim 1 is characterized in that: The connecting beam is H-shaped, and the rear end of the connecting beam is connected to the seat plate; Two free ends of the H-shaped connecting beam are respectively provided with transverse connecting pipes; The transverse connecting pipe is connected with the three-ear seat through a pin shaft.

5. The blowout prevention device follower seat according to claim 1 is characterized in that: A support beam connection hole is provided at the lower end of the support beam; the support beam connection hole is connected to the double ear seat through bolts; Two support beam connecting plates (22) are arranged at the upper end of the support beam (4); The support beam connecting plates (22) are arranged on both sides of the support beam (4); A support beam connection ear (21) is provided on the support beam connection plate; The support beam connection ear is provided with a support beam connection ear hole; The support beam connection ear holes arranged on both sides of the support beam are coaxial; The support beam connecting ear is connected to the seat plate supporting seat through bolts.

6. The blowout prevention device follower seat according to claim 1, characterized in that: The backrest connecting seat (26) comprises round tubes arranged at both ends. The round tubes at both ends are connected by a connecting seat and a connecting plate; A backrest horizontal round tube is arranged in the middle of the backrest body; The upper round tube of the connecting seat is sleeved on the horizontal round tube of the backrest.

7. The blowout prevention device follower seat according to claim 1 is characterized in that: The height of the three-ear seat is greater than the height of the two-ear seat.

8. The blowout prevention device follower seat according to claim 7, characterized in that: The distance between the center line of the ear hole of the three-ear seat and the middle connecting plate is 15-20 cm; The distance between the center line of the ear hole of the double ear seat and the upper connecting plate is 5-10 cm.

9. The construction method of the blowout prevention device follower seat according to any one of claims 1 to 8, characterized in that: Folded state: The lower end of the support beam is disengaged from the double-ear seat of the front clamp; The seat plate loses the support of the support beam and rotates downward with the three-ear plate as the rotation axis; the support beam fits the lower surface of the seat plate; The upper surface of the seat board fits with the surface of the backrest; the front end of the double-ear seat passes through the rectangular hole at the bottom of the seat board, and the front end of the double-ear seat is connected to the backrest connecting seat by bolts; the anti-spray device follows the seat to reach a folded state. Expanded state: The front end of the double-ear seat is separated from the backrest connection seat; the lower end of the support beam is connected to the double-ear seat of the front clamp through bolts; the seat plate is supported by the support beam and rotates upward with the three-ear plate as the rotation axis; the support beam is separated from the lower surface of the seat plate; The upper surface of the seat board is separated from the backrest surface; the anti-spray device moves with the seat to reach the unfolded state; The follow-up seat of the blowout preventer is fixed on the blowout preventer at the top of the blowout preventer. When the equipment is transported, the blowout preventer is placed horizontally, the distance between the blowout preventer and the mobile platform is small, and the follow-up seat is in a folded state. When the equipment is constructed, the derrick of the equipment is erected and the mobile platform is raised to a high position. The operator sits on the follow-up seat in advance, and the oil cylinder pushes the blowout preventer from a horizontal to a vertical state, and the person also reaches a high position as the blowout preventer swings. At this time, the mobile platform is adjusted vertically, front and back, and left and right to align the blowout preventer box under the injection head with the blowout preventer. The operator sitting on the follow-up seat turns the union under the blowout preventer box to connect it with the blowout preventer. After the connection is completed, the operator climbs down from the blowout preventer to perform continuous oil pipe operations.

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