Adjustable drilling and production well control blowout preventer

Abstract

The invention discloses an adjustable drilling and production well control blowout preventer, and relates to the technical field of blowout preventers. The device comprises a communication box, and is characterized in that the communication box; a reversing structure is rotationally connected to the middle of the upper end face of an inner cavity of the communicating box, a flow blocking structure is arranged in an inner cavity of the reversing structure, a limiting structure is arranged on the lower portion of the communicating box, connecting structures are fixedly connected to the middles of the left side and the right side of the communicating box, and splicing structures are fixedly connected to the sides, away from the communicating box, of the two connecting structures correspondingly. A connecting pipe is closed through a reversing structure on a communicating box and a flow blocking structure, and the rotated flow blocking structure is limited and fixed through cooperation of a limiting gear, a locking clamping rod and a locking spring, so that the stability of the closed state of the connecting pipe is guaranteed, and accidental opening is prevented; and when the petroleum eruption pressure reaches a certain degree, the connecting pipes can be communicated, so that the petroleum can flow normally, and the normal operation of the device in the petroleum exploitation process is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of blowout preventers, and particularly to an adjustable drilling and production well control blowout prevention device. Background Technique

[0002] In the safety regulations for oil and gas drilling, in the construction of oil and gas drilling, in order to safely drill through high-pressure oil and gas layers and avoid the occurrence of out-of-control drilling blowout accidents, a set of equipment - a drilling well control device needs to be installed on the wellhead of the drilling. When the pressure in the wellbore is less than the formation pressure, oil, gas, and water in the underground formation enter the wellbore and form overflow or kick. In severe cases, drilling blowout and fire accidents may occur. The function of the drilling well control device is to quickly and timely close the wellhead when overflow or kick occurs in the well to prevent the occurrence of blowout accidents.

[0003] After retrieval, a Chinese invention patent discloses a blowout prevention device for oil exploration drilling with the publication number of CN118548011A, belonging to the technical field of blowout preventers, which is used to solve the problem that the blowout preventer is prone to untimely operation in some emergency situations; it includes a blowout prevention mechanism; the internal working data of the blowout preventer is monitored and collected in real time by a detector, and the internal working data is processed to obtain the corresponding execution level, and a corresponding execution level signal is generated and sent to the detector. The detector adjusts the opening and closing degree of the blowout preventer according to the expansion volumes of the first expansion airbag and the second expansion airbag corresponding to the execution level. By this method, the technical level of the staff operating the blowout preventer can be reduced. At the same time, in the face of emergencies and untimely manual responses, the wellhead can be quickly sealed to prevent oil from spraying out. This device combines manual adjustment with intelligent adjustment, retaining the flexibility of manual adjustment and having the intelligence of intelligent adjustment to reduce the operation technology of the staff.

[0004] For the existing drilling and production well control blowout prevention device, due to the simple connection structure, it can only be adapted to connection pipes of specific sizes. When the previous device closes the connection pipe, there are problems such as complex operation or insufficient stability after closing.

[0005] Therefore, the existing adjustable drilling and production well control blowout prevention device cannot meet the requirements in actual use, so there is an urgent need for improved technology in the market to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide an adjustable drilling and production well control blowout prevention device, which solves the problems raised in the above background technique through the settings.

[0007] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0008] The present invention relates to an adjustable drilling and production well control blowout preventer device, which includes a communication box. In the middle of the upper end face of the inner cavity of the communication box, there is a rotation structure rotatably connected. In the inner cavity of the rotation structure, there is a flow blocking structure. At the lower part of the communication box, there is a limit structure. In the middle of the left and right sides of the communication box, there are connection structures fixedly connected. On the sides of the two connection structures away from the communication box, there are splicing structures fixedly connected respectively. In the inner cavity of the splicing structure, there is a fixing structure. On the outer surface of the splicing structure, there is a transmission structure rotatably connected. In the middle of the lower end face of the communication box, there is a driving structure.

[0009] Preferably, the rotation structure includes a rotation shaft rotatably connected to the upper end face of the inner cavity of the communication box. In the middle of the upper end face of the communication box, there is a rotation wrench rotatably connected. The rotation shaft at the upper end face penetrates through the communication box and is fixedly connected to the rotation wrench. On the lower end face of the rotation wrench, there is a placement rack fixedly connected. In the middle of the left end face of the placement rack, there is a sealing plate fixedly connected. On the side of the inner cavity of the placement rack close to the sealing plate, there is a flow blocking structure fixedly connected.

[0010] Preferably, the flow blocking structure includes a telescopic rod fixedly connected to the side of the inner cavity of the placement rack close to the sealing plate. A spring is movably sleeved on the outer surface of the telescopic rod. On the side of the spring away from the sealing plate, there is a flow blocking block fixedly connected. There is a spring drivingly connected between the flow blocking block and the sealing plate.

[0011] Preferably, the limit structure includes a transmission shaft fixedly connected to the lower part of the outer surface of the placement rack. In the middle of the lower end face of the communication box, there is a limit gear fixedly connected. The rotation shaft at the lower end face of the transmission shaft penetrates through the communication box and is fixedly connected to the limit gear. On the lower end face of the communication box on the right side of the limit gear, there is a locking structure fixedly connected;

[0012] The locking structure includes a locking frame fixedly connected to the lower end face of the communication box on the right side of the limit gear. A locking spring is movably sleeved in the inner cavity of the locking frame. A locking latch is slidably connected in the inner cavity of the locking frame. There is a locking spring drivingly connected between the locking latch and the locking frame. One end of the locking latch close to the limit gear meshes with the limit gear.

[0013] Preferably, the connection structure includes connection pipes respectively fixedly connected to the left and right sides of the communication box. On the side walls of the inner cavities of the connection pipes close to the communication box, there are sealing rings fixedly connected. The inner cavity radius of the sealing ring is smaller than the outer edge radius of the flow blocking block. The ends of the connection pipes away from the communication box are fixedly connected to splicing structures.

[0014] Preferably, the splicing structure includes a clamping plate fixedly connected to the end of the connection pipe away from the communication box. Clamping grooves are evenly opened at the end of the clamping plate away from the communication box. Sliding grooves are evenly opened on the side of the clamping plate away from the communication box. A limit groove is opened on the side of the inner cavity of the sliding groove close to the communication box. A fixing structure is arranged in the inner cavity of the limit groove.

[0015] Preferably, the fixing structure includes threaded rods symmetrically and rotatably connected to the inner cavity of the limiting groove. An extrusion structure is slidably connected to the inner cavity of the clamping plate. The threaded rods penetrate through the extrusion structure and are threadedly connected. The outer surface of the clamping plate is evenly and symmetrically rotatably connected with transmission gears at one end far from the center of the connecting pipe. One side of the threaded rod far from the center of the connecting pipe penetrates through the clamping plate and is fixedly connected to the transmission gear.

[0016] The extrusion structure includes a slider slidably connected to the inner cavity of the limiting groove. One end of the slider far from the clamping plate is fixedly connected to a sealing clamping plate. The threaded rod penetrates through the slider and is threadedly connected. The sealing clamping plate is slidably connected to the sliding groove.

[0017] Preferably, the transmission structure includes a toothed belt rotatably connected to the outer surface of the clamping plate and close to one side of the communicating box on the outer surface of the clamping plate. The toothed belt is evenly fixedly connected with adjusting columns on one side close to the communicating box. One end of the toothed belt far from the adjusting column is meshed with the transmission gear.

[0018] Preferably, the driving structure includes a driving motor fixedly connected to the lower end surface of the communicating box and located on the left side of the limiting gear. The upper end surface of the communicating box is symmetrically fixedly connected with a support assembly with a limiting gear as the center point. A transmission rod is rotatably connected to the inner cavity of the support assembly. The lower part of one side end surface of the clamping plate close to the communicating box is rotatably connected with a driving gear. The driving gear is meshed with the adjusting column.

[0019] Preferably, the transmission rod includes a support block fixedly connected to the middle left side of the lower end surface of the communicating box. A rotating plate is fixedly connected to the lower end surface of the communicating box and located on the right side of the driving motor. Transmission rods are rotatably connected to the inner cavities of the support block and the rotating plate respectively. The rotating shafts on the adjacent sides of the two transmission rods are fixedly connected to the output ends on the left and right sides of the driving motor respectively. The ends of the transmission rods far from the driving motor are respectively fixedly connected to the driving gears located on the left and right sides of the communicating box.

[0020] The present invention has the following beneficial effects:

[0021] 1. Through the commutation structure on the communicating box, the connecting pipe is closed by the flow blocking structure, and through the cooperation of the limiting gear, the locking clamping rod and the locking spring, the rotated flow blocking structure is limited and fixed, ensuring the stability of the closed state of the connecting pipe and preventing accidental opening.

[0022] 2. Through the flow-blocking structure on the commutation structure, when the oil ejection pressure reaches a certain level, the connecting pipe can be connected to allow the normal gushing of oil. Meanwhile, the telescopic rod and the spring can play a buffering and adjusting role to adapt to the oil gushing conditions under different pressures, ensuring the normal operation of the device during oil extraction. Through the splicing structure on the connection structure, connecting pipes of different sizes can be clamped, and the connecting pipe is fixed by extrusion with the sealing splint, ensuring the stable connection of the connecting pipe in the device, preventing the connecting pipe from loosening during operation, and ensuring the sealing and working safety of the device.

[0023] Of course, it is not necessary for any product implementing the present invention to simultaneously achieve all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is the front view three-dimensional structure schematic diagram of the present invention;

[0026] Figure 2 It is the bottom view three-dimensional structure schematic diagram of the present invention;

[0027] Figure 3 It is the left side view three-dimensional structure schematic diagram of the present invention;

[0028] Figure 4 It is the horizontal half-section three-dimensional structure schematic diagram of the present invention;

[0029] Figure 5 It is the horizontal direction half-section three-dimensional structure schematic diagram of the present invention;

[0030] Figure 6 It is the present invention Figure 4 The enlarged structure schematic diagram of area A in;

[0031] Figure 7 It is the present invention Figure 4 The enlarged structure schematic diagram of area B in;

[0032] Figure 8 It is the installation structure schematic diagram of the fixing structure of the present invention.

[0033] In the drawings, the list of components represented by each reference numeral is as follows:

[0034] 1. Connecting box; 2. Reversing structure; 21. Reversing shaft; 22. Reversing wrench; 23. Placing rack; 24. Sealing plate; 3. Flow blocking structure; 31. Telescopic rod; 32. Spring; 33. Flow blocking block; 4. Limiting structure; 41. Transmission shaft; 42. Limiting gear; 43. Locking structure; 431. Locking frame; 432. Locking spring; 433. Locking latch; 5. Connecting structure; 51. Connecting pipe; 52. Sealing ring; 6. Splicing structure; 61. Clamping plate; 62. Clamping groove; 63. Sliding groove; 64. Limiting groove; 7. Fixing structure; 71. Threaded rod; 72. Extrusion structure; 721. Slide block; 722. Sealing clamping plate; 73. Transmission gear; 8. Transmission structure; 81. Toothed belt; 82. Adjusting column; 9. Driving structure; 91. Driving motor; 92. Transmission rod; 93. Support assembly; 931. Support block; 932. Rotating plate; 94. Driving gear. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0036] Please refer to Figure 1-8 As shown in the figure, this embodiment is an adjustable drilling and production well control blowout preventer, including a connecting box 1. A reversing structure 2 is rotatably connected to the middle of the upper end face of the inner cavity of the connecting box 1. A flow blocking structure 3 is arranged in the inner cavity of the reversing structure 2. A limiting structure 4 is arranged at the lower part of the connecting box 1. Connecting structures 5 are fixedly connected to the middle parts of the left and right sides of the connecting box 1. Splicing structures 6 are fixedly connected to the sides of the two connecting structures 5 away from the connecting box 1. A fixing structure 7 is arranged in the inner cavity of the splicing structure 6. A transmission structure 8 is rotatably connected to the outer surface of the splicing structure 6. A driving structure 9 is arranged in the middle of the lower end face of the connecting box 1.

[0037] Furthermore, the reversing structure 2 includes a reversing shaft 21 rotatably connected to the middle of the upper end face of the inner cavity of the connecting box 1. A reversing wrench 22 is rotatably connected to the middle of the upper end face of the connecting box 1. The rotating shaft on the upper end face of the reversing shaft 21 penetrates through the connecting box 1 and is fixedly connected to the reversing wrench 22. A placing rack 23 is fixedly connected to the lower end face of the reversing wrench 22. A sealing plate 24 is fixedly connected to the middle of the left end face of the placing rack 23. A flow blocking structure 3 is fixedly connected to the side of the inner cavity of the placing rack 23 close to the sealing plate 24. Through the reversing structure 2 on the connecting box 1, during use, the flow blocking structure 3 is installed and placed in the placing rack 23, and then the placing rack 23 and the sealing plate 24 are rotated through the reversing wrench 22.

[0038] Further, the flow-blocking structure 3 includes a telescopic rod 31 fixedly connected to the inner cavity of the placement rack 23 near one side of the sealing plate 24. A spring 32 is movably sleeved on the outer surface of the telescopic rod 31. One side of the spring 32 away from the sealing plate 24 is fixedly connected to a flow-blocking block 33. There is a transmission connection of the spring 32 between the flow-blocking block 33 and the sealing plate 24. Through the flow-blocking structure 3 on the commutation structure 2, when the oil eruption pressure reaches a certain level, the connecting pipe can be connected to allow the normal gushing of oil. At the same time, the telescopic movement of the telescopic rod 31 and the spring 32 can play a buffering and adjusting role to adapt to the oil gushing conditions under different pressures, ensuring the normal operation of the device during the oil extraction process.

[0039] Further, the limiting structure 4 includes a transmission shaft 41 fixedly connected to the lower part of the outer surface of the placement rack 23. In the middle of the lower end face of the communication box 1, a limiting gear 42 is fixedly connected. The lower end face of the transmission shaft 41 rotates through the communication box 1 and is fixedly connected to the limiting gear 42. On the lower end face of the communication box 1, a locking structure 43 is fixedly connected to the right side of the limiting gear 42. The connecting pipe is closed by the flow-blocking structure 3, and through the cooperation of the limiting gear 42, the locking rod 433 and the locking spring 432, the rotated flow-blocking structure 3 is limited and fixed, ensuring the stability of the closed state of the connecting pipe and preventing accidental opening.

[0040] The locking structure 43 includes a locking frame 431 fixedly connected to the lower end face of the communication box 1 on the right side of the limiting gear 42. A locking spring 432 is movably sleeved in the inner cavity of the locking frame 431. A locking rod 433 is slidably connected in the inner cavity of the locking frame 431. There is a transmission connection of the locking spring 432 between the locking rod 433 and the locking frame 431. One end of the locking rod 433 close to the limiting gear 42 meshes with the limiting gear 42. Through the connection structure 5 on the communication box 1, the splicing structure 6 is installed and placed during use, and then through the cooperation of the sealing ring 52 and the flow-blocking block 33, the opening and closing of the inner cavity of the commutation shaft 21 are adjusted.

[0041] Further, the connection structure 5 includes connecting pipes 51 respectively fixedly connected to the left and right sides of the communication box 1. Sealing rings 52 are fixedly connected to the side walls of the inner cavities of the connecting pipes 51 close to the communication box 1. The inner cavity radius of the sealing ring 52 is smaller than the outer edge radius of the flow-blocking block 33. One end of the connecting pipe 51 away from the communication box 1 is fixedly connected to a splicing structure 6.

[0042] Furthermore, the splicing structure 6 includes a clamping plate 61 fixedly connected to the end of the connecting pipe 51 far from the communication box 1. The end of the clamping plate 61 far from the communication box 1 is evenly provided with clamping grooves 62. The side of the clamping plate 61 far from the communication box 1 is evenly provided with sliding grooves 63. A limiting groove 64 is provided on the side of the inner cavity of the sliding groove 63 close to the communication box 1. A fixing structure 7 is arranged in the inner cavity of the limiting groove 64. Through the splicing structure 6 on the connecting structure 5, connecting pipes of different sizes can be clamped, and the connecting pipe is squeezed and fixed by the sealing clamping plate 722 to ensure the stable connection of the connecting pipe in the device, prevent the connecting pipe from loosening during the working process, and ensure the sealing performance and working safety of the device.

[0043] Furthermore, the fixing structure 7 includes threaded rods 71 symmetrically and rotatably connected to the inner cavity of the limiting groove 64. An extrusion structure 72 is slidably connected to the inner cavity of the clamping plate 61. The threaded rods 71 penetrate through the extrusion structure 72 and are threadedly connected. The outer surface of the clamping plate 61 is evenly and symmetrically rotatably connected with transmission gears 73 at one end far from the center of the connecting pipe 51. The side of the threaded rod 71 far from the center of the connecting pipe 51 penetrates through the clamping plate 61 and is fixedly connected to the transmission gear 73. Through the fixing structure 7 on the splicing structure 6, the inserted connecting pipe is squeezed and fixed during use, and then the connecting pipes of different sizes can be installed and placed in cooperation with the clamping grooves 62.

[0044] The extrusion structure 72 includes a slider 721 slidably connected to the inner cavity of the limiting groove 64. A sealing clamping plate 722 is fixedly connected to the end of the slider 721 far from the clamping plate 61. The threaded rod 71 penetrates through the slider 721 and is threadedly connected. The sealing clamping plate 722 is slidably connected to the sliding groove 63.

[0045] Furthermore, the transmission structure 8 includes a toothed belt 81 rotatably connected to the outer surface of the clamping plate 61 on the side of the clamping plate 61 close to the communication box 1. A plurality of adjusting columns 82 are fixedly connected to the side of the toothed belt 81 close to the communication box 1. The end of the toothed belt 81 far from the adjusting column 82 meshes with the transmission gear 73. Through the transmission structure 8 on the splicing structure 6, the fixing structure 7 is driven and adjusted during use, and then the driving of the driving structure 9 is transmitted through the adjusting column 82.

[0046] Furthermore, the driving structure 9 includes a driving motor 91 fixedly connected to the lower end surface of the communication box 1 on the left side of the limiting gear 42. Support components 93 are symmetrically fixedly connected to the upper end surface of the communication box 1 with the limiting gear 42 as the center point. A transmission rod 92 is rotatably connected to the inner cavity of the support component 93. A driving gear 94 is rotatably connected to the lower part of the side end face of the clamping plate 61 close to the communication box 1. The driving gear 94 meshes with the adjusting column 82. Through the driving structure 9 on the communication box 1, the transmission structure 8 is driven during use, and then the rotation direction of the toothed belt 81 is adjusted through the driving gear 94.

[0047] Further, the transmission rod 92 includes a support block 931 fixedly connected to the middle left side of the lower end face of the communication box 1. A rotating plate 932 is fixedly connected to the right side of the driving motor 91 on the lower end face of the communication box 1. The transmission rod 92 is rotatably connected to the inner cavities of both the support block 931 and the rotating plate 932. The rotating shafts on the adjacent sides of the two transmission rods 92 are fixedly connected to the output ends on the left and right sides of the driving motor 91 respectively. The ends of the transmission rod 92 far from the driving motor 91 are fixedly connected to the driving gears 94 located on the left and right sides of the communication box 1 respectively.

[0048] Working principle: During operation, the two drilling connection pipes (referred to as connection pipes) are respectively inserted into the inner cavities of the clamping grooves 62 on the left and right sides. At this time, due to the clamping grooves 62 with different radii being formed on the outer surface of the clamping plate 61, different-sized connection pipes can be clamped. Then, the driving structure 9 is started, causing the output end of the driving motor 91 to rotate. Consequently, the transmission rod 92 rotates, and further the driving gear 94 rotates. Since the driving gear 94 meshes with the adjusting column 82, the toothed belt 81 rotates under the push of the driving gear 94. Further, because the toothed belt 81 meshes with the transmission gear 73, the transmission gear 73 rotates, and then the threaded rod 71 rotates. As a result, the slider 721 moves closer to the center of the inner cavity of the clamping plate 61, and the connection pipe is squeezed and fixed by the sealing clamping plate 722.

[0049] When it is necessary to close the connection pipe, the reversing wrench 22 is rotated, causing the reversing shaft 21, the placement rack 23, and the sealing plate 24 to rotate, making the flow-blocking block 33 rotate to the side away from the liquid outlet, thereby closing the connection pipe. At the same time, the limiting gear 42 rotates, further causing the locking latch 433 to slide within the inner cavity of the locking frame 431. Therefore, the locking spring 432 expands and contracts, thereby limiting and fixing the limiting gear 42, and further limiting and fixing the rotated flow-blocking structure 3.

[0050] When the connection pipes are connected, due to the oil pressure during the oil eruption, the flow-blocking block 33 slides, so the telescopic rod 31 expands and contracts, and at the same time the spring 32 expands and contracts, thereby enabling the inner cavity of the communication box 1 to communicate with the connection pipe 51, and thus the oil gushes out.

[0051] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0052] In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, the terms "set", "install", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An adjustable drilling and production well control blowout prevention device, comprising a connecting box (1), characterized in that: A reversing structure (2) is rotatably connected to the middle of the upper end surface of the inner cavity of the connecting box (1), a flow-blocking structure (3) is provided in the inner cavity of the reversing structure (2), a limiting structure (4) is provided at the lower part of the connecting box (1), a connecting structure (5) is fixedly connected to the middle of the left and right sides of the connecting box (1), a splicing structure (6) is fixedly connected to the two connecting structures (5) on the side away from the connecting box (1), a fixing structure (7) is provided in the inner cavity of the splicing structure (6), a transmission structure (8) is rotatably connected to the outer surface of the splicing structure (6), and a driving structure (9) is provided in the middle of the lower end surface of the connecting box (1).

2. The adjustable drilling and production well control blowout prevention device according to claim 1 is characterized in that: The reversing structure (2) comprises a reversing shaft (21) rotatably connected to the upper end surface of the inner cavity of the connecting box (1); a reversing wrench (22) is rotatably connected to the middle of the upper end surface of the connecting box (1); a rotating shaft on the upper end surface of the reversing shaft (21) penetrates the connecting box (1) and is fixedly connected to the reversing wrench (22); a placing rack (23) is fixedly connected to the lower end surface of the reversing wrench (22); a sealing plate (24) is fixedly connected to the middle of the left end surface of the placing rack (23); and a flow blocking structure (3) is fixedly connected to the inner cavity of the placing rack (23) on one side close to the sealing plate (24).

3. The adjustable drilling and production well control blowout prevention device according to claim 1, characterized in that: The flow-blocking structure (3) comprises a telescopic rod (31) fixedly connected to the inner cavity of the placement frame (23) on a side close to the sealing plate (24); a spring (32) is movably sleeved on the outer surface of the telescopic rod (31); a flow-blocking block (33) is fixedly connected to the side of the spring (32) away from the sealing plate (24); and a spring (32) is transmission-connected between the flow-blocking block (33) and the sealing plate (24).

4. The adjustable drilling and production well control blowout prevention device according to claim 1, characterized in that: The limiting structure (4) comprises a transmission shaft (41) fixedly connected to the lower part of the outer surface of the placement frame (23); a limiting gear (42) is fixedly connected to the middle part of the lower end surface of the connecting box (1); a rotating shaft of the lower end surface of the transmission shaft (41) penetrates the connecting box (1) and is fixedly connected to the limiting gear (42); and a locking structure (43) is fixedly connected to the lower end surface of the connecting box (1) located on the right side of the limiting gear (42); The locking structure (43) comprises a locking frame (431) fixedly connected to the lower end surface of the connecting box (1) and located on the right side of the limiting gear (42); a locking spring (432) is movably sleeved in the inner cavity of the locking frame (431); a locking clamping rod (433) is slidably connected in the inner cavity of the locking frame (431); a locking spring (432) is transmission-connected between the locking clamping rod (433) and the locking frame (431); and one end of the locking clamping rod (433) close to the limiting gear (42) is meshed with the limiting gear (42).

5. The adjustable drilling and production well control blowout prevention device according to claim 1 is characterized in that: The connection structure (5) comprises connection pipes (51) respectively fixedly connected to the left and right sides of the connection box (1); a sealing ring (52) is fixedly connected to the inner cavity side wall of the connection pipe (51) on one side close to the connection box (1); the inner cavity radius of the sealing ring (52) is smaller than the outer edge radius of the baffle block (33); and a splicing structure (6) is fixedly connected to the end of the connection pipe (51) away from the connection box (1).

6. The adjustable drilling and production well control blowout prevention device according to claim 1, characterized in that: The splicing structure (6) comprises a clamping plate (61) fixedly connected to one end of the connecting pipe (51) away from the connecting box (1); the clamping plate (61) is evenly provided with clamping grooves (62) at one end away from the connecting box (1); the side of the clamping plate (61) away from the connecting box (1) is evenly provided with sliding grooves (63); the inner cavity of the sliding groove (63) is provided with a limiting groove (64) on a side close to the connecting box (1); and the inner cavity of the limiting groove (64) is provided with a fixing structure (7).

7. The adjustable drilling and production well control blowout prevention device according to claim 1 is characterized in that: The fixing structure (7) comprises a threaded rod (71) symmetrically rotatably connected to the inner cavity of the limiting groove (64); the inner cavity of the clamping plate (61) is slidably connected to an extrusion structure (72); the threaded rod (71) penetrates the extrusion structure (72) and is threadedly connected; one end of the outer surface of the clamping plate (61) away from the center of the connecting tube (51) is evenly symmetrically rotatably connected to a transmission gear (73); the side of the threaded rod (71) away from the center of the connecting tube (51) penetrates the clamping plate (61) and is fixedly connected to the transmission gear (73); The extrusion structure (72) comprises a slider (721) slidably connected to the inner cavity of the limiting groove (64); one end of the slider (721) away from the clamping plate (61) is fixedly connected to a sealing clamp (722); the threaded rod (71) passes through the slider (721) and is threadedly connected; and the sealing clamp (722) is slidably connected to the sliding groove (63).

8. The adjustable drilling and production well control blowout prevention device according to claim 1, characterized in that: The transmission structure (8) comprises a toothed belt (81) rotatably connected to the outer surface of the clamping plate (61) on the side of the outer surface of the clamping plate (61) close to the connecting box (1); an adjustment column (82) is evenly fixedly connected to the side of the toothed belt (81) close to the connecting box (1); and an end of the toothed belt (81) away from the adjustment column (82) is meshed with the transmission gear (73).

9. The adjustable drilling and production well control blowout prevention device according to claim 1, characterized in that: The driving structure (9) comprises a driving motor (91) fixedly connected to the lower end surface of the connecting box (1) and located on the left side of the limiting gear (42); the upper end surface of the connecting box (1) is symmetrically fixedly connected to the supporting assembly (93) with the limiting gear (42) as the center point; the inner cavity of the supporting assembly (93) is rotatably connected to a transmission rod (92); the lower part of the end surface of one side of the clamping plate (61) close to the connecting box (1) is rotatably connected to a driving gear (94); the driving gear (94) and the adjusting column (82) are meshed with each other.

10. The adjustable drilling and production well control blowout prevention device according to claim 1, characterized in that: The transmission rod (92) comprises a support block (931) fixedly connected to the left side of the middle part of the lower end surface of the connecting box (1); the lower end surface of the connecting box (1) is located on the right side of the driving motor (91) and is fixedly connected to a rotating plate (932); the inner cavities of the support block (931) and the rotating plate (932) are both rotatably connected to the transmission rod (92); the rotating shafts on the adjacent sides of the two transmission rods (92) are respectively fixedly connected to the left and right output ends of the driving motor (91); and the ends of the transmission rods (92) away from the driving motor (91) are respectively fixedly connected to the driving gears (94) located on the left and right sides of the connecting box (1).

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