A blowout preventer box for drilling operations

Abstract

The utility model relates to a drilling and mining process is with prevent spouting box technical field especially, a kind of prevent spouting box for drilling and mining process. Including first prevent spouting box, the side surface of first prevent spouting box is hinged with second prevent spouting box, the bottom end arc surface of first prevent spouting box is fixedly connected with discharge pipe, the upper end surface of first prevent spouting box and second prevent spouting box is all set up with a plurality of mounting holes, the position of the corresponding mounting hole of first prevent spouting box and second prevent spouting box upper surface abuts with mounting plate, the surface of mounting plate is set up with through hole, the position of through hole corresponds with the position of mounting hole, the both end surface of second prevent spouting box is rotatably connected with rotating shaft, the inner wall of two rotating shafts is rotatably connected with same limit frame. The prevent spouting box for drilling and mining process provided by the utility model has the advantages of greatly improving the response speed of second-level opening and closing and locking of prevent spouting box under emergency working condition and daily operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of blowout preventer technology for drilling and production, and in particular to a blowout preventer for drilling and production processes. Background Technology

[0002] In oil drilling and production operations, especially when running drill pipe or tubing, or operating in high-pressure oil and gas wells, drilling fluid, crude oil, or natural gas often erupts from the wellbore along the annular space between the tubing string and the wellhead. This not only wastes resources and pollutes the environment but also poses a serious threat to the lives of wellhead operators and contaminates the work site. A blowout preventer (BOP) is one of the key pieces of equipment for solving these problems. It is typically installed above the blowout preventer or Christmas tree to enclose the tubing string and seal its annular space.

[0003] Existing technologies, such as the utility model patent with publication number CN203081389U, disclose a novel drilling mud blowout prevention and diversion device. This patent includes a support column, a clamping cylinder, a diversion pipe, a right rubber tube, a left rubber tube, and a housing. The housing contains the right and left rubber tubes, and a diversion pipe is located on one side of the housing. The right and left rubber tubes are sealed by meshing teeth. The clamping cylinder is located on the outer wall of the housing to clamp and seal the right and left rubber tubes. The support column is located outside the housing to fix the housing to the drill table. The advantages are: the use of two integral semi-circular rubber tubes effectively solves the sealing problem between the original rubber tubes and the drill rod; furthermore, it enables pneumatic opening and closing of the rubber tubes, eliminating the need for a hoist for lifting, and allowing one person to perform the rotation and clamping operations, simplifying the lifting process.

[0004] During oil drilling and production operations, it was found that because most blowout preventers (BOPs) are either integral or two semi-circular structures connected by multiple bolts, integral BOPs need to be inserted from the top of the tubing string during installation, which is extremely inconvenient and cannot be quickly activated in emergency situations. While bolt-connected BOPs solve the problem of integral installation, multiple bolts need to be tightened one by one during locking, which is cumbersome, time-consuming, and labor-intensive, and can easily lead to slow response times in situations where rapid emergency shutdown of the well is required. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies where blowout preventers (BOPs) typically employ an integral structure or two semi-circular structures connected by multiple bolts. Integral BOPs require insertion from the top of the tubing string, making installation extremely inconvenient and hindering rapid activation in emergencies. While bolt-connected BOPs solve the overall installation problem, tightening requires individual bolts, which is cumbersome, time-consuming, and labor-intensive, resulting in slow response times in situations requiring rapid emergency shutdown of the drilling rig.

[0006] To solve the above-mentioned technical problems, this utility model provides a blowout preventer (BOP) for drilling and production processes, comprising: a first BOP; a second BOP hinged to one side surface of the first BOP; a discharge pipe fixedly connected to the bottom arc surface of the first BOP; several mounting holes formed on the upper surfaces of both the first and second BOPs; mounting plates abutting against the positions of the mounting holes on the upper surfaces of the first and second BOPs; through holes formed on the surface of the mounting plates, the positions of the through holes corresponding to the positions of the mounting holes; rotating shafts rotatably connected to both ends of the second BOP; a same limiting frame rotatably connected to the inner walls of the two rotating shafts; and limiting blocks fixedly connected to the arc surfaces of both ends of the first BOP, the limiting blocks having an "L"-shaped cross-section, the cross-sectional dimensions of the limiting blocks matching the cross-sectional dimensions of the limiting frames.

[0007] The aforementioned components achieve the following effects: the hinged connection between the first and second blowout preventer (BOP) boxes enables rapid opening and closing, facilitating the wrapping or clearing of drill pipe, tubing, and other pipelines, significantly improving installation and maintenance efficiency. The bottom drain pipe safely guides overflowing mud mixture. The upper mounting plate and through-hole structure ensure stable mounting of the BOP box above the wellhead equipment, allowing for accurate and convenient installation. By rotating the limiting frame and engaging it in the "L"-shaped limiting block, rapid locking and unlocking of the two half-boxes is achieved. The structure is simple and reliable, requiring minimal effort to operate, and ensuring the stability and sealing of the BOP box closure under high-pressure conditions.

[0008] Preferably, both ends of the inner walls of the first and second pop preventers are provided with inlay grooves. The inner wall of the first pop preventer is slidably connected to a mating ring via the inlay groove, and the inner wall of the second pop preventer is slidably connected to a connecting ring via the inlay groove.

[0009] The above-mentioned components achieve the following effects: the inlay groove enables modular and replaceable installation of the mating ring and the connecting ring, eliminating the need for permanent fixing. After wear, they can be easily disassembled and replaced individually, reducing maintenance costs and difficulties. This structure provides a basic carrier for subsequent sealing and docking.

[0010] Preferably, the cross-sections of the mating ring and the connecting ring are "C" shaped, and both the mating ring and the connecting ring are rubber rings.

[0011] The aforementioned components achieve the following effects: the "C"-shaped cross-section provides them with a certain degree of elasticity and deformation capacity, allowing them to better fill gaps when compressed. The use of rubber material gives the mating ring and connecting ring excellent elasticity, sealing properties, and wear resistance, effectively adapting to the shape of the tubing and tightly wrapping it, thereby forming a reliable pressure seal inside the blowout preventer box and preventing fluid leakage from the joint between the two halves of the box.

[0012] Preferably, slots are provided on both ends of the docking ring, and plugs are fixedly connected to both ends of the connecting ring, wherein the cross-sectional dimensions of the slots are adapted to the cross-sectional dimensions of the plugs.

[0013] The aforementioned components achieve the following effect: when the first and second blowout preventers are closed, the insert on the connecting ring precisely inserts into the slot on the mating ring, allowing the two independent mating rings to seamlessly engage with the connecting ring upon closure, forming a continuous and complete annular seal. This effectively eliminates the seam between the two halves of the ring, significantly improving the sealing reliability at the joint and preventing high-pressure fluid from leaking out from the middle.

[0014] Preferably, the upper arc surfaces of both the first and second popout preventers are fixedly connected to a tie rod, and the tie rod has a U-shaped cross-section.

[0015] The aforementioned components achieve the following effect: the "U"-shaped lever, as a user-friendly operating component, provides operators with a convenient and reliable point of force application. When it is necessary to open or move the poppet box, operators can easily grasp the lever to operate it, saving effort and ensuring safety, thus improving the operating experience.

[0016] Preferably, the first and second pop-out preventers have semi-circular cross-sections and are made of stainless steel.

[0017] The aforementioned components achieve the following effects: the semi-circular cross-section design allows them to be perfectly combined into a complete circular cavity, matching cylindrical tubing such as drill pipes and tubing, providing uniform wrapping and sealing; the use of stainless steel gives the blowout preventer box extremely high strength to withstand internal fluid pressure, while also possessing excellent corrosion resistance, wear resistance, and rust resistance.

[0018] Compared with related technologies, the blowout preventer box for drilling and production provided by this utility model has the following beneficial effects: This invention provides a blowout preventer (BOP) for drilling and production processes. Firstly, through a hinged design between the first and second BOPs, combined with a quick-locking mechanism using a limiting frame and an L-shaped limiting block, the BOPs can be opened, closed, and locked rapidly. Compared to traditional integral or bolt-fixed BOPs, this structure greatly simplifies the operation process, significantly saving time, improving work efficiency, and reducing the labor intensity of workers when dealing with emergencies such as blowouts or performing routine maintenance. Secondly, by incorporating slidable mating rings and connecting rings on the inner wall, and using "C"-shaped rubber material and a block-slot mating method, a highly efficient and reliable sealing system is formed. Compared to existing integral seals or planar mating seals, this design creates a seamless, complete annular seal when the two halves of the blowout preventer are closed, effectively eliminating leakage points on the mating surface and providing better sealing performance, especially suitable for high-pressure conditions. Simultaneously, the modular design of the mating rings and connecting rings makes maintenance and replacement exceptionally simple, eliminating the need to replace the entire blowout preventer body and significantly reducing subsequent maintenance costs. In addition, the use of stainless steel gives the equipment excellent corrosion resistance and high strength, extending its service life; the "U"-shaped tie rod design provides a user-friendly operating point, improving operational safety and convenience; and the discharge pipe at the bottom can effectively guide overflow, enhancing operational safety. Attached Figure Description

[0019] Figure 1 This utility model provides a structural schematic diagram of a blowout preventer box for drilling and production processes; Figure 2 for Figure 1 A partial structural diagram of the three-dimensional structure shown; Figure 3 for Figure 1 The diagram shows the internal structure of the three-dimensional structure shown. Figure 4 for Figure 3 The enlarged structural diagram at point A is shown.

[0020] The following are the labels in the diagram: 1. First BOP; 2. Second BOP; 3. Rotating shaft; 4. Limit frame; 5. Limit block; 6. Pull rod; 7. Exhaust pipe; 8. Connecting ring; 9. Connecting ring; 10. Slot; 11. Insert block; 12. Inlay groove; 13. Mounting plate; 14. Through hole; 15. Mounting hole. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0023] Please see Figures 1 to 4This utility model provides a blowout preventer for drilling and production processes, comprising: a first blowout preventer 1, a second blowout preventer 2 hinged to one side surface of the first blowout preventer 1, a discharge pipe 7 fixedly connected to the bottom arc surface of the first blowout preventer 1, a plurality of mounting holes 15 formed on the upper surface of both the first blowout preventer 1 and the second blowout preventer 2, mounting plates 13 abutting against the positions of the mounting holes 15 on the upper surfaces of the first blowout preventer 1 and the second blowout preventer 2, through holes 14 formed on the surface of the mounting plates 13, the positions of the through holes 14 corresponding to the positions of the mounting holes 15, rotating shafts 3 rotatably connected to both ends of the second blowout preventer 2, the same limiting frame 4 rotatably connected to the inner walls of the two rotating shafts 3, and limiting blocks 5 fixedly connected to both ends of the arc surface of the first blowout preventer 1, the cross-section of the limiting blocks 5 being "L" shaped, and the cross-sectional dimensions of the limiting blocks 5 being adapted to the cross-sectional dimensions of the limiting frame 4.

[0024] In the embodiments of this utility model, please refer to Figure 2 , Figure 3 and Figure 4 Both ends of the inner walls of the first popout preventer box 1 and the second popout preventer box 2 are provided with inlay grooves 12. The inner wall of the first popout preventer box 1 is slidably connected to a mating ring 8 through the inlay groove 12, and the inner wall of the second popout preventer box 2 is slidably connected to a connecting ring 9 through the inlay groove 12. The cross-section of the mating ring 8 and the connecting ring 9 is "C" shaped. Both the mating ring 8 and the connecting ring 9 are rubber rings. Both ends of the mating ring 8 are provided with slots 10. Both ends of the connecting ring 9 are fixedly connected with inserts 11. The cross-sectional dimensions of the slots 10 and the inserts 11 are adapted to each other. The upper arc surfaces of the first popout preventer box 1 and the second popout preventer box 2 are fixedly connected with pull rods 6. The cross-section of the pull rods 6 is "U" shaped. The cross-sections of the first popout preventer box 1 and the second popout preventer box 2 are semi-circular. The first popout preventer box 1 and the second popout preventer box 2 are stainless steel boxes. The working principle of the blowout preventer provided by this utility model for drilling and production is as follows: During the drilling and production of oil, when the first blowout preventer 1 and the second blowout preventer 2 are in the open state, the limiting frame 4 is rotated out from the "L"-shaped limiting block 5 on the first blowout preventer 1. At this time, the drill pipe or tubing can be conveniently put into the open blowout preventer from the side.

[0025] When sealing is required, the operator holds the U-shaped lever 6 and rotates the second blowout preventer 2 around the hinge point, closing it with the first blowout preventer 1 to form a complete cylindrical cavity enclosing the tubing. Subsequently, the retaining frame 4 located on the second blowout preventer 2 is rotated to both ends of the first blowout preventer 1 and engages with the short side of the L-shaped retaining block 5. This locking mechanism utilizes the L-shaped structure; when subjected to upward or outward pressure from the internal fluid, the retaining frame 4 is locked within the retaining block 5, tightening with increasing pressure, thus ensuring that the two boxes will not accidentally spring open under high pressure, achieving rapid and reliable locking.

[0026] During the closing process, the insert 11 on the connecting ring 9 on the inner wall of the second blowout preventer 2 precisely inserts into the slot 10 on the mating ring 8 on the inner wall of the first blowout preventer 1. This allows the two independent "C"-shaped rubber mating rings 8 and connecting rings 9 to perfectly align, forming a continuous, seamless, and complete annular seal. When the wellhead pressure increases and fluid attempts to leak from the gap between the tubing string and the inner wall of the blowout preventer, the pressure acts on the rubber mating rings 8 and connecting rings 9, causing them to elastically expand and thus more tightly wrap around the outer wall of the tubing string, achieving an active, self-tightening seal. Overflowing drilling fluid or crude oil is sealed within the cavity and eventually safely guided away from the work area through the bottom discharge pipe 7, ensuring the safety and cleanliness of the operating platform.

[0027] When the work is completed or maintenance is required, simply unscrew the limit frame 4 from the limit block 5 to open the popper box. If the mating ring 8 and connecting ring 9 are worn and need to be replaced, they can be slid out directly from the insert groove 12 and replaced with new parts, making maintenance simple and quick.

[0028] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A blowout preventer for drilling and production processes, characterized in that, include: A first blowout preventer (1) is hinged to one side surface of the first blowout preventer (1), and a discharge pipe (7) is fixedly connected to the bottom arc surface of the first blowout preventer (1). Several mounting holes (15) are provided on the upper surfaces of both the first blowout preventer (1) and the second blowout preventer (2). Mounting plates (13) abut against the upper surfaces of the first blowout preventer (1) and the second blowout preventer (2) at positions corresponding to the mounting holes (15). A through-hole is provided on the surface of the mounting plate (13). Through hole (14), the position of the through hole (14) corresponds to the position of the mounting hole (15), both ends of the second blowout preventer (2) are rotatably connected to rotating shafts (3), the inner walls of the two rotating shafts (3) are rotatably connected to the same limiting frame (4), both ends of the first blowout preventer (1) are fixedly connected to limiting blocks (5), the cross section of the limiting block (5) is "L" shaped, and the cross section size of the limiting block (5) is adapted to the cross section size of the limiting frame (4).

2. A blowout preventer for drilling and production processes according to claim 1, characterized in that, Both ends of the inner walls of the first blowout preventer (1) and the second blowout preventer (2) are provided with inlay grooves (12). The inner wall of the first blowout preventer (1) is slidably connected to a mating ring (8) through the inlay groove (12), and the inner wall of the second blowout preventer (2) is slidably connected to a connecting ring (9) through the inlay groove (12).

3. A blowout preventer for drilling and production processes according to claim 2, characterized in that, The cross-sections of the docking ring (8) and the connecting ring (9) are "C" shaped, and both the docking ring (8) and the connecting ring (9) are rubber rings.

4. A blowout preventer for drilling and production processes according to claim 2, characterized in that, The two ends of the docking ring (8) are provided with slots (10), and the two ends of the connecting ring (9) are fixedly connected with plugs (11). The cross-sectional dimensions of the slots (10) are adapted to the cross-sectional dimensions of the plugs (11).

5. A blowout preventer for drilling and production processes according to claim 1, characterized in that, Both the first blowout preventer (1) and the second blowout preventer (2) have a tie rod (6) fixedly connected to their upper arc surfaces. The tie rod (6) has a U-shaped cross section.

6. A blowout preventer for drilling and production processes according to claim 1, characterized in that, The first blowout preventer (1) and the second blowout preventer (2) have semi-circular cross-sections, and the first blowout preventer (1) and the second blowout preventer (2) are stainless steel boxes.

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