A choke and kill manifold for offshore oil production with pressure regulating function

Abstract

The application discloses a throttling well killing manifold with pressure regulating function for offshore oil exploitation, and relates to the technical field of well killing manifolds. The throttling well killing manifold comprises a base, a four-way structure, a filtering device, a throttling device, an external connecting pipe, a liquid injection structure and a damping support. The filter hole size of the filter plate can be dynamically adjusted according to the sandstone content in oil and gas. When the sandstone content is high, the filter hole size is shrunk to realize more fine filtering effect. When the sandstone content is low, the filter hole size is increased to improve the passing amount of fluid, reduce the pressure loss caused by the increase of filter resistance, prolong the service life of the filter screen, and automatically adjust the opening degree of the throttling valve according to the pressure in the pipeline. The fluid flow keeps stable. When the pressure in the pipeline sharply rises due to abnormal conditions, the throttling valve is automatically closed to cut off the fluid passage of the pipeline, and the pressure relief device is opened to release part of the excessively high pressure, so that the pressure in the pipeline rapidly falls back to the safety range.

Description

Technical Field

[0001] This invention relates to the field of well control manifold technology, specifically a throttling well control manifold for offshore oil development with pressure regulation function. Background Technology

[0002] Choke and kill manifolds are essential equipment for controlling well kicks and implementing oil and gas well pressure control technology. When the blowout preventer is closed, the choke and kill manifold uses the opening and closing of the choke valve to control a certain casing pressure, so that the bottom hole pressure is always slightly higher than the formation pressure. The choke and kill manifold prevents formation fluids from flowing into the well. In addition, when the choke and kill manifold is used for well shut-in, it can be used to release pressure and achieve soft shut-in. When the choke and kill manifold reaches a certain limit, the wellhead is released through the choke and kill manifold to protect the wellhead.

[0003] Existing technologies have shortcomings: During offshore oil extraction, oil and gas usually contain impurities such as mud, sand, and water. Sand and gravel can easily damage extraction equipment and increase extraction costs. When the pressure in the pipeline increases, it is difficult to adjust the pipeline pressure in time. Excessive pressure can cause pipeline deformation and leakage, affecting normal operation. Summary of the Invention

[0004] The purpose of this invention is to provide a pressure-regulating manifold for offshore oil development using throttling and kill manifolds, in order to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The choke and kill manifold includes a base, on which a four-way structure is installed. A filter, a choke device, and an external connector are sequentially installed on one side of the four-way structure. A fluid injection structure is installed at one end of the four-way structure. A vibration damping bracket is installed at one end of the filter, choke device, external connector, and fluid injection structure, and the vibration damping bracket is mounted on the base. During operation, oil and gas flow through the four-way structure to the filter, which filters and discharges impurities such as sand and gravel from the oil and gas. The filtered oil and gas then enters the choke device, which regulates the pressure within the pipeline, and finally flows out through the external connector. The fluid injection structure is used to inject drilling fluid into the wellhead to maintain pressure balance.

[0006] The filtration device includes a filter tube, one end of which is mounted on a vibration damping bracket. The filter tube is installed between a four-way structure and a throttling device. A first protective box is installed on the outside of the filter tube. A sand collecting pipe is installed on the filter tube. A sand discharge pipe is installed on one side of the sand collecting pipe. A sand filtering device is installed inside the filter tube. The sand collecting pipe is located inside the first protective box. A recycling box is installed at one end of the sand discharge pipe.

[0007] The sand filtering device includes a first filter plate and a second filter plate, which are installed inside a filter tube. A first rotating shaft is rotatably connected to the first and second filter plates. A first scraper, a drain fan, and a second scraper are mounted on the first rotating shaft. The first scraper abuts against one end of the first filter plate, and a sealing ring is rotatably connected to the other end of the first filter plate. A third filter plate is installed inside the sealing ring, and a sector gear is connected to the third filter plate. The second scraper abuts against one end of the second filter plate. When oil and gas flow into the filter tube, large impurities such as sand and gravel in the oil and gas are blocked by the first filter plate, while small impurities such as dust are blocked by the second filter plate. The oil and gas drive the drain fan to rotate, which in turn drives the first rotating shaft to rotate. The first rotating shaft then drives the first and second scrapers to rotate. The first scraper scrapes off impurities from the surface of the first filter plate, and the second scraper scrapes off impurities from the surface of the second filter plate. The rotation of the drain fan generates centrifugal force, which throws large impurities such as sand and gravel against the tube wall and accumulates in the outer shell.

[0008] The sand collecting pipe includes an outer shell, which is mounted on the filter pipe. The sand discharge pipe is mounted on one side of the outer shell. A cylindrical slider is slidably connected inside the sand discharge pipe. A guide post is mounted on one end of the cylindrical slider. A spring is mounted on one side of the cylindrical slider. The other end of the spring is mounted on the outer shell and is sleeved on the guide post. A connecting post is mounted on the guide post. A first connecting rod is rotatably connected to the connecting post. A second connecting rod is rotatably connected to one end of the first connecting rod. A second rotating shaft is rotatably connected to one end of the second connecting rod. One end of the second rotating shaft is rotatably connected to the outside of the outer shell. A first gear is mounted on one end of the second rotating shaft. The first gear meshes with a sector gear. When sand and gravel accumulate in the outer casing, they press the cylindrical slider against the spring, causing it to slide closer to the spring. The slider moves the guide post, which in turn moves the connecting post. The connecting post rotates the first connecting rod, which in turn rotates the second connecting rod. The second connecting rod rotates the second rotating shaft, which in turn rotates the first gear. The first gear rotates the sector gear, which in turn rotates the third filter plate and the sealing ring. The filter holes of the third filter plate partially cover the filter holes of the first filter plate, achieving a finer filtration effect. When the cylindrical slider... When the sand discharge pipe is below, large impurities such as sand and gravel flow from the sand discharge pipe into the recovery box. When the amount of large impurities such as sand and gravel decreases, the spring stretches and drives the cylindrical slider to slide away from the spring in the outer shell. The cylindrical slider drives the guide column to move, the guide column drives the connecting column to move, the connecting column drives the first connecting rod to reverse, the first connecting rod drives the second connecting rod to reverse, the second connecting rod drives the second rotating shaft to reverse, the second rotating shaft drives the first gear to reverse, the first gear drives the sector gear to reverse, and the sector gear drives the third filter plate and the sealing ring to reverse, increasing the size of the filter holes of the first filter plate.

[0009] The throttling device includes a throttling tube, one end of which is mounted on a four-way structure, and the other end of which is mounted on a throttling valve. One end of the throttling valve is mounted on an external connecting pipe, and a second protective box is mounted on the outside of the throttling valve. A connecting pipe is mounted on the throttling tube, and a bellows is mounted on the connecting pipe. A diaphragm is installed between the bellows and the connecting pipe. The bellows is filled with inert gas. A first rack is mounted on one end of the bellows, a pressure regulating device is mounted on one side of the first rack, a second rack is connected to one side of the first rack, and a pressure relief device is mounted on one side of the second rack. The pressure regulating device and the pressure relief device are mounted on the inner wall of the second protective box. When the pressure in the throttling tube increases, the oil and gas will impact the diaphragm, causing the diaphragm to deform under pressure and transfer the pressure to the inert gas, preventing corrosive media from directly contacting the bellows. The increased pressure in the bellows causes the bellows to expand, moving the first rack away from the connecting pipe, and the first rack then moves the second rack.

[0010] The pressure regulating device includes a fixed plate mounted on the inner wall of the second protective box. A third rotating shaft is rotatably connected to the fixed plate. One end of the third rotating shaft rotates on the inner wall of the second protective box, and the other end is equipped with a first bevel gear. A second bevel gear is mounted on the drive shaft of the throttle valve. The first and second bevel gears mesh. A second gear is mounted on the third rotating shaft, and the second gear meshes with a first rack. When the pressure in the throttle pipe increases, the first rack drives the second gear to rotate, which in turn drives the third rotating shaft to rotate. The third rotating shaft then drives the first bevel gear to rotate, which in turn drives the second bevel gear to rotate. The second bevel gear then drives the drive shaft of the throttle valve to rotate, causing the valve opening to decrease. This reduces the cross-sectional area through which oil and gas pass, decreases the flow rate, and causes the pipeline pressure to drop, thus maintaining a stable oil and gas flow and ensuring that the pressure of the pipeline system is maintained at a stable and safe level.

[0011] The pressure relief device includes a fixed column, one end of which is installed on the inner wall of the second protective box. A third gear is rotatably connected to the fixed column, and a fourth gear is installed on one side of the third gear. The third gear meshes with a second rack. A fourth rotating shaft is rotatably connected to the inner wall of the second protective box, and a fifth gear is installed on the fourth rotating shaft. A belt is installed on the fourth and fifth gears. A pressure relief pipe is installed on the throttling pipe, and a rotating plate is installed inside the pressure relief pipe. A fifth rotating shaft is installed on the rotating plate, and the fifth rotating shaft is installed on the fourth rotating shaft. A buffer pipe is installed at one end of the pressure relief pipe. When an abnormal situation occurs that causes a sharp increase in pressure in the throttling tube, the second rack meshes with the third gear. The second rack drives the third gear to rotate, the third gear drives the fourth gear to rotate, the fourth gear drives the belt to rotate, the belt drives the fifth gear to rotate, the fifth gear drives the fourth shaft to rotate, the fourth shaft drives the fifth shaft to rotate, and the fifth shaft drives the rotating plate to rotate. The high-pressure oil and gas flow out from the pressure relief pipe into the buffer pipe. The spiral pipe of the buffer pipe can reduce the impact force of the high-pressure oil and gas and reduce the impact on the base.

[0012] The filter holes of the third filter plate are located in positions corresponding to those of the first filter plate, and the filter hole size of the second filter plate is smaller than that of the first filter plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The filtration device of the present invention can dynamically adjust the filter pore size of the filter plate according to the sand and gravel content in the oil and gas. When the sand and gravel content in the oil and gas is high, the filter pore size is reduced to achieve a finer filtration effect, effectively intercepting larger particles and preventing sand and gravel from clogging the pipeline or causing wear to downstream equipment. When the sand and gravel content in the oil and gas is low, the filter pore size is increased, thereby increasing the fluid throughput, reducing the pressure loss caused by increased filtration resistance, and also reducing the burden on the filter medium, thereby extending the service life of the filter screen.

[0015] 2. The throttling device of the present invention can automatically adjust the opening of the throttling valve according to the pressure in the pipeline. When the pipeline pressure is within the normal range, the device will automatically adjust the pipeline pressure to keep the fluid flow stable and ensure that the pressure of the pipeline system is maintained at a stable and safe level. When an abnormal situation occurs and the pressure in the pipeline rises sharply, the throttling valve will automatically close to cut off the fluid passage in the pipeline. At the same time, the pressure relief device will be opened to release some of the excessive pressure, so that the pressure in the pipeline will quickly drop back to a safe range, thereby effectively preventing damage to the pipeline and related equipment due to excessive pressure.

[0016] 3. The pressure regulation and filtration technology of this invention adopts a purely mechanical structure and does not use electronic control such as sensors. This avoids the failure problems caused by corrosion interference of electronic components under deep-sea high-pressure conditions. The failure rate in extreme environments is greatly reduced, and the operation is more stable and reliable. At the same time, the purely mechanical system has a simple structure and is easy to maintain. It does not require additional power support and can ensure rapid response to pressure changes at critical moments, timely adjustment of the filtration status, and protection of pipelines and downstream equipment. Attached Figure Description

[0017] Figure 1 This is a perspective view of the throttling and kill manifold of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of the filtration device of the present invention;

[0019] Figure 3 This is a perspective view of the sand filtering device of the present invention;

[0020] Figure 4 This is a schematic diagram of the internal structure of the sand collecting pipe of the present invention;

[0021] Figure 5 This is a schematic diagram of the internal structure of the throttling device of the present invention. Figure 1 ;

[0022] Figure 6 This is a schematic diagram of the internal structure of the connecting tube of the present invention;

[0023] Figure 7 This is a schematic diagram of the internal structure of the throttling device of the present invention. Figure 2 .

[0024] In the diagram: 1. Base; 2. Four-way structure; 3. Filter device; 31. First protective box; 32. Filter tube; 33. Sand filtering device; 331. First filter plate; 332. First scraper; 333. Sealing ring; 334. First rotating shaft; 335. Drain fan; 336. Second filter plate; 337. Second scraper; 338. Sector gear; 34. Sand collecting pipe; 341. Outer shell; 342. Cylindrical slider; 343. Guide column; 344. Spring; 345. First connecting rod; 346. Second connecting rod; 347. First gear; 35. Sand discharge pipe; 4 41. Throttling device; 42. Second protective box; 43. Throttling valve; 44. Throttling pipe; 45. Diaphragm; 46. Bellows; 47. First rack; 48. Second rack; 49. Pressure regulating device; 40. Fixing plate; 41. Third rotating shaft; 42. Second gear; 43. First bevel gear; 44. Second bevel gear; 45. Pressure relief device; 46. Third gear; 47. Fourth gear; 48. Belt; 49. Fifth gear; 40. Pressure relief pipe; 41. Buffer pipe; 42. External pipe; 49. Liquid injection structure; 40. Vibration damping bracket. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example: Figures 1-7 As shown, the present invention provides a technical solution for a choke and kill manifold, comprising a base 1, on which a four-way structure 2 is mounted. A filter device 3, a choke device 4, and an external pipe 5 are sequentially mounted on one side of the four-way structure 2. A fluid injection structure 6 is mounted at one end of the four-way structure 2. A vibration damping bracket 7 is mounted at one end of the filter device 3, the choke device 4, the external pipe 5, and the fluid injection structure 6, and is mounted on the base 1. During operation, oil and gas flow through the four-way structure 2 into the filter device 3, which filters and discharges impurities such as sand and gravel from the oil and gas. The filtered oil and gas then enters the choke device 4, which regulates the pressure within the pipeline, and finally flows out through the external pipe 5. The fluid injection structure 6 is used to inject drilling fluid into the wellhead to maintain pressure balance.

[0027] The filter device 3 includes a filter tube 32, one end of which is mounted on the vibration damping bracket 7. The filter tube 32 is installed between the four-way structure 2 and the throttling device 4. A first protective box 31 is installed on the outside of the filter tube 32. A sand collecting pipe 34 is installed on the filter tube 32. A sand discharge pipe 35 is installed on one side of the sand collecting pipe 34. A sand filtering device 33 is installed inside the filter tube 32. The sand collecting pipe 34 is located inside the first protective box 31. A recycling box is installed at one end of the sand discharge pipe 35.

[0028] The sand filtration device 33 includes a first filter plate 331 and a second filter plate 336. The first filter plate 331 and the second filter plate 336 are installed inside the filter tube 32. A first rotating shaft 334 is rotatably connected to the first filter plate 331 and the second filter plate 336. A first scraper 332, a drain fan 335, and a second scraper 337 are installed on the first rotating shaft 334. The first scraper 332 abuts against one end of the first filter plate 331. A sealing ring 333 is rotatably connected to the other end of the first filter plate 331. A third filter plate is installed inside the sealing ring 333. A sector gear 338 is connected to the third filter plate. The second scraper 337 abuts against one end of the second filter plate 336. The filter hole positions of the third filter plate correspond to the filter hole positions of the first filter plate 331. The filter hole size of the second filter plate 336 is smaller than the filter hole size of the first filter plate 331.

[0029] When oil and gas flow into the filter pipe 32, large impurities such as sand and gravel in the oil and gas are blocked by the first filter plate 331, and small impurities such as dust are blocked by the second filter plate 336. The oil and gas drive the drain fan 335 to rotate, the drain fan 335 drives the first rotating shaft 334 to rotate, the first rotating shaft 334 drives the first scraper 332 and the second scraper 337 to rotate. The first scraper 332 scrapes off the impurities on the surface of the first filter plate 331, and the second scraper 337 scrapes off the impurities on the surface of the second filter plate 336. When the drain fan 335 rotates, it will generate centrifugal force. Under the action of centrifugal force, large impurities such as sand and gravel are thrown towards the pipe wall and accumulate in the outer shell 341.

[0030] The sand collecting pipe 34 includes a housing 341, which is mounted on the filter pipe 32. The sand discharge pipe 35 is mounted on one side of the housing 341. A cylindrical slider 342 is slidably connected inside the sand discharge pipe 35. A guide post 343 is mounted on one end of the cylindrical slider 342. A spring 344 is mounted on one side of the cylindrical slider 342. The other end of the spring 344 is mounted on the housing 341 and is sleeved on the guide post 343. A connecting post is mounted on the guide post 343. A first connecting rod 345 is rotatably connected to the connecting post. A second connecting rod 346 is rotatably connected to one end of the first connecting rod 345. A second rotating shaft is rotatably connected to one end of the second connecting rod 346. One end of the second rotating shaft is rotatably connected to the outside of the housing 341. A first gear 347 is mounted on one end of the second rotating shaft. The first gear 347 meshes with a sector gear 338.

[0031] When sand and gravel accumulate in the outer casing 341, they press the cylindrical slider 342 and cause it to slide closer to the spring 344 within the casing 341. The cylindrical slider 342 drives the guide post 343 to move, which in turn drives the connecting post to move. The connecting post then drives the first connecting rod 345 to rotate, which in turn drives the second connecting rod 346 to rotate. The second connecting rod 346 then drives the second rotating shaft to rotate, which in turn drives the first gear 347 to rotate. The first gear 347 then drives the sector gear 338 to rotate, which in turn drives the third filter plate and the sealing ring 333 to rotate. The filter holes of the third filter plate partially cover the filter holes of the first filter plate 331 to achieve a finer filtration effect. When the cylindrical slider 342 is located at... When the sand discharge pipe 35 is below, large impurities such as sand and gravel flow from the sand discharge pipe 35 into the recovery box. When the amount of large impurities such as sand and gravel decreases, the spring 344 stretches and drives the cylindrical slider 342 to slide away from the spring 344 in the outer shell 341. The cylindrical slider 342 drives the guide column 343 to move, the guide column 343 drives the connecting column to move, the connecting column drives the first connecting rod 345 to reverse, the first connecting rod 345 drives the second connecting rod 346 to reverse, the second connecting rod 346 drives the second rotating shaft to reverse, the second rotating shaft drives the first gear 347 to reverse, the first gear 347 drives the sector gear 338 to reverse, the sector gear 338 drives the third filter plate and sealing ring 333 to reverse, increasing the size of the filter holes of the first filter plate 331.

[0032] The throttling device 4 includes a throttling pipe 43, one end of which is mounted on the four-way structure 2, and the other end of which is mounted on a throttling valve 42. One end of the throttling valve 42 is mounted on an external pipe 5, and a second protective box 41 is mounted on the outside of the throttling valve 42. A connecting pipe is mounted on the throttling pipe 43, and a bellows 45 is mounted on the connecting pipe. A diaphragm 44 is installed between the bellows 45 and the connecting pipe. The bellows 45 is filled with inert gas. A first rack 46 is mounted on one end of the bellows 45, a pressure regulating device 48 is mounted on one side of the first rack 46, a second rack 47 is connected to one side of the first rack 46, and a pressure relief device 49 is mounted on one side of the second rack 47. The pressure regulating device 48 and the pressure relief device 49 are mounted on the inner wall of the second protective box 41. When the pressure in the throttling pipe 43 increases, the oil and gas will impact the diaphragm 44, causing the diaphragm 44 to deform under pressure and transfer the pressure to the inert gas, preventing the corrosive medium from directly contacting the bellows 45. The pressure in the bellows 45 increases, and the bellows 45 expands, causing the first rack 46 to move away from the connecting pipe. The first rack 46 then drives the second rack 47 to move.

[0033] The pressure regulating device 48 includes a fixing plate 481, which is installed on the inner wall of the second protective box 41. A third rotating shaft 482 is rotatably connected to the fixing plate 481. One end of the third rotating shaft 482 rotates on the inner wall of the second protective box 41, and the other end of the third rotating shaft 482 is equipped with a first bevel gear 484. A second bevel gear 485 is installed on the drive shaft of the throttle valve 42. The first bevel gear 484 and the second bevel gear 485 mesh. A second gear 483 is installed on the third rotating shaft 482, and the second gear 483 meshes with the first rack 46. When the pressure in the throttling pipe 43 increases, the first rack 46 drives the second gear 483 to rotate, the second gear 483 drives the third shaft 482 to rotate, the third shaft 482 drives the first bevel gear 484 to rotate, the first bevel gear 484 drives the second bevel gear 485 to rotate, and the second bevel gear 485 drives the drive shaft of the throttling valve 42 to rotate. The drive shaft causes the valve opening to decrease, the cross-sectional area through which oil and gas pass is reduced, the flow rate decreases, and the pipeline pressure drops, so that the oil and gas flow remains stable and the pressure of the pipeline system is maintained at a stable and safe level.

[0034] The pressure relief device 49 includes a fixed column, one end of which is installed on the inner wall of the second protective box 41. A third gear 491 is rotatably connected to the fixed column. A fourth gear 492 is installed on one side of the third gear 491. The third gear 491 meshes with the second rack 47. A fourth rotating shaft is rotatably connected to the inner wall of the second protective box 41. A fifth gear 494 is installed on the fourth rotating shaft. A belt 493 is installed on the fourth gear 492 and the fifth gear 494. A pressure relief pipe 495 is installed on the throttling pipe 43. A rotating plate is installed inside the pressure relief pipe 495. A fifth rotating shaft is installed on the rotating plate. The fifth rotating shaft is installed on the fourth rotating shaft. A buffer pipe 496 is installed at one end of the pressure relief pipe 495.

[0035] When an abnormal situation occurs that causes a sharp increase in pressure in the throttle tube 43, the second rack 47 meshes with the third gear 491. The second rack 47 drives the third gear 491 to rotate, the third gear 491 drives the fourth gear 492 to rotate, the fourth gear 492 drives the belt 493 to rotate, the belt 493 drives the fifth gear 494 to rotate, the fifth gear 494 drives the fourth shaft to rotate, the fourth shaft drives the fifth shaft to rotate, and the fifth shaft drives the rotating plate to rotate. The high-pressure oil and gas flow out from the pressure relief pipe 495 into the buffer pipe 496. The spiral pipe of the buffer pipe 496 can reduce the impact force of the high-pressure oil and gas and reduce the impact on the base 1.

[0036] Working principle of the invention:

[0037] During operation, oil and gas flow through the four-way structure 2 into the filter pipe 32. Large impurities such as sand and gravel in the oil and gas are blocked by the first filter plate 331, while small impurities such as dust are blocked by the second filter plate 336. The oil and gas drive the drain fan 335 to rotate, which in turn drives the first rotating shaft 334 to rotate. The first rotating shaft 334 drives the first scraper 332 and the second scraper 337 to rotate. The first scraper 332 scrapes off the impurities on the surface of the first filter plate 331, and the second scraper 337 scrapes off the impurities on the surface of the second filter plate 336. When the drain fan 335 rotates, it generates centrifugal force, which throws large impurities such as sand and gravel against the pipe wall and accumulates in the outer shell 341.

[0038] When sand and gravel accumulate in the outer casing 341, they press the cylindrical slider 342 and cause it to slide closer to the spring 344 within the casing 341. The cylindrical slider 342 drives the guide post 343 to move, which in turn drives the connecting post to move. The connecting post then drives the first connecting rod 345 to rotate, which in turn drives the second connecting rod 346 to rotate. The second connecting rod 346 then drives the second rotating shaft to rotate, which in turn drives the first gear 347 to rotate. The first gear 347 then drives the sector gear 338 to rotate, which in turn drives the third filter plate and the sealing ring 333 to rotate. The filter holes of the third filter plate partially cover the filter holes of the first filter plate 331 to achieve a finer filtration effect. When the cylindrical slider 342 is located at... When the sand discharge pipe 35 is below, large impurities such as sand and gravel flow from the sand discharge pipe 35 into the recovery box. When the amount of large impurities such as sand and gravel decreases, the spring 344 stretches and drives the cylindrical slider 342 to slide away from the spring 344 in the outer shell 341. The cylindrical slider 342 drives the guide column 343 to move, the guide column 343 drives the connecting column to move, the connecting column drives the first connecting rod 345 to reverse, the first connecting rod 345 drives the second connecting rod 346 to reverse, the second connecting rod 346 drives the second rotating shaft to reverse, the second rotating shaft drives the first gear 347 to reverse, the first gear 347 drives the sector gear 338 to reverse, the sector gear 338 drives the third filter plate and sealing ring 333 to reverse, increasing the size of the filter holes of the first filter plate 331.

[0039] The filtered oil and gas enter the throttling pipe 43. When the pressure in the throttling pipe 43 increases, the oil and gas impact the diaphragm 44, causing the diaphragm 44 to deform under pressure and transfer the pressure to the inert gas, preventing corrosive media from directly contacting the bellows 45. The pressure in the bellows 45 increases, causing the bellows 45 to expand and drive the first rack 46 to move away from the connecting pipe. The first rack 46 drives the second rack 47 to move, which in turn drives the second gear 483 to rotate. The second gear 483 drives the third shaft 482 to rotate, which in turn drives the first bevel gear 484 to rotate. The first bevel gear 484 drives the second bevel gear 485 to rotate, which in turn drives the drive shaft of the throttling valve 42 to rotate. The drive shaft causes the valve opening to decrease, reducing the cross-sectional area through which the oil and gas pass, thus reducing the flow rate and causing the pipeline pressure to drop. This keeps the oil and gas flow stable and ensures that the pressure of the pipeline system is maintained at a stable and safe level.

[0040] When an abnormal situation occurs that causes a sharp increase in pressure in the throttling pipe 43, the second rack 47 meshes with the third gear 491. The second rack 47 drives the third gear 491 to rotate, the third gear 491 drives the fourth gear 492 to rotate, the fourth gear 492 drives the belt 493 to rotate, the belt 493 drives the fifth gear 494 to rotate, the fifth gear 494 drives the fourth shaft to rotate, the fourth shaft drives the fifth shaft to rotate, and the fifth shaft drives the rotating plate to rotate. The high-pressure oil and gas flow out from the pressure relief pipe 495 into the buffer pipe 496. The spiral pipe of the buffer pipe 496 can reduce the impact force of the high-pressure oil and gas and reduce the impact on the base 1. After the high-pressure oil and gas flows out, the pressure in the pipe quickly drops back to a safe range, effectively preventing damage to the pipe and related equipment due to excessive pressure. After passing through the throttling device 4, the oil and gas flow out from the external pipe 5.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pressure-regulating offshore oil development throttling and kill manifold, characterized in that: The throttling and kill manifold includes a base (1), on which a four-way structure (2) is installed. A filter device (3), a throttling device (4), and an external pipe (5) are sequentially installed on one side of the four-way structure (2). An injection structure (6) is installed at one end of the four-way structure (2). A vibration damping bracket (7) is installed at one end of the filter device (3), the throttling device (4), the external pipe (5), and the injection structure (6). The vibration damping bracket (7) is installed on the base (1). The filter device (3) includes a filter tube (32), one end of which is mounted on a vibration damping bracket (7). A sand collection pipe (34) is installed on the filter tube (32), which is located inside the first protective box (31). A sand discharge pipe (35) is installed on one side of the sand collection pipe (34). A sand filtering device (33) is installed inside the filter tube (32). The sand filtration device (33) includes a first filter plate (331) and a second filter plate (336). The first filter plate (331) and the second filter plate (336) are installed inside the filter tube (32). A first rotating shaft (334) is rotatably connected to the first filter plate (331) and the second filter plate (336). A first scraper (332), a drain fan (335), and a second scraper (337) are installed on the first rotating shaft (334). The first scraper (332) abuts against one end of the first filter plate (331). A sealing ring (333) is rotatably connected to the other end of the first filter plate (331). A third filter plate is installed inside the sealing ring (333). A sector gear (338) is connected to the third filter plate. The second scraper (337) abuts against one end of the second filter plate (336). The sand collecting pipe (34) includes a shell (341), which is mounted on the filter pipe (32). The sand discharge pipe (35) is mounted on one side of the shell (341). A cylindrical slider (342) is slidably connected inside the sand discharge pipe (35). A guide post (343) is mounted on one end of the cylindrical slider (342). A spring (344) is mounted on one side of the cylindrical slider (342). The other end of the spring (344) is mounted on the shell (341). The spring (344) is sleeved on... A guide post (343) is attached to the guide post (343), a connecting post is installed on the guide post (343), a first connecting rod (345) is rotatably connected to the connecting post, a second connecting rod (346) is rotatably connected to one end of the first connecting rod (345), a second rotating shaft is rotatably connected to one end of the second connecting rod (346), one end of the second rotating shaft is rotatably connected to the outside of the outer shell (341), a first gear (347) is installed on one end of the second rotating shaft, and the first gear (347) meshes with a sector gear (338).

2. The pressure-regulating offshore oil development throttling and kill manifold according to claim 1, characterized in that: The filter tube (32) is installed between the four-way structure (2) and the throttling device (4). A first protective box (31) is installed on the outside of the filter tube (32), and a recycling box is installed at one end of the sand discharge pipe (35).

3. A pressure-regulating offshore oil development throttling and kill manifold according to claim 2, characterized in that: The throttling device (4) includes a throttling pipe (43), one end of which is mounted on a four-way structure (2), and the other end of which is mounted on a throttling valve (42). One end of the throttling valve (42) is mounted on an external connecting pipe (5), and a second protective box (41) is mounted on the outside of the throttling valve (42). A connecting pipe is mounted on the throttling pipe (43), and a corrugated pipe (45) is mounted on the connecting pipe. The corrugated pipe (45) and the connecting pipe are connected... A diaphragm (44) is installed between the corrugated pipes (45), which are filled with inert gas. A first rack (46) is installed at one end of the corrugated pipe (45), a pressure regulating device (48) is installed on one side of the first rack (46), a second rack (47) is connected to one side of the first rack (46), and a pressure relief device (49) is installed on one side of the second rack (47). The pressure regulating device (48) and the pressure relief device (49) are installed on the inner wall of the second protective box (41).

4. A pressure-regulating offshore oil development throttling and kill manifold according to claim 3, characterized in that: The pressure regulating device (48) includes a fixing plate (481) which is installed on the inner wall of the second protective box (41). A third rotating shaft (482) is rotatably connected to the fixing plate (481). One end of the third rotating shaft (482) rotates on the inner wall of the second protective box (41), and the other end of the third rotating shaft (482) is equipped with a first bevel gear (484). A second bevel gear (485) is installed on the drive shaft of the throttle valve (42). The first bevel gear (484) and the second bevel gear (485) mesh. A second gear (483) is installed on the third rotating shaft (482), and the second gear (483) meshes with the first rack (46).

5. A pressure-regulating offshore oil development throttling and kill manifold according to claim 4, characterized in that: The pressure relief device (49) includes a fixed column, one end of which is installed on the inner wall of the second protective box (41). A third gear (491) is rotatably connected to the fixed column. A fourth gear (492) is installed on one side of the third gear (491). The third gear (491) meshes with the second rack (47). A fourth rotating shaft is rotatably connected to the inner wall of the second protective box (41). A fifth gear (494) is installed on the fourth rotating shaft. A belt (493) is installed on the fourth gear (492) and the fifth gear (494). A pressure relief pipe (495) is installed on the throttling pipe (43). A rotating plate is installed inside the pressure relief pipe (495). A fifth rotating shaft is installed on the rotating plate. The fifth rotating shaft is installed on the fourth rotating shaft. A buffer pipe (496) is installed at one end of the pressure relief pipe (495).

6. A pressure-regulating offshore oil development throttling and kill manifold according to claim 5, characterized in that: The filter hole positions of the third filter plate correspond to the filter hole positions of the first filter plate (331), and the filter hole size of the second filter plate (336) is smaller than that of the first filter plate (331).

Images