Blowout preventer control device with pressure regulating function

Abstract

The present invention provides a blowout preventer control device with a pressure regulating function. The blowout preventer control device includes: a pressure regulating valve; an air motor connected to the pressure regulating valve for regulating the pressure of the pressure regulating valve. The air motor has a first air supply port for supplying air to drive the pressure regulating valve to increase pressure and a second air supply port for supplying air to drive the pressure regulating valve to decrease pressure; a first rotary valve provided on a remote control console. The inlet of the first rotary valve is connected to the air source of the remote control console. The first rotary valve has a first outlet and a second outlet. The first outlet is connected to the first air supply port, and the second outlet is connected to the second air supply port; a pneumatic control valve provided on the remote control console. The inlet of the pneumatic control valve is connected to the air source of the remote control console. The pneumatic control valve has a third outlet and a fourth outlet. The third outlet is connected to the first air supply port, and the fourth outlet is connected to the second air supply port. By means of the present invention, the technical problem that the probability of damage to the sealing rubber core of the annular blowout preventer is relatively high is alleviated.

Description

Technical Field

[0001] The present invention relates to the field of oil extraction equipment, and particularly to a blowout preventer control device with a pressure regulating function. Background Art

[0002] A blowout preventer is an important device in a well control system. When the blowout preventer is closed, it can seal the wellhead to prevent and control well kicks and blowouts. An annular blowout preventer is one type of blowout preventer. When the annular blowout preventer is closed, a drill pipe can pass through the annular blowout preventer. The annular blowout preventer has a sealing rubber core that cooperates with the side wall of the drill pipe, so as to seal the wellhead when the drill pipe has not been removed from the wellhead. However, during actual operation, the probability of damage to the sealing rubber core of the annular blowout preventer is relatively high, thus reducing the reliability of the operation of the annular blowout preventer and shortening its service life. Summary of the Invention

[0003] The object of the present invention is to provide a blowout preventer control device with a pressure regulating function to alleviate the technical problem that the probability of damage to the sealing rubber core of the annular blowout preventer is relatively high.

[0004] The above object of the present invention can be achieved by the following technical solutions:

[0005] The present invention provides a blowout preventer control device with a pressure regulating function, comprising:

[0006] A pressure regulating valve;

[0007] An air motor, which is connected to the pressure regulating valve and is used for pressure regulating control of the pressure regulating valve. The air motor has a first air supply port for supplying air to drive the pressure regulating valve to increase pressure and a second air supply port for supplying air to drive the pressure regulating valve to decrease pressure;

[0008] A first rotary valve, which is arranged on a remote control console. The inlet of the first rotary valve is connected to the air source of the remote control console. The first rotary valve has a first outlet and a second outlet. The first outlet is connected to the first air supply port, and the second outlet is connected to the second air supply port. The inlet of the first rotary valve can be switched to be connected to the first outlet or to the second outlet;

[0009] An air control valve, which is arranged on the remote control console. The inlet of the air control valve is connected to the air source of the remote control console. The air control valve has a third outlet and a fourth outlet. The third outlet is connected to the first air supply port, and the fourth outlet is connected to the second air supply port. The inlet of the air control valve can be switched to be connected to the third outlet or to the fourth outlet.

[0010] In a preferred embodiment, the blowout preventer control device with a pressure regulating function includes a second rotary valve provided on the driller's control console. The second rotary valve is connected to the pneumatic control valve, and the second rotary valve can control the pneumatic control valve to connect the inlet of the pneumatic control valve to the third outlet or connect the inlet of the pneumatic control valve to the fourth outlet.

[0011] In a preferred embodiment, the blowout preventer control device with a pressure regulating function includes a third rotary valve provided on the auxiliary control console. The third rotary valve is connected to the pneumatic control valve, and the third rotary valve can control the pneumatic control valve to connect the inlet of the pneumatic control valve to the third outlet or connect the inlet of the pneumatic control valve to the fourth outlet.

[0012] In a preferred embodiment, the blowout preventer control device with a pressure regulating function includes a first shuttle valve, a second shuttle valve, a second rotary valve provided on the driller's control console, and a third rotary valve provided on the auxiliary control console. The second rotary valve is connected to the pneumatic control valve, and the second rotary valve can control the pneumatic control valve to connect the inlet of the pneumatic control valve to the third outlet or connect the inlet of the pneumatic control valve to the fourth outlet. The third rotary valve is connected to the pneumatic control valve, and the third rotary valve can control the pneumatic control valve to connect the inlet of the pneumatic control valve to the third outlet or connect the inlet of the pneumatic control valve to the fourth outlet. The second rotary valve has a fifth outlet and a sixth outlet, and the third rotary valve has a seventh outlet and an eighth outlet. The pneumatic control valve has a first pneumatic control port and a second pneumatic control port. When the first pneumatic control port is ventilated, the inlet of the pneumatic control valve is connected to the third outlet. When the second pneumatic control port is ventilated, the inlet of the pneumatic control valve is connected to the fourth outlet. The fifth outlet and the seventh outlet are connected to the first pneumatic control port through the first shuttle valve, and the sixth outlet and the eighth outlet are connected to the second pneumatic control port through the second shuttle valve.

[0013] In a preferred embodiment, the blowout preventer control device with a pressure regulating function includes a third shuttle valve and a fourth shuttle valve. The first outlet and the third outlet are connected to the first air supply port through the third shuttle valve, and the second outlet and the fourth outlet are connected to the second air supply port through the fourth shuttle valve.

[0014] In a preferred embodiment, the blowout preventer control device with a pressure regulating function includes a first exhaust valve and a second exhaust valve. The first exhaust valve is provided between the third shuttle valve and the first air supply port, and the second exhaust valve is provided between the fourth shuttle valve and the second air supply port.

[0015] In a preferred embodiment, a first silencer is connected to the exhaust port of the first exhaust valve, and a second silencer is connected to the exhaust port of the second exhaust valve.

[0016] In a preferred embodiment, the pneumatic control valve is a three-position five-way pneumatic control valve.

[0017] The present invention provides a blowout preventer control system, comprising: a liquid transfer valve and the above-mentioned blowout preventer control device with a pressure regulating function; a hydraulic power liquid source is connected to the blowout preventer through the liquid transfer valve, and the liquid transfer valve is used to control the switch and direction of the power liquid flowing into the blowout preventer; the pressure regulating valve in the blowout preventer control device with a pressure regulating function is arranged between the hydraulic power liquid source and the liquid transfer valve.

[0018] The present invention provides a blowout preventer system, comprising: a blowout preventer, a hydraulic power liquid source, a liquid transfer valve and the above-mentioned blowout preventer control device with a pressure regulating function; the hydraulic power liquid source is connected to the blowout preventer through the liquid transfer valve, and the liquid transfer valve is used to control the switch and direction of the power liquid flowing into the blowout preventer; the pressure regulating valve in the blowout preventer control device with a pressure regulating function is arranged between the hydraulic power liquid source and the liquid transfer valve.

[0019] The characteristics and advantages of the present invention are:

[0020] Connect the blowout preventer control device with a pressure regulating function to the liquid supply circuit of the annular blowout preventer. At the remote control console, by operating the first rotary valve, connect the inlet of the first rotary valve to the first outlet or the second outlet, so as to control the air flow of the air source at the remote control console to flow into the first air supply port or the second air supply port of the air motor, thereby driving the pressure regulating valve to increase or decrease the pressure.

[0021] A pneumatic control valve is also provided on the remote control console. The pneumatic control valve is controlled by a control air flow. The valve can be set as needed. The valve can be arranged at a position far from the remote control console. The valve is connected to the pipeline of the control air flow to regulate the control air flow, so as to control the pneumatic control valve at a relatively far position, and connect the inlet of the pneumatic control valve to the third outlet or the fourth outlet, so as to control the air flow of the air source at the remote control console to flow into the first air supply port or the second air supply port of the air motor, thereby driving the pressure regulating valve to increase or decrease the pressure.

[0022] The blowout preventer control device with a pressure regulating function has the following beneficial effects:

[0023] (1) When the sealing rubber core of the annular blowout preventer encounters a position where the outer diameter of the drill pipe is relatively large, through the blowout preventer control device with a pressure regulating function, the pressure of the liquid supply circuit of the annular blowout preventer can be lowered to reduce the extrusion strength between the sealing rubber ring and the drill pipe, effectively avoiding damage to the sealing rubber core;

[0024] (2) Both the pneumatic control valve and the first rotary valve are arranged on the remote control console. The valve connected to the pneumatic control valve can be arranged at a position far from the remote control console, so as to facilitate the control of the pressure of the liquid supply circuit of the annular blowout preventer at a position far from the remote control console;

[0025] (3) When at a location other than the remote control console, the valve regulates the control air flow of the pneumatic control valve to regulate the pressure regulating valve through the pneumatic control valve; in this way, the air flow driving the air motor still comes from the air source of the remote control console, and the control air flow flows from a location outside the remote control console to the remote control console. Since the flow rate of the control air flow is small, it is convenient for long-distance transmission, which helps to reduce the air consumption of the blowout preventer control device with pressure regulating function and ensures that the air motor has sufficient air source supply, improving the operating stability of the blowout preventer control device with pressure regulating function. Description of the Drawings

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 Schematic diagram of the blowout preventer control system provided by the present invention;

[0028] Figure 2 For Figure 1 Connection schematic diagram of the pressure regulating valve and the air motor in the blowout preventer control system shown;

[0029] Figure 3 For Figure 1 Structural schematic diagram of the first rotary valve in the blowout preventer control system shown;

[0030] Figure 4 For Figure 1 Structural schematic diagram of the pneumatic control valve in the blowout preventer control system shown;

[0031] Figure 5 For Figure 1 Structural schematic diagram of the hydraulic rotary valve in the blowout preventer control system shown;

[0032] Figure 6 For Figure 1 Structural schematic diagram of the first shuttle valve in the blowout preventer control system shown;

[0033] Figure 7 For Figure 1 Structural schematic diagram of the first exhaust valve in the blowout preventer control system shown.

[0034] Explanation of the reference numerals in the drawings:

[0035] 01, remote control console; 02, driller's console; 03, auxiliary console;

[0036] 10, pressure regulating valve; 11, hydraulic power fluid source;

[0037] 12. Liquid transfer valve; 121. First liquid port; 122. Second liquid port; 123. Third liquid port; 124. Fourth liquid port;

[0038] 20. Air motor; 21. First air supply port; 22. Second air supply port;

[0039] 31. First rotary valve; 310. Inlet of the first rotary valve; 311. First outlet; 312. Second outlet;

[0040] 32. Second rotary valve; 321. Fifth outlet; 322. Sixth outlet;

[0041] 33. Third rotary valve; 331. Seventh outlet; 332. Eighth outlet;

[0042] 40. Pneumatic control valve; 400. Inlet of the pneumatic control valve; 401. Third outlet; 402. Fourth outlet; 403. First pneumatic control port; 404. Second pneumatic control port;

[0043] 51. First shuttle valve; 511. First shuttle valve inlet; 512. Second shuttle valve inlet; 513. Shuttle valve outlet;

[0044] 52. Second shuttle valve; 53. Third shuttle valve; 54. Fourth shuttle valve;

[0045] 61. First exhaust valve; 611. Air inlet; 612. Air outlet; 613. Exhaust port;

[0046] 601. First silencer;

[0047] 62. Second exhaust valve; 602. Second silencer;

[0048] 71. Remote control console air source; 72. Driller's console air source; 73. Auxiliary console air source. Detailed implementation manners

[0049] 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. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0050] Embodiment 1

[0051] The drill pipe lowered into the well has a larger diameter at the drill pipe joint. The inventor found that when the drill pipe joint passes through the sealing rubber core of the annular blowout preventer, it will cause a tendency for the pressure in the liquid supply circuit of the annular blowout preventer to rise, resulting in the situation where the drill pipe joint squeezes the rubber core, which easily causes damage to the sealing rubber core of the annular blowout preventer.

[0052] For this reason, the present invention provides a blowout preventer control device with a pressure regulating function, as Figure 1 shown. The blowout preventer control device with a pressure regulating function includes: a pressure regulating valve 10, an air motor 20, a first rotary valve 31 and a pneumatic control valve 40; the air motor 20 is connected to the pressure regulating valve 10 and is used for pressure regulating control of the pressure regulating valve 10. The air motor 20 has a first air supply port 21 for supplying air to drive the pressure regulating valve 10 to boost pressure and a second air supply port 22 for supplying air to drive the pressure regulating valve 10 to reduce pressure; the first rotary valve 31 is arranged on the remote control console 01. The inlet 310 of the first rotary valve is connected to the remote control console air source 71. The first rotary valve 31 has a first outlet 311 and a second outlet 312. The first outlet 311 is connected to the first air supply port 21, and the second outlet 312 is connected to the second air supply port 22. The inlet 310 of the first rotary valve can be switched to be connected to the first outlet 311 or to the second outlet 312; the pneumatic control valve 40 is arranged on the remote control console 01. The inlet 400 of the pneumatic control valve is connected to the remote control console air source 71. The pneumatic control valve 40 has a third outlet 401 and a fourth outlet 402. The third outlet 401 is connected to the first air supply port 21, and the fourth outlet 402 is connected to the second air supply port 22. The inlet 400 of the pneumatic control valve can be switched to be connected to the third outlet 401 or to the fourth outlet 402.

[0053] Connect the blowout preventer control device with a pressure regulating function to the liquid supply circuit of the annular blowout preventer. On the remote control console 01, by operating the first rotary valve 31, the inlet 310 of the first rotary valve is connected to the first outlet 311 or the second outlet 312, so as to control the air flow of the remote control console air source 71 to flow into the first air supply port 21 or the second air supply port 22 of the air motor 20, thereby driving the pressure regulating valve 10 to boost pressure or reduce pressure.

[0054] A pneumatic control valve 40 is also arranged on the remote control console 01. The pneumatic control valve 40 is controlled by a control air flow. A valve can be set as required. This valve can be set at a position far from the remote control console 01. This valve is connected to the pipeline of the control air flow to regulate the control air flow, so as to control the pneumatic control valve 40 at a relatively far position, make the inlet 400 of the pneumatic control valve connected to the third outlet 401 or the fourth outlet 402, thereby controlling the air flow of the remote control console air source 71 to flow into the first air supply port 21 or the second air supply port 22 of the air motor 20, and thereby driving the pressure regulating valve 10 to boost pressure or reduce pressure.

[0055] The blowout preventer control device with a pressure regulating function has the following beneficial effects:

[0056] (1) When the sealing rubber core of the annular blowout preventer encounters a drill pipe joint, the pressure of the liquid supply circuit of the annular blowout preventer can be reduced through the blowout preventer control device with pressure regulating function, so as to reduce the extrusion strength between the sealing rubber ring and the drill pipe, and effectively avoid damage to the sealing rubber core;

[0057] (2) The pneumatic control valve 40 and the first rotary valve 31 are both arranged on the remote control console 01. The valve connected to the pneumatic control valve 40 can be arranged at a position far from the remote control console 01, so as to facilitate the control of the pressure of the liquid supply circuit of the annular blowout preventer at a position far from the remote control console 01;

[0058] (3) When at a position outside the remote control console 01, the valve regulates the control air flow of the pneumatic control valve 40 to regulate the pressure regulating valve 10 through the pneumatic control valve 40; in this way, the air flow driving the air motor 20 to act is still provided by the remote control console air source 71, and the control air flow flows from a position outside the remote control console 01 to the remote control console 01. Since the flow rate of the control air flow is small, it is convenient for long-distance transportation, which is beneficial to reducing the air consumption of the blowout preventer control device with pressure regulating function, and ensuring that the air motor 20 has sufficient air source supply, and improving the operation stability of the blowout preventer control device with pressure regulating function.

[0059] Such as Figure 1 and Figure 2 shown, in the blowout preventer control device with pressure regulating function, the air motor 20 is connected to the pressure regulating valve 10. When the air motor 20 rotates, it drives the core shaft of the pressure regulating valve 10 to move, so as to increase or decrease the pressure of the pressure regulating valve 10. Specifically, when the air motor 20 is supplied with air through the first air supply port 21, the air motor 20 rotates forward to drive the pressure regulating valve 10 to increase the pressure; when the air motor 20 is supplied with air through the second air supply port 22, the air motor 20 rotates in reverse to drive the pressure regulating valve 10 to decrease the pressure. The pressure regulating valve 10 can adopt an annular pressure regulating valve 10.

[0060] The liquid source of the blowout preventer is usually arranged on the remote control console 01, and the pressure regulating valve 10 and the air motor 20 are also arranged on the remote control console 01. The air flow required to drive the air motor 20 to act is relatively large, and the air source of the air motor 20 is arranged on the remote control console 01. Specifically, the air source of the air motor 20 is the remote control console air source 71. In this way, the distance between the air motor 20 and its air source is small, which is beneficial to stably supplying sufficient air source for the air motor 20.

[0061] In one embodiment of the present invention, a blowout preventer control device with pressure regulation includes a second rotary valve 32 located on the driller's console 02. The second rotary valve 32 is connected to an air control valve 40. The second rotary valve 32 can control the air control valve 40, connecting the air control valve's inlet 400 to the third outlet 401 or the air control valve's inlet 400 to the fourth outlet 402. The second rotary valve 32 facilitates operator control of the pressure regulating valve 10 via the air control valve 40 at the driller's console 02, enabling remote and timely adjustment of the blowout preventer's fluid supply pressure, thereby effectively reducing compression of the blowout preventer's sealant core. The driller's console 02 is equipped with a driller's console air source 72 connected to the second rotary valve 32. The airflow provided by the driller's console air source 72 flows through the second rotary valve 32 as a controlled airflow to the air rotary valve. This airflow has a relatively low flow rate.

[0062] In one embodiment of the present invention, a blowout preventer control device with pressure regulation includes a third rotary valve 33 located on an auxiliary console 03. The third rotary valve 33 is connected to an air control valve 40 and can control the air control valve 40, connecting the air control valve's inlet 400 to the third outlet 401 or the air control valve's inlet 400 to the fourth outlet 402. The third rotary valve 33 facilitates operator control of the pressure regulating valve 10 via the air control valve 40 at the auxiliary console 03, enabling remote and timely adjustment of the blowout preventer's fluid supply pressure, thereby more effectively reducing compression of the blowout preventer's sealant core. The auxiliary console 03 is equipped with an auxiliary console air source 73 connected to the third rotary valve 33. The airflow provided by the auxiliary console air source 73 flows through the third rotary valve 33 as a controlled airflow to the air control valve. This airflow has a relatively low flow rate.

[0063] In one embodiment of the present invention, a blowout preventer control device with a pressure regulating function includes a first shuttle valve 51, a second shuttle valve 52, a second rotary valve 32 provided on the driller's console 02, and a third rotary valve 33 provided on the auxiliary console 03; the second rotary valve 32 is connected to the air control valve 40, and the second rotary valve 32 can control the air control valve 40 so that the inlet 400 of the air control valve is connected to the third outlet 401 or the inlet 400 of the air control valve is connected to the fourth outlet 402; the third rotary valve 33 is connected to the air control valve 40, and the third rotary valve 33 can control the air control valve 40 so that the inlet 400 of the air control valve is connected to the third outlet 401 or the inlet 400 of the air control valve is connected to the fourth outlet 402; specifically, as Figure 1 、 Figure 3 and Figure 4As shown in the figure, the second rotary valve 32 has a fifth outlet 321 and a sixth outlet 322, and the third rotary valve 33 has a seventh outlet 331 and an eighth outlet 332; the pneumatic control valve 40 has a first pneumatic control port 403 and a second pneumatic control port 404. When the first pneumatic control port 403 is ventilated, the inlet 400 of the pneumatic control valve is connected to the fourth outlet 402; when the second pneumatic control port 404 is ventilated, the inlet 400 of the pneumatic control valve is connected to the third outlet 401; the fifth outlet 321 and the seventh outlet 331 are connected to the first pneumatic control port 403 through the first shuttle valve 51, and the sixth outlet 322 and the eighth outlet 332 are connected to the second pneumatic control port 404 through the second shuttle valve 52.

[0064] As Figure 1 shown in the figure, through the first shuttle valve 51, after the pipelines of the fifth outlet 321 and the seventh outlet 331 are aggregated, they are connected to the pneumatic control valve 40 together; through the second shuttle valve 52, after the pipelines of the sixth outlet 322 and the eighth outlet 332 are aggregated, they are connected to the pneumatic control valve 40 together. In this way, it is beneficial to shorten the length of the pipeline, reduce the consumption of the pipeline, and facilitate maintenance.

[0065] As Figure 1 and Figure 6 shown in the figure, the first shuttle valve 51 has a first shuttle valve inlet 511, a second shuttle valve inlet 512 and a shuttle valve outlet 513. The fifth outlet 321 is connected to the first shuttle valve inlet 511, the seventh outlet 331 is connected to the second shuttle valve inlet 512, and the first pneumatic control port 403 is connected to the shuttle valve outlet 513. When the first shuttle valve inlet 511 is ventilated, the first shuttle valve inlet 511 is communicated with the shuttle valve outlet 513; when the second shuttle valve inlet 512 is ventilated, the second shuttle valve inlet 512 is communicated with the shuttle valve outlet 513. The structure of the second shuttle valve 52 is similar to the structure and connection mode of the first shuttle valve 51, and will not be elaborated here.

[0066] In an embodiment of the present invention, the blowout preventer control device with a pressure regulating function includes a third shuttle valve 53 and a fourth shuttle valve 54. The first outlet 311 and the third outlet 401 are connected to the first air supply port 21 through the third shuttle valve 53, and the second outlet 312 and the fourth outlet 402 are connected to the second air supply port 22 through the fourth shuttle valve 54. As Figure 1 shown in the figure, through the third shuttle valve 53, after the pipelines of the first outlet 311 and the third outlet 401 are aggregated, they are connected to the air motor 20 together; through the fourth shuttle valve 54, after the pipelines of the second outlet 312 and the fourth outlet 402 are aggregated, they are connected to the air motor 20 together. In this way, it is beneficial to shorten the length of the pipeline, reduce the consumption of the pipeline, and facilitate maintenance. The structure and connection mode of the first shuttle valve 51 have been introduced above. The structures and connection modes of the third shuttle valve 53 and the fourth shuttle valve 54 are similar to those of the first shuttle valve 51, and will not be elaborated here.

[0067] Further, the blowout preventer control device with a pressure regulating function includes a first exhaust valve 61 and a second exhaust valve 62. The first exhaust valve 61 is arranged between the third shuttle valve 53 and the first air supply port 21, and the second exhaust valve 62 is arranged between the fourth shuttle valve 54 and the second air supply port 22. When the first air supply port 21 supplies air, after the air flow passes through the air motor 20, it can be discharged outward through the second exhaust valve 62, which is beneficial to ensuring the smoothness of the air path of the air motor 20 and the stability of its operation; when the second air supply port 22 supplies air, after the air flow passes through the air motor 20, it can be discharged outward through the first exhaust valve 61, which is beneficial to ensuring the smoothness of the air path of the air motor 20 and the stability of its operation.

[0068] As Figure 1 and Figure 7 shown, the first exhaust valve 61 has an air inlet 611, an air outlet 612 and an exhaust port 613. The air inlet 611 is connected to the third shuttle valve 53, and the air outlet 612 is connected to the air motor 20. When the air inlet 611 admits air, the air inlet 611 is connected to the air outlet 612, and the connection between the air inlet 611 and the exhaust port 613 is disconnected, so as to facilitate the air flow through the third shuttle valve 53 to flow to the air motor 20; when the air flow discharged from the air motor 20 flows to the air outlet 612, the connection between the air outlet 612 and the air inlet 611 is disconnected, and the air outlet 612 is communicated with the exhaust port 613, so as to facilitate the air flow of the air motor 20 to be discharged outward through the exhaust port 613 of the first exhaust valve 61. The structure of the second exhaust valve 62 is similar to the structure and connection mode of the first exhaust valve 61, and will not be elaborated here.

[0069] Further, a first silencer 601 is connected to the exhaust port 613 of the first exhaust valve 61, and a second silencer 602 is connected to the exhaust port 613 of the second exhaust valve 62 to reduce the noise when exhausting outward.

[0070] The pneumatic control valve 40 can adopt a three-position five-way pneumatic control valve 40. As Figure 1 and Figure 4 shown, by switching the air supply states of the first pneumatic control port 403 and the second pneumatic control port 404, the connection states among the inlet 400, the third outlet 401 and the fourth outlet 402 of the pneumatic control valve are switched.

[0071] The first rotary valve 31 can adopt a three-position four-way pneumatic rotary valve. As Figure 1 and Figure 3 shown, by pulling the handle of the three-position four-way pneumatic rotary valve, the operator can switch the connection states among the inlet 310, the first outlet 311 and the second outlet 312 of the first rotary valve. The second rotary valve 32 and the third rotary valve 33 can also adopt three-position four-way pneumatic rotary valves. The structures and working modes of the second rotary valve 32 and the third rotary valve 33 are similar to those of the first rotary valve 31, and will not be elaborated here.

[0072] Embodiment 2

[0073] The opening and closing of the blowout preventer are controlled by a blowout preventer control system. The blowout preventer control system controls the opening and closing of the blowout preventer by controlling the direction of the hydraulic power fluid flowing into the blowout preventer.

[0074] The present invention provides a blowout preventer control system, as Figure 1 shown. The blowout preventer control system includes: a fluid transfer valve 12 and the above-mentioned blowout preventer control device with a pressure regulating function; a hydraulic power fluid source 11 is connected to the blowout preventer through the fluid transfer valve 12. The fluid transfer valve 12 is used to control the switch and direction of the power fluid flowing into the blowout preventer, so as to control the switch and direction of the annular blowout preventer; the pressure regulating valve 10 in the blowout preventer control device with a pressure regulating function is arranged between the hydraulic power fluid source 11 and the fluid transfer valve 12.

[0075] The blowout preventer in the blowout preventer control system can be an annular blowout preventer. During the working process, the fluid transfer valve 12 controls the opening and closing of the blowout preventer by controlling the switch and direction of the power fluid flowing into the blowout preventer. The power fluid flows through the pressure regulating valve 10, and the blowout preventer control device with a pressure regulating function can regulate the pressure of the power fluid. For example, when the sealing rubber core of the annular blowout preventer contacts the drill pipe joint, the blowout preventer control device with a pressure regulating function reduces the pressure of the power fluid, which can reduce the extrusion between the sealing rubber core and the drill pipe joint and reduce the damage to the sealing rubber core.

[0076] The fluid transfer valve 12 can adopt a three-position four-way fluid transfer valve 12, as Figure 1 and Figure 5 shown. The three-position four-way fluid transfer valve 12 has a first fluid port 121, a second fluid port 122, a third fluid port 123 and a fourth fluid port 124. The first fluid port 121 is connected to the hydraulic power fluid source 11 through the pressure regulating valve 10, the second fluid port 122 is connected to the oil cylinder, and the third fluid port 123 and the fourth fluid port 124 are respectively connected to the blowout preventer. By controlling the three-position four-way fluid transfer valve 12 and switching the communication state between the first fluid port 121, the second fluid port 122, the third fluid port 123 and the fourth fluid port 124, the fluid flow direction in the pipeline from the third fluid port 123, the blowout preventer to the fourth fluid port 124 can be controlled to control the opening and closing of the blowout preventer.

[0077] Embodiment III

[0078] The present invention provides a blowout preventer system. The blowout preventer system includes: a blowout preventer, a hydraulic power fluid source 11, a fluid transfer valve 12 and the above-mentioned blowout preventer control device with a pressure regulating function; the hydraulic power fluid source 11 is connected to the blowout preventer through the fluid transfer valve 12. The fluid transfer valve 12 is used to control the switch and direction of the power fluid flowing into the blowout preventer, so as to control the switch and direction of the annular blowout preventer; the pressure regulating valve 10 in the blowout preventer control device with a pressure regulating function is arranged between the hydraulic power fluid source 11 and the fluid transfer valve 12.

[0079] The hydraulic power fluid source 11 and the fluid transfer valve 12 are components in the fluid supply circuit of the blowout preventer. In this blowout preventer system, when the pressure is too high during the operation of the blowout preventer, the pressure of the power fluid in the fluid supply circuit can be reduced by the blowout preventer control device with a pressure regulating function to protect the blowout preventer, which is beneficial to improving the working stability of the blowout preventer. Specifically, the hydraulic power fluid source 11, the fluid transfer valve 12, the pressure regulating valve 10, the air motor 20 and the pneumatic control valve 40 can all be arranged on the remote control console 01.

[0080] The above are only several embodiments of the present invention. Those skilled in the art can make various changes or modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention according to the content disclosed in the application documents.

Claims

1. A blowout preventer control device with a pressure regulating function, characterized in that, Comprising: A pressure regulating valve; An air motor, which is connected to the pressure regulating valve and is used for regulating the pressure of the pressure regulating valve. The air motor has a first air supply port for supplying air to drive the pressure regulating valve to boost the pressure and a second air supply port for supplying air to drive the pressure regulating valve to reduce the pressure; A first rotary valve, which is arranged on the remote control console. The inlet of the first rotary valve is connected to the remote control console air source. The first rotary valve has a first outlet and a second outlet. The first outlet is connected to the first air supply port, and the second outlet is connected to the second air supply port. The inlet of the first rotary valve can be switched to be connected to the first outlet or to the second outlet; An air control valve, which is arranged on the remote control console. The inlet of the air control valve is connected to the remote control console air source. The air control valve has a third outlet and a fourth outlet. The third outlet is connected to the first air supply port, and the fourth outlet is connected to the second air supply port. The inlet of the air control valve can be switched to be connected to the third outlet or to the fourth outlet. The air control valve is a three-position five-way air control valve; The blowout preventer control device with a pressure regulating function includes a second rotary valve arranged on the driller's console. The second rotary valve is connected to the air control valve, and the second rotary valve can control the air control valve to make the inlet of the air control valve connected to the third outlet or the inlet of the air control valve connected to the fourth outlet; The blowout preventer control device with a pressure regulating function includes a third rotary valve arranged on the auxiliary console. The third rotary valve is connected to the air control valve, and the third rotary valve can control the air control valve to make the inlet of the air control valve connected to the third outlet or the inlet of the air control valve connected to the fourth outlet.

2. The blowout preventer control device with a pressure regulating function according to claim 1, characterized in that, The blowout preventer control device with a pressure regulating function includes a first shuttle valve, a second shuttle valve, a second rotary valve arranged on the driller's console and a third rotary valve arranged on the auxiliary console; The second rotary valve is connected to the air control valve, and the second rotary valve can control the air control valve to make the inlet of the air control valve connected to the third outlet or the inlet of the air control valve connected to the fourth outlet; The third rotary valve is connected to the air control valve, and the third rotary valve can control the air control valve to make the inlet of the air control valve connected to the third outlet or the inlet of the air control valve connected to the fourth outlet; The second rotary valve has a fifth outlet and a sixth outlet; the third rotary valve has a seventh outlet and an eighth outlet; the air control valve has a first air control port and a second air control port. When the first air control port is ventilated, the inlet of the air control valve is connected to the third outlet; When the second air control port is ventilated, the inlet of the air control valve is connected to the fourth outlet; The fifth outlet and the seventh outlet are connected to the first air control port through the first shuttle valve, and the sixth outlet and the eighth outlet are connected to the second air control port through the second shuttle valve.

3. The blowout preventer control device with a pressure regulating function according to claim 1, characterized in that, The blowout preventer control device with a pressure regulating function includes a third shuttle valve and a fourth shuttle valve. The first outlet and the third outlet are connected to the first air supply port through the third shuttle valve, and the second outlet and the fourth outlet are connected to the second air supply port through the fourth shuttle valve.

4. The blowout preventer control device with a pressure regulating function according to claim 3, characterized in that, The blowout preventer control device with a pressure regulating function includes a first exhaust valve and a second exhaust valve. The first exhaust valve is arranged between the third shuttle valve and the first air supply port, and the second exhaust valve is arranged between the fourth shuttle valve and the second air supply port.

5. The blowout preventer control device with a pressure regulating function according to claim 4, characterized in that, A first silencer is connected to the exhaust port of the first exhaust valve, and a second silencer is connected to the exhaust port of the second exhaust valve.

6. A blowout preventer control system, characterized in that, Comprising: A fluid transfer valve and the blowout preventer control device with a pressure regulating function according to any one of claims 1-5; The hydraulic power fluid source is connected to the blowout preventer through the fluid transfer valve, and the fluid transfer valve is used to control the switch and direction of the power fluid flowing into the blowout preventer. The pressure regulating valve in the blowout preventer control device with a pressure regulating function is arranged between the hydraulic power fluid source and the fluid transfer valve.

7. A blowout preventer system, characterized in that, Comprising: A blowout preventer, a hydraulic power fluid source, a fluid transfer valve, and the blowout preventer control device with a pressure regulating function according to any one of claims 1-5; The hydraulic power fluid source is connected to the blowout preventer through the fluid transfer valve, and the fluid transfer valve is used to control the switch and direction of the power fluid flowing into the blowout preventer. The pressure regulating valve in the blowout preventer control device with a pressure regulating function is arranged between the hydraulic power fluid source and the fluid transfer valve.

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