An electro-hydraulic integrated valve group structure for double blowout preventer box control and its use method

Abstract

The present invention relates to an electro-hydraulic integrated valve group structure for controlling a double blowout preventer box and a method for using the same, and belongs to the technical field of continuous oil pipe equipment. The P1 port is sequentially connected to the blowout preventer box one quick clamping solenoid valve a (3-1), the one-way valve one (3-2), the one-way valve b (3-3) of the blowout preventer box one and the rodless chamber of the blowout preventer box one (1-4), and the rod chamber of the blowout preventer box one is sequentially connected to the one-way valve a of the blowout preventer box one, the T port of the double blowout preventer box electro-hydraulic integrated valve group and the hydraulic oil tank. The P2 port is sequentially connected to the two-way valve b of the blowout preventer box two quick clamping solenoid valve, the one-way valve two, the two-way valve b of the blowout preventer box two and the rodless chamber of the blowout preventer box two, and the rod chamber of the blowout preventer box two is sequentially connected to the one-way valve a of the blowout preventer box two, the T port of the double blowout preventer box electro-hydraulic integrated valve group and the hydraulic oil tank. The present invention has a compact layout and reduced costs, and can also meet the zero leakage requirements of the double blowout preventer box control system.

Description

Technical Field

[0001] The invention relates to an electro-hydraulic integrated valve group structure for controlling a double blowout preventer box and a use method thereof, belonging to the technical field of coiled tubing equipment. Background Art

[0002] The blowout preventer is a key part of the coiled tubing equipment. Its main purpose is to control the wellhead pressure during the operation, effectively prevent blowout accidents and achieve safe construction.

[0003] At present, the mainstream control method of the blowout preventer in domestic continuous tubing equipment is to use a zero-leakage manual ball valve to control the compression and loosening of the blowout preventer actuator hydraulic cylinder. At present, the power system source of the blowout preventer mainly includes two methods, namely, the fast clamping control method in which the constant pressure pump provides the power oil source, and the gas-liquid booster control method in which the pneumatic booster pump provides the power oil source. The fast clamping control method means that the oil output by the constant pressure pump is directly delivered to the blowout preventer cylinder through the fast clamping control ball valve, and the blowout preventer rubber core is quickly clamped. The maximum pressure of the constant pressure pump is generally 3000psi. The operator needs to determine the wellhead pressure that the blowout preventer can seal according to the corresponding curve chart; the pneumatic booster pump control method, the biggest feature of the pneumatic booster pump is that it can raise the oil to a higher pressure. When the wellhead pressure is high, the oil pressure provided by the constant pressure pump is not enough. At this time, the blowout preventer pressure adjustment knob on the control panel is required. The knob adjusts the intake pressure of the pneumatic booster pump.

[0004] The fundamental problems with the above-mentioned purely hydraulic control operation mode are: very high requirements for valve sealing, a large number of valve components, the use of customized hydraulic control reversing valves with handle operation, the hydraulic components and pipeline layout occupy a large space in the control cabin, and it is not easy to troubleshoot when a hydraulic system fails. Summary of the invention

[0005] The purpose of the present invention is to provide an electro-hydraulic integrated valve group structure for controlling a dual blowout preventer box and a method of using the same. In addition to meeting the basic requirements of traditional blowout preventer box hydraulic control operations, the valve group structure can also meet the zero leakage requirements of the dual blowout preventer box control system. The valve group layout that constitutes the system is simple and compact, which can meet the requirements of intelligent and integrated control systems and solve the above-mentioned problems existing in the background technology.

[0006] The technical solution of the present invention is:

[0007] An electro-hydraulic integrated valve group structure for controlling a double blowout preventer box, comprising a pressure-compensating variable pump, a speed regulating valve group, a double blowout preventer box electro-hydraulic integrated valve group, a blowout preventer box 1 and a blowout preventer box 2, wherein the pressure-compensating variable pump is connected to the speed regulating valve group and is divided into two paths, which are respectively connected to the P1 port and the P2 port of the double blowout preventer box electro-hydraulic integrated valve group;

[0008] The double blowout preventer box electro-hydraulic integrated valve group includes a valve group body and a blowout preventer box 1 quick clamping solenoid valve a, a one-way valve, a blowout preventer box 1 clamping and releasing solenoid valve b, a blowout preventer box 1 clamping and releasing solenoid valve a, a blowout preventer box 2 quick clamping solenoid valve b, a one-way valve, a blowout preventer box 2 clamping and releasing solenoid valve b and a blowout preventer box 2 clamping and releasing solenoid valve a.

[0009] The P1 port is connected with the blowout box 1 quick clamping solenoid valve a, the one-way valve 1, the blowout box 1 clamping and releasing solenoid valve b and the rodless chamber of the blowout box 1 in sequence, and the rod chamber of the blowout box 1 is connected with the blowout box 1 clamping and releasing solenoid valve a, the T port of the double blowout box electro-hydraulic integrated valve group and the hydraulic oil tank in sequence to form the blowout box 1 oil circuit. By controlling the energization and de-energization operations of the blowout box 1 quick clamping solenoid valve a, the blowout box 1 clamping and releasing solenoid valve b and the blowout box 1 clamping and releasing solenoid valve a, the conduction of the blowout box 1 oil circuit is controlled to realize the clamping and releasing control of the blowout boxes 1-4;

[0010] The P2 port is connected with the blowout box 2 quick clamping solenoid valve b, the one-way valve 2, the blowout box 2 clamping and releasing solenoid valve b and the rodless chamber of the blowout box 2 in sequence, and the rod chamber of the blowout box 2 is connected with the blowout box 2 clamping and releasing solenoid valve a, the T port of the double blowout box electro-hydraulic integrated valve group and the hydraulic oil tank in sequence to form the blowout box 2 oil circuit, and the through hole controls the energization and de-energization actions of the blowout box 2 quick clamping solenoid valve b, the blowout box 2 clamping and releasing solenoid valve b and the blowout box 2 clamping and releasing solenoid valve a in the double blowout box electro-hydraulic integrated valve group to control the conduction of the blowout box 2 oil circuit to realize the clamping and releasing control of the blowout box 2.

[0011] Further, it also includes a pneumatic liquid booster pump, which is connected to the P3 port of the double blowout preventer box electro-hydraulic integrated valve group. The double blowout preventer box electro-hydraulic integrated valve group also includes a blowout preventer box selection solenoid valve a and a blowout preventer box selection solenoid valve b integrated and inserted on the valve group body. The blowout preventer box selection solenoid valve a and the blowout preventer box selection solenoid valve b are connected in parallel at the rear end of the P3 port. The blowout preventer box selection solenoid valve a is connected to the rod chamber of the blowout preventer box one through the clamping and releasing solenoid valve a of the blowout preventer box one, and the blowout preventer box selection solenoid valve a is connected to the rodless chamber of the blowout preventer box one through the clamping and releasing solenoid valve b of the blowout preventer box one; the blowout preventer box selection solenoid valve b is connected to the rodless chamber of the blowout preventer box two through the clamping and releasing solenoid valve b of the blowout preventer box two, and the blowout preventer box selection solenoid valve b is connected to the rod chamber of the blowout preventer box two through the clamping and releasing solenoid valve a of the blowout preventer box two;

[0012] The hydraulic oil of the pneumatic liquid booster pump enters the P3 port of the double blowout preventer box electro-hydraulic integrated valve group. When the solenoid b of the blowout preventer box selection solenoid valve b loses power, the 1st and 2nd ports of the blowout preventer box selection solenoid valve b are normally closed, and the oil circuit is blocked. The solenoid a of the blowout preventer box selection solenoid valve a loses power, and the 1st and 2nd ports of the blowout preventer box selection solenoid valve a are normally open. The hydraulic oil flows through the blowout preventer box selection solenoid valve b and enters from the 1st port of the blowout preventer box selection solenoid valve a. After flowing out from the 2nd port of the blowout preventer box selection solenoid valve a, it is divided into two paths and enters the P port of the blowout preventer box clamping and releasing solenoid valve a and the P port of the blowout preventer box clamping and releasing solenoid valve b to stand by. By controlling the on-off of the solenoid a of the blowout preventer box clamping and releasing solenoid valve a and the solenoid b of the blowout preventer box clamping and releasing solenoid valve b, the hydraulic oil is realized. Corresponding to the clamping and loosening control of the blowout preventer box 1; when the solenoid b of the blowout preventer box selection solenoid valve b is energized, the 1st and 2nd ports of the blowout preventer box selection solenoid valve b are normally connected, the solenoid a of the blowout preventer box selection solenoid valve a is energized, the 1st and 2nd ports of the blowout preventer box selection solenoid valve a are normally closed, the oil circuit is blocked, the hydraulic oil flows through the blowout preventer box selection solenoid valve b, enters from the 1st port of the blowout preventer box selection solenoid valve b, and flows out from the 2nd port of the blowout preventer box selection solenoid valve b and is divided into two paths, respectively entering the P port of the clamping and loosening solenoid valve b of the blowout preventer box 2 and the P port of the clamping and loosening solenoid valve a of the blowout preventer box 2 to stand by, and the clamping and loosening control of the blowout preventer box 2 is realized by controlling the on and off of the solenoid b of the clamping and loosening solenoid valve b of the blowout preventer box 2 and the solenoid a of the clamping and loosening solenoid valve a of the blowout preventer box 2.

[0013] Furthermore, the blowout preventer box 1 quick clamping solenoid valve a, the blowout preventer box 2 quick clamping solenoid valve b, the blowout preventer box selection solenoid valve a and the blowout preventer box selection solenoid valve b are all two-position two-way solenoid valves.

[0014] Furthermore, the blowout preventer box 1 clamping and releasing solenoid valve b, the blowout preventer box 1 clamping and releasing solenoid valve a, the blowout preventer box 2 clamping and releasing solenoid valve b and the blowout preventer box 2 clamping and releasing solenoid valve a are all zero-leakage electromagnetic reversing ball valves.

[0015] The method for using the electro-hydraulic integrated valve group structure for controlling the double blowout preventer box is as follows: The hydraulic oil provided by the pressure-compensated variable pump enters the speed regulating valve group, and is divided into two paths after the speed regulating valve group performs speed regulation and diversion, and respectively enters the P1 port and the P2 port of the electro-hydraulic integrated valve group of the double blowout preventer box to form the following circuit;

[0016] ① Spray box-quick compression circuit:

[0017] When the electromagnet b of the blowout preventer box 1 clamping and releasing solenoid valve b and the electromagnet a of the blowout preventer box 1 clamping and releasing solenoid valve a lose power at the same time, the oil cylinder of the blowout preventer box 1 is in the fast clamping position;

[0018] When the hydraulic oil enters the P1 port, the electromagnet a of the blowout preventer box 1 fast clamping solenoid valve a is controlled to be energized, and the blowout preventer box 1 fast clamping solenoid valve a is reversed. At this time, the liquid flows from the P1 port into the 1 port of the blowout preventer box 1 fast clamping solenoid valve a, and then flows out from the 2 port of the blowout preventer box 1 fast clamping solenoid valve a, and enters the one-way valve 1. The liquid flow overcomes the spring preload force of the one-way valve 1, opens the liquid flow path of the one-way valve 1, and enters the P port of the clamping and releasing solenoid valve b of the blowout preventer box 1 to wait. At this time, the electromagnet b of the clamping and releasing solenoid valve b of the blowout preventer box 1 loses power. In the initial state, relying on the spring preload force, the clamping and releasing solenoid valve b of the blowout preventer box 1 works in the left position, and the P port and the A port of the clamping and releasing solenoid valve b of the blowout preventer box 1 are always connected. The liquid flows through the P port of the spray preventer box 1 clamping and releasing solenoid valve b and flows through the A port to enter the rodless chamber of the spray preventer box 1. The return oil of the rod chamber of the spray preventer box 1 enters the A port of the spray preventer box 1 clamping and releasing solenoid valve a to stand by. At this time, the electromagnet a of the spray preventer box 1 clamping and releasing solenoid valve a loses power. In the initial state, relying on the spring preload force, the spray preventer box 1 clamping and releasing solenoid valve a works in the right position. The A port and the T port of the spray preventer box 1 clamping and releasing solenoid valve a are always connected. At this time, the hydraulic oil of the rod chamber of the spray preventer box 1 flows through the A port of the spray preventer box 1 clamping and releasing solenoid valve a, and then enters the T port of the double spray preventer box electro-hydraulic integrated valve group through the T port of the spray preventer box 1 clamping and releasing solenoid valve a, and flows back to the hydraulic oil tank. This cycle realizes the spray preventer box 1 fast compression circuit cycle;

[0019] ②Spray box quick release circuit:

[0020] When the electromagnet b of the solenoid valve b for clamping and releasing the blowout preventer box 1 and the electromagnet a of the solenoid valve a for clamping and releasing the blowout preventer box 1 are energized at the same time, the oil cylinder of the blowout preventer box 1 is in the quick release position;

[0021] When the hydraulic oil enters the P1 port, the electromagnet a of the blowout preventer box 1 fast clamping solenoid valve a is controlled to be energized, and the blowout preventer box 1 fast clamping solenoid valve a is reversed. At this time, the liquid flows from the P1 port into the 1 port of the blowout preventer box 1 fast clamping solenoid valve a, and then flows out from the 2 port of the blowout preventer box 1 fast clamping solenoid valve a, and enters the one-way valve 1. The liquid flow overcomes the spring preload force of the one-way valve 1, opens the liquid flow path of the one-way valve 1, and enters the P port of the blowout preventer box 1 clamping and releasing solenoid valve b. At this time, the electromagnet b of the blowout preventer box 1 clamping and releasing solenoid valve b is operated to be energized, and the blowout preventer box 1 clamping and releasing solenoid valve b is reversed. At this time, the outlet of the one-way valve 1 is divided into two paths. Because the P port of the blowout preventer box 1 clamping and releasing solenoid valve b is closed, one of the paths is blocked from the P port oil path of the blowout preventer box 1 clamping and releasing solenoid valve b, and the other path enters the blowout preventer box 1 clamping and releasing solenoid valve b. Release the P port of solenoid valve a. At this time, operate the electromagnet a of the clamping and releasing solenoid valve a of the blowout preventer box to energize it, and the clamping and releasing solenoid valve a of the blowout preventer box changes direction. The clamping and releasing solenoid valve a of the blowout preventer box works in the left position. The P port and the A port of the clamping and releasing solenoid valve a of the blowout preventer box are always connected. The liquid flows through the P port of the clamping and releasing solenoid valve a of the blowout preventer box, flows through the A port and enters the rod chamber of the blowout preventer box, and the return oil of the rodless chamber of the blowout preventer box enters the A port of the clamping and releasing solenoid valve b of the blowout preventer box to stand by. At this time, the clamping and releasing solenoid valve b of the blowout preventer box works in the right position. The A port and the T port of the clamping and releasing solenoid valve b of the blowout preventer box are always connected. The liquid flows through the A port of the clamping and releasing solenoid valve b of the blowout preventer box, flows through the T port and enters the T port of the double blowout preventer box electro-hydraulic integrated valve group, and flows back to the hydraulic oil tank. This cycle realizes the rapid release circuit cycle of the blowout preventer box;

[0022] ③ Blowout prevention box-mid-position floating circuit

[0023] When the electromagnet b of the solenoid valve b for clamping and releasing the blowout preventer box 1 is energized and the electromagnet a of the solenoid valve a for clamping and releasing the blowout preventer box 1 is de-energized, the oil cylinder of the blowout preventer box 1 is in the floating middle position;

[0024] When the electromagnet a of the first clamping and releasing solenoid valve a of the blowout preventer box loses power, the first clamping and releasing solenoid valve a of the blowout preventer box is in the initial position, the A port and the T port of the first clamping and releasing solenoid valve a of the blowout preventer box are connected, and the liquid flow in the rod chamber of the blowout preventer box passes through the A port and the T port of the first clamping and releasing solenoid valve a of the blowout preventer box, and flows back to the hydraulic oil tank through the T port of the double blowout preventer box electro-hydraulic integrated valve group;

[0025] At this time, the electromagnet b of the clamping and releasing solenoid valve b of the blowout preventer box is energized, the clamping and releasing solenoid valve b of the blowout preventer box is reversed, and the A port and the T port of the clamping and releasing solenoid valve b of the blowout preventer box are connected. At this time, the liquid flow of the rodless chamber of the blowout preventer box passes through the A port and the T port of the clamping and releasing solenoid valve b of the blowout preventer box, and flows back to the hydraulic oil tank through the T port of the double blowout preventer box electro-hydraulic integrated valve group;

[0026] In this way, the rod chamber and the rodless chamber of the blowout preventer box 1 are both connected to the hydraulic oil tank, and the clamping cylinder of the blowout preventer box 1 is in a floating middle position state;

[0027] ④ Spray box second quick compression circuit:

[0028] When the electromagnet b of the second blowout preventer box clamping and releasing solenoid valve b and the electromagnet a of the second blowout preventer box clamping and releasing solenoid valve a lose power at the same time, the oil cylinder of the second blowout preventer box is in the fast clamping position;

[0029] When the hydraulic oil enters the P2 port, the electromagnet b of the second quick clamping solenoid valve b of the blowout preventer box is controlled to be energized, and the second quick clamping solenoid valve b of the blowout preventer box is reversed. At this time, the liquid flows from the P2 port into the 1 port of the second quick clamping solenoid valve b of the blowout preventer box, and then flows out from the 2 port of the second quick clamping solenoid valve b of the blowout preventer box, and enters the one-way valve 2. The liquid flow overcomes the spring preload force of the one-way valve 2, opens the liquid flow path of the one-way valve 2, and enters the P port of the clamping and releasing solenoid valve b of the blowout preventer box 2 to stand by. At this time, the electromagnet b of the clamping and releasing solenoid valve b of the blowout preventer box 2 loses power. In the initial state, relying on the spring preload force, the clamping and releasing solenoid valve b of the blowout preventer box 2 works in the left position, and the P port and the A port of the clamping and releasing solenoid valve b of the blowout preventer box 2 are always connected. The liquid flows through the P port of the second clamping and releasing solenoid valve b of the spray preventer box, flows through the A port and enters the rodless chamber of the second spray preventer box, and the return oil of the rod chamber of the second spray preventer box enters the A port of the second clamping and releasing solenoid valve a of the spray preventer box to stand by. At this time, the electromagnet a of the second clamping and releasing solenoid valve a of the spray preventer box loses power. In the initial state, relying on the spring preload force, the second clamping and releasing solenoid valve a of the spray preventer box works in the right position, and the A port and the T port of the second clamping and releasing solenoid valve a of the spray preventer box are always connected. At this time, the hydraulic oil of the rod chamber of the second spray preventer box flows through the A port of the second clamping and releasing solenoid valve a of the spray preventer box, and then enters the T port of the double spray preventer box electro-hydraulic integrated valve group through the T port of the second clamping and releasing solenoid valve a of the spray preventer box, and flows back to the hydraulic oil tank. This cycle realizes the rapid compression circuit cycle of the first spray preventer box;

[0030] ⑤ Anti-spray box second quick release circuit:

[0031] When the electromagnet b of the second blowout preventer box clamping and releasing solenoid valve b and the electromagnet a of the second blowout preventer box clamping and releasing solenoid valve a are energized at the same time, the oil cylinder of the second blowout preventer box is in the quick release position;

[0032] When the hydraulic oil enters the P2 port, the electromagnet b of the second quick clamping solenoid valve b of the blowout preventer box is controlled to be energized, and the second quick clamping solenoid valve b of the blowout preventer box is controlled to be reversed. At this time, the liquid flows from the P2 port into the 1 port of the second quick clamping solenoid valve b of the blowout preventer box, and then flows out from the 2 port of the second quick clamping solenoid valve b of the blowout preventer box, and enters the one-way valve 2. The liquid flow overcomes the spring preload force of the one-way valve 2, opens the liquid flow path of the one-way valve 2, and enters the P port of the clamping and releasing solenoid valve b of the blowout preventer box 2. At this time, the electromagnet b of the clamping and releasing solenoid valve b of the blowout preventer box 2 is operated to be energized, and the clamping and releasing solenoid valve b of the blowout preventer box 2 is reversed. At this time, the outlet of the one-way valve 2 is divided into two paths. Because the P port of the clamping and releasing solenoid valve b of the blowout preventer box 2 is closed, one of the paths is blocked from the P port oil path of the clamping and releasing solenoid valve b of the blowout preventer box 2, and the other path enters the clamping of the blowout preventer box 2 Tighten and release the P port of solenoid valve a. At this time, operate the electromagnet a of the second clamping and releasing solenoid valve a of the spray preventer box to energize it, and the second clamping and releasing solenoid valve a of the spray preventer box changes direction. The second clamping and releasing solenoid valve a of the spray preventer box works in the left position. The P port and the A port of the second clamping and releasing solenoid valve a of the spray preventer box are always connected. The liquid flows through the P port of the second clamping and releasing solenoid valve a of the spray preventer box, flows through the A port and enters the rod chamber of the second spray preventer box, and the return oil of the rodless chamber of the second spray preventer box enters the A port of the second clamping and releasing solenoid valve b of the spray preventer box to stand by. At this time, the second clamping and releasing solenoid valve b of the spray preventer box works in the right position. The A port and the T port of the second clamping and releasing solenoid valve b of the spray preventer box are always connected. The liquid flows through the A port of the second clamping and releasing solenoid valve b of the spray preventer box, flows through the T port and enters the T port of the double spray preventer box electro-hydraulic integrated valve group, and flows back to the hydraulic oil tank. This cycle realizes the rapid release circuit cycle of the second spray preventer box;

[0033] ⑥ Second middle floating circuit of the blowout prevention box

[0034] When the electromagnet b of the second blowout preventer box clamping and releasing solenoid valve b is energized and the electromagnet a of the second blowout preventer box clamping and releasing solenoid valve a is de-energized, the oil cylinder of the second blowout preventer box is in the floating middle position;

[0035] When the electromagnet a of the second clamping and releasing solenoid valve a of the blowout preventer box loses power, the second clamping and releasing solenoid valve a of the blowout preventer box is in the initial position, the A port and the T port of the second clamping and releasing solenoid valve a of the blowout preventer box are connected, and the liquid flow in the rod chamber of the blowout preventer box passes through the A port and the T port of the second clamping and releasing solenoid valve a of the blowout preventer box, and flows back to the hydraulic oil tank through the T port of the double blowout preventer box electro-hydraulic integrated valve group;

[0036] At this time, the electromagnet b of the second clamping and releasing solenoid valve b of the blowout preventer box is energized, the second clamping and releasing solenoid valve b of the blowout preventer box is reversed, and the A port and the T port of the second clamping and releasing solenoid valve b of the blowout preventer box are connected. At this time, the liquid flow of the rodless chamber of the blowout preventer box passes through the A port and the T port of the second clamping and releasing solenoid valve b of the blowout preventer box, and flows back to the hydraulic oil tank through the T port of the double blowout preventer box electro-hydraulic integrated valve group;

[0037] In this way, the rod chamber and the rodless chamber of the second blowout preventer box are both connected to the hydraulic oil tank, and the clamping cylinder of the second blowout preventer box is in a floating middle position state.

[0038] When the equipment is in deep well operation, as the well pressure continues to rise, the system pressure set by the pressure compensation variable pump 1-1 alone is not enough to ensure the clamping and sealing of the first and second rubber cores of the blowout preventer box. At this time, the pneumatic liquid booster pump needs to be operated separately. The hydraulic oil output by the pneumatic liquid booster pump enters through the P3 port of the double blowout preventer box electro-hydraulic integrated valve group. When the hydraulic oil flows through the P3 port, it enters the blowout preventer box selection solenoid valve a and the blowout preventer box selection solenoid valve b in two ways. The blowout preventer box selection solenoid valve b is in the normally closed position, and the blowout preventer box selection solenoid valve a is in the normally open position.

[0039] When the electromagnet b of the blowout box selection solenoid valve b loses power, the ports 1 and 2 of the blowout box selection solenoid valve b are normally closed, the oil circuit is blocked, the electromagnet a of the blowout box selection solenoid valve a loses power, the ports 1 and 2 of the blowout box selection solenoid valve a are normally open, the liquid flows through the blowout box selection solenoid valve a, enters from the port 1 of the blowout box selection solenoid valve a, flows out from the port 2 of the blowout box selection solenoid valve a, and respectively enters the P port of the blowout box one clamping and releasing solenoid valve a and the P port of the blowout box one clamping and releasing solenoid valve b to stand by, and the clamping and releasing control of the corresponding blowout box one is realized by controlling the on and off of the electromagnet a of the blowout box one clamping and releasing solenoid valve a and the electromagnet b of the blowout box one clamping and releasing solenoid valve b;

[0040] When the electromagnet b of the blowout preventer box selection solenoid valve b is energized, the 1st and 2nd ports of the blowout preventer box selection solenoid valve b are normally connected, the electromagnet a of the blowout preventer box selection solenoid valve a is energized, the 1st and 2nd ports of the blowout preventer box selection solenoid valve a are normally closed, the oil circuit is blocked, the liquid flows through the blowout preventer box selection solenoid valve b, enters from the 1st port of the blowout preventer box selection solenoid valve b, flows out from the 2nd port of the blowout preventer box selection solenoid valve b, and respectively enters the P port of the blowout preventer box second clamping and releasing solenoid valve b and the P port of the blowout preventer box second clamping and releasing solenoid valve a to stand by, and the clamping and releasing control of the blowout preventer box two is realized by controlling the on and off of the electromagnet b of the blowout preventer box second clamping and releasing solenoid valve b and the electromagnet a of the blowout preventer box second clamping and releasing solenoid valve a.

[0041] The positive effects of the present invention are as follows: the traditional manual hydraulically controlled blowout preventer box operation scheme is replaced by a double blowout preventer box electro-hydraulic integrated valve group, the control oil route is changed from hydraulic control to electric control, the whole valve group has a compact structure, the control oil channels are all integrated inside the double blowout preventer box electro-hydraulic integrated valve group, complex peripheral lines are eliminated, the layout is compact, the cost is reduced, and at the same time, the zero leakage requirement of the double blowout preventer box control system can be met. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the control oil circuit wiring of the present invention;

[0043] Figure 2 This is a schematic diagram of the structure of the double blowout prevention box electro-hydraulic integrated valve group of the present invention;

[0044] Figure 3 This is a schematic diagram of the internal hydraulic pressure of the double blowout prevention box electro-hydraulic integrated valve group of the present invention;

[0045] In the figure: pressure compensation variable pump 1-1, speed control valve group 1-2, double blowout preventer box electro-hydraulic integrated valve group 1-3, blowout preventer box 1 1-4, blowout preventer box 2 1-5, pneumatic liquid booster pump 1-6, valve group body 3-0, blowout preventer box 1 quick clamping solenoid valve a3-1, one-way valve 1 3-2, blowout preventer box 1 clamping and releasing solenoid valve b3-3, blowout preventer box 1 clamping and releasing solenoid valve a3-5, blowout preventer box 2 quick clamping solenoid valve b3-6, one-way valve 2 3-7, blowout preventer box 2 clamping and releasing solenoid valve b3-8, blowout preventer box 2 clamping and releasing solenoid valve a3-10, blowout preventer box selection solenoid valve a3-11, blowout preventer box selection solenoid valve b3-12. DETAILED DESCRIPTION

[0046] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0047] like Figure 1 As shown, this embodiment provides an electro-hydraulic integrated valve group structure for controlling a double blowout preventer box, comprising a pressure-compensating variable pump 1-1, a speed regulating valve group 1-2, a double blowout preventer box electro-hydraulic integrated valve group 1-3, a blowout preventer box 1-4, a blowout preventer box 2 1-5 and a pneumatic liquid booster pump 1-6. The pressure-compensating variable pump 1-1 is connected to the speed regulating valve group 1-2 and is divided into two paths, which are respectively connected to the P1 port and the P2 port of the double blowout preventer box electro-hydraulic integrated valve group 1-3.

[0048] In this embodiment, the double blowout preventer box electro-hydraulic integrated valve group 1-3 includes a valve group body 3-0 and a blowout preventer box one quick clamping solenoid valve a3-1, a one-way valve 3-2, a blowout preventer box one clamping and releasing solenoid valve b3-3, a blowout preventer box 1 clamping and releasing solenoid valve a3-5, a blowout preventer box two quick clamping solenoid valve b3-6, a one-way valve 3-7, a blowout preventer box two clamping and releasing solenoid valve b3-8, a blowout preventer box two clamping and releasing solenoid valve a3-10, a blowout preventer box selection solenoid valve a3-11 and a blowout preventer box selection solenoid valve b3-12.

[0049] The present invention replaces the traditional manual hydraulically controlled blowout preventer box with a double blowout preventer box electro-hydraulic integrated valve group, eliminating lengthy pipe joints, greatly reducing the number of installation components and connecting pipes for the entire integrated valve group, saving manufacturing time, and because of the reduction of system pollutants and leakage points and the reduction of assembly errors, the integrated valve group can realize the control function while significantly improving reliability.

[0050] Refer to the attached Figure 3The main control logic of the blowout box 1 of the present invention is as follows: the electromagnet b of the clamping and releasing electromagnetic valve b3-3 of the blowout box 1 and the electromagnet a of the clamping and releasing electromagnetic valve a3-5 of the blowout box 1 are both de-energized, and the oil cylinder of the blowout box 1 is compressed; the electromagnet b of the clamping and releasing electromagnetic valve b3-3 of the blowout box 1 and the electromagnet a of the clamping and releasing electromagnetic valve a3-5 of the blowout box 1 are both energized, and the oil cylinder of the blowout box 1 is released; the electromagnet b of the clamping and releasing electromagnetic valve b3-3 of the blowout box 1 is energized, and the electromagnet a of the clamping and releasing electromagnetic valve a3-5 of the blowout box 1 is de-energized, and the oil cylinder of the blowout box 1 is in the floating middle position. The main control logic of the blowout box 2 is the same as the main control logic of the blowout box 1.

[0051] The P1 port of the double blowout preventer box electro-hydraulic integrated valve group 1-3 is connected with the blowout preventer box one quick clamping solenoid valve a3-1, the one-way valve 3-2, the blowout preventer box one clamping and releasing solenoid valve b3-3 and the rodless chamber of the blowout preventer box one 1-4 in sequence, and the rod chamber of the blowout preventer box one 1-4 is connected with the blowout preventer box one clamping and releasing solenoid valve a3-5, the T port of the double blowout preventer box electro-hydraulic integrated valve group 1-3 and the hydraulic oil tank in sequence to form a blowout preventer box one oil circuit, and the conduction of the blowout preventer box one oil circuit is controlled by controlling the power-on and power-off operations of the blowout preventer box one quick clamping solenoid valve a3-1, the blowout preventer box one clamping and releasing solenoid valve b3-3 and the blowout preventer box one clamping and releasing solenoid valve a3-5, so as to realize the clamping and releasing control of the blowout preventer box one 1-4;

[0052] The P2 port of the double blowout box electro-hydraulic integrated valve group 1-3 is connected with the blowout box second quick clamping solenoid valve b3-6, the one-way valve second 3-7, the blowout box second clamping and releasing solenoid valve b3-8 and the rodless chamber of the blowout box second 1-5 in sequence, and the rod chamber of the blowout box second 1-5 is connected with the blowout box second clamping and releasing solenoid valve a 3-10, the T port of the double blowout box electro-hydraulic integrated valve group 1-3 and the hydraulic oil tank in sequence to form the blowout box second oil circuit, and the through hole controls the power-on and power-off actions of the blowout box second quick clamping solenoid valve b3-6, the blowout box second clamping and releasing solenoid valve b3-8 and the blowout box second clamping and releasing solenoid valve a 3-10 in the double blowout box electro-hydraulic integrated valve group 1-3, controls the conduction of the blowout box second oil circuit, and realizes the clamping and releasing control of the blowout box second 1-5.

[0053] When the equipment is in deep well operation, as the well pressure continues to increase, the system pressure set by the pressure compensation variable pump 1-1 alone is not enough to ensure the clamping and sealing of the blowout preventer rubber core. At this time, the pneumatic liquid booster pump 1-6 needs to be operated separately. The maximum output pressure of the pneumatic liquid booster pump 1-6 can reach 35Mpa. By adjusting the air source pressure of the system, the hydraulic output pressure of the pneumatic liquid booster pump 1-6 can be controlled, thereby meeting the special needs of the rising well pressure for the high clamping pressure of the blowout preventer rubber core.

[0054] The pneumatic liquid booster pump 1-6 is connected to the P3 port of the double blowout box electro-hydraulic integrated valve group 1-3, and the blowout box selection solenoid valve a3-11 and the blowout box selection solenoid valve b3-12 are connected in parallel at the rear end of the P3 port. The blowout box selection solenoid valve a3-11 is connected to the rod chamber of the blowout box 1-4 through the blowout box 1 clamping and releasing solenoid valve a3-5, and the blowout box selection solenoid valve a3-11 is connected to the rodless chamber of the blowout box 1-4 through the blowout box 1 clamping and releasing solenoid valve b3-3; the blowout box selection solenoid valve b3-12 is connected to the rodless chamber of the blowout box 2 1-5 through the blowout box 2 clamping and releasing solenoid valve b3-8, and the blowout box selection solenoid valve b3-12 is connected to the rod chamber of the blowout box 2 1-5 through the blowout box 2 clamping and releasing solenoid valve a3-10;

[0055] The hydraulic oil of the pneumatic liquid booster pump 1-6 enters the P3 port of the double blowout preventer electro-hydraulic integrated valve group 1-3. When the solenoid b of the blowout preventer selection solenoid valve b3-12 loses power, the 1st and 2nd ports of the blowout preventer selection solenoid valve b3-12 are normally closed, the oil circuit is blocked, the solenoid a of the blowout preventer selection solenoid valve a3-11 loses power, the 1st and 2nd ports of the blowout preventer selection solenoid valve a3-11 are normally open, and the hydraulic oil flows through the blowout preventer selection solenoid valve b3-12, enters from the 1st port of the blowout preventer selection solenoid valve a3-11, and is divided into two paths after flowing out from the 2nd port, respectively entering the P port of the blowout preventer first clamping and releasing solenoid valve a 3-5 and the P port of the blowout preventer first clamping and releasing solenoid valve b3-3 on standby, and by clamping and releasing the solenoid valve a The on-off control of the electromagnet a of 3-5 and the electromagnet b of the clamping and releasing solenoid valve b3-3 of the blowout box 1 realizes the clamping and releasing control of the corresponding blowout box 1-4; when the electromagnet b of the blowout box selection solenoid valve b3-12 is energized, the 1st and 2nd ports of the blowout box selection solenoid valve b3-12 are normally connected, the electromagnet a of the blowout box selection solenoid valve a3-11 is energized, the 1st and 2nd ports of the blowout box selection solenoid valve a3-11 are normally closed, the oil circuit is blocked, and the hydraulic oil flows through the blowout box selection solenoid valve b3-12, enters from the 1st port of the blowout box selection solenoid valve b3-12, and is divided into two paths after flowing out from the 2nd port, respectively entering the P port of the blowout box 2 clamping and releasing solenoid valve b3-8 and the blowout box 2 clamping and releasing solenoid valve a The P port of 3-10 is on standby, and the clamping and loosening control of the blowout preventer box 2 1-5 is realized by controlling the on-off of the electromagnet b of the blowout preventer box 2 clamping and loosening solenoid valve b3-8 and the electromagnet a of the blowout preventer box 2 clamping and loosening solenoid valve a 3-10.

[0056] In this embodiment, the blowout box 1 quick clamping solenoid valve a3-1, the blowout box 2 quick clamping solenoid valve b3-6, the blowout box selection solenoid valve a3-11 and the blowout box selection solenoid valve b3-12 are all two-position two-way solenoid valves.

[0057] The spray box 1 clamping and releasing solenoid valve b3-3, spray box 1 clamping and releasing solenoid valve a3-5, spray box 2 clamping and releasing solenoid valve b3-8 and spray box 2 clamping and releasing solenoid valve a3-10 are all zero-leakage electromagnetic reversing ball valves.

[0058] The method for using the electro-hydraulic integrated valve group structure for controlling the double blowout preventer box is as follows: when the pressure compensation variable pump 1-1 is in operation, the system is operated in a constant pressure mode of 21Mpa, and the hydraulic oil provided by the pressure compensation variable pump 1-1 enters the speed regulating valve group 1-2, and is divided into two paths after the speed regulating valve group 1-2 performs speed regulation and diversion, and respectively enters the P1 port and the P2 port of the double blowout preventer box electro-hydraulic integrated valve group 1-3 to form the following circuit;

[0059] ① Spray box-quick compression circuit:

[0060] When the electromagnet b of the blowout box clamping and releasing solenoid valve b3-3 and the electromagnet a of the blowout box clamping and releasing solenoid valve a3-5 lose power at the same time, the oil cylinder of the blowout box 1-4 is in the fast pressing position;

[0061] When the hydraulic oil enters the P1 port, the electromagnet a of the blowout box quick clamping solenoid valve a3-1 is controlled to be energized, and the blowout box quick clamping solenoid valve a3-1 is reversed. At this time, the liquid flows from the P1 port into the 1 port of the blowout box quick clamping solenoid valve a3-1, and then flows out from the 2 port of the blowout box quick clamping solenoid valve a3-1, and enters the one-way valve 3-2. The liquid flow overcomes the spring preload of the one-way valve 3-2, opens the liquid flow path of the one-way valve 3-2, and enters the P port of the blowout box clamping and releasing solenoid valve b3-3 to stand by. At this time, the electromagnet b of the blowout box clamping and releasing solenoid valve b3-3 loses power. In the initial state, relying on the spring preload, the blowout box clamping and releasing solenoid valve b3-3 works in the left position, and the P port and the A port of the blowout box clamping and releasing solenoid valve b3-3 are always connected. The liquid flows through the P port of the spray box clamping and releasing solenoid valve b3-3, flows through the A port and enters the rodless chamber of the spray box 1-4, and the return oil of the rod chamber of the spray box 1-4 enters the A port of the spray box clamping and releasing solenoid valve a3-5 to stand by. At this time, the electromagnet a of the spray box clamping and releasing solenoid valve a3-5 loses power. In the initial state, relying on the spring preload force, the spray box clamping and releasing solenoid valve a3-5 works in the right position, and the A port and T port of the spray box clamping and releasing solenoid valve a3-5 are always connected. At this time, the hydraulic oil of the rod chamber of the spray box 1-4 flows through the A port of the spray box clamping and releasing solenoid valve a3-5, and then enters the T port of the double spray box electro-hydraulic integrated valve group 1-3 through the T port of the spray box clamping and releasing solenoid valve a3-5, and flows back to the hydraulic oil tank. This cycle realizes the spray box fast compression circuit cycle;

[0062] ②Spray box quick release circuit:

[0063] When the electromagnet b of the blowout box 1 clamping and releasing solenoid valve b3-3 and the electromagnet a of the blowout box 1 clamping and releasing solenoid valve a3-5 are energized at the same time, the oil cylinder of the blowout box 1-4 is in the quick release position;

[0064] When the hydraulic oil enters the P1 port, the electromagnet a of the blowout preventer box quick clamping solenoid valve a3-1 is controlled to be energized, and the blowout preventer box quick clamping solenoid valve a3-1 is reversed. At this time, the liquid flows from the P1 port into the 1 port of the blowout preventer box quick clamping solenoid valve a3-1, and then flows out from the 2 port of the blowout preventer box quick clamping solenoid valve a3-1, and enters the one-way valve 3-2. The liquid flow overcomes the spring preload force of the one-way valve 3-2, opens the liquid flow of the one-way valve 3-2 The oil of the blowout box is clamped and released by the electromagnetic valve b3-3. At this time, the electromagnetic iron b of the blowout box is operated to energize it, and the blowout box is clamped and released by the electromagnetic valve b3-3. At this time, the outlet of the one-way valve 3-2 is divided into two ways. Because the P port of the blowout box is clamped and released by the electromagnetic valve b3-3 is closed, one of the ways is blocked from the oil of the P port of the blowout box, and the other way enters the blowout box. The P port of the solenoid valve a3-5, at this time, operate the electromagnet a of the spray box clamping and releasing solenoid valve a3-5 to energize it, the spray box clamping and releasing solenoid valve a3-5 changes direction, the spray box clamping and releasing solenoid valve a3-5 works in the left position, the P port of the spray box clamping and releasing solenoid valve a3-5 is always connected with the A port, the liquid flows through the P port of the spray box clamping and releasing solenoid valve a3-5 through the A port into the rod chamber of the spray box 1-4, the spray box 1-4 The return oil of the rodless chamber enters the A port of the blowout preventer box-1 clamping and releasing solenoid valve b3-3 and stands by. At this time, the blowout preventer box-1 clamping and releasing solenoid valve b3-3 works in the right position, and the A port and T port of the blowout preventer box-1 clamping and releasing solenoid valve b3-3 are always connected. The liquid flows through the A port of the blowout preventer box-1 clamping and releasing solenoid valve b3-3, flows through the T port, enters the T port of the double blowout preventer box electro-hydraulic integrated valve group 1-3, and flows back to the hydraulic oil tank. This cycle realizes the rapid release circuit cycle of the blowout preventer box-1-4;

[0065] ③Spray box-mid-position floating circuit

[0066] When the electromagnet b of the blowout preventer box 1 clamping and releasing solenoid valve b3-3 is energized and the electromagnet a of the blowout preventer box 1 clamping and releasing solenoid valve a3-5 is de-energized, the oil cylinder of the blowout preventer box 1 is in the floating middle position;

[0067] When the electromagnet a of the first clamping and releasing solenoid valve a3-5 of the blowout preventer box loses power, the first clamping and releasing solenoid valve a3-5 of the blowout preventer box is in the initial position, the A port and the T port of the first clamping and releasing solenoid valve a3-5 of the blowout preventer box are connected, and the rod chamber fluid of the blowout preventer box 1-4 flows through the A port and the T port of the first clamping and releasing solenoid valve a3-5 of the blowout preventer box, and flows back to the hydraulic oil tank through the T port of the double blowout preventer box electro-hydraulic integrated valve group 1-3;

[0068] At this time, the electromagnet b of the first clamping and releasing solenoid valve b3-3 of the blowout preventer box is energized, the first clamping and releasing solenoid valve b3-3 of the blowout preventer box is reversed, and the A port and the T port of the first clamping and releasing solenoid valve b3-3 of the blowout preventer box are connected. At this time, the liquid flow of the rodless chamber of the blowout preventer box 1-4 passes through the A port and the T port of the first clamping and releasing solenoid valve b3-3 of the blowout preventer box, and flows back to the hydraulic oil tank through the T port of the double blowout preventer box electro-hydraulic integrated valve group 1-3;

[0069] In this way, the rod chamber and the rodless chamber of the blowout prevention box 1-4 are both connected to the hydraulic oil tank, and the clamping cylinder of the blowout prevention box 1-4 is in a floating middle position state;

[0070] ④ Spray box second quick compression circuit:

[0071] When the electromagnet b of the second blowout box clamping and releasing solenoid valve b3-8 and the electromagnet a of the second blowout box clamping and releasing solenoid valve a 3-10 lose power at the same time, the oil cylinder of the second blowout box 1-5 is in the fast clamping position;

[0072] When the hydraulic oil enters the P2 port, the electromagnet b of the second quick clamping solenoid valve b3-6 of the blowout preventer box is controlled to be energized, and the second quick clamping solenoid valve b3-6 of the blowout preventer box is reversed. At this time, the liquid flows from the P2 port into the 1 port of the second quick clamping solenoid valve b3-6 of the blowout preventer box, and then flows out from the 2 port of the second quick clamping solenoid valve b3-6 of the blowout preventer box, and enters the one-way valve 3-7. The liquid flow overcomes the spring preload force of the one-way valve 3-7, opens the liquid flow path of the one-way valve 3-7, and enters the second clamping and releasing solenoid valve of the blowout preventer box. The P port of the magnetic valve b3-8 is on standby. At this time, the electromagnet b of the second clamping and releasing electromagnetic valve b3-8 of the spray preventer box loses power. In the initial state, relying on the spring preload force, the second clamping and releasing electromagnetic valve b3-8 of the spray preventer box works in the left position. The P port and the A port of the second clamping and releasing electromagnetic valve b3-8 of the spray preventer box are always connected. The liquid flows through the P port of the second clamping and releasing electromagnetic valve b3-8 of the spray preventer box, flows through the A port and enters the rodless cavity of the second spray preventer box 1-5. The return oil of the rod cavity of the second spray preventer box 1-5 enters the second clamping and releasing electromagnetic valve a of the spray preventer box The A port of 3-10 is on standby. At this time, the electromagnet a of the second clamping and releasing solenoid valve a 3-10 of the blowout box loses power. In the initial state, relying on the spring preload, the second clamping and releasing solenoid valve a 3-10 of the blowout box works in the right position. The A port and T port of the second clamping and releasing solenoid valve a 3-10 of the blowout box are always connected. At this time, the hydraulic oil in the rod chamber of the second blowout box 1-5 flows through the A port of the second clamping and releasing solenoid valve a 3-10 of the blowout box, and then enters the T port of the double blowout box electro-hydraulic integrated valve group 1-3 through the T port of the second clamping and releasing solenoid valve a 3-10 of the blowout box, and flows back to the hydraulic oil tank. This cycle realizes the rapid compression loop cycle of the blowout box one;

[0073] ⑤ Anti-spray box second quick release circuit:

[0074] When the electromagnet b of the second blowout box clamping and releasing solenoid valve b3-8 and the electromagnet a of the second blowout box clamping and releasing solenoid valve a 3-10 are energized at the same time, the oil cylinder of the second blowout box 1-5 is in the quick release position;

[0075] When the hydraulic oil enters the P2 port, the electromagnet b of the second quick clamping solenoid valve b3-6 of the blowout preventer box is controlled to be energized, and the second quick clamping solenoid valve b3-6 of the blowout preventer box is controlled to be reversed. At this time, the liquid flows from the P2 port into the 1st port of the second quick clamping solenoid valve b3-6 of the blowout preventer box, and then flows out from the 2nd port of the second quick clamping solenoid valve b3-6 of the blowout preventer box, and enters the one-way valve 3-7. The liquid flow overcomes the spring preload of the one-way valve 3-7 and opens the liquid flow passage of the one-way valve 3-7. , enter the P port of the second clamping and releasing solenoid valve b3-8 of the spray preventer box. At this time, operate the electromagnet b of the second clamping and releasing solenoid valve b3-8 of the spray preventer box to energize it, and the second clamping and releasing solenoid valve b3-8 of the spray preventer box is reversed. At this time, the outlet of the one-way valve 2 3-7 is divided into two ways. Because the P port of the second clamping and releasing solenoid valve b3-8 of the spray preventer box is closed, one of the ways is blocked from the P port oil circuit of the second clamping and releasing solenoid valve b3-8 of the spray preventer box, and the other way enters the P port of the second clamping and releasing solenoid valve a 3-10 of the spray preventer box. At this time, operate the electromagnet a of the second clamping and releasing solenoid valve a 3-10 of the spray preventer box to energize it, and the second clamping and releasing solenoid valve a 3-10 of the spray preventer box is reversed. The second clamping and releasing solenoid valve a 3-10 of the spray preventer box works in the left position, and the second clamping and releasing solenoid valve a 3-10 of the spray preventer box is in the left position. The P port and the A port of 3-10 are always connected, and the liquid flows through the P port of the second clamping and releasing solenoid valve a3-10 of the spray preventer box, flows through the A port and enters the rod chamber of the second spray preventer box 1-5, and the return oil of the rodless chamber of the second spray preventer box 1-5 enters the A port of the second clamping and releasing solenoid valve b3-8 of the spray preventer box to stand by. At this time, the second clamping and releasing solenoid valve b3-8 of the spray preventer box works in the right position, and the A port and the T port of the second clamping and releasing solenoid valve b3-8 of the spray preventer box are always connected, and the liquid flows through the A port of the second clamping and releasing solenoid valve b3-8 of the spray preventer box, flows through the T port and enters the T port of the double spray preventer box electro-hydraulic integrated valve group 1-3, and flows back to the hydraulic oil tank. This cycle realizes the rapid release circuit cycle of the second spray preventer box 1-5;

[0076] ⑥ Spray box second middle floating circuit

[0077] When the electromagnet b of the second blowout preventer box clamping and releasing solenoid valve b3-8 is energized and the electromagnet a of the second blowout preventer box clamping and releasing solenoid valve a 3-10 is de-energized, the oil cylinder of the second blowout preventer box is in the floating middle position;

[0078] When the electromagnet a of the second blowout box clamping and releasing solenoid valve a3-10 loses power, the second blowout box clamping and releasing solenoid valve a3-10 is in the initial position, the A port and the T port of the second blowout box clamping and releasing solenoid valve a3-10 are connected, and the rod chamber fluid of the second blowout box 1-5 flows through the A port and the T port of the second blowout box clamping and releasing solenoid valve a3-10, and flows back to the hydraulic oil tank through the T port of the double blowout box electro-hydraulic integrated valve group 1-3;

[0079] At this time, the electromagnet b of the second blowout box clamping and releasing solenoid valve b3-8 is energized, the second blowout box clamping and releasing solenoid valve b3-8 is reversed, and the A port and the T port of the second blowout box clamping and releasing solenoid valve b3-8 are connected. At this time, the liquid flow of the rodless chamber of the second blowout box 1-5 passes through the A port and the T port of the second blowout box clamping and releasing solenoid valve b3-8, and flows back to the hydraulic oil tank through the T port of the double blowout box electro-hydraulic integrated valve group 1-3;

[0080] In this way, the rod chamber and the rodless chamber of the blowout prevention box 1-5 are both connected to the hydraulic oil tank, and the clamping cylinder of the blowout prevention box 1-5 is in a floating middle position state.

[0081] When the equipment is in deep well operation, as the well pressure continues to increase, the system pressure set by the pressure compensation variable pump 1-1 alone is not enough to ensure the clamping and sealing of the first and second rubber cores of the blowout preventer box. At this time, the pneumatic liquid booster pump 1-6 needs to be operated separately. The maximum output pressure of the pneumatic liquid booster pump 1-6 can reach 35Mpa. By adjusting the air source pressure of the system, the hydraulic output pressure of the pneumatic liquid booster pump 1-6 can be controlled to meet the increasing well pressure for the high clamping pressure of the first and second rubber cores of the blowout preventer box. The hydraulic oil output by the pneumatic liquid booster pump 1-6 enters through the P3 port of the double blowout preventer box electro-hydraulic integrated valve group 1-3. When the hydraulic oil flows through the P3 port, it enters the blowout preventer box selection solenoid valve a3-11 and the blowout preventer box selection solenoid valve b3-12 in two ways. The blowout preventer box selection solenoid valve b3-12 is in the normally closed position, and the blowout preventer box selection solenoid valve a3-11 is in the normally open position.

[0082] When the electromagnet b of the blowout box selection solenoid valve b3-12 loses power, the ports 1 and 2 of the blowout box selection solenoid valve b3-12 are normally closed, the oil circuit is blocked, the electromagnet a of the blowout box selection solenoid valve a3-11 loses power, the ports 1 and 2 of the blowout box selection solenoid valve a3-11 are normally open, the liquid flows through the blowout box selection solenoid valve a3-11, enters from the port 1 of the blowout box selection solenoid valve a3-11, flows out from the port 2 of the blowout box selection solenoid valve a3-11, and respectively enters the P port of the blowout box first clamping and releasing solenoid valve a3-5 and the P port of the blowout box first clamping and releasing solenoid valve b3-3 to stand by, and the clamping and releasing control of the corresponding blowout box 1-4 is realized by controlling the on-off of the electromagnet a of the blowout box first clamping and releasing solenoid valve a3-5 and the electromagnet b of the blowout box first clamping and releasing solenoid valve b3-3;

[0083] When the electromagnet b of the blowout box selection solenoid valve b3-12 is energized, the 1st and 2nd ports of the blowout box selection solenoid valve b3-12 are normally connected, the electromagnet a of the blowout box selection solenoid valve a3-11 is energized, the 1st and 2nd ports of the blowout box selection solenoid valve a3-11 are normally closed, the oil circuit is blocked, the liquid flows through the blowout box selection solenoid valve b3-12, enters from the 1st port of the blowout box selection solenoid valve b3-12, flows out from the 2nd port of the blowout box selection solenoid valve b3-12, and enters the P port of the blowout box second clamping and releasing solenoid valve b3-8 and the P port of the blowout box second clamping and releasing solenoid valve a 3-10 respectively to stand by, and the clamping and releasing control of the blowout box second 1-5 is realized by controlling the on and off of the electromagnet b of the blowout box second clamping and releasing solenoid valve b3-8 and the electromagnet a of the blowout box second clamping and releasing solenoid valve a 3-10.

[0084] In this embodiment: the valve group body (oil circuit block) is produced by Sun Corporation of the United States, HX-001 series valve group. The blowout box 1 quick clamping solenoid valve a and the blowout box selection solenoid valve a are both two-position two-way solenoid valves a, produced by Sun Corporation of the United States, DTAF-a series valve group. The blowout box 2 quick clamping solenoid valve b and the blowout box selection solenoid valve b are two-position two-way solenoid valves b, produced by Sun Corporation of the United States, DTAF-b series valve group. The one-way valve 1 and the one-way valve 2 are both produced by Sun Corporation of the United States, CXDA series valve group. The blowout box 1 clamping and releasing solenoid valve a and the blowout box 2 clamping and releasing solenoid valve a are both electromagnetic reversing valve ball valves A, produced by HydraForce of the United States, WFL-A series valve group. The blowout box 1 clamping and releasing solenoid valve b and the blowout box 2 clamping and releasing solenoid valve b are both electromagnetic reversing valve ball valves B, produced by HydraForce of the United States, WFL-B series valve group.

[0085] The traditional way of tightening and loosening the blowout box is to use a hydraulically controlled reversing valve. The present invention uses four electromagnetic reversing valves and ball valves in combination, which are electrically controlled valves. The electromagnetic reversing valve ball valve relies on spherical or conical sealing to cut off the oil circuit, which can achieve no leakage in all working pressure ranges. Due to its good sealing performance, it can achieve no leakage, which is particularly suitable for systems with micro-feeding and pressure maintenance requirements. This feature is suitable for the tightening and loosening control circuit of the blowout box rubber core. When the whole system is powered off, the working state of the blowout box actuator controlled by the valve group remains in the working position.

Claims

1. An electro-hydraulic integrated valve group structure for double blowout preventer box control, characterized in that: The invention comprises a pressure compensation variable pump (1-1), a speed regulating valve group (1-2), a double blowout preventer box electro-hydraulic integrated valve group (1-3), a blowout preventer box 1 (1-4) and a blowout preventer box 2 (1-5), wherein the pressure compensation variable pump (1-1) is connected to the speed regulating valve group (1-2) and is divided into two paths, which are respectively connected to the P1 port and the P2 port of the double blowout preventer box electro-hydraulic integrated valve group (1-3); the invention also comprises a pneumatic liquid booster pump (1-6), which is connected to the P3 port of the double blowout preventer box electro-hydraulic integrated valve group (1-3); The double blowout preventer electro-hydraulic integrated valve group (1-3) comprises a valve group body (3-0) and a blowout preventer first quick clamping solenoid valve a (3-1), a one-way valve (3-2), a blowout preventer first clamping and releasing solenoid valve b (3-3), a blowout preventer first clamping and releasing solenoid valve a (3-5), a blowout preventer second quick clamping solenoid valve b (3-6), a one-way valve (3-7), a blowout preventer second clamping and releasing solenoid valve b (3-8) and a blowout preventer second clamping and releasing solenoid valve a (3-10) which are integrated and inserted into the valve group body (3-0); The P1 port is connected in sequence to the blowout preventer box 1 quick clamping solenoid valve a (3-1), the one-way valve 1 (3-2), the blowout preventer box 1 clamping and releasing solenoid valve b (3-3) and the rodless chamber of the blowout preventer box 1 (1-4), and the rod chamber of the blowout preventer box 1 (1-4) is connected in sequence to the blowout preventer box 1 clamping and releasing solenoid valve a (3-5), the T port of the double blowout preventer box electro-hydraulic integrated valve group (1-3) and the hydraulic oil tank to form the blowout preventer box 1 oil circuit. By controlling the energization and de-energization operations of the blowout preventer box 1 quick clamping solenoid valve a (3-1), the blowout preventer box 1 clamping and releasing solenoid valve b (3-3) and the blowout preventer box 1 clamping and releasing solenoid valve a (3-5), the conduction of the blowout preventer box 1 oil circuit is controlled to realize the clamping and releasing control of the blowout preventer box 1 (1-4); The P2 port is connected in sequence to the blowout box 2 quick clamping solenoid valve b (3-6), the check valve 2 (3-7), the blowout box 2 clamping and releasing solenoid valve b (3-8) and the rodless chamber of the blowout box 2 (1-5), and the rod chamber of the blowout box 2 (1-5) is connected in sequence to the blowout box 2 clamping and releasing solenoid valve a (3-10), the T port of the double blowout box electro-hydraulic integrated valve group (1-3) and the hydraulic oil tank, forming the blowout box 2 oil circuit. By controlling the energization and de-energization of the blowout box 2 quick clamping solenoid valve b (3-6), the blowout box 2 clamping and releasing solenoid valve b (3-8) and the blowout box 2 clamping and releasing solenoid valve a (3-10) in the double blowout box electro-hydraulic integrated valve group (1-3), the conduction of the blowout box 2 oil circuit is controlled, and the clamping and releasing control of the blowout box 2 (1-5) is realized; The system is in a constant pressure mode of 21 MPa, and the pressure compensation variable pump (1-1) is in operation; the system is in a deep well operation condition, and the pneumatic liquid booster pump (1-6) is in operation, and the maximum output pressure of the pneumatic liquid booster pump (1-6) is 35 MPa.

2. The electro-hydraulic integrated valve group structure for controlling a double blowout preventer box according to claim 1, characterized in that: The double blowout preventer electro-hydraulic integrated valve group (1-3) further comprises a blowout preventer selection solenoid valve a (3-11) and a blowout preventer selection solenoid valve b (3-12) which are integrated and inserted into the valve group body (3-0). The blowout preventer selection solenoid valve a (3-11) and the blowout preventer selection solenoid valve b (3-12) are connected in parallel at the rear end of the P3 port. The blowout preventer selection solenoid valve a (3-11) is connected to the rod chamber of the blowout preventer first (1-4) through the blowout preventer first clamping and releasing solenoid valve a (3-5). The blowout preventer selection solenoid valve a (3-11) is connected to the rodless chamber of the blowout preventer first (1-4) through the blowout preventer first clamping and releasing solenoid valve b (3-3). The blowout preventer selection solenoid valve b (3-12) is connected to the rodless chamber of the blowout preventer first (1-4) through the blowout preventer second clamping and releasing solenoid valve b (3-8) is connected to the rodless chamber of the second blowout box (1-5), and the blowout box selection solenoid valve b (3-12) is connected to the rod chamber of the second blowout box (1-5) through the second blowout box clamping and releasing solenoid valve a (3-10); The hydraulic oil of the pneumatic liquid booster pump (1-6) enters the P3 port of the double blowout preventer electro-hydraulic integrated valve group (1-3). When the solenoid b of the blowout preventer selection solenoid valve b (3-12) loses power, the 1st and 2nd ports of the blowout preventer selection solenoid valve b (3-12) are normally closed, and the oil circuit is blocked. The solenoid a of the blowout preventer selection solenoid valve a (3-11) loses power, and the 1st and 2nd ports of the blowout preventer selection solenoid valve a (3-11) are normally open. The hydraulic oil flows through the blowout preventer selection solenoid valve b (3-12) and enters from the 1st port of the blowout preventer selection solenoid valve a (3-11). After flowing out from the 2nd port of the blowout preventer selection solenoid valve a, it is divided into two paths and enters the P port of the blowout preventer first clamping and releasing solenoid valve a (3-5) and the P port of the blowout preventer first clamping and releasing solenoid valve b (3-3) respectively. The on-off control of the electromagnet a of the blowout box selection solenoid valve b (3-5) and the electromagnet b of the blowout box one clamping and releasing solenoid valve b (3-3) realizes the clamping and releasing control of the corresponding blowout box one (1-4); when the electromagnet b of the blowout box selection solenoid valve b (3-12) is energized, the 1st and 2nd ports of the blowout box selection solenoid valve b (3-12) are normally open, the electromagnet a of the blowout box selection solenoid valve a (3-11) is energized, the 1st and 2nd ports of the blowout box selection solenoid valve a (3-11) are normally closed, the oil circuit is blocked, and the hydraulic oil flows through the blowout box selection solenoid valve b (3-12), enters from the 1st port of the blowout box selection solenoid valve b (3-12), flows out from the 2nd port of the blowout box selection solenoid valve b, and is divided into two paths, respectively entering the P port of the blowout box two clamping and releasing solenoid valve b (3-8) and the blowout box two clamping and releasing solenoid valve a The P port of (3-10) is on standby, and the clamping and loosening control of the blowout preventer box 2 (1-5) is realized by controlling the on-off of the electromagnet b of the blowout preventer box 2 clamping and loosening solenoid valve b (3-8) and the electromagnet a of the blowout preventer box 2 clamping and loosening solenoid valve a (3-10).

3. The electro-hydraulic integrated valve group structure for controlling a double blowout preventer box according to claim 2, characterized in that: The blowout box 1 quick clamping solenoid valve a (3-1), the blowout box 2 quick clamping solenoid valve b (3-6), the blowout box selection solenoid valve a (3-11) and the blowout box selection solenoid valve b (3-12) are all two-position two-way solenoid valves.

4. The electro-hydraulic integrated valve group structure for controlling a double blowout preventer box according to claim 2, characterized in that: The blowout preventer box 1 clamping and releasing solenoid valve b (3-3), the blowout preventer box 1 clamping and releasing solenoid valve a (3-5), the blowout preventer box 2 clamping and releasing solenoid valve b (3-8) and the blowout preventer box 2 clamping and releasing solenoid valve a (3-10) are all zero-leakage solenoid reversing ball valves.

5. A method for using the electro-hydraulic integrated valve group structure for controlling a double blowout preventer box according to any one of claims 2 to 4, characterized in that: The hydraulic oil provided by the pressure-compensated variable pump (1-1) enters the speed regulating valve group (1-2), is divided into two paths after the speed regulating valve group (1-2) performs speed regulation, and respectively enters the P1 port and the P2 port of the double-spray preventer electro-hydraulic integrated valve group (1-3) to form the following circuit; ① Blowout prevention box - quick compression circuit: When the electromagnet b of the blowout preventer box 1 clamping and releasing solenoid valve b (3-3) and the electromagnet a of the blowout preventer box 1 clamping and releasing solenoid valve a (3-5) lose power at the same time, the oil cylinder of the blowout preventer box 1 (1-4) is in the fast clamping position; When the hydraulic oil enters the P1 port, the solenoid a of the blowout preventer box quick clamping solenoid valve a (3-1) is controlled to be energized, and the blowout preventer box quick clamping solenoid valve a (3-1) is reversed. At this time, the liquid flows from the P1 port into the 1st port of the blowout preventer box quick clamping solenoid valve a (3-1), and then flows out from the 2nd port of the blowout preventer box quick clamping solenoid valve a (3-1) and enters the one-way valve 1 (3-2). The liquid flow overcomes the one-way valve 1 (3- 2) of the spring preload force, opens the liquid flow path of the check valve 1 (3-2), and enters the P port of the blowout preventer box clamping and releasing solenoid valve b (3-3) to wait. At this time, the electromagnet b of the blowout preventer box clamping and releasing solenoid valve b (3-3) loses power. In the initial state, relying on the spring preload force, the blowout preventer box clamping and releasing solenoid valve b (3-3) works in the left position, and the P port and A port of the blowout preventer box clamping and releasing solenoid valve b (3-3) are always connected. The liquid flows through the P port of the spray box 1 clamping and releasing solenoid valve b (3-3) and flows through the A port to enter the rodless chamber of the spray box 1 (1-4). The return oil of the rod chamber of the spray box 1 (1-4) enters the A port of the spray box 1 clamping and releasing solenoid valve a (3-5) to wait. At this time, the electromagnet a of the spray box 1 clamping and releasing solenoid valve a (3-5) loses power. In the initial state, the spray box 1 clamping and releasing solenoid valve a (3-5) relies on the spring preload force. When working in the right position, the A port and T port of the blowout box 1 clamping and releasing solenoid valve a (3-5) are always connected. At this time, the hydraulic oil in the rod chamber of the blowout box 1 (1-4) flows through the A port of the blowout box 1 clamping and releasing solenoid valve a (3-5), and then enters the T port of the double blowout box electro-hydraulic integrated valve group (1-3) through the T port of the blowout box 1 clamping and releasing solenoid valve a (3-5), and flows back to the hydraulic oil tank. This cycle realizes the rapid compression circuit circulation of the blowout box 1; ② Blowout prevention box - quick release circuit: When the electromagnet b of the blowout preventer box 1 clamping and releasing solenoid valve b (3-3) and the electromagnet a of the blowout preventer box 1 clamping and releasing solenoid valve a (3-5) are energized at the same time, the oil cylinder of the blowout preventer box 1 (1-4) is in the quick release position; When the hydraulic oil enters the P1 port, the solenoid a of the blowout preventer box quick clamping solenoid valve a (3-1) is controlled to be energized, and the blowout preventer box quick clamping solenoid valve a (3-1) is reversed. At this time, the liquid flows from the P1 port into the 1st port of the blowout preventer box quick clamping solenoid valve a (3-1), and then flows out from the 2nd port of the blowout preventer box quick clamping solenoid valve a (3-1) and enters the one-way valve 1 (3-2). The liquid flow overcomes the spring preload of the one-way valve 1 (3-2) and opens the liquid flow of the one-way valve 1 (3-2). The oil in the one-way valve 1 (3-2) is connected to the oil passage of the first clamping and releasing solenoid valve b (3-3). At this time, the solenoid b of the first clamping and releasing solenoid valve b (3-3) of the blowout preventer box is operated to energize it, and the first clamping and releasing solenoid valve b (3-3) of the blowout preventer box is switched. At this time, the outlet of the one-way valve 1 (3-2) is divided into two ways. Because the P port of the first clamping and releasing solenoid valve b (3-3) of the blowout preventer box is closed, one of the ways is blocked from the oil passage of the P port of the first clamping and releasing solenoid valve b (3-3) of the blowout preventer box, and the other way enters the first clamping and releasing solenoid valve b (3-3) of the blowout preventer box. At this time, the solenoid a of the blowout box clamping and releasing solenoid valve a (3-5) is operated to energize it, and the blowout box clamping and releasing solenoid valve a (3-5) is reversed. The blowout box clamping and releasing solenoid valve a (3-5) works in the left position. The P port of the blowout box clamping and releasing solenoid valve a (3-5) is always connected with the A port. The liquid flows through the P port of the blowout box clamping and releasing solenoid valve a (3-5) and the A port into the rod chamber of the blowout box one (1-4). The blowout box one (1-4 ) enters the A port of the blowout preventer box 1 clamping and releasing solenoid valve b (3-3) to wait, at this time, the blowout preventer box 1 clamping and releasing solenoid valve b (3-3) works in the right position, the A port and the T port of the blowout preventer box 1 clamping and releasing solenoid valve b (3-3) are always connected, the liquid flows through the A port of the blowout preventer box 1 clamping and releasing solenoid valve b (3-3) and flows through the T port into the T port of the double blowout preventer box electro-hydraulic integrated valve group (1-3), and flows back to the hydraulic oil tank. This cycle realizes the rapid release circuit cycle of the blowout preventer box 1 (1-4); ③ Blowout prevention box-mid-position floating circuit When the electromagnet b of the blowout preventer box 1 clamping and releasing solenoid valve b (3-3) is energized and the electromagnet a of the blowout preventer box 1 clamping and releasing solenoid valve a (3-5) is de-energized, the oil cylinder of the blowout preventer box 1 is in the floating middle position; When the electromagnet a of the blowout preventer box clamping and releasing solenoid valve a (3-5) loses power, the blowout preventer box clamping and releasing solenoid valve a (3-5) is in the initial position, the A port and the T port of the blowout preventer box clamping and releasing solenoid valve a (3-5) are connected, and the rod chamber fluid of the blowout preventer box (1-4) flows through the A port and the T port of the blowout preventer box clamping and releasing solenoid valve a (3-5), and returns to the hydraulic oil tank through the T port of the double blowout preventer box electro-hydraulic integrated valve group (1-3); At this time, the electromagnet b of the blowout preventer box clamping and releasing solenoid valve b (3-3) is energized, the blowout preventer box clamping and releasing solenoid valve b (3-3) is switched, and the A port and the T port of the blowout preventer box clamping and releasing solenoid valve b (3-3) are connected. At this time, the liquid flow in the rodless chamber of the blowout preventer box (1-4) passes through the A port and the T port of the blowout preventer box clamping and releasing solenoid valve b (3-3), and returns to the hydraulic oil tank through the T port of the double blowout preventer box electro-hydraulic integrated valve group (1-3); In this way, the rod chamber and the rodless chamber of the blowout preventer box 1 (1-4) are both connected to the hydraulic oil tank, and the clamping cylinder of the blowout preventer box 1 (1-4) is in a floating middle position state; ④ Anti-blowout box second quick compression circuit: When the electromagnet b of the second blowout box clamping and releasing solenoid valve b (3-8) and the electromagnet a of the second blowout box clamping and releasing solenoid valve a (3-10) lose power at the same time, the oil cylinder of the second blowout box (1-5) is in the fast clamping position; When the hydraulic oil enters the P2 port, the solenoid b of the second blowout preventer box quick clamping solenoid valve b (3-6) is controlled to be energized, and the second blowout preventer box quick clamping solenoid valve b (3-6) is reversed. At this time, the liquid flows from the P2 port into the 1st port of the second blowout preventer box quick clamping solenoid valve b (3-6), and then flows out from the 2nd port of the second blowout preventer box quick clamping solenoid valve b (3-6) and enters the second check valve (3-7). The liquid flow overcomes the spring preload force of the second check valve (3-7), opens the liquid flow path of the second check valve (3-7), and enters the second blowout preventer box clamping and releasing solenoid valve. The P port of the solenoid valve b (3-8) is on standby. At this time, the electromagnet b of the spray box second clamping and releasing solenoid valve b (3-8) loses power. In the initial state, relying on the spring preload force, the spray box second clamping and releasing solenoid valve b (3-8) works in the left position. The P port and the A port of the spray box second clamping and releasing solenoid valve b (3-8) are always connected. The liquid flows through the P port of the spray box second clamping and releasing solenoid valve b (3-8) and flows through the A port into the rodless chamber of the spray box second (1-5). The return oil of the rod chamber of the spray box second (1-5) enters the spray box second clamping and releasing solenoid valve a The A port of the blowout box 2 clamping and releasing solenoid valve a (3-10) is on standby. At this time, the electromagnet a of the blowout box 2 clamping and releasing solenoid valve a (3-10) loses power. In the initial state, relying on the spring preload, the blowout box 2 clamping and releasing solenoid valve a (3-10) works in the right position. The A port and T port of the blowout box 2 clamping and releasing solenoid valve a (3-10) are always connected. At this time, the hydraulic oil in the rod chamber of the blowout box 2 (1-5) flows through the A port of the blowout box 2 clamping and releasing solenoid valve a (3-10), and then enters the T port of the double blowout box electro-hydraulic integrated valve group (1-3) through the T port of the blowout box 2 clamping and releasing solenoid valve a (3-10), and flows back to the hydraulic oil tank. This cycle realizes the rapid compression circuit cycle of the blowout box 1; ⑤ Anti-spray box second quick release circuit: When the electromagnet b of the second blowout box clamping and releasing solenoid valve b (3-8) and the electromagnet a of the second blowout box clamping and releasing solenoid valve a (3-10) are energized at the same time, the oil cylinder of the second blowout box (1-5) is in the quick release position; When the hydraulic oil enters the P2 port, the solenoid b of the second blowout box quick clamping solenoid valve b (3-6) is controlled to be energized, and the second blowout box quick clamping solenoid valve b (3-6) is controlled to change direction. At this time, the liquid flows from the P2 port into the 1st port of the second blowout box quick clamping solenoid valve b (3-6), and then flows out from the 2nd port of the second blowout box quick clamping solenoid valve b (3-6) and enters the second check valve (3-7). The liquid flow overcomes the spring preload of the second check valve (3-7) and opens the liquid flow of the second check valve (3-7). The oil enters the P port of the second clamping and releasing solenoid valve b (3-8) of the blowout box. At this time, the solenoid b of the second clamping and releasing solenoid valve b (3-8) of the blowout box is operated to energize it, and the second clamping and releasing solenoid valve b (3-8) of the blowout box is switched. At this time, the outlet of the check valve 2 (3-7) is divided into two paths. Because the P port of the second clamping and releasing solenoid valve b (3-8) of the blowout box is closed, one of the paths is blocked from the P port oil path of the second clamping and releasing solenoid valve b (3-8) of the blowout box, and the other path enters the second clamping and releasing solenoid valve a of the blowout box. At this time, the electromagnet a of the second clamping and releasing solenoid valve a (3-10) of the blowout preventer box is operated to energize it, and the second clamping and releasing solenoid valve a (3-10) of the blowout preventer box is reversed, and the second clamping and releasing solenoid valve a (3-10) of the blowout preventer box works in the left position. The P port of the second clamping and releasing solenoid valve a (3-10) of the blowout preventer box is always connected with the A port, and the liquid flows through the second clamping and releasing solenoid valve a of the blowout preventer box. The P port of (3-10) flows through the A port into the rod chamber of the second blowout preventer box (1-5), and the return oil of the rodless chamber of the second blowout preventer box (1-5) enters the A port of the second blowout preventer box clamping and releasing solenoid valve b (3-8) to wait. At this time, the second blowout preventer box clamping and releasing solenoid valve b (3-8) works in the right position, and the A port and T port of the second blowout preventer box clamping and releasing solenoid valve b (3-8) are always connected. The liquid flows through the A port of the second blowout preventer box clamping and releasing solenoid valve b (3-8) and flows through the T port into the T port of the double blowout preventer box electro-hydraulic integrated valve group (1-3), and flows back to the hydraulic oil tank. This cycle realizes the rapid release circuit cycle of the second blowout preventer box (1-5); ⑥ Second middle floating circuit of the blowout prevention box When the electromagnet b of the second blowout preventer box clamping and releasing solenoid valve b (3-8) is energized and the electromagnet a of the second blowout preventer box clamping and releasing solenoid valve a (3-10) is de-energized, the oil cylinder of the second blowout preventer box is in the floating middle position; When the electromagnet a of the second blowout preventer box clamping and releasing solenoid valve a (3-10) loses power, the second blowout preventer box clamping and releasing solenoid valve a (3-10) is in the initial position, the A port and the T port of the second blowout preventer box clamping and releasing solenoid valve a (3-10) are connected, and the rod chamber fluid of the second blowout preventer box (1-5) flows through the A port and the T port of the second blowout preventer box clamping and releasing solenoid valve a (3-10), and returns to the hydraulic oil tank through the T port of the double blowout preventer box electro-hydraulic integrated valve group (1-3); At this time, the electromagnet b of the second blowout preventer box clamping and releasing solenoid valve b (3-8) is energized, the second blowout preventer box clamping and releasing solenoid valve b (3-8) is switched, and the A port and the T port of the second blowout preventer box clamping and releasing solenoid valve b (3-8) are connected. At this time, the liquid flow in the rodless chamber of the second blowout preventer box (1-5) passes through the A port and the T port of the second blowout preventer box clamping and releasing solenoid valve b (3-8), and flows back to the hydraulic oil tank through the T port of the double blowout preventer box electro-hydraulic integrated valve group (1-3); In this way, the rod chamber and the rodless chamber of the second blowout preventer box (1-5) are both connected to the hydraulic oil tank, and the clamping cylinder of the second blowout preventer box (1-5) is in a floating middle position state.

6. The method for using the electro-hydraulic integrated valve group structure for controlling a double blowout preventer box according to claim 5, characterized in that: When the equipment is in deep well operation, as the well pressure continues to rise, the system pressure set by the pressure compensation variable pump (1-1) alone is not enough to ensure the clamping and sealing of the first and second rubber cores of the blowout preventer box. At this time, the pneumatic liquid booster pump (1-6) needs to be operated separately. The hydraulic oil output by the pneumatic liquid booster pump (1-6) enters through the P3 port of the double blowout preventer box electro-hydraulic integrated valve group (1-3). When the hydraulic oil flows through the P3 port, it enters the blowout preventer box selection solenoid valve a (3-11) and the blowout preventer box selection solenoid valve b (3-12) in two ways. The blowout preventer box selection solenoid valve b (3-12) is in the normally closed position, and the blowout preventer box selection solenoid valve a (3-11) is in the normally open position. When the electromagnet b of the blowout preventer selection solenoid valve b (3-12) loses power, ports 1 and 2 of the blowout preventer selection solenoid valve b (3-12) are normally closed, the oil circuit is blocked, and the electromagnet a of the blowout preventer selection solenoid valve a (3-11) loses power, ports 1 and 2 of the blowout preventer selection solenoid valve a (3-11) are normally open, the fluid flows through the blowout preventer selection solenoid valve a (3-11) and enters from port 1 of the blowout preventer selection solenoid valve a (3-11), and the blowout preventer selection solenoid valve a (3-11) is blocked. The two outlets of the spray box selection solenoid valve a (3-11) flow out and enter the P port of the spray box clamping and releasing solenoid valve a (3-5) and the P port of the spray box clamping and releasing solenoid valve b (3-3) respectively to wait for orders. By controlling the on-off of the electromagnet a of the spray box clamping and releasing solenoid valve a (3-5) and the electromagnet b of the spray box clamping and releasing solenoid valve b (3-3), the clamping and releasing control of the corresponding spray box 1 (1-4) is realized; When the solenoid b of the blowout box selection solenoid valve b (3-12) is energized, ports 1 and 2 of the blowout box selection solenoid valve b (3-12) are normally open, and the solenoid a of the blowout box selection solenoid valve a (3-11) is energized, ports 1 and 2 of the blowout box selection solenoid valve a (3-11) are normally closed, the oil circuit is blocked, and the fluid flows through the blowout box selection solenoid valve b (3-12), enters from port 1 of the blowout box selection solenoid valve b (3-12), and flows out from port 2 of the blowout box selection solenoid valve b (3-12), and enters port P of the blowout box second clamping and releasing solenoid valve b (3-8) and port P of the blowout box second clamping and releasing solenoid valve a (3-10) respectively, and waits for the solenoid b of the blowout box second clamping and releasing solenoid valve b (3-8) and the solenoid a of the blowout box second clamping and releasing solenoid valve a The on-off control of the electromagnet a of (3-10) realizes the clamping and loosening control of the blowout prevention box 2 (1-5).

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