High-temperature environment-friendly under-pressure operation combination system

Abstract

The utility model discloses a high-temperature environment-friendly under-pressure operation combined system which comprises a high-temperature under-pressure operation system, the high-temperature under-pressure operation system comprises a fixing frame, and a safety three-ram blowout preventer is arranged at the bottom end of the fixing frame. A lower semi-closed blowout preventer, a lower annular blowout preventer, a middle semi-closed blowout preventer, an upper semi-closed blowout preventer and an upper annular blowout preventer are fixedly arranged above the safety three-ram blowout preventer, and a fixing slip is arranged between the middle semi-closed blowout preventer and the upper semi-closed blowout preventer. The utility model has the advantages of high-temperature operation under pressure, high-temperature resistance, high-pressure bearing and high-temperature sealing safety; a full-hydraulic control function is achieved, control is flexible and convenient, and performance is stable and reliable; the sewage treatment and separation function is achieved, oil-water separation reaches the standard, safety and environmental protection are achieved, and energy conservation and efficiency improvement are The circulating cooling function is achieved, heat and cold are independently replaced, and the circulating cooling effect is good; the pressure distribution control function is achieved, pressure is balanced and stable, and working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of high-temperature environmentally friendly pressure-carrying combined systems, in particular to a high-temperature environmentally friendly pressure-carrying combined system. Background Art

[0002] The high-temperature, environmentally friendly, pressurized operation combined system is a system combination device for high-temperature operations, remote and ground control, energy saving, environmental protection, safe and efficient tubing tripping operations for well washing and repairing operations at ground pressurized wellheads. It is mainly suitable for tubing tripping operations at pressurized wellheads of high-temperature wells under special and complex circumstances. It is something that conventional well oil and water pressurized operations do not have and has certain particularities. It consists of main parts such as high-temperature pressurized operation system, full hydraulic control system, sewage treatment separation system, circulating cooling system, etc.

[0003] The existing system is not able to withstand high temperature and high pressure, has poor sealing performance at high temperature, lacks safety, is not reliable during operation, is inconvenient to control, lacks the ability to treat sewage, and has insufficient cooling effect. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a high-temperature environmentally friendly pressure operation combined system.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A high-temperature environmentally friendly pressure operation combined system, comprising: a high-temperature pressure operation system, the high-temperature pressure operation system comprising a fixed frame, a safety three-gate blowout preventer is arranged at the bottom end of the fixed frame, a lower semi-sealed blowout preventer, a lower annular blowout preventer, a middle semi-sealed blowout preventer, an upper semi-sealed blowout preventer and an upper annular blowout preventer are fixedly arranged above the safety three-gate blowout preventer, and a fixed slip is arranged between the middle semi-sealed blowout preventer and the upper semi-sealed blowout preventer; a sewage treatment separation system, the sewage treatment separation system comprising a particle sedimentation tank, a sand sedimentation tank, a suspended matter filter tank and a three-stage filter tank are arranged on one side of the particle sedimentation tank, the three-stage filter tank is fixedly connected to a sewage screw pump through a sewage pipe, and the output end of the sewage screw pump is fixedly connected to an oil-water separator and an oil collector A clean water tank is provided, the oil-water separator is fixedly connected to the clean water tank through a clean water pipe, a circulating cooling system is arranged on one side of the sewage treatment separation system, the circulating cooling system comprises a hot water exchanger, a compression chiller is arranged on one side of the hot water exchanger, a clean water screw pump is arranged between the hot water exchanger and the compression chiller, the clean water tank is connected to the clean water screw pump, the hot water exchanger and the clean water screw pump are connected to each other through a clean water circulation pipe, a hot water input pipe and a cold water output pipe are fixedly connected to the hot water exchanger, the ends of the hot water input pipe and the cold water output pipe are connected to the compression chiller, a check valve is arranged on one end of the clean water circulation pipe passing through the clean water screw pump, and an overflow valve is arranged at the connection between the clean water screw pump and the clean water tank.

[0007] In order to better achieve the above purpose, the utility model adopts a further technical solution: a movable slip is arranged above the upper annular blowout preventer, a connecting beam is arranged between the movable slip and the upper annular blowout preventer, a lifting cylinder is fixedly arranged on the fixed frame, and the lifting cylinder is arranged on both sides of the upper annular blowout preventer.

[0008] In order to better achieve the above-mentioned purpose, the utility model adopts a further technical solution: a high-altitude control operating platform is fixedly arranged on the top of the fixed frame, and the high-altitude control operating platform corresponds to the lifting cylinder.

[0009] In order to better achieve the above-mentioned purpose, the utility model adopts a further technical solution: a pressure balancing valve is arranged between the lower semi-sealed blowout preventer and the lower annular blowout preventer.

[0010] The advantages of the utility model are: it has the function of high-temperature and pressure operation, is resistant to high temperature, can bear high pressure, and has strong high-temperature sealing safety; it has a full hydraulic control function, the control is flexible and convenient, and the performance is stable and reliable; it has a sewage treatment and separation function, the oil-water separation meets the standards, it is safe, environmentally friendly, and energy-saving and efficiency-enhancing; it has a circulating cooling function, independent replacement of hot and cold, and good circulating cooling effect; it has a pressurized diversion control function, the pressure balance is stable, and the work efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A high-temperature pressurized operation system diagram of a high-temperature environmentally friendly pressurized operation combined system proposed by the utility model;

[0012] Figure 2 This is a sewage treatment separation and circulating cooling system diagram of a high-temperature environmentally friendly pressure operation combined system proposed by the utility model;

[0013] Figure 3 This is a diagram of a hot water exchanger for a high-temperature, environmentally friendly, pressurized operation combined system proposed by the utility model.

[0014] In the figure: 1 high temperature and pressure operation system, 1.1 safety three-gate blowout preventer, 1.2 lower half-closed blowout preventer, 1.3 lower annular blowout preventer, 1.4 middle half-closed blowout preventer, 1.5 fixed slips, 1.6 upper half-closed blowout preventer, 1.7 upper annular blowout preventer, 1.8 mobile slips, 1.9 lifting cylinder, 1.10 connecting beam, 1.11 high altitude control console, 1.12 pressure balance valve, 2 sewage treatment separation system, 2.1 particles 1. Particle settling tank, 2.2 sand settling tank, 2.3 suspended solids filter tank, 2.4 tertiary filter tank, 2.5 sewage screw pump, 2.6 oil-water separator, 2.7 oil collecting tank, 2.8 clean water tank, 3 circulating cooling system, 3.1 hot water exchanger, 3.2 compression chiller, 3.3 hot water input pipeline, 3.4 cold water output pipeline, 3.5 clean water screw pump, 3.6 clean water circulation pipeline, 3.7 check valve, 3.8 overflow valve. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0016] Reference Figure 1-Figure 3As shown, a high-temperature environmental protection pressure operation combined system comprises: a high-temperature pressure operation system 1, the high-temperature pressure operation system 1 comprises a fixed frame, the bottom end of the fixed frame is provided with a safety three-gate blowout preventer 1.1, the upper part of the safety three-gate blowout preventer 1.1 is fixedly provided with a lower half-sealed blowout preventer 1.2, a lower annular blowout preventer 1.3, a middle half-sealed blowout preventer 1.4, an upper half-sealed blowout preventer 1.6 and an upper annular blowout preventer 1.7, and a fixed slip 1.5 is provided between the middle half-sealed blowout preventer 1.4 and the upper half-sealed blowout preventer 1.6; a sewage treatment separation system 2, the sewage treatment separation system 2 comprises a particle settling tank 2.1, a particle A sand sedimentation tank 2.2, a suspended matter filter tank 2.3 and a tertiary filter tank 2.4 are arranged on one side of the sedimentation tank 2.1. The tertiary filter tank 2.4 is fixedly connected to a sewage screw pump 2.5 through a sewage pipe. An output end of the sewage screw pump 2.5 is fixedly connected to an oil-water separator 2.6 and an oil collecting tank 2.7. The oil-water separator 2.6 is fixedly connected to a clean water tank 2.8 through a clean water pipe. A circulating cooling system 3 is arranged on one side of the sewage treatment separation system 2. The circulating cooling system 3 includes a hot water exchanger 3.1. A compression chiller 3.2 is arranged on one side of the hot water exchanger 3.1. The hot water exchanger 3.1 and the compression chiller A clean water screw pump 3.5 is arranged between the clean water tank 2.8 and the clean water screw pump 3.5, the hot water exchanger 3.1 and the clean water screw pump 3.5 are connected to each other through a clean water circulation pipeline 3.6, a hot water input pipeline 3.3 and a cold water output pipeline 3.4 are fixedly connected to the hot water exchanger 3.1, and the ends of the hot water input pipeline 3.3 and the cold water output pipeline 3.4 are connected to the compression chiller 3.2; a check valve 3.7 is arranged at one end of the clean water circulation pipeline 3.6 passing through the clean water screw pump 3.5, and an overflow valve 3.8 is arranged at the connection between the clean water screw pump 3.5 and the clean water tank 2.8; the upper ring A movable slip 1.8 is arranged above the annular blowout preventer 1.7, a connecting crossbeam 1.10 is arranged between the movable slip 1.8 and the upper annular blowout preventer 1.7, a lifting cylinder 1.9 is fixedly arranged on the fixed frame, and the lifting cylinder 1.9 is arranged on both sides of the upper annular blowout preventer 1.7; a high-altitude control operation table 1.11 is fixedly arranged on the top of the fixed frame, the high-altitude control operation table 1.11 corresponds to the lifting cylinder 1.9, and a control switch of the lifting cylinder 1.9 is arranged on the high-altitude control operation table 1.11; a pressure balance valve 1.12 is arranged between the lower semi-sealed blowout preventer 1.2 and the lower annular blowout preventer 1.3.

[0017] In the utility model, when the oil pipe is hoisted from the well, the safety three-gate blowout preventer 1.1 in the high-temperature pressure operation system 1 is in an inoperative state (the internal gates and slips are all open). The safety three-gate blowout preventer 1.1 is activated only in an emergency. The working blowout preventer is the blowout preventer above the safety three-gate blowout preventer 1.1. During high-temperature pressure operation, the entire operating system is a full hydraulic operating system. The flexibility of the hydraulic gate valves and the safety of the hydraulic pipeline should be checked first, and then the lower half-sealed blowout preventer 1.2 and the upper half-sealed blowout preventer 1.6 are closed on the high-altitude control console 1.11, so that the two half-sealed gates of the blowout preventer tightly hold the oil pipe to form an annular space, and the other blowout preventers should all be in an open state; at this time, the high-altitude operation The switch of the mobile slip 1.8 on the control console 1.11 is controlled to make the mobile slip 1.8 clamp the oil pipe, and at the same time, the fixed slip 1.5 releases the oil pipe. At this time, the high-altitude control console 1.11 is started, and the cylinder rising switch lifts the oil cylinder 1.9 to drive the connecting beam 1.10 and the mobile slip 1.8 to clamp the oil pipe and lift it up; when the lifting cylinder 1.9 reaches the highest point, the switch of the fixed slip 1.5 on the high-altitude control console 1.11 is operated to make the fixed slip 1.5 clamp the oil pipe, and at the same time, the mobile slip 1.8 releases the oil pipe. At this time, the cylinder descending switch on the high-altitude control console 1.11 is started, and the lifting cylinder 1.9 begins to descend to the lowest point, and then the oil pipe is lifted up repeatedly, and the oil pipe is lifted up reciprocatingly at the wellhead with high temperature and pressure; If the tubing needs to pass through a joint hoist, the tubing should be stopped first, and the middle semi-sealed BOP 1.4 or the lower annular BOP 1.3 should be closed first to form a sealed space between it and the lower semi-sealed BOP 1.2. At this time, the pressure balance valve 1.12 is opened to balance the pressure in this space with the pressure in the well, and then the lower semi-sealed BOP 1.2 can be opened. Forcible opening will damage the gate. The lower semi-sealed BOP 1.2 can be closed only when the tubing joint hoist passes through the lower semi-sealed BOP 1.2 and enters this space. At this time, the middle semi-sealed BOP 1.4 or the lower annular BOP 1.3 is opened to continue the tubing lifting operation; the purpose of closing the lower semi-sealed BOP 1.2 is to prevent the pressure in the well from causing a blowout during operation. Double sealing is adopted during operation, that is, the lower annular BOP 1.3 and the middle semi-sealed BOP 1. 4 and the upper half-sealed BOP 1.6 and the upper annular BOP 1.7 can be closed and sealed at the same time or used alternately with a single seal; due to the special nature of the wellhead, which is a high-temperature wellhead, the high temperature of the hoisted oil pipe poses certain risks to the operation. For the sake of safety and environmental protection, the cold water outlet of the circulating cooling system 3 is connected to the lower cold water inlet of the upper half-sealed BOP 1.6 in the high-temperature pressure operation system 1, and cold water is injected into the annular space between the lower half-sealed BOP 1.2 and the upper half-sealed BOP 1.6 to cool the oil pipe. With the reciprocating hoisting operation of the oil pipe, the sewage and cooling water in the well flow out from the upper hot water outlet of the middle half-sealed BOP 1.4 and connect to the hot water inlet of the sewage treatment separation system 2. The sewage enters the particle settling tank 2 through the pipeline.1. To precipitate large particles, the sewage flows from the upper part of the pool through the filter holes into the sand sedimentation tank 2.2 for sand precipitation, and the sewage continues to flow from the upper part of the sand sedimentation tank 2.2 through the filter holes into the suspended matter filter tank 2.3. The suspended matter is filtered at the top, and the lower part is oily sewage, which then passes through the lower part of the pool and enters the tertiary filter tank 2.4 to wait for oil and water separation; start the sewage screw pump 2.5, and the oily sewage is pumped into the oil-water separator 2.6 through the sewage pipe pump for oil-water separation. After separation, it is divided into three parts, one part of the clean water enters the clean water tank 2.8 through the clean water pipe; one part of the oil enters the oil collecting tank 2.7 through the oil collecting pipe, and the other part of the separated sewage returns to the sand sedimentation tank 2.2 through the upper sewage pipe, and then is filtered to ensure that the oil and water do not fall to the ground, which is environmentally safe. .

[0018] The clean water after separation enters the circulating cooling system 3 for circulation, and the clean water screw pump 3.5 is started. The clean water enters the lower left interface of the hot water exchanger 3.1 through the pipeline and enters the heat exchange pipe in the shell for cooling. (The cooling cold water source is the compression chiller 3.2, which sends the refrigerated cold water through the cold water output pipeline 3.4, and enters the outer heat exchange pipe in the shell from the upper interface of the hot water exchanger 3.1 to cool the hot water in the heat exchange pipe. The cooled warm water enters the compression chiller 3.2 from the other upper outlet of the hot water exchanger 3.1 through the hot water input pipeline 3.3 for refrigeration and then output).

Claims

1. A high-temperature environmentally friendly pressure operation combined system, characterized in that: include: A high-temperature, pressurized operating system (1), the high-temperature, pressurized operating system (1) comprising a fixed frame, a safety three-gate blowout preventer (1.1) being arranged at the bottom end of the fixed frame, a lower semi-sealed blowout preventer (1.2), a lower annular blowout preventer (1.3), a middle semi-sealed blowout preventer (1.4), an upper semi-sealed blowout preventer (1.6) and an upper annular blowout preventer (1.7) being fixedly arranged above the safety three-gate blowout preventer (1.1), and a fixed slip (1.5) being arranged between the middle semi-sealed blowout preventer (1.4) and the upper semi-sealed blowout preventer (1.6); A sewage treatment separation system (2), the sewage treatment separation system (2) comprising a particle settling tank (2.1), a sand settling tank (2.2), a suspended matter filter tank (2.3) and a tertiary filter tank (2.4) being arranged on one side of the particle settling tank (2.1), the tertiary filter tank (2.4) being fixedly connected to a sewage screw pump (2.5) via a sewage pipe, the output end of the sewage screw pump (2.5) being fixedly connected to an oil-water separator (2.6) and an oil collecting tank (2.7), the oil-water separator (2.6) being fixedly connected to the clean water pipe A clean water tank (2.8) is connected to the sewage treatment separation system (2); a circulating cooling system (3) is arranged on one side of the sewage treatment separation system (2); the circulating cooling system (3) comprises a hot water exchanger (3.1); a compression chiller (3.2) is arranged on one side of the hot water exchanger (3.1); a clean water screw pump (3.5) is arranged between the hot water exchanger (3.1) and the compression chiller (3.2); the clean water tank (2.8) is connected to the clean water screw pump (3.5); the hot water exchanger (3.1) and the clean water screw pump (3.5) are connected to each other; The two water pumps (3.6) are connected to each other via a clean water circulation pipeline (3.6); a hot water input pipeline (3.3) and a cold water output pipeline (3.4) are fixedly connected to the hot water exchanger (3.1); the ends of the hot water input pipeline (3.3) and the cold water output pipeline (3.4) are connected to a compression chiller (3.2); a check valve (3.7) is provided at one end of the clean water circulation pipeline (3.6) passing through the clean water screw pump (3.5); and an overflow valve (3.8) is provided at the connection between the clean water screw pump (3.5) and the clean water tank (2.8).

2. A high temperature environmentally friendly pressure operation combined system according to claim 1, characterized in that: A movable slip (1.8) is arranged above the upper annular blowout preventer (1.7), a connecting crossbeam (1.10) is arranged between the movable slip (1.8) and the upper annular blowout preventer (1.7), and a lifting cylinder (1.9) is fixedly arranged on the fixed frame, and the lifting cylinder (1.9) is arranged on both sides of the upper annular blowout preventer (1.7).

3. A high temperature environmentally friendly pressure operation combined system according to claim 1, characterized in that: A high-altitude control operating platform (1.11) is fixedly arranged on the top of the fixed frame, and the high-altitude control operating platform (1.11) corresponds to the lifting cylinder (1.9).

4. A high temperature environmentally friendly pressure operation combined system according to claim 1, characterized in that: A pressure balancing valve (1.12) is provided between the lower semi-closed blowout preventer (1.2) and the lower annular blowout preventer (1.3).

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