CN115110912B - A construction device and working method for offshore oil well sealing - Google Patents

Abstract

The invention provides a construction device for offshore oil well sealing, which includes oil pipes, oil pipe plugging devices for plugging oil pipes, and spherical self-sealing construction warehouses. The top of the oil pipe plugging devices is fixedly equipped with locking grooves, locking A one-way valve joint is fixedly installed on the top of the check groove, and an automatic connector is movably connected to the one-way valve joint and the locking groove. The upper hydraulic expander and the lower hydraulic expander, the top of the spherical self-enclosed construction warehouse is also equipped with a hose joint, the hose joint is connected to the air pressure pipe, power line and water suction pipe, and the inner wall of the spherical self-enclosed construction warehouse is installed with a control bins and tool bins. Through the technical solution of the present invention, a set of equipment has been developed to block and cut offshore oil wells. The construction process is simple, less costly, less labor-intensive and short in time. During construction, only two frogmen are required to enter the interior to complete the plugging and cutting. Cut tubing work.

Description

A construction device and working method for offshore oil well sealing

technical field

The invention relates to the technical field of sealing equipment for offshore oil wells, in particular to a construction device for sealing offshore oil wells and a working method thereof.

Background technique

With the reduction of oil output from offshore oil wells and the country's requirements for closing wells in shallow sea wetlands, oil wells with low oil output have been closed and shut down and no longer exploited, especially for oil wells deep below sea level. For decommissioned offshore The platform must be shut down before being dismantled. In the field of abandoned oil well sealing operations, there should be no passage of underground fluids inside and outside the well. Therefore, it is necessary to use a sealing device to seal and isolate the environment inside the well from the outside environment to prevent waste caused by accidental spillage of crude oil, and at the same time prevent crude oil from leaking into the Possibility of polluting the marine environment due to seabed surface. In the prior art, a piling ship is used to drive the supporting steel piles down the oil outlet pipe into the seabed and fix them, then the seawater in the supporting steel piles is drained, and workers enter the supporting steel piles to cut the oil pipes And welding and anti-corrosion, after the construction is completed, the supporting steel piles will be lifted out and transported away. These plugging processes are time-consuming, labor-intensive and expensive.

Contents of the invention

In order to make up for the deficiencies of the existing technology, the present invention provides a construction device and working method for offshore oil well sealing. The patent of the present invention has developed a set of equipment that can seal offshore oil wells. The construction process is simple and the cost is low. , with less labor and short time, only two frogmen are needed to enter the interior during construction to complete the sealing work.

The present invention is achieved through the following technical solutions: a construction device for offshore oil well sealing, including oil pipes, oil pipe plugging devices for plugging oil pipes, and spherical self-sealing construction bins, the top of the oil pipe plugging devices is fixed and installed There is a locking groove, and a one-way valve joint is fixedly installed on the top of the locking groove, and an automatic connector is movably connected to the one-way valve joint and the locking groove. An air inlet pipe joint is connected with the first air inlet pipe, and there is a locking piston on the inner wall of the automatic connector. The locking piston is provided with a locking ball, and the lower end of the locking piston is provided with a spring, and the locking piston is connected to one end of the air passage. , the other end of the air passage is provided with a second air intake pipe joint, the second air intake pipe joint is connected with a second air intake pipe, the diameter of the second air intake pipe is smaller than that of the first air intake pipe and installed inside it;

The upper top and lower bottom of the spherical self-enclosed construction warehouse are designed with round holes, and the upper and lower holes are respectively equipped with upper hydraulic expanders and lower hydraulic expanders. The spherical self-enclosed construction warehouse is equipped with an inner support frame for fixing oil pipes. The upper hydraulic expander and the lower hydraulic expander are connected with an air inlet, and the top of the spherical self-enclosed construction warehouse is also equipped with a hose joint, which connects the air pressurized pipe, power line and water suction pipe, and the spherical self-enclosed construction warehouse A control chamber and a tool chamber are installed on the inner wall, and a pumping hose is also provided on the inner wall of the spherical self-enclosed construction chamber, which is connected with the pumping hose; the spherical self-enclosed construction chamber is provided with a spiral for the frogman to enter during operation. Rod barn door.

As a preferred solution, the oil pipe plugging device is made of composite rubber, the interior is an air chamber, and a ring of reinforcement ring is arranged on its outer wall, and the inside of the oil pipe can be sealed after the pressurized air expands.

As a preferred solution, the second air intake pipe and the first air intake pipe are made of steel wire hose material.

As a preferred solution, hoisting rings are fixedly installed on both sides of the upper top of the spherical self-enclosed construction warehouse.

As a preferred solution, the control bin and the tool bin are respectively opened and used by the control bin door switch lever and the tool bin door switch lever.

Further, after the water in the control chamber is drained, it can be opened for use. After opening, there are micro electric welding machines for construction, cutting machines, air compensation nozzles and special tools inside. The tool chamber is fully sealed when it is launched.

As a preferred solution, one side of the screw rod warehouse door is flexibly connected to the outer wall of the spherical self-enclosed construction warehouse through the door hinge, the other side of the screw rod warehouse door is provided with a screw rod, and the upper end of the screw rod is provided with a screw rod rocker. handle, turn the auger rocker to drive the auger to easily open the auger door.

Furthermore, a water inlet valve is provided at the bottom of the control chamber, and a bypass port is provided at the top of the control chamber.

A working method for a construction device for shutting in an offshore oil well, characterized in that it specifically includes the following steps:

S1: The one-way valve joint on the upper part of the oil pipe blocker is connected with two pressure hoses, the second air intake pipe and the first air intake pipe, through an automatic connector. Compressed air is injected into the occluder. When the air pressure reaches the specified value, another second air inlet pipe is connected with the second air inlet pipe joint to inflate and pressurize the air passage. After pressurization, the driving spring will lock the piston and lock The lock ball bounces off, so that the one-way valve joint and the locking groove are separated from the automatic connector, and the oil pipe blocker is left in the oil pipe;

S2: The spherical self-enclosed construction warehouse is inserted from above the oil pipe through the hoisting ring. After the frogman is lowered to the predetermined construction position, the upper hydraulic expander and the lower hydraulic expander can automatically expand to make the diameter of the upper and lower round holes smaller and closely match the oil pipe.

S3: The frogman opens the screw hatch and closes the screw hatch after entering; turns on the pumping switch to pump out the seawater inside the spherical self-enclosed construction chamber, and the bypass port at the top of the spherical self-enclosed construction chamber will deliver air to the interior of the construction chamber when pumping water Equilibrium atmospheric pressure;

S4: After the construction is completed, the construction frogman opens the water inlet valve at the bottom of the spherical self-sealing construction warehouse, so that seawater enters the spherical self-sealing construction warehouse, and the air in the warehouse is discharged through the top bypass port. When the internal and external water pressures are balanced, turn the screw The rod crank drives the screw rod to open the hatch easily.

Compared with the prior art, the present invention has the following beneficial effects due to the adoption of the above technical scheme: a set of equipment has been developed to block and cut offshore oil wells, the construction process is simple, the cost is less, and the construction time is short and the construction time is short. Only two frogmen are needed to enter the interior to complete the work of plugging and cutting the oil pipe.

Additional aspects and advantages of the invention will become apparent in the description which follows, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and understandable from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of oil well plugging device;

Fig. 3 is a side view structural schematic diagram of the control cabin;

Figure 4 is a schematic diagram of the structure of the automatic connector,

Wherein, the corresponding relationship between reference numerals and components in Fig. 1 to Fig. 4 is:

101. First air intake pipe joint; 102. Second air intake pipe joint; 103. One-way valve joint; 104. Locking groove; 105. Oil well plugging device; 106. Reinforcing ring; 107. Air chamber; 2. Automatic connection Device; 201. Second airway tube interface; 202. First airway tube interface; 203. Airway; 204. Locking piston; 205. Spring; 206. Locking lock ball; 3. Spherical self-sealing construction warehouse; 301. Air pressure tube; 302. Power cord; 303. Suction nozzle; 304. Hose connector; 305. Lifting ring; 306. Air inlet; 307. Control compartment door switch lever; 308. Control compartment; .Suction hose; 310. Lower hydraulic expander; 311. Upper hydraulic expander; 312. Inner support frame; 313. Tool compartment door switch lever; 314. Tool compartment; 401. Bypass port; 402. Screw rod compartment Door; 403. door hinge; 404. screw rod rocker; 405. screw rod; 406. water inlet valve;

Detailed ways

In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific implementation disclosed below. Example limitations.

The construction device for offshore oil well closure and its working method according to the embodiment of the present invention will be specifically described below with reference to FIGS. 1 to 4 .

As shown in Figures 1 to 4, the present invention proposes a construction device for offshore oil well sealing, including oil pipes, oil pipe plugging devices 105 for sealing oil pipes, and spherical self-sealing construction bins 3, the oil pipe plugging The device 105 is made of composite rubber, the inside is an air chamber 107, and a ring of reinforcement ring 106 is arranged on its outer wall, and the inside of the oil pipe can be sealed after the pressurized air expands to prevent crude oil from overflowing. A locking groove 104 is fixedly installed on the top of the oil pipe plugging device 105, and a one-way valve joint 103 is fixedly installed on the top of the locking groove 104. An automatic connector 2 is movably connected to the one-way valve joint 103 and the locking groove 104 to automatically connect The device 2 is in the shape of a truncated cone, and its top is provided with a first air intake pipe joint 201, which is connected with a first air intake pipe 102. There is a locking piston 204 on the inner wall of the automatic connector 2, and a locking piston 204 is provided with Lock the lock ball 206, the lower end of the locking piston 204 is provided with a spring 205, the locking piston 204 is connected to one end of the air passage 203, and the other end of the air passage 203 is provided with a second air intake pipe joint 202, which is connected to the second air intake pipe joint 202. There is a second air intake pipe 101, and the diameter of the second air intake pipe 101 is smaller than that of the first air intake pipe 102 and installed inside it; the second air intake pipe 101 and the first air intake pipe 102 are steel wire hose materials.

The upper top and the lower bottom of the spherical self-enclosed construction warehouse 3 are designed with round holes, and the two sides of the upper top of the spherical self-closed construction warehouse 3 are respectively fixedly equipped with hoisting rings 305, and the upper and lower holes are respectively equipped with an upper hydraulic expander 311 and a lower hydraulic expander. The hydraulic expander 310, the spherical self-enclosed construction warehouse 3 is provided with an inner support frame 312 for fixing the oil pipe. The inner support frame 312 is used to connect the inner support frame of the construction warehouse 2 with the upper three directions of the pipeline before the pipeline is cut to prevent the pipeline from After cutting, the construction warehouse swings without the support of the lower hole expander. After the construction is completed, the construction warehouse can be hoisted out together with the upper oil pipe for decomposition and recovery on land. The upper hydraulic expander 311 and the lower hydraulic expander 310 are connected with an air inlet 306. The upper hydraulic expander 311 and the lower hydraulic expander 310 are made of special materials, and both are hollow inside. The compression pump compresses the air into the expander through the 203 air inlet, and the upper and lower ports become smaller to coincide with the oil pipe to prevent seawater from entering and also serve as a stable support to facilitate internal construction work. The top of spherical self-enclosed construction warehouse 3 is also provided with hose joint 304, and hose joint 304 connects air pressurized pipe 301, power line 302 and suction pipe 303, and the inwall of spherical self-enclosed construction warehouse 3 is equipped with control warehouse 308 and The tool warehouse 314, the inner wall of the spherical self-enclosed construction warehouse 3 is also provided with a water hose 309, and the water hose 303 is connected with the water hose 309; the control warehouse 308 is provided with a screw bar door 402 for frogman to enter during operation . The control bin 308 and the tool bin 314 are opened and used by the control bin door switch lever 307 and the tool bin door switch lever 313 respectively. After the water in the spherical self-enclosed construction chamber 3 is drained, the tool chamber 314 can be opened for use. After opening, there are miniature electric welding machines for construction, cutting machines, air compensation nozzles and special tools. The tool chamber 314 is in a fully sealed state when it is launched. Prevent seawater from entering. One side of the screw rod door 402 is movably connected on the outer wall of the spherical self-enclosed construction warehouse 3 through the door hinge 403. The other side of the screw rod door 402 is provided with a screw rod 405, and the upper end of the screw rod 405 is provided with a screw rod. Rod rocker 404, rotate the screw rod rocker 404 to drive the screw rod 405 to open the screw rod bin door 402 easily. A water inlet valve 406 is provided at the bottom of the control chamber, and a bypass port 401 is provided at the top of the control chamber 308 .

A working method of a construction device for shutting in offshore oil wells, specifically comprising the following steps:

S1: The one-way valve joint 103 on the upper part of the oil pipe blocker 105 is connected with two pressure hoses, the second air intake pipe 101 and the first air intake pipe 102 through the automatic connector 2, and the first air intake pipe 102 is connected to the first air intake pipe joint After the 201 interface is connected, inject compressed air into the oil pipe blocker 105, and when the air pressure reaches a specified value, another second air intake pipe 101 is docked with the second air intake pipe joint 202 in the air passage 203 for inflation and pressurization. After pressurization, the driving spring 205 bounces the locking piston 204 and the locking ball 206, so that the one-way valve joint 103 and the locking groove 104 are separated from the automatic connector 2, and the oil pipe blocker 105 is left in the oil pipe;

S2: The spherical self-sealing construction bin 3 is inserted from above the oil pipe through the hoisting ring 305 . After the frogman is lowered to the predetermined construction position, the upper hydraulic expander 311 and the lower hydraulic expander 310 can expand automatically so that the diameter of the upper and lower round holes becomes smaller and closely matches the oil pipe.

S3: The frogman opens the screw bar door 402, and closes the screw bar door 402 after entering; turns on the pumping switch to pump out the seawater inside the spherical self-sealing construction storehouse 3, and the bypass port 401 at the top of the spherical self-closed construction storehouse 3 will go to the construction during pumping Air is delivered inside the chamber to balance the atmospheric pressure;

S4: After the construction is completed, the construction frogman opens the water inlet valve 406 at the bottom of the spherical self-sealing construction warehouse 3, so that seawater enters the spherical self-sealing construction warehouse 3, and the air in the warehouse is discharged through the top bypass port 401. When the internal and external water pressure is balanced , turn the screw rod rocker 404 to drive the screw rod 405 to open the hatch easily.

In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper", "lower" and so on is based on the orientation shown in the accompanying drawings. Orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the present invention; The terms "connection", "installation" and "fixation" should be understood in a broad sense, for example, "connection" can be fixed connection, detachable connection, or integral connection; it can be directly connected or through an intermediate The medium is indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the description of this specification, descriptions of the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in the present invention In at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. The construction device for the offshore oil well sealing comprises an oil pipe, an oil pipe plugging device (105) for plugging the oil pipe and a spherical self-sealing construction bin (3), and is characterized in that a locking groove (104) is fixedly arranged at the top end of the oil pipe plugging device (105), a one-way valve connector (103) is fixedly arranged at the top end of the locking groove (104), an automatic connector (2) is movably connected to the one-way valve connector (103) and the locking groove (104), a first air inlet pipe joint (201) is arranged at the top of the automatic connector (2) in a truncated cone shape, the first air inlet pipe joint (201) is connected with a first air inlet pipe (102), a locking piston (204) is arranged on the inner wall of the automatic connector (2), a locking ball (206) is arranged on the locking piston (204), a spring (205) is arranged at the lower end of the locking piston (204), the locking piston (204) is connected with one end of an air channel (203), a second air inlet pipe joint (202) is arranged at the other end of the air channel (203), the second air inlet pipe joint (202) is connected with a second air inlet pipe joint (101), and the second air inlet pipe joint (101) is smaller than the first air inlet pipe (102) and is arranged inside the first air inlet pipe;

round holes are designed on the upper top and the lower bottom of the spherical self-sealing construction bin (3), an upper hydraulic expander (311) and a lower hydraulic expander (310) are respectively arranged around the upper hole and the lower hole, an inner supporting frame (312) is arranged inside the spherical self-sealing construction bin (3) and is used for fixing an oil pipe, the upper hydraulic expander (311) and the lower hydraulic expander (310) are connected with an air inlet (306), a hose connector (304) is further arranged on the top of the spherical self-sealing construction bin (3), the hose connector (304) is connected with an air pressurizing pipe (301), a power wire (302) and a water pumping pipe (303), a control bin (308) and a tool bin (314) are arranged on the inner wall of the spherical self-sealing construction bin (3), and a water pumping hose (309) is further arranged on the inner wall of the spherical self-sealing construction bin (3), and the water pumping pipe (303) is connected with the water pumping hose (309); the control cabin (308) is provided with a screw rod cabin door (402) for frogman to enter during operation.

2. Construction equipment for offshore oil well sealing according to claim 1, characterized in that the tubing sealer (105) is made of composite rubber, the inside is an air chamber (107), a circle of reinforcing rings (106) are arranged on the outer wall of the air chamber, and the inside of the tubing can be sealed after the pressurized air is expanded.

3. Construction equipment for offshore oil well sealing according to claim 1, characterized in that the second air inlet pipe (101) and the first air inlet pipe (102) are of wire hose material.

4. Construction device for offshore oil well sealing according to claim 1, characterized in that hoisting rings (305) are fixedly mounted on two sides of the upper top of the spherical self-sealing construction bin (3) respectively.

5. Construction equipment for offshore oil well sealing according to claim 1, characterized in that the control cabin (308) and the tool cabin (314) are opened for use by controlling the cabin door opening and closing rod (307) and the tool cabin door opening and closing rod (313), respectively.

6. The construction device for offshore oil well sealing according to claim 5, wherein the control cabin (308) can be opened for use after water is pumped out, and the micro electric welder, the cutting machine, the air compensation pipe orifice and the special tool for construction are arranged in the control cabin after the control cabin is opened, and the tool cabin (314) is in a fully sealed state during water drainage.

7. The construction device for offshore oil well sealing according to claim 1, wherein one side of the screw rod bin gate (402) is movably connected to the outer wall of the spherical self-sealing construction bin (3) through a bin gate hinge (403), a screw rod (405) is arranged on the other side of the screw rod bin gate (402), a screw rod rocking handle (404) is arranged at the upper end of the screw rod (405), and the screw rod rocking handle (404) is rotated to drive the screw rod (405) to easily open the screw rod bin gate (402).

8. The construction device for offshore oil well sealing according to claim 7, wherein the bottom of the control cabin (308) is provided with a water inlet valve (406), and the top of the control cabin (308) is provided with a bypass port (401).

9. A working method of a construction device for offshore oil well sealing according to claims 1-8, characterized in that it comprises the following steps:

s1: the check valve joint (103) at the upper part of the oil pipe plugging device (105) is connected with the second air inlet pipe (101) and the first air inlet pipe (102) through an automatic connector (2), compressed air is injected into the oil pipe plugging device (105) after the first air inlet pipe (102) is connected with a first air inlet pipe joint (201) in an interface mode, after the air pressure reaches a specified value, the second air inlet pipe (101) is butted with the second air inlet pipe joint (202) in an air channel (203) for inflation and pressurization, a locking piston (204) and a locking ball (206) are sprung out by a driving spring (205) after pressurization, so that the check valve joint (103) and the locking groove (104) are separated from the automatic connector (2), and the oil pipe plugging device (105) is left in an oil pipe;

s2: sleeving the spherical self-sealing construction bin (3) from the upper part of the oil pipe through a lifting ring (305); after the frogman goes into the preset construction position, the upper hydraulic expander (311) and the lower hydraulic expander (310) automatically expand to enable the diameters of the upper round hole and the lower round hole to be reduced and closely coincide with the oil pipe,

s3: the frogman opens the screw rod bin gate (402), and closes the screw rod bin gate (402) after entering; starting a water pumping switch to pump out seawater in the spherical self-sealing construction bin (3), wherein a bypass port (401) at the top of the spherical self-sealing construction bin (3) can convey air into the construction bin to balance atmospheric pressure during water pumping;

s4: after the construction is finished, the construction frogman opens the water inlet valve (406) at the bottom of the spherical self-sealing construction cabin (3) to enable seawater to enter the spherical self-sealing construction cabin (3), air in the cabin is discharged through the top bypass opening (401), and when the internal water pressure and the external water pressure are balanced, the screw rod rocking handle (404) is rotated to drive the screw rod (405) to easily open the cabin door.

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