阅读说明：本技术 一种油管外密封旋塞阀连接器 (Oil pipe external sealing plug valve connector ) 是由 张毅 杨东 李进 魏志红 任勇强 朱其亮 杨小涛 薛建国 王林 魏磊 刘晓林 于 2019-09-24 设计创作，主要内容包括：本发明公开了一种油管外密封旋塞阀连接器,其包括了旋塞阀连接头、密封圈、接箍密封胶桶、连接器外壳、卡块、弹簧、背环组成。使用时,首先旋转背环上行,推动卡块内缩卡住油管接箍台肩底部,再旋转旋塞阀连接头使其下行,压缩接箍密封胶桶抱紧油管接箍,起到密封油管接箍的目的。使用本发明可以解决当井内油管接箍螺纹破损而无法安装旋塞阀的问题。(The invention discloses an oil pipe outer sealing plug valve connector which comprises a plug valve connector, a sealing ring, a coupling sealing rubber barrel, a connector shell, a clamping block, a spring and a back ring. When the rotary plug valve connector is used, the back ring is rotated to move upwards to push the fixture block to retract inwards to clamp the bottom of the circular bead of the tubing coupling, the plug valve connector is rotated to move downwards to compress the coupling sealing rubber barrel to hold the tubing coupling tightly, and the purpose of sealing the tubing coupling is achieved. The invention can solve the problem that the plug valve can not be installed when the threads of the oil pipe coupling in the well are damaged.)

1. The utility model provides an oil pipe external seal cock valve connector, a serial communication port, including cock valve connector (5), sealing washer (2), coupling sealant bucket (7), connector shell (6), fixture block (8), spring (3), back ring (9), connector shell (6) are the cylinder, the inner wall of cylinder has the step, and first half internal diameter is greater than the lower half internal diameter, first half external diameter of outer wall of corresponding cylinder is greater than the lower half external diameter, the upper portion of connector shell (6) has the internal thread, the lower part has the external screw thread, four link up round holes of connector shell lower half lateral wall equipartition, a lower part for connecting cylindric cock valve connector (5) of plug valve passes through threaded connection on the internal thread of connector shell (6), cock valve connector (5) upper portion inner wall has the internal thread that matches with the plug valve screw thread, the threaded connection department of cock connector (5) and connector shell (6) is provided with the sealed cock valve connector that is used for sealing the internal The sealing ring (2) and the coupling sealing rubber barrel (7) are placed on a step of the connector shell (6) and located below the plug valve connector (5) and used for sealing the coupling of the oil pipe, the back ring (9) is in a cylindrical shape with an expanded diameter at the upper part, internal threads are arranged on the inner wall of the lower part of the back ring and are in threaded connection with external threads of the connector shell (6), springs (3) with clamping blocks at two ends are inserted into a round hole in the lower half part of the connector shell, and the clamping block (8) on the outer side is provided with a slope surface matched with the slope of the inner wall of the expanded diameter part of the back ring (9), so that the back ring pushes the clamping block to contract inwards to clamp the bottom of the shoulder.

2. The oil pipe outer sealing cock valve connector according to claim 1, characterized in that the outer wall of the cock valve connector (5) is provided with a connector handrail (1) for assisting manual rotation.

3. The oil pipe outer seal cock valve connector as claimed in claim 1, characterised in that the back ring (9) outer wall is provided with a back ring handrail (4) for assisting manual rotation.

Technical Field

The invention relates to the field of petroleum and natural gas exploitation, in particular to an oil pipe outer sealing plug valve connector which is used for solving the problem that a plug valve cannot be installed when a coupling thread of an oil pipe in a well is damaged.

Background

The well control equipment is used for preventing well blowout, wherein the plug valve is important well control equipment used for sealing pressure in the oil pipe, and the plug valve ball valve can be directly connected with the oil pipe in a buckling mode and then closed when the well control equipment is used. In the process of oil and gas well development, especially gas well completion operation, an airtight oil sealing pipe is mostly used, and the oil sealing pipe is sealed by the extrusion of a soft metal shoulder of internal threads of the oil sealing pipe. Maintenance operations are often required after a gas well is produced for a period of time, and the soft metal shoulder of the airtight oil sealing pipe can be damaged under long-term extrusion, so that a plug valve cannot be installed. If blowout occurs in the process of lifting and lowering the air-tight oil pipe, the adverse blowout out-of-control result can be caused by the fact that the plug valve cannot be installed in time to close the well due to damage of the oil pipe thread.

Disclosure of Invention

The invention aims to solve the technical problem of providing an oil pipe outer sealing plug valve connector, which is used for solving the problem that a plug valve cannot be installed when a coupling thread of an oil pipe in a well is damaged.

In order to solve the technical problems, the invention adopts the technical scheme that: an oil pipe external sealing cock valve connector comprises a cock valve connector, a sealing ring, a coupling sealing rubber barrel, a connector shell, a clamping block, a spring and a back ring, wherein the connector shell is a cylinder, the inner wall of the cylinder is provided with steps, the inner diameter of the upper half part is larger than that of the lower half part, the outer diameter of the upper half part of the outer wall of the corresponding cylinder is larger than that of the lower half part, the upper part of the connector shell is provided with internal threads, the lower part of the connector shell is provided with external threads, four through round holes are uniformly distributed on the side wall of the lower half part of the connector shell, the lower part of the cylindrical cock valve connector for connecting a cock valve is connected on the internal threads of the connector shell through threads, the inner wall of the upper part of the cock valve connector is provided with internal threads matched with the cock valve threads, the sealing ring, the back ring is in a cylindrical shape with the upper part provided with an expanded diameter, the inner wall of the lower part of the back ring is provided with internal threads and is in threaded connection with external threads of the connector shell, a spring with clamping blocks at two ends is inserted into a round hole in the lower half part of the connector shell, the clamping block on the outer side is provided with a slope surface matched with the slope of the inner wall of the expanded diameter part of the back ring, and the clamping block is pushed to contract inwards to clamp the bottom of the shoulder of the oil pipe coupling when the back ring rotates upwards.

The outer wall of the plug valve connector is provided with a connector handrail for assisting manual rotation.

The back of the body encircles the outer wall and is provided with the back of the body ring handrail that is used for assisting the manpower rotatory.

The invention has the beneficial effects that: by using the connector, the plug valve can be quickly installed under the condition that the oil pipe thread is damaged and the plug valve cannot be normally installed, so that the operation safety during the construction of an oil-gas well is ensured.

Drawings

FIG. 1 is a schematic structural view of an external tubing seal plug valve connector of the present invention;

FIG. 2 is a schematic view of the connection of the oil pipe outer sealing cock valve connector of the present invention with a cock valve and an oil pipe;

In the figure, 1-plug valve connector handrail; 2-sealing rubber ring; 3-a spring; 4-back ring handrail; 5-plug valve connector; 6-connector housing; 7-coupling sealant barrel; 8-a fixture block; 9-dorsal loop; 10-plug valve; 11-oil pipe.

Detailed Description

The external tubing plug valve connector of the present invention will be described in detail with reference to the accompanying drawings.

As shown in figures 1 and 2, the oil pipe external sealing cock valve connector comprises a cock valve connector 5, a sealing ring 2, a coupling sealing rubber barrel 7, a connector shell 6, a fixture block 8, a spring 3 and a back ring 9, wherein the connector shell 6 is a cylinder, the inner wall of the cylinder is provided with steps, the inner diameter of the upper half part is larger than that of the lower half part, the outer diameter of the upper half part of the outer wall of the corresponding cylinder is larger than that of the lower half part, the upper part of the connector shell 6 is provided with internal threads, the lower part of the connector shell is provided with external threads, four through round holes are uniformly distributed on the side wall of the lower half part of the connector shell, the lower part of the cylindrical cock valve connector 5 for connecting the cock valve is connected on the internal threads of the connector shell 6 through threads, the inner wall of the upper part of the cock valve connector 5 is provided with internal threads matched, the coupling sealing rubber barrel 7 is placed on a step of the connector shell 6 and located below the plug valve connector 5 and used for sealing the oil pipe coupling, the back ring 9 is in a cylindrical shape with an expanded diameter at the upper part, an inner wall of the lower part of the back ring is provided with an inner thread and is in threaded connection with an outer thread of the connector shell 6, the spring 3 with the clamping blocks at two ends is inserted into a round hole in the lower half part of the connector shell, the clamping block 8 on the outer side is provided with a slope surface matched with an inner wall slope of the expanded diameter part of the back ring 9, and the clamping block is pushed to contract inwards to clamp the bottom of the oil pipe coupling shoulder when the.

The outer wall of the plug valve connector 5 is provided with a connector handrail 1 for assisting manual rotation. The outer wall of the back ring 9 is provided with a back ring handrail 4 for assisting the manual rotation.

When the blowout takes place, oil pipe 11 embolias in the oil pipe external seal cock valve connector, plug valve 10 is twisted on plug valve connector 5, it is rotatory to drive back ring 9 through back ring handrail 5, back ring 9 goes upward along connector shell 6 through connecting thread, compress the 8 internal shrinkages of fixture block, block oil pipe 11 coupling circular bead bottom, rotatory plug valve connector handrail 1, it is down along connector shell 6 through connecting thread, force coupling packing rubber barrel 7 internal shrinkages, hold tight oil pipe 11's coupling, accomplish the installation of oil pipe external seal cock valve connector this moment, only need close plug valve 10 this moment and can accomplish and close the well.

Well blowout control is achieved, when disassembly is needed, only the back ring 9 needs to be rotated reversely, the clamping block 8 resets under the action of the spring 3, the clamping block 8 does not clamp the bottom of the coupling shoulder of the oil pipe 11 any more, and the connector is taken down.

The sealing rubber ring 2 is arranged on the plug valve connector 5 and used for sealing the pressure in the oil pipe; the oil pipe outer sealing cock valve connector can be used for oil and gas wells with the pressure grade of 35Mpa or below; the clamping block 8 clamps the bottom of the shoulder of the coupling of the oil pipe 11, so that the upward movement of the connector under the action of the pressure in the well can be prevented; after being clamped, the four clamping blocks 5 can bear at least 30t of jacking force; the coupling sealing rubber barrel 7 is slightly larger than the outer diameter of the tubing 11 coupling, and the plug valve connector 5 can hold the tubing 11 coupling tightly to realize sealing only by descending a small distance; the oil pipe outer sealing cock valve connector realizes the well closing operation under the combined action of the abutting hoop sealing rubber barrel 7 and the cock valve 10, and the oil pipe outer sealing cock valve connector is required to be used together with the cock valve 10 when in use.

The external sealing plug valve connector is used for quickly mounting the plug valve when the plug valve cannot be normally mounted due to the damaged oil pipe threads. Its theory of operation is in oil pipe embolias oil pipe external seal cock valve connector, twists the plug valve on the plug valve connector, and it is rotatory to drive the back of the body ring through back of the body ring handrail, and the back of the body ring passes through connecting thread and goes upward along the connector shell, and the compression fixture block is internal-contracting, blocks the fixed this connector of oil pipe coupling circular bead bottom, and rotatory plug valve connector handrail is through connecting thread down along the connector shell, forces the interior shrink of coupling sealing rubber barrel, holds tightly the oil pipe coupling and accomplishes sealedly, only needs to close the plug valve this moment and can accomplish and close the well. When the connector needs to be detached, the back ring only needs to be rotated reversely, the clamping block resets under the action of the spring, and the connector is taken down.

in summary, the disclosure of the present invention is not limited to the above-mentioned embodiments, and persons skilled in the art can easily set forth other embodiments within the technical teaching of the present invention, but such embodiments are included in the scope of the present invention.