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A mechanically controlled reverse circulation check valve

A mechanical control and reverse circulation technology, applied in the direction of wellbore/well valve device, production fluid, wellbore/well components, etc., can solve the problems of unusable oil and gas wells, narrow use range, complicated operation, etc., and achieve reliable sealing , simple operation, wide range of effects

Active Publication Date: 2022-04-22
西安赛瑞油气技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Often this kind of operation needs to rely on the locator to reciprocate for positioning, which has the disadvantages of complex operation, low efficiency, high risk, and cannot be used for oil and gas wells with large slopes, and the use range is narrow

Method used

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  • A mechanically controlled reverse circulation check valve
  • A mechanically controlled reverse circulation check valve
  • A mechanically controlled reverse circulation check valve

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Embodiment Construction

[0021] The mechanically controlled reverse cycle check valve consists of an upper joint 1, a lower joint 2, a mandrel 3, an indicating claw 4 and a valve body 5. One end of the mandrel 3 is threaded with an upper joint 1, and the upper joint 1 and the mandrel 3 Set screws 6 are used to limit the position in the circumferential direction; the upper joint 1 and the mandrel 3 are kept sealed by a sealing ring. The other end of the mandrel 3 is screwed with a lower joint 2; a sealing ring is arranged between the lower joint 2 and the mandrel 3. The mandrel 3 is a tubular body, and the central part of the mandrel 3 is provided with a stepped central hole through hole. A ball seat 7 is movably installed in the mandrel 3, and the ball seat 7 is a tubular body, and the circumference of one end of the ball seat 7 is evenly distributed with flow holes 8. The core shaft 3 at one end of the ball seat 7 is provided with a deflector 9, which is disc-shaped, and the central part of the defl...

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Abstract

The invention relates to a mechanically controlled reverse circulation check valve, which belongs to the field of downhole operation tools for oil and gas wells. It consists of an upper joint, a lower joint, a mandrel, an indicating claw and a valve body. A plurality of indicating claws and positioning claws are installed on the circumference of the mandrel. One end of the indicating claw is provided with a guide pin, and the mandrel corresponding to the guide pin A slide hole is arranged on the top, and one end of the guide pin passes through the slide hole and is connected with the ball seat. The check valve not only has the function of opening and closing the filling sliding sleeve of the switching tool, but also has the function of one-way flow of the reverse circulation check valve. At the same time, it has a linkage function. Reverse circulation can be carried out at the same time; it solves the problem that the existing switch tools need to rely on the locator for reciprocating positioning, which has complex operation, low efficiency, high risk, and cannot be used for oil and gas wells with large slopes, and the scope of use is narrow problems; especially suitable for oil and gas well filling operations.

Description

technical field [0001] The invention relates to a mechanically controlled reverse circulation check valve, which belongs to the field of downhole operation tools for oil and gas wells. Background technique [0002] In the field of oil field sand control, the commonly used mechanical sand control method is gravel packing sand control technology, that is, the pipe string is placed in the filling position, and the gravel packing operation is carried out in positive circulation. excess gravel. This process is achieved through the use of reverse cycle check valves and switching tools. The main function of the reverse cycle check valve is to control the direction of fluid flow through the opening of the valve. During the reverse circulation operation, the ball is seated on the ball seat to play a sealing role. After the fluid in the annular space enters the tubing, it is blocked here, and the lower channel is closed, and then the fluid changes the flow direction and is discharge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/04E21B34/14
CPCE21B43/04E21B34/14
Inventor 杨国王璞陶风王琼王慧张健朱向斌阎新颖席浩腾
Owner 西安赛瑞油气技术服务有限公司
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