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Pressure test ball seat with circulation function

A technology of circulation function and ball seat, which is applied to the valve device of wellbore/well, wellbore/well components, earth-moving drilling and production, etc., can solve the problems of safety risks and increase of wellhead pump pressure, and reduce the use of floating hoop , the effect of high safety

Pending Publication Date: 2021-12-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because there is no constraint on the ball, the ball will roll during the later flowback, which may cause a sudden increase in the wellhead pump pressure, posing a safety risk

Method used

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  • Pressure test ball seat with circulation function
  • Pressure test ball seat with circulation function
  • Pressure test ball seat with circulation function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 1 As shown, the pressure test ball seat 10 with circulation function according to the embodiment of the present invention includes an upper joint 1 , a ball seat 2 , a ball receiving seat 3 and a lower joint 4 . Wherein, the upper joint 1 is provided with at least one circulation hole 11, the upper joint 1 is sleeved on the ball seat 2, and the ball seat 2 can move in the axial direction. The ball receiving seat 3 is located on the end of the upper joint 1 away from the throwing direction. One end of the ball seat 2 near the pitching direction is provided with an elastic part 21 capable of radial contraction, and one end of the elastic part 21 near the pitching direction is provided with a positioning boss 211, and the inner wall of the upper joint 1 is provided with a positioning boss 211 to form a fit. The first positioning groove 12. The lower joint 4 is connected with the upper joint 1 . According to the pressure test ball seat with circulation fun...

Embodiment 2

[0055] Such as Figure 6 As shown, the pressure test ball seat 10' with circulation function according to this embodiment includes an upper joint 1, a ball seat 2', a ball seat 3 and a lower joint 4. Wherein, the upper joint 1 is provided with at least one circulation hole 11, the upper joint 1 is sleeved on the ball seat 2', and the ball seat 2' can move in the axial direction. The ball receiving seat 3 is located on the end of the upper joint 1 away from the throwing direction. An elastic part 21' capable of radial contraction is provided on the ball seat 2' near the end of the pitching direction, and a positioning boss 211' is provided on the elastic part 21' near the end of the pitching direction. The platform 211 ′ forms a cooperating first positioning groove 12 . The lower joint 4 is connected with the upper joint 1 . According to the pressure test ball seat with circulation function of the embodiment of the present invention, the circulation channel is opened when en...

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PUM

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Abstract

The invention provides a pressure test ball seat with a circulation function. The pressure test ball seat comprises an upper joint, a ball seat, a ball receiving seat and a lower joint, wherein at least one circulating hole is formed in the upper joint, the upper joint is arranged on the ball seat in a sleeving mode, and the ball seat can move in the axial direction; the ball receiving seat is located at the end, away from the ball throwing direction, of the upper joint; an elastic component capable of shrinking in the radial direction is arranged at the end, close to the ball throwing direction, of the ball seat, a positioning boss is arranged at the end, close to the ball throwing direction, of the elastic component, and a first positioning groove matched with the positioning boss is formed in the inner wall of the upper joint; and the lower joint is connected with the upper joint. The pressure test ball seat with the circulation function can verify whether a pipe column leaks or not, a circulation channel can be established again after verification is completed, and the safety risk caused by sudden rising of a wellhead pump pressure due to ball rolling is avoided.

Description

technical field [0001] The invention belongs to the technical field of oil and gas drilling and completion, and in particular relates to a pressure test ball seat with circulation function. Background technique [0002] For oil and gas wells that need to be reinserted, in order to verify the sealing reliability of the reinserted pipe string, it is necessary to set a pressure test ball seat at the bottom of the pipe string. The ball seat needs to have a circulation function when entering the well. After the pipe string is reinserted, it can be verified whether the reinserted pipe string is sealed and reliable. After the verification, the circulation channel needs to be established again. There are mainly two types of pressure test ball seats in the prior art: one is to pressurize the ball seat after the pressure test is over, and to form a channel again, and the ball and the ball seat will fall into the bottom of the well, which will form downhole falling objects; After pres...

Claims

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Application Information

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IPC IPC(8): E21B34/14E21B47/117
CPCE21B34/14Y02E30/30
Inventor 周怡君侯治民陈晨崔警宇滕汶江刘涛赵伟胡丹钱江
Owner CHINA PETROLEUM & CHEM CORP