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Fracture sliding sleeve with dissoluble ball seat and fracturing method

A technology for fracturing sliding sleeves and ball seats, which is applied in earth-moving drilling, wellbore/well valve devices, and production fluids, etc., and can solve problems such as affecting the running of downhole tools.

Inactive Publication Date: 2015-03-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a fracturing sliding sleeve with a dissolvable ball seat and a fracturing method to solve the problem in the prior art that the ball seat affects the running of downhole tools after the fracturing is completed

Method used

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  • Fracture sliding sleeve with dissoluble ball seat and fracturing method
  • Fracture sliding sleeve with dissoluble ball seat and fracturing method

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Embodiment Construction

[0035] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0036] Such as figure 1 , figure 2 As shown, the present invention provides a fracturing sleeve with a dissolvable ball seat, including an upper joint 1 , an outer cylinder 2 , an inner cylinder 3 , a ball seat 4 and a lower joint 6 . Among them, the outer cylinder 2 is connected to the lower end of the upper joint 1, the side wall of the outer cylinder 2 is penetrated with a liquid hole 22, and the lower end of the outer cylinder 2 is connected to the lower joint 6; the inner cylinder 3 is axially movable and socketed inside the outer cylinder 2 , and open or close the liquid hole 22 by axial movement; the ball seat 4 is sleeved on the inside of the inner cylinder 3 for seating the fracturing ball. The protruding platform 42 ...

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Abstract

The invention provides a fracture sliding sleeve with a dissoluble ball seat and a fracturing method. The fracture sliding sleeve comprises an upper connector, an outer barrel connected to the lower end of the upper connector, an inner barrel sleeved with the inner side of the outer side in an axial moving mode and the ball seat sleeved with the inner side of the inner barrel, a liquid passing hole is formed in the side wall of the outer barrel in a penetrating mode, and the lower end of the outer barrel is connected with a lower connector. The inner barrel axially moves to open or close the liquid passing hole. An annular boss is arranged on the outer wall of the ball seat in the circumferential direction, and the ball seat is made of magnalium, and can be dissolved in mineral water. According to the fracturing method, a fracturing ball is thrown into a well and pressed, the annular boss of the ball seat is shorn off, a ceramic anticorrosion layer is damaged, the ball seat drives the inner barrel to move downwards, the sliding sleeve is opened, fracturing is executed, and the magnalium of the annular boss of the ball seat and formation water are in contact to generate a dissolution reaction. After the fracturing construction is completed for a period of time, the ball seat is dissolved completely, the inner diameter of the sliding sleeve is identical to that of a sleeve pipe, the full diameter of a completion pipe string is fractured, and downhole tools can be tripped into the well bottom without obstacles.

Description

technical field [0001] The invention relates to a downhole tool in the field of oil production, in particular to a fracturing sliding sleeve with a dissolvable ball seat and a fracturing method. Background technique [0002] Fracturing is an important means to effectively develop and produce low-permeability oil and gas fields, tight oil and gas fields, and shale gas. Among them, the multi-stage fracturing technology of ball-sliding sleeves with open hole packers is a widely used multi-stage fracturing technology for horizontal wells. [0003] With the current multi-stage fracturing technology of ball-sliding sleeves for open-hole packers, after the fracturing is completed, the ball seat in the wellbore will cause the following problems: the more the number of fracturing stages is, the more ball-sliding sleeves in the completion string will be. The more you run in, the smaller the inner diameter of the ball seat will make the production logging test tool unable to go down to...

Claims

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Application Information

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IPC IPC(8): E21B34/06E21B43/26
CPCE21B34/063E21B34/14E21B43/26
Inventor 王新忠魏松波薛建军付涛裴晓含李明
Owner PETROCHINA CO LTD
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