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Acid fracturing pipe column ball seat capable of fishing and being used repeatedly

A technology of ball seat and acid fracturing, which is applied in the direction of mining fluid, wellbore/well parts, earthwork drilling and mining, etc. It can solve problems such as grinding and milling, and achieve the effects of reducing labor intensity, speeding up the progress, and being easy to process

Active Publication Date: 2013-05-08
新疆聚航石油工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solved the problem that the bottom of the well could not be salvaged and had to be milled

Method used

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  • Acid fracturing pipe column ball seat capable of fishing and being used repeatedly

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] Such as figure 1 As shown, a salvageable and reusable acid-fracturing pipe string ball seat is mainly salvaged by the ball seat body 1, the steel ball 2, the O-ring 3, the ball seat shear pin 4, the anti-dropping ball seat 5, and the outer tube of the ball seat. The head 6, the shear pin 7, the coupling 8, the tee basket [centering cylinder] 9, the bottom plug [guide shoe] 10, the elastic centralizer 11, and the inner window overshot 12.

[0012] The oil pipe threaded connection of the body of the acid-fracturing tube tail ball seat can neither hook the anti-dropping ball seat 5, but also salvage the inner window overshot 12 of the outer tube of the ball seat and the anti-dropping ball seat 5. It can ensure that the shot down steel ball 2 is always in the ball seat and does not fall to the bottom of the well as a fallen object. The anti-dropping ball seat 5 and the outer cylinder of the ball seat 6 are hung with a shoulder and cut with a shear pin 7 The connected one can ...

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Abstract

The invention discloses an acid fracturing pipe column ball seat capable of fishing and being used repeatedly. The acid fracturing pipe column ball seat is characterized in that an inward opening window fishing cylinder is connected to the bottom of a ball seat body of an acid fracturing pipe tail; a ball falling prevention ball seat is connected to the interior of the ball seat body of the acid fracturing pipe tail through a pin; the ball falling prevention ball seat and a ball seat outer cylinder fishing head are hooked by a shoulder and connected through the pin; the ball seat outer cylinder fishing head and a ball seat basket (a centralizing cylinder) are connected through an oil pipe coupling; by an elastic centralizer, the whole ball seat which is hit to fall off can be basically positioned in the center of a borehole for fishing; and by a bull nose ( a guiding shoe), the conditions that the elastic centralizer slips off through the outer wall of the ball seat basket (the centralizing cylinder), and after the pin of the ball falling prevention ball seat and the ball seat outer cylinder fishing head is cut off, the ball falling prevention ball seat and the ball seat outer cylinder fishing head fall into a downhole through the ball seat basket (the centralizing cylinder) and become falling substances can be avoided. When an acid fracturing pipe column is tripped, the ball seat and other accessories which are hit to fall to the downhole before acid fracturing can be fished directly at one time; and the acid fracturing pipe column ball seat can be used repeatedly and is safe and reliable.

Description

Technical field [0001] The invention relates to acid fracturing or acid fracturing for oil and gas testing and the entire process of oil and gas production when there is an oil and gas display during oil and gas drilling. If the industrial oil and gas flow cannot be formed after acid fracturing, if other measures are needed during drilling or oil production or gas production, the ball seats and balls that were shot down before acid fracturing can be directly retrieved before the pipe string is lifted. The next step is to continue the safe drilling and the improvement measures to clean the bottom of the well and it can be reused. Background technique [0002] During the oil drilling and drilling process, after the oil and gas show, during the test production process, the acid fracturing or the oil and gas acid fracturing construction, the packer before the acid fracturing is sealed and the ball seat and the ball at the tail of the tubing string are shot down to make it It drops d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/27E21B31/18
Inventor 慕武慕渊明韦西海方岩杨小栋连文明谢银寰陈军李薇覃伟伟
Owner 新疆聚航石油工程技术有限公司
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