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Unlimited layer fracturing process

A process method and layer-limited technology, applied in the field of unlimited layer fracturing technology, can solve the problems of limited number of fracturing layers, low operation efficiency, high construction risk, etc., achieve convenient use, simple string structure, and improve fracturing effect and work efficiency

Active Publication Date: 2012-06-27
四机赛瓦石油钻采设备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, multi-stage fracturing (acidizing, acid fracturing) in oilfields generally adopts the method of mechanical ball throwing for staged fracturing. Therefore, the inner diameter of the sliding sleeve and the fracturing ball are different for each stage. From bottom to top, the diameter of the ball increases step by step. Exceeding the inner diameter of the upper tool, not only the installation is complicated, the operation efficiency is low, the construction risk is high, and there are disadvantages of limited number of fracturing layers

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] Such as figure 1 As shown, a kind of unlimited layer fracturing process method provided by the present invention, taking 3 layers of fracturing as an example, includes the following steps:

[0017] (1) To make the fracturing process string, the guide plug 1, the seat seal ball seat 2, the 1st stage unlimited layer fracturing sliding sleeve 3, the packer 4, the pipe string telescopic compensator, and the 2nd stage unlimited lamination Fracture sleeve 5, packer 6, pipe string telescopic compensator, 3-stage unlimited fracturing sleeve 7, packer 8, hanger 9 are connected sequentially from bottom to top to form a string;

[0018] (2) Send the tubing string made in step (1) to the predetermined setting position, set all the packers at once, then set the hanger 9, throw 1-level signal ball 10, and open the 1-level with no layer limit Fracturing sleev...

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Abstract

The invention relates to the technical field of oil and gas field fracturing and provides an unlimited layer fracturing process, which comprises the following steps: manufacturing a fracturing process pipe column, connecting a guiding plug, a seal ball seat, a first-stage unlimited layer fracturing sliding sleeve, a packer, a pipe column telescopic compensator, a second-stage unlimited layer fracturing sliding sleeve, a packer, a pipe column telescopic compensator to an n-stage unlimited layer fracturing sliding sleeve, a packer with a hanger from bottom to top in sequence into a single pipe column; delivering the single pipe column to a position to be sealed; sealing all the packers at a time; then sealing the hanger; throwing a first-stage ball arm or a ball; opening the first-stage unlimited layer fracturing sliding sleeve; fracturing a first layer; throwing a second-stage ball arm or a ball; opening the second-stage unlimited layer fracturing sliding sleeve; fracturing a second layer and the like until opening the n-stage unlimited layer fracturing sliding sleeve and fracturing an n layer, wherein n is a fracturing stage number. The unlimited layer fracturing process has the advantages that the pipe column has a simple structure, the fracturing construction period is short, the fracturing stage number is unlimited and the reliability is high.

Description

technical field [0001] The invention relates to the technical field of fracturing in oil and gas fields, in particular to an unlimited-layer fracturing process. Background technique [0002] At present, multi-stage fracturing (acidizing, acid fracturing) in oilfields generally adopts the method of mechanical ball throwing for staged fracturing. Therefore, the inner diameter of the sliding sleeve and the fracturing ball are different for each stage. From bottom to top, the diameter of the ball increases step by step. If the inner diameter of the upper tool is exceeded, the installation is complicated, the operation efficiency is low, the construction risk is high, and there are disadvantages such as limited number of fracturing layers. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a method for realizing unlimited-layer fracturing of a single string in a low-permeability o...

Claims

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Application Information

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IPC IPC(8): E21B43/26E21B34/14
Inventor 赵俊峰邹刚宁祎刘磊卢刚
Owner 四机赛瓦石油钻采设备有限公司
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