Multistage fracturing pitching control tool

A technology for controlling tools and fracturing, which is applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc. It can solve the problem of limited number of fracturing layers, shorten fracturing operation time, and avoid fracturing operation failure , the effect of reducing the risk of operational errors

Active Publication Date: 2018-09-28
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a multi-stage fracturing ball control tool, which is used to solve the problem of the limited number of fracturing layers of the existing ball-type fracturing tools, and can improve the overall fracturing operation. Efficiency, shorten construction period

Method used

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  • Multistage fracturing pitching control tool
  • Multistage fracturing pitching control tool
  • Multistage fracturing pitching control tool

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Embodiment Construction

[0020] The present invention will be further explained below in conjunction with the drawings:

[0021] Combine figure 1 , figure 2 , image 3 , Figure 4 As shown, this multi-stage fracturing ball control tool includes a fracturing port control part and a variable diameter ball seat control part. The fracturing port control part is controlled by the variable diameter ball seat control part. The control part of the ball seat is connected by cylinder Ⅱ8.

[0022] The fracturing port control part includes a cylinder tube I22, the upper part of the cylinder tube I22 is connected to the top tube 5, the upper end of the rubber tube shaft 3 is connected to the upper joint 1, and the lower end of the rubber tube shaft 3 is arranged between the top tube 5 and the cylinder tube I22, and the rubber tube shaft 3 The lower end is fastened to the outside of the cylinder tube I 22, a plurality of rubber cylinders 4 are sequentially placed outside the rubber cylinder shaft 3, and the rubber cyli...

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Abstract

The invention relates to a multistage fracturing pitching control tool. The multistage fracturing pitching control tool comprises a fracturing opening control part and a variable-diameter ball seat control part, wherein the fracturing opening control part is controlled by the variable-diameter ball seat control part. The fracturing opening control part comprises a cylinder I, a sliding sleeve holeis formed in the middle of a fracturing sliding sleeve, an annular cavity is formed between a rubber cylinder shaft and the fracturing sliding sleeve, and the sliding sleeve hole communicates with the annular cavity. The annular cavity communicates with one end of a rubber cylinder shaft hole, and an inner cavity of an ejection cylinder communicates with the other end of the rubber cylinder shafthole. A variable-diameter ball seat is installed in the cylinder I, the variable-diameter ball seat is a C-shaped ring, the contact part between the variable-diameter ball seat and a fracturing sliding sleeve base is a conical inclined surface, and the variable-diameter ball seat is connected to the upper end of a piston. The variable-diameter ball seat control part comprises a switch ring base,and opening and closing control of an L-shaped fracturing fluid channel in the switch ring base by a switch ring is realized by the action of a torsion spring. According to the multistage fracturing pitching control tool, the failure of fracturing operation caused by incorrect pitching sequence is avoided, and the risk of operational errors in the fracturing operation is reduced.

Description

Technical field: [0001] The invention relates to the technical field of oil extraction machinery and equipment in the petroleum industry, and specifically relates to a multi-stage fracturing ball control tool. Background technique: [0002] At present, the quality of oilfield reservoirs has shifted from relatively high-quality to inferior quality. Low-permeability and ultra-low-permeability oil and gas reserves are becoming the main production body in my country's major oilfields. At the same time, fracturing technology is required for the development of unconventional oil and gas such as shale gas and tight oil and gas. For pitch-controlled fracturing tools, due to the limitation of the size of the fracturing ball, the number of fracturing layers in one pipe string has been severely restricted. Previously, it was proposed to use a variable diameter ball seat to solve the problem of the size limitation of the fracturing ball. , But because the variable diameter ball seat control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B34/14
CPCE21B34/14E21B43/26
Inventor 杜永军胡卫李权葛翰林
Owner NORTHEAST GASOLINEEUM UNIV
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