Fracturing short section and fracturing pipe string including fracturing short section

A sub-joint and fracturing technology, which is used in the production of fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems of high cost, affecting the running of downhole tools, and long cycle.

Active Publication Date: 2019-01-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to ensure the production and secondary reconstruction of the traditional sliding sleeve segmental fracturing tools, ball seat drilling is required to realize the full diameter of the wellbore, otherwise, the running of downhole tools will be affected.
This drill-out construction method has a long cycle and high cost

Method used

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  • Fracturing short section and fracturing pipe string including fracturing short section
  • Fracturing short section and fracturing pipe string including fracturing short section
  • Fracturing short section and fracturing pipe string including fracturing short section

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Experimental program
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Effect test

Embodiment Construction

[0028] The present invention will be further described below in conjunction with accompanying drawing.

[0029] figure 1 A frac sub 100 according to the present invention is shown. The fracturing sub 100 includes a body 1 , an inner sliding sleeve 2 , a ball seat 3 and a ball 4 . Wherein, the main body 1 is cylindrical, and a circulation hole 11 is arranged on the wall thereof for transporting fracturing fluid to the outside. The inner sliding sleeve 2 is arranged in the inner cavity of the body 1 and is used to block the circulation hole 11 in an initial state. Under the action of the second hydraulic pressure, the inner sliding sleeve 2 can move relative to the main body 1 to expose the circulation hole 11. In this case, the fracturing operation can be performed. The ball seat 3 is arranged in the inner cavity of the inner sliding sleeve 2, and is used for cooperating with the dropped ball 4 to block the inner channel of the inner sliding sleeve 2, thereby realizing press...

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PUM

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Abstract

The invention provides a fracturing short section and a fracturing pipe string including the fracturing short section. The fracturing short section includes a cylindrical body, an inner sliding sleevewhich is arranged in an inner cavity of the body and is used for sealing a circulation hole, a ball seat arranged in an inner cavity of the inner sliding sleeve, and a ball matched with the ball seat, wherein the circulation hole communicating with the inside and the outside is disposed on a wall of the body, under the action of the first hydraulic force, the ball seat moves downwards relative tothe inner sliding sleeve, under the action of the second hydraulic force, the inner sliding sleeve moves downwards relative to the body, and the ball seat is constructed to be soluble to move away from the inner sliding sleeve after the inner sliding sleeve moves downwards. The fracturing short section is advantaged in that the full diameter of the fracturing pipe string can be conveniently realized.

Description

technical field [0001] The invention relates to the technical field of downhole tools for oil and gas wells, in particular to a fracturing nipple and a fracturing pipe string containing it. Background technique [0002] Multi-stage sliding sleeve staged fracturing technology is a new completion technology that has developed rapidly in the field of oil and gas well engineering technology in recent years. As an important means of unconventional oil and gas resource exploitation, it is mainly used in shale gas and low permeability oil Fracturing stimulation of directional wells and horizontal wells in production zones. [0003] This technology can use packers to divide the horizontal well into several sections according to the formation address conditions and the needs of reservoir development, and put pressure-suppressing balls from small to large into the well through the ball-throwing control device to open the sliding sleeve step by step. Targeted staged fracturing of prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26
CPCE21B43/26
Inventor 薛占峰朱和明韩峰侯乃贺崔晓杰戴文潮
Owner CHINA PETROLEUM & CHEM CORP
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