Fracturing sliding sleeve and fracturing pipe string including fracturing sliding sleeve

A technology for fracturing sliding sleeves and inner sleeves, which is applied in the direction of casing, drill pipe, wellbore/well valve device, etc., and can solve the problems of high cost, long cycle, and affecting the running of downhole tools

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 sliding sleeve and fracturing pipe string including fracturing sliding sleeve
  • Fracturing sliding sleeve and fracturing pipe string including fracturing sliding sleeve
  • Fracturing sliding sleeve and fracturing pipe string including fracturing sliding sleeve

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Experimental program
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Effect test

Embodiment Construction

[0027] The present invention will be further described below in conjunction with accompanying drawing.

[0028] figure 1 and figure 2 Different states of the frac sleeve 100 according to the present invention are shown. Such as figure 1 and 2 As shown, the fracturing sliding sleeve 100 includes an outer shell 2 , an inner sleeve 3 , a ball seat 5 and a ball 8 . Wherein, the casing 2 is cylindrical, and a circulation hole 21 communicating with the inside and the outside is provided on the wall thereof, so as to transport the fracturing fluid to the outside. The inner sleeve 3 is arranged in the inner cavity of the outer shell 2, and is used to block the circulation hole 21 in the initial state, such as figure 1 shown. Under the action of hydraulic pressure, the inner casing 3 can move relative to the outer casing 2 to expose the circulation hole 21. In this case, the fracturing operation can be performed, such as figure 2 shown. The ball seat 5 is fixedly arranged in ...

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Abstract

The invention provides a fracturing sliding sleeve and a fracturing pipe string including the fracturing sliding sleeve. The fracturing sliding sleeve includes a cylindrical casing, an inner sleeve which is arranged in an inner cavity of the casing and is used for sealing a circulation hole, a ball seat arranged in an inner cavity of the inner sleeve, and a ball matched with the ball seat, whereinthe circulation hole communicating with the inside and the outer side is arranged on a wall of the casing, after the thrown ball is combined with the ball seat, the pressure fluid is pumped, under the action of the hydraulic force, the ball seat and the inner sleeve move downwards together to expose the circulation hole, the ball seat finishes contacting with the liquid, and chemical reaction occurs. The fracturing sliding sleeve 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 sliding sleeve and a fracturing pipe string containing the same. 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 frac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B34/14E21B17/00
CPCE21B17/00E21B34/14E21B43/26
Inventor 戴文潮朱和明薛占峰侯乃贺崔晓杰韩峰尹垒
Owner CHINA PETROLEUM & CHEM CORP
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