A pressure-controlled open fracturing sleeve
A technology for fracturing sliding sleeves and extensions, which is applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc. It can solve the problems of high investment cost and complicated construction, and achieve efficiency improvement, construction volume saving and cost saving Effect
Active Publication Date: 2016-11-30
ENTI XIAN OIL & GAS TECH CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to overcome the problems of complex construction and high investment cost during the fracturing of the lower part of the casing in the process of layered fracturing of the cementing sleeve
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[0018] In the fracturing operation using cemented sliding sleeves, a high-pressure dead zone is formed in the lower part of the casing after cementing, and the lower layer cannot be directly fractured, so a separate perforation string is required, and the lower layer is drilled after perforation. For fracturing, after the fracturing is completed, the sliding sleeve of the upper layer to be fractured is opened by throwing a ball to perform fracturing on the upper layer. The construction is more complicated and the investment cost is high. Fracturing slides.
[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0020] A pressure-controlled open fracturing sleeve, such as figure 1 As shown, it includes an upper joint and a lower joint. The upper joint includes an upper joint end 1 and an upper joint extension 2 connected to the upper joint end 1 and extending downward in the axial direction. The joint includes ...
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The invention belongs to the technical field of oil field oil well fracturing, and particularly relates to a pressure-controlled opening type fracturing sliding sleeve. The pressure-controlled opening type fracturing sliding sleeve comprises an upper joint and a lower joint, wherein the upper joint comprises an upper joint end part and an upper joint stretching part, and the lower joint comprises a lower joint end part and a lower joint stretching part; a cavity is defined by the upper joint end part, the upper joint stretching part, the lower joint end part and the lower joint stretching part, and a piston which sleeves outside the lower joint stretching part is arranged in the cavity; a first through-flow hole is formed in the lower joint stretching part along the radial direction of the lower joint stretching part, a second through-flow hole is formed in the upper joint stretching part along the radial direction of the upper joint stretching part, the upper joint stretching part is provided with a shear pin, and the shear pin penetrates through the upper joint stretching part and is fixedly connected with the piston. According to the pressure-controlled opening type fracturing sliding sleeve disclosed by the invention, the problems of more complex construction and high input cost when the lower part of a sleeve is fractured during a separate-layer fracturing construction process of a well cementation sliding sleeve are solved, the labor cost and the input cost for construction are reduced, and the separate-layer fracturing construction of the well cementation sliding sleeve is more convenient and effective.
Description
technical field [0001] The invention belongs to the technical field of oil well fracturing in oil fields, and relates to a supporting tool in a cementing sliding sleeve and a fracturing well completion string, in particular to a pressure-controlling open type fracturing sliding sleeve. Background technique [0002] The fracturing process is the main means to increase the production capacity of oil wells. Generally, fracturing construction is carried out before the oil wells are put into production. Through fracturing, the conductivity of the formation can be improved, thereby increasing the production of oil wells. [0003] Choose different completion methods according to the geological characteristics of the oil well. At present, there are open-hole pipe outer sealing layer fracturing, cementing sliding sleeve layering fracturing, fast drilling plug layering fracturing, casing layering fracturing and casing mixing Fracturing well completion, etc. [0004] In the layered fr...
Claims
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IPC IPC(8): E21B43/26
Inventor 张亚杰李颖李见
Owner ENTI XIAN OIL & GAS TECH CO LTD