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A kind of mechanical or hydraulic trigger infinite stage segmented transformation sliding sleeve device

A segmented transformation and infinite stage technology, applied in the direction of wellbore/well valve device, production fluid, wellbore/well components, etc., can solve the problem of increased fracturing friction, limited number of stages, and increased risk to reduce the frictional resistance of fracturing

Active Publication Date: 2017-11-10
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

The current technology has the following deficiencies: due to the need to invest in different diameter balls and ball seats to cooperate to realize the opening of the sliding sleeve, the number of stages is limited; the full diameter of the pipe string cannot be realized, which increases the fracturing friction; subsequent workover Inevitably, it is necessary to drill the ball seat of the sliding sleeve, and the complicated construction increases the risk

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  • A kind of mechanical or hydraulic trigger infinite stage segmented transformation sliding sleeve device
  • A kind of mechanical or hydraulic trigger infinite stage segmented transformation sliding sleeve device

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Embodiment Construction

[0023] In order to make the purpose of the invention, technical solutions and beneficial effects of the present invention clearer, the embodiments of the present invention will be described below in conjunction with the accompanying drawings. The features in can be combined arbitrarily with each other.

[0024] The core of the present invention is to transform the sliding sleeve device in the fracturing well, by setting a scalable elastic sleeve and a deformable variable-diameter ball seat and improving the surrounding parts of the elastic sleeve and the variable-diameter ball seat, thereby The use of low-density fracturing balls of the same size can open several stages of sliding sleeves and realize full bore, so that the number of fracturing stages can be increased infinitely, and the refined transformation of the reservoir can be realized.

[0025] Specific examples see figure 1 ,Such as figure 1 As shown, a mechanical or hydraulically triggered infinitely staged segmente...

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Abstract

An infinite-level sectional reconstruction sliding sleeve device triggered by machinery or the hydraulic pressure comprises a cylinder body formed by an upper joint, a shell and a lower joint which are connected in sequence, an elastic sleeve, an inner sliding sleeve, a variable-diameter ball seat and a ball seat deformation mechanism, wherein the elastic sleeve is located in the upper joint and can selectively pass through or support the fracture ball through scaling, the inner sliding sleeve is located at the bottom of the elastic sleeve, the variable-diameter ball seat is located at the bottom of the inner sliding sleeve and supports or releases the fracture ball through elastic claws, and the ball seat deformation mechanism is connected with the variable-diameter ball seat and drives the variable-diameter ball seat to realize mutual transformation between an open-type ball seat and a closed-type ball seat. Through the arrangement of the elastic sleeve and the variable-diameter ball seat and the improvement of the surrounding components, a multi-level sliding sleeve can be opened by adoption of a low-density fracture ball with the same dimension in a full-pore mode, the fine reconstruction of the reservoir can be realized, and a barrier-free passage can be provided for later workover treatment.

Description

technical field [0001] The invention belongs to the field of staged fracturing construction tools for horizontal wells, in particular to a sliding sleeve device for staged fracturing construction of horizontal wells. Background technique [0002] Horizontal well staged fracturing technology is an engineering technology developed along with the development of unconventional oil and gas such as shale gas, tight gas, and tight oil. At present, the most commonly used technology is open hole horizontal well packer + sliding sleeve technology, which uses balls of different diameters to open the fracturing sliding sleeve for operation. The current technology has the following deficiencies: due to the need to invest in different diameter balls and ball seats to cooperate to realize the opening of the sliding sleeve, the number of stages is limited; the full diameter of the pipe string cannot be realized, which increases the fracturing friction; subsequent workover It is inevitable ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26
CPCE21B34/06E21B43/26E21B2200/04
Inventor 付强董社霞袁东平王杏尊蔡万伟程文佳董军
Owner CHINA NAT OFFSHORE OIL CORP
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