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Counting type infinite class multi cluster full path sectional fracturing slip sleeve

A segmented fracturing sliding sleeve and infinite-stage technology, which is applied in wellbore/well components, production fluid, sealing/isolation, etc., can solve the problems that multi-cluster, infinite-stage and full-bore fracturing cannot be realized at the same time , to achieve high reliability, flexible configuration and high efficiency

Inactive Publication Date: 2017-05-10
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the existing multi-cluster segmented fracturing sleeve cannot realize multi-cluster, infinite stage and full-diameter fracturing at the same time without running into oil tubing or coiled tubing, the present invention provides a counting infinite Multi-stage multi-cluster full bore staged fracturing sleeve

Method used

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  • Counting type infinite class multi cluster full path sectional fracturing slip sleeve
  • Counting type infinite class multi cluster full path sectional fracturing slip sleeve
  • Counting type infinite class multi cluster full path sectional fracturing slip sleeve

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Embodiment Construction

[0024] figure 1 It is a schematic structural diagram of the counting infinite-stage multi-cluster full-diameter segmented fracturing sleeve, which consists of an upper joint (1), an upper jaw (2), an outer sliding sleeve (3), a jaw connector (4), and a lower jaw Claw (5), switch (6), spring (7), resettable ball seat (9), piston (10), support seat (11), lower joint (12) is formed. The upper joint (1) is connected with the outer sliding sleeve (3) through threads. There are grooves (14) on the inner wall of the upper joint (1) and the outer sliding sleeve (3). n The number of grooves (14) of a fracturing sliding sleeve is n +2 ( n is a positive integer). The inner sliding sleeve is composed of an upper jaw (2), a jaw connector (4) and a lower jaw (5). The upper jaw (2) and the lower jaw (5) have the same structure and are made of high elastic material. The lower end of the upper claw (2) and the upper end of the lower claw (5) have claw heads (a), and the claw heads (a) can...

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Abstract

The invention relates to a counting type infinite class multi cluster full path sectional fracturing slip sleeve. The slip sleeve applies the manner of casting fracturing balls for opening the slip sleeve. The quantity of the casting balls is same with the quantity of fracturing sections. All the balls have the same sizes. The paw heads of an upper buckling paw and a lower buckling paw converge in the radial direction to seal the fracturing balls, or reinstate the original condition through the action of self-elasticity to release the fracturing ball. Grooves are formed in the inner walls of an upper connecting head and an outer slip sleeve. The inner slip sleeve coordinates with the grooves to achieve the function of counting. When all the fracturing of all layers and sections are completed.The pressure is released at the pithead. Under the function of a spring, a ball seat can be restored. The fracturing balls are back-discharged or made to fall to the well bottom. The whole pipe column can achieve full bore. In the same stage, multiple upper connecting heads, inner slip sleeves, switches and outer slip sleeves can achieve multi-cluster fracturing by the serial connection of multiple cluster connectors. In the operation without the entry of oil pipe, or in the operation with continous oil pipe, the counting type infinite class multi cluster full path sectional fracturing slip sleeve can meet the fracturing requirement of the multi-cluster, infinite class and full bore.

Description

technical field [0001] The invention relates to a fracturing tool in the field of oil extraction tools, in particular to a counting infinite-stage multi-cluster full-diameter staged fracturing sliding sleeve for staged fracturing of horizontal wells. Background technique [0002] In recent years, 70% of the new domestic crude oil reserves belong to low-permeability reservoirs, and the mining methods and oil well production dynamics show particularity. To realize the effective production of reserves and greatly increase the production of single well is an urgent problem to be solved in the development of low-permeability oilfields. Multi-cluster staged fracturing tools and technology can be applied to the stimulation of unconventional oil and gas reservoirs such as low permeability oil and gas reservoirs, thin oil reservoirs, shale gas and coalbed methane, and have broad application prospects. This technology not only has a large fracturing scale and a large construction dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B34/06
Inventor 唐明赵传伟
Owner 中石化石油工程技术服务有限公司
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