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A six-opening switch sliding sleeve

A sliding sleeve and switch technology, applied in the direction of production fluid, wellbore/well components, earthwork drilling and production, etc., can solve the problems of easy formation of gas cones, adapt to environmental restrictions, and cannot fully meet the requirements of downhole operations, and achieve simple structure, Design novel effects

Active Publication Date: 2016-09-28
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conventional sliding sleeve is easy to form gas cones after opening the channel, and the adaptability to the environment is limited, and it cannot fully meet the requirements of downhole operations; Sliding sleeves for operations, selective mining, or isolation and water blocking operations for some layers

Method used

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  • A six-opening switch sliding sleeve
  • A six-opening switch sliding sleeve
  • A six-opening switch sliding sleeve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The six-opening switch sliding sleeve includes a central tube 1 , an upper joint 2 , a lower joint 3 , a sliding sleeve body 4 and a connecting short 5 . One end of the center pipe 1 is threadedly provided with an upper joint 2 , and a sliding sleeve body 4 is movable in the center pipe 1 . The sliding sleeve body 4 is cylindrical, and the circumference of one end of the sliding sleeve body 4 is evenly distributed with fracturing channel grooves 6, and the circumference of the other end of the sliding sleeve body 4 is evenly distributed with claw installation grooves 7, and the claw installation grooves 7 are installed There is claw 8, and the effect of claw 8 is to make sliding sleeve body 4 can only move under the effect of switch tool by lower joint 3, and can not slide easily under the effect of non-switch tool. A pin track groove 9 is provided on the circumference of the outer surface of the sliding sleeve body 4 on one side of the claw mounting groove 7 .

[0019...

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Abstract

The invention relates to a six-opening switch sliding bush and belongs to the technical field of petroleum underground tools. The switch sliding bush comprises a central pipe, an upper joint, a lower joint, a sliding bush body and a connecting nipple, wherein the upper joint is installed at one end of the central pipe through threads, the sliding bush body is installed in the central pipe in a sleeved manner, the lower joint sleeves the sliding bush body, the connecting nipple is installed on the sliding bush body between the lower joint and the central pipe, and the connecting nipple is respectively connected with the central pipe and the lower joint through threads. The switch sliding bush has the advantages that the structure is simple, the design is novel, and the problems that gas coning is easily formed after the existing common sliding bush is used for opening a passage, the environmental adaptability is limited to a certain extent and the underground operation requirement cannot be satisfied are solved; the six-opening switch sliding bush is particularly suitable for oil and gas well fracturing yield increasing operation, selective exploitation and packing and water plugging operation.

Description

technical field [0001] The invention relates to a six-opening switch sliding sleeve, which belongs to the technical field of petroleum downhole tools. Background technique [0002] In the cementing process, the switch sliding sleeve is directly connected with the casing through the casing buckle and arranged in each production layer. In the later stage, the sliding sleeve is opened by the switch tool for fracturing and stimulation operations, or the sliding sleeve is closed for selective mining, or for sealing and water blocking operations for some layers. However, the conventional sliding sleeve is easy to form gas cones after opening the channel, and the adaptability to the environment is limited, and it cannot fully meet the requirements of downhole operations; Sliding sleeves for operations, selective mining, or isolation and water blocking operations for some layers. Contents of the invention [0003] The object of the present invention is to provide a six-opening s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B34/14E21B43/26E21B43/14E21B33/13
CPCE21B33/13E21B34/14E21B43/14E21B43/26
Inventor 管锋苗芷芃周传喜徐健付寅
Owner YANGTZE UNIVERSITY
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