A hydraulic positioning tool used in fracturing and filling sand control operations

A technology for hydraulic positioning and operation, applied in wellbore/well components, earth-moving drilling, etc., can solve the problems of inability to reset, easy opening of pipe string positioning tools, etc., to achieve stable and reliable operation, reduce the risk of early opening, Ensure the effect of pressure transmission

Active Publication Date: 2019-08-20
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problem that the pipe string positioning tool is easily opened by mistake and cannot be reset during the fracturing and filling process, and provides a hydraulic positioning tool used in fracturing and filling sand control operations. , through the contact of the locking sleeve and the sealing cylinder to generate a load display, and position the pipe string; after the work is completed, lift the service pipe string, unlock the locking sleeve and the sealing cylinder, and return to the initial state of the tool; the tool can realize repeated work

Method used

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  • A hydraulic positioning tool used in fracturing and filling sand control operations
  • A hydraulic positioning tool used in fracturing and filling sand control operations
  • A hydraulic positioning tool used in fracturing and filling sand control operations

Examples

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Embodiment Construction

[0023] In order to further understand the content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0024] like figure 1 As shown, this embodiment provides a hydraulic positioning tool used in fracturing and filling sand control operations to position the position of the pipe string, including a central pipe 1, a locking sleeve 2, an elastic claw 3, a stopper 4, and a lock nut 5. Lower joint 6, spring 7, first sealing ring 8, second sealing ring 9, third sealing ring 10, positioning screw 11, fixing pin 12.

[0025] like figure 2 As shown, the central pipe 1 is provided with a circular groove 101 in the middle, and the circular groove 101 is used to accommodate the internal support block 301 of the elastic claw 3 before positioning and after reset. The outer rotary surface of the lower part of the central tube 1 is designed with a reduced diameter...

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Abstract

The invention belongs to the technical field of petroleum and natural gas completion, and discloses a hydraulic positioning tool applied to fracturing filling sand prevention operation. The hydraulicpositioning tool comprises a central pipe, a locking sleeve, an elastic claw, a stopping block, a locking nut, a lower joint, a spring, a first sealing ring, a second sealing ring, a third sealing ring, a positioning screw and a fixed pin screw. When a service tubular column is placed down, the tubular column is positioned through load display generated by contact of the locking sleeve and a sealing cylinder. After the work is completed, the service tubular column is lifted up, unlocking is conducted through the locking sleeve and the sealing cylinder, an original state of the tool is recovered, and the tool can achieve repeated working.

Description

technical field [0001] The invention belongs to the technical field of oil and natural gas well completion, and in particular relates to a tool used in fracturing filling and sand control operations to position a pipe string. Background technique [0002] Fracturing packing technology is a new technology developed in recent years, and it is a new well completion method; its basic principle is: replace conventional gravel packing sand control operation with fracturing packing technology, combine fracture end screenout fracturing with gravel packing sand control technology The combination of the two is used in loose or poorly cemented formations to further improve the effect of sand control and achieve the goal of increasing production. In the process of multi-layer fracturing and filling, the positioning of the fracturing and sand control string is particularly important. If the positioning cannot be performed smoothly, the entire operation process will be affected and the fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B23/04
Inventor 严孟凯包陈义张少朋闫绅李跃谦张斌李宁魏爱栓
Owner CHINA NAT OFFSHORE OIL CORP
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