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A coupling seated underground production proration device

A technology of sleeves and connecting sleeves, which is applied in the direction of wellbore/well components, production fluid, earthwork drilling and production, etc. It can solve problems such as permanent deformation, failure of downhole production allocation device to be released, and fishing failure.

Active Publication Date: 2018-03-09
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When pulling up the tubing from a failed well, it was found that the slip teeth of the downhole proration device bit into the tubing too deeply, and the "v" rubber sleeve was permanently deformed due to long-term use, so the downhole proration device could not be released during salvage. Salvage failed

Method used

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  • A coupling seated underground production proration device
  • A coupling seated underground production proration device
  • A coupling seated underground production proration device

Examples

Experimental program
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Effect test

Embodiment Construction

[0025] This embodiment provides a collar seated downhole production proration device, such as figure 1 As shown, it consists of a fixed mechanism and a distribution mechanism, among which,

[0026] The fixing mechanism includes feeding head 1, connecting pipe 2, fixing pipe 3, setting pin 4, snap ring 5, core rod 6, sliding cylinder 7, clamping block 8, throwing pipe 9, salvage neck 10, and throwing scissors 11 , semi-circular ring 12, positioning ring 13, lock cap 14, pressure sleeve 15, seating claw sleeve 16, seating claw 17, locking nail 18, unsealing sleeve 19, unsealing pin 20, unsealing shaft 21, connecting sleeve 22, upper Central tube 23, unsealing claw 24;

[0027] The top outer wall of the expanded diameter end of the core rod 6 is fitted with a fixed tube 3, which is locked by a setting pin 4, followed by a clasp ring 5, a sliding tube 7, and a salvage neck 10; Threaded connection, the snap ring 5 is limited by the boss on the inner wall of the fixed pipe 3 and t...

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Abstract

The invention belongs to the technical field of oilfield gas production and particularly relates to a special downhole production allocation device used in the natural gas exploitation process, in particular to a coupling free stand type downhole production allocation device. Before installation, a production allocation nozzle can be replaced at any time according to gas well production allocation, and production allocation is convenient. When the device is installed, by means of inertia force, released shear pins can be easily cut off, and setting of the device is easy. After installation, a sealing cylinder expands for the second time by means of pressure of a gas well shaft, and sealing of the device is reliable. During disassembly, upward shocking is conducted so that a fishing neck can be upwards disengaged from a sitting pawl, meanwhile deblocking pins are sheared, deformation of the sealing cylinder restores, the production allocation device is easily disassembled, and the production allocation device is suitable for downhole production allocation of compact gas field development.

Description

technical field [0001] The invention belongs to the technical field of oil field gas production, and in particular relates to a special downhole production proration device in the process of natural gas production, in particular to a collar seated downhole production proration device. Background technique [0002] One of the key technologies for the economical and effective development of the Sulige tight gas field is the application of downhole proration technology, which prevents the formation of natural gas hydrates, reduces the pressure of the surface gathering and transportation system, simplifies and optimizes the surface process, and reduces the safety hazards during the operation of surface pipelines. Environmental risk. [0003] With the development of gas fields, the pressure of single wells gradually decreases, and gas wells need to be decompressed or pressurized for production, and some liquid-loaded gas wells need to be produced with auxiliary liquid drainage me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00E21B43/12E21B33/127
CPCE21B33/127E21B43/006E21B43/12
Inventor 卫亚明杨旭东肖述琴刘双全付钢旦程小莉陈勇韩强辉
Owner PETROCHINA CO LTD
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