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Dual-channel counter-directional joint control single-flow valve

A dual-channel, single-flow valve technology, used in wellbore/well valve devices, wellbore/well components, earth-moving drilling and production, etc., can solve problems such as damage and fracture of double-layer coiled tubing.

Active Publication Date: 2017-05-10
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the double-layer coiled tubing is operated with tools, it will encounter problems such as damage and fracture of the double-layer coiled tubing body caused by sudden accidents. blowout accident

Method used

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  • Dual-channel counter-directional joint control single-flow valve
  • Dual-channel counter-directional joint control single-flow valve
  • Dual-channel counter-directional joint control single-flow valve

Examples

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specific Embodiment

[0044] Such as figure 1 As shown in Figure 4, the left valve body 2 is a cylindrical structure, the inner wall at one end is finish-turned to connect the double-layer female ports of the inner and outer coiled tubing bodies, and the outer wall at the other end is finish-turned to connect to the right valve body 14 pins. A cylindrical through hole with a diameter smaller than the threaded thread of the inner layer is drilled and milled at the center of the left valve body 2, namely the first left through hole 41, which is used for the injection and discharge of the liquid in the inner coiled tubing. Three oblong cross-section through holes with an angle of 120° are respectively drilled and milled at a certain distance from the outer edge of the first left through hole 41, i.e. the second left through hole 42 (wherein the number in this embodiment is Three, or two or four, etc.), used for injection and discharge of liquid in the outer coiled tubing.

[0045] Such as figure 1 ...

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Abstract

The invention discloses a dual-channel different-direction joint-control check valve which comprises a left valve body, a right valve body, an inner piston, an outer piston, an inner reset spring and an outer reset spring. A gap with the preset size is reserved between the hole wall of a first right through hole and the hole wall of a first left through hole, a plurality of inner grooves are evenly circumferentially arranged in the outer wall of the inner piston and correspond to the gap, a plurality of outer grooves are arranged in the inner wall of the outer piston in a manner of being in one-to-one correspondence to the inner grooves, the bottom of each outer groove is provided with one pin shaft reset spring, one pin shaft is jacked into the inner groove through the pin shaft reset spring, the hole wall of the first right through hole is provided with blind holes corresponding to the pins shafts, each blind hole is provided with one slider and a slider reset spring which press the slider onto the pin shaft, and the inner piston drives the outer piston to move synchronously through the pin shafts when moving rightwards under the pressure of the left side. By the arrangement, blowout accident can be effectively prevented when accident happens.

Description

technical field [0001] The invention relates to the field of oil drilling equipment, in particular to a dual-channel different-direction joint-control single-flow valve. Background technique [0002] When the double-layer coiled tubing is operated with tools, it will encounter problems such as damage and fracture of the double-layer coiled tubing body caused by sudden accidents. gushes out and causes a blowout accident. Therefore, there is a need for a dual-channel different-direction joint-controlled single-flow valve. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a dual-channel different-direction joint control single-flow channel that can effectively seal the channels of the inner and outer coiled tubing when an accident occurs, thereby preventing the well fluid from returning and preventing blowout accidents. valve. [0004] Therefore, technical scheme of the present invention is as follows: [0005] A ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B34/00
Inventor 任勇强张毅徐昊洋于丽敏刘玉海杨小涛提云王燕声刘雨薇徐克彬欧明军
Owner BC P INC CHINA NAT PETROLEUM CORP
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