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Ground controllable type underground switch valve

A controllable, on-off valve technology, which is applied to wellbore/well valve devices, wellbore/well parts, earthwork drilling and production, etc., can solve the problems of repeated switching, difficult fishing, poor stability, etc., and achieve the construction process Safe and efficient, easy to control the switch, and strong stability

Inactive Publication Date: 2015-09-16
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the poor stability of the Schlumberger clock-type downhole switch tool in the prior art, the high failure rate in the downhole, and the inability to switch repeatedly. The gap between the 3.5-inch tubing (inner diameter 2.922 inches) and the tubing wall is large, and sediments are easy to accumulate and difficult to salvage, which poses a greater risk to construction

Method used

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  • Ground controllable type underground switch valve
  • Ground controllable type underground switch valve
  • Ground controllable type underground switch valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 A ground-controllable downhole switch valve shown includes an outer cylinder 1, a connecting body 7, a sealing assembly 8, a lock block seat 9, a lock block 10, an inner cylinder 11, a sleeve 14 and an upper joint 15. The upper end of the outer cylinder 1 is threadedly connected to the lower end of the connecting body 7, the connecting body 7 is provided with a sealing assembly 8, the upper end of the connecting body 7 is threadedly connected to the lower end of the locking block seat 9, and the locking block seat 9 is sleeved on the inner cylinder 11 and is slidably connected with the inner tube 11, and the middle part of the lock block seat 9 is inlaid with a lock block 10 (such as image 3 As shown), the lock block 10 can be extended and retracted. The upper end of the lock block seat 9 is threaded with the sleeve 14; the inner cylinder 11 is threaded with the upper joint 15; the upper end of the lock block seat 9 is threaded with a locking ring 12 ...

Embodiment 2

[0035] On the basis of Example 1, such asfigure 1 and figure 2 As shown, the valve body includes a piston cylinder 3, a valve core 4 and a bottom plug 2; the middle part of the piston cylinder 3 is threadedly connected with the outer cylinder 1 and is provided with an O-ring, and the side wall of the piston cylinder 3 is provided with an upper The liquid passage hole 18 and the lower liquid passage hole 20; the piston cylinder 3 is provided with a fluid channel 17 between its outer surface and the inner surface of the outer cylinder 1 except for the threaded connection part in the middle; the lower end of the valve core 4 is provided with Piston one 16 which is slidingly connected with the piston cylinder 3, and the middle part of the valve core 4 is provided with a piston two 17 which is slidingly connected with the piston cylinder 3; when the valve body is in a closed state, the piston one 16 is in contact with the bottom plug 2 at the bottom of the piston cylinder 3 , and ...

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Abstract

The invention provides a ground controllable type underground switch valve. The valve comprises an outer cylinder, a connecting body, a sealing assembly, a locking block seat, a locking block, an inner sleeve, a sleeve and an upper joint. The upper end of the outer cylinder is in threaded connection with the lower end of the connecting body, and the connecting body is sleeved with the sealing assembly; the upper end of the connecting body is in threaded connection with the lower end of the locking block seat, the inner cylinder is sleeved with the locking block seat, and the locking block seat is in sliding connection with the inner cylinder; the locking block is embedded in the middle portion of the locking block seat, and the upper end of the locking block seat is in threaded connection with the sleeve. The inner cylinder is in threaded connection with the upper joint, and a locking ring for preventing the inner cylinder from moving upwards is in threaded connection with the upper end of the locking block seat; slope steps which are matched are arranged between the locking block and the inner cylinder, and a valve body is arranged in the outer cylinder; and a fluid channel communicated with a liquid inlet in the lower end of the outer cylinder is arranged between the valve body and the outer cylinder, and when the valve body is closed or opened, the fluid channel is cut off or communicated. The ground controllable type underground switch valve is high in safety, high in stability and convenient to fish, the valve can be easily controlled to be opened and closed, and repeated opening and closing can be achieved.

Description

technical field [0001] The invention belongs to the technical field of well completion steel wire operations in oil and gas fields, and in particular relates to a ground controllable test downhole switch valve. Background technique [0002] In the field of completion steel wire operation, when there is tubing to complete the well, the circulating sliding sleeve is usually used to open and close the well downhole, and the circulation channel is established and closed; when the well is completed without tubing, it is necessary to use the preset (steel wire operation) downhole switch tool To realize downhole opening and closing. [0003] The downhole switch valve is also the downhole safety valve. The downhole safety valve is a downhole tool to prevent blowout and ensure production safety. In the oil extraction industry, when performing downhole operations, the flow rate of hydrocarbon fluids often increases due to failure of extraction equipment and other reasons. At this tim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B34/14E21B34/16
Inventor 陈磊龙庆祝心发时峥李学林都清旺王增军
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO