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Kelly non-differential pressure switchable plug valve

A kelly and plug valve technology, applied in the field of oil reservoirs, can solve the problems of personal safety hazards, high blowout pressure, inability to open, etc., and achieve the effects of safe use, reduced torque, and easy switch operation.

Active Publication Date: 2021-06-18
牡丹江石油工具有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the kelly plug valves used at home and abroad cannot be closed or opened even after being closed due to the high blowout pressure during blowout and well kick.
If it needs to be opened, there are two ways: one is to use the extension sleeve to increase the length of the wrench to increase the force arm; the other is to apply pressure on the upper end to form a certain pressure difference, but both of these two opening methods have hidden dangers to personal safety.

Method used

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  • Kelly non-differential pressure switchable plug valve

Examples

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Comparison scheme
Effect test

Embodiment 1

[0045] figure 1 It is a structural schematic diagram of an embodiment of a kelly non-pressure differential switchable plug valve of the present invention.

[0046] Such as figure 1 As shown, the kelly non-differential pressure switchable plug valve includes:

[0047] The main body 16 has a through hole in the axial direction of the main body 16;

[0048] A lower ball seat 11 and an upper ball seat 13, the lower ball seat 11 and the upper ball seat 13 are arranged in the through hole, and there is a gap between the lower ball seat 11 and the upper ball seat 13;

[0049] Ball valve 12 and operation key 5, a second through hole is opened in the radial direction of the body 16, and the second through hole is connected to the gap, the ball valve 12 is arranged in the gap, and the operation key 5 is arranged in the second through hole and connected to one end of the ball valve 12 .

[0050] Wherein, the inner wall of the body 16 is provided with a lower ball seat accommodating h...

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Abstract

The embodiment of the present invention discloses a kelly non-pressure switchable cock valve, the kelly non-pressure switchable cock valve comprises: a main body, a through hole is opened in the axial direction of the main body; a lower ball seat and an upper The ball seat, the lower ball seat and the upper ball seat are arranged in the through hole, and there is a gap between the lower ball seat and the upper ball seat; the ball valve and the operation key, the radial direction of the body A second through hole is opened in the direction, the second through hole communicates with the gap, the ball valve is set in the gap, the operation key is set in the second through hole, and is connected to the ball valve one end. The kelly non-pressure differential switchable plug valve is safer to use and more convenient to operate.

Description

technical field [0001] The invention relates to the field of oil reservoirs, in particular to a kelly non-pressure differential switchable plug valve. Background technique [0002] Kelly plug valves are used as manual control valves in oil and gas drilling drill string circulation systems, and are one of the effective tools for blowout prevention in pipe strings. Use a special wrench to turn the operation key 90 degrees according to the instruction to realize the switch. At present, the kelly plug valves used at home and abroad cannot be closed or opened even after being closed due to the high blowout pressure during blowout and well kick. If it needs to be opened, there are two ways: one is to increase the length of the wrench with an extension sleeve to increase the moment arm; the other is to apply pressure on the upper end to form a certain pressure difference, but these two opening methods all have hidden dangers to personal safety. [0003] Therefore, it is necessary...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B34/08
CPCE21B34/08E21B2200/04
Inventor 韦淑兰金成武徐松伟
Owner 牡丹江石油工具有限责任公司