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Non-releasing valve replacing device for casing valve

A technology of casing valve and valve device, which is applied in wellbore/well components, earthwork drilling and production, etc. It can solve the problems of injury and safety accidents, and achieve the effects of improving working time, protecting oil and gas resources, and avoiding production reduction

Active Publication Date: 2014-07-09
TOP WELL PETROLEUM TECH COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1) Replace the plug by throwing it away after it is seated. Once the plug fails to work, there will be a major safety accident that will fly out and hurt people

Method used

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  • Non-releasing valve replacing device for casing valve
  • Non-releasing valve replacing device for casing valve
  • Non-releasing valve replacing device for casing valve

Examples

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Embodiment Construction

[0043] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0044] Such as figure 1 As shown, an embodiment of the present invention provides a valve replacement device for casing valves without dropping hands, including: a plug 100; a hydraulic feeding mechanism; a mechanical locking mechanism; a hydraulic safety mechanism; And, a plug fixing device;

[0045] Wherein, the plug 100 can pass through the gate valve 30 to be replaced to be placed at a predetermined position to block the oil pipe head;

[0046] The hydraulic feeding mechanism can send the obturator 100 to the predetermined position;

[0047] The mechanical locking mechanism can press the obt...

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PUM

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Abstract

The invention provides a non-releasing valve replacing device for a casing valve. The non-releasing valve replacing device for the casing valve comprises a packer, a hydraulic feeding mechanism, a mechanical locking mechanism, a hydraulic valve moving mechanism and a packer fixing device, wherein the hydraulic feeding mechanism comprises a feeding rod detachably connected with the packer and a feeding hydraulic cylinder connected with the feeding rod and used for driving the feeding rod to perform reciprocating motion in the axial direction of the feeding rod. The mechanical locking mechanism comprises a locking support fixedly connected with a tubing head, a locking screw connected onto the locking support and consistent to the feeding rod in axial direction and a locking press plate detachably connected with the locking screw, wherein the locking press plate is connected with the feeding rod. The hydraulic valve moving mechanism comprises a valve moving support for being fixedly connected with a gate valve and driving the gate valve to perform reciprocating motion in the axial direction of a feeding transmission rod and a valve moving hydraulic cylinder for driving the valve moving support to perform reciprocating motion in the axial direction of the feeding rod, wherein the valve moving hydraulic cylinder is fixedly connected with the valve moving support. By using the non-releasing valve replacing device for the casing valve, a casing master control valve of a Christmas tree is replaced under the non-releasing condition, and safe and reliable valve replacing process is ensured.

Description

technical field [0001] The invention relates to the field of oil and gas exploitation equipment, in particular to a valve changing device for casing valves without dropping hands. Background technique [0002] The wellhead devices of the gas trees in various oilfields across the country, after decades of exploitation, the wellhead devices of the gas production wells, due to the technical conditions at that time, the level of system maintenance, erosion, corrosion or aging of valve seals, etc., caused the main control parts (gate valves) ) with varying degrees of leakage. [0003] Wellhead (gate valve) leakage is very detrimental to the safe production of gas wells, and natural gas contains a lot of harmful gases (such as H2S and other harmful gases), these harmful gases not only seriously threaten people's health, but also cause environmental pollution. Metallic equipment, tools and utensils will also cause severe corrosion damage. Once the wellhead is out of control, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B23/04
Inventor 刘彬韦宗林苏武兴
Owner TOP WELL PETROLEUM TECH COMPANY
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