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Plug-in anti-frozen-blocking casing gas recovery device

A recovery device and casing gas technology, applied in the direction of wellbore/well valve device, production fluid, wellbore/well parts, etc., can solve the problem of valve core freezing and blocking, and achieve the solution of freezing blocking and complete recovery of casing gas effect

Active Publication Date: 2016-01-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem of easy blockage of existing devices, the present invention provides a plug-in type anti-freezing casing gas recovery device. When the gas valve is opened to exhaust, the condensed water is discharged at the same time, thus completely solving the problem of heat absorption during gas release and freezing in winter; at the same time, the one-way valve can prevent crude oil from flowing into the casing

Method used

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  • Plug-in anti-frozen-blocking casing gas recovery device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In order to overcome the problem of easy clogging of existing devices, the present invention provides such as figure 1 Shown is a plug-in anti-freeze blocking casing gas recovery device. The device solves the problem of freezing blocking of the valve core and achieves the purpose of completely recovering casing gas. The constant pressure air release valve opens the exhaust and discharges the condensed water at the same time. So as to completely solve the problem of heat absorption and freezing blocking in winter when the gas is released; at the same time, the one-way valve can prevent the crude oil from flowing into the casing.

[0020] A plug-in antifreeze blocking casing gas recovery device, comprising an oil pipe 3, a constant pressure air release valve 2 and a pressure conductor 15, the lower end of the constant pressure air release valve 2 is inserted into the oil pipe 3, and the upper end of the constant pressure air release valve 2 is provided with There is a pre...

Embodiment 2

[0027] On the basis of Embodiment 1, in this embodiment, the pressure regulating cap 4 and the pressure conductor 15 are fixedly connected by bolts 5 .

[0028] The pressure regulating cap 4 of the constant pressure vent valve 2 of the device is fixed on the pressure conductor 15 by the bolts 5, which ensures that the pressure change value sensed by the pressure conductor 15 is adjusted and the constant pressure vent valve 2 is adjusted to provide the required pressure. value.

[0029] The lower end of the intake chamber 7 is sleeved on the valve holder 9 through a gasket 8 .

[0030] The valve holder 9 is sealedly connected with the lower end of the intake chamber 7 through the sealing gasket 8 to ensure that the interior of the intake chamber 7 is sealed.

[0031] The valve holder 9 is connected with the valve seat 10 through a screw thread. The screw connection ensures that the valve holder 9 will not slip off and is connected with the valve seat 10 as a whole.

[0032] ...

Embodiment 3

[0037] On the basis of Embodiment 1, in this embodiment, a scale sleeve 6 is provided at the outer upper end of the air inlet chamber 7 .

[0038] A scale sleeve 6 is arranged outside the air inlet chamber 7, so that the adjustment changes can be clearly and intuitively seen, and the scale sleeve 6 can accurately display the read data.

[0039] The scale sleeve 6 is sleeved outside the air inlet cavity 7 through an O-ring seal.

[0040] The O-ring seal prevents the scale sleeve 6 fitted outside the air inlet chamber 7 from falling off due to temperature changes, and ensures that the scale sleeve 6 is tightly connected with the air inlet chamber 7 .

[0041] The pressure regulating cap 4 of the constant pressure air release valve 2 of the device is fixed on the pressure conductor 15 through bolts 5, the scale sleeve 6 is sleeved outside the air inlet chamber 7 through an O-ring seal, and the upper end of the air inlet chamber 7 is connected by a screw thread. To the valve 1; t...

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Abstract

The invention provides a plug-in anti-frozen-blocking casing gas recovery device which comprises an oil pipe, a constant-pressure gas relief valve and a pressure conductor, wherein the lower end of the constant-pressure gas relief valve is inserted into the oil pipe; a pressure regulating cap is arranged at the upper end of the constant-pressure gas relief valve; the upper end of the pressure regulating cap is fixedly connected with the upper end of the pressure conductor; the pressure conductor penetrates through the constant-pressure gas relief valve and extends into the oil pipe; the interior at the lower end of the constant-pressure gas relief valve is sleeved by an inner pipe to form an gas inlet cavity; the upper end of the gas inlet cavity is connected with a one-way valve through a screw thread; a gas vent is formed in the lower end of the inner pipe, and communicated with the oil pipe. The device integrates the constant-pressure gas relief valve and the one-way valve, and is mounted in a wellhead oil pipe of an oil well; the constant-pressure gas relief valve can be subjected to heat tracing by virtue of crude oil heat on site, and condensation water can be discharged when the constant-pressure gas relief valve is opened for gas discharge through adoption of such a sleeving manner that the valve seat is mounted above a relief piston, so that the problems of heat absorption during gas relief and frozen-blocking in winter can be completely solved; meanwhile, the one-way valve can prevent crude oil from flowing into a casing pipe.

Description

technical field [0001] The invention relates to a plug-in type antifreeze blocking casing gas recovery device, which belongs to the technical field of oil production engineering. Background technique [0002] At present, the domestic oilfield casing gas recovery process mainly adopts the ground recovery technology, mainly the wellhead constant pressure valve gas collection and mixed transportation. The constant pressure valve absorbs heat when the gas is released, and when the exhaust is opened, condensed water is generated, which is easy to accumulate in the gas path and freeze and block, causing the valve core to freeze and block and cannot be used. SUMMARY OF THE INVENTION [0003] In order to overcome the problem of easy blockage of the existing device, the present invention provides a plug-in type antifreeze blocking casing gas recovery device. When the gas valve is opened and exhausted, the condensed water is discharged at the same time, thus completely solving the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00E21B34/02
Inventor 王曼王林平晏耿成郑刚覃川张倩魏立军杨会丰刘一山冯建设程颢徐自强
Owner PETROCHINA CO LTD
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