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A plug-in casing gas recovery device for anti-freeze blockage

A technology for recovering device and casing gas, which is applied to wellbore/well valve device, production fluid, wellbore/well components, etc. It can solve the problem of valve core freezing blockage, and achieve the solution of freezing blockage and complete recovery of casing. gas effect

Active Publication Date: 2017-12-01
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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  • A plug-in casing gas recovery device for anti-freeze blockage

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Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0020] A plug-in casing gas recovery device for anti-freeze blockage, comprising an oil pipe 3, a constant pressure release valve 2 and a pressure conductor 15, the lower end of the constant pressure release valve 2 is inserted into the oil pipe 3, and the upper end of the constant pressure release valve 2 is set There is a pressure regulating cap 4, the upper end of the pressure regul...

Embodiment 2

[0027] Based on 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 release valve 2 of this device is fixed on the pressure conductor 15 through the bolt 5, which ensures the pressure change sensed by the pressure conductor 15 and then adjusts the constant pressure release valve 2 to provide the required pressure value.

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

[0030] The valve support 9 is sealed and connected with the lower end of the air intake chamber 7 through the sealing gasket 8 to ensure the internal sealing of the air intake chamber 7 .

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

[0032] The spring...

Embodiment 3

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

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

[0039] The scale sleeve 6 is sleeved on the outside of the air intake chamber 7 through an O-ring.

[0040] The O-shaped sealing ring prevents the scale sleeve 6 set outside the air intake chamber 7 from falling off due to temperature changes, and ensures that the scale sleeve 6 and the air intake chamber 7 are hermetically connected.

[0041] The pressure regulating cap 4 of the constant pressure release valve 2 of the device is fixed on the pressure conducting body 15 through the bolt 5, the scale sleeve 6 is set on the outside of the air intake chamber 7 through the O-shaped sealing ring, and the upper end of the air intake chamber 7 is con...

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Abstract

The invention provides a plug-in type antifreeze blockage casing gas recovery device, which includes an oil pipe, a constant pressure air release valve and a pressure conductor. The lower end of the constant pressure air release valve is inserted into the oil pipe, and the upper end of the constant pressure air release valve is provided with a pressure regulator Cap, the upper end of the pressure regulating cap is fixedly connected with the upper end of the pressure conductor, the pressure conductor extends through the constant pressure release valve to the inside of the oil pipe, the lower end of the constant pressure release valve is sleeved with an inner pipe, and forms an air intake with the inner pipe chamber; the upper end of the air intake chamber is connected to the one-way valve through a screw thread, and the lower end of the inner pipe is provided with an exhaust hole, which is connected with the oil pipe; Working in the wellhead tubing of an oil well, the constant pressure release valve can be traced by the heat of crude oil on site, and the valve seat is installed above the pressure regulating piston in a suit, so that the constant pressure release valve can discharge condensed water while opening the exhaust, thereby completely solving the problem of gas Heat absorption during release and freezing and blocking in winter; at the same time, the check valve can prevent crude oil from flowing into the casing.

Description

technical field [0001] The invention relates to a plug-in casing gas recovery device for preventing freezing and blocking, and belongs to the technical field of oil recovery engineering. Background technique [0002] At present, the casing gas recovery process in domestic oilfields mainly adopts surface recovery technology, mainly gas collection and mixed transportation with wellhead constant pressure valves. The constant pressure valve absorbs heat when the gas is released, and condensed water is generated when the exhaust is opened, which is easy to accumulate and freeze in the gas path, causing the valve core to freeze and become unusable. Contents of the invention [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, so as to completely solve the problem of heat ab...

Claims

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Application Information

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Patent Type & Authority Patents(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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