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Wellhead discharge device and exhaust method of SAGD production well

A technology for discharge devices and production wells, which is applied in wellbore/well valve devices, wellbore/well components, drilling equipment, etc., can solve the problems of polluting the environment and easy poisoning of operators, and achieves the prevention of environmental pollution and easy solutions. Poisoning and ensuring the effect of normal production and operation

Active Publication Date: 2017-06-13
PETROCHINA CO LTD
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Problems solved by technology

[0006] The main purpose of the present invention is to provide a kind of well head discharge device of SAGD production well, exhaust method and SAGD double-horizontal well, to solve the SAGD production well degassing device in the prior art when the operator is easily poisoned during the degassing operation, and The problem of environmental pollution caused by deflation operation

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  • Wellhead discharge device and exhaust method of SAGD production well
  • Wellhead discharge device and exhaust method of SAGD production well
  • Wellhead discharge device and exhaust method of SAGD production well

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Embodiment Construction

[0026] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0027] The present application provides a wellhead drainage device for a SAGD production well, wherein the SAGD production well includes a casing and a drainage pipe arranged in the casing. Such as image 3 As shown, the wellhead drainage device in this embodiment includes a first pipeline 10 , a second pipeline 20 and a first throttling device 30 . Wherein, the first pipeline 10 communicates with the drain pipe, the first end of the second pipeline 20 communicates with the casing, and the second end of the second pipeline 20 is connected to the first pipeline 10 . The first throttling device 30 includes a one-way valve 31 and a first valve 32, wherein the conduction direction of the one-way ...

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Abstract

The invention provides a wellhead discharge device and an exhaust method of an SAGD production well and the SAGD production well. The SAGD production well comprises a sleeve and a liquid discharge pipe arranged in the sleeve. The wellhead discharge device comprises a first pipeline communicating with the liquid discharge pipe, a second pipeline and a first throttle device arranged on the second pipeline. The first end of the second pipeline communicates with the sleeve, and the second end of the second pipeline is connected to the first pipeline. The first throttle device comprises a one-way valve and a first valve which are arranged in a spaced mode. The conducting direction of the one-way valve is from the second end of the second pipeline to the first end of the second pipeline. By adoption of the technical scheme, the problems that an operator is prone to poisoning during exhaust operation of an SAGD production well exhaust device, and exhaust operation pollutes the environment are solved.

Description

technical field [0001] The invention relates to the technical field of super-heavy oil production, in particular to a wellhead discharge device for a SAGD production well, an exhaust method, and a SAGD double-horizontal well. Background technique [0002] In oil extraction technology, a large amount of natural gas dissolved in formation oil reservoirs under high temperature and pressure is called dissolved gas. In crude oil production, as the fluid enters the production well, the pressure gradually decreases. When the crude oil pressure is lower than the saturation pressure, the dissolved gas gradually separates from the crude oil into free gas, and slowly expands until it leaves the crude oil and enters the annular space of the oil casing. , this part of the gas is casing gas. If the gas pressure in the casing is too high, the dynamic liquid level will drop, the production pressure difference will decrease, and the pump efficiency will be affected. In severe cases, "air lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/00E21B34/02E21B43/24
CPCE21B17/00E21B34/02E21B43/2406
Inventor 张磊陈森伍文英蒲丽萍游红娟黄勇郭文德何小东李林李畅
Owner PETROCHINA CO LTD
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