Wellbore control device and wellbore control method

A technology of a control device and a control method, which is applied to wellbore/well valve devices, wellbore/well components, earth-moving drilling, etc., can solve the problems of high wellhead pressure and inconvenient oil production, and achieve convenient oil production and ensure installation and production. , the effect of consistent upper and lower pressure

Pending Publication Date: 2022-07-29
PETROCHINA CO LTD
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  • Claims
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Problems solved by technology

[0003] The main purpose of the present invention is to provide a wellbore control device and a wellbore control method to solve the problem of high wellhead pressure and inconvenient oil production in horizontal wells in the prior art

Method used

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  • Wellbore control device and wellbore control method

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Embodiment Construction

[0020] It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0021] In order to solve the problem of inconvenient oil production due to high wellhead pressure in the prior art, the present invention provides a wellbore control device and a wellbore control method.

[0022] Please refer to figure 1 and figure 2 , a wellbore control device for controlling the pressure of oil in the horizontal section of the wellbore, the wellbore control device comprises: a bridge plug 10, the bridge plug 10 is arranged in the horizontal section of the wellbore; a switch assembly 20, the switch assembly 20 is connected with the bridge plug 10, The switch assembly 20 is provided with a switch valve 21 and a liquid passage 22, and the switch valve...

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Abstract

The invention provides a wellbore control device and a wellbore control method, in order to achieve the purpose, according to one aspect of the invention, the wellbore control device is provided and used for controlling the pressure of oil in a wellbore horizontal section, and the wellbore control device comprises a bridge plug arranged in the wellbore horizontal section; the switch assembly is connected with the bridge plug, a switch valve and a liquid passing channel are arranged in the switch assembly, and the switch valve is movably arranged at one end of the liquid passing channel; and the switch valve is provided with a separation position and a break-through position, so that when the switch valve moves to the break-through position, the liquid passing channel is communicated with the shaft, and when the switch valve moves to the separation position, the liquid passing channel is disconnected from the shaft. The shaft control device solves the problem that oil extraction is inconvenient due to high wellhead pressure of a horizontal well in the prior art.

Description

technical field [0001] The invention relates to the technical field of oilfield exploitation, in particular to a wellbore control device and a wellbore control method. Background technique [0002] The wellhead pressure of existing shale oil wells is as high as 30MPa at the initial stage of production, which brings many difficulties to oil production operations. In order to cope with the high wellhead pressure, casing is currently used for production, but the casing has serious wax deposition, high wax removal costs, and inability to Although the problems caused by high wellhead pressure have been partially solved by directly establishing well kill channels and high risk of well control, many new problems have also been added, which is very inconvenient. SUMMARY OF THE INVENTION [0003] The main purpose of the present invention is to provide a wellbore control device and a wellbore control method, so as to solve the problem that the high wellhead pressure of the horizonta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/134E21B33/14E21B34/08
CPCE21B33/134E21B33/14E21B34/08
Inventor 谢建勇叶俊华李文波张辉王海龙褚艳杰宋多培周其勇马江波马立华
Owner PETROCHINA CO LTD
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