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Device and method for throttling wellheads of gas storages

A technology of throttling device and gas storage, which is applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve problems such as low energy utilization rate and achieve good throttling effect

Active Publication Date: 2016-04-20
PETROCHINA CO LTD
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Problems solved by technology

[0004] The invention provides a gas storage wellhead throttling device and a throttling method to solve the problem of low energy utilization rate when performing throttling treatment on existing gas storage wells

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  • Device and method for throttling wellheads of gas storages

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Embodiment Construction

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention will now be described with reference to the accompanying drawings.

[0027] Such as figure 1 As shown, the present invention provides a gas storage wellhead throttling device, and the gas storage wellhead throttling device includes:

[0028] The inlet device 1 has the functions of sealing and data collection, and has a strong sealing effect under high temperature and high pressure. It is equipped with pressure, temperature, and flow sensors, and can be equipped with flow control equipment for high-pressure gases; the inlet device 1 has a high-pressure chamber ;

[0029] The screw expander ensures a large flow of gas, and its shape should be fine-tuned according to different gas storage pressures. The screw expander includes: a shell, an inlet and an outlet arranged on the shell, and a conical screw 2 located in the shell ; said inlet...

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Abstract

The invention provides a device and a method for throttling wellheads of gas storages. The device for throttling the wellheads of the gas storages comprises an inlet device (1), a screw expander, a separation bin (6), a drain device (10) and an exhaust device (12). The screw expander comprises a shell, inlets, outlets and a conical screw (2), the inlets and the outlets are formed in the shell, and the conical screw (2) is positioned in the shell; the inlets are connected with the inlet device (1); the separation bin (6) is connected with the outlets; the drain device (10) and the exhaust device (12) are respectively arranged on the separation bin (6). The method for throttling the wellheads of the gas storages is implemented by the aid of the device for throttling the wellheads of the gas storages. The device and the method have the advantages that the device has oil and gas mixture separation, residual pressure power generation and wellhead gas throttling functions, accordingly, existing gas nozzles of the wellheads of the gas storages can be replaced, and the purposes of lowering the cost and improving the efficiency of the gas storages can be ultimately achieved.

Description

technical field [0001] The invention relates to the field of oil and gas storage and transportation, in particular to a gas storage wellhead throttling device and a throttling method. Background technique [0002] Gas storage wells rely on high formation pressure for self-spraying gas production. Because the formation pressure is high, gas nozzles are generally installed at the wellhead, and the pressure is reduced by controlling the flow rate to meet the requirements of dew point treatment and external transportation. However, the throttling method of the air nozzle only plays a role in reducing pressure, and the energy utilization rate is low. For example, the kinetic energy of the airflow is not utilized, and the cold energy generated after throttling is not only unutilized, but also needs to be injected with alcohol and other substances at the wellhead to prevent freezing. , increasing operating costs. [0003] To sum up, the following problems exist in the prior art: t...

Claims

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Application Information

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IPC IPC(8): E21B43/12E21B43/34F01C13/00
CPCE21B43/121E21B43/34F01C13/00
Inventor 郑得文唐立根王皆明丁国生
Owner PETROCHINA CO LTD
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