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Control system and method for accumulated liquid in large-caliber flash steam pipeline in oil field

A control system and flash gas technology, applied in pipeline systems, gas/liquid distribution and storage, mechanical equipment, etc., can solve the problem of high construction cost or operating cost requirements, achieve the expansion of flow assurance technical means and directions, and reduce the size The effect of low liquid volume and low operating frequency

Pending Publication Date: 2021-03-19
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
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Problems solved by technology

The above schemes require relatively high construction or operating costs

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  • Control system and method for accumulated liquid in large-caliber flash steam pipeline in oil field

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Embodiment Construction

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0039] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

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Abstract

The invention discloses a control system for accumulated liquid in a large-caliber flash steam pipeline in an oil field. The control system comprises a high-temperature mixed gas conveying system, a main line mixing system and a matched control system; the high-temperature mixed gas conveying system is used for taking out high-temperature pressurized gas from an outlet of a compressor and reversely conveying the high-temperature pressurized gas to the main line mixing system; the main line mixing system is used for regulating the pressure of high-temperature flash steam provided by the high-temperature mixed gas conveying system and then injecting the high-temperature flash steam into a predetermined mixing point at the tail section of a flash steam main line so as to heat and gasify the accumulated liquid at the tail section of the flash steam main line and purge the accumulated liquid; and the matched control system is used for controlling the flow of mixed gas and detecting the injection temperature of the mixed gas and the pressure of the conveying system. Based on the distribution rule and composition characteristics of the accumulated liquid in the flash steam pipeline in theoil field, a flash steam treatment plant can be used for pressurizing and providing the high-temperature flash steam to be reversely injected into the flash steam pipeline, so that the temperature and the conveying capacity of a medium at the tail section of the flash steam pipeline are improved, and most accumulated liquid at the tail section of the flash steam pipeline is gasified and carried to a downstream flash steam treatment plant, so that the accumulated liquid in the pipeline is reduced.

Description

technical field [0001] The invention belongs to the technical field of oil field flash gas pipeline transportation, and in particular relates to a liquid accumulation control system and method for large-diameter flash gas pipelines in oil fields. Background technique [0002] During the operation of the oilfield central treatment plant, the light components in the oil are generally removed in a stable way of high temperature and pressure reduction, and the light components removed are called flash gas. In recent years, with the improvement of environmental protection and energy saving requirements, flash gas produced in oil fields has been recovered by establishing flash gas pipelines. The flash gas has the characteristics of low pressure, high temperature, and light components, and a large amount of condensate can be precipitated at a lower temperature (C 3 -C 5 components). [0003] For the flash gas pipeline, due to the pressure reduction and large output, it usually h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D1/06F17D1/07F17D3/01F17D3/18F17D3/14
CPCF17D1/005F17D1/06F17D1/07F17D3/01F17D3/18F17D3/145
Inventor 陈俊文甘淳静刘路涂洁张诚汤晓勇杨帆郭艳林昝林峰徐嘉爽宋希勇
Owner BC P INC CHINA NAT PETROLEUM CORP
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