Throttling and heating production device and throttling and heating production method for well mouth of gas well

Abstract

The invention provides a throttling and heating production device and a throttling and heating production method for a well mouth of a gas well. The throttling and heating production device comprisesa production pipeline, a heat tracing device, an impeller expander, a control valve and a power supply system. The heat tracing device and the control valve are arranged on an outlet section of the production pipeline, the impeller expander is arranged between the heat tracing device and the control valve, and the power supply system is electrically connected to the heat tracing device and the impeller expander, separately. The impeller expander not only can generate electricity, but also plays throttling and pressure-reducing roles. The heating device can improve the temperature of a naturalgas medium in the pipeline. The device can replace an underground throttling process to reduce the production investment cost, the construction difficulty and the safety risk, and throttling production of the gas well is adjusted from an underground uncontrollable state to a ground adjustable controllable state, so that the well stopping period caused by production adjustment is shortened greatly.Meanwhile, as the well mouth is heated, the temperature of the natural gas medium in the production pipeline can be improved, the forming probability of hydrates can be reduced, and a problem of freezing and plugging a single-well pipeline in winter can be alleviated.

Description

technical field [0001] The invention relates to the field of natural gas development, and is particularly suitable for the low production capacity of a single well and low-cost development of gas fields, and particularly relates to a production device and method for throttling and heating at the head of a gas well. Background technique [0002] Sulige Gas Field is a typical "low permeability, low pressure, low yield, low abundance" gas field. Since it was put into development and evaluation in 2002, the understanding of the gas field has been deepened, and the effective economic development of the gas field must "rely on technology and innovative mechanisms , Simplify mining, and take the road of low-cost development.” During this period, the core of drilling and production technology was cost reduction, and a series of technology tests represented by rapid drilling, layered fracturing and downhole throttling were carried out. Through the supporting tests of downhole thrott...

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the cumbersome construction, heavy workload, and high overall cost of the existing downhole throttling process; the downhole throttling process has high requirements for downhole tools, and the maintenance construction is difficult, costly, and long-term, with high safety risks. The maintenance process Problems Affecting Normal Production of Gas Wells

The invention provides a gas well wellhead throttling heating production device and method. The invention does not require a downhole throttling device, meets the requirements of medium and low pressure gas gathering technology and solves the problem of single well pipeline freezing in winter, further reduces the cost of gas well development and production operation, shortens Adjust the cycle of production and shutdown, so that the throttling of the gas well is transferred from the uncontrollable downhole state to the controllable state on the ground

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