High-pressure gas well natural gas straight-charging type filling device

Abstract

The invention relates to a high-pressure gas well natural gas straight-charging type filling device which comprises an inlet stop valve, a gas-liquid separator, a filter, a stop valve, a throttle valve, a first control valve, a second control valve, a throttle heater, an outlet stop valve and a CNG canned car, wherein both sides of the gas-liquid separator are respectively connected with a high-pressure gas well and the filter through pipelines; the filter is connected with the throttle heater through the pipeline; the pipeline is provided with the stop valve; the stop valve is respectively connected with the first control valve, the second control valve and the throttle valve; the first control valve and the throttle valve are converged to be connected with an inner layer coiler of the throttle heater; the first control valve is connected with an outer layer coiler of the throttle heater; outlets of the inner layer coiler and the outer layer coiler are converged to be connected with the stop valve; and the stop valve is connected with the canned car. The device and the process adopted by the invention are simple and direct, continuous production can be realized in the conditions of high pressure and obturation, the price of the device and the running cost are low, and the invention can be utilized for preventing frozen block when high pressure natural gas is filled at an initial stage and can shorten the filling time.

Description

Technical field: [0001] The invention relates to a technical equipment for the production, storage and transportation of compressed natural gas (CNG) in high-pressure gas wells in oil and gas fields, belonging to the category of compressed natural gas storage and transportation technologies. Background technique: [0002] In the process of oil and gas field exploitation, a small number of high-pressure gas wells with pressures up to 20-30MPa are sometimes encountered. In order to recover natural gas from high-pressure gas wells, a water jacket furnace is usually used for heating and throttling into the external pipeline network. However, in some marginal single wells, in order to reduce investment risks, such as directly filling high-pressure steel cylinders for outbound transportation, the valve nozzles and pipelines may freeze and block due to high pressure ratio throttling during the process of high-pressure gas filling into empty cylinders. problem. The heating method of th...

AI Technical Summary

Problems solved by technology

However, in some edge single wells, in order to reduce investment risks, if direct filling of high-pressure steel cylinders is used to transport outside, there may be a problem of freezing and blockage of valve nozzles and pipelines due to large pressure ratio throttling during the filling process of high-pressure gas to empty cylinders. question

The water jacket furnace heating method has problems such as huge equipment, inflexible relocation, high energy consumption, etc., and freezing accidents may still occur when the full pressure ratio is too high in winter (the initial stage of empty bottle filling); During the filling process, as the pressure of the steel cylinder gradually increases, the filling volume per unit time decreases correspondingly, so the filling time is longer

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