Long-stroke hydraulically-controlled natural gas compressor

Abstract

The invention relates to a long-stroke hydraulically-controlled compressor in natural gas industry. The invention adopts the technical scheme as follows: a primary gas inlet valve and a secondary gas inlet valve are mounted at the upper parts of two ends of a gas cylinder, wherein a primary gas outlet valve and a secondary gas outlet valve are mounted on the lower parts of two ends of the gas cylinder; a gas inlet pipeline is connected to the primary gas inlet valve; the primary gas outlet valve, a heat exchanger, a reversing valve and the secondary gas inlet valve are connected in series through a pipeline; the bottom of the gas cylinder is in flange connection with a piston ring; a head of the cylinder is in threaded connection with an end cover; one end of an oil cylinder sleeve is in threaded connection with the piston ring; the other end of the oil cylinder sleeve is in clearance fit with the end cover; one end of a piston rod is placed in an inner cavity of the oil cylinder in a clearance fit manner; a lug ring on one end of the piston ring is hinged to a rack; the gas cylinder is fixedly connected to the rack. The long-stroke hydraulically-controlled compressor is long in stroke; the liquid compact can be avoided; a moving part is low in speed, low in noise and long in service life; the compressor is wholly prized; a hydraulic control manner is adopted, so that the compressor is flexible and reliable to control; the compressor can be applied to processes of discharging water and extracting gas, mixing and conveying gas and liquid and recycling scattered gas; the compressor is highly adaptive to variable working conditions.

Description

technical field [0001] The invention relates to a long-stroke liquid-controlled compressor used in the oil and gas industry. Background technique [0002] Compressors are important equipment used in the process of natural gas collection, transportation, and storage. In recent years, compressors have played a huge role in engineering fields such as drainage gas recovery, low-pressure gas recovery, and pressurized mixed transportation. Existing natural gas compressors for mines mainly include vane type, screw type and reciprocating type. Sliding vane compressors have extremely low efficiency and require a large amount of lubricating fluid; screw compressors are difficult to process, have a large amount of leakage, and are prone to medium and high frequency noise, so they are only used in medium and low pressure ranges; reciprocating compressors have a short stroke , unable to adapt to the working conditions of liquid-containing gas, it is easy to cause liquid shock and seriou...

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Problems solved by technology

[0004] Purpose of the present invention: to meet the needs of gas field wellhead natural gas tapping potential and increasing efficiency, avoiding waste of exploration resources, and overcoming the problems of existing compressors such as low efficiency and difficulty in adapting to complex working conditions (compression medium changes, large intake pressure fluctuations), etc., it is specially provided A long-stroke liquid-controlled natural gas compressor

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