Ground reciprocating roller screw driven gas well simultaneous injection and production device and injection and production process thereof

The gas well injection and production device driven by a reciprocating roller screw on the ground solves the problem of water flooding in gas wells, realizes efficient and stable injection and production in the same well, improves recovery rate and economic benefits, and is suitable for large casing wells.

CN121407888BActive Publication Date: 2026-05-26NORTHEAST GASOLINEEUM UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHEAST GASOLINEEUM UNIV
Filing Date
2025-12-24
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing co-injection and production technology has not yet been applied to gas wells, leading to the 'water flooding' problem in gas wells and affecting recovery rates.

Method used

The surface reciprocating roller screw driven gas well injection and production device is adopted. It uses a reciprocating drive mechanism, tubing, power plunger, gas-liquid separator and lower plunger pump to achieve gas-liquid separation and liquid injection through reciprocating motion, combined with packer to isolate the injection layer and the production layer.

Benefits of technology

It achieves efficient, stable, and energy-saving simultaneous injection and production in gas wells, improves extraction efficiency and economic benefits, is suitable for large-casing wells, reduces maintenance costs, and is adaptable to the development of deep high-pressure gas reservoirs.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention relates to a surface reciprocating roller screw-driven gas well injection and production device and its injection and production process. The surface reciprocating roller screw-driven gas well injection and production device includes a reciprocating drive mechanism, tubing, a power plunger, a transmission plunger, a gas-liquid separator, and a lower plunger pump. The reciprocating drive mechanism is located on the surface. The power plunger is located in the lowest tubing, forming an upper and lower oil chamber. The lower end of the tubing is connected to the gas-liquid separator, and the lower end of the power plunger is connected to the transmission plunger. The lower plunger pump inlet is located in the gas-liquid separator. A packer is connected to the lower end of the lower plunger pump's outer cylinder to isolate the injection and production layers. The reciprocating drive mechanism includes a motor, a reciprocating roller screw, a left piston, and a right piston. Surface power fluid enters the lower oil chamber through a power pipeline, and spent power fluid returns to the left hydraulic chamber. This invention combines gas-liquid separation and packer technology to achieve continuous and stable gas-liquid injection and production, improving oil and gas recovery rates.
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Citation Information

Patent Citations

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  • Downhole oil-water separation and same well injection-production device and method capable of utilizing single motor to drive two pumps

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