A booster-type drainage gas production device for the "snake-curved" horizontal section of a horizontal well

Abstract

The invention discloses a booster drainage and gas production device suitable for the "serpentine" horizontal section of a horizontal well. They are respectively fixedly connected with the front fixing seat and the rear fixing seat. The front fixing seat and the rear fixing seat are both disc-shaped, and are provided with holes for the fluid to flow along its axial direction; A booster, which can make the channels on the front and rear fixing seats in a connected state when approaching the front fixing seat, and block the channels on the front and rear fixing seats when approaching the rear fixing seat to help A reset mechanism is arranged between the push piece and the rear fixing seat. The patent of the invention makes full use of the production air pressure to push forward the liquid accumulation in the low-lying areas of the horizontal section, prevent the production of gas wells from being affected by the liquid accumulation in the low-lying areas of the horizontal section, accelerate the liquid discharge rate, improve the efficiency of drainage and gas recovery, and ensure normal production capacity.

Description

technical field [0001] The invention belongs to drainage and gas recovery devices for gas production wells in oil and gas fields, and in particular relates to a boosting drainage and gas recovery device for the "snake" horizontal section of a horizontal well. Background technique [0002] During the production of gas wells, liquid accumulation or water production may occur in the wellbore of the gas well and the formation near the bottom of the well, which will affect the normal production of the gas well. Horizontal wells are currently an important well type for natural gas exploitation. Due to the influence of geological conditions and drilling technology, it is difficult to ensure that the horizontal section is in a straight state during the drilling process of horizontal wells, and "snake" type horizontal sections often appear. , its horizontal section presents an up-and-down undulating structure in the longitudinal direction, and a "concave" structure and a "convex" str...

AI Technical Summary

Problems solved by technology

During the gas well production process, when the bottom of the well begins to produce water, due to the difference in gas-liquid density, gas-liquid separation will occur in the horizontal section, the gas flows in the upper part of the pipeline, and the gas flows in the lower part of the pipeline. The curved structure often causes liquid accumulation in the low-lying places of the "sag", which blocks the gas flow channel, affects the normal production of the gas well, and reduces the efficiency of the gas well

[0003] At present, drainage gas recovery technologies mainly include foam drainage gas recovery, plunger soaked water gas recovery, optimized pipe string drainage gas recovery, and machine-pumped drainage gas recovery. There are few researches on the drainage and gas recovery devices and tools of the low-lying liquid accumulation wells in the "snake" type horizontal section. At present, it is still in the blank period of technology

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