Boosting type water drainage and gas production device for horizontal well zigzag-shaped horizontal section

Abstract

The invention discloses a boosting type water drainage and gas production device for a horizontal well zigzag-shaped horizontal section. The boosting type water drainage and gas production device comprises a mounting shaft, a front fixing seat and a rear fixing seat, wherein the front fixing seat and the rear fixing seat are oppositely arranged; the front end and the rear end of the mounting shaft are fixedly connected with the front fixing seat and the rear fixing seat correspondingly; the front fixing seat and the rear fixing seat are each in a disc shape and are each provided with a hole channel allowing fluid to circulate in the axial direction of the front fixing seat and the rear fixing seat; the mounting shaft is provided with a movably-arranged boosting piece; when the boosting piece is close to the front fixing seat, the hole channels in the front fixing seat and the rear fixing seat are in a communicating state; and when the boosting piece is close to the rear fixing seat, the hole channels in the front fixing seat and the rear fixing seat are blocked; and a reset mechanism is arranged between the boosting piece and the rear fixing seat. According to the boosting type water drainage and gas production device, production air pressure is fully utilized, accumulated liquid at the low-lying position of the horizontal section is pushed to move forwards, the situation that gas well production is affected by the accumulated liquid at the low-lying position of the horizontal section is prevented, the liquid drainage rate is increased, the water drainage and gas production efficiency is improved, and the normal production capacity is guaranteed.

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...

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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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