Gas well downhole composite high-efficiency drainage and throttling device

Abstract

The invention discloses a gas well downhole composite high-efficiency drainage throttling device, which comprises an upper center pipe and a lower center pipe. The sleeve is provided with a sealing tube and a lower pressure cap, the upper part of the lower pressure cap is provided with a ratchet ring seat, the ratchet ring seat is provided with a ratchet ring, and the upper part of the ratchet ring is provided with a ratchet ring centering sleeve and a ratchet ring upper Pressing cap, the upper part of the pressing cap on the ratchet ring is provided with an apron, the upper part of the apron is provided with the lower slip seat, slips and upper slip seat, the upper part of the upper slip seat is provided with a fishing rod, and the upper center pipe The upper end of the atomization cylinder is provided with an atomizing cylinder, which is provided with a first spray chamber, a swirl flow generating chamber and a second spray chamber connected in sequence, and the upper end of the atomization cylinder is provided with a delivery head. The invention has reasonable design, can effectively improve the liquid-carrying capacity of the natural gas in the wellbore, reduces the formation of liquid accumulation in the wellbore, improves the production capacity of the gas well, has good application effect, and is easy to popularize.

Description

technical field [0001] The invention belongs to the technical field of natural gas exploitation, and in particular relates to an underground compound type high-efficiency drainage and throttling device of a gas well. Background technique [0002] In the process of natural gas production, with the continuation of production time, the bottom hole pressure of the gas well and the flow rate of natural gas gradually decrease, so that the produced water or condensate in the gas reservoir cannot be carried out of the wellbore with the natural gas flow, and thus remain in the wellbore. These liquids accumulate at the bottom of the well for a period of time, forming a liquid column, causing additional hydrostatic back pressure on the gas reservoir, resulting in a continuous decline in the self-flowing energy of the gas well. Typically, if this continues, the accumulated fluid column in the wellbore will crush the gas, shutting down the well. This phenomenon is called "fluid accumula...

AI Technical Summary

Problems solved by technology

In order to solve the problem of fluid accumulation in the wellbore of gas wells, a lot of research has been carried out at home and abroad. At present, the drainage process is mainly based on foam drainage for gas recovery, especially for the situation of a large amount of fluid accumulation in the wellbore or below the restrictor. Generally, salvage is required. Foam drainage can only be implemented after the downhole choke, and the choke is difficult to salvage, which has become an important factor restricting the production capacity of this part of the gas well

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