Medicine feeding device for removing well-bottom accumulated liquid of gas well and using method of medicine feeding device

Abstract

The invention discloses a medicine feeding device for removing well-bottom accumulated liquid of a gas well and a using method of the medicine feeding device. The medicine feeding device comprises a blow-down pipe, a connector and a medicine falling pipe which are sequentially connected from top to bottom. The upper end of the connector is connected with a blow-down gate through a pipe nipple, andthe upper end of the blow-down gate is connected with the blow-down pipe. The lower end of the connector is connected with the medicine falling pipe through a screw thread. A foaming agent can be quickly and conveniently put into the well, in the putting process of the foaming agent, the foaming agent cannot stick to the inner wall of a wellhead or be blocked on a boss inside the wellhead or be clamped in the wellhead, thus wellhead pollution is reduced, certain construction potential safety hazards are eliminated, the labor intensity of a worker is reduced, and the well opening time rate isincreased.

Description

technical field [0001] The invention relates to natural gas exploitation technology, in particular to a dosing device for gas wells to remove bottom fluid accumulation and its application method. Background technique [0002] In natural gas production, with the gradual reduction of gas reservoir pressure and natural gas flow velocity, 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. Usually, if this situation continues, the accumulated fluid column in the wellbore will eventually kill the pressure, causing the well to shut down. This phenomenon is called "fluid accumulation in gas well". Drainage gas recovery is an effective method t...

AI Technical Summary

Problems solved by technology

During the input process, the foaming agent is likely to stick to the inner wall of the wellhead or be blocked by the boss inside the wellhead, or multiple foaming agents are squeezed into the wellhead, causing the foaming agent to fail to fall into the bottom of the well and cannot reach the bottom of the well. The purpose of stagnant water

In order to re-introduce the foaming agent, the workers have to push out the foaming agent that has not fallen into the bottom of the well with the pressure in the well, resulting in waste of foaming agent costs and wellhead pollution during the construction process. Reduced gas production well start-up time rate

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