| 摘要 |
A method and apparatus are disclosed to detect periodic well loading by produced accumulated secondary fluids, and accordingly to remove the undesired secondary fluid from the tubing of a hydrocarbon producing well. The method according to the present invention employs a surface control system that controls the operation of the fluid removal cycle and the production cycle of the hydrocarbon producing well. Periodically, the well is "shut-in" and a flow control valve, connected to the well tubing, is actuated to block fluid flow from the lower portion of the tubing string, which contains the undesired accumulated secondary fluids. A supply line, having a smaller inner diameter than the internal diameter of the well tubing, is used to inject pressurized gas from the surface of the well into the lower "shut-in" portion of the tubing to provide the necessary pressure to force the accumulated secondary fluids, trapped in the tubing, through a relief valve, and into the annulus of the well casing; thereby removing the undesired secondary fluids from the production tubing. The controller then stops the flow of the injected gas to the supply line to stop the removal cycle and the pressure across the flow control valve is equalized to again begin production.
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