Natural gas well fluid separator

Abstract

The invention relates to the technical field of natural gas extraction, and discloses a natural gas well fluid separator which comprises a mandrel, a plugging column and a circumferential sealing mechanism. An upper circulation opening and a lower circulation opening which are communicated with the outside are formed in the two axial ends of the mandrel respectively, an upper fluid channel and a lower fluid channel which extend in the axial direction of the mandrel are formed in the mandrel, the upper fluid channel and the lower fluid channel are communicated with each other, and the inner diameter of the upper fluid channel is smaller than that of the lower fluid channel. The plugging column is arranged in the lower fluid channel in an axially movable mode and is constructed to do reciprocating motion between a plugging position and an opening position. The circumferential sealing mechanism is arranged around the mandrel. The plugging column is constructed to block communication between the upper fluid channel and the lower fluid channel when the plugging column is located at the plugging position, and the upper fluid channel and the lower fluid channel are communicated with each other when the plugging column leaves the plugging position. According to the natural gas well fluid separator provided by the invention, the lifting efficiency is guaranteed, and meanwhile, the natural gas well fluid separator can descend more easily.

Description

technical field [0001] The present application relates to the technical field of natural gas exploitation, in particular to a fluid separator for a natural gas well. Background technique [0002] During the production of natural gas wells, bottomhole fluid accumulation is an important factor affecting the production of natural gas wells. In order to increase the production of natural gas wells, it is necessary to drain bottomhole fluids from the natural gas wells. [0003] Plunger (also known as fluid divider) drainage is a drainage gas recovery technique. The plunger includes a plurality of sealing gaskets, and these sealing gaskets are in contact with the inner wall of the shaft under the action of the elastic member to form a seal. In the shut-in state, the plunger goes down to the bottom of the well. When the well is opened, the thrust generated by the fluid below the plunger drives the plunger upward, thereby lifting the accumulated fluid above the plunger and discha...

AI Technical Summary

Problems solved by technology

The problem with the above-mentioned plunger is that the plunger may not be able to go down when shutting in the well due to the joint action of fluid resistance and the friction between the sealing gasket and the inner wall of the well.

However, the flow channel through the upper and lower leads to a substantial increase in the leakage when the plunger goes up, which reduces the lifting efficiency of the bottom hole fluid

In some cases, it may also cause the plunger to fail to return to the wellhead, posing a safety hazard

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