| 主权项 |
1. A gas separator for increasing liquid concentration of a well fluid, which includes a gaseous portion and a liquid portion, for use with a pump that has a seating assembly with a pump inlet, and which discharges into a tubing string that is located within a well casing, comprising:
a seating nipple with an interior cavity configured to engage and retain the seating assembly of the pump; an inner barrel sealably coupled between the tubing string at its upper end and said seating nipple, and configured to accommodate a portion of the pump therein; an outer barrel disposed about said inner barrel and said seating nipple, defining a well fluid annulus therebetween, and further defining a separation annulus that comprises the entire cross sectional area between the well casing and an exterior of said outer barrel, and having a well fluid outlet located above said seating assembly for communicating well fluids from said well fluid annulus to said separation annulus, and said outer barrel having a well fluid inlet located below said seating nipple, which enables well fluids to enter said fluid annulus; a liquid passage disposed between said exterior of said outer barrel and said interior cavity of said seating nipple, thereby enabling well liquids to flow from said separation annulus into said interior cavity of said seating nipple and into the pump inlet; an isolation means sealably disposed between the well casing and said separator, and located below said liquid passage and above said well fluid inlet, thereby preventing the flow of well fluids upwardly into said separation annulus, and wherein well fluids that flow into said separation annulus from said well fluid outlet are subject to gravity separation such that the gaseous portion rises within the separation annulus, and the liquid portion falls to said well liquid passage. |
