Gas Separators

The downhole Collar-Size Gas Separator is used when the downhole pump is placed in the producing zone or above the producing zone. These Collar-Size Gas Separators are designed with thin-wall tubing, large ports and minimum lengths to optimize gas separation from the liquid that enters the pump. These separators have greater liquid and gas capacities than other gas separators.

The gas separators are constructed from carbon steel. The OD of the outer barrel of the gas separator is the same OD as the tubing collar. The collar at the top of the separator is attached to the bottom of the pump seating nipple. An optimum size dip tube is permanently mounted inside the outer barrel. A half-collar is located at the bottom of the separator with a bull plug attached to the bottom of the half-collar. A joint of tubing can be run below the bottom half-collar to act as a solids collection chamber if desired. The length of the gas separator is approximately 6 feet.

Please refer to the technical paper available at this website for details of the design, construction, liquid capacities and gas capacities of the various separators. The paper describes downhole gas separation principles including setting the pump below the formation as well as a description of this collar-size gas separator which is to be used when the pump is set in or above the formation. The thin-wall construction, large ports and proper size dip-tube result in maximum liquid and gas capacities. Following are liquid capacities of the various gas separators. A larger size gas separator than tubing size can be used for larger liquid capacities. The technical paper describes the gas capacity which is a function of the casing size, gas separator size and well bore pressure surrounding the gas separator. 

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COLLAR-SIZE EUE, INCH	LIQUID CAPACITY BPD	WEIGHT LBS.
2 3/8 (3.0" OD)	230	46
2 7/8 (3.75" OD)	415	52
3 1/2 (4.5" OD)	600	75