ARTIFICIAL LIFT

A tight tubing anchor sends gas into the pump

How slugging gas stacks up under a restrictive anchor until the TOPS gas separator draws it in, and what changes when the annulus is opened up.

    Gas velocity at anchor
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    Pump fillage
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    Superficial gas velocity through the anchor

    Pump fillage, last 30 seconds

    Schematic, not to scale. Gas velocities are from a two-phase flow regime analysis of this BHA: about 9 m/s through the restrictive anchor versus about 1.5 m/s in the tubing and separator annulus. Liquid begins holding up in the annulus above about 3 m/s. Cycle timing and the fillage trend are illustrative. Weatherford®