Two types are insert and two packer. The insert type uses an expanding tubing section and a dip tube, whereas the two-packer type uses the tubing and the tubingcing annulus.
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Accumulation chamber equipment is used in gas lift when the volume of formation fluids produced makes continuous gas lift impractical.
The fluids are allowed to build up in ihe chamber until intermittent application of compressed gas Forces the accumulated fluids up the production tube. As the fluids flow up the tubing, the formation is protected from the pressure by closing of the standing valve.