Insert SRPs are lowered inside the tubing as an assembled unit with sucker rods.

ELKAM manufactures tubing SRPs with nominal size from 1 1/4" up to 4 3/4".

Beam pumping unit is a mechanism which puts a downhole pump into operation during artificial lift. It turns rotary movement of engine shaft into reciprocating movement of sucker rods and sucker rod string

Hydraulic pumping unit (HPU) is an alternative to beam pumping unit used for oil production by SRP.