(1) meet the high sand wells. Theoretically, the screw can transport amounted to 80% of mortar sand,hydraulic piston pump , sand down in crude oil amounted to 40% of the cases may be normal production (except sand buried situation).
(2) adaptation does not happen with high gas screw air lock, and therefore more suitable for mixed transportation of oil and gas,submersible fuel pump but the downhole pump inlet of free gas will affect the volumetric efficiency.
(3) suitable for offshore oilfield cluster wells and horizontal wells group. PCP can be under the slant hole section,gear type pump and small equipment footprint, making it suitable for offshore oil.
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