In solid strata, fluid flows into the well casing through perforations locate below the pump.
Inside of the casing, much of the heavy particles carried by the fluid drops to the cellar of the well. Meanwhile the progressing cavity pump propels the fluid to the surface including some solids such as sand or coal.
"Kelian" series of screw oil-extracting pumps put out by the Company consist of more than twenty kinds of specifications with theoretical daily discharge of 0bbl-1400bbl, down-hole depth up to 1900m(6300ft);Our products are widely used in domestic CNPC, Sinopec, CNOOC for the oil and gas engineering, and have been exported to Egypt, Oman, Venezuela, Kazakhstan, Chad and other countries.
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