RHA API Pump
LUFKIN Don-Nan
RHA API insert pumps are heavy-walled, stationary barrel, top anchor pumps recognized by API as a standard design.
Don-Nan RHA API insert pumps are heavy-walled, stationary barrel, top anchor pumps recognized by API as a standard design.
These pumps are suitable for moderate depths with high sand fallback on well shutdown. Fluid dispersion directly above the seat nipple prevents the pump from becoming stuck in such a situation.
The heavy-walled barrel is less sensitive to pressure than the similar Don-Nan RWA pump and therefore may be run slightly deeper than thin-walled RWA API insert pumps.
The seating options on this pump include mechanical or cup types suitable for high temperatures and mechanical types to simplify well maintenance. A mechanical hold-down does not require repair unless major damage has occurred, whereas cups should be replaced every time the pump is unset. Both hold-down types follow the same procedure of setting by placing the weight of the sucker rods down on the pump and unsetting by lifting them up.
The heavy-walled barrel is less sensitive to pressure than the similar Don-Nan RWA pump and therefore may be run slightly deeper than thin-walled RWA API insert pumps.
The seating options on this pump include mechanical or cup types suitable for high temperatures and mechanical types to simplify well maintenance. A mechanical hold-down does not require repair unless major damage has occurred, whereas cups should be replaced every time the pump is unset. Both hold-down types follow the same procedure of setting by placing the weight of the sucker rods down on the pump and unsetting by lifting them up.
