A surface unit reciprocates a rod string for a downhole pump in a slantedwell.The unit has a beam with a bend and pivots at a pivot between the bend and thehorsehead of the beam. A post of the unit supports the pivot and is orientedto supportthe beam's load along the post and reduce bending stress. A crank arm isrotated by aprime mover about a crank point and translates pitman arms to oscillate thebeam onthe pivot, which reciprocates the rod string at surface along the slantedaxis. The unitcan be set at various offset distances relative to the intersection of thewell so the unitcan be used at various inclinations of slanted axis. The horsehead defines asegmentwith a face to accommodate at least 70% engagement or greater with the rodload forboth largest and smallest inclinations.
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