A combined oil well pump

Abstract

The invention discloses a combined oil well pump, which belongs to the technical field of oil well pumps, and comprises an oil pipe, a pump barrel, a supporting mandrel, a supporting joint, a valve rod and a pump barrel; the end part of the supporting joint is connected with the oil pipe; the supporting mandrel is coaxially arranged inside the supporting joint; the valve rod is arranged in the supporting mandrel in a penetrating way; a clamping assembly is arranged between the supporting mandrel and the supporting joint; the clamping assembly comprises an adjustable lock claw arranged on the supporting mandrel and an unlocking block arranged on the valve rod; a stop ring corresponding to the lock claw is arranged on the inner ring of the supporting joint; a limit ring is arranged at the upper end of the supporting mandrel; the limit ring corresponds to the stop ring. The invention solves the problem that the pump inspection operation is complex and the whole oil pipe needs to be pulled out in the prior art.