Oil well pump

The utility model provides an oil well pump, including barrel, plunger with go up the traveling valve, oil well pump still include upper and lower both ends respectively with go up the traveling valve with plunger threaded connection's hollow stud, be equipped with the recess on hollow stud's the lateral wall, form the cavity of the air feed body and sand grain gathering between recess and the barrel. The in -process that plunger among the oil well pump reciprocated is established recess on hollow stud lateral wall and is supplied gaseous and sand grain gathering between plunger and the barrel, and gathering gaseous in the recess be with the sand grain in hollow stud rebound entering oil pipe the time, follows well liquid and is pumped subaerially, prevents effectively that the plunger is by the emergence of sand grain jamming and airlock phenomenon. 本实用新型提供了种抽油泵，包括筒体、柱塞和上游动阀，抽油泵还包括上下两端分别与所述上游动阀和所述柱塞螺纹连接的空心双头螺柱，所述空心双头螺柱的侧壁上设有凹槽，凹槽与筒体之间形成供气体和砂粒聚集的腔室。抽油泵中的柱塞上下移动的过程中，设在空心双头螺柱侧壁上的凹槽供柱塞和筒体之间的气体和砂粒聚集，聚集在凹槽中的气体和砂粒在空