Drag reduction sand control has pole oil -well pump

The utility model relates to a drag reduction sand control has pole oil -well pump sets up the recess in plunger upper portion outer lane to supporting rubber circle has realized the sealed of plunger and pump barrel clearance, solved the plunger during last bottom dead centre, the closing well etc. During the pump bring to rest gravel problem that pump barrel and plunger clearance leads to the fact the sand card gets into easily. Rubber circle structure has become flexible contact with the rigidity contact of plunger and pump barrel in the past, through increasing pump barrel plunger clearance and area of contact, reduces plunger resistance down. The radius platform structure and the inside streamlined runner of plunger dump valve department can reduce the down resistance of plunger, make in the pit the fluid change in the outflow pump chamber. The lower half has streamlined runner in the inlet valve, can reduce the resistance that well liquid passes through inlet valve department.