Bottom hole oil well pump

Patent · Tue Sep 21 04:00:00 EDT 1982

OSTI ID:6784435

Hansen, J E; Hinds, W E; Oldershaw, P V

A bottom hole well pump is disclosed comprising a pump housing supported by a control cable for raising and lowering the housing within tubing in a well, a linear motor within the housing causing reciprocation of a plunger extending into a pumping chamber formed by the housing with inlet and outlet check valves for controlling flow of oil or other liquid into the pumping chamber and from the pumping chamber into the tubing above the pump housing. In one embodiment, belleville-type springs are employed for storing energy as the plunger approaches its opposite limits of travel in order to initiate movement of the plunger in the opposite direction. In this embodiment, a single pumping chamber is formed above the linear motor with a single-valve block arranged above the pumping chamber and including inlet check valve means for controlling liquid flow into the pumping chamber and outlet check valve means for controlling liquid flow from the pumping chamber into the tubing interior above the pump housing. In another embodiment, pumping chambers are formed above and below the linear motor with a tubular plunger extending into both pumping chambers, in order to achieve pumping during both directions of travel of the plunger.

• Assignee: EDB-83-047621
• Patent Number(s): US 4350478
• OSTI ID: 6784435
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
CONTROL EQUIPMENT
DESIGN
EQUIPMENT
FLOW REGULATORS
OIL WELLS
PUMPS
RESERVOIR PRESSURE
SEALS
VALVES
WELL PRESSURE
WELLS