Engine end for a downhole hydraulically actuated pump assembly

Patent · Tue Apr 14 04:00:00 EDT 1992

OSTI ID:5021847

Roeder, G K

This patent describes a hydraulically actuated downhole pump assembly for producing a well when power fluid is pumped thereto whereupon produced fluid admixed with spent power fluid is returned therefrom. It comprises: the engine end has an engine piston connected to actuate the pump end; the engine end has an annular outer housing, the annular valve element moves axially between an uphole position and a downhole position respective to the annular housing ; the engine piston moves axially within the annular valve element between an uphole position and a downhole position respective to the engine barrel; flow passageway means connecting the valve element for conducting flow of power fluid to the engine end to provide a force against the engine piston to move the engine piston in an uphole and downhole direction, whereupon the annular valve element is moved between an uphole and downhole position in response to the movement of the engine piston and conducts flow of power fluid to alternate sides of the engine piston to provide a force against the engine piston to reciprocate the engine piston.

• Assignee: NOV; EDB-92-118754; NOV-92-031049
• Patent Number(s): A; US 5104296
• Application Number: PPN: US 7-577390
• OSTI ID: 5021847
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300 -- Petroleum-- Drilling & Production
42 ENGINEERING
422000* -- Engineering-- Mining & Underground Engineering-- (1980-)
ACTUATORS
CONTROL EQUIPMENT
DRILLING
ENGINES
EQUIPMENT
HEAT ENGINES
HYDRAULIC CONTROL DEVICES
INTERNAL COMBUSTION ENGINES
OIL WELLS
PISTONS
PUMPING
WELL DRILLING
WELLS