Submersible pumping unit

Patent · Tue May 27 04:00:00 EDT 1986

OSTI ID:5373336

Pope, K E

A submersible downhole pump is described for use in a string of tubing extending from the earth's surface into a fluid producing formation comprising: a tubular housing; a packer means sealing the tubular housing realative to the interior of the tubing string; a tubular piston rod of external diameter less than the internal diameter of the tubular housing and slideably received within the tubular housing; top and bottom piston means adjacent the ends of the piston rod slideably and sealably engaging the interior of the tubular housing; and seal means within the tubular housing sealably slideably receiving the piston rod intermediate the piston means; a tubular shift tube slideably and sealably received within the tubular piston rod; a motor driven hydraulic pump affixed to the tubular housing within the well tubing providing a source of hydraulic fluid under pressure, the hydraulic fluid being isolated from the formation fluid; a valve means in communication with the hydraulic pump produced source of fluid pressure and providing means to direct fluid pressure from the pump between first and second fluid flow paths, one of the flow paths acting on the top piston means means to force the piston rod downwardly and the second flow path communicating through the shift tube to act on the bottom piston means to force the piston rod and its piston means upwardly.

• Assignee: NOV; NOV-85-015056; EDB-86-148159
• Patent Number(s): US 4591320
• OSTI ID: 5373336
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
CONTROL
CONTROL EQUIPMENT
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUIDS
HYDRAULIC EQUIPMENT
HYDRAULIC FLUIDS
OIL WELLS
PACKINGS
PIPES
PISTONS
PRESSURE CONTROL
PRESSURE EFFECTS
PUMPS
RESERVOIR FLUIDS
VALVES
WELLS
WORKING FLUIDS