Cable suspended submergible pumping system with safety valve

Patent · Tue Nov 11 04:00:00 EST 1986

OSTI ID:6975093

Brookbank, E B

This patent describes a cable suspended pumping system comprising a downhole pumping unit including a submergible pump and an electric motor for driving the pump, cable means for suspending the pumping unit downhole and having one end provided with means for connection to the pumping unit and an opposite end provided with means for connection to a wellhead. The cable means includes a weight-bearing portion and an electric current conducting portion. The pumping system also includes a pack-off assembly including a packer and a tube extending therethrough and sealed therein, the packer being adapted to divide a well into an upper region and a lower region. The tube has a perforated lower portion and a perforated upper portion, whereby pumped fluid may enter the tube at the lower region, pass through the packer via the tube, and exit the tube at the upper region. A subsurface safety valve in the tube has a safety valve operating line extending from the safety valve to the wellhead, whereby a flow passage through the tube may be opened and closed at will independent of the operation of the pump. The system has a means for electrically connecting a section of the electrical conductor portion of the cable means that is above the packer to a section of the electrical conductor portion of the cable means that is below the packer. The section of the cable means that is above the packer is substantially shorter than the section that is below the packer so that the subsurface safety valve is readily accessible from the wellhead.

• Assignee: TRW, Inc., Cleveland, OH
• Patent Number(s): US 4621689
• OSTI ID: 6975093
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
CABLES
CONTROL EQUIPMENT
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CONDUCTORS
ELECTRIC CURRENTS
ELECTRIC MOTORS
ELECTRICAL PROPERTIES
EQUIPMENT
FLOW REGULATORS
MOTORS
OIL WELLS
PACKINGS
PHYSICAL PROPERTIES
PUMPING
PUMPS
RELIEF VALVES
VALVES
WELLHEADS
WELLS