Parameter telemetering from the bottom of a deep borehole

Patent · Tue Oct 28 04:00:00 EST 1986

OSTI ID:7256291

Farque, C A

This patent describes an apparatus for pumping a liquid from a borehold in the earth. The apparatus includes at least a string of tubing from the surface to a selected depth in the borehole, electric motor means and pump means supported at the bottom end of the tubing, and alternating current electrical power supply means at the surface, of a first selected frequency and a multiple conductor cable that is subject to varying resistance or insulation leakage. The cable connects to the power supply means at the surface end, and to the motor means at the bottom end of the cable. The apparatus comprises: (a) means at the surface for generating an intermediate frequency signal; (b) electrical coupling means at the surface for connecting the intermediate frequency signal between at least one conductor in the cable and ground; and (c) downhole instrument package means positioned in the borehole and connected to the at least one conductor and ground, the downhole instrument package means including.

• Assignee: Oil Dynamics, Inc., Tulsa, OK
• Patent Number(s): US 4620189
• OSTI ID: 7256291
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALTERNATING CURRENT
BOREHOLES
CABLES
CAVITIES
COMMUNICATIONS
CONDUCTOR DEVICES
CURRENTS
DATA TRANSMISSION
DEPTH
DESIGN
DIMENSIONS
DRILL PIPES
DRILLING EQUIPMENT
ELECTRIC CABLES
ELECTRIC CONDUCTIVITY
ELECTRIC CONDUCTORS
ELECTRIC CURRENTS
ELECTRIC MOTORS
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATION
ELECTRICAL PROPERTIES
ELECTRONIC EQUIPMENT
EQUIPMENT
FREQUENCY RANGE
FREQUENCY SELECTION
KHZ RANGE
KHZ RANGE 100-1000
LEAKAGE CURRENT
MOTORS
MWD SYSTEMS
OIL WELLS
PHYSICAL PROPERTIES
PIPES
POSITIONING
POWER SUPPLIES
PUMPS
SIGNALS
TELEMETRY
WELLS