Downhole telemetry apparatus and method
Patent
·
OSTI ID:6070099
A downhole drillstring signal transmitting system is described which consists of: (a) first and second electrically conductive sleeves adapted to form a section of a drillstring, (b) means holding the sleeves in axial alignment with their adjacent ends separated from each other by a predetermined insulative gap, (c) an insulating means separating the sleeve ends across the gap, (d) an amplifier for amplifying a first frequency electrical signal containing downhole information to be transmitted to the surface, the first signal having a frequency which is suitable for effective propagation through the earth from the downhole location to the surface; (e) means for applying the third signal across the sleeves for transmission to the surface.
- Assignee:
- NOV; EDB-87-167808; NOV-87-079437
- Patent Number(s):
- US 4691203
- OSTI ID:
- 6070099
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ALIGNMENT
AMPLIFIERS
COMMUNICATIONS
DATA TRANSMISSION
DATA TRANSMISSION SYSTEMS
DRILL BITS
DRILL PIPES
DRILLING EQUIPMENT
ELECTRIC CONDUCTIVITY
ELECTRIC IMPEDANCE
ELECTRICAL INSULATION
ELECTRICAL PROPERTIES
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
FREQUENCY DEPENDENCE
IMPEDANCE
NATURAL GAS WELLS
OIL WELLS
PHYSICAL PROPERTIES
PIPES
SLEEVES
TELEMETRY
WELLS
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ALIGNMENT
AMPLIFIERS
COMMUNICATIONS
DATA TRANSMISSION
DATA TRANSMISSION SYSTEMS
DRILL BITS
DRILL PIPES
DRILLING EQUIPMENT
ELECTRIC CONDUCTIVITY
ELECTRIC IMPEDANCE
ELECTRICAL INSULATION
ELECTRICAL PROPERTIES
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
FREQUENCY DEPENDENCE
IMPEDANCE
NATURAL GAS WELLS
OIL WELLS
PHYSICAL PROPERTIES
PIPES
SLEEVES
TELEMETRY
WELLS