Well data telemetry by explosions

Patent · Tue Jan 03 04:00:00 EST 1978

OSTI ID:5169388

Patchett, J G; Hadley, C F

A data telemetry system is described for use in a plugged exploratory borehole to transmit measurements of subsurface conditions after long delays by use of seismic waves. The system includes a sensor for detecting a downhole condition, such as temperature, and converting it to electrical signals, a timer, and a series of explosive charges. The timer detonates a first of the charges at a preselected time delay and a second charge at a further time delay corresponding to the electrical output of the sensor. The seismic waves generated by the explosions are detected by a seismometer on the earth's surface near the exploratory borehole.

• Assignee: Standard Oil Co. (Indiana)
• Patent Number(s): US 4066994
• OSTI ID: 5169388
• Country of Publication: United States
• Language: English

Related Subjects

440400* -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
ACOUSTIC MONITORING
BOREHOLES
CAVITIES
CHEMICAL EXPLOSIONS
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
EQUIPMENT
EXPLOSIONS
MEASURING INSTRUMENTS
MONITORING
RELAYS
SEISMIC DETECTORS
SEISMIC SOURCES
SEISMOGRAPHS
SONIC LOGGING
TIMING CIRCUITS
UNDERGROUND EXPLOSIONS
WELL LOGGING