Down hole periodic seismic generator

Patent · Tue Feb 21 00:00:00 EST 1989

OSTI ID:6162067

Hardee, H C; Hills, R G; Striker, R P

A down hole periodic seismic generator system is described for transmitting variable frequency, predominantly shear-wave vibration into earth strata surrounding a borehole. The system comprises a unitary housing operably connected to a well head by support and electrical cabling and contains clamping apparatus for selectively clamping the housing to the walls of the borehole. The system further comprises a variable speed pneumatic oscillator and a self-contained pneumatic reservoir for producing a frequency-swept seismic output over a discrete frequency range.

• Assignee: Dept. of Energy, Washington, DC
• Patent Number(s): US 4805727
• OSTI ID: 6162067
• Resource Relation: Patent File Date: Filed date 28 Oct 1982
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
42 ENGINEERING
BOREHOLES
SEISMIC SURVEYS
EQUIPMENT
OSCILLATORS
PNEUMATIC MOTORS
SEISMIC S WAVES
WELLHEADS
CAVITIES
ELECTRONIC EQUIPMENT
GEOPHYSICAL SURVEYS
MOTORS
SEISMIC WAVES
SURVEYS
020200* - Petroleum- Reserves
Geology
& Exploration
420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)