Advanced downhole periodic seismic generator

Patent · Tue Jul 16 00:00:00 EDT 1991

OSTI ID:867904

Hardee, Harry C ^[1]; Hills, Richard G ^[2]; Striker, Richard P ^[1]

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1. Albuquerque, NM
2. Las Cruces, NM

An advanced downhole periodic seismic generator system 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.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
• Assignee: Hills, Richard G. (Las Cruces, NM)
• Patent Number(s): US 5031717
• Application Number: 07/312,683
• OSTI ID: 867904
• Country of Publication: United States
• Language: English

Related Subjects

/181/367/
advanced
advanced downhole
apparatus
borehole
cabling
clamping
clamping apparatus
comprises
connected
contains
contains clamping
discrete
discrete frequency
downhole
downhole periodic
earth
earth strata
electrical
electrical cabling
frequency
frequency range
frequency-swept
generator
head
housing
housing operably
operably
operably connected
oscillator
output
periodic
periodic seismic
pneumatic
predominantly
predominantly shear-wave
producing
range
reservoir
seismic
seismic generator
selectively
selectively clamping
self-contained
shear-wave
shear-wave vibration
speed
strata
strata surrounding
support
surrounding
transmitting
transmitting variable
unitary
unitary housing
variable
variable frequency
variable speed
vibration
walls