Apparatus for pack-off locking of seismic energy source

Details Apparatus for pack-off locking of seismic energy source Apparatus for pack-off locking of seismic energy source

1991-04-11

1992-05-05

Lobo, Ian J.

Acoustics

Geophysical or subsurface exploration

Well logging

367911, 181104, G01V 140

Patent

active

051099462

ABSTRACT:
A pack-off locking means for use in downhole geological seismic work. An upper and lower endcap rigidly connected together by a inelastic vertical member which is adapted to hold a seismic energy source. The endcaps have sealing means attached thereto for isolating a cylindrical section of the well borehole, thus, forming a sealed chamber wherein the seismic energy source contained therein transmits acoustical energy in a mostly horizontal and omni-directional plane into geological formations of interest. Minimal acoustical energy is transmitted into the borehole vertical fluid column because the seal-off means prevents communication thereto. Means for pressurizing the chamber formed by the pack-off means and for measuring the pressure thereof.

REFERENCES:
patent: 2651027 (1953-09-01), Vogel
patent: 3923099 (1975-12-01), Brandon
patent: 4815557 (1989-03-01), Duwe
patent: 4817755 (1989-04-01), Gildas
patent: 4858718 (1989-08-01), Chelminski
patent: 5005666 (1991-04-01), Fairborn

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