Method and apparatus for stabilizing borehole cores

Details Method and apparatus for stabilizing borehole cores Method and apparatus for stabilizing borehole cores

1976-07-19

1978-01-31

Novosad, Stephen J.

Boring or penetrating the earth

Processes

Sampling of earth formations

734252, 175226, E21B 4902, G01N 102

Patent

active

040710998

ABSTRACT:
A method of and apparatus for stabilizing oil well cores taken within rubber sleeve core barrels is provided wherein an unconsolidated and friable columnar mass of earth may be handled without altering the characteristics of its physical structure. A housing is therein provided for receiving a conventional rubber sleeved core sample from a vertically suspended core barrel inside a drilling rig. The housing is adapted for the positioning of the ensleeved core therein and the circulation therearound of a subfreezing mass for the freezing and solidification of the core fluids contained therethrough. Freezing of the core fluids immobilizes rock grains and the like, stabilizing the core sample for handling and second stage stabilization through rigid encasement in a casting medium. The casted core may then be handled in a conventional manner during transportation for subsequent analysis in its original condition.

REFERENCES:
patent: RE20969 (1939-01-01), Reichel
patent: 843314 (1907-02-01), Waters
patent: 2880969 (1959-04-01), Williams
patent: 3012622 (1961-12-01), Austin
patent: 3064742 (1962-11-01), Bridwell
patent: 3091194 (1963-05-01), Dickinson
patent: 3318394 (1967-05-01), Gleason, Jr. et al.
patent: 3447615 (1969-06-01), Schick
patent: 3461192 (1969-08-01), Di Stasio
patent: 3589665 (1971-06-01), Onesti et al.
The Oil and Gas Journal, "Crumbly cores? Dip them in plastic and freeze", May 31, 1965, p. 40.

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