Method and apparatus for determining physical integrity of geolo

Details Method and apparatus for determining physical integrity of geolo Method and apparatus for determining physical integrity of geolo

1989-01-23

1989-08-01

Levy, Stewart J.

Measuring and testing

Borehole or drilling

Downhole test

73866, E21B 4900

Patent

active

048524000

ABSTRACT:
A method and apparatus for determining the physical integrity of geological shales and for simulating the environment experienced by geological strata comprising forming a test specimen of the stratum to be measured; immersing the specimen in a drilling fluid, or a mixture of drilling fluids, for a predetermined length of time; spinning the test specimen while immersed up to a predetermined speed while adjusting the temperature of the fluid; and then physically measuring the specimen for disintegration, liquid absorption, and hardness. The apparatus for simulating the environment experienced by geological strata includes means for immersing the specimen in the drilling fluid which comprises a nail having the specimen attached to the shank adjacent the head to hold the specimen inverted below the surface of the drilling fluid.

REFERENCES:
patent: 2963642 (1960-12-01), Arbogast et al.
patent: 3646997 (1972-03-01), Chenevert
patent: 3791222 (1974-02-01), Goodhart et al.
patent: 3802272 (1974-04-01), Bischoff et al.
patent: 4359901 (1982-11-01), Bates et al.
G. m .Bol, "The Effect of Various Polymers and Salts on Boreholes and Cutting Stability in Water-Base Shale Drilling Fluids", Paper Presented at the 1986 IADC/SPE Drilling Conference, Dallas, Texas, Feb. 10-12, 1986.

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