Acid soluble weighting agent for well drilling, workover and com

Details Acid soluble weighting agent for well drilling, workover and com Acid soluble weighting agent for well drilling, workover and com

1980-05-23

1982-06-29

Guynn, Herbert B.

Compositions

Leather or fur treating

252 85M, 252 85P, 252 855R, C09K 704, C09K 706

Patent

active

043371604

ABSTRACT:
A new weighting material for use in controlling the specific gravity of fluids employed in the drilling, completion, perforation and workover of oil and gas wells is disclosed. The material siderite (FeCO.sub.3), has the unique property of being removable from the bottom of well boreholes and producing formation zones by virtue of almost complete solubility in both mineral and organic acids. This weighting material is compatible in both oil and water muds and has a density of 3.8 g/cc which allows formulation of fluid weights up to 19 lbs./gal.

REFERENCES:
patent: 2393166 (1946-01-01), Hoeppel
patent: 2471446 (1949-05-01), Norman
patent: 3622513 (1971-11-01), Miller
patent: 3891565 (1975-06-01), Colpoys
Kirk-Othmer, Encyclopedia of Chemical Technology, _Second. Rev. Ed., vol. 12, 1967, p. 38.
Handbook of Chemistry and Physics, 42 Edition, 1960, pp. 586-589.

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