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Oil base drilling fluids (US Patent 2,995,514, 1961)

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John W. Jordan, Richard E. Offeman and Donald J. Weintritt received US Patent No. 2,995,514 on August 8, 1961, filed April 29, 1957. It was assigned to Nat Lead Co.

The patent's description opens:

This invention relates to drilling fluids, particularly oilbase drilling fluids as used in the rotary method of drilling oil and gas wells.

Author
John W. Jordan; Richard E. Offeman; Donald J. Weintritt
Published by
US Patent Office
Series
US Patent No. 2,995,514
Date
August 8, 1961
Library no.
ACL Doc 23248 · asbestosclaims.law/library/23248
Rights
US government work, in the public domain.

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John W. Jordan, Richard E. Offeman, Donald J. Weintritt. “Oil base drilling fluids (US Patent 2,995,514, 1961).” August 8, 1961. US Patent No. 2,995,514. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23248. https://asbestosclaims.law/library/23248.

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