Additive composition for release of stuck drill pipe

C - Chemistry – Metallurgy – 07 – C

Patent

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31/32, 260/636.3

C07C 43/13 (2006.01) C08G 65/26 (2006.01) C09K 8/02 (2006.01) E21B 31/03 (2006.01)

Patent

CA 1205823

ABSTRACT OF THE DISCLOSURE An additive composition effective in the release of stuck pipe in a borehole during a drilling operation which composition contains propoxylated C18-C32 alkanols, an oil-soluble emulsifier-wetting agent and a liquid hydro- carbon diluent.

400720

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