Venture Chemicals, Inc.

Jerry R Rayborn

Jack C Cowan

Tommy Thrash

The invention provides well-working fluid compositions containing certain hydrophobic organophilic water wettable fibrous materials to decrease the seepage loss of the fluid to subterranean formations in which the fluid is being used. Also disclosed is a process of reducing the seepage loss of well working fluids utilizing such fibrous materials.

Well working compositions, method of decreasing the seepage loss from

Disclosed is a fine particle size hydrophobic organophilic water wettable cotton and its use as a seepage control additive in well-working fluids. Also disclosed is a process of preparing this additive which comprises reacting raw cotton, which contains its natural oils and waxes, with dry hydrochloric acid gas.

Provided is a method of reducing the torque required to rotate the drill string in a rotary well drilling process which comprises adding to the drilling fluid which is being circulated in the wellbore a liquid organic lubricant and a hydrophobic, organophilic, water wettable sorbent. The sorbent preferentially sorbs the lubricant and deposits it in the wall cake on the sides of the borehole thus making it available for lubricating the drill string.

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New Orleans, LA, United States of America

Jerry R Rayborn