C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 8/22 (2006.01) C09K 8/02 (2006.01) C09K 8/12 (2006.01) E21B 31/03 (2006.01) C09K 7/02 (1990.01)
Patent
CA 2088480
- 40 - 2558B Title: A METHOD OF DRILLING AND AQUEOUS SYSTEMS USED THEREIN ABSTRACT OF THE INVENTION The present invention relates to a method com- prising the steps of introducing into a well borehole a composition, comprising water and an amount, sufficient to reduce drilling torque, prevent sticking or twisting of a pipe during drilling, or release a stuck pipe in a well borehole, of (A) at least one reaction product of (A-1) at least one hydrocarbyl-substituted carboxylic acylating agent and (A-2) at least one amine-terminated polyoxyalkyl- ene having a number average molecular weight from about 600 to about 10,000, or at least one salt of the reaction product, and drilling the well borehole. Drilling torque, twisting and sticking of the pipe during drilling and releasing of stuck pipe in a well borehole are all effec- tively controlled by the methods and compositions of the present invention.
Forsberg John Wesley
Jahnke Richard William
Ridout & Maybee Llp
The Lubrizol Corporation
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