Process for drilling a well

Details Process for drilling a well Process for drilling a well

E - Fixed Constructions

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B

255/25

E21B 21/00 (2006.01) C09K 8/08 (2006.01)

Patent

CA 1232900

K 9626 A B S T R A C T PROCESS FOR DRILLING A WELL A process for drilling a well in an underground formation in which process a drilling fluid is circulated in said well. The drilling fluid contains a hetero polysaccharide which has been obtained by cultivation of Pseudomonas sp. NCIB 11592. By this process a better efficiency is obtained. FJRH04

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