US 7,320,951 B2
Silica-based drilling mud comprising glycoside lubricants with amino-linked alkyl chains
Michele Scott Albrecht, Houston, Tex. (US); Kenneth Michael Cowan, Sugar Land, Tex. (US); Robert Irving McNeil, III, Cypress, Tex. (US); Eric Van Oort, Houston, Tex. (US); and Ronald Lee Rock, Sr., Richmond, Tex. (US)
Assigned to Shell Oil Company, Houston, Tex. (US)
Appl. No. 10/257,824
PCT Filed Apr. 19, 2001, PCT No. PCT/EP01/04496
§ 371(c)(1), (2), (4) Date Oct. 17, 2002,
PCT Pub. No. WO01/81498, PCT Pub. Date Nov. 01, 2001.
Prior Publication US 2003/0092579 A1, May 15, 2003
Int. Cl. C09K 8/20 (2006.01); C09K 8/08 (2006.01); E21B 43/16 (2006.01)
U.S. Cl. 507—111  [507/110; 507/212; 507/209; 166/305.1] 8 Claims
 
1. A drilling mud with a lowered coefficient of friction comprising a silicate-based mud and a lubricant selected from the group consisting of glycosides; wherein the lubricant is a glucoside selected from monosaccharides and olisaccharides having 2 to 4 saccharide groups; and wherein the glucoside comprises branched or unbranched alkyl chains of any length linked by amino linkages to any position of any ring.