SOLID PHASE-FREE DRILLING MUD WITH IMPROVED LUBRICANT PROPERTIES Russian patent published in 2006 - IPC C09K8/08 

FIELD: drilling fluids.

SUBSTANCE: invention relates to drilling of petroleum and gaseous holes, in particular, to drilling mud. The solid phase-free drilling mud comprises the following components, wt.-%: carboxymethylcellulose as a filtration reducing agent, 0.8-1.2; sodium chloride (NaCl) as an inhibiting and weighting additive, 5.0-25.0; xanthane biopolymer Kem X as a cross-linking agent, 0.3-0.4; lubricating additives "BIOLUB LVL" and "GLITAL", 0.1-0.2, and water, the balance. Invention provides preparing ecologically low danger, cold-resistant, low-component composition of solid phase-free drilling mud used in opening productive beds, among them, horizontal holes and possessing high retaining and taking out capacity and improved lubricating capacity also.

EFFECT: improved and valuable technical properties of drilling fluid.

3 ex