METHOD FOR DRILLING UNSTABLE CLAYEY DEPOSITIONS IN BORE-HOLE

摘要

FIELD: mining industry. SUBSTANCE: according to method, drilling of clayey depositions is effected with use of water-based drilling fluid containing reagent with binding properties. Used in function of reagent is water solution of water-soluble polyelectrolyte of cationic type of 0.3-1.0% concentration. Used in function of water-based drilling fluid is natural water suspension. Application of aforesaid method allows for avoiding complications connected with destruction of bore-hole walls. Well construction period is also reduced. EFFECT: higher efficiency.