ANALYTICAL STUDY OF ROCK STRENGTH IN THE COURSE OF PDC DRILLING.
Borisov, Konstantin I. – Dr.Tech.Sci., senior lecturer, drilling department, скважин of the Institute of Mineral Resources, State Tomsk Polytechnic University, kibor@tomline.ru kibor@tomline.ru

УДК 622.243.2
Key words: combinations: cutting formations by PDC cutters, temporary dependence of formation hardness, limit strength function of formations.
Practical and analytical questions of the time dependence of the strength properties of rocks in the development of new scientific methods of evaluating the properties and performance of dynamic fracture of formationsby modern cutting tools PDC are stated. Scientific interpretation of experimental and settlement data of various authors is given according to influence of time of action of ultimate loads on their size and overall performance of PDC cutters. Consideration of temporary function of durability of formations for an assessment of their behavior is offered during the work of PDC drill bits.

ANALYTICAL STUDY OF ROCK STRENGTH IN THE COURSE OF PDC DRILLING.
Borisov, Konstantin I. – Dr.Tech.Sci., senior lecturer, drilling department, скважин of the Institute of Mineral Resources, State Tomsk Polytechnic University, kibor@tomline.ru

Key words: combinations: cutting formations by PDC cutters, temporary dependence of formation hardness, limit strength function of formations.
Practical and analytical questions of the time dependence of the strength properties of rocks in the development of new scientific methods of evaluating the properties and performance of dynamic fracture of formationsby modern cutting tools PDC are stated. Scientific interpretation of experimental and settlement data of various authors is given according to influence of time of action of ultimate loads on their size and overall performance of PDC cutters. Consideration of temporary function of durability of formations for an assessment of their behavior is offered during the work of PDC drill bits.