Necessity to solve rotary drilling efficiency improvement problems was
acknowledged. With this respect, usage of shock absorbers and vibrati
on dampers is suggested. Experimental work included testing hydrodynam
ic above-bit GNAD-type shock absorbers while deep production and explo
ratory drilling by PO Aktyubinskneft and PGO Atyrauneftegazgeologiya.
Operating experience with imported pumps in NGDU Priazovneft fields