Technical means for efficiency improvement of drill cuttings hydrotransport while drilling inclined and horizontal wellbores
The article discusses some technical devices used in the composition of a drill casing string to retard the drill cuttings settling or to return them back from a well wall or from stagnant zones into the upward flow of flushing water (special drill pipes, circulating subs, oscillator-turbulizer, rotating turbulizer) as well as a purification technology of inclined and horizontal parts of a wellbore from drill cuttings by means of reverse circulation of flushing water.