Possibility of ejectors use when drilling wells with mud-pulse washing of their bottoms
The paper presents some information about the possibility of creating and applying of ejector-mud-pulse circulation when drilling wells, which shows that integration of mud-pulses and ejection in the drilling fluid flow can provide conditions for improving drilling performance indicators. The developed scheme of the assemblies of a drill string bottom can be used for large-scale works on the bench and in practice. Creation of conditions to reduce well bottom (comprehensive) pressure produced by the drilling fluid column in the wellbore is the basis of the scheme, which causes slowing of the drilling speed, when the well bottom pressure exceeds the pore pressure of the well bottom rock.