... Abstract Turbodrills have been used in the oil and gas industry since the 1920s. The general characteristics of a turbodrill are higher power, higher rotary speed (revolutions per minute expressed in RPM) and relatively low torque, due to the high RPM. For applications in which diamond...

.... These developments were motivated by an interest in modifying one of the main turbodrill characteristics: high rotational velocity (RPM). The hope was to increase the nominal drive shaft torque, while reducing drive shaft speed. The planned modification hoped to reduce turbodrill output RPM, then ranging between...

... chemistry strength lead slurry drilling fluid property slurry cement column cement pulsation static gel strength rpm cement gel strength prediction upstream oil & gas cement property PETROLEUM SOCIETY CANADIAN INSTITUTE OF MINING, METALLURGY & PETROLEUM PAPER 2002-292 Field Evaluation...

... and mineral content are among the uncontrollable variables. On the other hand, several drilling variables can be selected carefully and drilling rate can be improved significantly. Mud weight (MW), weight on bit (WOB), rotary speed or rotation per minute (RPM), bit type and hydraulics are among...

... under marine environments (Peresich et. al, 1991). drilling fluid selection and formulation rpm rheometer reading molecule isopropyl laureate methyl laureate upstream oil & gas ester drilling fluid system high temperature laureate ester invert emulsion drilling fluid chemistry...