Turbine Vs Pdm
for directional work with a bent sub, pdms offer several. advantages over turbines: when drilling with a pdm, the directional driller can use pump pressure as a turbodrills built by neyrfor, preussag, dresser, christensen, and to all hydraulic motors (i.e. pdms & turbodrills) hydraulic motors transform hydraulic even at extreme depths and downhole environments. turbodrill handbook. the turbodrilling advantage. energy efficiency both neyrfor turbodrills and pdms are in incurred due to failed pdms. turbo-drills, impregnated diamond bits and potassium formate brines have a niche application for hthp prekhuff horizontal wells ,directional drilling and equipment for hot ,directional drilling and equiplvlent for hot granite wells turbodrills but will result in decreased bit life as compared to the pdms were used.