Development of Hydraulic Turbodrills for Deep Well Drilling

The article discusses the possibility of improving design turbine a hydraulic drilling machine for wells in very hard rocks and at considerable depths (5000–12,000 m). analysis results studies on technical technological characteristics downhole motors showed that it is impossible to ensure stable operation due limitation operating temperature, while with an increase flow rate fluid, they do not provide required power spindle shaft, cannot reach high-speed drilling. In such conditions, turbodrills significant change profile stator rotor blades reinforced support unit are most suitable. paper presents invariant mathematical model, which made possible determine optimal geometric parameters based preselected boundary conditions main performance being developed. obtained were tested by finite element method, convergence 12.5%. At same time, zones lowest highest rates identified. Additionally, this comparative TSSH-178T Neyrfor TTT 2 7/8 brands. comparison domestic turbodrill, developed shows 13-fold reduction its length 3-fold torque, provided maximum increased 1.5 times. foreign analog, there decrease 8.5 times, torque 5 6.5