T1-178.NGT.M1 and T2-178.NGT.M1
- Description
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High hydrodynamic alternating loads are created while tripping in a well using 212,7-215,9 mm dia. bits and 195 mm dia. downhole motor due to small annular distance between the well walls and the downhole motor. This leads to reduction of the well wall stability, layer breakage, decrease of well productivity. The turbodrills T1-178.NGT.M1 and T2-178.NGT.M1 of 178 mm OD are offered to increase the annular distance and, therefore, to improve conditions of well drilling with 212,7-215,9 mm bits. The turbodrill is available for drilling with impregnated and PDC bits.
The turbodrill incorporates one (T1-178.NGT.M1) or two (T2-178.NGT.M1) turbine sections and bearing section. High performance turbine made out of stainless steel by precision casting method is used in the turbine sections. The turbine efficiency constitutes 68-70% at max. power. The turbodrill is completed with the bearing section of enhanced operation life exceeding 400 hrs. The turbodrill bearing section operates in mud and has axial sliding bearing, the operating surfaces made of synthetic diamond. This allows reaching high power characteristics and increased overhaul life. - Technical and power
specifications -
Turbodrill specification
Code of turbodrill T1-178.NGT.M1 T2-178.NGT.M1 OD of threaded connections, mm 178 Diameters of bits used, mm 212,7-215,9 Turbodrill length, mm 9 332 13 004 Length of top turbine section, mm - 3 672 Length of bottom turbine section, mm 7 332 7 332 Length of bearing section, mm 2 000 2 000 Length of bearing section, mm З-147 Connecting thread to bit З-117 Max. density of mud, g/cm3 1,9 Max. axial load, kN 150 Weight, kg 2 100 2 500 Max. temperature in well, °C 250
Turbodrill power characteristicQuantity of turbine sections, pc. 1 2 Mud flow rate, l/sec 32-36 25-32 Mud density, g/cm3 1,0 1,0 Stall torque, N*m 2843-3599 2450-4014 Speed of rotation at operating condition, min-1 827-931 646-827 Pressure drop, MPa 5,8-7,4 5,0-8,2 Max. power, kW 107-152 72-151 - Outline drawing
- Comparison
of specifications -
Параметр Quantity of turbine sections, pcs Pressure drop, MPa
Note: turbodrill power characteristics are given at mud density of 1.0 g/cm3 - Download