Equipment for oil and
gas industry

+7 (342) 238-61-01

54 Fominskaya str., Perm

T1-178.NGT.M2 and T2-178.NGT.M2

Description

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.M2 and T2-178.NGT.M2 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.M2) or two (T2-178.NGT.M2) 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.M2 T2-178.NGT.M2
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 characteristic

Quantity of turbine sections, pc. 1 2
Mud flow rate, l/sec 25-28 22-25q
Mud density, g/cm3 1,0 1,0
Stall torque, N*m 2254-2827 2443-3155
Speed of rotation at operating condition, min-1 926-1037 815-926
Pressure drop, MPa 6,4-8,0 6,9-8,9
Max. power, kW 100-140 95-140
Outline drawing

Comparison
of specifications
Параметр
Technical specification:
Dia. of bits used, mm
Length, mm
Connecting thread to drill pipes
to bit
Rage of bend angles, deg
Weight, kg
Power specification:
Quantity of turbine sections, pcs Turbine
Bearing section
Quantity of turbine stages in turbodrill, psc
Mud flow rate, l/sec
Speed of rotation at operating condition, min-1
Stall torque, N*m
Pressure drop, MPa
Max. power, kW
T1-178.NGT.M1 T2-178.NGT.M1 T1-178.NGT.M2 T2-178.NGT.M2 TBS1-178.NGT.M1 TBS1-178.NGT.M2
 
212,7-215,9 212,7-215,9 212,7-215,9 212,7-215,9 212,7-215,9 212,7-215,9
9 332 13 004 9 332 13 004 10 964 10 964
З-147 З-147 З-147 З-147 З-147 З-147
З-117 З-117 З-117 З-117 З-117 З-117
- - - - - -
2 100 2 500 2100 2 500 2100 2 100
 
1 2 1 2 1 1
1 1 1 1 1 1
170 240 150 210 170 150
32-36 25-32 25-28 22-25 32-36 25-28
2843-3599 2450-4014 2254-2827 2443-3155 2843-3599 2254-2827
827-931 646-827 926-1037 815-926 827-931 926-1037
5,8-7,4 5,0-8,2 6,4-8,0 6,9-8,9 5,8-7,4 6,4-8,0
107-152 72-151 100-140 95-140 107-152 100-140


Note: turbodrill power characteristics are given at mud density of 1.0 g/cm3

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