PDM DR-120.NGT.7/8.59.М2 is a new universal hydraulic downhole motor used for:
- drilling of oil and gas wells with 139.7 – 165.1 mm bits,
- well reconstruction by sidetracking with rock bits, PDC bits, including bicentric ones;
- well workover operations.
An adjustable bent sub is placed between bearing section and power section. The adjustment range is between 0° and 2° or between 0° and 3°.
Bearing section has axial multi-row rolling bearing and radial hard alloy bearings. Due to a very short shoulder up to the point of axes misalignment (only 1370 mm) drillers can:
- perform tripping without significant pressing of a bit to internal walls in the production string;
- perform sidetracking of complex profile where it is required to alternate deviated intervals of more than 5°/10 m built rate and stabilization intervals with rotation of a drill string without the assembly tripping-out to replace the bend angle.
- minimize risk of leaving the motor parts in the well, as all the threads are screwed applying Loctite glue, and each motor is completed with safety sub.
- do a large volume of work with one motor (it is especially important for hard-to-reach regions) as the overhaul life reaches approximately 200 hrs.
- Technical and power
Housing OD, mm 120 Power section lobe configuration 7/8 PDM length, mm 8 237 Length of stator rubber lining, mm 5 900 Length of bearing section up to a curvature point, mm 1 370 Diameter of bits used, mm 139,7-165,1 Connecting thread to drill pipes З-102 Connecting thread to bits З-88 Maximum density of drilling mud, g/cm3 1,6 Allowed axial load, kN 100 Weight, kg 545
Working fluid flow rate, l/s 12-25 Output shaft rotation speed: - in no-load conditions, RPM 130-261 Torque at maximum power, kN*m 5,3 Pressure drop: - at maximum power, MPa 5,2-7,3 Power, kW 122
- Outline drawing
Parameter DR-120.NGT.6/7.30.М2 DR-120.NGT.7/8.59.М2 Technical specification: Housing OD, mm 120 120 Power section lobe configuration 6/7 7/8 PDM length, mm 5 407 8 237 Length of stator rubber lining, mm 3 000 5 900 Length of bearing section up to a curvature point, mm 1 370 1 370 Diameter of bits used, mm 139,7-165,1 139,7-165,1 Connecting thread to drill pipes З-102 З-102 Connecting thread to bits З-88 З-88 Maximum density of drilling mud, g/cm3 1,6 1,6 Allowed axial load, kN 100 100 Weight, kg 358 545 Power specification: Working fluid flow rate, l/s 10-20 12-25 Output shaft rotation speed: - in no-load conditions, RPM 162-324 130-261 Torque at maximum power, kN*m 4,7 5,3 Pressure drop: - at maximum power, MРa 9,0-13,5 5,2-7,3 Power, kW 101 1
Description and specification of DR-120.NGT.7/8.59.М2 (0.3 MB, pdf)