PDM DR-210.NGT.7/8.50.М1 is a new universal hydraulic downhole motor used for drilling of oil and gas wells with rock and PDC bits of 250,8 – 374.6 mm diameter.
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°.
The bearing section has multi-row thrust ball bearing of enhanced load-carrying capacity and radial hard alloy bearings.
PDMs are completed with imported extended power sections with enhanced operation life.
Due to very short shoulder up to the point of axes misalignment (only 1987 mm) the 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 210 Power section lobe configuration 7/8 PDM length, mm 8 549 Length of stator rubber lining, mm 5 040 Length of bearing section up to a curvature point, mm 1 987 Diameter of bits used, mm 250,8-374,6 Connecting thread to drill pipes З-152 Connecting thread to bits З-152 Maximum density of drilling mud, g/cm3 1,9 Allowed axial load, kN 300 Weight, kg 1 730
Working fluid flow rate, l/s 26,3-52,7 Output shaft rotation speed: - in no-load conditions, RPM 121-242 Torque at maximum power, kN*m 16,2 Pressure drop: - at maximum power, MPa 5,6 Power, kW 216
- Outline drawing
Parameter DR-210.NGT.7/8.42.М1 DR-210.NGT.7/8.50.М1 Technical specification: Housing OD, mm 210 210 Power section lobe configuration 7/8 7/8 PDM length, mm 7 749 8 549 Length of stator rubber lining, mm 4 200 5 040 Length of bearing section up to a curvature point, mm 1 987 1 987 Diameter of bits used, mm 250,8-374,6 250,8-374,6 Connecting thread to drill pipes З-152 З-152 Connecting thread to bits З-152 З-152 Maximum density of drilling mud, g/cm3 1,9 1,9 Allowed axial load, kN 300 300 Weight, kg 1 570 1 730 Power specification: Working fluid flow rate, l/s 22,4-44,2 26,3-52,7 Output shaft rotation speed: - in no-load conditions, RPM 69-138 121-242 Torque at maximum power, kN*m 13,8 16,2 Pressure drop: - at maximum power, MРa 5,6 5,6 Power, kW 179 2
Description and specification of DR-210.NGT.7/8.50.М1 (0.3 MB, pdf) 28 PDM's performance in the Kazakhstan Republic (0.1 MB, pdf)