DR-178.NGT.7/8.63.M15
- Description
-
PDM DR-178.NGT.7/8.63.M15 is a new universal hydraulic downhole motor used for drilling of oil and gas wells with rock and PDC bits of 212.7 - 250.8 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 1856 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 280 hrs.
PDMs can be completed with replaceable centralizer and calibrator sub:
Calibrator sub
Centralizer - Technical and power
specifications -
Technical specification
Housing OD, mm 178/195 Power section lobe configuration 7/8 PDM length, mm 9 671 Length of stator rubber lining, mm 6 360 Length of bearing section up to a curvature point, mm 1 856 Diameter of bits used, mm 212,7-250,8 Connecting thread to drill pipes З-133/147 Connecting thread to bits З-117 Maximum density of drilling mud, g/cm3 1,9 Allowed axial load, kN 250 Weight, kg 1 309
Power specificationWorking fluid flow rate, l/s 20-35 Output shaft rotation speed: - in no-load conditions, RPM 102-179 Torque at maximum power, kN*m 12,6 Pressure drop: - at maximum power, MPa 13 Power, kW 213 - Outline drawing
- Comparison
of specifications -
Parameter - at maximum power, MРa - Download
-
Description and specification of DR-178.NGT.7/8.63.M15 (0.2 MB, pdf) 28 PDM's performance in the Kazakhstan Republic (0.1 MB, pdf)