DR-210.NGT.7/8.42.М1

Description

PDM DR-210.NGT.7/8.42.M1 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
specifications

Technical specification

Housing OD, mm	210
Power section lobe configuration	7/8
PDM length, mm	7 749
Length of stator rubber lining, mm	4 200
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	1 570

 
Power specification

Working fluid flow rate, l/s	22,4-44,2
Output shaft rotation speed:
- in no-load conditions, RPM	69-138
Torque at maximum power, kN*m	13,8
Pressure drop:
- at maximum power, MPa	5,6
Power, kW	179

Outline drawing

Comparison
of specifications

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

Download

	Description and specification of DR-210.NGT.7/8.42.М1 (0.3 MB, pdf)
	28 PDM's performance in the Kazakhstan Republic (0.1 MB, pdf)