Equipment for oil and
gas industry

+7 (342) 238-61-01

54 Fominskaya str., Perm

DR-178.NGT.4/5.54.M15

Description

PDM DR-178.NGT.4/5.54.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 4/5
PDM length, mm 8 751
Length of stator rubber lining, mm 5 400
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 / З-147
Connecting thread to bits З-117
Maximum density of drilling mud, g/cm3 1,9
Allowed axial load, kN 250
Weight, kg 1 273

 
Power specification

Working fluid flow rate, l/s 30
Output shaft rotation speed:  
- in no-load conditions, RPM 248
Torque at maximum power, kN*m 10
Pressure drop:  
- at maximum power, MPa 13
Power, kW 230
Outline drawing

Comparison
of specifications
Parameter
Technical specification:
Housing OD, mm
Power section lobe configuration
PDM length, mm
Length of stator rubber lining, mm
Length of bearing section up to a curvature point, mm
Diameter of bits used, mm
Connecting thread to drill pipes
Connecting thread to bits
Maximum density of drilling mud, g/cm3
Allowed axial load, kN
Weight, kg
Power specification:
Working fluid flow rate, l/s
Output shaft rotation speed:
- in no-load conditions, RPM
Torque at maximum power, kN*m
Pressure drop:
- at maximum power, MРa
Power, kW

DR-178.NGT.4/5.54.M15
DR-178.NGT.4/5.54.M23

DR-178.NGT.7/8.52.M15
DR-178.NGT.7/8.52.M23

DR-178.NGT.7/8.55.M15
DR-178.NGT.7/8.55.M23

DR-178.NGT.7/8.62.M15
DR-178.NGT.7/8.62.M23

DR-178.NGT.7/8.63.M15
DR-178.NGT.7/8.63.M23

DR-178.NGT.7/8.64.M15
DR-178.NGT.7/8.64.M23

     
178/195 178/195 178/195 178/195 178/195 178/195
4/5 7/8 7/8 7/8 7/8 7/8
8 751 8 511 8 796 9 521 9 671 9 671

5 400

5 210

5 500

6 200

6 360

6 400

1 856 1 856 1 856 1 856 1 856

1 856

212,7-250,8 212,7-250,8 212,7-250,8 212,7-250,8 212,7-250,8 212,7-250,8
З-133/147 З-133/147 З-133/147 З-133/147 З-133/147 З-133/147
З-117 З-117 З-117 З-117 З-117 З-117
1,9 1,9 1,9 1,9 1,9 1,9
250 250 250 250 250 250
1 273 1 239 1 279 1 385 1 309 1 309
     
30 25-40 30 30 20-35 30
           
248  100-160 138  118  102-179  170 
10 13,4 15 15 12,6 14
           
13 13 12 11 13 13
 230 164  161  157  213 211 
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