Equipment for oil and
gas industry

+7 (342) 238-61-01

54 Fominskaya str., Perm

DR-88.NGT.5/6.20.М1

Description

PDM DR-88.NGT.5/6.20.M1 is a new universal hydraulic downhole motor used for:

  • drilling of oil and gas wells with 98.4 – 120.6 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 1025 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 3M glue, and each motor is complete 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 88
Power section lobe configuration 5/6
PDM length, mm 3 845
Length of stator rubber lining, mm 2 000
Length of bearing section up to a curvature point, mm 1 025
Diameter of bits used, mm 98,4-120,6
Connecting thread to drill pipes З-66
Connecting thread to bits З-66
Maximum density of drilling mud, g/cm3 1,6
Allowed axial load, kN 50
Weight, kg 137

 
Power specification

Working fluid flow rate, l/s 5-7
Output shaft rotation speed:  
- in no-load conditions, RPM 270-400
Torque at maximum power, kN*m 1,1-1,3
Pressure drop:  
- at maximum power, MPa 10-13
Power, kW 27-43
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-88.NGT.5/6.20.M1 DR-88.NGT.5/6.24.M1 DR-88.NGT.7/8.27.M1
 
88 88/89 88/89
5/6 5/6 7/8
3 845 4 245 4 581
2 000 2 400 2 736
1 025 1 025 1 025
98,4-120,6 98,4-120,6 98,4-120,6
З-66 З-66 З-66
З-66 З-66 З-66
1,6 1,6 1,6
50 50 50
137 151 162
   
5-7 4,3-12,8 2,8-8,2
     
270-400 108-325 74-215
1,1-1,3 1,53 1,34
     
10-13 4,5 4,3
27-43 47 28
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