Equipment for oil and
gas industry

+7 (342) 238-61-01

54 Fominskaya str., Perm

DO-76.NGT.4/5.20.М1

Description

PDM DO-76.NGT.4/5.20.M1 is a new universal hydraulic downhole motor used for:

  • drilling of oil and gas wells with 83,0-98,4 mm bits,
  • well reconstruction by sidetracking with rock bits, PDC bits, including bicentric ones;
  • well workover operations.

A rigid bent sub is placed between bearing section and power section.

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 810 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 76/79
Power section lobe configuration 4/5
PDM length, mm 3 565
Length of stator rubber lining, mm 2 000
Length of bearing section up to a curvature point, mm 810
Diameter of bits used, mm 83,0-98,4
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 25
Weight, kg 94

 
Power specification

Working fluid flow rate, l/s 3-5
Output shaft rotation speed:  
- in no-load conditions, RPM 240-396
Torque at maximum power, kN*m 0,6-0,8
Pressure drop:  
- at maximum power, MPa  8-10
Power, kW 11-25
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
D-76.NGT.4/5.20.M1 DO-76.NGT.4/5.20.M1 DR-76.NGT.4/5.20.M2
 
76 76/79 76/80
4/5 4/5 4/5
3 565 3 565 3 646
2 000 2 000 2 000
- 810 855
83,0-98,4 83,0-98,4 83,0-98,4
З-66 З-66 З-66
З-66 З-66 З-66
1,6 1,6 1,6
25 25 45
94 94 97
   
3-5 3-5 3-5
     
240-396 240-396 240-396
0,6-0,8 0,6-0,8 0,6-0,8
     
8-10 8-10 8-10
11-25 11-25 11-25
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