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

Download

Description and specification of DO-76.NGT.4/5.20.М1 (0.2 MB, pdf)