Bearing section S-178.NGT.M23 is a new short bearing section featuring enhanced overhaul period of around 350 hours.
The bearing section is used in PDM power sections of 172 – 178 mm diameter and for drilling oil and gas wells with 212,5 - 250,8 mm bits.
The bearing section is fitted with the axial sliding bearing, having operating surfaces made of synthetic diamond, and the radial hard alloy bearings.
The bearing section is furnished with drive shaft with two joints to connect to the power section rotor. The bearing section design has adjustable bent sub. The adjustment range is from 0° up to 2° or from 0° up to 3°.
Meeting customers' requirements, the bearing section can be produced with the connecting threads for specific power section.
Top sub (safety sub), also replaceable centralizer and calibrator sub are available with the bearing section to connect the power section to drill pipes:
- Technical specification
Housing OD, mm 178 Bearing section length, mm 2 546 Bearing section length to curvature plane, mm 1 856 Range of angle adjuster change, degree 0-2 or 0-3 Connecting thread to bit З-117 Torque transmitted, max. kN*m 24 Tolerance of axial loading, kN 250 Overhaul period, hour 350
- Outline drawing
Parameter Housing OD, mm Bearing section length, mm Bearing section length to curvature plane, mm Range of angle adjuster change, degree Connecting thread to bit Torque transmitted, max. kN*m Tolerance of axial loading, kN Overhaul period, hour S-178.NGT.M12
S-178.NGT.M16 S-178.NGT.M23 178 178 178 2 546 2 587 2 546 1 856 1 897 1 856 0-2 or 0-3 0-2 or 0-3 0-2 or 0-3 З-117 З-117 З-117 24 24 24 250 250 250 280 280 350
Description and specification of S-178.NGT.M23 (0.2 MB, pdf)