M35 Long-Stack Oil Sealed Bearing Assembly

M35 Long-Stack Oil Sealed Bearing Assembly

M35 Mud Motor
Built to Last

Our oil sealed bearing assemblies are built for ease of use and maintenance, lower service costs and reliable performance in low-to-moderate temperature wells. The WZL M35 oil sealed drilling motor is our next generation offering, featuring a maximized OD, lengthened bearing stack and increased flow area.

  • Bearing packs are isolated from drilling fluid, guarding internal components from debris
  • Oil sealed design and carbide coated parts offer paramount corrosion resistance
  • More fluid directed to bit for enhanced hydraulic efficiency, bottom-hole cleaning, bit life and ROP
  • High weight-on-bit thrust bearing capacity
  • Configurable jetted piston housing ports for optimal bypass

M35 Specifications – Imperial

Swipe sideways to see all columns →
Operating capacityStatic capacity
Nominal motor OD (in)Nominal BA OD (in)Motor seriesBit box to bend (in)Bit box to fixed bend (in)Hole size (in)WOB (lb)Max bit overpull (lb)Torque (ft-lb)Flow rate (gpm)WOB to re-run (lb)Bit overpull to re-run (lb)Body overpull (lb)Torque (ft-lb)
55 ¼M3553436 ⅛ – 7 ⅞54,00021,0009,000450222,000118,000472,00014,000
5 ¼5 ¼M3553436 ⅛ – 7 ⅞54,00021,0009,000450222,000118,000472,00014,000
6 ¾7 ¼M3560478 ½ – 9 ⅞100,00074,00021,000850420,000260,000539,00034,000
77 ¼M3560478 ½ – 9 ⅞100,00074,00021,000850420,000260,000659,00034,000
7 ¼7 ¼M3560478 ½ – 9 ⅞100,00074,00021,000850420,000260,000659,00034,000

Specifications are based on as-new condition and are subject to change without notice. Motor assemblies are available in a multitude of speeds and configurations.

M35 Specifications – Metric

Swipe sideways to see all columns →
Operating capacityStatic capacity
Nominal motor OD (mm)Nominal BA OD (mm)Motor seriesBit box to bend (m)Bit box to fixed bend (m)Hole size (mm)WOB (daN)Max bit overpull (daN)Torque (N·m)Flow rate (lpm)WOB to re-run (daN)Bit overpull to re-run (daN)Body overpull (daN)Torque (N·m)
127133M351.351.09155 – 20024,0009,30012,2001,70098,70052,500210,00019,000
133133M351.351.09155 – 20024,0009,30012,2001,70098,70052,500210,00019,000
171184M351.521.19216 – 25144,50032,90028,5003,200186,800115,600240,00046,100
178184M351.521.19216 – 25144,50032,90028,5003,200186,800115,600293,00046,100
184184M351.521.19216 – 25144,50032,90028,5003,200186,800115,600293,00046,100

Specifications are based on as-new condition and are subject to change without notice. Motor assemblies are available in a multitude of speeds and configurations.

Oil Sealed Bearing Assemblies

As the name suggests, oil sealed bearing assemblies separate moving parts from drilling fluid in a sealed oil-lubricated assembly. This design keeps cuttings and debris out of bearings to improve reliability and reduce service costs.

M41 Mud Lubricated Motor

The M41 is the mud lubricated variation of our newest long-stack bearing assemblies. Check it out if you are looking for maximum operating torques and weight-on-bit loads, or if you plan on drilling in extreme conditions.

Accessories and Customization

Wenzel Downhole Tools M40 mud lubricated bearing assembly with hybrid flex shaft driveline

Different formations, depths and prognoses make a one-size-fits-all approach to drilling tools impossible. Outfit your motor with the housings, driveline, bend and connections that you need for success.

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