M9 RSS-Optimized, Oil Sealed Mud Motor Bearing Assembly

M6 Short Bit-to-Bend Oil Sealed Bearing Assembly

M9 Mud Motor Bearing Assembly
RSS-Optimized Engineering, Oil Sealed Reliability

Optimized Flow for Optimal Lubrication and Control

Much like our M42 mud lubricated motor, the M9 zero-bypass oil sealed bearing assembly was designed specifically with RSS applications in mind. 

The M9 design incorporates a secondary oil sealed isolation chamber that separates bore pressure from annular pressure. This allows the main bearing assembly oil seal chamber to be balanced with annular pressure, greatly increasing downhole reliability.

Meanwhile, 100% of the drilling fluid flows through the M9 is sent through the drill bit without loss, providing maximized bit hydraulics and cleaning. 

Restricted Flow Motors for RSS Applications

If the M9 zero bypass motor does not fit your RSS needs, consider our oil sealed drilling motors. The restricted bypass feature of our M5 and M6 oil sealed drilling motors gives you full control over the amount of fluid flowing to your rotary steerable system and bit. 

Bypassed mud flow can be limited with the use of specially designed jetted plugs, which reduce the restricted flow area of the piston housing ports. This allows optimal fluid to flow to the RSS and prevents wash within the assembly due to increased flow velocity. 

Specifications (Imperial)

Clean corrosion resistance
  • Oil sealed bearing assembly keeps drilling fluid and debris out of internal components
  • Low-alloy steel construction
  • Tungsten-carbide corrosion resistant coatings
  • Titanium driveshaft and all-metal power section options further safeguard motor from harsh chemicals
Failsafe design
  • Enhanced output mandrel incorporates bending stress relief and internal safety catch
  • Flow restrictor design and location reduces risk of mandrel connection deformation
Upgrade existing M5 inventory
  • Owners of the M5 can benefit from the enhanced features of the M6 with our M5+ upgrade package
  • Contact us for complete details

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Operating capacityStatic capacity
Power section (in)Nominal BA OD (in)Bit box to stator (ft)Hole size (in)Standard bit box thread (API)Max WOB (lb)Max bit overpull (lb)Max WOB to re-run (lb)Max bit overpull to re-run (lb)Absolute body overpull (lb)
4 ¾5 ½9.65 ⅞ – 7 ⅞3.5 IF Pin54,00025,000222,000108,000436,000
55 ½9.65 ⅞ – 7 ⅞3.5 IF Pin54,00025,000222,000108,000481,000

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.

Specifications (Metric)

Swipe sideways to see all columns →

Operating capacityStatic capacity
Power section (mm)Nominal BA OD (mm)Bit box to stator (m)Hole size (mm)Standard bit box thread (API)Max WOB (daN)Max bit overpull (daN)Max WOB to re-run (daN)Max bit overpull to re-run (daN)Absolute body overpull (daN)
1211402.9149 – 2003.5 IF Pin24,00011,10098,70048,000194,000
1271402.9149 – 2003.5 IF Pin24,00011,10098,70048,000214,000

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.

Rotary Steerable System Motors

Optimize drilling efficiency, chase faster ROPs and drill confidently with motors specifically designed to get the most out of your Rotary Steerable System (RSS) technology—and ensure your RSS always returns safely.

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.

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.

Contact Us

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