Directional Drilling Services
Power sections
The power section of a mud motor converts the hydraulic power of high pressure drilling fluid into mechanical power for the drill bit. A power section consists of two components: a helical-shaped rotor and stator. This means the rotational power is provided by a moineau progressing cavity positive displacement mud motor.
The rotors have one less lobe than the stators. Increasing the lobe count of rotor and stator slows down the RPMs and increases the torque output of a drilling motor. Increasing the number of stages of a mud motor linearly increases the power output towards the so-called high-performance power sections segment.
Power sections can be changed upon request to cope with the changing drilling environment and/or application. The 9-5/8” standard and high-performance power sections are interchangeable with both the 11-1/4” and 9-5/8” bearing assemblies from Wenzel and Blackmax. Typically 1:2 Lobe configurations produce relative high speed and low torque, as where a 7:8 Lobe configuration generates low speed and high torque.
The rotors are manufactured from 17-4 PH corrosion-resistant stainless steel. The stator is a section of cold drawn, heat-treated steel pipe with a moulded elastomer compound bonded inside. Elastomer choice includes the standard nitrile for most applications, HSN elastomers for use with more aggressive drilling muds and the aromatic resistant (AR) elastomer providing better resistance to aromatic hydro-carbons.
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Power sections
