Discover more about what Taurex has to offer by reading
about our other roller cone drill bits.
The Motor Drive series are high-speed drill bits used for downhole power drilling tools. These bits integrate advanced cutting structures and gauge protection technology, reliable bearing system, and a hydraulic structure designed for greater efficiency in high speed drilling applications. The combination of these advanced designs decreases the common problems of conventional bits in directional and horizontal drilling, such as cone shell erosion, premature bearing failure, and low ROP. MD series bits are the ideal choice for directional, horizontal, and high temperature drilling. The floating bearing design reduces the relative linear speed of the bearing couple and decreases temperature rise on friction surfaces. The floating elements are made of highly elastic materials with high temperature and abrasion resistance. This design increases bearing life and reliability in high WOB or high RPM applications. High precision metal rings are used to form the bearing axial dynamic seal. Two elastic rubber energizers are separately located in the head and cone sealing areas to form a static seal. This type of seal reduces the friction force on the sealing surfaces by 70% to 80%. With the reduction of the friction heat and friction force, compared with the conventional rubber seal bits, the average working life (total drilling hours) can be increased by 35%. *Note: MD Series Bits are also available with the O-ring sealing system in place of the Metal Face Seal. Secondary cutter technology is the addition of a secondary row of cutters between primary rows of cutters, forming a special cutting structure with twin bottom hole break lines. This design significantly reduces cone shell erosion in directional and horizontal applications. By examining the protrusion, tungsten grade, and overall shape of the compacts, the JZ engineers have designed the MD Series Bits with compacts that are optimal for high ROP in soft to medium hard formations. This design also effectively prevents cutter breakage in transitional zones. The hardfacing on the shirttail is reinforced and covers a larger area for better protection of the sealing area. Compacts are fitted in shanks with a certain exposure to reduce wear on bit head and grease reservoir area. In addition, the gauge protection is reinforced by utilizing double rows of buttons on the gauge rows of the cone. Fill out the form below to download a sample of our MD Stat Sheet.
Roller Cones
MD Series
Learn More
MD Series Key Advantages
BEARING
SYSTEM
ADOPTING THE FLOATING BEARING STRUCTURE
IMPLEMENTING THE METAL FACE SEAL (MFS)
CUTTING
STRUCTURE
SECONDARY CUTTER TECHNOLOGY
COMPACT TECHNOLOGY
GAUGE
PROTECTION
MD SERIES BITS COME WITH AN ENHANCED GAUGE PROTECTION PACKAGE
Stat Sheet
