Proven Solution for Torque
WWT Non-Rotating Protectors™ (NRP) reduce rotational friction between the drillstring and the casing by creating a standoff between the two surfaces. The unique, patented inner sleeve geometry allows fluid to flow into the interior of the sleeve. Rotation of the drillpipe draws fluid across the sleeve flats, creating a fluid bearing within the sleeve, reducing rotating friction by 50 to 90% even at low rpms and in almost any drilling or completion fluid. The result is that surface torque is significantly reduced allowing more torque to be distributed to the bit improving drilling performance and the rate of penetration (ROP).
Mud from the annulus flows into the fluid channels on the inside of the sleeve. This fluid is drawn between the rotating drillpipe and the stationary sleeve. The fluid forced between the rotating pipe and the sleeve creates a “fluid cushion” between the two elements, dramatically reducing friction.
The operator had drilled numerous wells using various mud additives, including beads and lubricants. When comparing this offset data with the use of WWT NRPs in a well in the same field with the same profile, the WWT predicted torque using WWT NRPs showed improvement, whereas the actual torque reduction, which averaged 32%, was even more significant.
The operator was drilling a 4,800 m (15,700 ft.) S-shaped well and was concerned with torque as the trend showed that rig capabilities would be exceeded at TD. WWT NRPs were installed in the shallow, high contact areas of the well when they reached 4,269 m (14,006 ft.). As they drilled deeper and WWT NRPs moved into the high friction areas, the torque was reduced approximately 35%.