A Rotary Steerable System (RSS) is a new form of drilling technology used in directional drilling. It employs the use of specialized downhole equipment to replace conventional directional tools such as mud motors.They are generally programmed by the MWD engineer or directional driller who transmits commands using surface equipment (typically using either pressure fluctuations in the mud column or variations in the drill string rotation) which the tool understands and gradually steers into the desired direction. In other words, a tool designed to drill directionally with continuous rotation from the surface, eliminating the need to «slide» a mud motor.
Point-the-bit rotary-steerable system provides more precise steering and smoother, cleaner wellbores. Now, There is an expansion of Revolution systems for a full range of hole sizes.
DRILL MORE SIZES OF HIGH-QUALITY, HIGH-ACCURACY BOREHOLES:
That lets you improve your ability to drill high-quality boreholes with optimal control of wellbore trajectory-in intermediate and reservoir sections of the well. This Revolution rotary-steerable systems (RSS) has been expanded to drill a wide range of hole sizes from 6 to 17-1/2 in.
Revolution systems feature point-the-bit technology for drilling smoother, cleaner wellbores by orienting the drill-bit axis with the axis of the hole.Cutting action is kept square on the face of the bit to eliminate inefficient side-cutting forces. This extends bit life, increases drilling efficiency and enhances steering accuracy.
Optimal performance is achieved when the Revolution RSS is combined with HEL MWD (Measurement While Drilling) and Precision LWD systems. Point-the-bit technology uses a near-bit-stabilizer to orient the axis of the drill bit with that of the holes. This technology improves wellbore quality by reducing ledging, spiraling, tortuosity and gauge problems associated with push-the-bit systems.
HOW DOES IT WORK?
The Revolution system’s point-the-bit technology uses a near-bit stabilizer to orient the axis of the drill with that of the hole. Relative rotation between the center shaft (Which carries torque to the bit) and a non-rotating outer housing drive a hydraulic pump. The pump generates the motive force required to deflect the drillstring according to the programmed steering plan.
Sensors mounted on the shaft measure drillstring tool face and deflection. Integration with the HEL MWD system provides bidirectional communication.
A robust insert module houses control electronics and near-bit inclination and gamma ray measurement capabilities. Uplink telemetry is accomplished either by mud pulse, with the HEL MWD system, or by electromagnetic wave, with the Empulse MWD system.