Rotary-Steerable Systems


Rotary-Steerable Systems Bias Unit Graphic

To get the most out of your assets, you need to get creative with well plans that employ vertical, curve, and lateral sections to maximize reservoir exposure. Because rig time is a huge factor in drilling economics, particularly in offshore and unconventional fields, you also need to execute these multifaceted wellbores efficiently and produce a well that is stable and ready to complete. Economically meeting today's drilling challenges requires reliable, versatile technology.

The Weatherford Revolution® rotary-steerable system (RSS) provides industry-leading capabilities for diverse directional drilling applications, including high-temperature/high-pressure (HTHP) and high-dogleg wells. Our point-the-bit technology delivers clean, accurately placed, and completion-ready wellbores. With an autopilot function that maintains your drilling parameters, plus the ability to make real-time adjustments, you can confidently steer from vertical to horizontal in a single run.

Rotary-Steerable Systems Tool in use

Reliably reach target depth with speed and control.

With a suite of technologies suited for different applications and hole sizes, the Revolution rotary-steerable system can enhance the efficiency of drilling operations in a variety of conditions. The precise point-the-bit design boosts rate of penetration (ROP) and creates a clean, in-gauge wellbore that is easy to complete.

The Revolution suite harnesses advanced technologies to improve performance in HTHP and high-dogleg applications.

The Revolution Heat features HTHP-optimized hydraulics for enhanced reliability in challenging fields, and the Revolution 16 can build curves at a rate of 16°/100 ft (30 m) to enable deeper kickoffs and greater reservoir exposure. For cost-sensitive operations, the Revolution SRT provides efficient directional drilling using an innovative technique to control bit speed through modulated mud flow.

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We developed the proprietary technologies integrated into the Revolution suite at our state-of-the-art facility in Tewkesbury, England.

The facility reproduces extreme environmental conditions including temperature, pressure, vibration, torque, and—uniquely—backward whirl. As a result of our research on backward whirl, the Revolution rotary-steerable system includes real-time whirl sensors. Other on-board technologies include the TVM™ 2+ sensor, featuring our award-winning angular-rate gyroscope, which measures high-speed downhole rotation and helps to determine the type and severity of torsional vibration phenomena.

Enhance efficiency, reliability, ROP, and hole quality with the Revolution suite of rotary-steerable drilling solutions.

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Available Rotary-Steerable Technologies

Revolution® Core

High-efficiency, point-the-bit drilling with LWD

The Weatherford Revolution Core rotary-steerable system (RSS) features point-the-bit drilling technology for improved borehole quality, rates of penetration, and bit life. The Revolution Core RSS has a short, compact design that reduces the complexity of rotary-steerable drilling technology while placing critical logging-while-drilling (LWD) measurements close to the bit. Point-the-bit technology uses a pivot stabilizer to orient the drillbit axis with the axis of the planned well path, which optimizes the directional-drilling process and maximizes drilling efficiency. Relative rotation between the center shaft carries torque to the bit and nonrotating outer housing drive. A hydraulic pump generates the motive force to deflect the drillstring as programmed in the well plan.


  • Extended-reach, underbalanced, and tangent drilling

  • Drilling from vertical and building to horizontal

  • Formations requiring reduced slide intervals

Revolution Heat

Precision, directional drilling with LWD in challenging wells

The Weatherford Revolution Heat RSS enables precision drilling in high-temperature, high-pressure (HTHP) wells. The tool improves hole quality, increases drilling rates, and provides better hole cleaning in extreme drilling environments. The Revolution Heat RSS has a short, compact design to reduce the complexity of rotary-steerable drilling technology, while placing critical LWD measurements close to the bit. The Revolution Heat RSS can be combined with a comprehensive range of advanced Weatherford HTHP LWD sensors to deliver a complete drilling-and-evaluation service in extreme well conditions.


  • HTHP RSS drilling projects

  • Extended-reach drilling in HTHP wells

  • Complete RSS and LWD evaluation in HTHP environments

  • Continuous real-time near-bit inclination and gamma ray

  • Formations requiring reduced slide intervals

Revolution SRT

Cost-effective, directional drilling

The Weatherford Revolution SRT (slide-reduction tool), with targeted bit-speed technology, offers an economic alternative to RSS. This system provides rotary well-trajectory control for a variety of different drilling conditions and full 3D directional control while maintaining drillstring rotation to effectively reduce drilling time and to mitigate lost-in-hole risk in problematic drilling environments. The Revolution SRT uses a positive-displacement mud motor in conjunction with a proprietary synchronized-motor rpm controller and directional guidance system. The system uses the Weatherford HEL (hostile-environment-logging)-MWD technology and the real-time, high-temperature azimuthal gamma ray (HAGR) sensor.


  • Simple 3D well-design applications, including vertical control, build/hold/drop, tangent, S-type, extended-reach drilling, and horizontal wells

  • Unconventional wells that require slide elimination in long tangent sections

  • Reduction of slide/correction intervals in horizontal sections

Revolution V

Affordable, automated vertical drilling with LWD

The Weatherford Revolution V RSS enables cost-effective vertical rotary drilling that continuously and automatically maintains a vertical wellbore. The Revolution V RSS has a short, compact design that reduces the complexity of rotary-steerable drilling technology while placing critical LWD measurements close to the bit. Available on nearly any rotary rig, the Revolution V RSS actively measures and corrects any deviation to maintain a vertical wellbore through the entire well profile. The wellbore survey information is monitored by Weatherford wellsite directional drillers but does not require direct input for automatic corrections.


  • Automatically maintains a vertical wellbore

  • Eliminates motor correction runs

  • Continuously monitors real-time, near-bit inclination

  • Combinable with Weatherford LWD sensors

  • Can be run in standalone mode, preconfigured at the surface

Revolution 16

Enhanced drilling reach, control, and speed

The Weatherford Revolution 16 RSS allows deeper kick-offs and the drilling of complex build sections that result in more reservoir exposure and faster drilling times. The Revolution 16 RSS has a short, compact design that reduces the complexity of rotary-steerable drilling technology and improves trajectory control and wellbore placement. The Revolution 16 RSS can drill complex 3D wellbores with full bottomhole-assembly (BHA) rotation while approaching 16°/100 ft (/30 m). Complete shoe-to-shoe drilling in a single run reduces overall drilling time while drilling well trajectories that were previously unattainable. Continuous string rotation with the Revolution 16 RSS reduces drilling torque-and-drag, while providing better hole cleaning and improved borehole quality.


  • Deeper kick-offs

  • Increased reservoir exposure

  • Drilling from vertical building to horizontal in a single run

  • Near-bit inclination and gamma ray measurements for geological control

  • Motorized option available