NeoSteer CL Curve and Lateral At-Bit Steerable System | SLB

NeoSteer CL

Curve and lateral at-bit steerable system

Render of a NeoSteer CLx on the transitional technologies background

Drill the curve and lateral in a faster single run while reducing drilling time and minimizing carbon emissions.

The NeoSteer CL curve and lateral at-bit steerable system (ABSS) is specifically designed to enable drilling the curve and lateral in a faster single run where other methods require multiple trips. It achieves high build rates, increases on-bottom drilling speed, and extends lateral lengths. Especially where vertical, curve, and lateral sections are the same hole size, the NeoSteer CL ABSS not only reduces NPT by eliminating the need to change out the BHA for every section, it also lowers CO2 emissions.

Six-axis continuous inclination and azimuth measurements and automatic trajectory control for accurate well placement in shale and unconventional wells

The NeoSteer CL ABSS includes comprehensive six-axis continuous inclination and azimuth measurements. The multiaxial component enables automatic hold inclination and azimuth (HIA) measurements for precise well positioning. This feature, along with self-steering capabilities, helps provide smooth tangents with minimized tortuosity. Near-bit extended-range gamma ray measurements provide additional well positioning data for improved real-time decision making.

Azimuthal image gamma ray for improved steering in the curve and lateral sections

The NeoSteer CL ABSS can be configured with an onboard azimuthal image gamma ray cartridge to improve in-zone percentage and enable steering within the reservoir sweet spot. With an azimuthal gamma ray cartridge just 6 ft behind the cutting structure, the ABSS can identify signs of changing lithology earlier to enact instant steering corrections.

Cutout photo of the NeoSteer CL at-bit rotary steerable system


  • Pad and batch drilling operations
  • Horizontal wells with long lateral sections
  • Wells requiring high build rates and dogleg severity (DLS)
  • Unconventional wells


  • Enables single-run drilling of vertical, curve, and lateral sections with a single BHA
  • Achieves high build rates and long lateral length requirements
  • Increases leverage of force applied to bit by placing pistons with the cutting structure
  • Improves control and reaction time


  • Application-specific Smith Bits PDC bit design
  • Nonmagnetic steering unit body
  • Dual hydraulically activated pistons
  • Inclination and azimuth closed loops to provide advanced automated tangent control
  • Proprietary high-endurance-strength connector
  • Near-bit measurements including
    • Inclination
    • Azimuthal
    • Gamma ray
    • Azimuthal gamma ray
    • High-definition (HD) surveying

Maximum temperature: 302 degF [150 degC]
Maximum hydrostatic pressure: 20,000 psi [138 MPa]
Maximum rotational speed: 350 rpm
Nominal OD (API): 6.75 in
Simplified side-view illustration of the core components of a NeoSteer CL at-bit rotary steerable system BHA
Land rig with green forest in the background.

Decarbonize Your Operations

NeoSteer at-bit steerable systems are part of our transition technologies portfolio of solutions that address optimizing your drilling CO2 footprint. These energy-consumption reducing technologies enable you to reach your sustainability goals by lessening your environmental impact via improved efficiency and overall saved drilling time.

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