Measurement While Drilling (MWD) Tools
Downhole Tools

For more information on any of our products or services please call us at the number above or click here for a quick quote:

Measurement While Drilling (MWD) Tools
Downhole Tools

For more information on any of our products or services please call us at the number above or click here for a quick quote:

Products and Solutions

With more than 30 years of innovative and reliable products and design solutions for the upstream oil and gas industry, CBG offers a comprehensive line of downhole gamma tools for Measurement While Drilling (MWD) and Logging While Drilling (LWD).

CBG is the leading worldwide supplier of MWD/LWD gamma tools. The probe based NGT-T gamma tool is the industry standard. Originally designed for the first Tensor system in 1993, it continues to lead the way in measuring naturally occurring gamma radiation emitted from the formation surrounding the drill bit.

CBG’s smaller diameter scintillator gamma tools meet design requirements for newer collar mounted applications. The NGT-075-B is the smallest diameter scintillator gamma on the market at only ¾” OD. The NGT-CSX and NGT-CSX-B at 1.05” OD, are still small enough to be mounted within the drill collar but with a higher sensitivity.

CBG also supplies directionally sensitive or “focused” gamma tools such as the DGA, DGA-C and the new Dual-Detector, DDG for Azimuthal gamma measurements.

In addition to our catalog of standard CBG gamma sensors, we are ready to work with your engineers to develop custom designed technology solutions to meet your specific requirements. We have designed and currently manufacture nearly 20 custom gamma tools for customers around the globe.

As Directional Drilling continues to push the limits with faster ROP and longer laterals, these tools must also continue to improve to meet these real time data and data rate challenges. CBG goes to great lengths to ensure its products are reliable and up to the challenge with advanced in-house testing. Utilizing the recently installed HASS environmental test chamber, every CBG product is subjected to extensive high temperature and vibration testing to ensure reliable drilling fluid and drilling tools performance and data transmission from the start of the job through its completion.


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Enhanced Reliability Tests

Introducing CBG’s latest commitment to insuring the most reliable downhole tools on the market. The recently installed Thermatron HASS chamber enhances our ability to more accurately simulate real drilling environments with simultaneous 3-axis vibration and temperature profiles. Every CBG tool is tested under severe conditions to insure their reliable success during drilling or logging operations. No other equipment supplier takes their products reliability more seriously than CBG.

Pictured above: Thermatron AST-35 HASS chamber with RSL-16-SCI multi-axis repetitive shock vibration system testing 8 CBG gamma tools

PN 200-000-000_NGT-T-800x493


Probe and collar mounted scintillator gamma tools

PN 203-000-000_NGT-TX-800x503

Custom Designs

CBG will design a custom gamma tool to meet your unique specifications. Whether a modification to an existing tool design or an entirely new model, our Engineers will work with you to design exactly what you need.


Calibration, Maintenance and Repair. High level performance testing.

World Leader in Directional Drilling Sensors

CBG is the largest supplier of Gamma Tools, with more than 20 models and over 9000 tools in operation worldwide.  Originally designed for the Tensor system in the early 90’s, the NGT-T gamma tool was the first of its kind available to the independent Directional Drilling industry.  With more than 150 companies worldwide currently using the NGT-T gamma tool, it remains the most reliable and cost effective tool in the industry to support horizontal and directional drill’s services.

Our Tools Have Been Used All Over The World

MWD Tools | Gamma Sensors

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