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 27 years of innovative and reliable products and design solutions for the upstream oil and gas industry, CBG offers a comprehensive line of downhole tools for Measurement While Drilling (MWD), Logging While Drilling (LWD), Wireline and Casing Inspection.

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 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.

CBG products also include Wireline Natural Gamma Ray and Induction Collar Locators for accurate depth measurements for both open-hole and cased-hole logging applications.

More than simply detecting the presence of casing collars, the patented ICL, Induction Collar Locator also serves as a casing inspection tool. An electromagnetic measurement utilizing the technique of remote field eddy current testing (RFT), measures other mechanical features of the casing such as wall thickness variations caused by corrosion or perforations.

Expanding on the success of the ICL, CBG developed a larger scale version of the tool for large diameter water-well casing inspection, the CITM or Casing Inspection Thickness Measurement tool. It is the only water-well casing inspection tool capable of simultaneously measuring casing weight, internal casing diameter, collars, centralizers, perforations and internal or external corrosion. The CITM provides valuable information on casing irregularities often missed by video mwd surveying tools.

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


Probe and collar mounted scintillator gamma tools

Wireline Logging

Natural Gamma Tool and Induction Collar Locator

Casing Inspection

Measurements of casing weight, internal casing diameter, internal or external corrosion, perforations in small diameter Oil & Gas production or large diameter water-well casing.

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 | CITM | Gamma Ray Logging | Gamma Sensors

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