John S Wahl

Title: John S. Wahl: Inventor in Well-Logging Technology

Introduction

John S. Wahl is an inventor associated with Ridgefield, Connecticut, and Schlumberger Technology Corporation. His patent work addresses borehole measurement and well-logging equipment. He holds 2 patents.

Latest Patents

Wahl’s patents describe two technologies for gathering information from boreholes.

“Cement Thickness Measurements in Cased Boreholes” presents methods and apparatus for determining the thickness of solid material, such as cement, along a borehole wall. The system emits gamma radiation and measures the returning radiation with three detectors positioned at different distances from the source. Comparing these measurements helps determine the thickness of the material surrounding the borehole.

“Well Logging Sonde Including a Linear Particle Accelerator” describes a logging sonde built around a standing-wave microwave linear particle accelerator. A magnetron excites the accelerator, which produces bursts of high-energy electrons that can strike either a neutron-emitting or photon-emitting target. The design also monitors the accelerator’s microwave-field amplitude and temperature, adjusting the magnetron frequency to maintain the accelerating field and compensate for temperature-related changes in resonance.

Career Highlights

Wahl’s patent portfolio reflects work on specialized tools for well logging and subsurface evaluation. His inventions combine radiation detection, particle acceleration, and control systems to support measurements in boreholes.

Collaborations

Wahl is associated with Schlumberger Technology Corporation. His listed coworkers include Nick A. Schuster and Ronald E. Turcotte.

Conclusion

John S. Wahl’s patents focus on improving borehole measurements through gamma-radiation analysis and accelerator-based well-logging equipment.