Welcome to the Gauge Training Experience. We will provide the very latest in high end technical training under contract with API-U, the training arm of the American Petroleum Institute worldwide. Beginning soon, specialized training focused on the proper techniques for insuring the integrity of threads for tubing, casing and drill pipe will be available with API certification for the first time. Initial operations based in Houston, Texas will soon be available with new locations both domestically and internationally to follow. Participants can expect an interactive, focused and intense exposure to the proper methods of inspecting, and certifying tubular threads of all kinds.

About Us

  • June of 2017 – Gauge Training Inc. was founded by a father and son team. Sean and Connor O’Boyle have over 50 years of combined experience in the oil and gas industry.

  • July 2017 – March 2019, Connor O’Boyle worked closely with the senior API spec writers to create a one of a kind thread inspection course. All course materials are based off API specifications and knowledge obtained from working in various shops, including thread gauge manufacturers.

  • April 2019 – received API-U approval for thread inspection courses.

  • April 2019 – conducted first Tubing and Casing thread inspection course.

  • June 2019 – conducted first Rotary Shouldered connection inspection course.

  • September 2019 – Robert Mims Joins Gauge Training Inc. as a trainer.

  • February 2020 – debuted first Calibration Theory course.

Training is provided in conjuction with API-U.

  • Thread Inspector Training
  • Approved Training Provider
  • Gauge Measurement Instruction: ROtary Shoulder Connections

Notices, Caveats & Disclaimers


Gauge Training Inc (GTI) is a Texas based company providing instruction in the proper techniques for gauging tread forms in compliance with API specifications utilizing proper methods and practices for said gauging.  GTI is fully licensed by API-U to provide training and training verification certification to multiple API Specifications in the field of thread inspection.  GTI utilizes a variety of regularly available gauging equipment from multiple manufacturers to conduct classes.  GTI is NOT a manufacturer, distributer, manufacturer’s representative or provider of gauging equipment.


GTI does NOT endorse any particular gauging equipment over any other and does NOT promote the sale or use of any particular equipment.  GTI does not represent any manufacturer of any type of equipment and assumes no responsibility or liability for the use of any such equipment by any entity in possession of gauging equipment manufactured by any 3rd party manufacturing company.

GTI instruction is focused on the compliance to API Standards & Specification and teaches techniques and operating instructions according to and under license from API-U.  GTI is not registered, authorized, approved, licensed or otherwise working in conjunction with or under any type of cooperation agreement with any manufacturer of gauging equipment.  Rather, GTI uses commonly available gauging equipment already in wide use in the industry without any obligation or necessity for approval from any equipment manufacturers.  GTI makes NO assurances or statements of reliability, appropriateness of specific use, or warrantee for any of the equipment used in conducting our classes. 

Gauge Training & API-U

Gauge Training Inc is authorized under contract with API-U to provide teaching activities, train industry individuals in the proper use of readily available gauging equipment, conduct an examination to confirm the retention of the training information and provide an affidavit that the individual has completed the course satisfactorily according to GTI established standards.  GTI does NOT certify any individual as qualified for any specific industry occupation or discipline nor does GTI bear any responsibility for the conduct of gauge inspection techniques by any individual post training.  Rather, GTI certifies that the individual completing the instruction class has been provided specific training, has completed such training and has been tested on that training in a classroom environment and achieved a passing score on the internal GTI test.

Contact Us

Connor O'Boyle

14340 Torrey Chase Blvd. Suite 370

Houston, TX 77014


Training Services

Employee Training

On-Site Training

Training Questions