Location History:
- Cheltenham, Gloucestershire, GB (1991)
- Cheltenham Gloucestershire, GB (1992)
- Gloucestershire, GB (1986 - 1996)
- Cheltenham, GB (1985 - 2005)
Company Filing History:
11 out of 319 
9 out of 72 
7 out of 19 Years Active: 1985-2005
Areas of Expertise:
Title: John D. Barr - A Pioneer in Directional Drilling Technologies
Introduction
John D. Barr, based in Cheltenham, GB, is a prominent inventor known for his significant contributions to the field of directional drilling. With an impressive portfolio of 40 patents, Barr has dedicated his career to advancing drilling technologies, particularly in the measurement and control of borehole curvature.
Latest Patents
Barr's latest innovations include two notable patents. The first focuses on the "Measurement of curvature of a subsurface borehole," which presents methods of measuring the curvature of a borehole downhole. This technology effectively utilizes curvature information to generate a bias signal that optimizes the operation of downhole bias units within directional drilling assemblies. His second patent, "Steerable rotary drilling systems," introduces a revolutionary bottom hole assembly featuring a modulated bias unit and control unit. This system employs hydraulic actuators that, when controlled synchronously with the rotation of the bias unit, provide lateral bias to the drill bit, thereby influencing the direction of drilling. The data collected through this system enhances the understanding of its operation and increases accuracy.
Career Highlights
Throughout his career, John D. Barr has collaborated with leading companies in the drilling sector. Notablely, he has contributed his expertise at NL Industries and Reed Tool Company, where he helped develop innovative solutions that have shaped the industry. His work not only reflects his technical prowess but also his commitment to advancing drilling technologies.
Collaborations
In addition to his accomplishments, Barr has collaborated with renowned professionals in the field, including John M. Clegg and William C. Motion. These collaborations have further strengthened his innovations and helped push the boundaries of what is achievable in directional drilling technology.
Conclusion
John D. Barr's impact on the field of directional drilling is substantial, as evidenced by his numerous patents and the advancements his work has contributed to the industry. His innovative spirit and technical expertise continue to inspire future developments in drilling technology, paving the way for more efficient and effective drilling practices.