Company Filing History:
3 out of 1,479 
2 out of 11,805 
1 out of 1,426 Years Active: 1992-2003
Title: The Innovative Mind of Harold D. Johnson
Introduction
Harold D. Johnson, an inventive force based in Houston, TX, has made significant contributions to the field of downhole technologies through his innovative designs and engineering expertise. Holding six patents, Johnson is recognized for his creative solutions that enhance operational efficiency in the oil and gas industry.
Latest Patents
One of Johnson's most notable patents is the Electrical Surface Activated Downhole Circulating Sub. This invention features a preferred novel circulating sub that comprises an electric motor, hydraulic intensifier, connecting rod, valve sleeve, valve plug, and angled nozzles. Upon activation of the circulating sub, the electric motor drives the valve sleeve over the valve plug, enabling a flow of drilling fluid to exit the angled nozzles. When deactivated, the mechanism allows drilling fluid to flow back to the drill bit, thanks to the reversible nature of the electric motor, allowing for repeated activations and deactivations.
Career Highlights
Harold D. Johnson's career has been marked by his tenure at reputable companies in the oil and gas sector, including Halliburton Company and Halliburton Energy Services, Inc. His deep understanding of drilling technologies has made him a key asset in developing innovative tools that address complex challenges faced in downhole operations.
Collaborations
Throughout his career, Johnson has teamed up with notable colleagues, including Lance D. Underwood and Charles H. Dewey. These collaborations have led to the advancement of several projects, further establishing Johnson's reputation as a forward-thinking inventor and collaborator.
Conclusion
With his impressive portfolio of patents and a history of impactful work within the industry, Harold D. Johnson continues to be a driving force behind innovations in downhole technology. His work not only exemplifies the spirit of creativity but also contributes significantly to improving the efficiency and safety of drilling operations.