Company Filing History:
1 out of 251 
1 out of 1,860 Years Active: 1991-1992
Title: Doug J McCallum: Innovator in Hydrocarbon Recovery
Introduction
Doug J McCallum is a notable inventor based in Calgary, Canada. He has made significant contributions to the field of hydrocarbon recovery, holding 2 patents that showcase his innovative approaches. His work primarily focuses on methods for fluid injection and oil production from single wellbores.
Latest Patents
McCallum's latest patents include a "Single Well Injection and Production System" and a "Method of Recovering Hydrocarbons Using Single Well Injection/Production." The first patent discloses a method for fluid injection and oil production from a single wellbore, which involves providing a path of communication between the injection and production zones. The second patent details a process for initiating the production of viscous hydrocarbons by injecting fluid down at least two tubing strings in a wellbore. This method ensures controlled production of formation fluids while maintaining a liquid level above the production perforations to avoid uncondensed steam entry.
Career Highlights
Throughout his career, McCallum has worked with prominent companies such as Chevron Research & Technology Company and Chevron Research Company. His experience in these organizations has allowed him to refine his expertise in hydrocarbon recovery techniques.
Collaborations
Some of McCallum's notable coworkers include John H Duerksen and Donald J Anderson. Their collaborative efforts have contributed to advancements in the field of hydrocarbon recovery.
Conclusion
Doug J McCallum's innovative patents and career achievements highlight his significant role in the advancement of hydrocarbon recovery methods. His work continues to influence the industry and pave the way for future innovations.