This inventor holds 1 USPTO granted patent. Top assignee: Hydril Company. Active years: 1981.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1981
Title: William R. Hadsell and the Internal Mud Saver Valve.
Introduction
William R. Hadsell was an inventor associated with Hydril Company in Los Angeles, California. His patent work addressed a practical challenge in drilling operations: preventing drilling fluid from spilling from the lower end of a kelly.
Latest Patents
Hadsell’s listed patent is “Internal Mud Saver Valve.” The invention describes a threaded valve assembly with an elongated body, a movable hollow piston, a cam, and a pivoting valve element. Fluid pressure pushes the piston downward, allowing the cam to lift the valve element from its seat and open the valve. When that pressure is removed, the piston moves upward and a spring returns the valve element to its closed position, helping prevent drilling fluid from spilling. Hadsell is credited with 1 patent.
Career Highlights
Hadsell’s documented patent contribution reflects an engineering focus on fluid control in drilling equipment. The internal mud saver valve uses pressure-responsive movement and a spring-biased closure to regulate the flow of drilling fluid.
Collaborations
Tosh Miyagishima is identified as Hadsell’s coworker. The available information does not specify whether Miyagishima collaborated on the patent.
Conclusion
William R. Hadsell’s “Internal Mud Saver Valve” represents a practical invention designed to reduce drilling-fluid spills through a pressure-operated, automatically closing mechanism.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile