This inventor holds 3 USPTO granted patents and 1 published patent application. Top assignee: Ncs Multistage Inc.. Active years: 2025-2026.
Company Filing History:
5 out of 76 
Years Active: 2025-2026
Title: James Gambrell King: Innovator in Downhole Valve Technology
Introduction
James Gambrell King is a notable inventor based in Houston, TX (US), recognized for his contributions to downhole valve technology. He holds 3 patents that focus on enhancing the efficiency and reliability of valve assemblies used in high-temperature well operations.
Latest Patents
King's latest patents include a downhole valve assembly designed for completion operations. This innovative valve assembly utilizes non-polymeric interfaces between its components, allowing for effective sealing without elastomeric materials. This feature makes it particularly suitable for high-temperature environments, such as those found in geothermal well operations, which can reach temperatures between 320° C. and 600° C. The assembly includes a first seat that receives an actuating member to open ports in the housing, facilitating fluid injection into the formation adjacent to the valve assembly.
Another significant patent focuses on valve assemblies for high-temperature wells. This assembly consists of a tubular housing with ports that enable fluid communication between the internal passageway and the external environment. It features an outer sleeve and an inner sleeve that can slide longitudinally to control the flow through the ports. The design may include sealing assemblies capable of withstanding extreme temperatures, frangible plugs that can be sheared to open the ports, and a coupling member to connect the inner and outer sleeves during operation.
Career Highlights
James Gambrell King is associated with NCS Multistage Inc., where he applies his expertise in developing advanced valve technologies. His work has significantly impacted the efficiency of geothermal well operations, contributing to the advancement of the industry.
Collaborations
King collaborates with talented professionals such as Michael Werries and Jesse Parker Powell, enhancing the innovative capabilities of his team.
Conclusion
James Gambrell King's contributions to downhole valve technology exemplify his commitment to innovation in high-temperature well operations. His patents reflect a deep understanding of the challenges faced in geothermal environments and provide effective solutions to enhance operational efficiency.