Gary L Marsh

Title: Gary L Marsh: Innovator in Subsea Technology

Introduction

Gary L Marsh is a notable inventor based in New Orleans, Louisiana. He has made significant contributions to the field of subsea technology, particularly in the detection of gas kicks and the development of fluid accumulators for drilling applications. With a total of three patents to his name, Marsh's work has had a considerable impact on the oil and gas industry.

Latest Patents

One of Marsh's latest patents is the "Gas Kick Detector," which focuses on methods for the early detection of gas kicks in marine risers. This invention includes monitoring both downhole absolute pressure and downhole differential pressure of a riser section positioned just above the blowout preventer. The absolute pressure is utilized to calculate an average density of the mud or mud/gas mixture in the entire riser. The differential pressure across the riser section is then used to calculate the average density in that specific section. An unfavorable comparison between these calculated densities serves as an alert for the operator regarding the onset of a gas kick.

Another significant patent is the "Subsea Power Fluid Accumulator." This invention is designed to be connected to a subsea valve actuator on a drilling wellhead assembly before it is lowered to the ocean floor. The apparatus consists of a pressure compensated piston located in a hydraulic cylinder. The movement of this piston delivers pressurized hydraulic fluid to activate a subsea hydraulically-activated valve. The design allows for the development of a nearly absolute vacuum under a second piston, which is crucial for the operation of the hydraulic system.

Career Highlights

Throughout his career, Gary L Marsh has worked with prominent companies in the oil and gas sector, including Shell Offshore Inc. and Shell Oil Company. His experience in these organizations has provided him with valuable insights and expertise in subsea technology and drilling operations.

Collaborations

Marsh has collaborated with notable professionals in his field, including Early B Denison and Leon L Dickson. These collaborations have likely contributed to the innovative nature of his patents and advancements in subsea technology.

Conclusion

Gary L Marsh is a distinguished inventor whose work in subsea technology has led to significant advancements in the detection of gas kicks and the development of fluid accumulators. His contributions continue to influence the oil and gas industry, showcasing the importance of innovation in this critical field.