Shigeo Onishi

Title: Shigeo Onishi: Innovator in Threaded Joint Technology

Introduction

Shigeo Onishi is a notable inventor based in Osaka, Japan. He has made significant contributions to the field of threaded joint technology, holding three patents that enhance the performance and reliability of steel pipes and tubes.

Latest Patents

Onishi's latest patents include a threaded joint for steel pipes designed to offer excellent galling resistance, rust prevention, and airtightness without the need for compound grease. This innovative joint comprises a pin and a box, each featuring a threaded portion and an unthreaded metal-to-metal contact portion. The contact surfaces of at least one of these components are coated with a multi-layered structure that includes a first layer made from a specific metal or alloy, a softer second layer, and an uppermost layer of solid lubricating coating. Another patent focuses on a threaded joint for steel tubes, which also features a contact surface with a threaded portion and a non-threaded metal-to-metal contact portion. This joint is enhanced with a plating layer made of a copper-zinc alloy, along with additional undercoats and overcoats to improve its lubricating properties.

Career Highlights

Throughout his career, Shigeo Onishi has worked with prominent companies such as Sumitomo Metal Industries, Inc. and Vallourec Mannesmann Oil & Gas France. His work has significantly impacted the development of reliable and efficient threaded joints in the oil and gas industry.

Collaborations

Onishi has collaborated with notable coworkers, including Kunio Goto and Shigeo Nagasaku, contributing to advancements in threaded joint technology.

Conclusion

Shigeo Onishi's innovative patents and career achievements highlight his important role in the development of advanced threaded joint technologies. His work continues to influence the industry and improve the performance of steel pipes and tubes.