Nippon Steel Corporation

Vallourec Oil and Gas France

Yosuke Oku

Satoshi Maruta

Alan Fothergill

Benoit Briane

A threaded tubular connection includes a tubular female end extending from a main body of a first tubular member, and a tubular male end extending from a main body of a second tubular member, such that the tubular male end includes a first machined inner surface close to the male free end and a second machined inner cylindrical surface above a threaded portion of the male end such that a second inner diameter of the second machined inner cylindrical surface is smaller than a first inner diameter of the first machined inner surface.

Growing community of inventors

Chiyoda-ku, Japan

Yosuke Oku