Patent ID: 11946572
Assignee: NIPPON STEEL CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  E | IPC E  F

Claim 0:
1. A threaded tubular connection comprising:
a first tubular component including a female portion defined on an interior surface of the first tubular component, the female portion including an inner threaded portion and an outer threaded portion which are offset radially with respect to a longitudinal axis of the first tubular component by a first shoulder, the female outer threaded portion being closer from a female free end than the female inner threaded portion; and
a second tubular component including a male portion defined on an exterior surface of the second tubular component,
the male portion to be inserted into the female portion, the male portion including an inner threaded portion and an outer threaded portion which are offset radially with respect to a longitudinal axis of the second tubular component by a second shoulder, the second shoulder to abut the first shoulder once the male portion is connected to the female portion,
wherein an inner end portion of the female portion comprises a conical section,
wherein an inner end portion of the male portion extending between the male inner threaded portion and a male free end comprises a domed section that is a radiused portion with a single radius of curvature between 10 and 40 mm, such that the domed section and the conical section contact to form a fluid tight seal once the male portion is connected to the female portion, the male domed section comprises extremities including a closest extremity where the domed section tangentially connects to a male conical surface and a farthest extremity where the domed section tangentially connects to a male cylindrical surface, the closest extremity being closer to the male free end than the farthest extremity,
wherein the farthest extremity of the domed section from the male free end is at an axial length of less than 10 mm and the closest extremity of the domed section from the male free end is at an axial length of less than 2 mm, and
wherein the male conical surface is closer to the male free end than then male cylindrical surface.