Invention Grant
- Patent Title: Method for making a threaded connection for pipes, such as oil and gas pipes
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Application No.: US16807535Application Date: 2020-03-03
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Publication No.: US11614184B2Publication Date: 2023-03-28
- Inventor: Merle E. Evans , Jeroen Stijn Juliaan Van Wittenberghe
- Applicant: ARCELORMITTAL TUBULAR PRODUCTS LUXEMBOURG S.A.
- Applicant Address: LU Luxembourg
- Assignee: ARCELORMITTAL TUBULAR PRODUCTS LUXEMBOURG S.A.
- Current Assignee: ARCELORMITTAL TUBULAR PRODUCTS LUXEMBOURG S.A.
- Current Assignee Address: LU Luxembourg
- Agency: Davidson, Davidson & Kappel, LLC
- Main IPC: F16L15/00
- IPC: F16L15/00 ; E21B17/042 ; E21B17/08

Abstract:
A threaded connection includes a first tube having a pin, the pin having pin threads, a circumferential concave outer pin surface, and a pin torque shoulder at a free end, the concave outer pin surface including a pin seal surface and a continuous extension from the pin seal surface to the pin torque shoulder. A second tube has a box, the box has box threads for interacting with the pin threads, a circumferential inner box surface and a box torque shoulder. The inner box surface has a radially inwardly extending box seal surface, the pin seal surface contacts the box seal surface to define a seal. The seal is spaced from the free end when the pin and box torque shoulders contact, the continuous extension continuing from the seal to the pin torque shoulder. A method for making-up a threaded connection is also provided.
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