Invention Grant
- Patent Title: Fatigue reducing shouldered connections
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Application No.: US16596360Application Date: 2019-10-08
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Publication No.: US11332982B2Publication Date: 2022-05-17
- Inventor: Cain Pacheco , Michael Sanders
- Applicant: Coastal Pipe USA, L.L.C.
- Applicant Address: US TX Houston
- Assignee: Coastal Pipe USA, L.L.C.
- Current Assignee: Coastal Pipe USA, L.L.C.
- Current Assignee Address: US TX Houston
- Agency: Tumey L.L.P.
- Main IPC: F16L15/06
- IPC: F16L15/06 ; E21B17/042

Abstract:
A double shoulder threaded tool joint connection includes a pin with external threads formed between a pin external shoulder and a pin internal shoulder, the pin including a nose section between the pin internal shoulder and the pin external thread and a box with internal threads formed between a box external shoulder and a box internal shoulder. The internal threads and the external threads are arranged and designed for connection with each other so that the box and the pin are connected with a common center-line and with a primary seal formed by the pin external shoulder forced against the box external shoulder and a secondary seal formed between the pin internal shoulder forced again the box internal shoulder. The invention may be applied to any threaded joint.
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