Invention Grant
- Patent Title: Threaded connection having high galling resistance and method of making same
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Application No.: US15265013Application Date: 2016-09-14
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Publication No.: US10246948B2Publication Date: 2019-04-02
- Inventor: Alberto Alaria , Angelo Canavera
- Applicant: Pegasus S.r.l.
- Applicant Address: IT Turin
- Assignee: PEGASUS S.R.L.
- Current Assignee: PEGASUS S.R.L.
- Current Assignee Address: IT Turin
- Agency: Bracewell LLP
- Agent Douglas W. Rommelmann
- Main IPC: E21B17/042
- IPC: E21B17/042 ; F16L15/00

Abstract:
A process for treating a pin having an external threaded portion and a box having an internal threaded portion wherein the process provides a threadable joint having a high galling resistance. One embodiment of the present invention includes applying a lubricant on the threaded portion of at least one of the pin and box. The threadable joint is made up by threadably engaging the threaded portions of the pin and box to a recommended torque according to the American Petroleum Institute and then breaking out the threaded joint. The making up and breaking out step with lubricant applied on the threaded portion of at least one of the pin and box is performed a plurality of times. One of the threaded portions of the pin and box is then case hardened. The threadable joint made from this process is highly resistant to galling without the requirement of any lubricant.
Public/Granted literature
- US20170009535A1 THREADED CONNECTION HAVING HIGH GALLING RESISTANCE AND METHOD OF MAKING SAME Public/Granted day:2017-01-12
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