Friction and tightening force of conical threaded
by S. Baragetti, P. Clerici, S. Matteazzi
International Journal of Materials and Product Technology (IJMPT), Vol. 19, No. 5, 2003

Abstract: In this study, the friction behaviour of conical threaded connections was investigated in various conditions by performing full scale make up tests. A new procedure for friction condition evaluation in threaded joints is proposed. Several make up/break out (M/B) tests were carried out and the behaviour of the threaded connections at different make up speeds was investigated; the results were summarised and organised through the use of probability charts. All the results of the tests provide the user with a procedure, based on a large data spectrum, that enables the evaluation of whether or not to reject a connection before inserting it in the perforation drillstring.

Online publication date: Tue, 19-Aug-2003

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