Patent ID: 7997120
Filing Date: 2011-08-16
Classification: G01M

Abstract:
1. A method for pressure testing a first component provided with a first threaded tubular element which includes a first threading and a sealing surface which, in service, can cooperate respectively with a matching threading and a sealing surface of another tubular threaded element for connection by makeup of two threaded elements with a metal-on-metal seal between said sealing surfaces, said method comprising: making up a second component onto the first threaded element to axially compress an annular sealing ring between substantially transverse metal surfaces of the first threaded element and the second component, the second component being a cap or a plug which includes a threading matching the first threading; and establishing a test pressure inside said first and second components, wherein one of said first and second components has a male threading, and the other of said first and second components has a female threading, said one of said first and second components which has said male threading includes, between the male threading and a free end of said one of said first and second components, an annular lip which is capable of deforming radially outwardly under the effect of said test pressure, and wherein between a radially outward surface of the annular lip and a facing surface of the other of said first and second components, at the end of makeup there exists a clearance having, over at least part of an entire length of the annular lip, a value which is selected so as to be sufficiently small so that, under the effect of the test pressure, the annular lip bears on said facing surface practically without undergoing plastic deformation.