Sealed tubular connection used in the oil industry, and method for producing said connection

Abstract

The invention concerns a threaded connection (1) comprising a first and a second tubular component, the first component comprising a male end (3) provided on its outer peripheral surface with, in succession, a threaded zone (5), a sealing surface (13) then a terminal surface (15) finishing in an abutment surface (7) which is orientated radially with respect to the axis of revolution (20) of the connection (1), the second component comprising a female end (2) provided on its inner peripheral surface with, in succession, a threaded zone (4), a sealing surface (12) then a recess (10) finishing in an abutment surface (8) which is orientated radially with respect to the axis of revolution (20) of the connection, the threaded zone (5) of the male end (3) being made up into the threaded zone (4) of the female end (2) such that the sealing surfaces (12) and (13) are in interfering contact, as are the abutment surfaces (7) and (8), the space between the terminal surface (15) and the recess (10) defining a volume (17), characterized in that the volume (17) is at least partially filled with a filling material (M). The invention also concerns a method for producing such a connection.

Description

technical field [0001] The present invention relates to the field of sealing connections for tubular assemblies used in particular for drilling or operating hydrocarbon wells. In these applications, since the connecting structure is subjected to large compressive and tensile loads, the connecting structure needs to have outstanding tightness in use. Background technique [0002] The American Petroleum Institute (API), defines standard connection structures in technical specifications 5CT and 5B, which in particular include the coupling of the threaded areas of the two connecting components; sealing results from the application inserted between the male threaded area and the female threaded area grease between them, and therefore, the performance of the seal is limited to liquids or gases moving at relatively low pressures. [0003] In order to enhance the tightness, the prior art describes a superior connection structure, developed especially by the applicant, which exceeds...

AI Technical Summary

Problems solved by technology

[0013] Furthermore, the applicant was not immediately aware of the problem with the threaded connection of document WO-2004 / 109173 because the test standard ISO 13679:2002 requires in its paragraphs 6-7 that the threaded connection to be tested be specifically modified to carry out testing

Problems that may occur with commercial ready-to-use threaded connections may generally go unnoticed in this test performed on threaded connections - threaded connections modified for testing

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