Method for assessing the quality of the coupling of two tubular components

A method for coupling a first tubular component including a threaded portion with a second tubular component including a threaded portion, which comprises:

• engaging the first tubular component on the second tubular component;
• rotating the first tubular component relative to the second tubular component in order to screw the threaded portions together;
• obtaining a set of points constituting a curve that represents the torque applied when screwing the first tubular component into an end position as a function of the number of turns performed by the first tubular component relative to the second tubular component;
• comparing one or more parameters of the curve obtained with one or more reference curves in a database of reference curves in which each reference curve is associated with an assessment of a quality of a coupling of first and second reference tubular components;
• and
• assessing a quality of the coupling of the first and second tubular components according to the step of comparing the curve obtained with the one or more reference curves,
• wherein the comparing step comprises comparing the shape of at least one portion of the curve obtained,
• wherein at least one reference curve in the database is associated with a coupling status representative of a conform status, and at least one reference curve in the database is associated with a coupling status representative of a non-conform status of the coupling of the first and second reference tubular components,
• wherein each reference curve in the database that is associated with the non-conform status is associated with an additional status that characterizes a problem that generated the non-conform status of the coupling of the reference tubular components, and
• wherein an algorithm is configured to calculate a sum of the torque losses for a plurality of portions of the curve that include downward-sloping portions of the curve located between the start of screwing and a bearing point.