Installation and method for applying mechanical stress to sample through a packer

Abstract

The invention concerns an installation doe testing system of loads of a tubular sample (ET). It comprises at least one packer (P) housed in the sample (ET) at a zone to be tested (ZT), having a longitudinal extension greater than that of the zone to be tested (ZT) and comprising: i) first pressure means (C1) for locally varying the diameter of at least one first portion of the packer (P) so as topress same against an inner surface of the sample (ET) at the zone to be tested (ZT); ii) second pressure means (C2) for exerting a first selected internal pressure on part of the inner surface located at a second portion of the packer (P); and / or iii) third pressure means (C3) for co-operating with at least one closing member (B1, B2), secured to the sample spaced apart from one end of the packer (P) to define an action zone (ZA), so as to exert on the sample (ET) a second selected internal pressure at the action zone (ZA).

Description

technical field [0001] The present invention relates to mechanical stress testing of tubular samples. Background technique [0002] By "tubular sample" here is meant any tubular body or assembly of tabès possibly interconnected by sockets. Thus, it may involve either a single pipe body, or two pipe joints connected by any means such as welding, or two threaded connections comprising male and female threads respectively and constituted by these mutually screwing male and female threads Connected pipe joints, or two pipe joints in which each pipe joint has a male thread and are connected to each other by a threaded connection consisting of a socket with two female threads. [0003] Additionally, "pipe body" here refers to any tubular element used in pressure, and / or mechanical stress, and / or corrosion, and / or high temperature areas in difficult development environments such as oil wells or refineries. Thus it may relate, for example, to drilling pipe (or "drill pipe"), or sm...

AI Technical Summary

Problems solved by technology

Therefore, this type of equipment cannot study the influence of pure pressure, nor can it study any combination of pressure and axial tension, but can only study modeled combinations through a section of the abscissa axis (X) of the plane represented by the Von Mises ellipse

[0009] Devices using both the actuator and the fluid under pressure can describe at least part of the plane represented by the Von Mises ellipse, but at the expense of complex devices

[0010] Additionally, the previously described device can only stress the sample in a static manner

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