Experimental research regarding the butt welding applied to the coiled tubing through the wig (wolfram inert gas) welding procedure

Abstract

This paper describes the results of the authors’s experimental research regarding the WIG butt-welding procedure (WIG – Wolfram Inert Gas) applied to a number of A and QT 700 (X 70) specimens of coiled tubing under laboratory conditions (QT = Quality Tubing; 700 = 70,000 psi = 482.58 N/mm2 as their yield strength), the two possible options (presence or absence of a permanent metal support of the root) being equally taken into account and the results of the non-destructive tests (penetrating radiation testing) as well as those of the destructive ones (tensile / flattening / hardness tests and microscopic examination) applied to the coiled tubing in its position of oilfield tubular materials. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/10705