THEORETICAL RESEARCH AND EXPERIMENTAL TESTS FOR A NEW VERSION OF TUBING AND CASING THREAD CONNECTION

摘要

One of the modern constructive solutions for tubing and casing joint is the integral two steps threaded joint. The buttress thread assures the joint functioning. The sealing metal/metal zones are placed, one on the outer of the joint and the second on the inner zone of the box. A plastic material gasket may be used, as anticorrosive barrier, in the inner sealing zone. A central shoulder assures the final contact between the pin and the box and limits the make-up torque. The experimental tests, which we have performed, confirm the theoretical functional parameters and the technological characteristics of the joint elements.