Authors: T.A. Kuznetsova, K.A. Ziborov, L.I. Chernukha, V.N. Maryenko

 

When drilling and extracting minerals from deep sea they use standpipe compose from pipes of 12 meters length. It has been analyzed 1,200 domestic and foreign patents. There are only a few types of pipe connections acceptable for use in given conditions. Particularly promising fittings are those with trapezoidal, rectangular, round, special thread profile and with rounded edges to minimize stress concentration and with blocking devices. It has been presented the data about the special thread profile giving almost uniform distribution of load along threaded surface.

2010_06 Kuzn
2012-12-14  381.34 KB  1012

Tags: pipe • connection • screw-thread • loading • durability • reliability • simplicity