FATIGUE-RESISTANT THREADED BEVELLED TUBULAR ELEMENT

The invention concerns a threaded tubular element (2) having a bevel such as a groove (30) produced in the material beneath the thread (4), to decrease the stiffness of the wall at the first engaged threads (22). The groove (30) enables to avoid additional tensile load at the first engaged threads (...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	VERDILLON, LIONEL
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL WEAPONS
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