F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 33/02 (2006.01) D02G 1/00 (2006.01) F16L 15/00 (2006.01) F16L 15/06 (2006.01) F16L 25/00 (2006.01)
Patent
CA 2514759
A thread form having improved strength and fatigue resistance. The root of the thread is cut on multiple cutting radii having displaced centers. At least two of the root surfaces are formed by cutting radii having lengths that are greater than the root truncation. The threads are used in a double start configuration to increase the connection strength and reduce makeup and breakout rotations.
La présente invention concerne une forme du filet mécaniquement plus résistante et de meilleure résistance à la fatigue. Le fond de filet est taillé selon plusieurs rayons de taille décentrés. Deux au moins des surfaces du fond de filet résultent de rayons de taille aux longueurs supérieures à la troncature du fond. Ces filets, utilisés dans les configurations double pas, permettent d'augmenter la résistance du raccord et de réduire le nombre de tours de blocage et de déblocage.
Breihan James W.
Muradov Andrei M.
Finlayson & Singlehurst
Grant Prideco L.p.
LandOfFree
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