Thread form with multifaceted flanks

Details Thread form with multifaceted flanks Thread form with multifaceted flanks

E - Fixed Constructions

21

B

E21B 17/042 (2006.01) F16L 15/06 (2006.01)

Patent

CA 2370844

A thread form for a tubular connection of the type having a pin member (31) adapted to be made-up with a box member (37) to form a pipe joint as shown. The pin member has pin threads with thread crests (33) and thread roots (35) which are adapted to be made-up with a mating box member (37) having a complimentary thread structure. The pin thread crests are formed between a stab flank (39) and a load flank (41) of the pin thread. The pin thread has a multi-faceted (69, 71, 73) complex profile stab flank for engaging a mating stab flank on the complimentary box member to provide a wedging interfit between the surfaces of the pin and box threads. The pin and box threads are also helically structured as a wedge.

La présente invention concerne une forme de filetage pour connexion tubulaire du type comportant un élément de broche (31) adapté à être assemblé à un élément de boîtier (37) en vue de former un raccordement de tuyaux. L'élément de broche présente des filets de broche avec des sommets de filet (33) et des fonds de filet (35) qui sont adaptés à être assemblés avec un élément de boîtier d'accouplement (37) présentant une structure de filet complémentaire. Les sommets de filet de la broche présente un flanc de guidage à profil complexe constitué de plusieurs facettes (69, 71, 73) destiné à être en prise avec un flanc de guidage d'accouplement sur l'élément de boîtier complémentaire en vue d'assurer un emboîtement de blocage entre les surfaces des filets de la broche et du boîtier. Les filets de la broche et du boîtier présentent une structure hélicoïdale agissant en tant que clavette.

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