E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/043 (2006.01) E21B 17/06 (2006.01)
Patent
CA 2630086
A shear coupling assembly utilizes a novel pin coupling member having radial slots formed about a top portion of the insert member, the top portion being radially expandable once engaged in the box coupling member to lockingly engage the threaded connection. Locking of the insert member in the box coupling member prevents backing-off of the connection and maintains a pretension in the neck of the pin coupling member, during use. The top portion of the insert can be radially expanded by forcing a ball bearing into a counterbore formed in the insert member.
Assemblage à raccord de cisaillement faisant appel à un élément d'accouplement à clavette innovatrice muni de fentes radiales formées autour d'une partie supérieure de l'élément d'insertion, cette partie supérieure étant expansible radialement lorsqu'elle est engagée dans l'élément d'accouplement carré afin de s'engager par verrouillage le raccord fileté. Le verrouillage de l'élément d'insertion dans l'accouplement carré empêche le recul du raccord et maintient une précontrainte sur le cou de l'accouplement à clavette lors de son utilisation. La partie supérieure de l'élément d'insertion est expansible radialement en insérant de force un roulement à billes dans le contre-alésage formé dans l'élément d'insertion.
Fotty Benjamin R.
Wolodko Benny B.
Goodwin Mckay
Weatherford/lamb Inc.
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