Holding wrench for rock drilling machine and rock drilling...

Details Holding wrench for rock drilling machine and rock drilling... Holding wrench for rock drilling machine and rock drilling...

E - Fixed Constructions

21

B

E21B 19/16 (2006.01)

Patent

CA 2547707

A holding wrench (6) for holding drill string components (2') and including positioning means (10) for moving at least two gripping means (9) into engagement with wrenching surfaces (20) of the drill string components, wherein the gripping means are pivotal in a plane perpendicular to a central axis of the drill string between an active, gripping position and an inactive, retracted position. The wrench is distinguished by each gripping means (9) including locking means (14) for interlocking engagement with engagement means (15) on an adjacent gripping means (9) in the active position so as to obtain a closed rigid wrench structure.

L'invention concerne une clé (6) de support des composants (2') d'un train de forage, comprenant un moyen (10) de positionnement destiné à déplacer au moins deux moyens (9) de préhension de manière que ceux-ci viennent en contact avec les surfaces (20) d'entraînement des composants du train de forage, les moyens de préhension pivotant sur un plan perpendiculaire à un axe central du train de forage entre une position de préhension active et une position rétractée inactive. La clé se caractérise en ce que chaque moyen (9) de préhension comprend un moyen (14) de verrouillage facilitant l'interverrouillage avec un moyen (15) de contact sur un moyen (9) de préhension adjacent en position active, de manière à obtenir une structure de clé rigide fermée.

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