Rotary blasthole drilling rig flexible jaw pipe positioner

Details Rotary blasthole drilling rig flexible jaw pipe positioner Rotary blasthole drilling rig flexible jaw pipe positioner

E - Fixed Constructions

21

B

E21B 19/16 (2006.01) E21B 7/02 (2006.01) E21B 19/22 (2006.01)

Patent

CA 2758734

A pipe positioner having an arm including a lower jaw and an upper jaw mounted thereon is provided. The pipe positioner includes at least one of the lower jaw and the upper jaw with a shear pin disposed in location to provide protection of the pipe positioner from mechanical overload. A method for retrofit of a pipe positioner and a blasthole drilling rig are disclosed.

L'invention concerne un positionneur de tuyau comprenant un bras doté d'une mâchoire inférieure et d'une mâchoire supérieure installée sur celui-ci. Au moins l'une des deux mâchoires inférieure ou supérieure du positionneur de tuyau comprend une broche de cisaillement disposée à un endroit afin de protéger le positionneur de tuyau de la surcharge mécanique. L'invention concerne également un procédé de rétromontage d'un positionneur de tuyau et un appareil de forage de trous de mines.

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