Iron roughneck

Details Iron roughneck Iron roughneck

E - Fixed Constructions

21

B

E21B 19/16 (2006.01)

Patent

CA 2370196

An iron roughneck has a pair of upper jaws carrying pipe gripping dies for gripping tool joints. The jaws have recesses formed on each side of the pipe gripping dies to receive spinning rollers. By positioning the spinning rollers in the upper jaws at the same level as pipe gripping dies, the spinning rollers are able to engage the pipe closer to the lower jaws and thus can act on the tool joint rather than on the pipe stem.

L'invention concerne un aide-foreur mécanique comportant une paire de mâchoires supérieures sur laquelle sont montés des coussinets de serrage de tube destinés au serrage de joints de tige. Ces mâchoires comportent des évidements formés sur chaque côté desdits coussinets, servant à recevoir des rouleaux rotatifs. En positionnant lesdits rouleaux dans les mâchoires supérieures au même niveau que les coussinets de serrage, ces rouleaux peuvent entrer en prise avec le tube plus près des mâchoires inférieures et agir par conséquent sur le joint de tige plutôt que sur la tige proprement dite.

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