Pipe handling apparatus with arm stiffening

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 19/00 (2006.01) E21B 19/14 (2006.01)

Patent

CA 2748422

A pipe handling apparatus (10) has a supporting structure (16), an arm (24) pivotally interconnected to the supporting structure (16) such that the supporting structure (16) and the arm (24) are movable between a first position and a second position within a single degree of freedom, and a stiffener cooperative with the arm (24) when the arm (24) and the supporting structure (16) are in the second position. The stiffener applies a mechanical resistance to the arm (24) in the second position. The second position is at an end of the travel of the supporting structure (16) and the arm (24). The stiffener applies a variable resistance to the arm (24) as the arm (24) moves from the first position to the second position. This variable resistance is at its greatest when the arm (24) is in the second position.

La présente invention porte sur un appareil de manipulation de tuyaux (10) qui a une structure portante (16), un bras (24) interconnecté en pivotement à la structure portante (16) de telle sorte que la structure portante (16) et le bras (24) puissent être déplacés entre une première position et une seconde position selon un seul degré de liberté, et un raidisseur en coopération avec le bras (24) lorsque le bras (24) et la structure portante (16) sont dans la seconde position. Le raidisseur applique une résistance mécanique au bras (24) dans la seconde position. La seconde position est à la fin du déplacement de la structure portante (16) et du bras (24). Le raidisseur applique une résistance variable au bras (24) à mesure que le bras (24) se déplace de la première position à la seconde position. Cette résistance variable est à son maximum lorsque le bras (24) est dans la seconde position.

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