Transfer arm positioning system

Details Transfer arm positioning system Transfer arm positioning system

E - Fixed Constructions

21

B

255/17

E21B 19/14 (2006.01) E21B 19/15 (2006.01)

Patent

CA 1255290

ABSTRACT OF THE DISCLOSURE A drilling apparatus of the type having a drilling mast and a transfer arm mounted at a first axis adjacent the mast to move between a lower position near ground level and an upper position aligned with the mast is provided with a reaction point anchor fixed with respect to the drilling mast and spaced from the first axis. A fixed length link is pivotably mounted to the transfer arm at a second axis, spaced from the first axis, and a first single stage cylinder is pivot- ably mounted at one end to the distal end of the link and at the other end to the transfer arm. A second single stage hydraulic cylinder is pivotably mounted at one end to the distal end of the link and at the other end to the reaction point.

512043

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