Drilling boom

Details Drilling boom Drilling boom

E - Fixed Constructions

21

B

255/35

E21B 15/00 (2006.01) E21B 15/04 (2006.01)

Patent

CA 1236826

ABSTRACT A drilling boom is pivoted about a first axis on a base and is pivoted about that axis by a first hydraulic cylinder. It carries a feeder beam carrier at its forward end. The carrier is pivoted at the forward end of the boom about a second axis which is parallel to the first axis, and it is moved about the second axis by a second hydraulic cylinder in a sense opposite to that in which the boom is moved by the first cylinder. The first and second cylinder are so dimensioned and hydraulically interconnected that fluid which is expelled from the first cylinder actuates the second cylinder and vice versa. The angular movements of the boom and carrier are equal in magnitude.

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