Drawworks for portable drilling rig

Details Drawworks for portable drilling rig Drawworks for portable drilling rig

E - Fixed Constructions

21

B

255/17, 254/96

E21B 15/00 (2006.01) E21B 19/02 (2006.01) E21B 19/08 (2006.01)

Patent

CA 1064898

ABSTRACT OF THE DISCLOSURE A portable drilling rig which may be disassembled into subcomponent packages small enough to be transported to the site by helicopter and quickly reassembled utilizes unique chain drive units, compound arrangement and drawworks assembly. Included in the assembly is a brake assembly having a hub attach- ed to the drawworks, a brake drum releasably connected to the hub for rotation therewith, and a brake means engagable with the drum, the drum and brake means being removable as a single package.

289567

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