Patent ID: 7278498
Filing Date: 2007-10-09
Classification: E21B

Abstract:
1. A rotatable support for an inclinable mast of a drilling machine comprising: a connecting element connected with a lifting device of the drilling machine, the connecting element comprising two essentially parallel planar members coupled and spaced apart one from the other; and a coupling element configured for bearing a mast, the coupling element comprising two opposing coupling members connected one to the other, the coupling element being rotatable in relation to the connecting element by the action of a plurality of pistons each connected to the coupling element by a piston rod, wherein the connecting element and the coupling element are coupled one to the other with a plurality of hinges having a common rotational axis, and wherein the plurality of hinges are spaced one from the other along the common rotational axis, each of the hinges coupling one of the essentially parallel planar members with one of the coupling members, thereby enabling the passage of the piston rods therebetween.