COLLAPSIBLE MODULAR MAST WITH INBUILT SYSTEM OF UPPER DRIVE Russian patent published in 2013 - IPC E21B15/00 

FIELD: machine building.

SUBSTANCE: collapsible mast with an inbuilt system of an upper drive comprises upper and lower modules. Each module comprises a bearing frame made of sections. The upper module of the mast is connected with a crown block. The lower module is equipped with supports of fixation to the base. Upper and lower modules comprise lock devices, making it possible to separate modules from each other. The mast comprises platforms and supports fixed to the base of a drilling rig, a device of mast lifting, a pulley block system and an upper drive equipped with carriages for its displacement along guides. The upper and lower blocks are equipped with two parallel columns. Parallel columns arranged in the lower module are connected to each other by rows of transverse beams, a beam with an eye and Z-shaped eccentrics with sections of the bearing frame. The lower module is equipped with a mechanism of mast folding. Carriages of the upper drive are installed as capable of interaction with the outer surface of parallel columns and are equipped with eyes. Eyes provide for fixation of the upper drive in the upper module of the mast in the transport position of the mast with preservation of the pulley block system rigging.

EFFECT: invention provides for the possibility to transport a mast by general-purpose transport, storage and extension of a mast without installation and removal of its components.