E - Fixed Constructions – 04 – H
Patent
E - Fixed Constructions
04
H
20/112.1
E04H 12/00 (2006.01) E04H 12/34 (2006.01) E21B 15/00 (2006.01)
Patent
CA 1104321
LOW LIFT, ELEVATABLE HIGH FLOOR DRILLING MAST AND SUBSTRUCTURE ARRANGEMENT THEREFOR Abstract of the Disclosure Low level base means extend longitudinally on the earth's surface. Drilling mast support means are positioned adjacent and pivotally connected to the base means and setback tower means are pivotally connected to the mast support means and to the base means. Drilling mast means are secured to the mast support means. Lifting frame means are connected to the drilling mast support means whereby said drilling mast support means, mast connected thereto and setback tower means may be simultaneously elevated from a reclined position to an upright position on the base means. Cable means may be secured at one end to the lifting frame means and extended around sheave means on the base means over sheave means on the lifting frame means and under sheave means on the mast support means and then con- nected at its other end with any suitable power source to exert a pull on the cable and elevate the mast support, mast and set back tower to an upright position on the base means where the mast may be secured in upright position. Elevatable drawworks support means is pivotally connected to the low level base means adjacent the other side of the drilling mast support means. The drawworks support means is provided with rotary table support means projecting from the drawworks support means. When the elevatable drawworks support means is raised to position it adjacent the upright drilling mast support means in a manner well known, the rotary table support means is properly posi- tioned adjacent the drilling mast setback tower means so that the rotary table support means may be secured to the elevated setback tower to form a rigid substructure for the upright drill- ing mast.
321425
George H. Riches And Associates
Patterson Bradley C.
LandOfFree
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