E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
20/112
E21B 15/00 (2006.01)
Patent
CA 1122380
Abstract of the Disclosure Telescopable drilling mast means is transportable on and pivotally connected to a first trailer means. Setback tower means is pivotally connected to the drilling mast means and to the first trailer means. Second trailer means are provided with elevatable drawworks support means with drawworks, power source and rotary table thereon which elevatable drawworks support means is transportable on and pivotally mounted on the second trailer means. Means secure the first and second trailer means in end to end relation to position the drawworks support means and drilling mast means in longitudinal alignment, and load bearing means support the first and second trailer means in position on the earth's surface. Lifting frame means is connected to the drilling mast means and positionable to extend upwardly therefrom whereby the drilling mast means, and setback tower means may be simultaneously elevated from a reclined position to an upright position on the first trailer means by cable means having one end secured to the lifting frame means and then extending over sheave means mounted on the drawworks support means and over sheave means at one end of the lifting frame means and around sheave means on the drilling mast means to be connected with the travelling block of the drilling mast. Cable means extend from the drawworks and over the crown block of the drilling mast to the travelling block to effect raising thereof. The drawworks is raised by the same cable means which is connected at one end to the elevated drilling mast and extends around sheave means on the elevatable drawworks -2- support means and underneath sheave means on the elevated drilling mast to connect with the travelling block of the upright drilling mast whereby the cable extending from the drawworks and connected over the crown block of the drilling mast to the travelling block may raise the draw- works support with the drawworks, power source and rotary table thereon to an elevated position adjacent the upright mast. -3-
348382
Borg Paul E.
Lechinger Terry M.
Borg Paul E.
George H. Riches And Associates
Lechinger Terry M.
LandOfFree
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