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US 3,981,485 AGranted
Helicopter transportable drilling rig
AssigneeDresser Industries, Inc.
InventorsKenneth Harmon Eddy, Kenneth Harmon McGill
Life of this patent
Estimating the term…
Abstract
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.
Claims15
A power system for an oil well drilling rig, said system being constructed of integral componets each being portable and having a weight of less than about 4000 pounds, said system comprising:
- a plurality of prime movers arranged in close proximity to each other;
- means for receiving and mounting each of said prime movers and for transmitting power from said prime movers;
- said means comprising an integral, portable unit for each said prime mover;
- power transfer means interconnectable with said transmitting means and adapted to receive power from at least two of said prime movers via said transmitting means and to transfer said power to an output shaft, said power transfer means comprising a plurality of integral power transfer systems, each system being an integral unit fully transportable without disassembly thereof, and each said system having easily disconnected and reconnected power input and output means;
- power accumulator means for receiving the power from all of said prime movers and having alternately selective dual power outputs;
- transmission means connected to said accumulator means and having a high speed transmission connected to one of said accumulator means power outputs, and a low speed transmission connected to the other of said accumulator means power outputs;
- main drum drive means releasably connected to both of said transmissions and arranged to selectively receive power from either of said transmissions and transmist power to two output shafts;
- said main drum drive means being an integral, fully portable unit in itself;
- a main drawworks drum connected to one of said output shafts of said main drum drive means in driven relationship therewith;
- and,
- main drum brake means connected to said main drum and arranged to apply braking forces thereto, said brake means comprising an integral brake system disconnectable from said main drum brake means without disassembly of said integral brake system.
8 more elements
A compact drilling rig power system quickly disassembled into fully portable, integral sub-components, said power system comprising:
- six prime movers arranged in two groups of three;
- six portable skid units each adapted to receive one of said prime movers in disengagible connection therewith, and further having power transmission means thereon for transmitting power from said prime mover;
- four power transfer assemblies interconnected with said six prime movers and arranged to transfer the power from all six prime movers to a single final output shaft, each said assembly being an integral, sealed, fully portable unit in itself and being quickly and easily disconnectable from said prime movers;
- a high speed transmission connected to one end of said final output shaft;
- a low speed transmission connected to the opposite end of said final output shaft;
- a final drive transfer assembly having input and output shafts passing transversely therethrough interconnected by power transfer means inside said assembly;
- first clutch means drivably and releasably connected between said high speed transmission and said final drive input shaft;
- second clutch means drivably and releasably connected between said second transmission and said final drive input shaft;
- a main drawworks drum drivably connected to said final drive output shaft;
- and,
- a main drum brake system connected to said main drum and arranged to apply braking force to said main drum;
- said main brake system having a removable brake assembly quickly disconnectable therefrom, fully portable as a unit, and easily reconnectable to said brake system.
9 more elements
Dependencies are inferred from the claim text.