Slim hold drilling

Details Slim hold drilling Slim hold drilling

1974-05-08

1977-11-08

Purser, Ernest R.

Tool driving or impacting

Means to drive tool about an axis

Relatively fixed drive for an advancing tool

175195, E21B 304, E21B 310

Patent

active

040571165

ABSTRACT:
A slim hole drilling method wherein a wellbore of a diameter no greater than about 6 inches is drilled using a drill pipe rotation rate of at least 500 rpm and rotating the drill pipe with at least one electric motor operably connected to the drill pipe. Drilling power units for carrying out the drilling method which employ at least one electric motor in mechanical connection with the drill pipe for rotating the drill pipe and moving with same as it advances toward and away from the wellbore.

REFERENCES:
patent: 545109 (1895-08-01), Storey
patent: 1499696 (1924-07-01), Rudenburg
patent: 2016785 (1935-10-01), Lawlor
patent: 2245960 (1941-06-01), Claire
patent: 3103676 (1963-09-01), Kehaly
patent: 3472553 (1969-10-01), Miller
Brantly, History of Oil Well Drilling, Gulf Publishing Co., 1971, p. 988.

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