Downhole flexible drive system

Details Downhole flexible drive system Downhole flexible drive system

1978-12-19

1980-10-14

Purser, Ernest R.

Boring or penetrating the earth

With below-ground tool drive prime mover

Plural below-ground drive prime movers

175 61, 175104, 175325, E21B 704, E21B 106

Patent

active

042275849

ABSTRACT:
An improved downhole system for operating a drill bit around a small radius of bend in the directional drilling of curved holes from a vertical well hole in an oil or gas formation. The system is comprised of a plurality of double shaft downhole motors assembled in line and their shafts are connected by a flexible coupling. A flexible assembly encloses the area between the motors and provides a means for drilling fluids to be pumped through the system to a drill bit. The system can be constructed of either electrical motors or fluid turbine motors which can operate from drilling fluids pumped down a drill pipe string.

REFERENCES:
patent: 1666461 (1928-04-01), Lord
patent: 1826634 (1931-10-01), Pippin
patent: 1850403 (1932-03-01), Lee
patent: 1923015 (1933-08-01), Sandstone
patent: 2531120 (1950-11-01), Feaster
patent: 2589534 (1952-03-01), Buttolph
patent: 2829864 (1958-04-01), Knapp
patent: 3159222 (1964-12-01), Hammer et al.
patent: 3326008 (1967-06-01), Baran et al.
patent: 3971450 (1976-07-01), Fox
patent: 3999901 (1976-12-01), Tschirky

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