Title: Method for connecting electrical conductors for electric earth boring means

Abstract: Method and apparatus for earth boring using a rotary drilling rig and drilling string for mounting a bottom hole electrical motor to rotate a drill bit to form the borehole. Electrical power from an electrical power source at the earth surface is communicated to the electric motor by conductor lines positioned in the bore of the drill string and having releasable supporting connectors to enable adding and removing of lengths of conductor lines as desired. An electrical conductor swivel unit is mounted in the drilling string to enable rotation of the drilling string while operating the electric motor and an extendable electrical connector is provided in the kelly to compensate for variation in conductor lengths while effecting electrical contact with the conductors.

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Inventors: Cullen, Roy H. (Houston, TX, US)
Aker, Jimmie R. (Houston, TX, US)

Application Number: 638078
Filing Date: 1975-12-05
Publication_date: 1977-04-12
Assignee: Cullen; Roy H. (Houston, TX)
Primary Class(es): 175/65 175/104, 439/427
Other Classes:
US Patent Ref:

2355342	Aug, 1944	Van Wormer	175/104.
2531120	Nov, 1950	Feaster	175/104.
2650067	Aug, 1953	Martin	175/50.
3007534	Nov, 1961	Salnikov et al.	175/104.
3291230	Dec, 1966	Cullen et al.	175/104.
3369618	Feb, 1968	Moore	175/104.
3378811	Apr, 1968	Cullen et al.	339/96.
3807502	Apr, 1974	Heilhecker et al.	175/50.
3825078	Jul, 1974	Heilhecker et al.	175/104.

Other Refs:
Primary Examiner: Leppink, James A.
Assistant Examiner:
Attorney: Pravel, Wilson & Gambrell