Electrical connectors – Interrelated connectors relatively movable during use – Movement about axis
Patent
1993-12-15
1995-11-21
Pirlot, David L.
Electrical connectors
Interrelated connectors relatively movable during use
Movement about axis
439840, 439 18, H01R 3900
Patent
active
054681537
ABSTRACT:
A rotatable electrical connector or swivel is used in a substantially vertical subterranean portion of a drill string within a drill pipe. The swivel has an enclosed oil filled chamber having a first shaft concentrically mounted therein. The first shaft protrudes from the chamber and is electrically connected to one end of a wireline which is used for electrical connection between the surface and instruments located downhole. Within the interior of the oil filled chamber the first shaft is attached to a first member disposed within the complementary surface of a second member concentrically aligned with the first member. The second member includes a second shaft which protrudes from the oil filled chamber and is connected to the other end of the wireline. One of the two shafts is rotatably mounted in bearing within the chamber so that the complementary surfaces of the first and second members are in the relationship of a rotor and stator. Continuous, electrical contact between the rotor and stator surfaces are assured by placement of a plurality of berrylium copper wire spring wipers between the rotors and stators. The enclosure of the oil filled chamber, includes an elastic member which permits equalization of the internal oil pressure within the chamber with the external hydrostatic pressure of the drilling fluid or other fluid present in the drill pipe.
REFERENCES:
patent: 1720619 (1929-07-01), Baldwin
patent: 1873042 (1932-08-01), Rohrdanz
patent: 2339274 (1944-01-01), Kothny
patent: 3056101 (1962-09-01), Bethke
patent: 3259727 (1966-07-01), Casler
patent: 3753206 (1973-08-01), Busuttil et al.
Brown Robert L.
Holodnak John D.
McBride Gene
Mosley Demmie L.
Drilling Measurements, Inc.
Pirlot David L.
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