Rotatable wet connect for downhole logging devices

Details Rotatable wet connect for downhole logging devices Rotatable wet connect for downhole logging devices

1996-10-04

1998-10-20

Neuder, William P.

Wells

With electrical means

439190, E21B 2300

Patent

active

058232575

ABSTRACT:
A rotatable wet connect for downhole logging devices. A male shaft is disposed downhole within a drill string. A contact rod of an electrically conducting material having a prong at its uphole end extends through the male shaft, the contact rod electrically insulated from the male shaft. The contact rod electrically connects to a downhole logging device. A shoulder is disposed about a lower portion of the male shaft. A circumferential groove containing a multitude of ball bearings extends about the male shaft adjacent the uphole side of the shoulder. A collar is disposed over the male shaft and rests atop and retains the ball bearings. Set screws retain the collar in place on the male shaft. Once in place atop the ball bearings, the collar may rotate freely about the male shaft. A female sleeve carries a spring biased disc for making electrical contact with the prong of the male shaft. The disc is electrically coupled to the spring, which in turn is electrically coupled to the wireline.
The female sleeve is lowered via an electric wireline over the male shaft, the bore of the female sleeve closely engaging the male shaft. The disc, spring biased downward to a first position, contacts the prong and establishes electric connection with the surface. The female sleeve continues downhole to rest atop the collar, the rotating collar supporting the female sleeve, enabling relative rotation between the female sleeve and the male shaft.

REFERENCES:
patent: 4174875 (1979-11-01), Wilson et al.
patent: 4921438 (1990-05-01), Godfrey et al.
patent: 5058683 (1991-10-01), Godfrey et al.
patent: 5141051 (1992-08-01), Lenhart
patent: 5358418 (1994-10-01), Carmichael
patent: 5389003 (1995-02-01), Van Steenwyk et al.

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