Flexible well tool coupling

Claim 1

A WELL TOOL FOR USE IN A WELL BORE WITH IRREGULAR INCLINATIONS COMPRISING: AT LEAST TWO RELATIVELY RIGID HOUSING SECTIONS HAVING INTERFITTING COUPLING MEMBERS AT ADJACENT RESPECTIVE END PORTIONS OF SAID HOUSING SECTIONS, SAID COUPLING MEMBERS HAVING COMPLEMENTARILY SHAPED, COOPERATING SPHERICALLY SHAPED PORTIONS ABOUT AN ORIGIN POINT, MEANS CONNECTING SAID COUPLING MEMBERS TOGETHER SO THAT A BALL AND SOCKET COUPLING IS FORMED PERMITTING UNIVERSAL PIVOTING OF SAID HOUSING SECTIONS RELATIVE TO ONE ANOTHER, EACH OF SAID COUPLING MEMBERS RESPECTIVELY HAVING PASSAGES THEREIN DEFINING A TUBE SOCKET AND A SHOULDER POSITIONED ON EITHER SIDE OF SAID SPHERICALLY SHAPED PORTIONS, A THIN-WALLED, FLEXIBLE TUBULAR MEMBER EXTENDING THROUGH SAID PASSAGES WITH ITS ENDS SLIDABLY RECEIVED IN SAID TUBE SOCKETS AND INTERMEDIATE SAID SOCKET SHOULDERS, SEAL ELEMENTS POSITIONED BETWEEN THE ENDS OF SAID TUBULAR MEMBER AND SAID TUBE SOCKETS FOR SEALING THE INTERIOR OF SAID TUBE AND SAID HOUSINGS FROM FLUID IN THE WELL BORE, AND MEANS FOR CONNECTING SAID COUPLING MEMBERS FOR SIMULTANEOUS ROTATION WITHOUT LIMITING THE UNIVERSAL PIVOTAL RELATIONSHIP INCLUDING A SLOT IN ONE OF SAID MEMBERS AND A LOCKING PIN IN THE OTHER OF SAID MEMBERS WHICH EXTENDS INTO SAID SLOT, SAID PIN HAVING A CENTRAL AXIS ALIGNED PERPENDICULAR TO A LONGITUDINAL AXIS OF SAID COUPLING MEMBERS AND INTERSECTING SAID ORIGIN POINT.