Multiple string tubing hanger constructions

Claim 1

IN A MULTIPLE STRING WELLHEAD CONSTRUCTION, THE COMBINATION OF A HEAD MEMBER HAVING A VERTICAL BORE THERETHROUGH; A HANGER ASSEMBLY COMPRISING AN INDEPENDENT, UNITARY HANGER MEMBER OF SUCH CROSS-SECTIONAL SHAPE AND DIMENSIONS AS TO SUBSTANTIALLY FILL SAID BORE, SAID HANGER MEMBER AND SAID HEAD MEMBER HAVING COOPERATING SHOULDER MEANS FOR SUPPORT OF SAID HANGER MEMBER ON SAID HEAD MEMBER WHEN SAID HANGER MEMBER IS INSERTED DOWNWARDLY INTO SAID BORE, SAID HANGER MEMBER HAVING A PLURALITY OF VERTICAL TUBING STRING ACCOMMODATING PASSAGES AND A PLURALITY OF LATERAL CHAMBERS, EACH OF SAID CHAMBERS OPENING BOTH INWARDLY, INTO ONE OF SAID TUBING STRING ACCOMMODATING PASSAGES, AND OUTWARDLY, TOWARD THE WALL OF SAID BORE OF SAID HEAD MEMBER WHEN SAID HANGER MEMBER IS SUPPORTED THEREIN, AND A PLURALITY OF LATERAL MEMBERS EACH SLIDABLY DISPOSED IN A DIFFERENT ONE OF SAID CHAMBERS AND PROVIDED WITH AN INNER END PORTION HAVING AN UPWARDLY DIRECTED SUPPORTING SURFACE, EACH OF SAID LATERAL MEMBERS BEING WHOLLY SUPPORTED BY SAID HANGER MEMBER AND MOVABLE BETWEEN AN OUTER POSITION, IN WHICH THE LATERAL MEMBER IS WHOLLY DISPOSED WITHIN ITS RESPECTIVE ONE OF SAID CHAMBERS, AND AN INNER POSITION, IN WHICH SAID INNER END PORTION THEREOF PROJECTS INTO THE CORRESPONDING ONE OF SAID TUBING STRING ACCOMMODATING PASSAGES; A PLURALITY OF TUBING STRING SUPPORTING MEMBERS EACH DIMENSIONED FOR FREE AXIAL PASSAGE THROUGH ONE OF SAID TUBING STRING ACCOMMODATING PASSAGES WHEN SAID LATERAL MEMBERS OCCUPY SAID OUTER POSITIONS, SAID TUBING STRING SUPPORTING MEMBERS EACH HAVING EXTERIOR DOWNWARDLY FACING SHOULDER MEANS ADAPTED TO SEAT UPON THE CORRESPONDING UPWARDLY DIRECTED SUPPORTING SURFACES OF SAID LATERAL MEMBERS WHEN THE LATTER OCCUPY SAID INNER POSITIONS; AND ACTUATING MEANS FOR SELECTIVELY AND INDEPENDENTLY MOVING SAID LATERAL MEMBERS INTO SAID INNER POSITIONS, FOR SUPPORT OF THE CORRESPONDING ONES OF SAID TUBING STRING SUPPORTING MEMBERS, AND INTO SAID OUTER POSITIONS, TO CLEAR SAID TUBING STRING ACCOMMODATING PASSAGES FOR FREE MOVEMENT OF THE CORRESPONDING TUBING STRING SUPPORTING MEMBERS THERETHROUGH, SAID ACTUATING MEANS COMPRISING ACTUATING MEMBERS CARRIED BY SAID HEAD MEMBER AND SEALED THERETO IN FLUID-TIGHT RELATION.