Tubing hangers

Claim 1

IN A DEVICE OF THE CLASS DESCRIBED, A TUBING HEAD HAVING A CENTRAL BORE THERETHROUGH; AN ANNULAR SHOULDER IN THE BORE; A HOLLOW CYLINDRICAL BODY SLIDABLY DISPOSED IN THE BORE AND ARRANGED TO REST ON THE SAID SHOULDER; A TRANSVERSE PARTITION IN THE BODY DIVIDING SAME INTO TWO EQUAL SEMICIRCULAR PASSAGES; A LOCATOR PIN ARRANGED TO PROJECT FROM THE INNER WALL OF THE BORE; A LOCATOR SLOT IN THE WALL OF THE BODY ARRANGED TO SLIDE OVER THE LOCATOR PIN; A PAIR OF HOLLOW HANGER BODIES HAVING LOWER PORTIONS SLIDABLE INTO THE PASSAGES THROUGH THE BODY AND BEING OF SUCH SIZE AND SHAPE AS TO FILL SAID PASSAGE; SAID HANGERS HAVING ABUTTING INNER FACES AND OUTER SEMICIRCULAR FACES TO FIT THE BORE ABOVE THE BODY; SHOULDER MEANS ON THE SEMICIRCULAR FACES; SHOULDER MEANS IN THE BORE ABOVE THE BODY ARRANGED TO RECEIVE AND SUPPORT SHOULDER MEANS ON THE HANGER BODIES; SEAL MEANS ABOVE THE ABUTTING SHOULDERS ARRANGED BETWEEN THE ABUTTING FACES OF THE HANGER BODIES AND THE SEMICIRCULAR FACES OF THE HANGERS AND INNER WALL OF THE BORE; A PLURALITY OF RECESSES IN THE OUTER SIDES OF THE HANGER BODIES, PASSAGES THROUGH THE WALL OF THE BODY ALIGNED WITH THE RECESSES, AND RETRACTABLE HOLDDOWN SCREWS EXTENDING THROUGH THE WALL OF THE HEAD AND ADAPTED TO EXTEND THROUGH THE PASSAGES IN THE WALL OF THE BODY, AND ENGAGEABLE WITH ALIGNED RECESSES IN THE HANGER BODIES TO HOLD THE HANGER BODIES AGAINST UPWARD MOVEMENT.