Locking ring for oil well tool

Details Locking ring for oil well tool Locking ring for oil well tool

1989-04-14

1990-02-27

Callaghan, Thomas F.

Pipe joints or couplings

With assembly means or feature

Guide and support

285141, 285307, 285321, 285334, F16L 1500

Patent

active

049039920

ABSTRACT:
A connection assembly secured a running tool into a tubular casing hanger. The connection assembly includes a frusto-conical threaded section on a running tool and a nose section of cylindrical shape located below the threaded section. The casing hanger has a bore with at least one circumferential recess. A collet ring having internal threads is initially carried on the nose section. The collet ring lands in the recess when the running tool is moved into the casing hanger. Continued movement causes the collet ring to deflect outward. The collet ring has threads on its inner diameter that slide on the threads of the running tool to latch the members together. Slots in the collet ring enable the outward deflection to occur. A pin engages the collet ring to enable rotation of the running tool relative to the collet ring to unscrew the members from each other.

REFERENCES:
patent: 2542679 (1951-02-01), Kemnitz
patent: 2737248 (1956-03-01), Baker
patent: 2849245 (1958-08-01), Baker
patent: 4410204 (1983-10-01), Reimert
patent: 4534583 (1985-08-01), Milberger et al.
patent: 4607865 (1986-08-01), Hughes
patent: 4655479 (1987-04-01), Farr, Jr.
patent: 4714111 (1987-12-01), Brammer
patent: 4773477 (1988-09-01), Putch
patent: 4844510 (1989-07-01), Theiss et al.

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