Wells – Processes – Assembling well part
Patent
1990-07-25
1992-01-21
Dang, Hoang C.
Wells
Processes
Assembling well part
166115, 166217, 166237, 166242, 166382, 285391, E21B 2302
Patent
active
050820613
ABSTRACT:
A locking system utilizing metal seals for sealing and a rotary lock mandrel which is rotated to lock by a rotary running tool in a landing nipple in a well conduit. The lock mandrel has a metal sealing surface sealingly engageable with a metal seat in the landing nipple and orientors on a number of helically profiled segments which are rotatably engageable with mating profiled segments in the landing nipple. As the lock mandrel is lowered on the running tool into the landing nipple, lock mandrel segments are oriented between nipple segments, and the mandrel metal sealing surface engages the metal seat in the landing nipple. Downward jarring on the running tool rotates the mandrel segments into engagement with the landing nipple segments, locking the lock mandrel in the landing nipple, sealingly engaging the metal seal surface on the metal seat and releasing the running tool from the locking mandrel for retrieval from the well conduit.
REFERENCES:
patent: 1629058 (1927-05-01), Wilson
patent: 1896104 (1933-02-01), Simmons
patent: 2673614 (1954-03-01), Miller
patent: 2963101 (1960-12-01), Koppl
patent: 3208531 (1965-09-01), Tamplen
patent: 3216504 (1965-11-01), Roark
patent: 3442536 (1969-05-01), Fowler
patent: 4046405 (1977-09-01), Bonds
patent: 4538685 (1985-09-01), Pringle et al.
patent: 4915175 (1990-04-01), Mashaw, Jr.
patent: 4921044 (1990-05-01), Cooksey
Cox Roland O.
Dang Hoang C.
Otis Engineering Corporation
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