Wells – Processes – Placing or shifting well part
Patent
1992-10-16
1994-06-14
Bui, Thuy M.
Wells
Processes
Placing or shifting well part
166120, 166134, E21B 2300
Patent
active
053201833
ABSTRACT:
A locking apparatus which includes a rupture disc, prevents a packer from setting while being lowered into a wellbore. When the rupture disc ruptures, the packer can then set. The locking apparatus includes a locking sleeve for holding a locking dog into a locking recess in a mandrel. A drag block is locked to the mandrel as long as the locking dog is held into the locking recess of the mandrel. A packer connected to the mandrel is prevented from setting as long as the drag block is locked to the mandrel. Pressure in an annulus around the locking sleeve increases until it exceeds a predetermined threshold pressure value. When the annulus pressure exceeds the threshold pressure value, a rupture disc in the locking sleeve ruptures thereby allowing the annulus pressure to enter a chamber and move the locking sleeve away from the locking dog. When the locking sleeve moves away from the locking dog, any subsequent longitudinal movement of the mandrel moves the locking dog out of its locking recess. When the locking dog moves out of its locking recess, a sleevlet, connected to the locking dog, moves in the same direction as the locking dog thereby filling the locking recess originally occupied by the locking dog. When the sleevlet fills the locking recess, it is ratcheted in place thereby permanently filling the locking recess. When the locking recess is permanently filled, the lock is permanently removed. Therefore, the mandrel is free to move longitudinally relative to the drag block. As a result, the packer can be either set or unset simply by moving the mandrel longitudinally in the wellbore.
REFERENCES:
patent: 4474242 (1984-10-01), Upchurch
patent: 4553598 (1985-11-01), Meek
patent: 4576234 (1986-03-01), Upchurch
patent: 4597439 (1986-07-01), Meek
patent: 4610308 (1986-09-01), Meek
patent: 4660637 (1987-04-01), McGill et al.
patent: 4669539 (1987-06-01), Barrington
patent: 4671354 (1987-06-01), Henderson et al.
patent: 4730670 (1988-03-01), Kim
patent: 4898245 (1990-02-01), Braddick
patent: 4979569 (1990-12-01), Anyan et al.
patent: 4989672 (1991-02-01), Burns, Sr. et al.
patent: 5046557 (1991-09-01), Manderscheid
patent: 5103901 (1992-04-01), Greenlee
patent: 5148866 (1992-09-01), Greenlee
Muller Laurent E.
Vovers Anthony P.
Bouchard John H.
Bui Thuy M.
Garrana Henry N.
Schlumberger Technology Corporation
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