Wells – Processes – Disassembling well part
Patent
1986-07-15
1987-09-22
Novosad, Stephen J.
Wells
Processes
Disassembling well part
166 551, 166297, 175 456, E21B 2300, E21B 4311
Patent
active
046948783
ABSTRACT:
A disconnect sub for a tubing conveyed perforating gun is shown which includes a tubular member and a sliding mandrel telescopingly received within the interior of the tubular member. A perforating gun is supported by the lower end of the sliding mandrel and the mandrel has an upper colleted end which is initially retained within the tubular member on an internal profile. A retaining sleeve has a lower extent which initially underlies the colleted end of the sliding mandrel within the tubular member. After firing the perforating gun, the sliding mandrel is released by draining an initially filled fluid chamber within the device and by locking the retaining sleeve out of engagement with the colleted end of the mandrel, thereby allowing the mandrel to slide from within the tubular member and fall away within the well bore.
REFERENCES:
patent: 2876843 (1959-03-01), Huber
patent: 3366182 (1968-01-01), Solum
patent: 4040482 (1977-08-01), Vann
patent: 4364587 (1982-12-01), Samford
patent: 4523643 (1985-01-01), McGlothen
patent: 4526233 (1985-07-01), Stout
patent: 4554981 (1985-12-01), Davies
patent: 4557331 (1985-12-01), Stout
patent: 4560000 (1985-12-01), Upchurch
patent: 4616718 (1986-10-01), Gambertoglio
patent: 4633945 (1987-01-01), Upchurch
Bagnell David J.
Gunter Jr. Charles D.
Hughes Tool Company
Novosad Stephen J.
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