Wells – With electrical means
Patent
1990-10-11
1992-01-14
Dang, Hoang C.
Wells
With electrical means
166242, E21B 1700
Patent
active
050801686
ABSTRACT:
A locking device allows a cable to be immobilized in translation in relation to a side wall entry sub inserted in a string of tubular elements taken down into a well bore as long as the tractive forces that can be applied to the cable remain limited. The locking device includes a tubular coupling made of two complementary parts which can be tightened around the cable with screws of a limited resistance and an insert fastened in a recess of the sub fitted with a cylindrical inner cavity which can contain the coupling and prevent its translation while leaving it free to turn around on itself. The insert is fitted with a mouthpiece adapted for releasing the cable from the coupling when a thrust load exerted on the cable is sufficient for breaking the screws.
REFERENCES:
patent: 4200297 (1980-04-01), Tricon
patent: 4388969 (1983-06-01), Marshall et al.
patent: 4457370 (1984-07-01), Wittrisch
patent: 4506729 (1985-03-01), Davis, Jr. et al.
patent: 4524834 (1985-06-01), Barron et al.
patent: 4603578 (1986-08-01), Stoltz
patent: 4607693 (1986-08-01), Richardson
patent: 4877095 (1989-10-01), Wittrisch
patent: 4913227 (1990-04-01), Wittriseh
Dang Hoang C.
Institut Francais du Pe'trole
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