Wells – Expansible anchor or casing – Fluid pressure actuated
Patent
1981-07-23
1983-11-15
Novosad, Stephen J.
Wells
Expansible anchor or casing
Fluid pressure actuated
166217, 166 551, 166 63, E21B 2304, E21B 2902
Patent
active
044150296
ABSTRACT:
Downhole well tools and anchoring means therefore including a chemical cutting tool having improved slip actuating and slip array assemblies. The cutting tool includes a slip shaft provided with fluid passageway and having a slip array slidably disposed thereon. The tool further includes slip expansion means secured to the shaft adjacent to the slip array. A piston sleeve is slidably disposed on the shaft and connected to the slip array and defines a piston chamber in fluid communication with the shaft passageway such that the application of fluid pressure drives the piston sleeve and slip array to a deployed position in which the slip array is expanded. Biasing means located externally of the piston sleeve function to bias the piston sleeve to a retracted position upon release of fluid pressure. The slip array is comprised of spaced slip segments which are biased inwardly by means of cantilever springs secured to a structural member of the logging tool.
REFERENCES:
patent: 2603163 (1952-07-01), Nixon
patent: 2874784 (1959-02-01), Baker et al.
patent: 3406758 (1968-10-01), Page
patent: 3741302 (1973-06-01), Brown
patent: 4180131 (1979-12-01), Chammas
patent: 4345646 (1982-08-01), Terrell
Pratt Donna K.
Terrell Jamie B.
Gearhart Industries, Inc.
Jackson William D.
Novosad Stephen J.
Starinsky Michael
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