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AssigneeShawcor Ltd.
InventorsDilip K. Tailor, Michael Verge, Robert E. Steele, John H. Oliver, Jeffery A. D. State, Sean A. Haberer
Estimating the term…
A casing member for forming a connection between tubular sections. The member has heat shrinkable end portions, for connecting on respective adjacent end surfaces of the tubular sections adjacent the joint, and a middle portion for spanning between the end surfaces of the tubular sections. The end portions are formed integrally with at least a portion of the middle portion and have a zone that has a relatively small wall thickness while the middle portion having a relatively large wall thickness. This member may be made by heat shrinking a sleeve on an inner core on a mandrel or by uniting opposed ends of a heat shrink sheet having one or more auxiliary layers bonded to it. The properties of the core or auxiliary layer or layers may be tailored to provide desired properties or capabilities.
A casing member for forming a connection between tubular sections having respective end surfaces, the member having heat shrinkable end portions, for connecting on said respective adjacent end surfaces of said tubular sections, and a middle portion for spanning between said end surfaces of said tubular sections, said end portions formed integrally with at least a portion of the middle portion and comprising a zone having a relatively small wall thickness and the middle portion having a relatively large wall thickness, said zones of the end portions being caused to shrink while said middle portion remains unshrunk and remains solid and not melting or flowing when said zones and said middle portion are exposed to similar heat flux for a similar period of time.
A casing member for forming a connection between tubular sections comprising a tubular sleeve having end zones, and wherein at least said end zones are heat shrinkable, said sleeve comprising first and second coaxial plastic sleeve portions bonded together, wherein the second plastic sleeve portion has a degree of crosslinking substantially less than the first plastic sleeve portion, and said tubular sleeve having a hole through said first and second plastic sleeve portions for introducing a liquid precursor of a foam composition to the interior of the tubular sleeve.
A method of forming a composite sleeve member having heat shrinkable end portions comprising disposing an inner covering member on a mandrel, disposing around the inner member and mandrel a sleeve formed from a sheet that is heat shrinkable in the circumferential direction, said sheet having edge portions and said edge portions of the sheet being bonded together at an overlap portion, said sleeve extending beyond either end of the inner member, shrinking the sleeve to conform to the inner member and mandrel, bonding the shrunk sleeve to the inner member to form a composite sleeve member, and removing the composite sleeve member from the mandrel.
A method of forming a composite sleeve member for forming a connection between tubular sections, having heat shrinkable end portions comprising providing a first layer that is heat shrinkable in a heat shrink direction, laminating a second layer to the first layer to form a laminate wherein the second layer has sides disposed inwardly from the margins of the first layer and wherein said laminate has edge portions that are spaced apart in the heat shrink direction, and bonding said edge portions together at an overlap portion, said second layer remaining solid and not melting or flowing at the temperature at which the end portions commence heat shrinking during the forming of said connection.
Dependencies are inferred from the claim text.