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US 9,803,449 B2Granted
Pin-less composite sleeve or coupling to composite mandrel or shaft connections
AssigneeCCDI Composites, Inc.
InventorsFrederick A. Good, III, Dennis E. Sherlin, Jack A. Shippy
Life of this patent
Estimating the term…
Abstract
Methods, devices, and systems of downhole tools are disclosed. The tools each has a sleeve attached to a mandrel to form a composite frac or bridge plug or similar coupling to a downhole tool tubing product without the use of shear pins. The engagement between the mandrel and the sleeve includes a load breaking ledge, threads, ring and groove combination, and helical spiral groove with a helical coil.
Claims20
A composite downhole tool comprising:
- a tubular sleeve comprising an exterior surface and an interior surface defining a sleeve bore, said tubular sleeve being made from a composite material and comprises a plurality laminate layers including an inner most laminate layer defining, at least in part, the bore and an outer most laminate layer defining, at least in part, the exterior surface;
- a mandrel comprising an exterior surface and an interior surface defining a lengthwise bore, said mandrel being made from a composite material and comprises a plurality laminate layers including an inner most laminate layer defining, at least in part, the lengthwise bore and an outer most laminate layer defining, at least in part, the exterior surface;
- a groove formed in the bore of the tubular sleeve and through several layers of the plurality of laminate layers of the tubular sleeve and a groove formed on an exterior of the mandrel and through several layers of the plurality of laminate layers of the mandrel, the groove of the tubular sleeve and the groove of the mandrel aligned to define a common groove having a cavity with an enclosed cross-section with a seam between the inner most laminate layer of the tubular sleeve and the outer most laminate layer of the mandrel;
- and
- wherein the tubular sleeve is coupled to the mandrel, the inner most laminate layer of the tubular sleeve is bonded to the outer most laminate layer of the mandrel, and a common component that is not a pin is located in the common groove so that at least some of the several laminate layers of the tubular sleeve and of the several laminate layers of the mandrel abut the common component to distribute load across multiple different laminate layers.
2 more elements
A method for forming a downhole tool comprising:
- forming a composite tubular sleeve with a plurality of laminate layers, said tubular sleeve comprising an exterior surface and an interior surface defining a sleeve bore;
- forming a cut in the interior surface of the sleeve to form a groove and to expose several laminate layers at the groove but no hole or bore on the exterior surface of the sleeve;
- forming a composite mandrel with a plurality of laminate layers, said composite mandrel comprising an exterior surface and an interior surface defining a lengthwise bore;
- forming a cut on the exterior surface of the mandrel to form a groove and to expose several laminate layers at the groove;
- coupling the sleeve to the mandrel so that the groove of the sleeve and the groove of the mandrel form a common groove having a cavity with an enclosed cross-section with a seam between the interior surface of the sleeve and the exterior surface of the mandrel;
- positioning a common component that is not a pin in the common groove so that at least some of the several laminate layers of the tubular sleeve and of the several laminate layers of the mandrel abut the common component to distribute load across multiple different laminate layers;
- and
- applying adhesive at the interface between the interior surface of the sleeve and the exterior surface of the mandrel.
5 more elements
Dependencies are inferred from the claim text.