Method and apparatus for repairing casings and the like
AssigneeNu-Bore Systems
InventorCharles H. Koster
Life of this patent
Estimating the term…
Abstract
An improved and process for creating a lining in a bore transfers strip wrapped in overlapping spiral fashion about a mandrel to the bore wall such that the edge-to-edge relation of the spirally-wrapped strip is maintained from the mandrel to the bore wall. Adhesive is applied to the strip surface during wrapping thereof on the mandrel. The invention provides a new bore with a thin, strong, corrosion resistant lining over a preselected portion of its length that is substantially pressure tight internally and externally and leak proof thus permitting substantial reuse of the lined bore.
Claims4
A wrap-around collar for fastening the ends of a plurality of overlapping strips to an elongated cylindrical element to permit the spiral wrapping of said strips around and along the length of said element, each of said strips having an end portion adapted to be connected to said collar, said collar being formed of:
- a sheet of material of substantially rectangular shape having a front edge comprising a flap portion and an edge disposed rearwardly thereof for applying to said cylindrical element during wrap-around of said sheet about said element,
- a first collar attachment means disposed adjacent and along said rearward edge,
- a complementary second collar attachment means disposed intermediate said edge and adjacent said front edge for attachment to said first attachment means,
- the distance between said attachment means corresponding substantially to the circumference of said cylindrical element such that when said sheet is wrapped around said cylindrical element and the attachment means connected to each other to form a collar about said element, the collar is firmly held to said element with the edge of said flap portion freely extending,
- and a plurality of connecting means disposed along said freely extending edge to which the ends of said plurality of strips are separately connected in overlapping relationship to permit spiral wrapping thereof along the length of said cylindrical element.
Dependencies are inferred from the claim text.