Apparatus and method to form centralizer blades on wellbore tubular
AssigneeWeatherford Technology Holdings, LLC
InventorMicheal Bock
Life of this patent
Estimating the term…
Abstract
A tubular is prepared for downhole use to include integrated centralizer feature disposed thereon. Blade elements are disposed about a surface of the tubular. An interconnection, such as a band, connected between the blade elements can be used to wrap them circumferentially about the tubular. The blade elements are then affixed to the surface of the tubular to produce the integrated centralizer features by coating a spray welding material over at least a portion of the plurality of blade elements and over at least an adjacent portion of the surface of the tubular. The blade elements can be hollow vanes or fins so they are collapsible when a restriction is encountered downhole to avoid a stuck pipe situation.
Claims21
A method of preparing a tubular for downhole use, the method comprising:
- placing a plurality of blade elements about a surface of the tubular, each of the plurality of blade elements comprising a hollow vane having a bent contour with a concave face and a convex face, wherein placing the plurality of blade elements about the surface of the tubular comprises placing the concave face against the surface of the tubular;
- and
- affixing the plurality of blade elements to the surface of the tubular by coating a spray welding material over at least a portion of the plurality of blade elements and over at least an adjacent portion of the surface of the tubular.
A method of preparing a tubular for downhole use, the method comprising:
- placing a plurality of blade elements about a surface of the tubular by wrapping at least one interconnecting element about the surface of the tubular, the at least one interconnecting element interconnecting the plurality of blade elements;
- and
- affixing the plurality of blade elements to the surface of the tubular by coating a spray welding material over at least a portion of the plurality of blade elements and over at least an adjacent portion of the surface of the tubular.
A tubular, comprising:
- a plurality of blade elements disposed about a surface of the tubular;
- at least one interconnecting element connected between the blade elements;
- and
- a spray welding material coated over at least a portion of the plurality of blade elements, over the at least one interconnecting element, and over at least an adjacent portion of the surface of the tubular,
- wherein each of the blade elements comprises a hollow vane having a bent contour with a concave face and a convex face, the concave face being placed against the surface of the tubular;
- and wherein the spray welding material is coated over at least a portion of an edge on the convex face of the hollow vanes.
A tubular, comprising:
- a plurality of blade elements disposed about a surface of the tubular;
- at least one interconnecting element connected between the blade elements;
- and
- a spray welding material coated over at least a portion of the plurality of blade elements, over the at least one interconnecting element, and over at least an adjacent portion of the surface of the tubular,
- wherein each of the plurality of blade elements comprises at least one of an elongated blade, vane, fin, and rib having a longitudinal length between opposing ends, having a width between opposing sides, and having a thickness between first and second face, the first face positioned against the surface of the tubular;
- and wherein the spray welding material is coated over at least a portion of the second face.
Dependencies are inferred from the claim text.