Spiral banding
AssigneeRodDoc LLC
InventorFrank Dougherty
Life of this patent
Estimating the term…
Abstract
Various processes for the addition or build-up of material such as base metals or alloys onto tool joints and/or threads of drill pipe typically used in, but not limited to, the gas and oil industry are disclosed. In one example, a spiral delivery of material is described, as well as, a machine that delivers the material onto the tool joints and/or threads of drill pipe. Variables can be temperature used during pre-heat, application, inter-pass and/or post process, electrical current used (AC/DC), volts, amps, wire type and size, cooling process, width and depth of bead applied, rotation, and travel speed.
Claims20
A spiral-banded drill pipe, comprising:
- a pin end, a box end, and a shaft that extends between the pin end and the box end, and
- a continuous bead of welding material that is deposited on an exterior surface of the pin end, and spirals around a portion of the pin end.
A spiral-banded drill pipe, comprising:
- a pin end, a box end, and a shaft that extends between the pin end and the box end, and
- a continuous bead of welding material that is deposited on an exterior surface of the box end, and spirals around a portion of the box end.
A spiral-banded drill pipe, comprising:
- a pin end having a threaded tip, wherein the threaded tip of the pin end includes threading on an exterior surface of the pin end;
- a box end having a threaded tip, wherein the threaded tip of the box end includes threading on an interior surface of the box end;
- a shaft that extends between the pin end and the box end;
- a first spiral band of welding material deposited on an exterior surface of the pin end;
- and
- a second spiral band of welding material deposited on an exterior surface of the box end.
Dependencies are inferred from the claim text.