Wear resistant drill pipe
AssigneeNational Oilwell Varco, L.P.
InventorJohn Forester Price
Life of this patent
Estimating the term…
Abstract
Embodiments relate generally to preventing wear to a nominal thickness of a wall of a drill pipe during a downhole operation. A drill pipe may include a first tool joint; a second tool joint; and a tubular section between the first tool joint and the second tool joint, wherein the tubular section comprises a wall with an overall thickness comprising a nominal thickness and a secondary thickness, wherein the secondary thickness is outer to the nominal thickness and is configured to abrade against a wall of the wellbore, thereby reducing the secondary thickness and maintaining the nominal thickness, wherein an ID of each tool joint is less than an ID of the tubular section to accommodate for threaded connectors.
Claims20
A drill pipe comprising:
- a first tool joint;
- a second tool joint;
- and
- a tubular section between the first tool joint and the second tool joint, wherein the tubular section comprises a wall with an overall thickness comprising a nominal thickness and a secondary thickness, wherein the secondary thickness is outer to the nominal thickness and is configured to abrade against a wall of a wellbore, thereby reducing the secondary thickness and maintaining the nominal thickness, wherein an ID of each tool joint is less than an ID of the tubular section to accommodate for threaded connectors.
A drill pipe comprising:
- a first tool joint;
- a second tool joint;
- and
- a tubular section between the first tool joint and the second tool joint, wherein the tubular section comprises a wall with an overall thickness comprising a nominal thickness and a secondary thickness,
- wherein the secondary thickness is outer to the nominal thickness,
- wherein the tubular section does not contain mid-tube welds,
- wherein a weight per length of the drill pipe is less than a weight per length of a heavy weight drill pipe having a similar outer diameter to that of the drill pipe.
A method for preventing a reduction in a nominal thickness of a drill pipe, the method comprising:
- positioning the drill pipe in a wellbore, wherein a wall of the drill pipe comprises an overall thickness comprising the nominal thickness and a secondary thickness, wherein the secondary thickness is outer to the nominal thickness;
- manipulating the drill pipe in the wellbore, causing the drill pipe's outer surface to contact a wall of the wellbore;
- reducing the secondary thickness due to abrasive forces between the wall of the wellbore and the drill pipe;
- and
- maintaining the nominal thickness.
Dependencies are inferred from the claim text.