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US 2012/0067649 A1Published application
Slip free drill pipe
AssigneeNational Oilwell Varco, L.P.
InventorGerald E. Wlson
Life of this patent
Estimating the term…
Abstract
A drill pipe includes a pin-type connector part, a box-type pipe connector part, a tube part attached to the pin-type pipe connector part, and an intermediary pipe part disposed between and attached to the box-type pipe connector part and the tube part. The intermediary pipe part has a shoulder for engagement with a handling tool.
Claims13
A drill pipe, comprising:
- a pin-type pipe connector part;
- a box-type pipe connector part;
- a tube part attached to the pin-type pipe connector part;
- and
- an intermediary pipe part disposed between and attached to the box-type pipe connector part and the tube part, the intermediary pipe part having a shoulder for engagement with a handling tool.
2 more elements
A method of making a drill pipe, comprising:
- (a) attaching a pin-type pipe connector part to a tube part;
- (b) attaching an intermediary pipe part to the tube part, the intermediary pipe part having a shoulder for engagement with a handling tool;
- and
- (c) attaching a box-type pipe connector part to the intermediary pipe part.
1 more element
A method of making a drill pipe, comprising:
- (a) integrally forming an intermediary pipe part with a box-type pipe connector part, the intermediary pipe part having a shoulder for engagement with a handling tool;
- (b) attaching a tube part to the intermediary pipe part;
- and
- (c) attaching a pin-type pipe connector part to the tube part.
1 more element
Dependencies are inferred from the claim text.