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US 2012/0074690 A1Published application
Step-to-step wedge thread connections and related methods
AssigneeHydril Company
InventorsDavid Llewellyn Mallis, Gary W. Ward
Life of this patent
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Abstract
A threaded connection includes a pin member comprising a first pin step and a second pin step, and pin wedge threads disposed on each of the first and second pin steps and a box member comprising a first box step and a second box step, and box wedge threads disposed on each of the first and second box steps, wherein an axial separation of the first and second pin steps differs from an axial separation of the first and second box steps.
Claims29
A threaded connection comprising:
- a pin member comprising a first pin step and a second pin step, and pin wedge threads disposed on each of the first and second pin steps;
- and
- a box member comprising a first box step and a second box step, and box wedge threads disposed on each of the first and second box steps;
- wherein an axial separation of the first and second pin steps differs from an axial separation of the first and second box steps.
1 more element
A threaded connection comprising:
- a pin member comprising a first pin step and a second pin step, and pin wedge threads disposed on each of the first and second pin steps;
- and
- a box member comprising a first box step and a second box step, and box wedge threads disposed on each of the first and second box steps;
- wherein the pin wedge threads on at least one of the first and second pin steps and the corresponding box wedge threads on at least one of the first and second box steps are axially misaligned.
1 more element
A method of making up a threaded connection, the method comprising:
- rotationally engaging a pin member having pin wedge threads with a box member having corresponding box wedge threads, wherein the pin and box wedge threads are formed on corresponding first and second pin and box steps of the pin and box members;
- and
- engaging opposing pin and box stab and load flanks at different times during makeup of the threaded connection.
Dependencies are inferred from the claim text.