Threads with perturbations
AssigneeHydril Company
InventorHarris A. Reynolds, Jr.
Life of this patent
Estimating the term…
Abstract
A threaded connection including a pin member and a box member, and methods for manufacturing and forming said threaded connection. The pin member has a pin thread with a pin thread crest, a pin thread root, a pin load flank, and a pin stab flank. The box member has a box thread with a box thread crest, a box thread root, a box load flank, and a box stab flank. At least one of the pin thread crest, the pin load flank, the pin stab flank, the box thread crest, the box load flank, and the box stab flank has at least one perturbation formed thereon. Upon a selected make-up of the pin member with the box member, an increased contact stress exists between the pin thread and the box thread at the at least one perturbation.
Claims12
A threaded connection comprising:
- a pin member comprising a pin thread having a pin thread crest, a pin thread root, a pin load flank, and a pin stab flank;
- a box member comprising a box thread having a box thread crest, a box thread root, a box load flank, and a box stab flank, and
- wherein a lead of at least one of the pin load flank, the pin stab flank, the box load flank, and the box stab flank has at least one perturbation formed therein,
- wherein upon a selected make-up of the pin member with the box member, an increased contact stress exists between the pin thread and the box thread at the at least one perturbation;
- wherein the at least one perturbation is constructed to form a thread seal between the pin thread and the box thread.
A threaded connection, comprising:
- a pin member comprising a pin thread to cooperatively engage a box thread of a box member;
- wherein a width of at least one of the pin thread and the box thread varies along a thread length according to a pre-determined function;
- at least one perturbation formed in the at least one of the pin thread and the box thread, wherein the perturbation comprises a deviation from a path of the pre-determined function and a return to the pre-determined function;
- wherein upon a selected make-up of the pin member with the box member, an increased contact stress exists between the pin thread and the box thread at the at least one perturbation.
The threaded connection of clam 10, wherein at least one of the pin member and the box member comprises a wedge thread.
Dependencies are inferred from the claim text.