Scalloped wedge threads
View Patent ↗A threaded connection between adjacent tubular members includes a pin member providing an external wedge thread and a box member providing an internal wedge thread, wherein the internal wedge thread corresponds with the external wedge thread. Further, the threaded connection includes at least one interruption along a helical thread length of one of the external wedge thread and the internal wedge thread and at least two regions along an axial length of the threaded connection where the external wedge thread and the internal wedge thread form a thread seal.
1. A downhole threaded connection between adjacent tubular members, the threaded connection comprising:
a pin member providing a single continuous external wedge thread;
a box member providing a single continuous internal wedge thread;
wherein the internal wedge thread corresponds with the external wedge thread;
a plurality of interruptions formed in thread crests of the external and internal wedge threads and arranged along helical thread lengths of the external and internal threads;
wherein the plurality of interruptions are spaced along the helical thread lengths such that a helical thread length of at least two revolutions of continuous root/crest contact exists between at least two of the plurality of interruptions;
wherein the plurality of interruptions are volumetrically sized to trap pipe dope from adjacent threads along the helical thread lengths.
2. The threaded connection of claim 1 , wherein the plurality of interruptions are equally spaced along the helical thread lengths.
3. The threaded connection of claim 1 , wherein at least one of the adjacent tubular members has an outer diameter at least 20 times greater than a wall thickness.
4. The threaded connection of claim 1 , wherein the helical thread length of the one of the pin member and the box member is greater than about 200 inches.
5. The threaded connection of claim 1 , wherein the helical thread length of the one of the pin member and the box member is greater than about 250 inches.
6. The threaded connection of claim 1 , wherein a helical thread length of the other of the pin member and the box member is greater than about 200 inches.
7. The threaded connection of claim 1 , wherein the helical thread length of the other of the pin member and the box member is greater than about 250 inches.
8. The threaded connection of claim 1 , wherein at least one of the pin member and the box member has an eccentric cross section prior to make-up.
9. The threaded connection of claim 1 , wherein at least one interruption comprises a circumferential cut.
10. The threaded connection of claim 1 , wherein at least one interruption comprises a radial cut.