Set for producing a threaded connection for drilling and operating hydrocarbon wells, and resulting threaded connection
View Patent ↗A threaded connection includes first and second tubular components each with an axis of revolution. The first component including a male threaded end, the second component including a female threaded end, and both the male and female threaded ends finishing in a terminal surface. The threaded zones include, over a portion defined as in a self-locking make-up, threads, which before the self-locking make-up and when viewed in a longitudinal section passing through the axis of revolution of the first and second components, each include: a thread crest, a thread root, a load flank, and a stabbing flank. A width of the thread crests of each component reducing in a direction of the terminal surface of the component under consideration, while a width of the thread roots increases. A lead of the male stabbing flanks and/or load flanks is different from a lead of the female stabbing flanks and/or load flanks.
1. A threaded connection, comprising:
a first tubular component and a second tubular component each with an axis of revolution, the first tubular component comprising a male threaded end including a threaded zone formed on an external peripheral surface of the first tubular component and the second tubular component comprising a female threaded end including a threaded zone formed on an internal peripheral surface of the second tubular component, both the male threaded end and the female threaded end finishing in a terminal surface,
the threaded zones comprising, over a portion defined as in a self-locking make-up, threads, which before the self-locking make-up and when viewed in a longitudinal section passing through the axis of revolution of the first and second tubular components, each comprising:
a thread crest,
a thread root,
a load flank, and
a stabbing flank,
a width of the thread crests of each of the first and second tubular components reducing in a direction of the terminal surface of the tubular component under consideration, while a width of the thread roots increases,
wherein at least one of
a lead of the stabbing flanks of the male threaded end is respectively different from a lead of the stabbing flanks of the female threaded end, and
a lead of the load flanks of the male threaded end is respectively different from a lead of the load flanks of the female threaded end,
the leads of the flanks remaining constant over the portion defined as in the self-locking make-up.
2. The threaded connection according to claim 1 ,
wherein at least one of
the lead of the male stabbing flanks is respectively smaller than the lead of the female stabbing flanks, and
the lead of the male load flanks is respectively smaller than the lead of the female load flanks,
a thickness of the first tubular component at an end of the threaded zone opposite the terminal surface being less than a thickness of the second tubular component.
3. The threaded connection according to claim 1 ,
wherein at least one of
the lead of the male stabbing flanks is respectively greater than the lead of the female stabbing flanks, and
the lead of the male load flanks is respectively greater than the lead of the female load flanks,
a thickness of the first tubular component at an end of the threaded zone opposite the terminal surface being greater than a thickness of the second tubular component.
4. The threaded connection according to claim 1 ,
wherein at least one of
a relative difference between the lead of the male stabbing flanks and the lead of the female stabbing flanks is in a range of 0.15% to 0.35%, and
a relative difference between the lead of the male load flanks and the lead of the female load flanks is in the range of 0.15% to 0.35%.
5. The threaded connection according to claim 1 ,
wherein at least one of
a relative difference between the lead of the male stabbing flanks and the lead of the female stabbing flanks is substantially equal to 0.25%, and
a relative difference between the lead of the male load flanks and the lead of the female load flanks is substantially equal to 0.25%.
6. The threaded connection according to claim 1 , wherein the threaded zones each have a taper generatrix forming an angle with the axis of revolution of the first and second tubular components.
7. The threaded connection according to claim 1 , wherein the thread crests and roots are parallel to the axis of revolution of the first and second tubular components.
8. The threaded connection according to claim 1 , wherein the threads of the first and second tubular components have a dovetail profile.
9. The threaded connection according to claim 1 ,
wherein at least one of the male and female thread crests have an interference fit with the roots of at least one of the female and male threads after the self-locking make-up.
10. The threaded connection according to claim 1 , wherein the threaded connection is a threaded connection for a drilling component.
11. The threaded connection according to claim 1 ,
wherein both the lead of the male stabbing flanks is respectively different from the lead of the female stabbing flanks and the lead of the male load flanks is respectively different from the lead of the female load flanks.