Threaded connection for drilling and operating hydrocarbon wells
View Patent ↗A set for manufacturing a threaded connection, including first and second tubular components with an axis of revolution, one of their ends including a threaded zone formed on the external or internal peripheral surface of the component depending on whether the threaded end is of male or female type, the ends finishing in a terminal surface. The threaded zones include, over at least a portion, threads including, viewed in longitudinal section passing through the axis of revolution of the tubular components, a thread crest, a thread root, a load flank, and a stabbing flank, the width of the thread crests of each tubular component reducing in the direction of the terminal surface of the tubular component under consideration, while the width of the thread roots increases, profiles of the load flanks and/or the stabbing flanks of the male and female threaded zones, viewed in longitudinal section passing through the axis of revolution of the tubular components, each having at least one identical portion such that the male and female threads can be fitted one into the other over the identical portions when the first and second tubular components are made up one into the other. The identical portions of the male and female ends are radially offset with respect to each other.
1. A threaded connection, comprising:
a first and a second tubular component with an axis of revolution, one of their ends including a threaded zone formed on an external or internal peripheral surface of the component depending on whether the threaded end is male or female, the ends finishing in a terminal surface,
the threaded zones comprising, over at least a portion, threads comprising, viewed in longitudinal section passing through the axis of revolution of the tubular components,
thread crests, a width of the thread crests of each tubular component reducing in the direction of the terminal surface of the tubular component under consideration,
thread roots, a width of the thread roots of each tubular component increasing in the direction of the terminal surface of the tubular component under consideration,
load flanks, and stabbing flanks with, viewed in a longitudinal section passing through the axis of revolution of the tubular components, at least one of the male load flanks or the male stabbing flanks having first profiles, and at least one of the female load flanks or the female stabbing flanks having second profiles, wherein the first profiles and the second profiles have at least one identical portion such that the male and female threads can be fitted one into the other over the identical portions of the first and second profiles when the first and second tubular components are made up one into the other,
wherein the identical portions of the first and second profiles are radially offset with respect to each other during make-up, and
wherein the identical portions of the first and second profiles include a first at least one convex or concave segment on the first profile, and a second at least one concave or convex segment on the second profile which complements the first at least one convex or concave segment on the first profile.
2. A threaded connection according to claim 1 , wherein a distance of the portion of at least one of the load flanks or the stabbing flanks of the male threaded zone from the axis of revolution is smaller than a distance of the corresponding portion of the corresponding flanks of the female threaded zone from the axis of revolution.
3. A threaded connection according to claim 1 , wherein a distance of the portion of at least one of the load flanks or the stabbing flanks of the male threaded zone from the axis of revolution is greater than a distance of the corresponding portion of the corresponding flanks of the female threaded zone from the axis of revolution.
4. A threaded connection according to claim 1 , wherein a distance of the portion of at least one of the load flanks or the stabbing flanks of the male threaded zone from the axis of revolution differs from a distance of the portion of the corresponding flanks of the female threaded zone from the axis of revolution by a value in a range of 0.01 to 0.05 mm.
5. A threaded connection according to claim 4 , wherein the distance of the portion of the at least one of the load flanks or the stabbing flanks of the male threaded zone from the axis of revolution differs from the distance of the portion of the corresponding flanks of the female threaded zone from the axis of revolution by a value substantially equal to 0.02 mm.
6. A threaded connection according to claim 1 , wherein the portions of the load flanks and/or the stabbing flanks of the male and female threaded zones are constituted by two segments connected together tangentially via a first radius of curvature.
7. A threaded connection according to claim 6 , wherein the two segments connected together tangentially via a radius of curvature form an angle in a range 90 to 120 degrees.
8. A threaded connection according to claim 1 , wherein the identical portions of at least one of the load flanks or the stabbing flanks of the male and female threaded zones are connected to at least one of the thread crest or root by a radius of curvature.
9. A threaded connection according to claim 1 , wherein the threaded zones each include a taper generatrix forming an angle with the axis of revolution of the tubular components.
10. A threaded connection according to claim 1 , wherein the thread crests and roots are parallel to the axis of the tubular component.
11. A threaded connection according to claim 1 , wherein the male and female ends each respectively comprise a sealing surface, each sealing surface configured to cooperate in tightening contact with each other when the portions of the threaded zones cooperate following self-locking make-up.
12. A threaded connection according to claim 11 , wherein the threaded connection is a threaded connection of a drilling component.