US 12,264,758 B2
Threaded joint
Federico Guillermo Klein, Buenos Aires (AR); and Adam Hasskamp, Houston, TX (US)
Assigned to Tenaris Connections B.V., Amsterdam (NL)
Appl. No. 18/005,034
Filed by Tenaris Connections B.V., Amsterdam (NL)
PCT Filed Jul. 13, 2021, PCT No. PCT/EP2021/069410
§ 371(c)(1), (2) Date Jan. 10, 2023,
PCT Pub. No. WO2022/013193, PCT Pub. Date Jan. 20, 2022.
Claims priority of application No. 20185444 (EP), filed on Jul. 13, 2020.
Prior Publication US 2023/0250902 A1, Aug. 10, 2023
Int. Cl. F16L 15/06 (2006.01); F16L 15/00 (2006.01); E21B 17/042 (2006.01)
CPC F16L 15/06 (2013.01) [F16L 15/001 (2013.01); E21B 17/042 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A tubular threaded joint comprising: a first tubular member comprising a pin, and a second tubular member comprising a box, wherein:
the pin is an end portion of the first tubular member comprising a radially outward-facing surface, and the radially outward-facing surface comprises a male threaded zone comprising a tapered male thread;
the box is an end portion of the second tubular member comprising a radially inward-facing surface, and the radially inward-facing surface comprises a female threaded zone comprising a tapered female thread;
the male thread and female thread are configured to engage with each other when the joint is in a made-up state;
the male thread and female thread are each trapezoidal and comprise a crest, a root, a load flank, and a stabbing flank;
on each of the male thread and the female thread at least one of the load flank and the stabbing flank is negatively inclined;
a first portion of the male thread extending from an end thereof comprises a first taper relative to a longitudinal axis of the first tubular member;
a first portion of the female thread extending from an end thereof comprises a second taper relative to a longitudinal axis of the second tubular member, the first portion of the male thread and the first portion of the female thread are configured to engage with each other when the joint is in the made-up state;
the second taper is different from the first taper such that the threads converge toward an end of the threads in the made-up state;
the female thread comprises a distal end nearest a terminal end of the box and a proximal end opposite the distal end;
the female thread comprises a complete portion and an incomplete portion, the incomplete portion being at the proximal end of the female thread; and
the crest of the incomplete portion of the female thread defines a surface selected from the group consisting of a cylindrical surface, a conical surface, and a cylindrical surface extending to a conical surface, wherein the conical surface is nearest the proximal end of the female thread.