US 11,885,443 B2
Threaded connection having a dissymmetrical helical profile
Anthony Foulogne, Boulogne-Billancourt (FR); and Pierre Martin, Boulogne-Billancourt (FR)
Assigned to VALLOUREC OIL AND GAS FRANCE, Aulnoye-Aymeries (FR); and NIPPON STEEL CORPORATION, Chiyoda-ku (JP)
Appl. No. 17/628,131
Filed by VALLOUREC OIL AND GAS FRANCE, Aulnoye-Aymeries (FR); and NIPPON STEEL CORPORATION, Chiyoda-ku (JP)
PCT Filed Jul. 15, 2020, PCT No. PCT/EP2020/069948
§ 371(c)(1), (2) Date Jan. 18, 2022,
PCT Pub. No. WO2021/013645, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 19 08204 (FR), filed on Jul. 19, 2019.
Prior Publication US 2022/0260186 A1, Aug. 18, 2022
Int. Cl. F16L 15/06 (2006.01); E21B 17/042 (2006.01); F16L 15/00 (2006.01)
CPC F16L 15/06 (2013.01) [E21B 17/0423 (2013.01); F16L 15/002 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A threaded tubular connection for the drilling and/or exploitation of hydrocarbon wells, comprising a first tube equipped at a first distal end with a male tool joint and a second tube equipped at a second distal end with a female tool joint, the male tool joint being capable of being assembled by makeup with the female tool joint, the first tube assembled to the second tube together define a longitudinal axis,
the male tool joint comprising a male threaded portion,
the female tool joint comprising a female threaded portion engaged with the male threaded portion when the connection is assembled,
the male and female threaded portions each comprising at least one helix equipped with a load flank, a thread crest, a stabbing flank, a thread root, such that a pitch of the load flank LFLp and a pitch of the stabbing flank SFLp of the male threaded portion, and respectively a pitch of the load flank LFLb and a pitch of the stabbing flank SFLb of the female threaded portion fulfil the following condition, for at least two consecutive turns of the respective helices of the male and female threaded portions:
SFLp=LFLp=SFLb=LFLb=k  [Math 14]
and such that along the longitudinal axis, in these at least two consecutive turns, a tooth width (Wtp) of the helix of the male threaded portion and a tooth width (Wtb) of the helix of the corresponding female threaded portion are such that

OG Complex Work Unit Math