Title:
疲労耐性斜面式ねじ込み管状要素
Document Type and Number:
Japanese Patent JP4746246
Kind Code:
B2
Abstract:
A fatigue resistant waisted threaded tubular element for threaded tubular connection, and resulting threaded tubular connection. The threaded tubular element is waisted by a groove formed in the material beneath the threading to reduce the stiffness of the wall at the level of the first engaging threads. The groove can prevent an increase in the transfer of tensile loads at the level of the first engaging threads of the threaded element on which it is formed and on the corresponding last engaging threads of the mating threaded element intended to be connected thereto to form a threaded tubular connection. This improvement in load transfer limits the risk of initiating a fatigue crack in threaded tubular connections subjected to a cyclic load without reducing their static performances.
Inventors:
Verdillon, Lionel
Application Number:
JP2001572788A
Publication Date:
August 10, 2011
Filing Date:
March 26, 2001
Export Citation:
Assignee:
Ballorec Manesmann Oil and Gas France
SUMITOMO METAL INDUSTRIES,LTD.
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
E21B17/042; F16L15/00
Domestic Patent References:
| JP58187684A | ||||
| JP9119565A |
Foreign References:
| FR1317815A1 |
Attorney, Agent or Firm:
Yuzo Yamazaki
Kenkyo Kanayama
Naoto Sugiyama
Kenkyo Kanayama
Naoto Sugiyama