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Patent Searching and Data


Title:
SLIM TYPE OIL WELL PIPE FITTING
Document Type and Number:
WIPO Patent Application WO/2001/075347
Kind Code:
A1
Abstract:
A threaded oil well pipe fitting of integral system capable of assuring a joint efficiency to withstand a practical use as an oil well pipe fitting for deep well, reducing the outside diameter thereof, and increasing a bending resistance capability, compression resistance capability, and over-torque resistance capability necessary when a side track system is adopted, wherein a fitting efficiency is 70% or higher, a fitting outside diameter is larger than and 1.08 times or less the outside diameter of an oil well pipe main body, and a threaded part cross section is formed in a trapezoidal shape of 0 to -20 degrees in thread load surface flank angle ($g(a)) and 35 to 50 degrees in thread insert surface flank angle ($g(u)).

Inventors:
SUMITANI KATSUTOSHI (JP)
MAEDA JUN (JP)
NAGASAKU SHIGEO (JP)
Application Number:
PCT/JP2001/002609
Publication Date:
October 11, 2001
Filing Date:
March 29, 2001
Export Citation:
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Assignee:
SUMITOMO METAL IND (JP)
SUMITANI KATSUTOSHI (JP)
MAEDA JUN (JP)
NAGASAKU SHIGEO (JP)
International Classes:
E21B17/042; F16L15/06; (IPC1-7): F16L15/06
Foreign References:
JPS57122883U1982-07-30
JPH09119564A1997-05-06
JPH1089554A1998-04-10
Other References:
See also references of EP 1271037A4
Attorney, Agent or Firm:
Hirose, Shoichi (Nihonbashi Honcho 4-chome Chuo-ku Tokyo, JP)
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