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Title:
METHOD FOR EVALUATING CONNECTION STATE OF PIPE THREAD COUPLING, METHOD FOR PIPE THREAD COUPLING CONNECTION, AND DEVICE FOR EVALUATING CONNECTION STATE OF PIPE THREAD COUPLING
Document Type and Number:
WIPO Patent Application WO/2010/113651
Kind Code:
A1
Abstract:
Disclosed is a method which can evaluate the connection state of the shoulder portion of a screw coupling used as a coupling in pipes such as oil well pipes, where said evaluation occurs during or after connection in a simple and precise manner. The method for evaluating the connection state of a pipe thread coupling (100) is characterized by transmitting an ultrasound surface wave from the inner surface of either a pin (1) or a box (2), across the shoulder portion (13, 23) of the pin (1) or box (2), towards the inner surface of whichever of the pin (1) or box (2) which is not where the surface wave originates, and determining the quality of the connection state of the pipe thread coupling (100) based on the strength of the transmitted wave or the strength of the reflected wave.

Inventors:
HOSHINO Ikuji (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
星野 郁司 (〒41 大阪府大阪市中央区北浜4丁目5番33号 住友金属工業株式会社内 Osaka, 〒5410041, JP)
YAMANO Masaki (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
山野 正樹 (〒41 大阪府大阪市中央区北浜4丁目5番33号 住友金属工業株式会社内 Osaka, 〒5410041, JP)
SAKAMOTO Makoto (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
阪本 誠 (〒41 大阪府大阪市中央区北浜4丁目5番33号 住友金属工業株式会社内 Osaka, 〒5410041, JP)
Application Number:
JP2010/054624
Publication Date:
October 07, 2010
Filing Date:
March 18, 2010
Export Citation:
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Assignee:
Sumitomo Metal Industries, Ltd. (5-33, Kitahama 4-chome Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
住友金属工業株式会社 (〒41 大阪府大阪市中央区北浜4丁目5番33号 Osaka, 〒5410041, JP)
HOSHINO Ikuji (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
星野 郁司 (〒41 大阪府大阪市中央区北浜4丁目5番33号 住友金属工業株式会社内 Osaka, 〒5410041, JP)
YAMANO Masaki (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
山野 正樹 (〒41 大阪府大阪市中央区北浜4丁目5番33号 住友金属工業株式会社内 Osaka, 〒5410041, JP)
SAKAMOTO Makoto (5-33, Kitahama 4-chome, Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
International Classes:
G01N29/00; F16L15/04; G01N29/04
Foreign References:
JP2008089568A2008-04-17
JPH03183944A1991-08-09
JPS5720660A1982-02-03
JPS4984294A1974-08-13
JPH03272456A1991-12-04
JPH04265855A1992-09-22
JP2003227816A2003-08-15
Other References:
See also references of EP 2416149A4
None
Attorney, Agent or Firm:
OHNAKA Minoru (Daiichijuken Nagahoribashi-ekimae bldg. 4F, 3-6 Minamisemba 2-chome, Chuo-ku, Osaka-sh, Osaka 81, 〒5420081, JP)
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