CHEMICAL AGENT, OIL WELL PIPE, AND SCREW JOINT FOR OIL WELL PIPE

Title:

CHEMICAL AGENT, OIL WELL PIPE, AND SCREW JOINT FOR OIL WELL PIPE

Document Type and Number:

WIPO Patent Application WO/2022/255169

Kind Code:

A1

Abstract:

Regarding the lubrication properties when fastening and un-fastening an oil well pipe, the present invention achieves, by using a solid lubricate coating film, a baking resistance (galling resistance) equivalent to or better than that obtained from a conventional dope-compound method. This chemical agent is for forming a solid lubricate coating film on a fastening surface of a screw part, and contains, as a matrix component, a solid lubricant dispersed in a binder resin. The main component of the solid lubricant is melamine cyanurate. The mean particle diameter of the melamine cyanurate is 0.1-10.0 μm. An alkyd resin and a nitrocellulose are contained as the binder resin. The alkyd resin and the nitrocellulose are contained in an amount not less than 85 wt% of the weight of all binder resin components. The total weight of the solid lubricant is 10-100 parts by weight with respect to 100 parts by weight of the total weight of the binder resin.

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Inventors:

ISHIGURO YASUHIDE (JP)
GOTO SEIGO (JP)
KOGA TAKASHI (JP)
KAWAI TAKAMASA (JP)
OZAKI SEIJI (JP)
SATO HIDEO (JP)
FUJIMOTO SACHIKO (JP)
SHODA KOICHI (JP)
OKUBO AKIRA (JP)
KOBAYASHI RYOTA (JP)
KUBO RYOTA (JP)
TOYOSAWA KOTA (JP)

Application Number:

PCT/JP2022/021281

Publication Date:

December 08, 2022

Filing Date:

May 24, 2022

Export Citation:

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Assignee:

JFE STEEL CORP (JP)
TOYO DRILUBE CO LTD (JP)

International Classes:

C10M111/04; C10M105/24; C10M107/32; C10M107/36; C10M107/38; C10M107/44; F16L15/04; C10N30/06; C10N30/12; C10N40/00; C10N50/08

Domestic Patent References:

WO2014024755A1	2014-02-13
WO2020149310A1	2020-07-23
WO2015016322A1	2015-02-05

Foreign References:

JP2004053013A	2004-02-19
JP2021091464A	2021-06-17

Other References:

TSURU ET AL., JOURNAL OF JAPAN PETROLEUM INSTITUTE, vol. 61, no. 6, 1996, pages 527 - 536

Attorney, Agent or Firm:

TANAKA Hidetetsu et al. (JP)

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