Title:
METHOD OF MACHINING SEAL RING GROOVE OF OIL WELL PIPE SCREW JOINT
Document Type and Number:
Japanese Patent JPS63120983
Kind Code:
A
Inventors:
ITO KAZUHIKO
KAMIYAMA FUJIMASA
KAMIYAMA FUJIMASA
Application Number:
JP26431286A
Publication Date:
May 25, 1988
Filing Date:
November 06, 1986
Export Citation:
Assignee:
NIPPON STEEL CORP
International Classes:
F16L15/04; (IPC1-7): F16L15/04
Attorney, Agent or Firm:
Teruo Taniyama