Title:
SUB-STRUCTURE OF DRILLING RIG
Document Type and Number:
Japanese Patent JPS6114387
Kind Code:
A
Inventors:
MASUDA KAZUO
Application Number:
JP13189284A
Publication Date:
January 22, 1986
Filing Date:
June 28, 1984
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
E21B19/15; B63B35/00; B63B35/44; E21B15/02; (IPC1-7): B63B35/44; E21B15/02; E21B19/15
Domestic Patent References:
| JPS5235922A | 1977-03-18 | |||
| JP54055603B |
Attorney, Agent or Firm:
Masafumi Tsukamoto
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