Title:
METHOD AND DEVICE FOR INSTALLING RISER FOR PETROLEUM PRODUCTION
Document Type and Number:
Japanese Patent JPS56489
Kind Code:
A
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Inventors:
NAKA KOUKICHI
Application Number:
JP7561179A
Publication Date:
January 06, 1981
Filing Date:
June 18, 1979
Export Citation:
Assignee:
KOGYO GIJUTSUIN
International Classes:
E21B17/01; E21B7/132; E21B43/01; E21B43/013; (IPC1-7): E21B7/132
Domestic Patent References:
| JPS52126904U | 1977-09-27 | |||
| JPS3925945B1 | ||||
| JPS51151785U | 1976-12-03 |
Next Patent: ALARM DEVICE PROVIDED WITH DISPLAY