Title:
METHOD OF LAYING SHALLOW SEA DERRICK
Document Type and Number:
Japanese Patent JP2541897
Kind Code:
B2
Abstract:
PURPOSE: To safely and simply set up a shallow sea derrick on the sear surface without use of a floating crane.
CONSTITUTION: Floaters are coupled to a shallow sea derrick having been built on the ground, to an arbitrary height, and then the derrick 1 is towed to a boring site in such a condition that the lower end of the derrick 1 is floated up from the sea bottom by means of the floaters 2. Thereafter, grounding legs 4 provided on the derrick 1 are grounded on the sea bottom, thereby it is possible to set up the derrick at a prescribed position.
Inventors:
KURAKI SHUNJI
Application Number:
JP32599092A
Publication Date:
October 09, 1996
Filing Date:
November 10, 1992
Export Citation:
Assignee:
NISHINIPPON CHISHITSU CHOSASHO KK
International Classes:
E02B17/00; E21B15/02; (IPC1-7): E02B17/00; E21B15/02
Domestic Patent References:
| JP62159543U | ||||
| JP59144040U | ||||
| JP5510130B2 | ||||
| JP4831528B1 |
Attorney, Agent or Firm:
Masamichi Ayada (1 person outside)