Title:
EXCAVATION FROM COASTAL PLATFORM
Document Type and Number:
Japanese Patent JPS57292
Kind Code:
A
Abstract:
A method of drilling wellbores 34 from an offshore platform 10 to penetrate a subterranean formation using a combination of surface drilling techniques and subsea drilling techniques to achieve an improved effectiveness by avoiding the necessity for large conduits communicating the ocean floor and the offshore platform, by terminating all of the borehole casings near the ocean floor rather than having them extend to the platform.
Inventors:
RIREI JIEN GOORUDOSUMISU
Application Number:
JP6681681A
Publication Date:
January 05, 1982
Filing Date:
May 01, 1981
Export Citation:
Assignee:
CONTINENTAL OIL CO
International Classes:
E21B7/128; E21B21/00; E21B43/017; (IPC1-7): E21B7/12
Domestic Patent References:
| JP40011041A |
Next Patent: JPH057293