Title:
【発明の名称】地層中に坑井を設ける方法
Document Type and Number:
Japanese Patent JP3441072
Kind Code:
B2
Abstract:
A method of creating a wellbore in an underground formation is provided. A borehole is drilled in the underground formation, whereafter a casing of a ductile material is lowered into the borehole. The casing is selected to have a smaller elastic radial deformation than the surrounding formation when the casing is radially expanded against the borehole wall by application of a radial force to the casing. Said radial force is applied to the casing so as to radially expand the casing against the borehole wall thereby inducing a plastic radial deformation of the casing and an elastic radial deformation of the surrounding underground formation, whereafter the radial force is removed from the casing.
Inventors:
Donald Sea Wilcockson
Robetsk, Wilhelm Christianus Maria
Don Lee, Martain
Yoshinobu Sakurai
Robetsk, Wilhelm Christianus Maria
Don Lee, Martain
Yoshinobu Sakurai
Application Number:
JP50111694A
Publication Date:
August 25, 2003
Filing Date:
June 08, 1993
Export Citation:
Assignee:
Ciel International Research Mart Shats Pay BV
International Classes:
E21B7/20; E21B29/10; E21B33/14; E21B43/10; (IPC1-7): E21B43/10; E21B7/20
Domestic Patent References:
| JP6167528A |
Other References:
【文献】米国特許3477506(US,A)
Attorney, Agent or Firm:
Yoshio Kawaguchi (2 outside)