Title:
プログラム可能圧力掘削及びプログラム可能勾配掘削並びに仕上げのための方法及び装置
Document Type and Number:
Japanese Patent JP5325233
Kind Code:
B2
Abstract:
A method for creating a programmable pressure zone adjacent a drill bit bottom hole assembly by sealing near a drilling assembly, adjusting the pressure to approximately or slightly below the pore pressure of the well bore face to permit flow out of the formation, and, while drilling, adjusting by pumping out of, or choking fluid flow into, the drilling assembly between the programmable pressure zone and the well bore annulus to avoid overpressuring the programmable pressure zone unless required to control the well.
Inventors:
Downton Jeff
Can worker
Can worker
Application Number:
JP2010541509A
Publication Date:
October 23, 2013
Filing Date:
December 29, 2008
Export Citation:
Assignee:
Schlnmberger Holdings Limited
International Classes:
E21B21/08; E21B33/12
Domestic Patent References:
| JP3161610A | ||||
| JP2004308197A |
Foreign References:
| WO2005001237A1 |
Attorney, Agent or Firm:
Koichi Tsujii
Sadao Kumakura
Disciple Maru Ken
Ino Sato
Mitsuru Matsushita
Ichiro Kurasawa
Makoto Watanabe
Sadao Kumakura
Disciple Maru Ken
Ino Sato
Mitsuru Matsushita
Ichiro Kurasawa
Makoto Watanabe
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