Title:
回転式ダウンホールコア堀り装置、及びこのような回転式コア堀り装置を備えた回転式コア堀りシステム
Document Type and Number:
Japanese Patent JP4755389
Kind Code:
B2
Abstract:
The invention relates to a downhole rotary coring device placeable in a drill string and comprising a head section, a motor, and a core barrel having an outer motor comprising a rotor connected to the outer barrel and a stator to the head section, whereby the rotor and the stator are movable with respect to each other in the longitudinal direction of the drill string.
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Inventors:
Loigen, Peter Nicholas
Zuitburg, Herman Maria
Zuitburg, Herman Maria
Application Number:
JP2002539656A
Publication Date:
August 24, 2011
Filing Date:
September 25, 2001
Export Citation:
Assignee:
Fugro Engineers Besloten Fennaught Shap
International Classes:
E21B25/02; E21B25/00; E21B25/18
Domestic Patent References:
| JPS5337101A | 1978-04-06 | |||
| JPH0344525A | 1991-02-26 | |||
| JPS63167890A | 1988-07-11 |
Attorney, Agent or Firm:
Kazuo Shamoto
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Osamu Hoshino
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Osamu Hoshino