Title:
DOWNHOLE APPARATUS AND METHOD
Document Type and Number:
WIPO Patent Application WO/2011/010101
Kind Code:
A3
Abstract:
There is described downhole apparatus (100) and methods for identifying the position of an interface (170) within a subterranean formation. In some examples, the apparatus is for use at a fixed downhole location, such as a production zone (195), and is configured to determine the encroachment of an interface (e.g. water) into the production zone. In other examples, the apparatus is for use with a drill assembly (290) and is configured to determine the distance of a drill assembly from a subterranean interface during drilling. In some examples, the apparatus uses signals comprising a plurality of frequencies, which may be selected based on the particular subterranean interfaces being measured.
Inventors:
WAYNE RUDD (GB)
Application Number:
PCT/GB2010/001392
Publication Date:
May 05, 2011
Filing Date:
July 22, 2010
Export Citation:
Assignee:
WAYNE RUDD (GB)
International Classes:
E21B7/04; E21B47/022; E21B47/04
Domestic Patent References:
| WO2009075777A2 | 2009-06-18 | |||
| WO2008055266A1 | 2008-05-08 |
Foreign References:
| GB2416398A | 2006-01-25 | |||
| US5175429A | 1992-12-29 |
Attorney, Agent or Firm:
DOCHERTY, Andrew (Aurora120 Bothwell Street, Glasgow G2 7JS, GB)
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