Title:
HIGH TEMPERATURE DOWNHOLE GAUGE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2012/066323
Kind Code:
A3
Abstract:
A gauge system and method for monitoring well pressure at temperatures in excess of 300° C used in permanent monitoring of oil and gas wellbores. The gauge system includes an analogue output transducer and a long cable which is an extruded mineral insulated multi-core cable with a seam welded corrosion resistant metal outer sheath. The transducer is enclosed in a pressure tight corrosion resistant housing and the housing is pressure sealed to the metal outer sheath. The method includes applying signal conditioning and processing to the measurements to compensate for characteristics of the transducer, the cable and the environment and thereby provide continuous monitoring of the wellbore.
Inventors:
SHANKS DAVID SIRDA (GB)
Application Number:
PCT/GB2011/052230
Publication Date:
September 27, 2012
Filing Date:
November 16, 2011
Export Citation:
Assignee:
ZENITH OILFIELD TECHNOLOGY LTD (GB)
SHANKS DAVID SIRDA (GB)
SHANKS DAVID SIRDA (GB)
International Classes:
E21B47/06
Foreign References:
| US5033297A | 1991-07-23 | |||
| US4909855A | 1990-03-20 | |||
| US7017417B2 | 2006-03-28 | |||
| DE2521411A1 | 1976-11-25 | |||
| GB2467177A | 2010-07-28 | |||
| US5231880A | 1993-08-03 |
Other References:
See also references of EP 2640933A2
Attorney, Agent or Firm:
IPENTUS LIMITED (WilsontownBy Forth, Lanark South Lanarkshire ML11 8EP, GB)
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