All Days 1991
DOI: 10.2118/22102-ms
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Evaluation of Vacuum-Insulated Tubing for Paraffin Control at Norman Wells

Abstract: Paraffin deposition in the production tubing of wells in the Norman Wells field has been an ongoing operational problem. Although many solutions are possible a passive thermal solution is most desirable. Using a wellbore thermal simulator, it was predicted that vacuum insulated tubing could raise the flowing tubing temperature at the wellhead above the cloud point of the crude oil. A string of vacuum insulated tubing was installed and has performed as predicted by the thermal simulation model.

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Cited by 17 publications
(6 citation statements)
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“…Dry foam silicate 1 and silica aerogel 13 systems were reported to be ten times more effective than liquid brine. Purdy and others evaluated Vacuum Insulated Tubing (VIT) [14][15][16] and as expected its application was found successful, but expensive. Nonetheless, heat loss through couplings, valves, gauges, centralizers, damaged and scrapped coatings or couplings, can dramatically increase heat loss from a VIT System.…”
Section: Introductionmentioning
confidence: 83%
“…Dry foam silicate 1 and silica aerogel 13 systems were reported to be ten times more effective than liquid brine. Purdy and others evaluated Vacuum Insulated Tubing (VIT) [14][15][16] and as expected its application was found successful, but expensive. Nonetheless, heat loss through couplings, valves, gauges, centralizers, damaged and scrapped coatings or couplings, can dramatically increase heat loss from a VIT System.…”
Section: Introductionmentioning
confidence: 83%
“…As an alternative to chemical means, Purdy and Cheyne (1991) applied VIT to solve the problem of paraffin deposition in the production tubing in wells near the Arctic Circle. The waxing problem from this reservoir with a BHT of 82 F was historic.…”
Section: History Of Thermal Insulation In the Oil Fieldsmentioning
confidence: 99%
“…Over the past three decades, VIT has proven to be an effective thermal isolation management tool in increasingly challenging environments, including deepwater challenges, steam challenges, and onshore challenges (Purdy and Cheyne 1991;Azzola et al 2007;Bradford et al 2004;Ellis et al 2004;Ellis et al 2004;Ferreira et al 2012;Li et al 2010;Singh et al 2007;Pattillo et al 2004;Lively 2002;Feeney 1999;Karra et al 2014;Kutzak and Gunn 1989;Nowinka et al 2005;Gonzales and Bajwa 2010).…”
Section: Introductionmentioning
confidence: 99%