Power supply systems for subsurface heaters are described herein. The power supply system includes a variable voltage, load tap changing transformer. Systems and methods for supplying electrical power to subsurface heaters using the variable voltage transformers are also described herein.
申请公布号
WO2009052041(A1)
申请公布日期
2009.04.23
申请号
WO2008US79699
申请日期
2008.10.13
申请人
SHELL OIL COMPANY;SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.;BURNS, DAVID BOOTH;CARDINAL, PAUL GREGORY