C
Chester Ledlie Sandberg
Researcher at Shell Oil Company
Publications - 30
Citations - 1576
Chester Ledlie Sandberg is an academic researcher from Shell Oil Company. The author has contributed to research in topics: Electrical conductor & Electrical resistance and conductance. The author has an hindex of 12, co-authored 29 publications receiving 1576 citations. Previous affiliations of Chester Ledlie Sandberg include Royal Dutch Shell.
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Patent
Thermal processes for subsurface formations
Harold J. Vinegar,Peter Veenstra,Steven Paul Giles,Chester Ledlie Sandberg,Frederick Henry Kreisler Rambow,Christopher Kelvin Harris,Lanny Gene Schoeling,Mark Gregory Picha,Etuan Zhang,Gary Lee Beer,Frederick Gordon Carl,Taixu Bai,Dong Sub Kim,Fairbanks Michael David,Sanz Guillermo Pastor +14 more
TL;DR: A process may include providing heat from one or more heaters to at least a portion of a subsurface formation as discussed by the authors, which is referred to as pyrolyzing.
Patent
Temperature limited heaters for heating subsurface formations or wellbores
Harold J. Vinegar,Chester Ledlie Sandberg,Christopher Kelvin Harris,Jaime Santos Son,James Louis Menotti,Frederick Gordon Carl +5 more
TL;DR: In this article, an alternating electrical current was applied to one or more electrical conductors, located in a subsurface or well-bore, to provide an electrically resistive heat output.
Patent
Conductor-in-conduit temperature limited heaters
Harold J. Vinegar,Chester Ledlie Sandberg,Christopher Kelvin Harris,Jaime Santos Son,Fredrick Gordon Carl +4 more
TL;DR: A heater may include an electrical conductor as discussed by the authors, and a centralizer may maintain a separation distance between the electrical conductor and the conduit, where the ferromagnetic material may at least partially surround a non-ferromagnetic materials.
Patent
Variable frequency temperature limited heaters
Chester Ledlie Sandberg,Harold J. Vinegar,Christopher Kelvin Harris,Jaime Santos Son,Fredrick Gordon Carl +4 more
TL;DR: A heater system may include an alternating current supply and an electrical conductor at a frequency between about 100 Hz and about 1000 Hz, where the electrical conductors may resistively heat upon application of the alternating electrical current as mentioned in this paper.
Patent
Start-up of temperature limited heaters using direct current (DC)
TL;DR: In this paper, a method for heating a subsurface formation is described, which includes applying direct electrical current (DC) to a heater section below a first selected temperature to provide an electrically resistive heat output.