H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 3/56 (2006.01) E21B 36/04 (2006.01) H01B 7/04 (2006.01) H01B 7/08 (2006.01)
Patent
CA 2238505
A heater cable is strapped alongside tubing in a well to heat the production fluids flowing through the tubing. The heater cable has three copper conductors surrounded by a thin electrical insulation layer. An extrusion of lead forms a protective layer over the insulation layers. The lead sheaths have flat sides which abut each other to increase heat transfer. A metal armor is wrapped around the lead sheaths of the three conductors in metal-to-metal contact. Three phase power is supplied to the conductors, causing heat to be generated which transmits through the lead sheaths and armor to the tubing.
Conformément à la présente invention, on dispose un câble chauffant le long du tubage d'un puits afin de chauffer les fluides de production qui s'écoulent au sein du tubage. Ce câble chauffant comporte trois conducteurs en cuivre recouverts chacun d'une fine couche électriquement isolante. Une couche protectrice de plomb extrudé enveloppe ces couches isolantes. Ces gaines protectrices en plomb possèdent des côtés plats en aboutement les uns avec les autres, qui permettent d'accroître le transfert thermique. Une armure métallique est enroulée autour des gaines en plomb des trois conducteurs, en contact métal contre métal. Lesdits conducteurs sont alimentés en courant triphasé, ce qui provoque un dégagement de chaleur qui se transmet à travers les gaines en plomb et l'armure en direction du tubage.
Bailey Robert
Dalrymple Larry V.
Neuroth David H.
Baker Hughes Incorporated
Sim & Mcburney
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