Mechanical wave heating of bituminous sands

Details Mechanical wave heating of bituminous sands Mechanical wave heating of bituminous sands

E - Fixed Constructions

21

B

166/35

E21B 43/24 (2006.01)

Patent

CA 1057650

A B S T R A C T Underground bituminous sand deposits are heated by mechanical wave energy to fluidize the bituminous sand thereby to facilitate extraction thereof. For uniform, circular, symmetrical dispersion of mechanical wave energy of high- power and low-frequency, a mechanical wave energy radiator is provided comprising a cylindrical elastic tube of springy steel or the like preferably dimpled or corrugated and closed at one end and containing a liquid medium. Mechanical wave energy is applied to the liquid medium by a reciprocating source or the like connected to the radiator by a rigid walled tubular pipe or the like. The axial length of the radiator tube should be an odd multiple of one-quarter wavelength of the mechanical wave energy transmitted. Cavitation within the liquid is avoided by biasing the system with a steady state pressure at least as great as the maximum negative pressure swing of the mechanical waves in the liquid. Trans- formers are disclosed for accommodating changes in pipe dia- meter and changes in liquid medium throughout the system.

251243

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