Patent ID: 6496448
Filing Date: 2002-12-17
Classification: B06B,E21B

Abstract:
A method of recovering oil from the earth at positions below the surface of the earth, including the steps of:providing a transducer resonant at a frequency in one of the sonic and sub-sonic ranges and formed from (a) a transducer member having a looped configuration and having a gap at a position in the looped configuration and having properties of vibrating in accordance with the introduction of an electrical voltage to the transducer member and (b) a support member attached to the transducer and having a looped configuration enveloping the transducer member and having properties of vibrating with the transducer member, and applying an alternating voltage to the transducer with a fundamental frequency corresponding substantially to the resonant frequency of the transducer and with square wave characteristics to produce vibrations of the transducer and the recovery of oil as a result of the vibrations when the transducer is disposed in the earth.