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Method-and-apparatus-for-a-downhole-current-generator

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Method and apparatus for a downhole current generator

Details

Inventors: Skinner, Neal G.; Ringgenberg, Paul D.;
Assignee: Halliburton Energy Services, Inc. (Dallas, TX)
Primary Examiner: LaBalle; Clayton
Assistant Examiner:
Attorney, Agent or Firm: Herman; Paul I., Rippamonti; Russell N.

A downhole current generator generates power in a wellbore and includes a power section and an generator section. The power section has a sleeve slidably disposed within a housing which oscillates in response to the application of fluid pressure to the current generator. A piston is slidably attached to the sleeve and oscillates relative to the sleeve and the housing. The piston extends longitudinally into an generator section and has a plurality of magnets attached thereto which oscillate with the piston. Wire coil sections are fixed relative to the housing of the generator section and are positioned between the oscillating magnets such that a current is induced in the wire coil sections upon oscillation of the magnets.

DETAILED DESCRIPTION The present invention is directed to a downhole current generator for generating current in a wellbore.
The current generator includes a power section, which includes a first housing, a sleeve slidably disposed within the first housing such that the sleeve oscillates axially within the housing in response to changes in fluid pressure within the wellbore, and a piston slidably disposed within the sleeve to oscillate axially relative the sleeve and the housing.
The current generator further includes a generator section, wherein the alternator section includes a second housing attached to the power section and defining an interior volume into which the piston of the power section extends, at least two magnets attached to the piston such that the magnets oscillate in response to the oscillation of the piston, and a wire coil section fixed relative to the second housing of the alternator section and positioned to overlap the two magnets.

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