Resources Contact Us Home
Spinner tool for boreholes

Image Number 3 for United States Patent #3982433.

A spinner tool comprises an elongate, cylindrical housing including a portion having elongate, axially extending, angularly disposed slots formed therethrough at circumferentially spaced points. An impeller is mounted within the housing and comprises circumferentially spaced, axially extending blades which are each J-shaped in cross-section so that the impeller is rotated in response to radially directed fluid flow entering the slots of the housing, but is not rotated in response to axial fluid flow. The impeller is mounted on a shaft which is supported by bearing structure that is substantially self-cleaning under the action of fluids flowing through the housing. A plurality of magnets are secured to the shaft for rotation under the action of the impeller, and a reed switch is positioned for actuation by the moving magnets to generate an output signal indicative of rotation of the impeller. Electronic circuitry is provided in the housing for amplifying and shaping the output signal from the reed switch. The spinner tool is utilized in a well logging system including apparatus for lowering the spinner tool into a borehole and a recorder for providing a plot of the rotation of the impeller as a function of the position of the spinner tool in the borehole.

  Recently Added Patents
Spoofing detection for civilian GNSS signals
Hand-held optical probe based imaging system with 3D tracking facilities
Hydrogen generation device and fuel cell system
Differentiated PSIP table update interval technology
Targeted gene deletions for polysaccharide slime formers
Disposable and tamper-resistant RFID lock
Method for the treatment, alleviation of symptoms of, relieving, improving and preventing a cognitive disease, disorder or condition
  Randomly Featured Patents
Method for controlling a cooling circuit for an internal-combustion engine
Semiconductor device fabrication method
Strung racquet
Method and device for gas cleaning or gas cooling
Method and system for performing a cash transaction with a self-service financial transaction terminal
High-breakdown voltage heterostructure field-effect transistor for high temperature operations
Developer transportation device for electrostatic copying machine
Elastic connector
Operating system independent agent
Organic light emitting diode display device and method of fabricating the same