The spectral decomposition of cuspforms

  title={The spectral decomposition of cuspforms},
  author={Roger Godement},
An annulus pressure operated oil well testing and sampling apparatus utilizes hydrostatic pressue to supplement spring means which biases against valve means to hold the valve means closed until application of sufficient hydraulic pressure to the annular fluid opens the tool to the formation and allows testing operations to be performed. A subsequent intentional or inadvertent release or sudden extreme increase of applied pressure on the annular fluid actuates means to close the valve means… CONTINUE READING