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Wireline-powered inflatable-packer system for deep wells

  • US 5,404,946 A
  • Filed: 08/02/1993
  • Issued: 04/11/1995
  • Est. Priority Date: 08/02/1993
  • Status: Expired due to Fees
First Claim
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1. An inflatable borehole packer system comprising:

  • a wall conforming inflatable packer;

    means for pumping liquid at ambient pressure into and out of said inflatable packer for inflating and deflating said inflatable packer in its entirety; and

    an inflation/deflation valve chamber, disposed between said pumping means and said inflatable packer for controlling fluid flow into and out of said inflatable packer, said valve chamber including valve means for preventing fluid from flowing out of said inflatable packer when said pumping means is stopped, and a differential pressure sensitive valve release means for opening said valve means when said pumping means reduces pressure in the valve chamber to below said ambient pressure, allowing said pumping means to withdraw liquid from the inflated packer, thus deflating the packer.

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