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Early evaluation system

  • US 5,540,280 A
  • Filed: 08/15/1994
  • Issued: 07/30/1996
  • Est. Priority Date: 08/15/1994
  • Status: Expired due to Term
First Claim
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1. A method of servicing a well having an uncased borehole intersecting a subsurface zone or formation of interest, comprising:

  • (a) running an outer tubing string into said well, said outer tubing string including;

    a packer having an inflatable element;

    a communication passage communicating an interior of said outer tubing string with said borehole below said packer;

    an inflation passage communicating said inflatable element with said interior of said outer tubing string; and

    an inflation valve having an open position wherein said inflation passage is open, and having a closed position wherein said inflation passage is closed, said inflation valve being movable between its said open and closed positions by surface manipulation of said outer tubing string;

    (b) with said inflation valve in its said open position, inflating said inflatable element by increasing fluid pressure in said interior of said outer tubing string, and thereby setting said packer in said borehole above said subsurface zone or formation;

    (c) after step (b), closing said inflation valve by surface manipulation of said outer tubing string to maintain said packer set in said borehole;

    (d) after step (c), running an inner well tool into said outer tubing string; and

    (e) engaging said inner well tool with said outer tubing string and placing said inner well tool in fluid communication with said subsurface zone or formation through said communication passage.

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