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High power laser decomissioning of multistring and damaged wells

  • US 9,664,012 B2
  • Filed: 12/13/2013
  • Issued: 05/30/2017
  • Est. Priority Date: 08/20/2008
  • Status: Active Grant
First Claim
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1. A method of decommissioning a well, comprising:

  • positioning a high power laser cutting tool in a borehole to be decommissioned;

    delivering a high power laser beam from the high power laser tool in a predetermined pattern to the borehole, whereby the laser beam volumetrically removes material in the borehole; and

    , forming a plugging material channel, the plugging material channel essentially corresponding to the predetermined laser beam delivery pattern;

    wherein the laser beam delivery pattern comprises a plurality of volumetric removal patterns spaced along an axial direction of the borehole, at least two of the volumetric removal patterns configured in a staggered overlying relationship, whereby at least one volumetric removal patterns intersects a control line in the well.

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