Methods of using a laser to perforate composite structures...

Details Methods of using a laser to perforate composite structures... Methods of using a laser to perforate composite structures...

2006-04-14

2009-02-10

Gay, Jennifer H (Department: 3676)

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

C166S302000, C175S015000, C219S121710

Reexamination Certificate

active

07487834

ABSTRACT:
Apparatus and methods of using lasers are provided for the perforation of oil and gas well casings and rock formations. A rock removal process called laser spallation is provided that utilizes a combination of laser-induced thermal stress and laser induced superheated steam explosions just below the surface of the laser/rock interaction to spall or fracture the rock into small fragments that can then be easily removed from the rock formation. The use of high power laser beams of kilowatt level is provided to rapidly cut the steel casings and perforate into the formation. Techniques of the invention increase permeability and reduce hole tapering while perforating a deep hole in reservoir rock formations.

REFERENCES:
patent: 4113036 (1978-09-01), Stout
patent: 4282940 (1981-08-01), Salisbury et al.
patent: 6649864 (2003-11-01), De Steur et al.
patent: 2004/0206505 (2004-10-01), Batarseh
patent: 2006/0102343 (2006-05-01), Skinner et al.

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