E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 29/06 (2006.01) E21B 7/06 (2006.01) E21B 23/02 (2006.01) E21B 47/04 (2006.01) E21B 47/09 (2006.01) E21B 47/12 (2006.01) E21B 47/14 (2006.01)
Patent
CA 2233853
A method and apparatus for positioning and accurately orienting well service equipment within a well casing having an indexing coupling therein to permit the conduct of selected well service operations. A well logging sonde including an ultrasonic scanner system is run into the well casing and, in addition to conducting a conventional well survey, provides accurate measurement of the internal geometry of the indexing couplings and produces an acoustic image specifically identifying internal features such as landing profile and orienting slot orientation relative to earth frame references such as vertical, horizontal, and magnetic north. The present invention also provides for location and characterization of casing imperfections, such as internal and external corrosion, and variations in casing wall thickness, and also permits location of marker devices such as magnetic and radioactive markers. The ultrasonic logging sonde produces a well log specifically identifying the location and orientation of each indexing coupling, thus enabling subsequent well operations, such as the drilling of lateral branches, to be designed and controlled.
Schlumberger Canada Limited
Smart & Biggar
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