Method and apparatus for locating indexing systems in a cased we

Details Method and apparatus for locating indexing systems in a cased we Method and apparatus for locating indexing systems in a cased we

1998-03-27

1999-12-07

Tsay, Frank

Boring or penetrating the earth

Processes

Boring curved or redirected bores

1662552, E21B 708, E21B 4702

Patent

active

059967110

ABSTRACT:
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.

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