BOREHOLE ARRAY FOR RANGING AND CROSSWELL TELEMETRY

A borehole array for ranging and crosswell telemetry is disclosed along with certain methods for employing such a borehole array. Some embodiments of the borehole array include electrically coupled reference nodes distributed along the length of a reference well. Each reference node includes a solen...

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Bibliographic Details
Main Authors HAY, RICHARD T, UPSHALL, MAC
Format Patent
LanguageEnglish
French
Published 06.01.2011
Subjects
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
PHYSICS
TESTING
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Summary:A borehole array for ranging and crosswell telemetry is disclosed along with certain methods for employing such a borehole array. Some embodiments of the borehole array include electrically coupled reference nodes distributed along the length of a reference well. Each reference node includes a solenoid operated by a control unit. The control unit employs the solenoid to generate a magnetic field for guiding a bottomhole assembly in a nearby well. The control unit further serves as a communications intermediary between the bottomhole assembly and a surface facility. The bottomhole assembly can be guided in turn by subse-quent reference nodes of the array and employ the closest reference node as a communications link to the surface. Moreover, the use of multiple reference nodes offers greater precision in determining the bottomhole assembly's position relative to the reference well. The borehole array can be used to guide multiple drilling operations concurrently.
Bibliography:Application Number: CA20092734079