Impedance matched joined drill pipe for improved acoustic transm

Details Impedance matched joined drill pipe for improved acoustic transm Impedance matched joined drill pipe for improved acoustic transm

1998-01-12

2000-08-22

Zimmerman, Brian

Communications, electrical: acoustic wave systems and devices

Wellbore telemetering

Through drill string or casing

367 83, 439192, 439194, 3408544, 175 56, F16L 914

Patent

active

061082686

ABSTRACT:
An impedance matched jointed drill pipe for improved acoustic transmission. A passive means and method that maximizes the amplitude and minimize the temporal dispersion of acoustic signals that are sent through a drill string, for use in a measurement while drilling telemetry system. The improvement in signal transmission is accomplished by replacing the standard joints in a drill string with joints constructed of a material that is impedance matched acoustically to the end of the drill pipe to which it is connected. Provides improvement in the measurement while drilling technique which can be utilized for well logging, directional drilling, and drilling dynamics, as well as gamma-ray spectroscopy while drilling post shot boreholes, such as utilized in drilling post shot boreholes.

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