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Title: Resonant acoustic transducer system for a well drilling string

Abstract

For use in transmitting acoustic waves propagated along a well drilling string, a piezoelectric transducer is provided operating in the relatively low loss acoustic propagation range of the well drilling string. The efficiently coupled transmitting transducer incorporates a mass-spring-piezoelectric transmitter combination permitting resonant operation in the desired low frequency range.

Inventors:
 [1];  [2]
  1. (Westford, MA)
  2. (Concord, MA)
Publication Date:
Research Org.:
Sperry Research Center, Sudbury, MA (USA)
OSTI Identifier:
864057
Patent Number(s):
US 4302826
Assignee:
Sperry Corporation (New York, NY) OSTI
DOE Contract Number:
EY-76-C-02-2817
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
resonant; acoustic; transducer; drilling; string; transmitting; waves; propagated; piezoelectric; provided; operating; relatively; loss; propagation; range; efficiently; coupled; incorporates; mass-spring-piezoelectric; transmitter; combination; permitting; operation; desired; frequency; acoustic transducer; acoustic wave; frequency range; piezoelectric transducer; acoustic waves; drilling string; resonant operation; transducer incorporates; transmitting transducer; transmitting acoustic; acoustic propagation; resonant acoustic; efficiently coupled; propagation range; provided operating; waves propagated; loss acoustic; /367/175/

Citation Formats

Kent, William H., and Mitchell, Peter G.. Resonant acoustic transducer system for a well drilling string. United States: N. p., 1981. Web.
Kent, William H., & Mitchell, Peter G.. Resonant acoustic transducer system for a well drilling string. United States.
Kent, William H., and Mitchell, Peter G.. Thu . "Resonant acoustic transducer system for a well drilling string". United States. doi:. https://www.osti.gov/servlets/purl/864057.
@article{osti_864057,
title = {Resonant acoustic transducer system for a well drilling string},
author = {Kent, William H. and Mitchell, Peter G.},
abstractNote = {For use in transmitting acoustic waves propagated along a well drilling string, a piezoelectric transducer is provided operating in the relatively low loss acoustic propagation range of the well drilling string. The efficiently coupled transmitting transducer incorporates a mass-spring-piezoelectric transmitter combination permitting resonant operation in the desired low frequency range.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1981},
month = {Thu Jan 01 00:00:00 EST 1981}
}

Patent:

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  • The acoustic data communication system includes an acoustic transmitter and receiver wherein low frequency acoustic waves, propagating in relatively loss free manner in well drilling string piping, are efficiently coupled to the drill string and propagate at levels competitive with the levels of noise generated by drilling machinery also present in the drill string. The transmitting transducer incorporates a mass-spring piezoelectric transmitter and amplifier combination that permits self-oscillating resonant operation in the desired low frequency range.
  • For use in transmitting acoustic waves propated along a well drilling string, a piezoelectric transducer is provided operating in the relatively low loss acoustic propagation range of the well drilling string. The efficiently coupled transmitting transducer incorporates a mass-spring-piezoelectric transmitter combination permitting a resonant operation in the desired low frequency range.
  • For use in transmitting acoustic waves propagated along a well drilling string, a piezoelectric transducer is provided operating in the relatively low loss acoustic propagation range of the well drilling string. The efficiently coupled transmitting transducer incorporates a mass-spring-piezoelectric transmitter combination permitting a resonant operation in the desired low frequency range.
  • This patent describes a method of rotary drilling of a wellbore with a drill string, formed with sections of drill pipe, and having a drill bit at the lower end thereof, the method of disconnecting and breaking out at least one section of drill pipe from the drill string at a select drill string joint with minimized drilling fluid spillage, it consists of the steps of (a) pulling the drill string out of the wellbore, (b) continuously rotating the drill string with a top drive drilling motor and circulating drilling fluid through the drill string while the drill string ismore » being pulled from the wellbore, (c) stopping the drill string rotation and the drilling fluid circulation when a select drill string joint is above the drilling rig floor, (d) injecting compressed gas into the drill string to displace the drilling fluid in that portion of the drill string above the select drill string joint, (e) stopping the injection of compressed gas into the drill string when the drilling fluid level has fallen below the select drill string joint, and (f) breaking out that portion of the drill string above the selected drill string joint.« less
  • Logging apparatus for measuring magnetic fields while drilling is disclosed. An electrode is located within a drill string and receives alternating current which is conducted to the drill string and from the drill string is injected into the earth surrounding the well. This current is concentrated in anomalies of interest, such as the casing of a target well which is to be intercepted by, or to be avoided by, the well being drilled. A sensitive magnetometer is located within a nonmagnetic portion of the drill string, near the bottom thereof, to detect the alternating magnetic field generated by the currentmore » flow in the target and to produce output signals corresponding to the detected field. The output from the magnetometer is used to determine the relative locations of the well being drilled and the target.« less