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Title: Method and system for downhole clock synchronization

Abstract

A method and system for use in synchronizing at least two clocks in a downhole network are disclosed. The method comprises determining a total signal latency between a controlling processing element and at least one downhole processing element in a downhole network and sending a synchronizing time over the downhole network to the at least one downhole processing element adjusted for the signal latency. Electronic time stamps may be used to measure latency between processing elements. A system for electrically synchronizing at least two clocks connected to a downhole network comprises a controlling processing element connected to a synchronizing clock in communication over a downhole network with at least one downhole processing element comprising at least one downhole clock. Preferably, the downhole network is integrated into a downhole tool string.

Inventors:
; ; ; ;
Issue Date:
Research Org.:
IntelliServ, Inc., Provo, UT (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1176012
Patent Number(s):
7142129
Application Number:
10/710,875
Assignee:
IntelliServ, Inc. (Provo, UT)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
DOE Contract Number:  
FC26-01NT41229
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Hall, David R., Bartholomew, David B., Johnson, Monte, Moon, Justin, and Koehler, Roger O.. Method and system for downhole clock synchronization. United States: N. p., 2006. Web.
Hall, David R., Bartholomew, David B., Johnson, Monte, Moon, Justin, & Koehler, Roger O.. Method and system for downhole clock synchronization. United States.
Hall, David R., Bartholomew, David B., Johnson, Monte, Moon, Justin, and Koehler, Roger O.. Tue . "Method and system for downhole clock synchronization". United States. https://www.osti.gov/servlets/purl/1176012.
@article{osti_1176012,
title = {Method and system for downhole clock synchronization},
author = {Hall, David R. and Bartholomew, David B. and Johnson, Monte and Moon, Justin and Koehler, Roger O.},
abstractNote = {A method and system for use in synchronizing at least two clocks in a downhole network are disclosed. The method comprises determining a total signal latency between a controlling processing element and at least one downhole processing element in a downhole network and sending a synchronizing time over the downhole network to the at least one downhole processing element adjusted for the signal latency. Electronic time stamps may be used to measure latency between processing elements. A system for electrically synchronizing at least two clocks connected to a downhole network comprises a controlling processing element connected to a synchronizing clock in communication over a downhole network with at least one downhole processing element comprising at least one downhole clock. Preferably, the downhole network is integrated into a downhole tool string.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {11}
}

Patent:

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