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):
-
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
- DOE Contract Number:
- FC26-01NT41229
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2004 Aug 10
- 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 = {Tue Nov 28 00:00:00 EST 2006},
month = {Tue Nov 28 00:00:00 EST 2006}
}