Results 281 to 290 of about 643,401 (321)
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Data transmission in a drill string
The Journal of the Acoustical Society of America, 1984Data is transmitted through a drill string by means of acoustical energy by transmitting an acoustical signal for a first predetermined interval and ceasing transmission of the signal for a second predetermined interval to represent a first binary state; ceasing transmission of the signal for a third predetermined interval to represent a second binary ...
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Method for determining drill string velocity
The Journal of the Acoustical Society of America, 1989The invention is a method of determining the acoustic velocity of a drill string (28) in a borehole (10). An acoustic signal is generated at a first location(34) along the drill string, and detected at a second location (7). The detected signal is autocorrelated and the time of occurrence of multipath reflections on the autocorrelation record is ...
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Integrative oncology: Addressing the global challenges of cancer prevention and treatment
Ca-A Cancer Journal for Clinicians, 2022Jun J Mao,, Msce +2 more
exaly
Hybrid fuzzy sliding mode for stick-slip suppression in drill string systems
Journal of Mechanical Science and Technology, 2022A. Krama +3 more
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Modeling and multi-objective optimization of a drill-string system in the tripping operation
Nonlinear dynamicsXun Peng +4 more
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Dynamic analysis of drill string in "pipe in pipe" structure while deep water drilling
Applied Ocean ResearchXing Zhou +5 more
semanticscholar +1 more source