发明名称 |
Methods and apparatus for ultrasound velocity measurements in drilling fluids |
摘要 |
<p>The disclosure relates to methods and apparatus for determining the velocity of an ultrasound pulse in drilling fluids in downhole environments. A method for determining a velocity of ultrasound propagation in a drilling fluid in a downhole environment includes emitting an ultrasound pulse into the drilling fluid in a borehole using a first ultrasound transducer (37); detecting the ultrasound pulse after the ultrasound pulse has traveled a distance (d); determining a travel time (t) required for the ultrasound pulse to travel the distance (d); and determining the velocity of ultrasound propagation from the known distance (d) and the travel time (t). An apparatus for determining a velocity of ultrasound propagation in a drilling fluid in a downhole environment includes a first ultrasound transducer (37) disposed on a tool; and a circuitry (82) for controlling a timing of an ultrasound pulse transmitted by the first ultrasound transducer (37) and for measuring a time lapse between ultrasound transmission and detection after the ultrasound pulse has traveled a distance (d). <IMAGE></p> |
申请公布号 |
EP1441105(A1) |
申请公布日期 |
2004.07.28 |
申请号 |
EP20020293279 |
申请日期 |
2002.12.31 |
申请人 |
SERVICES PETROLIERS SCHLUMBERGER |
发明人 |
GRIFFITHS, ROGER;PABON, MIGUEL |
分类号 |
G01V1/44;E21B47/08;E21B47/18;G01V1/40;(IPC1-7):E21B47/08 |
主分类号 |
G01V1/44 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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