发明名称 |
METHOD FOR TRANSMITTING A HIGH COUNT RATE PULSE SIGNAL OVER A COMMON WELL LOGGING CABLE |
摘要 |
<p>METHOD FOR TRANSMITTING A HIGH COUNT RATE PULSE SIGNAL OVER A COMMON WELL LOGGING CABLE (D#74,052-FD!) A conventional type radiation detector in cooperation with a photomultiplier tube provides data pulses of one polarity, corresponding in peak amplitude and number to detected radiation in a borehole traversing an earth formation. Each data pulse is effectively converted to two pulses of different polarities, with one pulse starting when the other is completed and transmitted over a common well logging cable. The creation of a second pulse of an opposite polarity cancels out the low frequency component of the pulse so that they arrive at the surface as a pulse of a single polarity having a very short tail and a fast rise time. This permits more pulses to be transmitted within a given time period than heretofore existed. Surface electronics process the transmitted pulses to provide a record of the sensed condition in the borehole. I</p> |
申请公布号 |
CA1056515(A) |
申请公布日期 |
1979.06.12 |
申请号 |
CA19780299515 |
申请日期 |
1978.03.22 |
申请人 |
TEXACO DEVELOPMENT CORPORATION |
发明人 |
PITTS, ROBERT W. (JR.);WHATLEY, HOUSTON A. (JR.) |
分类号 |
G01V5/00;(IPC1-7):01V5/00 |
主分类号 |
G01V5/00 |
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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