发明名称 |
APARATO DE MEDICION Y REGISTRO DE DATOS EN POZOS. |
摘要 |
<p>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.</p> |
申请公布号 |
ES440474(A1) |
申请公布日期 |
1977.02.16 |
申请号 |
ES19740004404 |
申请日期 |
1975.08.26 |
申请人 |
TEXACO DEVELOPMENT CORPORATION |
发明人 |
|
分类号 |
G01V5/04;E21B47/12;(IPC1-7):01V/ |
主分类号 |
G01V5/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|