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发明名称
Time ramped gain for borehole televiewer
摘要
Amplifier gain is time ramped to increase amplification of the signal with increasing mud transit time and attenuation. Amplitude, ramp slope, and ramp onset time are independently controllable from the surface.
申请公布号
US4855965(A)
申请公布日期
1989.08.08
申请号
US19860935422
申请日期
1986.11.26
申请人
SHELL OIL COMPANY
发明人
RAMBOW, FREDERICK H. K.
分类号
E21B47/00;G01V1/46;G01V1/48;H03G1/02;H03G3/20
主分类号
E21B47/00
代理机构
代理人
主权项
地址
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