Boring or penetrating the earth – With signaling – indicating – testing or measuring – Indicating – testing or measuring a condition of the formation
Reexamination Certificate
2008-07-29
2008-07-29
Gay, Jennifer H. (Department: 3676)
Boring or penetrating the earth
With signaling, indicating, testing or measuring
Indicating, testing or measuring a condition of the formation
C175S039000, C175S040000, C702S009000
Reexamination Certificate
active
10960395
ABSTRACT:
Acoustic signals generated by drilling a bore hole with a drill bit are received at sensors placed in the drill string. The acoustic signals received by the sensors are processed, e.g. using a Fourier transform, and a characteristic of the acoustic signals is used to identify lithology, rock strength, presence of oil, presence of gas, change in lithology, or the like.
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UK Search Report, Application No. GB0519972.4, 3 pgs.
UK Examination Report, Application No. GB0519972.4, 3 pgs.
Schultz Roger L.
Weaver Gary
Baker & Botts L.L.P.
Gay Jennifer H.
Halliburton Energy Service,s Inc.
Harcourt Brad
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