Appeal No. 1997-0594
Application No. 08/448,134
drill stem having a bit positioned on its lower end and in
contact with said earth formation, said bit including a bit
body having a transverse face adjacent a zone of said earth
formation which is substantially uninvaded by drilling fluid
and including a sensor mounted thereon and adjacent to said
transverse face of said bit to emit electromagnetic wave
energy into said substantially uninvaded zone of said earth
formation ahead of said bit during the drilling thereof;
generating electromagnetic wave energy for emission from
said sensor into said uninvaded zone during said drilling;
receiving reflected electromagnetic wave energy from said
uninvaded zone at said sensor during said drilling;
measuring the alteration of at least one characteristic
of said electromagnetic wave energy emitted by said sensor and
received at said sensor and caused by said uninvaded zone; and
comparing said measurement of said electromagnetic wave
energy with said measurement of one of density and porosity
measurements to detect the presence of hydrocarbons in said
uninvaded zone.
The Examiner relies upon the following references:
Blondeau 2,310,611 Feb. 9, 1943
Piety 3,293,542 Dec. 20, 1966
Unterberger et al. 3,412,321 Nov. 19, 1968
(Unterberger)
Rau 4,893,084 Jan. 9, 1990
Bartel et al. (Bartel) 4,940,943 Jul. 10, 1990
The following rejections are appealed.1
1It is noted that the briefs and answer address an
obviousness type double patenting rejection. However,
3
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