Boring or penetrating the earth – With signaling – indicating – testing or measuring – Indicating – testing or measuring a condition of the formation
Patent
1998-06-30
1999-06-08
Suchfield, George
Boring or penetrating the earth
With signaling, indicating, testing or measuring
Indicating, testing or measuring a condition of the formation
7315204, 175 65, 507129, 507910, E21B 2100, E21B 4900, C09K 706
Patent
active
059097795
ABSTRACT:
An alkaline-reserve-free, oil-based drilling fluid is disclosed as comprising an oleaginous liquid, and an amine surfactant having the structure R-NH.sub.2, wherein R represents a C.sub.12 -C.sub.22 alkyl group or alkenyl group. Such fluid is particularly useful in the drilling of subterranean wells in which CO.sub.2, H.sub.2 S or other acidic gases which adversely effect the rheologies and other properties of the drilling fluid are encountered. The alkaline-reserve-free oil-based drilling fluid permits the logging of acidic gases which otherwise could not be logged in the presence of lime or other alkaline.
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Oehler Harris A
Patel Arvind D.
Patel Jayanti S.
M-I L.L.C.
Suchfield George
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