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Machine translation
1. (WO1980002718) METHOD OF DRILLING PRODUCTIVE STRATUM
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/002718    International Application No.:    PCT/SU1980/000084
Publication Date: 11.12.1980 International Filing Date: 30.05.1980
IPC:
E21B 21/00 (2006.01), E21B 21/06 (2006.01), E21B 49/00 (2006.01), G01V 3/20 (2006.01)
Applicants:
Inventors:
Priority Data:
2764611 31.05.1979 SU
Title (EN) METHOD OF DRILLING PRODUCTIVE STRATUM
(FR) METHODE DE FORAGE D"UNE COUCHE PRODUCTIVE
Abstract: front page image
(EN)A method of drilling a productive stratum comprising its removal with the use of an initial drilling fluid, determining at the moment of removal of the stratum, the redox potential value of the stratum rock with subsequent replacement of the initial drilling fluid by a drilling fluid the value and the sign of the redox potential of which are the same as those of the redox potential of the productive stratum rock.
(FR)Une methode de forage d"une couche productive consiste a enlever son materiau de revetement en utilisant un fluide de forage initial, a determiner au moment ou l"on enleve le materiau de revetement de la couche la valeur du potentiel redox de la roche de la couche en remplacant ulterieurement le fluide initial de forage par un fluide de forage dont la valeur et le signe du potentiel redox sont les memes que ceux du potentiel redox de la roche de la couche productive.
Designated States:
Publication Language: Russian (RU)
Filing Language: Russian (RU)