E21B 21/08

Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure

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Edits on 16 Mar, 2022

"update inverses"

Golden AI

edited on 16 Mar, 2022

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E21B 21/085

Edits on 5 Mar, 2022

"update inverses"

Golden AI

edited on 5 Mar, 2022

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E21B 21/082

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Golden AI

created this topic on 5 Mar, 2022

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Description (+135 characters)

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E21B 21/08

Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure

Infobox

Is a

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Patent classification

Classification Type

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Cooperative Patent Classification

Parent classification

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E21B 21/00

Website

http://data.epo.org/linked-data/def/cpc/E21B21-08

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