Dynamic underbalance sub

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11988066
APP PUB NO 20230160279A1
SERIAL NO

17920441

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A dynamic underbalance sub for use in a wellbore may include a sub housing, a first chamber provided in an interior of the sub housing, an opening extending through the sub housing and configured such that the first chamber is in fluid communication with an exterior of the sub housing, a second chamber provided in the interior of the sub housing, and a pressure-isolating wall provided between the first chamber and the second chamber.

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Patent Owner(s)

  • DYNAENERGETICS EUROPE GMBH

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fricke, Bernd Hannover, DE 9 26
Loehken, Joern Olaf Troisdorf, DE 23 91
Nascimento, Paula Feitoza Troisdorf, DE 3 6
Purcelean, Stefan Troisdorf, DE 2 1

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