Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Stefan Purcelean0
Joern Olaf Loehken0
Bernd Fricke0
Paula Feitoza Nascimento0
Date of Patent
May 21, 2024
0Patent Application Number
179204410
Date Filed
June 16, 2021
0Patent Citations
...
Patent Primary Examiner
Patent abstract
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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