E03B 3/22

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Class  E03B : INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER


Subclass 3/22: Methods or installations for obtaining or collecting drinking water or tap water (treatment of water C02F) from underground Obtaining and confining water by means of wells (applicable to a combination of water and other liquids or to other liquids only E21B 43/00) Component parts of wells Well filters (filters in general B01D 24/00-B01D 35/00) of elements of special shape Selection of specified materials

Recent Patents

Patent #TitleFiling DateIssue DatePatent Owner
8763689 Ceramic screenJun 28, 07Jul 01, 14MAERSK OLIE OG GAS A/S
8251145 Pressure relieving transition jointFeb 06, 12Aug 28, 12HALLIBURTON ENERGY SERVICES, INC.
8171995 Pressure relieving transition jointMar 29, 11May 08, 12HALLIBURTON ENERGY SERVICES, INC.
7984762 Pressure relieving transition jointSep 25, 08Jul 26, 11HALLIBURTON ENERGY SERVICES, INC.
6305468 Downhole screen and method of manufactureMay 28, 99Oct 23, 01BAKER HUGHES INCORPORATED
6006829 Filter for subterranean useJun 06, 97Dec 28, 99WEATHERFORD TECHNOLOGY HOLDINGS, LLC

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