Vsesojuzny Nauchno-Issledovatelsky Institut Burovoi Technici

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Moscow, SU

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Packer for separation of zones in a well bore
- Patent number 4,499,947
- Issue date Feb 19, 1985
- Magyar Szenhidrogenipari Kutatofejleszto Intezet
- Istvan Zsoka
- E21 - EARTH DRILLING MINING

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