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An Entity of Type : prov:Entity, within Data Space : webisa.webdatacommons.org associated with source dataset(s)

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  • bration resisting assembly for packing the space between a well wall and a pipe string inserted in the well, including a pipe, a deformable collar surrounding the pipe, an abutment ring secured to the pipe at one end of said collar, an expander wedge at the other end of the collar, an expansible clamp co-operating with said wedge for expansion upon relative downward movement of the wedge, a second
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