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> Overburden Casing -
Double Casing
DTH hammer type drilling inside the case It can be widely used...
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Symmetric Casing Drilling Syst
Symmetric is a system comprised of an ingeniously simple conce...
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Symmetric And Overburden Downh
Symmetric is a system comprised of an ingeniously simple conce...
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Concentric Casing system(Symme
Symmetric is a system comprised of an ingeniously simple conce...
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Eccentric(ODEX) Casing System
Superdrill drill produces the ODEX Eccentric Overburden Drilli...
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Odex Eccentric
Superdrill drill produces the ODEX Eccentric Overburden Drilli...