Oriented Bent SubsThe oriented bent sub is a major power deflection tool having a fixed angle (α) deviated from low end thread of the bent sub to axial line of d
Flat-bottom milling shoeFlat-bottom milling shoe ,at the milling surface, the carbide particles are built up by welding, which plays a part of self-milling. It is used to mi
Side Drill ToolsIfthecasinginoillayerisseriouslydamagedortheoillayerisburiedforsloughingsandandtheproductionofthewellcannotbecontinued,"windowing"orsidedri
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