group nameDrill Collar
Min Order1 piece
modelSpiral Drill Collar
update timeThu, 21 Jul 2011 14:48:19 GMT
Min Order1 piece
Spiral Drill Collar
Spiral Drill Collar is used to reduce contact area with hole so as to avoid efficiently bit sticking from differential pressure.TIANHE brand spiral drill collars are manufactured strictly according API Spec7-1 and Standard SY5144.
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