Drill collar
Introduction:
As an important part of drill string, drill collar can supply the drill bit and increase the rigidity of drill string.
Product Details
Product Usage:
As an important part of drill string,drill collar can supply thedrill bit and increase the rigidity of drill string
A TYPE AND B TYPEDRILL COLLAR:
Type A (Cylindrical): Be Made of alloy steel and the cross sections of the insideand outside pipe are both round.
Type B (Spiral): Be lade of alloy steel and the outside pipe has spiral grooves.
C TYPE NON-MAGNETIC DRILL COLLAR PROPERTY:
Type C(Non-magnetic): Made ofstainless alloy steel with rather low magnetic permeabilityand the cross sections of the inside and outside pipe are both round
