Four Wings Drag Drilling Bits for Oil Well
Specifications
Standard: API Spec 7Type: Chevron and Step type
Wings: Four
Size: 2 7/8" to 24"
Thread: 2 3/8, 3 1/2, 4 1/2, 5 1/2, 6 5/8 API Reg. Pin
Drag bit are manufactured from forged high quality alloy steel and premium tungsten carbide insert, plus state of art welding technology and multiple precision heat-treatment to provide highest penetration rate and longest lifespan at roughest condition.
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