Purchase Qty. Reference FOB Price
20-99 Pieces US$1,500.00
100+ Pieces US$1,400.00
Product Description
API 7-1 Drill Collars /Spiral Drill Collars for Well Drilling Drill Collar is the basic component in the BHA which provides weight on the bit for drilling and keeps the drillsting in tension. GM Drill Collar has been approved by the NS-1 certification, it is manufactured from 4145H modified ...