Min. Order Reference FOB Price
1 Piece US$1,000.00-6,000.00 / Piece
Product Description
API Drill Collar Spiral Drill Collar and Non Magnetic Drill Collar Nmdc for Well Drilling Oilfield Product Description Spiral drill collar is made of alloy steel and the outside pipe has spiral grooves. it is an importand part of drill string, drill collar can supply the drill bit and increase the ...