Your current location:Oil and Gas Material and Equipment > Drilling Equipment > Drilling Tool > Drill Collar > Drill Collar
OD:3 1/8-10in; Bore:1 1/4-3in; Connection style and size:NC23 NC26 NC31 NC35 NC38 NC40 NC44 NC46 NC50 NC56 NC61 NC70...
BackSHANXI NORTH FENGLEI GROUP CO. LTD.
Registered Address:China 山西 临汾
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