Drill collar

Date: 25 Dec 2009
Made of AISI4145H alloy steel, drill collar? mainly used between the dill pipe and drill head and connected by conversion connector? so that they can provide the pressure and weighting to dill head ,in order to? make the dill head to keep right trace .
  If order of inquiry please offer:
   ·outer diameter of dill collar
   ·handling features
   ·length of drill collar
   ·stress relief features
   ·drill collar bore
   ·connection type
Contact information:
Company:
Address:
Jiyuan Sanhe Zhengyuan Petroleum Machinery Co.,LTD
South of Sanhe Villiage, Sili Town, Jiyuan City, Henan, China[454650]
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