Tool joints of our company are made of modified alloy steel, then fully heattreated. So the mechanical properties in accordance with API standard, such ashardness, strength and impact strength are accorded with standard. Allconnections are accorded with API Spec. and phosphatized or copper plated inorder to improve capacity of resistance to corrosion and anti-gallinged, drinid.Located at the bottom of the drill string,drill collar is a major component ofbottom hole assembly. The maincharacteristic of this trenchless tool is thickwall (It is generally between38 mm to 53 mm and is equivalent to 4 to 6 timesof that of drill pipe), largergravity and stiffness.
Superior-qualitygreenpipe&Advanced heat treatment process-HighStrength&hightoughness(especiallyunder low temperature)
•Tomeet or exceed requirements of the API 7-1,API 7g&IS09001
•Equippedwith advanced inspection instruments and a strictly enforced qualitycontrollingsystem,the final products are guaranteed to be of superiorandstablequality.
Due to our qrofessional technicians&productflexibility,we are capable of meetingsome customer' s specific requirements.