China API Drill Collar 6 1/2″-Nc46 with ce certificate top quality Good price

Solution Description

Solution Info
Drill Collar is primarily utilised for providing drill bit with essential drilling stress, making certain pull pressure transmitted to drill pipe and centralize the drill bit. According to API Spec 7-1 technical specs, the content high quality is 4145H which is right after heat-treatment, thread hardening therapy and phosphating to far better antiseize. It also can be developed on CZPT ers’ requirements.

The parameter of drill collar according to API Spec 7-1 technical specs.

Drill Collar Thread Outdoors Diameter D Inside of Diameter d Size Chamfer Diameter Reference CZPT ding CZPT Ratio
L Df
mm in mm in mm mm
NC31-forty one(27/8IF) 104.eight 4 1/eight 50.8 two 9140or9450 a hundred.four two.forty three:one
NC35-47 4 3/four fifty.8 two 9140or9450 114.7 2.58:one
NC38-fifty(31/2IF) 127 five 57.two 2 1/4 9140or9450 121 2.38:1
NC44-sixty 152.4 six 57.2 two 1/four 9140or9450 144.5 2.49:one
NC44-sixty 152.4 6 seventy one.four 2 13/sixteen 9140or9450 one hundred forty four.5 two.eighty four:1
NC44-sixty two 158.8 6 1/four 57.2 2 1/four 9140or9450 149.2 two.91:one
NC46-62(4IF) 158.8 six 1/four seventy one.4 2 thirteen/16 9140or9450 150 two.sixty three:1
NC46-sixty five(4IF) 6 2/four fifty seven.two 2 1/four 9140or9450 154.eight 2.76:1
NC46-65(4IF) six 2/four 71.four 2 thirteen/sixteen 9140or9450 154.eight 3.05:one
NC46-67(4IF) 171.4 6 3/4 57.two two 1/4 9140or9450 159.five 3.eighteen:1
NC50-sixty seven(forty one/2IF) 171.4 six 3/four seventy one.4 two 13/16 9140or9450 159.5 two.37:one
NC50-70(forty one/2IF) 177.eight 7 57.two two 1/4 9140or9450 two.fifty four:one
NC50-70(forty one/2IF) 177.8 7 seventy one.four 2 thirteen/sixteen 9140or9450 164.7 2.seventy three:one
NC50-seventy two(forty one/2IF) 184.two seven 1/four 71.four two thirteen/16 9140or9450 169.5 three.12:one
NC56-seventy seven 196.eight 7 3/4 71.4 2 13/16 9140or9450 185.three two.70:one
NC56-eighty 203.two 8 71.4 2 thirteen/sixteen 9140or9450 one hundred ninety.1 3.02:one
6 5/8REG 209.6 eight 1/four 71.four two 13/sixteen 9140or9450 two.ninety three:one
NC61-90 228.six nine 71.4 2 thirteen/sixteen 9140or9450 212.7 3.17:one


one. Clean the shaft, the interior and outer holes of the bushing, and the inner hole of the hub. Remove any oil, paint or grime, area the bushing on the hub, and match the 50 percent holes to make total holes (every single entire hole will only be threaded on one aspect). Lightly oil the threads and points of established screws or the threads and heads of cap screws. Loosely spot the screws in the threaded holes on the hub facet. Make confident the bushing is free of charge on the hub. Snap the assembly onto the shaft and situation it in the preferred place. Tighten the screws alternately and evenly until finally all are restricted 5. Hammer the huge finish of the bushing with a hammer and block or socket to keep away from harm. The screw can now be turned somewhat to the specified torque location. Repeat this alternating hammering and screw retightening until the specified torque is attained. Fill all holes with grease to take away dust.