The drill pipe weighted smooth

The drill pipe weighted smooth

Given UBT meet the requirements of API specification 7 but have wider range of sizes.
On customer's request can be manufactured drill collars other sizes.
Threaded connections — clutch, the nipple is performed with the discharge grooves, troughs of the threads are hardened by cold plastic deformation. Thread phosphating.

Description

Specifications

Thread type The outer diameter Inner diameter Length
mm
Diameter
chamfer
The proportion of strength in bending
mm inch mm inch
NC23-31 ∅79.4 ∅3 1/8 ∅31.8 ∅1 1/2 9150 ∅76.2 2.57 :1
NC26-35(2 3/8 IF) ∅88.9 ∅3 1/2 ∅38.1 ∅1 1/2 9150 ∅82.9 2.42 :1
NC31-41(2 7-8 "IF") ∅104.8 ∅4 1/8 ∅50.8 ∅2 9150 ∅100.4 2.43 :1
NC35-47 ∅120.6 ∅4 3/4 ∅50.8 ∅2 9150 ∅114.7 2.58 :1
NC38-50(3 1/2 IF) ∅127.0 ∅5 ∅57.2 ∅2 1/4 9150 ∅121.0 2.38 :1
NC44-60 ∅152.4 ∅6 ∅57.2 ∅2 1/4 9150&9450 ∅144.5 2.49 :1
NC44-60 ∅152.4 ∅6 ∅71.4 ∅2 13/16 9150&9450 ∅144.5 2.84 :1
NC44-62 ∅158.8 ∅6 1/4 ∅57.2 ∅2 1/4 9150&9450 ∅149.2 2.91 :1
NC46-62(4IF) ∅158.8 ∅6 1/4 ∅71.4 ∅2 13/16 9150&9450 ∅150.0 2.63 :1
NC46-65(4IF) ∅165.1 ∅6 1/2 ∅57.2 ∅2 1/4 9150&9450 ∅154.8 2.76 :1
NC46-65(4IF) ∅165.1 ∅6 1/2 ∅71.4 ∅2 13/16 9150&9450 ∅154.8 3.05 :1
NC46-67(4IF) ∅171.4 ∅6 3/4 ∅57.2 ∅2 1/4 9150&9450 ∅159.5 3.18 :1
NC50-67(4 1/2 IF) ∅171.4 ∅6 3/4 ∅71.4 ∅2 13/16 9150&9450 ∅159.5 2.37 :1
NC50-70(4 1/2 IF) ∅177.8 ∅7 ∅57.2 ∅2 1/4 9150&9450 ∅164.7 2.54 :1
NC50-70(4 1/2 IF) ∅177.8 ∅7 ∅71.4 ∅2 13/16 9150&9450 ∅164.7 2.73 :1
NC50-72(4 1/2 IF) ∅184.2 ∅7 1/4 ∅71.4 ∅2 13/16 9150&9450 ∅169.5 3.12 :1
NC56-77 ∅196.8 ∅7 3/4 ∅71.4 ∅2 13/16 9150&9450 ∅185.3 2.70 :1
NC56-80 ∅203.2 ∅8 ∅71.4 ∅2 13/16 9150&9450 ∅190.1 3.02 :1
6 5/8 REG ∅209.6 ∅8 1/4 ∅71.4 ∅2 13/16 9150&9450 ∅195.7 2.93 :1
NC61-90 ∅228.6 ∅9 ∅71.4 ∅2 13/16 9150&9450 ∅212.6 3.17 :1
7 5/8 REG ∅241.3 ∅9 1/2 ∅76.2 ∅3 9150&9450 ∅223.8 2.81 :1
NC70-97 ∅247.6 ∅9 3/4 ∅76.2 ∅3 9150&9450 ∅232.8 2.57 :1
NC70-100 ∅254 ∅10 ∅76.2 ∅3 9150&9450 ∅237.3 2.81 :1
8 5/8 REG ∅279.4 ∅11 ∅76.2 ∅3 9150&9450 ∅266.7 2.84 :1