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 |