The drill tool lifting sub is the special tools for lifting of the drill tools in petroleum,natural gas industry and geologic exploration.The drill tool lifting sub is divided into two structure.A type has 18 degree shoulder,another has 90 degree shoulder.The lifting sub can be selected according to elevator’s structure.The integral lifting subs are made of high strength alloy steel.All conections are complied with API standard.
Technical parameters and specifications
| Number |
Nomi size
 |
I.D.
(mm) |
External thread connection |
Lifting end |
| Thread type |
O.D.
 |
Bevelled
 |
Tong space
 |
O.D.
 |
Tong space
 |
| 1 |
73(2 7/8) |
31.8 |
NC23 |
79.4 |
76.2 |
250 |
111.1 |
100 |
| 2 |
38 |
NC26(2 3/8IF) |
88.9 |
82.9 |
| 3 |
89(3 1/2) |
50.8 |
NC31(2 7/8IF) |
104.8 |
100.4 |
127 |
| 4 |
50.8 |
NC35 |
120.7 |
114.7 |
| 5 |
57 |
NC38(3 1/2IF) |
127 |
121 |
| 6 |
127(5) |
71.4 |
NC44 |
152.4 |
144.5 |
168.3 |
| 7 |
158.8 |
149.2 |
| 8 |
71.4 |
NC46(4IF) |
158.8 |
150 |
| 9 |
165.1 |
154.8 |
| 10 |
171.5 |
159.5 |
| 11 |
127(5) |
71.4 |
NC50(4 1/2IF) |
177.8 |
164.7 |
| 12 |
184.2 |
169.5 |
| 13 |
NC56 |
196.8 |
185.3 |
300 |
| 14 |
203.2 |
190.1 |
| 15 |
76 |
6 5/8REG |
209.6 |
195.7 |
| 16 |
NC61 |
228.6 |
212.7 |
| 17 |
7 5/8REG |
241.3 |
223.8 |
| 18 |
NC70 |
247.7(9 3/4) |
232.6 |
| 19 |
254(10) |
237.3 |
| 20 |
NC77 |
279.4(11) |
260.7 | |
