钻铤： 钻铤是用来给钻头提供钻压，使钻杆处于受拉状态，并以其较大的刚度扶正钻头保持井眼轨迹的重要工具。
Drill Collar
Drill Collar is mainly used to provide drilling pressure to drill bit so that drill pipe is in tension.
Especially drill collar can keep drill bit centralized and hole track by large rigidity.
Specifications and parameters of Drill Collar:
|
钻铤编号 collar Series number |
外径O.D. |
内径I.D. |
长度 lengthmm |
台肩倒角直径 Circular bead chamfer diameter |
参考的弯曲强度比 Referenced bend strength ratio |
||
|
mm |
in |
mm |
in |
||||
|
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 |