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钻铤主要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。MS牌钻铤完全采用API Spec7-1规范及SY5144标准生产。
The drill collar is mainly used to provide bit weight to drill bit so that drill pipe is in tension. Especially drill collar can keep drill bit centralized and hole track by large rigidity. MS brand drill collar are manufactured strictly from API Spec.7 and SY5144 standard.
技术规格及参数
钻铤编号
Drill Collar Number |
外径
O.D. |
内径
I.D. |
长度Length
(mm)
|
台肩倒角直径
Bevel Diameter |
参考的弯曲强度比
Refbend g 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 |
| N50-67(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 | |
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