| |
螺旋钻铤是在普通钻铤外圆柱面上加工出三条螺旋槽，是用来减少与井壁的接触面积，能有效地防止压差卡钻。MS牌螺旋钻铤采用API Spec7-1规范及SY5144标准生产。
Spiral drill collar is used to reduce contact area with hole so as to avoid efficiently bit sticking from differential pressure. MS brand spiral drill collars are manufactured strictly according to API Spec.7 and Standard SY5144, all mechanical properties meet with above standards.
技术规格及参数
Sizes for drill collar spiral groove
| 外径O.D. |
切削深度Cutting depth |
导程Lead±25.4 |
| Mm |
in |
A(mm) |
B(mm) |
mm |
| 86 |
3 3/8 |
3.5±0.79 |
|
679 |
| 98.4 |
3 7/8 |
4.0±0.79 |
|
914 |
| 101.6～111.1 |
4～4 1/8 |
4.8±0.79 |
|
914 |
| 114.3～130.2 |
4 1/2～5 1/8 |
5.6±0.79 |
|
965 |
| 133.4～146.1 |
5 1/4～5 3/4 |
6.4±0.79 |
|
1067 |
| 149.2～161.9 |
5 7/8～6 3/8 |
7.1±1.59 |
|
1067 |
| 165.1～177.8 |
6 1/2～7 |
7.9±1.59 |
|
1168 |
| 181.0～200.0 |
7 1/8～7 7/8 |
8.7±1.59 |
5.6±0.79 |
1626 |
| 203.2～225.4 |
8～8 7/8 |
9.5±1.59 |
6.4±0.79 |
1727 |
| 228.6～250.8 |
9～9 7/8 |
10.3±2.37 |
7.1±1.59 |
1829 |
| 254.0～276.2 |
10～10 7/8 |
11.1±2.37 |
7.9±1.59 |
1930 |
| 279.4 |
11 |
11.9±2.37 |
8.7±1.59 |
2032 |
|
|
