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整体螺旋加重钻杆是在整体加重钻杆的中间加厚部位延长并铣削螺旋槽。
Integral spiral heavy weight drill pipe is to extend the central upset of heavy weight drill pipe and to cut spiral groove on heavy weight drill pipe.
技术规格及参数
Thechnical specifications and parameters
| 规格mm(in) |
管 体Dide Body |
接 头Tool Joint |
| 内径I.D.mm |
吊卡加厚elevater upset
mm |
吊卡/卡瓦外O.D.mm |
螺旋处外径Spiral O.D.
mm |
螺旋槽深Spiral depth
mm |
螺纹类型Thread |
外径O.D.
mm |
内径I.D.
mm |
| 88.9(3 1/2) |
54.0 |
92.1 |
88.9 |
101.6 |
9.5 |
NC38 |
120.6 |
54.0 |
| 114.3(4 1/2) |
69.8 |
117.5 |
114.3 |
127.0 |
12.7 |
NC46 |
158.8 |
69.8 |
| 127.0(5) |
76.2 |
130.2 |
127.0 |
139.7 |
12.7 |
NC50 |
165.1 |
76.2 |
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