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内防喷器是国际钻井承包商协会（IADC）指定钻井过程中必备的防喷工具，如正在起钻时发生井涌（溢流），则需要使用内防喷器，因为这时重要的是要把尽可能多的钻杆再下入井内，而这只有在钻柱中有一回压装置时才能做到。
图示内防喷器是我公司研制成功的替代进口产品，产品已在国内主要油田投入使用，经用户检测和使用证明：本产品的结构和性能已达到进口同类产品水平。
he inside blowout preventer is the necessary tool assigned by the international Association of Drilling Contractors (IADC)in drilling operationns. When the blowout is happened during drilling tools are coming out of hole,the inside blowout preventer is needed,because the drill pipes as much as possible shall be put into hole again.The inside blowout preventer in fig.1.is the new developed product which has been used to substitute import product and used in some big oilfields in China.After being tested and used by the consumers,it has fully proved that the features and construction for the product has caught up the international levels.
技术规格及参数
| 内防喷器 |
| 接头螺纹 |
外径(in) |
内径(in) |
长度(in) |
| 2 3/8IF |
3 3/8～3 3/4 |
1 1/2 |
26 |
| 2 7/8IF |
4 1/8～4 1/4 |
1 3/4 |
28～30 |
| 3 1/2IF |
4 3/4～5 1/4 |
2 |
30～31 |
| 4IF |
6 1/4～6 3/4 |
2 1/2 |
33～34 |
| 4 1/2IF |
6 3/8～7 |
2 13/16 |
33～34 |
| 5 1/2FH |
7～7 1/2 |
2 13/16 |
33～34 |
| 6 5/8REG |
8 |
2 13/16 |
34 |
| 7 5/8REG |
9 1/2 |
2 13/16 |
34 |
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