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| 鉆具旁通閥 |
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鉆井中發(fā)生溢流，并且鉆頭水眼被堵塞無(wú)法進(jìn)行壓井時(shí)，可以打開(kāi)旁通閥進(jìn)行循環(huán)或壓井。在鉆油氣層之前，須將旁通閥接到鉆頭上或鉆頭附近。
技術(shù)參數(shù)及規(guī)格
| 規(guī)格型號(hào) |
外徑 (mm) |
耐回壓 |
螺紋 |
連接鉆鋌規(guī)格 (in) |
| ZFF127 |
Φ127 |
35 Mpa, 70 Mpa |
NC38 |
5" |
| ZFF159 |
Φ159 |
35 Mpa, 70 Mpa |
NC46 |
6 1/4" |
| ZFF165 |
Φ165 |
35 Mpa, 70 Mpa |
NC50 |
6 1/2" |
| ZFF178 |
Φ178 |
35 Mpa, 70 Mpa |
NC50 |
7" |
| ZFF203 |
Φ203 |
35 Mpa, 70 Mpa |
6 5/8REG |
8" |
| ZFF228.6 |
Φ228.6 |
35 Mpa, 70 Mpa |
7 5/8REG |
9" |
| ZFF241 |
Φ241 |
35 Mpa, 70 Mpa |
7 5/8REG |
9 1/2" | |
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