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Drilling spool is designed to connect the BOP and wellhead, both side outlets of spool can be connected with valves or manifold to prevent blowout.
All drilling spools are designed and manufactured as per API Spec 16A, conforming to NACE MR 0175 standard for anti- H2S. End connection includes flanged and studded type.
Model | FS18-35 | FS18-70 | FS28-35 | FS28-70 | FS35-35 | FS35-70 |
Nominal Diameter (mm) | Φ185 | Φ185 | 280 | Φ280 | Φ346 | Φ346 |
Working Pressure (MPa) | 35 | 70 | 35 | 70 | 35 | 70 |
By-pass Diameter (mm) | Φ103 | Φ103/Φ78 | Φ103 | Φ103/Φ78 | Φ103 | Φ103 Φ78 |
Top and Bottom Connection Flange | API 6B 18-35 R46 | API 6BX 18-70 BX156 | API 6B 18-35 R46 | API 6BX 18-105 BX156 | API 6B 18-35 R46 | API 6BX 18-105 BX156 |
Applicable Temperature (℃) | -29~+121 | -29~+121 | -29~+121 | -29~+121 | -29~+121 | -29~+121 |
Weight (kg) | 600 | 620 | 800 | 850 | 1,100 | 1,280 |

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