| 摘要 |
A method of measuring the viscosity of cement slurry used for a primary cementing of an oil or gas well 12 comprises: pumping the cement slurry along a conduit 16 to a cementing location 20; measuring a first pressure loss along a first, portion 28 of the conduit 16, which may be horizontal, and calculating a viscosity of the cement slurry based at least in part on the first pressure loss. The method may further comprise measuring a second pressure loss along a second portion 30 of the conduit 16, which may be vertical, and calculating the viscosity based on both the first and second pressure losses. The density may be calculated using the first and second pressure losses and the calculated viscosity may be compared with a reference value, with an action taken if the difference exceeds a threshold. The temperature of the cement may also be measured and the flow rates changed. A system for monitoring the properties of cement slurry is also claimed. |
