Patent ID: 9638618
Date: 2017-05-02
CPC Classifications: G01N

Claim:
1. An online measuring assembly of rheological properties of a drilling fluid, comprising: a measuring device for measuring the rheological properties of the drilling fluid, including a hollow container with a central axis (A-A′) and an insert arranged in the container, at least one of the container and the insert being rotatably mounted around the central axis (A-A′), the measuring device including a means for rotating one of the container and the insert around the central axis (A-A′); the container and the insert defining an intermediate measuring space between them for measuring the drilling fluid; a control and measurement unit for activating the means for rotating one of the container and the insert in rotation at a chosen speed to record information representative of a force applied by the drilling fluid on the other of the container and the insert during the rotation of one of the container and the insert; wherein the assembly includes: an intake pipe for taking the drilling fluid to be measured in the intermediate measuring space and a discharge pipe distinct from the intake pipe for discharging the drilling fluid outside the intermediate measuring space; a pump having an inlet connected to a drilling fluid sampling head in a drilling fluid volume and an outlet connected to the intake pipe to pump the drilling fluid outside the sampling head towards the intermediate measuring space, wherein the control and measuring unit includes a means for steering the pump for activating the pump in a first measuring phase of the measuring device to continuously inject the drilling fluid at a given flow rate into the intermediate measuring space, and wherein the assembly is configured to immobilize the drilling fluid in the intermediate measuring space during a predetermined time, then trigger a second measuring phase similar to the first measuring phase.