Abstract: This assembly includes a measuring device (50) including a container (60) and an insert (62) arranged in the container (60). The measuring device (50) includes a means (68) for driving the container (60) in rotation around a central axis, the container (60) and the insert (62) defining an intermediate space (64) between them for measuring the drilling fluid. The assembly includes a control and measurement unit (58), capable of recording information representative of the force applied by the drilling fluid on the insert (62) during the rotation of the container (60). The assembly includes an intake pipe (84) for bringing drilling fluid to be measured into the intermediate space (94) and a pump (82), comprising an inlet connected to a sampling head (80) and an outlet connected to the intake pipe (84) to pump the drilling fluid towards the intermediate space (64).

Abstract: Method and apparatus for determining the relative content of a first rock species and of a second rock species in a rock sample extracted from a wellbore. The method comprises adding a reactant to the rock sample, measuring a first information (PT1) relative to a first amount of compound produced at a first instant (T1) and a second information (PT2) relative to a second amount of compound produced at a second instant (T2). The method also comprises calculating the relative content of the first species in the rock sample from the first information (PT1) and calculating the relative content of the second species in the rock sample from the second information PT2). The method comprises determining a corrected amount (Cv) of compound generated by the reaction of the second species with the reactant at the first instant (T1), and calculating the relative content of the first species in the rock sample and the relative content of the second species in the rock sample based on the corrected amount (Cv).

Abstract: Method and apparatus for determining the relative content of a first rock species and of a second rock species in a rock sample extracted from a wellbore. The method comprises adding a reactant to the rock sample, measuring a first information (PT1) relative to a first amount of compound produced at a first instant (T1) and a second information (PT2) relative to a second amount of compound produced at a second instant (T2). The method also comprises calculating the relative content of the first species in the rock sample from the first information (PT1) and calculating the relative content of the second species in the rock sample from the second information PT2). The method comprises determining a corrected amount (Cv) of compound generated by the reaction of the second species with the reactant at the first instant (T1), and calculating the relative content of the first species in the rock sample and the relative content of the second species in the rock sample based on the corrected amount (Cv).

Abstract: This assembly includes a measuring device (50) including a container (60) and an insert (62) arranged in the container (60). The measuring device (50) includes a means (68) for driving the container (60) in rotation around a central axis, the container (60) and the insert (62) defining an intermediate space (64) between them for measuring the drilling fluid. The assembly includes a control and measurement unit (58), capable of recording information representative of the force applied by the drilling fluid on the insert (62) during the rotation of the container (60). The assembly includes an intake pipe (84) for bringing drilling fluid to be measured into the intermediate space (94) and a pump (82), comprising an inlet connected to a sampling head (80) and an outlet connected to the intake pipe (84) to pump the drilling fluid towards the intermediate space (64).