Abstract: An apparatus and a process for handling samples of fluids under pressure to maintain the fluid in a monophasic state.In said apparatus and process the pressure variations of said fluid sample are limited so as to maintain the same in the monophasic state, by varying the volume available for said fluid sample in accordance with any variations of the temperature of the same.

Abstract: A miniature volumetric pump for determining the thermodynamic characteristics of oil effluents comprising a hollow cylinder and a piston moving in a straight line relative to the cylinder. The pump is characterized in that the piston is stationary and secured to the pump frame and in that the cylinder can move in a straight line with respect to the frame and is adapted to receive the piston in sealing-tight manner in its bore, the pump comprising a screen device for moving the cylinder.

Abstract: A closed receptacle has a wall defining an internal space in which the sampling cell is fixed in a stable position, and an external wall into which opens, through an aperture, a connecting conduit connected to the internal space. The receptacle has a removable seal which seals the periphery of the aperture. The apparatus includes a removable means for testing the receptacle, which defines together with the external wall of the receptacle, a sealed zone surrounding the connecting conduit and which communicates with pressure measuring means. The removable testing means includes a key for loosening and tightening the removable seal to permit testing the receptacle for sample leakage without loss of the contents of the receptacle.

Abstract: Device for destroying foam, and especially the foam of drilling fluids, comprises a container provided with an inlet for gas under pressure, an inlet for foam, an outlet for separated liquids and an outlet for separated gas, and within which the gas under pressure is confined within a divergent conical first space having its smaller end at the inlet for pressurized gas, said conical space and the part of the internal surface of the container outside this member bounding a geometrically closed second space and in which the inlet for foam enters said container through that portion of the container wall which bounds said geometrically closed space.