Abstract: The invention relates to a system and to a method for measuring at least one flow property of at least one fluid in a porous medium. The measurement system (1) comprises at least one cell (2), means (7) for injecting fluid(s) into the cell and X-ray radiography means (4, 5).

Abstract: The invention relates to a system and to a method for measuring at least one flow property of at least one fluid in a porous medium. The measurement system (1) comprises at least one cell (2), means (7) for injecting fluid(s) into the cell and X-ray radiography means (4, 5).

Abstract: A high-temperature drilling fluid is disclosed based on brine and on a mixture of solids of controlled grain size, with water, dissolved salts and insoluble mineral solids comprising at least in part a weighting material of a grain size such that its D50 ranges between 1 and 25 ?m and in part colloids of a grain size such that its D50 ranges between 0.2 and 2 ?m. The total volume fraction of the solids ranges between 30 and 50% in relation to the total volume, and the total volume comprises at least 10% by volume of the colloids.

Abstract: A high-temperature drilling fluid is disclosed based on brine and on a mixture of solids of controlled grain size, with water, dissolved salts and insoluble mineral solids comprising at least in part a weighting material of a grain size such that its D50 ranges between 1 and 25 ?m and in part colloids of a grain size such that its D50 ranges between 0.2 and 2 ?m. The total volume fraction of the solids ranges between 30 and 50% in relation to the total volume, and the total volume comprises at least 10% by volume of the colloids.

Abstract: Method relating to the transportation of viscous products in a pipe by core annular flow, allowing to limit the restart pressures required for circulating the viscous product. Core annular flow is a technique allowing pipe transportation of a very viscous product with limited pressure drops. However, in case of density difference between the fluids, transverse displacements of the viscous product towards the wall lead to stratification and the restart pressures are then high, because the viscous part has to be deformed. In order to limit these pressures, we propose limiting transverse displacements by injecting into said pipe a yield stress fluid allowing to generate a transverse displacement resistance. Additives can be added to the water layer conventionally used to obtain such a yield stress fluid. Application: notably viscous hydrocarbons transportation.

Abstract: A system inserted between the base of a riser (5) and a production well flowline for collecting an effluent consisting of at least a gas phase and a liquid phase, includes a capacity (1) including an inlet port for the effluent and two outlet ports, one in the upper part of said capacity for the gas phase, the other in the lower part for the liquid phase communicating with the base of the riser, a gas supply line (2) connecting the gas outlet port to the riser at a predetermined height H, including a flow control valve (3), and an instrumentation set for locating the level of the liquid/gas interface in the capacity, a computer receiving the instrumentation data for determining the instructions for controlling said flow control valve so as to adjust the volume of gas fed at height H into the riser.

Abstract: A system inserted between the base of a riser (5) and a production well flowline for collecting an effluent consisting of at least a gas phase and a liquid phase, includes a capacity (1) including an inlet port for the effluent and two outlet ports, one in the upper part of said capacity for the gas phase, the other in the lower part for the liquid phase communicating with the base of the riser, a gas supply line (2) connecting the gas outlet port to the riser at a predetermined height H, including a flow control valve (3), and an instrumentation set for locating the level of the liquid/gas interface in the capacity, a computer receiving the instrumentation data for determining the instructions for controlling said flow control valve so as to adjust the volume of gas fed at height H into the riser.

Abstract: A method providing real-time determination of a thermal profile of the drilling fluid in a well from three measuring points available in the field, i.e. the injection temperature, the outlet temperature and the bottomhole temperature is disclosed. The form of the profile between these three points is defined by a type curve representative of the thermal profiles in a well under drilling, estimated from physical considerations on thermal transfers in the well.

Abstract: The present invention relates to a method of calculating the pressure drops created by a given fluid in a circuit having a determined thermal profile. The method includes making up a database (BD) giving the rheology of various fluids at least according to the temperature; segmenting a thermal profile (2, 3) into sections (4, 5, 6, 7) and determining a representative temperature value (T1, T2, T3, T4) for the fluid in each section; using the database for determining the rheology of the fluid in each section at the representative temperature; and calculating and adding up the pressure drops in each section considering the rheology determined.