Abstract: Use of aerogels reduce the density of system fluids useful during drilling operations and system fluids comprising aerogels.

Abstract: The invention aims at obtaining a simplified and compact construction of a gravimetric metering device (1) for bulk products, comprising a large discharge section per activation zone (A) and transfer zone (F) for supplying the bulk product into a rotor (2) rotated in a horizontal plane, with transfer tools (3) extending mainly in the radial direction, an emptying station (E) offset relative to the transfer zone (F), and a weighing platform (W) arranged therebetween in the peripheral direction, provided with a force measuring device (20) for determining the weight of the bulk product transported. The invention is characterized in that the transfer tools (3) are mounted so as to be uncoupled from one another in at least one degree of freedom.

Abstract: A product supply apparatus for a weighing system (3) for supplying a weighed product quantity (4, 5) to a product receiving device (7) of a packaging machine (8) is formed to prevent spreading of the supplied product quantity when discharging from a collecting receptacle (11, 12) and falling through the product receiving device (7).

Abstract: An improved combined weighing apparatus is provided for weighing vegetables and fruits, confectionary articles, secondary products, perishables and other articles having high variations in single weight with high accuracy to produce packages having a predetermined weight. System for measurement of feeded products and for combination of weights which is equal or most approximate to the target value are improved in a way to eliminate the dead time of combining operation during weighing time for increasing the speed of combining operation while maintaining high accuracy.