Abstract: Apparatus for separating slugs of fluid of one phase flowing through a conduit which is conducting fluid of another phase comprising an elongated inlet manifold connected to an inlet conduit at one end and being of sufficient cross-sectional flow area to reform the fluid flow from the inlet conduit into substantially channel flow for the liquid entering the inlet manifold. A liquid discharge manifold is located below the inlet manifold and is connected to the inlet manifold by a plurality of downcomer conduits which are spaced apart one from the other along the length of the inlet manifold. A gas discharge conduit is connected to the downstream end of the inlet manifold and to a gas-liquid separator for demisting the gas discharged from the inlet manifold. Gas blow-by through the discharge manifold is prevented by a liquid trap formed by a liquid discharge conduit connected to the liquid discharge manifold.

Abstract: Downhole well testing apparatus employing a mandrel which carries a testing means, the testing means being connected to an opening in the mandrel, and packing means for isolating the opening in the mandrel so that at least a portion of the formation to be tested is connected only to said testing means.