Techniques for detecting a kick in a borehole include acquiring a set of measurements with a sonic tool in the borehole; determining borehole mud slowness from the set o f measurements; and comparing the mud slowness with a selected criterion, wherein the determining the mud slowness includes determining fluid mode slowness as a function of frequency for at least one fluid mode, and determining th...

A lightweight, high-strength proppant is disclosed, comprising the formation of finely dispersed ceramic precursors and sintering at low temperatures, causi ng the formation and retention of mesopores and micropores in pelletized ceramic. A method of manufacturing such a proppant is also disclosed, comprising the steps of manufacturing finely divided ceramic precursors and additives using grinding...

A cloth Venetian blind includes a winding cylinder, a plurality of cloth slats, at least two fixing ropes and a plurality of slat support rods. The cloth slats are arranged under the winding cylinder in parallel, respectively having two long sides and two short sides. The fixing ropes have an upper end fixed on the winding cylinder, extending down vertically through the two long sides of each clot...

A detergent composition adapted to clean paper making equipment Without the use of chlorinated compounds includes a phosphate sequesterant system, a non-foaming nonionic surfactant, a polyacrylic acid detergent polymer and, as a bleaching source, a combination of a peroxy compound and tetraacetylethylenediamine. Suitable peroxy compounds include sodium percarbonate, sodium perborate, and sodium pe...

A keyboard tray can be mounted on an articulating arm and has a passage extending from side to side. A mouse support is slidably mounted within the passage and has a closed position and an extended position. When extended, an outer end of the mouse support can be pivoted forward relative to the tray.

Various systems and methods are disclosed herein for determining the depth o f a cavity in a wellbore using the Helmholtz Effect.