Ивано-Франковский национальный технический университет нефти и газа
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Structures Of Non-Positive Displacement Pumps
(AREA)
Abstract
Device for rotation of string of pump rods consists of support bearing placed between suspension of string of pump rods and clip of polished rod. At whole length of string of pump rods protectors are placed, those consist of paddles one facet of which is arranged as acute angle to axis of the rod in such way that at motion of string down formation of torque in direction of screwing-in threaded rod joints is provided.
UAA200711768A2007-10-242007-10-24Device for rotation of string of pump rods
UA88804C2
(en)
Water treatment compositions comprising a coagulant containing aluminum and a natural non-derived polysaccharide, wherein the ratio between the polysaccharide and the coagulant is between 1:10 to 1: 100; and methods of use.
Compounds derived from nitrogenous heterocycles, modulators of crth2; pharmaceutical composition; and its use to prepare a useful medicine in the treatment of asthma, allergic dermatitis, allergic rhinitis, chronic bronchitis, idiopathic pulmonary fibrosis, among others.