Государственное Предприятие "Донецкий Государственный Научно-Исследовательский, Проектно-Конструкторский И Экспериментальный Институт Комплексной Механизации Шахт "Донгипроуглемаш"
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Priority to UAU200805124UpriorityCriticalpatent/UA36729U/en
Publication of UA36729UpublicationCriticalpatent/UA36729U/en
Hydraulic well standpipe has rod with upper support, cylinder with lower support, groundbush, sleeve placed between the cylinder and the piston of the rod, safety valve, loading device with loading valve of piston cavity. Besides that, the standpipe is equipped with loading device with loading valve of rod cavity and one-side hydro-lock, at that one-side hydro-lock is connected to output channels of loading devices of the piston and the rod cavities, and the sleeve is arranged as sealing with two-side action.
UAU200805124U2008-04-212008-04-21Hydraulic well standpipe
UA36729U
(en)