Государственное Высшее Учебное Заведение “Донецкий Национальный Технический Университет”
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Priority to UAU201210600UpriorityCriticalpatent/UA77821U/en
Publication of UA77821UpublicationCriticalpatent/UA77821U/en
A device for releasing a comprises a body with radial openings and ledge at the inner surface, a hollow rod with anvil concentrically installed in it with capability of transfer of rotation, piston-hammer placed in the circular space between the body and the rod lower than the anvil on partition rigidly connected to the rod, with check valve. The cavity over the piston-hammer is arranged as a low pressure chamber insulated from the space in the drill string with piston that is rigidly connected to the anvil. The cavity of the rod and the space in the drill string are connected with a channel arranged in the piston, and in the low pressure chamber elastic element is placed.
UAU201210600U2012-09-102012-09-10Device for releasingastuck drill string
UA77821U
(en)
multi-chamber with ultra-high-pressure or hydraulic motor-compressors or motor-pumps for compressing gas or liquid at ultra-high-pressure, consisting of several concentrically sized different chambers, where each chamber contains smaller chambers inside