| 摘要 |
FIELD: mining.SUBSTANCE: hydraulic device contains a high pressure hydraulic channel, a mobile element, sealing elements and a housing fabricated with a chamber, with an inlet hole implemented with a possibility of hydraulic interconnection with the chamber, and with the bypass hole implemented with a possibility of hydraulic interconnection of tube side with annular space. The sealing elements and mobile element are placed in the housing. The high pressure hydraulic channel is tightly fixed in the inlet hole. The chamber is a buffer chamber. The device is also fitted with the external chamber with a spring function. Meanwhile the buffer chamber is located in the housing with a possibility of hydraulic isolation from the bypass hole and from the external chamber. The sealing elements are located between the buffer and external chambers and between the buffer chamber and the bypass hole. The mobile element is located with a possibility of tight reciprocating movement and fabricated with various cross section sizes. Meanwhile the size of cross section of the mobile element from outside of bypass holes or hole is less than the size of cross section of the mobile element from the external chamber.EFFECT: improvement of operational reliability of the device in wells with small diameters with the variable or low pressure of borehole fluid.25 cl, 5 dwg |
