| 摘要 |
The invention relates to branch of well drilling, in particular to technical means for well drilling with core sampling, and can be used for sampling soils in soft non-rock deposits. Core equipment has core tube and hydro-hammer with supercharge and discharge cavities, case and body installed between adapter with distribution chamber and anvil in which channel is provided, this is connected to gap between the case and the body, and pump with working chamber placed there, this is connected to environment and to cavity of core tube with system of channels and valves, rod installed on anvil at side of core tube, with spring-supported circular valve, slide bushing with axial channel and seat for start valve, this is placed in distribution chamber connected with channels to pressure source, gap between case and body, supercharge cavity of hydro-hammer and environment, channels between distribution chamber and supercharge cavity of hydro-hammer are connected to each other, at that in the last one throttle bushing is installed, and discharge cavity of hydro-hammer is connected to environment; spring-supported circular valve is placed in gap between rod and cylinder installed between anvil and core tube, outlet cavity of hydro-hammer is connected to environment with gap between case and body of hydro-hammer, channel in anvil, axial channels, reboring provided at outer side surface of circular valve and radial openings in cylinder, at that circular valve is arranged with possibility of closing radial openings in cylinder and connection of channel in anvil to cavity of core tube. Use of the invention proposed makes it possible to obtain decrease of forces of resistance at side surface at immersion of equipment and its lift from well and increase of rate of drill and length of travel in bulk non-stable rocks due to discharge of liquid for washing walls of well lower than hydro-hammer, this provides for prevention of contact of hydro-hammer with walls of well. |
