| 摘要 |
The invention relates to the area of well drilling, in particular to technical means for drilling underwater wells at shelf, and can be used for sampling earths in non-rock bed deposits. A core equipment includes a slide bush with axial channel and seat for the start valve, core tube and hydro-hammer with supercharge and discharge cavities, and with case and the body installed between the adapter with distribution chamber and the anvil of the hydro-hammer where a channel for connection of the gap between the case and the body is provided, with cavity of the core tube connected to the anvil. The discharge cavity of the hydro-hammer is connected with channel to environment. The distribution chamber of the adapter is connected with channels to supercharge cavity of the hydro-hammer and through throttle bush to environment. In the adapter a channel is provided, this is connected to the gap between the case and the body. The slide bush is placed in the cavity of the rod that is installed in distribution chamber with possibility of restricted longitudinal displacement and contact with its upper and lower surfaces. The channel in the adapter connected with the gap between the case and the body is closed with a rod. The cavity of the rod above the slide bush is connected to the pressure source, and the cavity beneath the slide bush is connected to distribution chamber with radial openings in the rod, those are arranged with possibility of connection with the channel in the adapter connected to the gap between the case and the body for simultaneous separation from distribution chamber. The slide bush is arranged with possibility to close its axial channel with the lower inner surface of the rod. |
