Patent ID: 11879309
Assignee: SMARTHOSE AS
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 7:
8. A device for delivery of drilling liquid to a casing in a well, the device comprising a filing pipe,
wherein the filling pipe comprises:
an inner pipe,
a pipe end part comprising a constricted liquid outlet configured to set up an overpressure in the filling pipe during the delivery of the drilling liquid,
an intermediate pipe part which is manually displaceable on an external surface of the inner pipe, and
a body mutually connects the pipe end part and the inner pipe,
wherein:
the pipe end part of the filling pipe is configured to telescopically extend in an axial direction outwards during supplying the drilling liquid by drilling liquid pressure and then to withdraw, and
the body is configured to be prestressed during the extension of the pipe end part, and which can pull the pipe end part back,

wherein:
the body comprises a spring connecting the pipe end part with the inner pipe part, or
the body is a volume defined by the inner pipe and the pipe end part which is filled with gas and configured to be compressed when the pipe end part is pushed forwards as a consequence of the increased drilling liquid pressure, and to be pulled back as a consequence of gas expansion when the drilling liquid pressure decreases, or
the body is an elastic body, and said body is stretched and tensioned when the pipe end part is pushed forwards as a consequence of the increased drilling liquid pressure, and the pipe end part is pulled back by the elastic body when the drilling liquid pressure decreases.