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

Claim 0:
1. A method for supply of drilling liquid from a liquid storage comprising:
from a deck on an installation, conveying the drilling liquid down a casing string in a well with the help of a pipe handler comprising an elevator, and
supplying the drilling liquid via an uppermost casing of the casing string,
wherein the drilling liquid is supplied via a filling pipe to the uppermost casing during screwing of the uppermost pipe into the casing string where the filling pipe is extended by drilling liquid pressure during supplying the drilling liquid until the casing string is lowered down into a position where it is locked to the deck, and there is added liquid to a suitable level in the casing string,
wherein the filling pipe comprises:
an inner pipe,
a telescopically, axially moveable pipe end part with a constricted outlet which leads to the pipe end part being pushed axially outwards, 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 extend in an axial direction when the drilling liquid is supplied under pressure, so that the pipe end part is pushed outwards against a prestressing force, and is pulled back by said prestressing force when the drilling liquid supply stops 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, and
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 outwards 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 outwards 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.