An Improved Apparatus for Recovering Tubes in Artesian and other Boring Operations.
Year: 1898

page_text: Date of Application, 29th June, 1898-Accepted, 30th July, 1898
COMPLETE SPECIFICATION.
An Improved Apparatus for Recovering Tubes in Artesian and other
Boring Operations.
I, THEODOR SCHULTEIS, of Gustavstrasse, 10, Mulheim an den Ruhr, Prussia,
Manufacturer, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
The subject matter of the present invention is an arrangement by means of
which it is rendered possible to reseize and bring to the surface, any tubes which
may have been lost in deep-boring operations, and the like.
The arrangement is shown in the annexed drawing, in which :-
Fig. 1 is a vertical section, and
Fig. 2 a cross-section, in the line of section A, B, in Fig. 1.
The arrangement consists of a rod a which can be extended in length at will,
in the known manner, and which is introduced into the tube to be caught and
Underneath a rod-
which, at its lower end, is fitted with various eccentric discs.
The
stop b, the rod a has a square piece under which a cylindric smooth (plain)
part d and moreover a part e, provided with a screw-thread, are arranged. Three
equal cylindric pieces f g and h, provided outside with sharp screw threads, are
The three cylindrical
attached, successively, to the continuation (c, d, e) of rod a.
parts f, g, h which are smaller than the diameter of the tube, have eccentric holes.
The uppermost piece f as well as the lowermost are rigidly fixed to the rod a,
while the central part g can revolve on the smooth pin or cylindric part d.
a so-called "finder,"
lower cylindric part h may be provided with an extension
for easy and convenient introduction into the pipe to be recovered.
The central cylindric part g is adjusted, when the apparatus is to be used, so
that all the largest radii of the three parts f g and h point in the same direction.
The rod a is then introduced into the tube to be caught and as soon as the arrange-
ment has arrived at a suitable depth it is turned a little round its axis. Owing
to the catching of the screw threads on its periphery, the central cylindrical part g
will adhere to the inner side of the tube while the other parts f and h are turned
(that is to say by a few degrees only) until they too are brought to bear against the
inner side of the tube. Thereby the parts f g and h are forced away from each
other and pressed so tightly against the inner surface of the tube, or rather, the
screw-threads cut so much into the inner surface of the tube,-as to render it
possible to raise the tube r, by means of rod a, out of the boring.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
An apparatus for recovering lost tubes, characterised by the arrangement of
ssland one loose roller or disc a placed between the first-named two.

page_text: with eccentric bores and with screw threads on their periphery, attached to the
end of a rod a, each of which rollers has a smaller diameter than the lost tube,
while when in an extended position they will bear against the inner surface of the
tube and cut with their sharp screw-threads into the inner surface of the tube.
Dated this 28th day of June 1898.
J. E. EVANS-JACKSON & Co.,
Agents for the Applicant.