IMPROVEMENTS IN MACHINES FOR CUTTING & DRILLING PIPES
Year: 1884

page_text: We, JAMES COMPTON MERRYWEATHER, and CHRISTOPHER JOHN WALLACE
JAKEMAN, Engineers, both of Greenwich Road S.E. do hereby declare the nature
of our invention for IMPROVEMENTS IN MACHINES FOR CUTTING & DRILLING
PIPES, to be as follows:-
These improvements specially relate to machines for operating on bore tubes in
wells in cases where it is desirable to perforate the tube at some distance down in
order to admit water from fissures or springs existing at various places in the
strata; or for cutting the tube from the inside at a given point in order to
withdraw the upper portion. The machines are constructed to be actuated by
ordinary well boring rods of any required length & without any other support
from the surface & are suitable for operating on tube wells. The machines may
manifestly be used for operating upon tubes in other positions. The construction
of the drilling machine is as follows: the working parts are contained in a case or
framework nearly filling the diameter of the bore tube. A vertical spindle serves
for connecting to the ordinary well boring rods & transmitting the power to the
drills. One or more drills (according to the diameter of the tube to be operated'
on) are carried horizontally in the frame with their axes at right angles to the
driving spindle & are driven by means of bevel gearing. The drills or drill
holders are screwed at the back end & pass through bevel wheels screwed in the
holes to form nuts. The drills are caused to advance by means of a second bevel
wheel on the vertical driving shaft gearing into the wheels forming nuts & having
the relative gearing slightly different to the driving gear; and similarly by
rotating the driving spindle in the opposite direction the drills, are withdrawn
from the holes. In order to prevent the whole apparatus from revolving while
the drills are being forced out to commence work the cylinder or frame is provided
with springs which press against the interior of the bore pipe. When it is
required to cut off a portion of the pipe or bore tube the machine is fitted with
one or more (three preferably) rotary steel cutters (similar to those in general use
for portable pipe cutters) which are carried in levers jointed on a disc or block
LP

page_text: which is rotated by the well boring rods. These levers are expanded & the cutters
forced out by means of a taper mandril caused to travel by a screw; the nut for
which is carried in the disc while the screw is prevented from rotating by springs
pressing against the interior of the bore tube. This machine may also be used
with flat cutters similar to an ordinary lathe parting tool. Vertical slots may be
made in the bore tube by giving either of these machines a reciprocating vertical
motion in addition to the feed motions before described.
r 1884.
C. J. W. JAKEMAN,
Greenwich Road, Greenwich.
J. C. MERRY WEATHER,'
Fire Engine Works, Greenwich, S.E.

page_text: We, JAMES COMPTON MERRYWEATHER, of Greenwich Road S.E in the county
of Kent, Engineer, and CHRISTOPHER JOHN WALLACE JAKEMAN, of Greenwich
Road S.E. in the county of Kent Engineer do hereby declare the nature of our
invention for IMPROVEMENTS IN MACHINES FOR CUTTING AND DRILLING TUBES
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
These improvements specially relate to machines for operating on bore tubes in
wells, in cases where it is desirable to perforate the tube at some distance down in
order to admit water from fissures or springs existing at various places in the
strata, or for cutting the tube from the inside at a given point in order to
withdraw the upper portion.
The machine is constructed to be actuated by ordinary well boring rods of any
required length and without any other support from the surface, and is suitable for
operating on tube wells The machine may manifestly be used for operating on
tubes in other positions.
The construction of the drilling machine may be as follows-
The working parts are contained in a frame which may be cylindrical as shewn
at A Figs 1 & 2, nearly filling the diameter of the bore tube. A vertical spindle B
is carried in a bearing and is connected to the ordinary well boring rod Č; at its
lower end it carries two bevel wheels D & E
One or more drills F (according to the diameter of the tube to be operated on)
are carried horizontally in the frame with the axes at right angles to the driving
spindle B, and are driven by means of bevel gearing; each drill or drill holder is
screwed at the back end G and passes through a bevel wheel H, screwed in the
hole to form a nut, and also traverses in a bevel wheel provided with a feather
taking into a groove in the spindle. The drill F being driven by means of one
pair of bevel wheels D and J is caused to advance by a second pair of wheels E
& H, the relative gearing of this pair being slightly different to the driving
gear D & J. Similarly by rotating the driving spindle in the opposite direction
the drills are withdrawn from the boles. In order to prevent the whole apparatus
from revolving while the drills are being forced out to commence work, the
cylinder or frame, is provided with springs L which press against the interior of
the bore pipe.
.
On the top of the bore pipe we fix by means of lugs and pinching screws, or
wedges a bush A, Fig 3 through which the top length of the ordinary boring rods
is worked, having a collar to support the weight of the rods. The rods may be
turned, thus operating the machine by an ordinary single or double ended lever
attached at right angles to the rods or by a device shewn in Fig. 3 consisting of a
frame B carrying the bush A as described above, and provided with one, or
preferably two bevel wheels C C on spindles running in suitable bearings and
fitted at the outer ends with crank handles D D for men, or a pulley or gearing for
the application of steam or other power. As it is impossible to tell the position of
the drill with regard to the hole, by observation, the revolutions of the rods may

page_text: be counted, or a device as shewn in Fig. 3 may be used. This consists of an
arrangement of wheels to reduce the number of revolutions required to perforate
the pipe, to a portion of a revolution on the wheel E, which is provided with
adjustable stops so that the machine will be brought to rest after the determined
number of revolutions for each hole has been made.
A worm & wheel or a screw on its spindle traversing the nut, or other reducing
gear may be used.
When it is required to cut off a portion of the pipe or bore tube the machine
is fitted with one or more (three preferably) rotary steel cutters similar to those in
general use for portable pipe cutters. In fig. 4, A is the outer cylinder or casing,
carrying at its lower end a disc B, (also fig 5, B); in this disc are three pins C, to
each of which is fitted a lever D carrying at the other end a rotary steel cutter E
as described above. Through the centre of the disc but not attached to it passes
a taper mandril F, the lower end being fitted with springs G pressing against the
bore tube, and the upper end being prolonged in a screw H; this passes through
and fits a screwed nut J, attached to the outer casing A. In using the machine,
by turning the boring rods attached to the outer casing A the revolving cutters E
are caused to travel round on the bore tube at the same time the mandril F is
caused to rise by the action of the nut J on the screw H, pressing outwards the
levers D and consequently the cutters E, which by this means are caused to cut
through the tube. This machine may also be used with flat cutters similar to an
ordinary lathe parting tool. Vertical slots may be made in the bore tube by
giving either of these machines a reciprocating vertical motion in addition to the
feed motions before described.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is
1. The system of operating upon well bore tubes in position for the purpose of
obtaining a supply of water from sources shut out by the tube.
2. The construction of drilling apparatus in the manner and for the purpose
substantially as herein set forth.
3. The construction of drilling and cutting apparatus for use in bore tubes
at any depth, actuated solely by one rod, substantially in the manner herein
described.