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Патент USA US2105091

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Jan. 1l, 1938.
2,105,091
c. w. MaqKAY
`- WELL DRILLING RIG
Filed April 4, 1956
5 Sheets-Sheet 2
`INVENTOR
Es WMAf KAY
i
»una
BY
_
ATTORNEY
.
Jan. 11, 1938.
C. w. MacKAY
»
.
2,105,091
WELL DRILLING RIG`
Filed April 4, 1936
3 Sheets-Sheet 3
I‘NVENTQR
L
«CHARLES W‘MACKAY
BY
.
.
..
ATTORNEYv
.
'
Patented Jan. 11,1938
2,105,001 i
- UNITED STATES
PATENT
OFFICE
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`
2,105,091
wmpammo are '
charles w. Mroxay, Tono. oklo. -'
Appliooiion April 4, 193s, serial No. 12.706
'
'
s oloims.
(c1. 255g-4),
This invention relates to apparatus for drilling
with a sump (not shown) into whichthe mud
overflow passes> from the pipe I1, leading from
mechanical arrangement for locating the power .the catch pit at the head of the hole.
plant for the drilling. closely adjacent to the drill
The pipe I3, held against rotation as described. `
itself so that the power plant 'and the drill' pro
extends down into the hole, and near its lower 5
oil wells and the like, and more particularly to a
gress together into the hole.
f
end it supports a power plant which, in the il
I purpose to discard the customary method of ‘ lustrative organization, comprises a plurality of
sinking a pipel into the hole, with the drilling tool specially adapted electrical motors, eaclrcylin
ñxed in relation to the wbottom extremity ofthe drical in form Vand elongated on the` axis of the pipe, and employing-the pipe with the function rotor, and of small and compact diameter.
of a shaft for rotating the tool by power applied
Three such motors 20, 2l, and 2_2 are illustrated
at the top of the pipe. According to my inven
on an enlarged scale in Figs. 3, 4, and 5. The
tion, the pipe is held against rotation andsup 'support .for these motors comprises a flange 23
ports the power plant at the bottom of-the hole. welded on the pipe I3 and bolted to an underly
so that the latter may rotate the tool in relation ing cap piece 24 shaped as shown in Fig. 4 to pro- l
to the non-rotating pipe.'
~
vide recesses 25 to receive the upper ends of the
l As will appear to those skilled in the‘art, great respective motor housings. The cap plate 24 is
advantages are derivable from the use' of an welded to the upper extremityof a chassis 26,
embodiment of this invention.
shown in horizontal section in Fig. `5, which is
In the drawings, Fig. 11s n largely diagram. preferably a forging having a recessed pocket for 20
20
matic section on a vertical plane indicating the each of the motors in which the motor is seated ,
, drilling apparatus during a boring operation, and and held by straps 21 attached to the forging, the
some _of the more or less conventional operating 'motor housings being held against rotation, '_as
mechanism on the surface of the ground.
-
by set screws 28.
Fig. -2 is adetail `section on a. horizontal plane
„ on the line 2-2 of Fig. 1.l
.
_
,
Fig. 3 is a. side elevation of a gang' of electric
"1' motors mounted on a chassis near the bottom of
~
.
.
As shown in Fig. 7,- the lower end of the chassis .25'
2B is provided with an annular flange 30, upon
which rests the lower end of each motor and
through which the motor shafts, project. 'I‘hus '
the well pipe and constituting. the power plant the motors are housed, and are confined at the top
ior rotating the drilling tool.v
by the cap plate 24,\at the bottom by the flange 35 30
Flgs."4, 5, and 6 are horizontal sections on thev on the chassis 26; and they are held laterally by
respective lines H, 5-5, and B--Iìv of Fig. 3.
Fig. 'l is avertical section on the line 1-1 of
Fig.
4.
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.
_.
‘
Figs. 48 and 9 are horizontal sections on re
spective lines 8--3 and 3_9 of Fig. '1.
y
40
the straps 21.
y
l
Secured .tothe lower end of the chassis“ is a
pipe 32 supplying in eifect an extension of the
bore through the center of the chassis. The up- 35
per end of this pipe 32 may be threaded into the
chassis, as shown in Figure '1, and then provided
Referring to Fig. l, the apparatus at _the surface
of the ground comprises the vertical timbers Il
and Il supplying vertical guideways (Fig. 2) for
a horizontal crosshead I2, which .embraces the
with awelded bead 33 for securely integrating the
pipe 32 to the chassis 2B. '.l‘he pipe 32 supplies
manner, as by having gripping jaws encircling
successive elements of a reducing >item' mechanism
not only a conduitfor the down~fiowof the.dri1i- 40
top part of the well pipe I3 and holds it against , ing mud, as presently described, lbut also serves
rotation. This may be effected in any practical as a non-rotatingshaft upon which are mounted
the well pipe I3, as illustrated in Fig. 2, so that
" the crosshead I2 and the’pip'e I3 are held- rig
idly in fixed relation while vertical _movement is
permitted, and rotary movement is prohibited, by
’ the engagement of the crossliead` I2 in the’ guide- ,
' ways of the timbers III Aand Il. Hoisting gear il,
50 is attached' to the upper end of theA pipe I3 'so'
that the latter is suspended and may be lifted
_ and lowered by the illustrated hoisting engine.
The indicated mud pump‘is connected by the
p_iping I5 to the upper end of thewell‘xpipe 13.
' The -intake pipe i6 ofthe pump
fo'r reducing the speed from that- of themotor
shafts to such speed as is desired for the rotation ß
cfthedrillingtool.
t
ì
-j
.
f In varying applications ot” my linvention to ’
suit different purposes' and conditions, Il may ., ,
»select from a wide range 'of characteristics'of
current and motor design. i ¿sone illustration. '§50>
lumier‘ rome conditions il; would terreni-able to -
employ a.v three-phase alternating: current within-»
quency range 'of 5 to 20. cycles'per second. cur-2» î i
rent o_ftllis #We oouldbesupplied at the-site by ß
2,105,091
a motor generator set (not shown) receiving onv 83, which is -also secured in place by a welded
its intake side such commercial current as is . .-bead 84. The ferrule 83 has an annular oblique
available, and delivering on its output side the; 5 face, as indicated in Fig. 7, which bears against
alternating current of a voltage, phase and fre--- *_ '. the roller thrust bearing 85, which is interposed
5 quency appropriate to the particular motor de--l between the ferrule 83 and the hub 86 which
sign. One practicable type of motor design would ' ' carries the tool. The hub 88 is bolted to the head
deliver within the range of 300 to 1200 R. P. M., :80 and rotates with the latter. The lower end of
which would be reducible to a tool speed within the hub 86 carries the drilling tool 81, which
the range 40 to 100 R.. P. M. It is to beL may be threaded onto the hub 88 and secured in
understood that the specifications just stated place by a welded bead 88. The tool 81, of any
are merely illustrative and there is a considerable desired rotary type, has a _suilicient maximum
range of choice as to the particulars mentioned, diameter to drill a hole vsomewhat larger than
within the skill of those experienced in this art. the maximum diameter of the power plant and
The controlling desideratum is'that the selected gear shell to allow for vthe upiiow of -mud and
15 current and motor design, and the reduction excavated material, around the exterior of the
apparatus.
_
gearing, be determined for the economical con
According to conventional practice in the art,
sumption of electrical power and a minimum
the maximum cutting diameter of the drilling
loss of power through reduction gears, eventu
ating inthe application' of adequate power to tool may be determined vby reference to the in
tention to insert casings into the' hole.
f
20 rotate the tool at practical working speeds.The hub 88 and the tool 81 have the axial bore
The electrical power is preferably fed to each
motor by a separate cable 34 secured by bands 88 which communicates with the bore of the pipe
or straps to the pipe I3 as indicated inFig. ,1. 32 so that there is in effect'a continuous hollow
Each motor shaft 35 has mounted on it a pinion conduit from the top-of the pipe I3 through that
25 38 which meshes with a gear 31 formed upon a pipe, the chassis 26, the pipe 32 and thence
hub 38 having an annular flange 38. ’I‘he hub 38 downward to the lower extremity of the tool 81.
rotates on the non-rotating pipe 32. In the As already stated, the mud pump indicated in
Fig. 1 forces the mud downwardly through this
flange 39 are mountedthree shafts 48, corre
sponding respectively to the three motors: Each continuous conduit and outwardly in the vicin
30 shaft 40 carries at its lower `end apinion 4l. ity of the tool, whence the mud is forced up
wardly, outside the drilling apparatus, and
These three pinions 4I have a planetary’move
ment about the axis of the pipe 32. The pinions through the drilled hole tothe surface of the
4I all mesh with a ring gear 42 fixed upon the « ground. This forced flow of the mud may per
interior of the cylindrical shell of this gear form a particularly important function, in the
85 mechanism; As presently described, this shell application of this invention, in that it tends to
act as a cooling medium, and to aid in keeping
is fixed to the chassis 28 and is therefore non
the motors and gearing from overheating. 'I‘his
rotatable. Hence, the ring gear 42 is non-rotat
able. 'I'he pinions 4| engage not only the flxed ' result is enhanced by the combined downñow of
ring gear 42 but also the gear 43 on a hub 44 the mud through the axial hollow conduit in
direct contact -with the metal piping which it
lio which rotates on the pipes 32. The gear ratios self
would take up a considerable portion of the
,are such that the planetary rotation of the pinions 4I ,drives the gear 43 at a speed less than heat generated by the motors, and then further
the speed of rotation of the gear 31. A ñoating by the upward ñow of the mud surrounding the
ring bearing'45 is interposed between the hubs apparatus again in direct contact with the ex
45 38 and 44. The hub 44 carries a ilange which terior of the gear shell and the motor housing.
According to conventional practice well known
in turn carries shafts for additional pinions »en
gaging an additional ring gear 48, and meshing in the art, there will be provided at so'me points
with another gear 41 on still another hub and on the pipe I3, preferably where it is accessible
driving the latter at a further reduced speed. above the surface of the ground, the elements
50 Similar units may be multiplied for reducing the of a measuring and indicating mechanism to
speed through any desired range. Finally'. the show the vertical tensile stress on the pipe I3
to permit proper regulation of the upward pull
drive rotates a hub 88 having aflange 6I, bear
on the pipe I3 through the hoisting engine, so
ing upon a corresponding iiange 82, upon a cap
piece 81 which closes the lower end of the shell as to enable the operator to avoid the applica
.tion of excessive loads on `the drilling tool.
-for the gearing. ` i
ì This shell consists of a cylinder 85, the upper This subject matter, however, is no part of the
end of which nts over the depending rim of the present invention and is considered unnecessary
'
ñange 38 and is welded thereto so that the shell to be shown in the drawings.
The illustrative form of the apparatus shown
et in erect is suspended from the chassis ze. The _
60 cap 81 `is threaded on to the lower end ofthe in the drawings may be readily assembled, and
shell 88 and is spot-welded thereto. Bolted to disassembled, for repair or replacement of parts.
the cap 81 is a packing keeper 88 providing a Where welded beads are employed for integrat
.packing gland 18. The interior of the shell 88 ing the diñerent parts, they may be removed
by a suitable torch and replaced according to
.is‘to besupplied with grease preferably intro
"‘duced under pressure through the aperture
1
closed by the `plug 1I.>
The hub ylilf‘which is the ñnal driven element
'of the described gearing, projects downwardly
'through ltlfeïicap 81 and past the'packlng gland
and upon its lower end »is threaded a tool
its., _18,
attaching
80 secured in place by welded
bead 8l.
.d 88 supplies' the means of
i
' driven-hub 88 pf‘ whatever
drilling tool ,isemployì‘edß At the' lower'l end of
fu insinua-routine
più* 3,1.
ordinary shop practice.
.
Ci
in
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iu
45
„l
60
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It is to be understood that the particulary em
bodiment of the invention shown in the drawings
and described above is only illustrative; and that
the invention may be variously embodied in di'f
ferent’ forms employing wide variations of me-` 70
chanical detail.
I claim:
.
-
'
1. A well-,drilling `ìapparatus.- comprising,I in`
combination, a sectional well- pipe constructed
to extend from the surface of the ground con- 75
3
2,105,091
tinuously to the vicinity of the bottom of the
the driving speed of the motors; the non-rotat
hole, and to supply a substantially rigid unit , ing well pipe. the motors and’ their cables, the
throughout its length, to resist both torque and reduction gearing and the drilling tool compris
vertical thrustland to supply a heavy downward' 'ing van
Gl thrust to aid in the drilling operation; means at
the surface of the ground for holding the well
integrated organization extending
throughoutl the length of the hole and movable 5
upwardly and downwardly, through handling at
pipe against rotation; means also at the surface
of the ground for raising. lowering and suspend
the top of the hole, as a structural unit.
1 3. A well-drilling apparatus comprising, in
ing the pipe and regulating its downward thrust combination, a sectional well pipe constructed
and the effect thereof on the drilling operation; to extend _from the surface of the ground con
means also at the surface of the ground for tinuously to the vicinity of the bottom of the
forcing iluid downwardly through the pipe; 'a . hole, and constructed to supply a substantially
, plurality of electric motors mounted upon the rigid unit throughout its length, to resist both
pipe >near its lower extremity, with their rotor torque and vertical thrust and to supply a heavy
axes parallel‘with each other and with the axis downward thrust to aid in the drilling operation;
of the pipe, said rotor axes being spaced from the means at the surface of the ground for holding
axis of the pipe and disposed with geometric the well pipe against rotation; means also at
symmetry around the axis of the pipe; a drilling the level of the ground for raising, lowering
tool rotatably mounted at the lower extremity
of the pipe; speed reducing mechanism driven
by said motors collectively for rotating the tool
at a speed substantially less -than the driving
speed of the‘motors; the mounting of the motors
upon the pipe providing substantially continuous
metal heat conduction from the vicinity of the
motor fields to the' interior of the well pipe, and
the motor casings being at least partially ex
and suspending the pipe and regulating its
downward thrust and the effect thereof on the
drilling operation; means also at the surface of
the ground for pumping , fluid downwardly
through the pipe; a plurality of electric motors
mounted upon ‘the pipe near its lower extremity,
with their rotor axes spaced from the axis of
the pipe and disposed' with geometric symmetry
around the axis of the pipe; a drilling tool rotat
posed to the external upflow of fluid forced ably _mounted at the lower extremity of the
through the lower extremity of the well pipe; pipe; and speed reducing mechanism driven by`
the non-rotating well pipe, the motors and their ' said motors collectively for.rotating the tool at '
current supply'cables, the reduction gearingand
_ the drilling tool comprising an integrated organ
ization extending throughout the length of the
hole and movable upwardly and downwardly,
through handling at the top of the hole, as a
structural unit.
2. A well-drilling apparatus comprising, in
combination. a 'sectional well pipe constructed
to extend from the surface _of the ground con-_
tinuously to the vicinity of the bottom ofthe
hole, and constructed to supply a substantially
rigid unit throughout its length, to resist both
torque and vertical thrust and to supply a heavy
downward thrust to aid in the drilling operation;
means at vthe surface 'of the ground for holdingV
the well pipe against rotation; means also at the
surface of the ground for raising, lowering and
suspending the pipe and regulating its" down
ward thrust and the effect thereof on the drill
ing operation; means also at the surface of the
ground for forcing ñuid downwardly through the
pipe; a plurality of electric motors mounted upon
the pipe near its lower extremity, with their ro- '
tor axes parallel with each other and with the
axis of the pipe, said rotor axes being spaced
from the axis of the pipeV and disposed with
geometric symmetry around- the axis of the pipe;
a drilling tool rotatably mounted at the lower
extremity of the pipe; speed reducing mecha
>nism driven by saidv motors collectively for ro
tating the tool at a speed substantially less than
a speed substantially less than the driving speed
of the motors.
.
^
4. A well-drilling apparatus comprising, in
combination, a non-rotating well pipe; means
for-raising, lowering and suspending the pipe;
means for pumping fluid downwardly through ,
the pipe; a plurality of electric motors mounted
upon the pipe 'near its lower extremity, with
their rotor axes parallel with each other and
with the axis of said pipe, said rotor axes be 40
ing spaced from the axis of the pipe yand disposed
vwith geometric symmetry around the axis of the '
pipe; a drilling tool rotatably mounted at the
lower extremity of >the pipe; and speed-reducing
mechanism driven by vsaid motors collectively for 45
rotating the tool at a speed substantially less
than the driving speed of the motors.
_
5. A well-drilling apparatus comprising, in
combination, a non-rotating well pipe;- means
for raising, lowering and suspending vthe pipe;
means for pumping fluid downwardly through
the pipe; a gang of three electric motors mount
ed upon the well pipe near its lower extremity
‘with their rotor axes parallel and spaced 120°
apart; a drilling tool rotatably mounted at the
lower extremity of the pipe; and speed-reducing
mechanism intermediate said motors and the
tool for'rotating the latter at a speed substan
tially less than the driving speed of the motors.
60.
CHARLES W. MACKAY.
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