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I Oct: 1, 1946.
Fileii March so, 1942
'7 2 Sheets-Sheét 1
Patented Oct. 1, 1,946
PATENr'oFFlcE, . ‘
a; Daniel A. Bennett and Augusta. Meier, Oil City,
.-I_'a., assignors to Oil Well; Supply. Company, a
.. ' corporation of New Jersey
] Application March so, 1942, Serial No. 436,908
-1 Claim. (01. 255-119)
2 of the hoist as by means of a belt drive 3 and
driving a slush pump D through a belt drive 4.
The hoisting unit B includes a rotary drive shaft
5, line shaft 6 and drum shaft 1. The rotary
drive shaft 5 may be driven from the jack shaft
2 by a driving connection 8, and line shaft 6
may be driven from said jack sha’ftby drive 9,
the lineshaft driving the drum shaft through a
taryvdrilling units of the character comprising a
rotary and a prime mover directly driving said
~~While drilling units of the character stated are
generally suitable for their intended purpose, it is
‘sometimes desirable or necessary to provide for
auxiliary or emergency drives 'to or from said
5unit, as when power failure occurs, either by fail
ure of 'the'prime mover of the drilling unit or of
the prime mover of the hoisting apparatus of the
drilling rig. Various means have been provided
heretofore ‘for such purposes, but the same have
certain disadvantages as hereinafter pointed out.
by‘a prime mover C connected .to the jack shaft
“Q-This invention relates to'improvements‘ in ro
connecting drive. l0. - The said. interconnecting
' drives of the hoisting unit are diagrammatically
illustrated, since such drives are well known and
understood in the art.
r The drilling unit A is mounted upon a pair of
, ,For example, separate auxiliary sprockets and 15 skids or supports H, and includes a prime mover
chains have been provided for emergency drives
to and from the drilling, unit, together with
clutches and the like for engaging said drives.
‘While such devices will effect the ultimate result
desired;-they~are cumbersome-and expensive, and 20
ig'enerally'involve considerable delay in connecting
"tervalswhen‘they are not being used forauxiliary
converter, diagrammatically indicated at T. The
wear and power cost, and presenting a constant
hazard "and source of injury to men and app-a
transmission connecting means or shafting be
tween the prime mover and the rotary shaft 12
is interrupted at two spaced intervals, at which
-.intervals, suitable separable couplings l3 and M
are provided. Said couplings are preferably of the
type providing for shaft misalignment and pos
sessing the capacity to be quickly engaged and
disengaged. For example, couplings of the cut
-The principal object ‘of our invention is to
eliminate the-complexity and numerous parts of
such auxiliary or emergency drives to enable ef
?cient and immediate power transmission to or’
from the drilling unit when desired.
drilling unit, whereby a separate drive or power
transmission is provided to or from the drilling
uni-t. The rotary shaft I2 is connected with the
when employing an internal combustion engine
for said prime mover, in which case the power
of the engine E is transmitted through a torque
" or emergency purposes, producing unnecessary
an auxiliary or-emergency driving means for said
prime mover E through a reduction gear F, as
‘and disconnecting the same. Further, they must
be driven at all times, including the greater in
E connected with and driving the rotaryR. The
present invention has to do with the provision of
Our invention contemplates the employment of
a single auxiliary or emergency drive connection 35 out type may be employed, one of which is shown
in detail in Fig. 2.
between the drilling unit and other powered ap
paratus, as for example, a hoisting unit, which
drive will remain inactive when not in transmis
sion of power, but which may be instantly en
gaged or disengaged when desired.
40 ment I6 is keyed to the connecting shaft H, the
latter shaft being separate from the rotary shaft
and forming a connecting element with the prime
Additional objects and advantages will become
apparent from the following description taken in
mover E through the reduction gear F. A hous
connection with the accompanying drawings,
Fig. 1 is a plan view of a rotary well drilling ap
ing l8 encloses the gear elements I5 and I6 of
45 the coupling, said housing including internal gear
paratus including a drilling unit embodying our
Fig. 2 is an enlarged sectional view taken on
the line 11-11 of Fig. 1; and
Figs. 3, 4 and 5 are diagrammatic views-illus 50
trating the three operating conditions provided
by our invention.
The couplings as shown each include a gear
element l5 secured to one shaft, as the rotary
shaft I2 in coupling l3, and a similar gear ele
portions lsadapted to. mesh with the said gear
elements when the coupling is in connecting or’
transmitting position, which position is shown in
full lines in Fig. 2,
To disengage the said coupling the housing
I8 is moved longitudinally to the left in Fig. ‘2,
thereby disengaging the gear elements l5 and I6,
and preventing transmission of power between
Referring to the drawings, Fig. 1 illustrates a
the shafts l2 and IT. A set screw 20 is mounted
rotary well drilling rig including a drilling unit
A and a hoisting unit B, the latter being powered 55 in the housing l8 and extends into cooperative '
, r
position with respect to an annular collar 21 on
the gear element l5, said set screw functioning
to retain the coupling in engaged or disengaged
position by preventing longitudinal movement of
the housing with respect to said annular portion
E. The sprocket 23 is shifted to engage the spline
22—-24, whereupon the sprocket 23 and its chain
the rotary drive shaft 5, from whence the power
may be transmitted to and from the hoisting unit
and the gear elements from one position to the
in accordance with the transmission facilities of
other, it only being necessary to withdraw said
set screw out of interfering position with the
annular portion 2| in order to actuate the cou
pling in the manner described.
While shifting means may be connected with,
the housing l8 if desired, the housing is readily
and easily slidable in relation to the gear ele
that unit.
Fig. 5 illustrates the operation-of our invention
21 are driven from the prime mover E to drive
for an auxiliary or emergency drive from the
hoisting unit or other powered external means to
the rotary. For such operation, the coupling [3
is in engaged or transmitting position and
sprocket 23 is connected to its shaft by the spline
ments l5 and [6, so that the same maybe moved
means 22--24, with coupling M in disengaged or
by hand when actuating the coupling to engaged,
non-transmitting position, whereby the power
applied to chain drive 2'l--23 by the hoisting unit,
is transmitted directly to the rotary R.
or disengaged position.
Mounted on the shafting between the couplings
l3 and Hi, we provide an auxiliary drive means
including a spline collar 22 secured to the con-.
necting shaft I1, and a sprocket or drive member
23 freely rotatable on said shaft, said sprocket
having an internal spline portion 24 adapted‘ to
engage the spline collar 22, A shifting collar 25
is provided for the sprocket 23, said collar being
‘actuated by a shifting lever26 mounted on‘the ~
drilling unit.
Sprocket or drive means 23 may be connected
.by a chain 2'! with the hoisting unit B, as by
means of a dual idler sprocket 28 freely rotatable
on the drum shaft 1 of said unit, the dual
Hence, it will be seen that we have provided a
simple‘ and efficient auxiliary or emergency drive
to or from the drilling unit, employing a single
auxiliary driving connection between said drill- .
ing unit and another power unit, which‘ connect
ing drive remains inactive during the operation
of either or both of said units in their conven
tional manner. The structure so provided is both
simple and durable, the parts of said auxiliary
drive remaining inactive during the greater pe
riods of time when the drilling and hoisting units
are being operated separately, thereby saving in
power cost and wear upon the parts of the mech
sprocket 28 being connected with the rotary-drive
anism, and materially reducing the hazard o
shaft 5 by a chain drive 29, whereby the power of
either the drilling or hoisting units may be inter
changeable for auxiliary or emergency driving
injury to men and apparatus.
Various modi?cations and changes are contem
plated within the scope of the following claim.
We claim:
The operation of our invention is illustrated in
In a rotary drillingwunit, the combination with
Figs. 3, 4 and 5. Fig. 3 illustrates the position of
the mechanism when operating the drilling unit
a rotary, of a prime mover therefor, connecting
shafting between said rotary and prime mover,
A in the conventional manner to drive the rotary
and an auxiliary drive for the transmission of
R by, means of the prime mover E-, couplings l3 40 power to and from the unit comprisingapair of
and M being in engaged or transmitting position,
spaced couplings disposed in said,‘ connecting
and sprocket 23 being free upon the shaft II. In
shafting and adapted to separatelyinterrupt the
such position, the rotary is driven without the
transmission of/power from the primemover to
transmission of power or motion to the single
the rotary, a transmission member freely rotat
auxiliary or emergency drive sprocket 23 and
able on the portionof said.connectingzshafting
chain 21.
between said couplings, and means for selectively
Fig.4 showsthe apparatus'in position" for aux
connecting the transmission. member- to said: por
iliary ‘or emergency drive to the hoisting‘ unit, in
tion of the connecting shafting.
whichcase, the coupling l3 is disengaged,‘ thereby
disconnecting the. rotary R from its prime mover 50.
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