close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2108419

код для вставки
'Feb, 15, 1938.
o. B. TROTTER
2,108,419
WHIP STOCK
Filed May 19, 1937
J
,/
,
34
M
a
R.
vm
m
mm.g\\.\lw.m1w,h
1
I l z
\_
BY
.
‘ Patented Feb. 15, 1938
2,108,419 f '
~ UNITED STATES PATENT OFFICE,
_
'
'
appueatziii?mltylrgt?iflx 143.4611
8 Claims. _(ci. 255-1)
to accommodate the drill bit. ' The upper section
. This invention relates to a device for controlling
the direction of bore holes and more particularly
it is provided with .a ring l4 adapted to engage '_
monly obtained and to provide means for clean
the knuckle joint‘ 20 shown in Figures 1. and 4.
This joint comprises Ia round projection on the
a drill collar i6 asby means of a left haniithread
to a whipstock for use in straightening‘ or chang
ing the direction in which an oil well is ‘being - ed connection it. The drill collar is of course
5 drilled. The principal objects of the invention secured to the lower end of the drill stem or string '5
in any suitable manner. The two sections of the
- are to provide a whipstock with means for in
whipstock are hingedv together as by means of
creasing the angle of deviation over that com
_ ing the hole where the whipstock is to be set. -
uppervend of the‘lower section and'a similarlyl0
10.‘ _In carrying out the invention, a-whipstock’ is
7 formed of two sections hinged together by means
of a knuckle joint, the bottom of the lower sec
tion being provided with a sharpened or wedge
shaped end at its forward face so that when the I
15 whipstock reaches the bottom of the hole the
shaped groove or socket in the lower end of the
upper section. A Whenjthe backs of'the two sec
tions are aligned, as shown in heavy lines in Fig
ure 1, a slight space 22 will exist in front of the
. joint 20 toallow for ajlimited movement of the 15
sharpened end will penetrate the formation caus
ing the lower section to swing slightly forward
about the-‘knuckle joint. Thus, the angle'of the
lower section with respect to the upper ‘section.
The lower end of the lower section is provided
with a sharpened or ‘wedge-shaped projection
24 at the front or face side of the whipstock. . -
deviation of the line'wh'ich the bit is to follow. ‘When the whipstock is hanging freely from the 20
20 will be increased over what it would be if the drill collar the lower section I! will be in sub- »
whipstock were in one piece. A longitudinal
passage is provided through both sections, and ,
the upper end of this passage is connected to the
- interior of the drill stem so that while the whip
v 25 stock is being lowered the drilling ?uid may pass
stantial alignment with the upper section lilies.
shown in‘ full lines in Figural.
However; when >
the lower end of the whipstock reaches the bottom
‘of the hole the} projection-24- will engage the g5
and because of the shape of this pro
downwardly through and out at the bottom of ' formation,
jection‘the further lowering of the whipstock will
the whipstock ‘so as to remove any detritus which
the lower section to move‘forward to the
inay have collected ‘in the hole below the whip cause
shown in dotted lines. Kit is assumed ‘ _
stock.‘ A valve in the drill bit or collar closes the ‘ position
30 opening to the passage in the'whipstock as soon' that the angle-by which the whipstock is tapered any
'7 as the whipstock is in place and the bit begins to .is of the order of 21/2“ this angle can be doubled
to 5° when the lower section has moved to its for
move down the whipstock face. ' All of the drill
position- and the whipstock will thus be
ing ?uid is then forced“ out through'the‘bit as is ward
doubly 'e?ective in straighteningior changing the
customary in rotary drilling practice. 1
- .35
For a better understanding of the invention
reference may be had to‘ the ‘accompanying draw
.inginwhieh--
.~-
-'
_.
,
.I
Figure '1 is a vertical elevation of the whip
stock ready to be lowered in the hole: ' ’
‘
, 40
Figure 2 is a vertical sectional elevation through.
'
the upper end of the whipstock showing the bit -
direction of the hole.
-
-
_
.
'
.
35
The whipstock sections l0 and I! are prefer- ~
ably formed of a non-magneticmetal so‘that the
device can be oriented in the hole through the
use of one of the usual/well surveying instruments,
the movable magnetic needle or member of which 40
would otherwise be de?ected by magnetic metal
and the valve for controlling the flow-1 of the
in the whipstock.
drilling ?uid;
of a- bore hole, it is desirable to clean that por- ' '
'
_
t.
Figure 34s a section taken on the line 3-3 of
'
v
.
F
*
'When lowering a whipstock near to. the bottom
I
tion of the hole below the whipstock so that the 45
45 Figure 2 looking in the direction of the arrows; I“ device
will'have a ?rm foundation in ‘the hole. , To
Figure 4 is _a .vertical section through ‘ the this vend, the upper and lower sections of the
' knuckle joint.'while
._
whipstock are provided respectively with longi
.
Figure 5 is a partial vertical section of aslightly
>
‘modi?ed form of the attaching means and the
50
valve.
-
i
.
'
'
'
., ‘i ‘ Referring tothedrawinma whipstockis illus-r
'
,trated as comprising anupper section In and a -
lower section i2, each of these sections being, ta.
tudinalpasaages 28 and _28, these passages be- _
ing in end to end-alignment at the knuckle joint 50
20-1 andthe adjacent ends-ofthe passages being'
slightly ?ared, as shown more clearly in Figure 4,
so that the drilling ?uid vcan'pass through the . ,
in uninterrupted ?ow even though the
pered with the thinner end uppermost and with whipstock
two sections may be slightly out of-line, as shown 55
' 55 the face I! slightly concave as shown ‘in Figure, 3,
2
2,108,419
in the dotted lines of Figure 1. The drill collar
i6 is also provided with a passage 30 connecting
with the usual opening in the drill pipe, not
shown. The drill bit 32 which is attached to the
drill collar [6 by means of the right hand thread
ed connection 34 is also provided 'with a longi
tudinal passage 36 opening at the bottom of the
bit so that part or all of the drilling ?uid passing
downwardly through the drill stem and the pas
10 sage 30 will pass outwardly ahead of the bit to
remove detritus in the .hole in the usual manner.
The drill collar I6 is provided with an opening
38 ‘connecting the passage 30 with the upper end
of the passage 26 in the whipstock and this open
15 ing 38 has an enlarged space 40 for accommodat
of this invention may be made without departing
from the spirit and scope thereof, and therefore
only such limitations should be imposed as are
indicated by the appended claims.
I claim:
’
1. A whipstock comprising an upper tapered
section and a lowered tapered section, a hinged
joint between said sections, said lower section
being provided at its bottom forward end with a
wedge-shaped projection, the arrangement being 10
such that the projectionwill tend to penetrate
the formation at the bottom of a hole so as to
move the lower section forward about said hinged
joint to increase the angle of deviation.
2. A whipstock comprising an upper section 15
ing a ball valve 42. A plug M threaded into the
drill collar serves as a valve seat for the ball 42
and a lower section, each section having an in
lower end of the drill stem in the usual manner.
In this position, as illustrated more ~-clearly' in
so as to increase the angle of deviation of said
clined face and being formed of non-magnetic
but in the position shown in the drawing the ball metal, a knuckle joint between said sections and
is held away from the seat lit-by means of a pin arranged so that the lower section may be moved
laterally in the direction of said face, said lower 20
20 46 secured to the whipstock directly across the
upper end of the passage 26. In operation, when section being provided with a chisel-like projec
it is desired to change the direction of a hole, the tion extending downwardly from the bottom of
bit 32 is attached to the drill collar M5 by means said lower section and in substantial alignment
of the right hand threaded connection 34 and the ' with said inclined face, said projection adapted
drill collar is then screwed into the ring member to penetrate the formation being drilled to cause 25
ill after which the drill collar is attached to the the lower section to move about said knuckle joint
Figure 2, the ball 42 will be held away from its
30 seat 44 by means of the pin 46 and as the whip
stock is lowered nearly to the-bottom of the hole
part of the drilling ?uid which is then pumped
downwardly through the passage 30 will pass
through the opening 38 and downwardly through
face.
3. A whipstock for controlling the deviation of
a well being drilled comprising a longitudinally 30
tapered portion, a ring formed at the upper end
of said tapered'portion, a longitudinal passage
extending downwardly through said tapered por
tion with an outlet opening at the bottom thereof,
a drill stem extending downwardly through said 85
the passages 26 and 28 and out at the bottom of
the whipstock where it serves to wash away any ' ring, a bit secured to said drill stem, means on
detritus which may, have collected in the hole. said drill stem for cooperating with said ring to
The whipstock is then set on the bottom of the support said tapered portion while the whipstock
is being lowered into the well, said drill stem and
hole by the weight of the drill pipe and the pro
bit being provided with a passage for conducting 40
40 jection 24 will penetrate the formation so as to
drilling ?uid into the well below the bit, and said
move the lower section 12 forwardly about the
drill stem being provided with a conduit con
knuckle joint 20 to increase the effective devia
necting the passage in the drill stem with the
tion of the device.
The drill pipe is then turned in a clockwise passage in said tapered portion, the arrangement
direction which causes the unthreading of the left being such that part of the drilling fluid will pass 45
hand connection l8 and the bit 32 is then rotated from the stem in to and downwardly through
down the face l3 of the whipstock.
As soon as . said tapered portion so as to remove detritus from
the drill collar I 6 is disengaged from the whip
stock ring “I the valve 42 will seat, closing the
passage 38 and causing all of the drilling fluid
‘ to pass through the drill bit. When it is desired
_ to remove the whipstock, the drill stem is pulled
the well below the whipstock.
4. A whipstock for controlling the deviation of
a well being drilled comprising a longitudinally 60
tapered portion, a ring formed at the upper end
of said tapered‘portion, a longitudinal passage
upwardly until it strikes the ring I4 and then
extending downwardly through said tapered por
turned in a counterclockwise direction to take up
tion with an outlet opening at the bottom thereof,
a drill stem extending downwardly through said 55
the left hand connection l8 after which the whip
' ring, a bit secured to said drill stem, means on
stock may be pulled out of the hole.
In Figure 5 is shown a slightly ‘modified form in said drill stem for cooperating with said ring to
which a drill bit 48 is shown connected'directly support said tapered portion while the whipstock
to the drill stem 50 by the usual right hand I is being lowered into the well, said drill stem and
60 threaded connection 52. The bit is provided bit being provided with a passage for conducting 60
drilling ?uid into the well below the bit and said
with an enlarged shank 54 adapted to be con
nected .to the whipstock collar 56 by means of a drill stem being provided with a conduit con
left hand threaded connection 58. The shank of necting the passage in the drill stem with the
passage in said tapered portion, a valve in said
the bit is provided with passages 60 and 62 corre
conduit normally closed by the pressure of the 65
65 sponding to passages 30 and 38 in the form dis
closed in Figure 2 and a ball valve 64 cooperates drilling fluid while the bit is being rotated to
with its seat 66 and an unseating pin 68 in the drill the hole, and means for‘ holding said valve
same manner described with reference to the
open while the whipstock is being lowered so that
form shown in Figures 1 through 4. In the form
70 shown in Figure 5 the operation is similar to that
already disclosed, a clockwise rotation of the drill
stem causing the disengagement of the left hand
threaded connection 58 'so'that the drill bit can
part- of the drilling ?uid will pass downwardly
through and out at the bottom of the whipstock. 70
5. A whipstock for controlling the deviation of
‘travel down along the face of the whipstock.
Obviously many modi?cations and variations
75
let at the lower end of said whipstock, a drill
stem, a drill collar on said stem, a bit secured 75
-:
a hole being drilled, a longitudinal passage ex
tending downwardly through and having an out
I
3
. 9,168,410
extending downwardly through aid drill stem
to said drill collar, means for supporting said and bit, a second passage extending downwardly
whipstockptrom said collar while being lowered through and having an outlet at the bottom of
into the well, said drill stem, collar and bit being
portion, a conduit in said bit con
provided with a passage for conducting drilling saidvtapered
necting‘ said ?rst mentioned passage with said
?uid downwardly and out into the‘ hole ,below second passage, a check valve adapted to close
said bit, ‘a conduit in said drill collar connecting said conduit when said bit and collar are dis
the passage in said collar with the passage in joined and means for rendering said valve inop-_
said whipstock, a ‘valve in said conduit adapted
to be closed during drilling ‘operations of the bit, erative when said bit and said ring are in threaded.
and means tor holding said valve open while the
10 whipstock is being lowered in the hole.
‘
connection.
8. A whipstoclrior controlling ‘the' direction 'of'
6. A whlpstock comprising“ an upper section
and a lower section, said sections being formed
a drill bit secured to a drill collar by a right
of non-magnetic metal, a hinged joint between
of said tapered portion, a left hand threaded con 16
nection between’ said ring and said collar, a pas
said sections, said lower section be ' provided
15 at its bottom forward end with a w
e-shaped
projection, the arrangement being such that as
the whipstock is lowered the projection will tend
to penetrate the formation and to move the lower
hand threaded connection, comprising a longitu
dinally tapered portion, a ring at the upper end
s'age extending downwardly through said drill
collar and bit, a second passage extending down
wardly through and having an outlet at the bot
20
said hinged joint so as to ' tom of said taperedjportion, a conduit in said
20 ‘section forward about deviation, said upper and collar connecting said ?rst mentioned passage
. increase the angle of
said second passage, a check valve adapted
lower sections being provided with substantially with
to close said conduit when said collar and ring
,
passages for conducting
‘ aligned longitudinal.
are disjoined and means for rendering said‘valve
drilling ?uid downwardly through said whipstock inoperative
when said collar and said ring are 25
as the latter is being lowered into a well, said in threaded connection, said means including a
25
passages being connected in end to and relation ' 'pin disposed across the opening of said second
through said hinged joint.
passage adjacent said conduit and adapted to
7. A whipstock for controlling the direction 0! hold
said check valve open when said collar and
a drill bit secured to a drill stem, comprising a
30
ring
are
in threaded connection.
‘
longitudinally tapered portion, a ring at the upper
30
end or said tapered portion, a threaded connec
91min. ‘mom.
tion between said ring and said bit, a passage
Документ
Категория
Без категории
Просмотров
0
Размер файла
494 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа