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Патент USA US2109031

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Feb. 22, 1938.
J. C. O’ NEAL
2,109,031
‘ FULL HOLE CASING OR TUBING HEAD
Filed July 16, 1936
\\'
5 Sheets-Sheet l
‘ Feb. 22, 1938.
J. c. o' NEAL
7
2,109,031
FULL HOLE CASING OR TUBING HEAD
Fiiled July 16, 1936
a Sheets-Sheet 2
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48 _
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I James QO'Neai
3mm
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FebZZ, 1938.
J. c. O’NEAL
'
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FULL HOLE CASING OR TUBING HEAD
Filed July 16, 1936
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‘
2,109,031
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3 Sheets-Sheet 3
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Patented Feb. 22, 1938
‘
2,109,031
UNITED STATES PATENT OFFICE
2,109,031
FULL HOLE CASING 0R TUBING HEAD
James Conn O’Neal, Beaumont, Tex., assignor to
Gulf Coast Machine & Supply Company, a cor
poration
Application July 16, 1936, Serial No. 90,831
13 Claims.
My invention relates to a well head construc-
(01. 285—22)
Fig. 3 is a broken sectional detail illustrating‘
tion to be used on casing or on tubing as the
case may be.
It is an object of the invention to provide a
5 head for use on casing or tubing which provides
the sealing means employed with the inner pipe.
Fig. 4 is a transverse section on the plane 4-4
of Fig. 2.
Fig. 5 is a similar transverse section on the 5
a full cylindrical opening therethrough for the
performance of drilling and setting operations
and which has no obstruction therein to hamper
the operation of drilling, setting pipe and the
10 like.
plane 5—5 of Fig. 1.
Fig. 6 is a broken section on the plane 6—6 of
Fig. 5.
Fig. '7 is a broken side elevation of the housing
for the operating stem.
10
It is a further object, in connection with a
Fig. 8 is a broken sectional detail showing the
full hole structure of this character, to provide
inner face of the operating device in latched posi
an adjustable support for the inner concentric
tion.
casing or tubing which is to be hung in the head.
15
It is an object of the invention to provide a
support or hanger for the inner pipe which may
normally remain in a retracted position so that
the operations of drilling or completing of the
well may be performed without interference, but
20 which may be advanced into- position to support
the inner pipe whenever desired.
It is a further object of the invention to provide a supporting device of this character which
is easily and positively operated from retracted
25 to advanced position uniformly and with a minimum of effort.
It is a further object of the invention to provide a supporting device of the character stated
which will be latched in either operative or inop30 erative position.
It is a further object of the invention to provide a head of the character stated upon which
other operative devices such as valves and blowout preventers may be mounted, but which may
35 be reduced in diameter when the inner pipe has
been hung in position so that further operations
may be performed through a pipe of smallerv
diameter.
7
I desire to provide a head for the casing which,
40 when an inner Pipe 01‘ Casing has‘ been hung
therein, may be dismantled so as not to interfere
‘
Fig. 9 is a similar view showing the latch in
open position.
15
While it is understood that my invention may
be employed for use upon either a casing or tub
ing I have illustrated the same in this invention
as applied to a casing l which may be under
stood as extending down into the well for the 20
desired distance. Upon this casing is mounted
a casing. head 2 constructed in accordance with
my invention and having its upper end threaded
with a coarse thread on its outer surface at 3 for
engagement with .a removable adapter ring 4. 25
Said ring it when mounted upon the casing head
forms a ?ange projecting radially from the upper
end of the head and is formed with longitudinal
openings 5 therethrough to receive bolts 6 by
means of which the casing head may be con- 30
nected to an upper ring 1, which serves to clamp
upon the casing head an adapter 8 which will
be later described.
The upper extremity of the casing head 2 is
formed to seal with the adapter 8 and has an an- 35
nular ridge 9 thereon to fit within the corre
sponding groove at the lower end of the adapter
8 and to compress packing in in said groove, thus
forming a sealing contact. There is also a row
of removable studs or pins H mounted in the 40
upper end of the head and projecting upwardly
With further Opel-‘$110115 Fherein in Connection
therefrom in a position spaced slightly from the
with the inner Strmg of plpeThe invention lies largely in the particular
inner periphery of the head. These studs are for
attachment with a subsequent device such as a
45 construction and arrangement of the parts which
make up my improved well head, WhlCh structure
will be more fully explained 1n connect1on with
packing gland or other means as will be later
noted
on the interior periphery of the casing head
thindra'lvgu?iaggnggé 1 is a Side View, partly
50 in elevation and partly in vertical section show~
and at a level about midway between the ends
men?“ I_f°rm 3' radlalbi extending groove '2 50
ing a casing head embodying my invention
equipped with well control apparatus thereon.
Fig.2 is aview similar to Fig. 1‘ but showing the
control apparatus removed and an inner string of
55 pipe supported therein.
'
within which a set of hanging dogs may normally
be housed- As will be Seen Particularly from ref
erence to Fig- 5, this groove is deep enough to
receive the dogs I3, which are housed therein, said
dogs when in normal position having their in- 55
‘2,109,031
ner faces flush with the inner face of the casing
head.
The dogs I3 are arcuate in shape and when in
retracted position, as shown in Fig. 5, fit closely
When the disc 26 is rotated to push the dogs
away from the disc and move them into retracted
position, as shown in Figs. 5 and 9, the pivotal
points at both ends of the operating arms 21 and
the disc will be again aligned so that a simi
against the inner wall of the groove !2 in which
they are housed. The dogs are comparatively
lar toggle effect is obtained, tending to hold the
short in length and a sufficient number are em
dogs in retracted position.
ployed to entirely ?ll the groove except for an
In the movement of the dogs I provide laterally
extending pins 3| on each dog which project
upwardly from the upper side of the dogs and 10
operating space or chamber if; at one side of the
10 casing head.
Each dog is linked to' the adjacent
dog by connecting links i5.
1
Said links are arc'ué
move within an undercut groove 32 and limit
ate in shape and are ?tted into grooves 56 in the
.themovement of the dogs inwardly. These pins
‘3| are wedge shaped with the apex extending
outer side of each dog.
A ‘pivotal connection
with the two dogs adjacent thereto is made by.
pins ii extending through the link and the adja
inwardly, and are thus formed so that if sand or
cent sides of the dogs.
the groove in‘ in the dog so as to allow a certain
shaped contour of each of the pins will tend to
displace the packed sand or other material and
allow the dogs to move to supporting position. In
amount of articulation between adjacent“dogs'
order to further assure the cleaning of the groove >
The inner side 'of each
link 15 is spaced slightly from the-lower side of
. .to ‘permit of- the ?exibility necessary in moving
from‘retrac‘ted position, ‘as shown in Fig. ‘5, to
the‘advanced p‘ositio‘n shown in Fig‘. 4. As will
be noted‘the grooves it in the vdogs do not extend
other materialpacks within the groove the wedge 15
or recess IS in the outer faces ofthe dogs and 20
keep‘san‘dj from packing therein I'provide one‘ or
more openings 33 in the vgroove i2 in the casing
head, these openings being normally closed by
entirely across the two dogs _ l3a and 53b adja
threaded plugs 34 which-may be ‘removed to pro
‘cent‘th‘e operating vmechanism. The groove is
vide attachment for a grease gun or other simi 25
lar device through which ?uid may be caused
beveled outwardly and the end‘of the dog is
rounded off to ?t within the space provided.
A chamber M is formed at one side of the cas
ing head within the ‘channel of the groove I2.
‘ At that point the casing head ‘is provided with an
outwardly extendingv boss l1 and a threaded
opening I8 is formed at that point. ‘Within this
threaded opening is ?tted a sleeve I9, which acts
‘as a support for an operating ‘stem '20, which ex
tends back axially through the, sleeve. The sleeve
vis threaded at its ‘inner end‘ to‘ engage withinp‘the
to flow around through the groove and displace
the sand or other material. A steam jet may also
be
used.
‘
‘
'
,
In the rotation of the stem 26, I provide a lat
erally extending arm 35 which may be screwed
diametrically through the stem. The ring or col
lar 36 ?tting about the stem-furnishes a bearing
for the outer end thereof within the sleeve. The
arm 35 extends through a slot 31 shown in Figs.
1 and 6, formed in the outer end of the sleeve l9.
opening ‘l8 and is‘ also Qthreaded at its outer end
Said slot extends about 180,“ around‘the sleeve
‘at 2| to engage with‘a cap '22 as shown in Fig. 2.
and at each ‘end of said ‘slot is formed an in
wardly tapered opening 38, which forms a recess
to receive a tapered latch member '38 formed
,The outer end of the sleeve is unobstructed but
on the inner ‘ends thereof the sleeve is closed
exceptfor an opening through which the operat
ing" Stein 2!!‘ may pass. A st‘ufiingbox is formed
within the‘sle‘eve about the stem 28, as shown at
23, to form a seal about the stem but ‘permitting
its rotationasv will be later noted. The inner
‘en‘dof the stem has a radial ?ange 24 thereon.
Extending inwardly from the ?ange 24 is a
squared head 25.
'
'
‘ The squared head ?ts within an operating disc
50 26 the construction of which maybe seen in Figs.
8 and 9.‘ Said ‘disc ?ts slidably upon'the end
‘of vthe operating stem but is rotated through the
30'.
upon the arm 35. As will be seen from Fig. 5,
the latch 39 ?ts slidably over. the armi35 and has
a sleeve 40, which acts as a housing around the
arm 35 for a spring 4! which ?ts between the
‘head 42 upon the arm 35 and the ‘latch member 45
39. It will be seen that when this arm 35 is to
be operated the operator will grasp the sleeve
'40 and pull it radially outward to release the
latch 39 from the recess ‘38. The'arm may then
berswung, around in the slot 31 to the other end
of its movement where the spring will force
the latch 39' into the recess 38 in the opposite
rotation of the stem, as will be obvious. vAl
position of the supporting member.
‘thou'gh this‘slidable connection is shown as‘in
With reference again to'Figs. 1 and 2, during
cluding a squared end for the disc, obviously a the drilling of the well through the casing head 55
, keyed connection could be used. 'I‘he'operating and the casing there will normally be above the
disc has at two points thereon an attachment for 1casing head ‘control equipment for the control
operating arms 21.
Said arms are connected to
the disc by ‘means of screws 28, which allows‘the
pivoting of the arms 21 thereon. The opposite
end‘of each arm 21 is connected by means of
[the link 26 with the end of the adjacent dog 13a
or l3b.
This link forms a pivotal and ?exible
connection between the arms 2'! and the dogs
which is designed so as to allow a certain amount
;
of the well under pressure. It is often found that
when the drill passes through formation contain
ing gas that danger-of blowout is present at all 60
times and the drilling is performed with appara
tus at the well head ready to close in thewell in
case a blowout is imminent.
In my device is
provided an adapter 8,v previously noted, for at
tachment to the upper end of the casing head.
of play during the operation of the device.
‘This adapter is employed to connect the casing
As will be seen from Figs. 8 and 9, the arms 21
are arranged so thatwhen the dogs are to be
blowout preventer or similar equipment‘ ‘which
head with the ‘lower end 43. of‘a master valve or
‘drawn together in supporting position the links
may ‘be placed atv the‘ upper 1 end of "the casing
will inter?t. When this is done the pivotal con
head. ‘The lower end of the adapter 8 is recessed
nection 3070f the‘link 294with the doglwill be on its inner side to provide vspace for the up-'
aligned ,withthe pins 28 on the dogs so ‘that a
toggle eifect‘isrobtained which tends‘to hold the
dogs in position so that ‘they cannot‘be. moved
apart. This‘will ‘be understood ‘from Fig. 8.
wardly projecting studs or bolts 1 I. This recess
'thusprovided‘ is closed on its inner face by a
sleeve“, which ?ts at its upper end against a
shoulder 45 on the interion-of'the adapter and
2,109,031
at its lower end rests upon the upper end of the
casing head. It will be seen that when the
adapter is clamped tightly against the casing
head the sleeve 44 will be held rigidly in position
closing the interior of the adapter and forming a
smooth and full opening downwardly through
the adapter and casing head.
On the lower end of the adapter is a short out
wardly extending ?ange 46 which provides an
uppe shoulder to engage with the ring ‘I previ
ously noted. This ring will have spaced open
ings to receive the bolts 8 by means of which the
ring may be bolted to the ?ange 4 of the casing
head. When the nuts have not been clamped
15 tightly to engage the adapter with the casing
head it will be seen that the ring or ?ange ‘l on
the adapter may be rotated with the ring 4 on
the casing head to allow the ring 4 to be screwed
on or off the head as desired.
When the nuts
are tightened upon the bolt 6 the adapter and the
casing head will be clamped rigidly together as
is common in ?anged connections thus forming a
seal. At the upper end of the adapter 8 is a
?anged connection 41 or any preferred alterna
25 tive type of construction which needs no speci?c
description.
'
3
and threaded at approximately the correct posi
tion for hanging. The coupling is placed thereon
together with the sealing rings 55 and the support
therefor. When it is desired to hang the same
after casing 48 has been cemented at the bottom
the lift nipple'50 is employed to pull upwardly
and exert a stretch upon the string of pipe 48 and
bring the lower end of the coupling 49 into posi
tion above the hanger dogs. The post or stem 20
is then rotated to throw the hanger dogs inwardly 10
into the position shown in Figs. 2 and 4, thus
forming a supporting shoulder upon which the
coupling may be lowered. When this is done the
weight of the inner string upon the pipe will tend
to force the ring 54 upwardly into position shown 15
inv Fig. 2, thus compressing the packing rings 55
and forming a seal. When ‘this portion of the
hanging is done the arm or pin 50'which oper
ates the stem 29 may be unscrewed and pulled
outwardly and released from the said stem. A 20
cap such as is shown in Fig. 2 at 22 may then be
screwed over the end of the same forming a clo
sure around the stern and leaving the pipe prop
erly supported on the dogs I3.
I then unscrew the threaded ring 4 from the 25
casing head, insert the packing rings 51, and
When the condition of the well necessitates
the hanging of an inner string of casing or tub
place the gland 58 upon the packing rings 5i
ing within the casing head, the said inner string
said rings 5'! in sealing position.
which is shown at 48 in Fig. 2 is lowered down
wardly into the well. , The master valve and blow
out preventer will be in position to guard against a
blowout at any time during this operation.
When the inner string is being set, and the
35 length of the pipe to be used is ascertained, the up
per end of the string 48 is equipped with a special
coupling 49 threaded for engagement with a pull
nipple 58 or other connection. The inner string
48 is then ready for setting and may be swung
40 from dogs 13 or from casing elevators while being
cemented. Control equipment and adapter 8
may be removed from the head when cement has
set or can be removed after well has been com
pleted. On its outer side the coupling 49 has a’
45 radial ?ange 5i above and below which packing
may be arranged to form a seal between said
coupling and the inner wall of the casing head.
At the lower end of the sleeve the outer diameter
of the coupling is decreased to form a downwardly
presented
shoulder 52 and at the lower end of the
50
coupling is threaded exteriorly to attach a ring
58 which forms'a stop member or support for a
ring 54 above which the packing rings 55 are
mounted. The supporting ring 54 is normally at
55 tached to the outer surface of the coupling by a
shear pin 55 shown best in Fig. 3. When in this
position the supporting ring 54 rests upon the stop
ring 53 and has above it the packing rings 55.
The ring 54 is adapted to be moved upwardly to
60 compress the packing rings 55 when the weight
of the inner casing string 48 is supported on the
ring 54. When this is done the pin 56 is broken
or sheared off and the ring is moved upwardly to
compress the packing.
Above the flange 5| are packing rings 51 upon
65
which may be ?tted a gland 58 whereby said pack
ing may be compressed. The gland 58 has a
laterally extending ?ange through which the studs
or bolts l ! may extend. Upon this ?ange I place
70 a ring 59 also provided with openings to ?t over
the studs H and nuts 69 are then employed to
compress the gland against the packing so as to
form a seal at that point.
In setting the inner string, it will be understood
75 that the upper end of string 48 has been cut off
and tighten the gland in place so as to hold the
I
The pull nipple 59 may be unscrewed and a
bell nipple or other protecting means may be
screwed therein so that drilling or other opera
tions may proceed through the inner string 48.
If‘ it is desired to set a casing head upon the inner
string 48 the attachment may be made within the .
upper end of the coupling 49, said casing head
being equipped with my improved form of hanger
if desired.
It will be noted that my hanger is particularly
desirable for handling the equipping of wells un 40
der pressure. The upper end of the well may be
sealed by means of blowout preventers or other
devices, allowing the pipe to be manipulated
through said blowout preventer or other devices
and through the head in the setting thereof and 45
when it is ready to support the pipe it may be
properly supported upon the coupling 49, which
is insertable downwardly through the control
equipment and head without endangering a blow
out. When the coupling 49 is in place the inner 50
string may be stretched and the hanging opera
tion performed without di?iculty. I provide a
strong and e?icient hanger which normally is
out of the way and does not interfere with opera
tions in the well but which can be easily advanced 55
to supporting position by the simple rotation of
the operating stem. The further advantages of
my invention will be obvious to those skilled in .
the art.
I claim:
1. A well head of the character stated includ
ing a tubular body threaded to engage a casing
and having a full hole cylindrical interior, means
at the upper end thereof for attachment to con
trol equipment, an interior annular groove, sup- '
porting dogs housed in said groove, said dogs
being linked together, and means operable from
the exterior of said body to move said dogs to
and from position projecting into said cylindrical
interior to form a support for an inner pipe.
70
2. A well head of the character stated includ
ing a tubular body threaded to engage a casing
and having a full hole cylindrical interior, means
at the upper end thereof for attachment to con
trol equipment, an interior annular groove, sup 75
2.109.031
porting dogs housed in said groove, said dogs
-8. A casing-head ‘having acylindrical passage
being linked together, a rotatable stem having a
sealing engagement through the Wall of said head
and means connecting the inner end of said stem
with said dogs whereby the rotation of said stem
Will move said dogs inwardly to supporting posi
tion or outwardly to a position housed in said
.therethrough, an inner groove in said head ex
tending horizontally about the passage, a plural
ity of dogs normally housed in said groove, said
groove.
3. A well head of the character stated includ
ing a tubular body threaded to engage a casing
and havinga full hole cylindrical interior, means
at the upper end thereof for attachment to con
trol equipment, an interior annular groove, sup-
porting dogs housed in said groove, said dogs
15 being linked-together, a rotatable stem having a
sealing engagement through the wall of said head
and means connecting the inner end of said stem
withsaid dogs whereby the rotation ofv said stem
will move saiddogs inwardly to supportingposi
tion. or outwardly to a position housed in said
groove, and means to latch said stem against
rotation.
’
.
.
,
,.
4. In a well having therein a plurality of con
centric strings of pipe, an outer casing,’ a casing
:25
cuate dogs normally'housed in said groove, links
connecting all but two of said dogs, a disc to
which said two dogs are connected, a stem on said
disc, and means to ‘rotate said stem and disc to 15
move said dogs ingsaid groove.
'10. A casing head having an inner passage, an
annular groove in the wall of said passage, arou
ate dogs normally housed in said groove, links
connecting all but two of said dogs, a disc’to
which said two dogs are. connected, a stem on
said disc, means to'seal about said stem, a latch
on
said
7
_
r
as said casing, an annular groove on the inner
groove, an inner pipe, a coupling at the upper
end thereof, a radial ?ange thereon ?tting within
said head, packing means below said ?ange, a 3O
ring below said packing .means adapted to seat
upon said dogs when said dogs .areadvanced in
wardly and means to move said dogs positively
into and out of said passage to support said. inner
pipe operative from the exterior of said head, the 35
Weight of said pipe acting ,to compress said pack
ing.
,
'
Y.
12. A casing, a casing head thereon having a
connectjcontrol equipment thereto, a ring having '7
threaded attachmenton the exterior upper end of passage having approximately the same diameter
said head to form a-?ange thereon, an upwardly as said casing, an annular groove on the inner 40,
presented shoulder adjacent the lower end of said surface of said head, arcuate dogs housed in said
adapter, a ring ?ttingabo've said shoulder, bolts, groove, an inner pipe, ac‘oupling at the upper end
thereof, a radial flange thereon ?tting Within
extending through said rings to .clamp said adapt
said head, packing means below said flange, a
er to said head, said rings being rotatable simul
taneously when screwing said threaded ring on ‘ring below saidv packing means adapted to seat
upon said dogs whensaid dogs are advanced in
said head.
'
6. A casing head having a cylindrical passage wardly and means to move said dogs positively
into and out of said passage to support said inner
therethrough, an inner groove in said head ex
pipe operativefrom the exterior of said head, the
tending horizontally about the passage, a plu
rality. of dogs normally housed in said groove, a weight of said pipe acting to compress said pack 50
stem extending through the wall of said head ing, and means above said ?ange to seal between
said coupling and said head, said last named
into'said groove, a disc-shaped head on said stem,
and links pivotally connected to said head and means also acting to resistupward movement of
to said dogs to move said dogsinwardly and out
13. A‘ well casing, a casing head thereon. having
wardly in said groove as said stem is rotated.
.55
'7. A casing head having a cylindrical passage an inner cylindrical passage, an inner pipe, well
control equipment above said casing through
therethrough, an inner groove in said head ex
tending horizontally about the passage,va plural,
which-said pipe may be moved vertically, a cou
ity of dogs normally housed in said groove, a-stem pling on said pipe, a ?ange on said coupling ?tting
extending through the wall of said vheadinto within said casing head, seal rings below said
said groove, a disc-shaped head slidably'mounted flange, a sup-portinglring for said seal rings be
on saidrstem, and links pivotally connected to low the same, and means operative from the out
said head and to said dogs ;to move said dogs side of said casing head adapted‘to be positively
inwardly and outwardly in said groove as said moved inwardly or outwardly below said support
stem is rotated, the pivotal connections on said ing ring to support or release said pipe when de
links being aligned in both inwarda'nd outward sired.
positions of said dogs.
JAMES CONN O’NEAL.
said
65
'
surfaceof said head, arcuate dogs housed in said
centric strings of ,pipehanouter casing, ,a casing
,60
'
threaded attachment on the exterior upperend
of said head to form a flange thereon, an up
head thereon, an adapter on said casing head to
555
stem.
11. A casing, a. casing head thereon having a
passage having approximately the same diameter
means between the adjacent ends of said head
and adapten'and means in said casing head to
support an inner string of pipe.
5. In a well having therein a'plurality of con
.50
disc will move said dogs.
9. A casing head having an inner passage, an 1O
annular groove in the wall of said passage, ar
headthereoman adapter on said casing head to
connect control equipmentthereto, a ring having
wardly presentedshoulder adjacent the lower end
of said adapter, a ring ?tting above said shoulder,
means connecting said rings together, sealing
45
dogs being linked together to allow limited pivot
ing movement between adjacent dogs, an operat
ing disc, two of said dogs being operatively con
nected with said disc whereby the rotation of said
pipe.
'
'
.
.
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