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Патент USA US2118094

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May 24, 1_938.
J_ M_ MCDO’NOUGH ET AL
COMBINATION >CASING HEAD AND CHRISTMAS TREE
2,118,094
2,118,094
Patented May 24, 1938
UNITED STATES -PATENT GFFICIE'.l
2,118,094
COIWBINATION CASING HEAD AND CHRIST
MAS TREE .
James Moore McDonough, Galveston, and Gran
ville A. Humason, Houston, Tex.
Application April 12, 1937, Serial No. 136,240
13 Claims. (Cl. 166-15)
'I‘he invention relates to equipment for well ceive a plurality of hangers therein on a common
heads and pertains particularly to the construetion of the casing head and the pipe hangers sup
ported therein.
In equipping the upper end of the well which
taper, a single holddown serving to retain the
casing head and hangers in a composite unit.
I ` Still another object is to provide a casing head
within which is provided a plurality of interñt 5
-ting, intersealing hangers connected to concen
tric strings of tubing.
Other and further objects of the invention will
outlet at the upper en'd of the Well which extends
up a material distance above the well head and be apparent from the following description taken
connect thereon a plurality of branching flow in connection with the drawing in which Fig. 1
lines through which the fluid from the Well may is a vertical section of a well head embodying110W under control. 'I‘his structure of ñow pipes the invention.
Fig. 2 is a horizontal section on the line 2-2
connected with the upper end of the well is ordi
'
narily called the christmas tree and is intended of Fig. 1.
Fig. 3 is a plan 'view showing the casing head
to provide a plurality of outlets for the fluid
plate which holds the assembly 1n a composite
from the. Well, each of which outlets may be con
trolled by valves or otherwise. When the well is unit.
.
' Fig. 4 is an elevation of the casing head plate
flowing under pressure it is diflicult, if not im
possible, with the ordinary installation to repair attached to the casing head.
the branch lines. When subjected to lateral
Fig. 5 is a section on the, line 5-5 of Fig. 1
strain as may be the case in a heavy 'storm some taken in the direction of the arrows.
lines are broken or damaged by parts falling
Fig. 6 is a vertical section through the shut oii
'
>thereon and it becomes a diilìcult problem to valve.
bring the well under control.,
The several strings of casing I, 2, 3 and 4 are
It is an object of the invention to provide a supported in concentric‘relation by a series of
series of ñow lines in direct connection with the tubing hangers 6, 'l and 8, which are arranged
casing head itself thereby enabling the> operator in concentric nesting relation, eachl of said hang
to protect the branch lines against damage.
ers being connected to an individual string of
It is also an object of the invention to provide tubing, The outermost member or casing head
a separate outlet for each of the concentric pipe 5 comprises a tapered ring which is threadably 30
strings extending laterally through the casing secured to the casing l. 'I'his casing head may
is provided with a plurality of separate concen
tric strings of pipe, it is common to provide an
10
15
25
30
head.
,
A further object of the invention is to provide
a well head comprising a casing head and a plu
35 rality of tubing hangers nested therein, the unit
having a separate outlet from each of the pipe
strings and transversely of the casing head inde
pendently of the relative rotational position of the
be provided with any suitable ñange or ears, not
shown, for attachment to supporting means to
assist in supporting the strings attached thereto and to resist other stresses to which the unit
may be subjected. The casing head is co-ex
casing head and the respective hangers.
tensive with the assembly comprising the tubing
hangers 6, 1 and 8 and has radial flow lines 9,
I0, Il and I2 attached to internally threaded
It is also an object of the invention to provide
a well head compact construction and which
bosses in the casing head walls. The inner wall 40
I5 of the casing head is tapered to receive the
therefore extends but a short distance above the
surface of the earth or, if desired, may be in
tapered surfaces of the respective tubing hang
stalled in the cellar whereby damage from ex->
45 ternal forces is minimized,
Another object is to provide a well head having
a valve seat in the ñow line and valve means for
closure with the seat to positively close the flow
line and permit repair on the line from the Well.
Another object of the invention is to provide a
50
well head having means adapted to close the ilow
line therein or to admit Wire line tools tc the
well.
A more specific object is to provide a casing
55 head having a deep bowl that is tapered to re
ers, while the upper face of the casing head is
provided with a plurality of drilled and tapped
openings to receive studs i6 which pass through
openings in a casing head plate l1 secured in
place thereon by nuts I8. The upper end of the
casing head5 and the casing head plate l1 are
provided with complementary grooves in which
is seated a seal ring I9 to form a iluid tight joint 50
between these members.
Seated Within the lower end of the casing head
is a tubing hanger 6 threadably attached to the
tubing string 2 above the internal threads 25.
The hanger is provided with a tapered bore 26 55
2
2,118,094
to receive a tapered end portion of the next ad
jacent hanger. The outer surface of the hanger
is grooved at 21 to provide a peripheral ñuid pas
sage which communicates with radial passage 28
in the casing head and with one or more radial
passages in the hanger 6. With this construc
tion it is apparent t'nat it is unnecessary for pas
sages 28 to be in mating relation with the i’iow line
I0. In order that the passage from. the annular
10 space between the tubing strings 2 and 3 be sealed
from adjacent spaces the hanger is also provided
with peripheral grooves above and below, the
groove 21 to receive packing rings 29. Above
these packing rings- is another peripheral groove
15 30 to receive the ends of set sçrews 3| which pass
through the Wall of the casing head 5 and enter
the groove to anchor the hanger in place.
To insure against leakage through the wall ofy
8.
Each of the sections 2| and 22 has a semi
circular wall which forms` a portion of opening
49. Extending diametrically from opening 49
each section is reduced in thickness to form ‘
overlapping portions 23, each of which is pro
vided with a tongue 24 to engage a complemental
groove 25. One of the studs |6 passes through
aligned' openings in each of overlapping por
tions 24. By means of this construction it is
obvious that cover plate |1 `is so constructed 10
that it is possible to install or remove the plate
without disturbing the assembly secured to
hanger 8 and at the same time without sacrifice of
mechanical strength of the assembled unit.
It will be apparent that a compact, sturdy
assembly has been provided -in which all of the
hangers have been enclosed in a single casing
head body 5 which has the deep bowl construc
the casing head 5 along set screws 3| the thread ' tion with a single tapered face I5 upon which
20 ed opening through the wall is counter-bored to
the several hangers are arranged to seat. When 20
receive packing 33, as is best seen in Fig. 2, the cover plate |1 is affixed a solid unitary assem
' which illustrates a like construction on the line
bly is effected which is completely enclosed.
2-2 of Fig. 1. The packing 32 is compressed
Attached to the threaded end section 41 of
within the counter-bore about the set screws 3|
the hanger 8 is a gate valve 60 having an up
25 by means of a nut 34 and gland 33, the 'packed ward extension 6|. If it is desired for any reason 25
joint thus serving also to lock the set screw in to close the passage from tubing string 4 to ñow
fixed position.
line I2 a valve generally designated as _63 is
The -hanger 1 is similar to the hanger 6 but is attached to the upper end of the extension 6|.
provided with a reduced end section 40 and a This valve comprises a. body'member 64 includ
30 packing ring 4| thereon to effect sealing en
ing an upward extension yoke 65 which is inter
gagement with the tapered surface 26 of the nally threaded at its upper end to receive a valve
hanger 6. Packing rings are also provided on stem 66, to which is fixed a hand Wheel 61. At
the peripheral surface of the hangerl above the lower end of the body 64 the valve stem 66
and below a fluid passage groove 42, which passes through an axial bore 68 provided with a
35 (similar to groove 21,in hangerv 6) serves as a
passage for ñuid from the annular space be
bolted> flange type stumng box having packing
69 held therein by gland 10 adjustably held in
tween the tubing strings 3 and 4 through the
position by nuts 1| on studs 12 in the body 64.
In order for valve member 52 to be self-seat
ing inthe valve seat 5| the connection between the
valve stem 66 and valve 52 is provided as illus
trated in Fig. 6. The valve stem 66 terminates
radial passage 43 to the flow line ||. As illus
trated in Fig. 2 and as described in connection
with the hanger 6, set screws 3| pass through the
casing head 5 and into the groove 3l) to hold the
hanger in position within the casing head.
'I'he hanger 1 extends to the top of the casing
head 5 and presents a conical cavity at its upper
45 end to receive hanger 8 attached to the tubing
string 4.- The upper end of the hanger 8 is re
duced to provide a shoulder 45 contacting a com
plementary surface on lthe casing head plate |1
whereby hanger 8 is held in place and the assem
50 bly is generally strengthened. The reduced end
41 of the hanger 8 passes through the opening
49 in the casing head plate |1 and is internally
threaded to receive an upward extension as will
be described. A peripheral groove 46 in the
'hanger provides a fluid passage to a flow line I2
from radial passage 48 in the same manner as
was described in connection with hangers 6 and
1. It is to be understood, however, that ñuid in
passing from the tubing 4 to the flow line t2 must
‘ pass radially through both of the hangers 1 and
8. Since a passage 48’ may or may not be -in
mating relation with the >llow line I2 a second pe
ripheral groove 44 »is- provided in the hanger 1 to
serve as a passageway whereby the fluid from
the tubing 4 may pass to :dow line I2 regardless
of the angular position of either the hanger 1
or the hanger 8.
v
The tubing string 4-is connected to thc hanger
8 through an adapter bushing 50 having a tapered
bore 5| adapted to receive a self-seating valve 52.
The cover plate I1 is of particular construc
tion as may be seen in Figs. 4 and 3, and com
at its lower end in a head 15 having a rounded
end 16 toy be received by a. complemental surface
in a. cavity 11 in the upper end of the valve
member 52. A flanged collar 18 surrounds the
>valve stem 66 and is threadably fixed within the
cavity 11. 'l'he length of this collar is insuil‘l-cient to rigidly hold the head 15 in contact
with the bottom of the cavity. In this manner
the valve member 52 may move both angularly
and rotatably relative to the valve stem 66 where
by the valve 52 may assume a position for proper
seating upon the seat 5| and at the same time
rotation of the valve upon the valve seat will
not occur during seating or unseating of the
valve.
When it is desired to utilize the valve 63 to
terminate flow from the well under pressure
through the `flow line I2 the gate valve 60 is
closed. The valve member 52 is moved to such
position adjacent the lower end of the body 64
by turning the handwheel 61 that when the valve
63 is screwed into position on stem 6| the valve
member 52 remains within the stem. It is thus
obvious that in this manner the stem is closed
to the ñow of liquid from the Well. The lgate
valve 60 is then opened by means of the hand
wheel 62 whereupon the valve 52 may be closed
upon its seat by turning handwheel 61, thus
closing the passage from _the flow line 4.
From the foregoing description of the appli
50
55
60
65
70
cants’ preferred embodiment, the construction,
operation and advantages-oi- the present inven
tion are‘ believed to be apparent and will sug
placed about the reduced end 41 of the hanger ' gest other modiñcations to those skilled in the 75
prises complemental half sections 20 and 2|
whereby the composite plate can be conveniently
art.
aria-co4
It is to be understood that the foregoing
disclosure is to be interpreted as illustrative and
not in a limiting sense, except as required by the
prior art and the spirit of the appended claims.
What is claimed as new is:
'
1. A combined casing head and christmas tree
lfor wells including a casing, a casing head se
cured at the upper end thereof, said casing head
3
having a valve seat at the upper end thereof,
and a valve movable to and from position to
engage said Valve seat and close oiî the flow
from said ñow line.
7. A combined casing head and christmas tree
for wells including, a casing head for attachment
toß the casing, an upwardly-flaring seat in said
casing head, a plurality of concentric strings of
iiaring upwardly to provide an inner, down-` pipe in said casing, a hanger on each radial out
wardly tapered seat, a plurality of concentric
f pipe hangers engaging at diiîerent _levels within
said seat,- a string of pipe on each hanger, a sep
arate outlet for each string-of pipe extending
radially outwardly from the upper end of each
let from each hanger through said casing head, 10
the inner of said pipes constituting the flow line
having a valve seat at the upper end thereof,
and a gate valve connected to the inner of said
hangers, the body of said gate valve extending
15 pipe through the hanger therefor and through
upwardly, means closing the upper end of said 15
a separate opening in said casing head, and a valve body, a valve rod extending downwardly
iiow vpipe in each of said outlets.
^ through said closing means and said gate valve
2. A combined casing head and christmas tree and a valve on said rod engageable in said valve
for wells including a casing, a casing head se
seat.
8. A casing head, a plurality of separate con~- 20
20 cured at the upper end thereof, said casing head
ñaring upwardly to provide an inner, down
centric pipe hangers supported therein, pipes
wardly tapered seat, a plurality of concentric pipe supported by said hangers, separate radial out
hangers engaging at successively higher levels lets from each hanger through said casing head,
within said scat, a string of pipe on each hanger, a valve seat in the inner of said hangers, a gate
25 a separate outlet for each string of pipeextend
valve body extending upwardly from said inner 25
ing radially outwardly from the upper end of hanger, a gate valve therein, a stuñing box, _a
each pipe through the hanger therefor and valve onsaid rod and means on said rod to move
through a separate opening in said casing head, said valve to and from said seat.
separate means to anchor each hanger in posi- ,
9. A casing head, a plurality of concentric
30 tion in said lcasing head, and a ñow pipe in each hangers supported therein, each of said hangers
of said outlets.
having a peripheral groove to form a fluid pas
-
3. A well casing, a downwardly-tapered casing sage, a tubing string attached to each of said
head thereon, a plurality of concentric strings of hangers and an outlet passage from each tub
pipe inside said casing, separate hangers for 4ing string through said casing head, said pas
35 said strings, each successive inner pipe being ex-` sage including a radial passage from within the 35
tended above the next adjacent outer one to hanger to said groove.
terminate at‘a higher point, radial outlet at the
10. A casing head, a plurality of concentric
upper end of each string extending/through its hangers nested within said casing head, a tubing
hanger and said casing head and 110W'` pipes con
string attached to each of said hangers, a valve
nected with each outlet.
r
4. A~well casing, a downwardly-tapered casing
head thereon, a plurality of concentric strings of
pipe inside said casing, separate hangers for said
strings, each successive inner pipe being ex
tended above the next adjacent outer one to
terminate at a higher point, a radial outlet at
the upper end of each string extending through
its hanger and said casing head and flow pipes
connected with each outlet, the inner- of said
pipes having an annular, upwardly presented
shoulder and plates secured to said casing head
and engaging said shoulder to anchor said
hangers in position.
'
.
5. A well casing, a downwardly-tapered casing
head thereon, a plurality of concentric strings of
pipe inside said casing, separate hangers for said
strings, each successive inner pipe being ex
tended above the next adjacent outer one to ter
minate at a higher point, a radial outlet at the
upper end of each string extending through its
hanger and said casing head, separate means
engaging each hanger with said casing head to
seat at the upper end of the inner tubing, a flow
line radially from said inner tubing and its
associated hanger, a stufling box closing the
upper end of said stem, va valve rod passing
through said stuiling box, a valve on the lower
end of said rod and means on said rod forv mov
ing said valve to and from said seat. .
l1. A casing head assembly comprising- a body,
a tapered bowl therein, a plurality of hangers `
to be stacked in said bowl to engage the taper
of said bowl, and a cap on' said body to engage so
the innermost of said hangers to clamp all of
said hangers in sealing position in said bowl.
12. A casing head assembly comprising a body,
a tapered bowl therein, a plurality of hangers
to be stacked in said bowl 'to engage the taper 65
of said bowl, a cap on said body to engage the
innermost of said hangers to clamp all -of Said
hangers in sealing position in said bowl, and
means to flow fluid laterally through each hanger
and said head.
60
13. In a well head assembly, a casing head, a .
set ofä nested casing hangers therein, each con
tacting with said head, a iiow passage laterally
through two of said hangers and said head, a
anchor the hangers in said casing head, and iiow
pipes connected with each outlet.
6. A combined casing headand christmas tree tubing hanger engaging within the uppermost
for wells including, Ateasing head for attach ' casing hanger, an adapter bushing in said tub
ment to the casing, an upwardly-daring seat in ing hanger, a tubing secured within said-bushsaid casing head, a plurality of concentric strings ing, and a valve adjustable to and from said
of pipe in said casing, a hanger on each string adapter bushing to control the flow of iluid from
_
7. supported in said seat, a separate radial outlet Said tubing;
from each hanger through said casing head, the
JAMES MOORE McDONOUGH.
inner of said pipes constituting the ilow line
GRANVIILE A. HUMASON.
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