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Патент USA US3036644

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May 29, 1962
c. B. coRLEY, JR., r-:TAL
Filed Oct. 27, 1960
2 Sheets-Sheet l
-V/ /
May 29, 1962
c. B. coRLEY, JR., ETAT..
Filed OC’L. 27, 1960
2 Sheets-Sheet 2
FIG. 5.
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nidi ist@
without the safety valve attached and the associated or
auxiliary apparatus for conducting these operations also
Charles B. Corley, Jr., Houston, and Peter R. McStravick,
Tombaii, Tex., assignors, by mesne assignments, to .ler
are encompassed by the invention. In brief, the appa
ratus of the invention comprises an open-ended, tele
scoping production tubing provided on its lower end with
a safety valve with a latching mechanism adapted to latch
onto the upper end of the safety valve; means for anchor
ing the upper end of the production tubing in the well
head used to support the pipe in which the safety valve is
sey Production Research Company, Tulsa, Ghia., a cor
poration of Delaware
Filed 0st. 27, i960, Ser. No. 65,328
2 Claims. (Cl. 16s-67)
This invention relates to a production tube which con
nects to a subsurface safety valve and methods for in
10 or is to be arranged; means arranged on the production
stalling the tube into and retrieving the tube from a well
It is known to equip Wells with subsurface safety valves
to stop the How of production fluids when, for some rea
son, the wells’ production cannot be controlled. Valves
of this type have been especially useful in offshore wells
to prevent lblowouts when excessive ñow from the well
resulting from damage to the wellhead or other surface
equipment caused by storms, floating objects, or other 20
happenings necessitate halting of production.
Many of these valves are ñow velocity operated; that
is, they are designed to close oit the production flow con
Patented May 29, i962
tubing for sealing off the annulus between the produc
tion tubing and the inner wall of the wellhead :between a
production fluid flow conduit and a safety valve control
fluid ñow conduit; releasab‘le means initially retaining the
production tubing in collapsed position; and means ar
ranged adjacent the lower end of the production tubing
adapted to engage a retrieving tool.
The methods for running the production. tubing and
latch-ing onto the subsurface safety valve or for position
ing the subsurface safety valve in the well tubing and for
retrieving them therefrom also are part of the invention.
Primary objects of the present invention are to provide
an improved production tube for use with subsurface
duit when the velocity of the fluids ñowing through the
safety valves and methods for installing the production
valves reaches a predetermined value. These velocity 25 tubing in and retrieving the production tubing from the
type valves are disadvantageous in that they cannot be
periodically tested without iiowing the well at a high rate
This and other objects of the invention will be more
for a short period of time to cause closure of the valve.
apparent from the following more detailed description of
Other type safety valves, lsuch as the ones disclosed in
the invention, which is given in conjunction with the
U.S. Patents Nos. 2,786,535, 2,798,561, 2,812,822, and 30 drawings wherein:
2,813,588, employ an external fluid pressure originating
FIG. l is a vertical partly-sectional View of a wellhead
at the earth’s surface to maintain the valves open and
depend upon release of this tiu-id pressure to cause the
apparatus provided with a master valve and including a
tubing suspended therefrom and a lubricator mounted
valves to automatically close.
thereon in which is arranged the collapsed production
One safety valve of this latter type, which is disclosed 35 tube and a running tool connected to it;
and claimed in US, patent applications Serial Nos.
FIG. 2 is a vertical, partly-sectional view of the well
808,429 and 808,430, entitled “Subsurface Valve” and
head, lubricator, and tubing of FIG. l showing the ele
“Subsurface Safety Valve,” respectively, by Harry Pistole
ments of the production tube and running tool in greater
et al., utilizes a tubular conduit for carrying production
detail and in a different position;
iiuids to the surface. In addition to providing a flow 40
FIG. 3 is a View simi-lar to that shown in FIG. 2 show
path for the well fluids from the safety valve to the sur
ing the production tube extended and in set, operating
face, the production tube serves the purpose of creating a
pressure type annulus between the pipe in which the
FIG. 4 is a view similar to that shown in FIG. 2 show
safety valve is installed and the production tube, which
ing the retrieving tool and the production tube in one
is useful for testing the operation of the safety valve with 45 position; and
out removing the valve from the well. The flow path
FIG. 5 is a view similar to that shown in FIG. 2 show
provided by the production tubing preferably is of sub
stantíally constant cross-sectional area throughout its
length. This feature is important, since it prevents the
accumulation of sand carried by the production fluids.
Since the production ñuids from many wells contain free
sand, accumulation of this sand along any part of the
iiow path presents a problem.
It is desirable to install the subsurface safety valve and
the production- tube used with it either together or sep
arately without killing the well; i.e., while the well is
under pressure. However, the placement depth for the
safety valve requires in many instances a production
tube which is so long that the use of a lubricator is out
ing the retrieving tool and production »tube in another
In the iigures is `shown a wellhead generally designated
i0, from which is suspended a casing 1l and a pipe or
tubing 12, to the upper end of which is connected a
lubrioator 1‘3. As seen in FIG. 1, the lubricator is pro
vided with a stuñing boX 1‘4 »at its upper end and a blow
out preventer 1S, shown in closed position, adjacent the
lower end thereof. A -telescoping production tube 16,
to which is connected a running tool i7, is suspended in
lubricator 1-3 on a wire line 18. Wellhead 10i is provided
with a production flow cond-uit 19, a safety valve control
fluid pressure conduit 2t), a master valve 21, and a pipe
of the question.
60 hanger 22, from which casing 11 and `tub-ing 12 are
The present invention provides a telescoping production
tube which, when collapsed, is sufficiently short in length
(even when the safety valve is attached thereto) to be
contained within a short length lubricator. The manner
of setting and of retrieving the production tube with or
As -seen in FIG. 2, the upper end y25 of a safety valve
2‘6 forms a retiievable head. Also, »the upper end is in
dented as ‘at 27 to form part of a ‘latch recess for the
lower pronged end portion 2S of the lowermost section
29 of telescoping production tube 16. The outer surface
of this lowermost section adjacent the end thereof is pro
vided with a seal 30 and also adjacent the lower end an
internal shoulder 31 is formed thereon. The enlarged
upper end 34 of the lower section 29 is provided with a
seal 3l2 for sealing olf the -space between -this end of the
section and the inner wall of an outer telescoping sec
tion 3‘3, and it forms a shoulder 35, which engages a
lower shoulder 36 formed on »the lower end of section
33, which serves to provide a stop between the telescop
ing sections in their extended positions. 'Fhe inner wall
ning tool 45 then is retrieved by pulling up on wire line
18, which disengages fingers 50 from recess 40 in the
process. The running tool is raised until the lower end
thereof is above blowout preventer 15.
IBlowout pre~
venter 15 then is closed, and the well is produced through
the safety valve, the extending production tube 16, and
flow conduit 19. The valve is maintained open by pro
viding fluid pressure to the annulus between the produc
tion »tubing and tubing 12 through safety valve control
conduit 20.
When it is desired to retrieve the production tubing
at the upper end of section 29 is recessed as at 40. -The
(or production tubing and safety valve), pulling tool 6i)
outer wall of section 33 is provided with seals 41 for clos
ing oit the space between .the inner wellhead wall vand
the outer surface of section 33. Above seals 41 on sec«
is y'arranged in lubricator 13, and stuiñng box 14 is con-
tion 33 are arranged a plurality of dogs 42 retained on
until arms 62 engage retrieving neck `53 of production
tube 16. Upward jarring on pulling tool 6€) releases dogs
section 33 by a dog retainer 43. An expander sleeve and
retrieving neck 53 is releasably connected to section 33
nected to the upper end thereof.
Blowout preventer 15
is opened, and `the pulling tool is lowered on wire line 18
42 `from recess 51 as seen in FIG. 4. Then, downward
jarring on tool 60 causes :shear pin 63 to sever, which
above dogs 42 by means o-f a shear pin 44. Wire line tool
17, which includes a stem 45, jars 46, and hanger as 20 releases the pulling «tool from connection with retrieving
collar 61. Pulling tool 60 then is lowered through the
sembly 47, is connec-ted to a collar 43 by means oil shear
production tube until prongs y64 engage the lower side
of shoulder 31 of section 29. Pulling tool 60 then is
fingers 50, the lower ends of which are enlarged to re
pulled upwardly by wire line 18 carrying with it lower
leasably lodge in recess `40 of section 29. The interior
wall of wellhea‘d 10 is recessed as at 51 to receive dogs w Ul section 29, the latch members 28 of which disengage
from recess 27. When the upper end of lower section 219
42 upon expansion thereof, which »occurs upon down
engages shoulder 154 on upper .section 33 as seen in FIG.
ward movement of dogs 42 on and relative to the upper
5, continued upward pull on wire line 18 raises the col
tapered surface 5‘2 of section 36.
lapsed tube until it is positioned within lubricator 13,
ln FIGS. 4 and 5 is shown a pul-ling tool 60, which in
cludes a stem and jars similar to the stem and jars of 30 after which blowout preventer 15 is closed.
pin 49. The hanger assembly 47 includes a plurality of
running ltool 17. A retrieving collar ‘61 provided with
arms 62 adapted to engage retrieving neck 53 is connected
to pulling tool `6&9 by shear pin `63. The lower end of
pulling ltool 6@ is provided with a plurality of prongs 64,
which are designed to engage the interior shoulder 3‘1
of section 219.
When it is desired to install a safety valve in a well
under pressure, the safety v‘alve 26 is run on ‘a wire line
Instead of setting the production tubing above the mas
ter valve as described and shown, it may be desired to
set it below the master valve in order »to prevent block
ing of the action of the master Vvalve while the safety
valve and production tubing are installed in the well.
In this ‘alternative arrangement, the recess available in
many commercial wellheads could be used to hang the
production tubing, and these wellheads could be altered
to provide for the connection of a safety valve control
and set at a desired depth. Although in the description
of the invention the safety valve is run, set, and retrieved 40 line »beneath the mas-ter valve.
separately from running, setting, and retrieving of the
production tubing, it is possible and the invention is in
tended to encompass initially connecting the lower end
of the telescoping production tube to the upper end of the
.Having fully described the nature, objects, apparatus,
and operation of our invention, we claim:
1. Production fluid apparatus for use with a subsur
face safety valve which is located in a well pipe sus
safety valve and running, setting, and retrieving them 45 pended from a wellhead and adapted to be positioned in
Whether or not they are run together or separately,
lubricator 13 is connected to the upper end of wellhead
10, blowout preventer 1‘5 is closed, and telescoping pro
said well pipe on a wire line setting tool and to be re
trieved from said well pipe by `a wire line pulling tool
comprising »an open-ended production tubing having a
plurality of vertically extendible, retractable, telescoping
duction tube 16 ‘and running tool 45, connected -to and 50 sections adapted to form when extended in said well pipe
an isolated production fluid flow path ‘between said sub
suspended on wire line 18, is positioned in lubricator 13.
surface safety valve and said wellhead; latching means
The stuñing box 14 then is positioned on the upper end
arranged on the lower end of the lowermost of said tele
of lubiicator 13 as seen in FIG. l.
Blowout preventer 15 is opened, and the production
scoping sections adapted to engage said subsurface safety
tube and running tool are lowered through master valve 55 valve; anchoring means arranged on the upper portion
of the uppermost of said telescoping sections adapted to
21 as seen in FIG. 2. When dogs «42 are adjacent recess
releasably anchor said production tubing in said well
51 in wellhe-ad 10, the running tool is jarred until shear
head; means arranged on the upper end of said upper
pin 44 shears, which releases the connection between the
most section adapted to seal off the annulus between said
expander sleeve and retrieving neck 43 and the upper sec
tion 33 of the »telescoping tube. Dogs 4Z lodge in recess 60 production tubing and the inner wall of said wellhead;
means arranged on the upper end of said lowermost sec
51 in wellhead 1t) by lowering of the running tool, and
tion adapted to releasably engage said setting «tool for
seals 41 seal off the space between the interior wall of
initially retaining said production tubing in retracted
wellhead 10 and the upper telescoping section 33 of the
position; and means arranged on the lower end of said
the production tube in Wellhead 10 and seals oli the space 65 lowermost section adapted to engage said pulling tool.
2. Production iluid apparatus for use with a subsur
between the wellhead 10 and the production tube. Addi
face safety valve which is located in a well pipe suspended
tional jarring of the running tool severs shear pin 49 in
from a wellhead and adapted to be positioned in said
collar 48 and releases the running tool from its connect-ion
with production tube 16. Then, the running `tool and
well pipe on a wire line setting tool and to be retrieved
the lower telescoping section 29 are lowered until prongs 70 from said well pipe by a wire line pulling tool comprising:
28 lodge in recess 27 of safety valve 26.
an open-ended production tubing having a plurality of
Seals 30 seal olf the space between -the interior wall
vertically extendible, retractable -telescoping sections
of safety valve 26 and the outer surface of section 29;
adapted to form when extended in said well pipe an
Shoulders 36 of section 33 and 35 of section 2.9 prevent
isolated production fluid flow path between `said sub
further downward movement of lower section 29. Run 75
production tube as seen in FIG. 2. This action anchors
surface safety valve and said wellhea‘d;
latching means arranged on the lowermost of said
Itelescctping sections adapted to engage said sub
surface safety valve;
means arranged on said ftelescoping sections adapted 5
to releasably anchor said production tubing in said
means arranged on the lowermost telescoping section
sealing means arranged between said wellhead and
said production tubing for `sealing off the space
References Cited in the file of this patent
2,05 6,543
initially retaining said production tubing in retracted 10 2,766,831
means arranged on said lowermost section adapted to
engage said pulling tool; and
adapted Ito releasably engage said setting tool for
Tschappat ____________ __ Oct. 6, 1936
Brown _____________ _.. Aug. 20, 1940
Otis _________________ __ Oct. 16, 1956
En Dean et al _________ __ Apr. 22, 1958
Russell et al __________ __ Sept. 29, 1959
Sizer _________________ __ Dec. 6, 1960
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