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Патент USA US3051262

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Aug. 28, 1962
J. MOCLINTON
3,051,254
DEVICE FOR RECOVERING PIPE FROM WELLS
Filed July 21, 1958
2 Sheets-Sheet 1
John Ma‘ (‘/10 for?
INVENTOR
BY
/
F/
.
'
I
ATTORNEY
Aug. 28, 1962
J. MCCLINTON
3,051,254
DEVICE FOR RECOVERING PIPE FROM WELLS
Filed July 21, 1958
2 Sheets-Sheet 2
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INVENTOR.
BY
{c6
ATTORNEY
United States Patent Office
1
3,051,254
DEVICE FOR RECOVERING PIPE FROM WELLS
John McClinton, 8603 Glenaire, Houston, Tex.
Filed July 21, 1958, Ser. No. 749,833
4 Claims. (c1. 175_2s7)
3,?5l,254
Patented Aug. 28, 1962
2.
FIGURE 2B is a fragmentary, vertical, central, cross
sectional view showing the lower portion of the tool of
the invention as illustrated in FIGURE 1, FIGURE 2B
being a downward extension of FIGURE 2A; and
FIGURE 3 is a cross-sectional view, taken along the
line 3—3 of FIGURE 2A, looking in the direction in
dicated by the arrows.
Referring now to the ‘drawings in greater detail, the in
Wention is illustrated herein in connection with its use in
which is designed to be readily connected to a pipe which is
‘laterally displaced or eccentrically positioned in a well 10 wells, such as the well W, shown in FIGURE 1, in which
a lost object, such as the drill pipe or tubing T is located
bore.
which is to be recovered from the well.
The invention ?nds particular application in connec
In the carrying out of operations of this kind a ?shing
tion with drilling and production of oil and gas Wells
tool of suitable type is customarily employed, which is
for the recovery of disconnected or lost pipe, such as
drill pipe or tubing in such wells.
15 lowered in the well bore attached to a tubular operating
string and connected to the upper end of the lost object
In the drilling and production of oil ‘and gas wells, the
so that the object may be removed from the bore with
bores of such wells usually deviate somewhat from the
the string. It frequently happens, however, that due
vertical and at times are curved throughout substantial
to curvature of the bore, cavitation of the formation, or
portions of the depth of the well. Laterally widened por
tions are also frequently formed in the bores of such 20 other irregularity, so that the ?shing tool cannot be
brought into axial alignment with the object and is thus
wells due to cavitation or washing away of relatively
prevented from being connected to the object.
soft portions of the formation, so that upon disconnection
It is for the purpose of overcoming the dif?culty of con
or breaking of the drill pipe or tubing in the bore the
necting a ?shing tool to a lost object in a well bore when
upper end of the portion of the pipe which remains in the
‘well is laterally displaced from the center of the bore 25 the object and tool are out of axial ‘alignment, that the
present invention has been designed.
beneath some portion of the formation which extends
The invention comprises a tubular sub or connector
laterally over said upper end. Under these conditions the
member 10, having ‘at its upper end an internally threaded
recovery of the lost pipe by the use of ?shing apparatus
This invention relates to ?shing tools, and more par
ticularly to apparatus for recovering pipe from wells and
of conventional design becomes extremely di?icult, if
box portion 12 adapted to be threadably connected to
not impossible, due to the position of the upper end of 30 the externally threaded pin portion 14 on the lower end
of a jar or other suitable device 16 attached to the lower
the pipe beneath the overlying formation which prevents
the insertion of the ?shing tool.
The present invention has for an important object the
provision of a ?shing tool for recovering lost objects from
end of an operating string 18 for rotation with the string.
The lower end of the sub 10 is provided with an ex
ternally threaded pin 21) or other suitable means, such as
a well bore including means for centering the tool rela 35 a grapple, whereby the sub may be connected to the lost
object T to connect the same to the string.
tive to the object in the well bore.
The lower end of the sub 10 is also internally threaded,
Another object of the invention is to provide a ?sh
as indicated at 22, for the attachment thereto of a tu
ing tool adapted to be lowered into a well bore and em
bodying means for positioning the tool in the bore for
bular guide element or stinger 24, of reduced external
engagement with a lost pipe therein to connect the lost 40 diameter, whose lower end is for-med with a point 26,
pipe to the string.
formed by cutting off the lower end of the guide member
A further object of the invention is the provision of
at a sharp ‘angle, as indicated at 28 in FIGURE 23. The
a device for recovering lost objects from well bores com
pointed portion of the stinger or guide member may be
prising a ?shing tool adapted to be lowered into a well
reinforced by an internal plate 30, welded or otherwise
bore on a string of pipe and including means for ad 45 secured thereto.
justing the position of the tool laterally in the bore to
A lateral discharge port 32 is provided in the guide
position the tool for engagement with a lost object there
member 24, formed by a tubular insert 34, which may
in to connect the tool to the object.
be of hardened material and which is inserted ‘through a
Another object of the invention is to provide a tool
lateral opening in the wall of the stinger and welded
of the character mentioned including pressure ?uid op 50 thereto as indicated at 36 in FIGURE 2B.
erable means for adjusting the position of the tool laterally
Beneath the discharge outlet 32 the stinger is provided
in the well bore to position the tool to be engaged with
with an internal ori?ce plate 38 having a central re
a lost object to connect the object to the tool.
stricted opening 40 therethrough, and secured in place in
A further object of the invention is the provision of
‘any convenient manner ‘as by means of set screws 42, in
a tool of the kind referred to having guide means thereon 55 the wall of the stinger and whose inner ends extend into
adapted to be inserted in the upper end of a lost pipe
suitable recesses in the plate. A seal forming element 44,
in a well bore to guide the tool into the pipe and in
formed of rubber or the like is seated on the upper sur
cluding means for adjusting the position of the tool later
face of the upper plate 38 in position to form a seal be
ally in the bore to position the guide means to enter
tween the ori?ce plate and the inner face of the wall of
the pipe.
60 the stinger, and having a central opening 46 therethrough.
The above and other important objects and advantages
The sub 10 may be provided with a lateral discharge
of the invention may best be understood from the follow
opening 56 in its lower externally threaded end portion,
ing detailed description constituting a speci?cation of the
and a lateral discharge opening 48 located above said ex
same when considered in conjunction with the annexed
ternally threaded lower end portion, which openings are
drawings, Wherein——
65 formed by inserts 5‘2 and 54, similar to the insert 34 of
FIGURE 1 is a fragmentary side elevational view, on
the opening 32. and which may be formed of hardened,
a reduced scale, illustrating a preferred embodiment of
wear resisting material, inserted in lateral openings in the
the invention and showing the same in a well bore in
sub and secured thereto, as by means of welding or other
position to be engaged with a lost object in the bore;
wise. The opening 48 may be internally threaded at its
FIGURE 2A is a fragmentary, vertical, central, cross 70 outer end, as indicated at 56 to receive a screw plug 58,
sectional view showing the upper portion of the tool of
by which this opening may be closed if desired.
the invention as illustrated in FIGURE 1;
The sub 10 may, if desired, be provided with one or
3,051,254
3
4
more external cutter blades 60, positioned to enable the
tool to be operated to perform a reaming action upon ro
tation of the operating string, which blade or blades may
be attached to the body of the sub by welding as shown
tion, what is claimed vas new and desired to secure by
Letters Patent is:
.1. In a device for recovering pipe ‘from wells, the com
bination with a tubular body adapted to be connected at
its upper end to a tubular operating string for lowering
with the string in a well bore, tubular guide means on
the body shaped for engagement with the upper end of a
at 62 in FIGURE 3, or by other suitable means.
The
blades 60 preferably do not project radially outwardly
beyond the external periphery of the lost object T, so that
pipe located in the bore to guide the body into a position
when the object includes drill collars used ‘on a drill stem,
in longitudinal alignment with the pipe, said body and
a wash-over operation can be readily carried out without
interference by the reamer blades to recover the drill 10 guide means having outlets positioned to discharge ?uid
under pressure from the interior of the body and guide
means in the same direction toward the surrounding wall
be desirable.
of the bore, means in the guide means located below the
In making use of the ?shing tool apparatus of the in
outlet in the guide means for restricing the downward
vention, constructed as described above, the sub 10 and
stinger 24 are assembled with the jar 16, ‘as illustrated 15 ?ow of ?uid through the body and guide means to cause
the ?uid discharged from said outlets to exert a lateral
in FIGURE 1, with the discharge outlets 32, 48 and 5t}
force on the body and guide means to urge the body and
directed radially in the same directions relative to the axis
guide means in a direction to position the guide means
of the tool, and attached to the lower end of the operat
to enter the pipe upon downward movement of the body
ing string 18.
The tool may then be lowered into the well with the 20 in the bore ‘and means on the body positioned for en
gagement with the pipe upon downward movement of
string and oriented therein relative to the lost object T
the body vwith the guide means in guiding engagment with
in any well known manner, so that ?uid under pressure
the pipe to connect the body to the pipe, of external cut
may be introduced into the string to be discharged
ter means on the ‘body extending radially outwardly from
laterally through the discharge outlets to move the sub
and stinger laterally in the well bore to position the 25 the body in the direction of out?ow of said ?uid from
the body, said body having an uninterrupted, external,
pointed end' of the stinger to enter the open upper end
peripheral surface extending about the body from one
of the object or tubing T to guide the tool into the tubing.
side of said cutter means to the other side thereof.
It will be apparent that because of the restricted open
2. In a device for recovering pipe from wells, the com
ing 40 of the ori?ce plate 38 the downward ?ow of ?uid
bination with a tubular body adapted to be connected
through the stinger is restricted so that ?uid will ?ow
at its upper end to a tubular operating string for lower
out of the discharge openings 32 and 50 with a jet like
ing with the string in a ‘well bore, tubular guide means
action to exert a force tending to move the sub and stinger
on the body shaped for engagement with the upper end
laterally in the well bore toward the side of the bore
of a pipe located in the bore to guide the body into a
‘against which the tubing T is resting, thus aligning the
stinger with the open end of the tubing to permit the 35 position in longitudinal alignment with the pipe, said body
and guide means having outlets positioned to discharge
stinger to enter the tubing upon further downward move
?uid under pressure from the interior of the body and
ment of the tool to guide the externally threaded pin 20
guide means in the same direction toward the surround—
into engagement with the internal threads of the upper
ing wall of the bore, means releasably positioned in the
end of the tubing T so that the sub may be connected to
guide means below the outlet in the guide means for
the tubing by rotation of the string.
restricting the downward ?ow of ?uid through the body
Upon connection of the sub to the tubing in this man—
and guide means to cause the ?uid discharged from said‘
ner the tubing may then be recovered from the well bore
outlets
to exert a lateral force on the body and guide
with the string.
means in a direction to position the guide means to enter
When the sub 10 has been connected with the tubing
T in the manner described ‘above should it be desired to 45 the pipe upon downward movement of the body in the
bore and means on the body positioned for engagement
increase the circulation of ?uid through the sub and tub
with the pipe upon downward movement of the body with
ing, then the ori?ce plate 38 may be knocked out by the
the guide means in guiding engagement with the pipe to
use of a suitable tool, such as a line supported weight
connect the body to the pipe, of a smooth external pe
or the like, to fully open the stinger to permit the unob
structed ?ow of ?uid therethrough. The reamer blade 50 ripheral surface formed on the body diametrically op
stem and collars from the well, should such operations
60 may be used to enlarge the well bore or to ream away
posite said outlets in position for engagement with the
surrounding wall and external cutter means on the body
any obstruction therein, either before the sub =10 has been
extending ‘radially outwardly therefrom opposite said
coupled to the tubing T or thereafter, as desired.
smooth
external surface.
In the event that additional lateral force is required to
\3. In a device for recovering pipe from wells, the com
move the sub and stinger laterally in the well bore to the 55
bination with a tubular body adapted to be connected at
desired extent the plug 58 may be removed to provide an
its upper end to a tubular operating string for lowering
additional jet through which ?uid under pressure may be
with the string in a well bore and having an outlet posi
discharged to increase the lateral force ‘obtainable.
tioned to discharge ?uid under pressure from the interior
'It will thus be seen that the invention, constructed and
operated in the manner described above, provides a de 60 of the body toward the surrounding wall of the bore to
urge the body in a direction to position the body in longi
vice for recovering pipe or other objects from a well
tudinal alignment with a pipe located in the bore and
bore, and which may be operated by the pressure of ?uid
means for connecting the lower end of the body to the
in the operating string to move the tool to a position
upper end of the pipe, of external cutter means on the
for connection to the lost object, and which may also be
body extending radially outwardly therefrom in the di
operated to perform a jarring action on the lost object
rection of out?ow of ?uid from said outlet, said body
to release the same from the well bore.
having a smooth external surface located diametrically
The invention has been describedaherein in connection
opposite said outlet positioned for engagement with said
with a certain speci?c embodiment of the same, but it
surrounding wall. 1
will be understood that this is intended by way of illus 70
4. In a device for recovering pipe from Wells, the com
tration-only, and that various changes can be made in
bination with a tubular body adapted to be connected at
its upper ‘end to a tubular operating string for lowering
the construction and arrangement of the various parts
with the string in a well bore, a tubular ‘guide on the
within‘the ‘spirit of the invention and the Scope of the
body shaped vfor engagement with the upper end of a pipe
appended claims.
Having thus clearly shown and described the inven 75 located in the bore to guide the body into a position in
3,051,254
6
5
longitudinal alignment ‘with the pipe, said guide having
an outlet positioned to discharge ?uid under pressure
from the interior of the
toward the surrounding wall
of the bore, a tubular liner of hardened, abrasion resist
ant material in said outlet and extending radially out
wardly beyond the external surface of the guide, a weld
deposit on the guide surrounding said liner and having
an external tapering face coextensive with the outer end
surface of the liner, means releasably positioned in the
guide below said outlet for restricting the downward ?ow 10
of t?uid through the guide to cause the ?uid discharged
from said outlet to exert a lateral force on the guide in
a direction to position the guide to enter the pipe upon
downward movement of the body with the ‘guide in guid
ing engagement with the pipe means on the body posi 15
tioned for engagement with the pipe to connect the body
to the pipe, of external cutter means on the body ex
tending radially therefrom in the direction of out?ow
of fluid from said outlet, said body having ‘a smooth
external surface located diametrically opposite said out
let positioned for engagement with said surrounding wall.
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,167,194
2,290,595
2,333,802
2,502,567
2,609,226
2,710,170
2,815,241
2,884,068
2,902,094
Anderson _____________ __ July 25,
Kinnear _____________ __ July 21,
Lowrey ______________ __ Nov. 9,
Howard ______________ __ Apr. 4,
Young ______________ ._._ Sept. 2,
Livingston et a1 _________ __ June 7,
Bundy _______________ __ Dec. 3,
Marsee ______________ __. Apr. 28,
1939
1942
1943
1950
1952
1955
1957
1959
Nelson et a1 ___________ __ Sept. 1, 1959
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