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Патент USA US2121230

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J‘une21,1938.
'
‘
.
w. M. HAMON
‘
2,121,230
LOCKING MEANS
Filed July 9. 1935
F" .2,
mam»
ATTORNEY.
'
'
2,121,230
Patented June 21, 1938
UNITED STATES PATENT OFFICE
1
"
‘
‘
2,121,230
:
,
.
‘
LOCKING MEANS >
Weslie M. Hamon‘, Bell, ‘Calif. ‘
Application July 9, 1935, Serial No. 30,513
.I.‘
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'
“
'
11 Claims.
This invention is a locking means particularly
ly' in axial section.
particularly applicable to ?shing tools.
Fig. 6 ‘is a transverse section on} the line 6--6‘
of Fig. 5.
The locking means is illustrated embodied in
a ?shing tool, in which embodiment the inven
tion includes Fa mandrel I suspended from a
casing 2 which may be in turn suspended by a
‘ It is an object of the invention to provide a‘
longitudinally displacedy’so as to lock in a co
operating socket, with‘the slips preferably adapt
ed for release or operative engagement by rela
tive rotation of a well string from which the
1'0: slips are suspended, and with the slips preferably
adapted for rotation with the well string at the
will of the operator.
’
I
It is a further object ‘of the invention to pro
vide a ?shing tool embodying such a slip con-‘
15: struction, with the slips suspended from a tool
string and adapted for reception in the bore of a
wellstring which has been lost‘in a well, and with
the slips adapted for relative longitudinal dis
placement so asto operatively engage and tightly
2‘0 bind in the bore of ‘the “?sh”.
It is a still further object of the invention to
adapt the normally inoperative slips for rotation
with the tool string in order that the slips may
make‘threaded engagement with a usual thread
25 ed box at the upper end of the “?sh”, and at the
will of the operator to rotate the‘ tool string rel
ative to the slips in ‘the opposite direction to'that
of‘ their threaded engagement, with ‘said reverse
‘ rotation relatively longitudinally displacing‘ the
30 slips so' as to tightly bind and lock their threaded
engagement, andlwithcontinued rotation of the
tool string in said reverse direction then rotat
ing the locked slips in the same reverse direction
and thereby similarly reversely rotating the.
35 “?sh” which is suspended from the threadedbox
in which the slips are locked. A length of the
“?sh” may'thus be backed o? at one of its lower
threaded joints, and the released section of ‘the
“?sh” may then be withdrawn and the operation
40 repeated until the entire length of the lost well
string has been recovered.
‘
o
‘
M
Further objects of‘ the invention will be read
ily understood from the following description of
the accompanying drawing; in which:
Fig. l is a side elevation of a ?shing tool em
bodying the invention, partly in axial section and
showing its slips received ‘l within a threaded boxv
of a lost well string.
50
‘
Fig. 2 is a similar view showing the slips rela
tively longitudinally displaced so as to tightly
bind and lock‘ inthe threaded box.
'
Figs. 3 and 4 are transverse sections on the
55,
from their supporting mandrel and shown part
applicable as a joint‘for well strings, and ‘more
5 lock embodying‘ slipsadapted to 'be relatively
45
(01. 294-876)‘
lines 3-3 and 4-4 oiFig. 1 respectively.
‘Fig. .5 is a side. elevation.‘ of .the slips, removed
‘
'
sub 3 from a usual tool string 4, with cooperating ‘
slips 5-43“ mounted on the lower end of the man- 16
drel and adapted for reception in the bore of ‘a
“?sh”, preferably‘in a usual tapering threaded
box 6 at the upper end of the “?sh”.
Means are provided whereby the slips may be
rotated with the tool string 4 for screwing the 15:
cooperating slips into the threaded box of the ‘
“?sh”, and at the will of the operator the tool
string‘ may then be turned in the opposite direc
tion without“ unscrewing the slips from the box,
with said reverse rotation of the tool string rela
tively longitudinally displacing the cooperating
slips so as to bind and lock them in the threaded
box. Bycontinued reverse rotation‘of the‘tool
string 4 the “?sh” may thus be backed o? at
one of its lower threaded joints and the discon 25
nected length of the “fish” maythus be recov
ered from the well.
'
‘ As an instance of this arrangement the slips
5—§5? comprise cooperating arcuate slips adapted
for assembly so as to de?ne a diametrically split 30'
annulus having a tapered lower end correspond
ing to the taper of box 6 and adapted to be se
cured in said box, as for example by threading
the lower ends of the slips as shown at 8, where
by the slips when operatively assembled in nor- 35
mal transverse alinement provide a continuous
thread which is adapted to be screwed into the
box 6. The cooperating slips de?ne a bore 9-41
which-opens into an enlarged bore Ill-Illa, and
from the bore Ill-4!)a a restricted bore ll‘-l la 40
preferably opens through the lower ends of the
slips. The mandrel l upon which the slips are
mounted has a cylindrical lower end la received
in the bore 9—9*1 and terminating in a cylindri
cal enlargement H! which is received in the .en- 45
larged bore lll-L-lll?. The lower ends of‘the slips
may have a dovetail engagement l3---l3a guid
ing their relative longitudinal displacement, and
when the tool is assembled the casing 2 telescopes
over the upper ends ‘Ill-44a of the assembled 50
slips so as to cooperate with the dovetail en
gagement .I>3---l32L for preventing relative radial
displacement of the slips. The slips are thus held
against longitudinal‘ displacement from the man
drel l‘by the enlargement I2 which is received 55“
2
2,121,230
in bore Iii-I0“, but the cooperating slips are
adapted for free rotation on the mandrel.
The mandrel I is adapted for rotation with
the casing 2 while permitting relative longitudi
nal displacement of these elements so as to pro
gitudinally displace the slip 5& relative to the slip
vide a telescopic engagement; and for this pur
pose the mandrel has an intermediate non-circu
are thus moved slightly out of alinement so as to
lar portion I5 which is adapted for sliding recep
10 the casing 2.
The telescopic engagement be
tween the mandrel and the casing ‘is normally
yieldably contracted as shown at Fig. 1, but is
adapted for expansion responsive to strain ex
erted on the casing 2 While the slips 5—5a are se
15 cured in the threaded box 6. A spring I'I nor
mally contracts the telescopic engagement; and
for this purpose a sleeve I8 may be threaded onto
the upper end of the mandrel which projects into
an enlarged bore I9 of the casing 2, with the
20 spring H, which is a coil spring, encircling the
sleeve and received in the bore I9 with the ends
of the spring respectively engaging. an abutment
shoulder‘ZO‘of the bore I9 and an abutment
shoulder 2| of the sleeve I8.
;When the telescopic engagement is contracted
the slips 5-5a are adapted for rotation with the
casing 2, and when the telescopic engagement
is expanded against the tension of spring H the
casing 2 is free to rotate relative, to the slips.
As an instance of this arrangement a ?ange 23 is
30
gaged, and by turning the casing 2 in the opposite
direction, as indicated by arrow B, the cam sur
face 33 rides along the cam surface 3I so as to lon
tion in a corresponding non-circular bore I6 01'
25
6, the cooperating abutments 24—25 are disen
5 as shown at Fig. 2.
The threads 8 of the slips
wedge and tightly bind the tapering threaded
engagement between the slips and the threaded
box 6.
The slips are thus locked against un
ment tightened the more the casing 2 is re
versely rotated, and when the locking engage
ment has been tightened so that the slips can
be no further relatively longitudinally displaced, 15
the reverse rotation of casing 2 binds the cooper
ating cam surfaces 3I—33 against one another.
Continued reverse rotation of the casing thereby
turns the slips with the casing, with the slips still
tightly locked in the box 6. The box 6 and the 20
lost well string which is suspended therefrom are
thus rotated in the direction of arrow B for un
screwing the “?sh” at one of its lower threaded
joints which are all threaded in the same direc
tion as that of its upper threaded box 6.
25
In order to permit the necessary relative lon
gitudinal displacement of the slips when making
the locking connection, the bore III‘a of slip 5a
is preferably slightly longer than the cooperating
enlargement I2 of the mandrel, while the bore II) 30
' provided on the slips above their lower threaded
of slip 5 is of a length to snugly receive the en
ends,,and this ?ange is longitudinally recessed .as
shown at 24, with these recesses adapted to re
ceive cooperating lugs 25 at the lower end of the
casing 2 when the telescopic engagement between
thecasing and the mandrel is contracted. The
cooperating abutments 24—25 thus cause the slips
tor-normally rotate with the casing, but by re
tracting the casing relative to the mandrel the
largement I2; and in order to normally trans
versely aline the cooperating slips irrespective of
this provision for slight longitudinal play of the
3.5.
lugs 25 are withdrawn from the recesses 24 so that
" the casing 2 may be freely turned relative to the
slips as shown at Fig. 2.
The casing is rotated relative to the slipsln
the opposite direction to that of the threaded
45. engagement between the slips and the box 6, and
this relative rotation of the casing is adapted to
relatively longitudinally displace the slips so as to
tightly bind and lock the threaded engagement
which they make with the box. As an instance of
this arrangement, one of the slips, shown as the
slip 5, has a ?at abutment surface 30 at its upper
end, while the upper end of the other slips 5EL
formsa cam abutment surface 3I ; and the bore
of casing 2 in which the upper ends of the slips
55 are journaled, forms an abutment surface which
cooperates with the abutment surfaces 30--3I,
and which throughout one-half of its circumfer
ence is a flat abutment surface 32, while through
out the other half of its circumference it forms a
60 cam abutment surface 33.
When the tool is in normal position with the
spring I ‘I retracting the mandrel I within the cas
slip 53 on the enlargement I2, a spring 35 may be 35
mounted in a bore which is formed by cooperat
ing recesses 36-46a in the meeting faces of slips
5—5*‘. The ends of the spring normally engage
abutment shoulders formed by the ends of the
recesses 36----3(i2L as shown at Fig. 5, but when the 40
slip 5a is longitudinally displaced relative to the
slip 5 the spring 35 is compressed between the
lower abutment shoulder of recess 36 and the
upper abutment shoulder of recess 36*‘ so as to
permit relative longitudinal movement of the 45
slips. The tension of the compressed spring
then returns the slips to their normal transverse
ly alined position as shown at Figs. 1 and 5, when
the stress exerted at the cooperating cam sur
faces 3I—33 is relieved by turning the casing 2 1
back to its normal position .as shown at Fig. l.
The tool string 4 from which the casing 2 is
suspended provides for turning the casing so as
to engage or release the locking means, and for
this purpose the sub 3 is threaded into the upper .
end of the casing 2 as shown at 40, and the sub
3 is in turn suspended from the tool string 4 by
a threaded connection 4|.
The threaded con
nections 40 and M, as Well as all of the threaded
connections along the length of the tool string
4, are threaded in the opposite direction to that
of the box 6 and the other threaded joints of
ing 2, the abutment surfaces 3ll—32 and 3I_33
the “fish”.
longitudinally aline and engage as shown at Fig.
lost well string which has right-hand threads,
65 1, and the slips 5—-5a are then transversely alined
so that their thread 8 is a continuous thread
slips 5-5“ are employed which have a right-hand
thread, but the ?shing tool is suspended from a
tool string 4 which has left-hand threads. Con
versely if the lost well string has left-hand thread
joints, the slips which are employed have a left
adapted to be screwed into the box 6 when the
slips are initially turned with the casing respon
sive to the engagement of abutments 24-25, the
70 direction of rotation being shown at arrow A.
10
screwing from the box 6 with this locking engage
In other words,‘ when ?shing for a
hand thread and are run in on a tool string which 70
When the telescopic engagement between the ‘has right-hand threads.
casing and the mandrel is then expanded by
Circulation is preferably provided through the
elevating the casing relative to the slips which locking connection, and for this purpose the
are held against both longitudinal and rotary dis
mandrel I may have a bore 45 opening there
75: placement. by their threaded-engagement in box through with a wash pipe 46 projecting upwardly
2,121,230
from the mandrel and threaded into the :end of
the bore. A wash pipe 41 is also suspended from
the enlargement l2 at thelower end of. the man
drel and is threaded into the lower, end of‘ the
bore 45 and is received in the restricted bore
Il—l la which is formed by the assembled slips.
The wash pipe 46 extends through a bore 48 in
the sub 3 so as to communicate with the bore .of
the tool string ll, and the wash pipe may be,
10 packed off relative to the sub 3 by a usual pack
ing gland 49. The wash pipe 41 projects below
the cooperating s1ips,5—,-5a and opens‘ into the
bore of the threaded box 6 for communication
with the bore of the lost well string.
15
.
In operation, if a well string has been lost in
a well the ?shing tool is run in on atool string
Ill, and with the lugs 25 seated in recesses 24‘the
tool string is rotated in the direction of arrow A
so as to screw the slips 5—-5=* into the box 6 at
20 the upper end of the “?sh” as shown at Fig. 1.
When threaded connection has been made the
tool string ll is elevated so as to disengage the
lugs 25 from the recesses 24, and the tool string
4 is then rotated in the opposite direction as
25 shown by arrow B, thereby locking the threaded
connection between the slips and the box 6. Con
tinued reverse rotation of the tool string thus
breaks some one of the threaded joints of the
“?sh” below its upper box 6, whereupon the tool
30 string and the disconnected length of the “?sh”
which is suspended from the tool string, may be
Withdrawn from the Welland the operation then
repeated until the entire “?sh” has been re
covered.
After the locking connection has been made it
35
may be released at any time by turning the tool
string in the direction of arrow A, thereby reliev
ing the stress exerted against the slip 5‘1 at the
cooperating cam surfaces 3 I—33, so that the slips
40 are again transversely alined by the spring 35,
and the lugs 25 of the casing 2 may then be re
enga'ged with the recesses 24 to permit the slips
being rotated with the tool string in the direc
tion to unscrew the slips from the box 6.
45
The invention thus provides. a locking connec
tion particularly adapted for embodiment in a
?shing tool but applicable‘wherever such a lock
ing connection is desired between lengths of a
well string or the like, with the locking connec
50 tion made by relatively longitudinally displacing
cooperating slips so as to tightly bind them in a
cooperating socket, and the slips adapted for rela
tive longitudinal displacement by relative rota
tion of that portion of a well string or the like
55 from which the slips are suspended, and with said
portion of the well string adapted to rotate the
slips with said portion of the string or to turn
said portion of the string relative to the slips at
the will of the operator.
While the invention has been illustrated with
60
slips having threaded engagement with a com
plemental threaded socket, with relative longitu
dinal displacement of the slips binding and look
ing the threaded engagement, the invention con
65 templates engagement between the
slips and
socket locked by relative longitudinal displace
ment of the slips, without limitation of said lock
ing engagement being a threaded engagement,
but with the invention of a scope as set forth
70 in the following claims.
I claim:
1. In combination, a support, slips journaled
on the support, a driving connection operable for
selectively rotating the slips with the support or
75 permitting the support to rotate relative to the
slips, and means operable‘responsive to rotation
of the support relative to the slips for relatively
longitudinally displacing the slips, the slips hav-
ing surfaces adapted for binding engagement in
av cooperating socket responsive to their relative
longitudinal displacement.
.
‘
.
"
2. In combination, a support, a mandrel ‘sus
pended from the support, slips journaled on the
mandrel and adapted for limited relative longi
tudinal displacement, and means operable r‘e-e 10
sponsive to rotation‘ of the support relative to the
slips for longitudinally ‘displacing the slips rela
tive to one another, said relative longitudinal
displacement of the slips operatively positioning
the slips.
‘
15
.
3. In combination, a‘support, a mandrel sus
pended from the support, slips journaled on the
mandrel and adapted for limited relative longi
tudinal displacement, a driving connection oper
able for selectively rotating the slips with the 20
support or permitting the support to rotate rela
tive to the slips, and means operable responsive
to rotation of the support relative to the slips for
relatively longitudinally displacing the slips, the
slips having surfaces adapted for binding engage 25
ment in a cooperating socket responsive to their
relative longitudinal displacement.
4. In combination, a support, slips journaled
on the support, one of the slips being ?xed against
longitudinal displacement relative to the sup 30
port, another of the slips being adapted for lim
ited longitudinal displacement on the support,
and cooperating cams on the support and on the
second mentioned slip adapted for engagement
responsive to rotation of‘ the support relative to 35
the slips for longitudinally displacing the second
mentioned slip relative to the ?rst mentioned
slip, said relative longitudinal displacement op
eratively positioning the slips.
5. In combination, a support, slips journaled 40
on the support, one of the slips being ?xed against
longitudinal displacement relative to the sup
port, another of the slips being adapted for lim
ited longitudinal displacement on the support, a
driving connection operable for selectively rotat
ing the slips with the support or permitting the 45
support to rotate relative to the slips, and coop
erating cams on the support and on the second
mentioned slip adapted for engagement respon
sive to rotation of the support ‘relative to the slips
for longitudinally displacing the second men 50
tioned slip relative to the ?rst mentioned slip,
said relative longitudinal displacement of the slips
operatively positioning said slips.
6. In combination, a support, a slip journaled
on the sup-port, a driving connection operable
for selectively rotating the slip with the support
or permitting the support to rotate relative to
the slip, and means operable‘ responsive to rota
tion of the support relative to the slip for longi
tudinally displacing the slip, said longitudinal
displacement of the slip operatively positioning
the slip.
7. In combination, a support, a slip journaled
on the support, ,a driving connection operable for
selectively rotating the slip with the support or 65
permitting the support to rotate relative to the
slip, and means operable responsive to rotation
of the support relative to the slip for longitudinal
ly displacing the slip, the slip having a surface 70
providing a locking engagement responsive to
said longitudinal displacement of the slip.
'
8. In combination, a support, a slip journaled
on the support, a driving connection operable for
selectively rotating the slip with the support or 75
4
2,121,230
permitting the support to rotate relative to the
slip, and means operable responsive to rotation
of the support relative to the slip for longitudi
nally displacing the slip, the slip having a surface
adapted for binding engagement in a cooperating
socket responsive to said longitudinal displace
ment of the slip.
9. In combination, a support, slips carried by
the support, means for yieldingly transversely
10 alinin‘g the slips, the slips when transversely
alined being in non-binding relation with a co
the slips are transversely alined are adapted for
threaded engagement with a thread of a co
operating element, at least one of the slips being
journaled on the support, and means operable
responsive to rotation of the support relative to
said one of the slips for relatively longitudinally
displacing the slips for binding engagement of
their threads with the thread of the cooperating
element.
'
11. In combination, a support, a slip journaled
on the support, the slip having a thread adapted
operating element, at least one of the slips being
for threaded engagement with a thread of a co
journaled on the support, and means operable re
operating element, a driving connection operable
for selectively rotating the slip with the support
sponsive to rotation of the support relative to
15 said one of the slips for longitudinally displac
ing the slips relative to one another, said relative
longitudinal displacement of the slips positioning
the same for binding engagement with said co
operating element.
10. In combination, a support, slips carried by
20
the support, the slips having threads which when
or permitting the support to rotate relative to the 15
slip, and means operable responsive to rotation
of the support relative to the slip for longitudi
nally displacing the slip for binding engagement
of its thread with the thread of the cooperating
element.
WESLIE M. HAMON.
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