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Патент USA US2134468

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Oct. _25, 1938.
Filed Jan. 28,. 1955
. MWL(
Patented Oct. 25, 1938
` „
v Y
4Sanf'niel Ffßashara,_liouston,rv'1‘ex.
15 malins.` l(ol. 2li-_263)
pipe engaging slips of` the type‘generally used in
connection with the handling’ of pipe in 1 ell v
drilling or pumping operations.`
beingY out. away vtoishow‘the details of construc
`The invention. »relatesi'tol `an l improvement in v
Appiicatiòn Janua?yea 1935, serial Na. 3,768
:'Fig,` 2V is asectional View taken along _the plane
. 2-`,-2 VVofFig; l, andin the direction of the arrows.
`One of the _objects of the invention isto provide '
a slip having renewable jaws or‘liners, each of
Fig; B" is a front View of a removable slip jaw
formingcapart of the invention.
Fig. Ãlis a top plan’view of the jaw.v shown
` the jaws having'more than one toothed face so
that afresh face may be set to ,engage the pipe in Fig. 3.
by merely adjusting the position of‘ the slip parts.
*_Fig. 5 isa sec'tionalview'of the lower end of
Another object of the invention is to ‘provideV the slip segment seen> in jFig. 2, showing a slightly 10
'a sliphaving` renewable jaws, each of which different' form of . construction.
has a plurality of pipe engaging faces, and ‘which -
may be turned -to put ans7 ofthe different parts
Fig. 6 isa transverse sectional view takenV along '
the .planeîßi-'ß of Fig. 5, and in the direction in
dicated'by thearrows.
Another object of the invention-»iste provide
FigJl is a` View similar to Fig. 6 showing the
renewable `slip jaw` having ‘faces thereon adapted operationof 'onefeature of the invention.
to `fit diiferent sizes of pipe. _'~ ‘'
Y Fig. 8 is `a` broken* front elevation of a slip
Still another object of ‘the invention is’to pro- 'i segment illustrating a somewhat different type
rvide a reversible dovetailjawltoV give a double of construction,” but retaining.. the features of
20 `.useful lifeptothe jaw itself. .. .
the .-invention.`
Another object of theinvention islto provide a
Fig. 9 isa sectional view taken along the plane '
removable slip'jaw` which‘is adaptedV to rock 9;910f Fig. `8. ,
about :a Vertical _axis tofconform ‘_togthe contour
Fig. 10 is af sectional View taken through the
of the pipe supported, and, in -addition, -`to Vpro- . jaw of. Figs. 8 ‘and 9 showing a suggested tooth ~
25 vide'àfor‘resilient» means ¿for -holding the jaws
p in a substantialh7 aligned position when freefrom .
Thetype ofpipe engaging slip which I_have
designed'is adapted tobe seated within the usual
downwardlytapered slip bowl l2. Each slip is
provision of a >renewable backingmember for the. . made upof a plurality of segments Ill adaptedr
‘slip segments, and, when desired, for the provi' to be positionedtqlengagethe pipe or, tubing I3.
sion of'a resilient ¿cushion between‘said backing; Each segmentis‘lreoessed on its forward face to
A still‘furthe'r object of the invention is the
member and the segment itself.
receive a removable jawfor liner member 25.
A further object of theinvention is to.provide ` Said jaw isl formed .with a pluralityjof pipe en
a backing membersfor a slip segment which may gaging faces, each'face of fwhich istoothed to
35 be adapted to fit at least two dilîerentsized slip l,
The` invention contemplates broadly the provi
sion of a `slip in which the pipe jaws day be moved
to give fresh pipe engaging areasV without re
40A placing‘the parts, and where the jaws‘are free’ to>
engage the pipefj.:
4As seen in .'Fig. 3 peach pipe engaging face of
th'effjaw f is " formed with` flattened .areasv 26 and
27„A the areas 26 being :cut more deeply in' the
toothed" face ofthe vjaw than are the areas 2l.Y
Referring now to Fig.` 2 the areas 26 and 21
engage‘the interior Vwall oftherecess in the seg
move slightly to align 'themselves with the pipe,
and 'in addition, to adapt the jaws _tobe set' to ' mentïllllwhich >is shaped toreceivethejaw and,
hold various_ sizes `of pipe. __lt_ is also'` conteme ' because of their different depths. _flattened areas
plated that a-"rresiliently mounted >backingmern- ' internt` with the face“ of thesegment leaving
» ‘bermay bev provided on the back. of the segments. a ‘space-23” allowing for relative `longitudinal
on the segment. This per- .
this member being formed Vso that -it may be set _ movementjof the
to adapt the slips; to two‘differentsiz'ed slip'bo\ï/l_s;'_j4 mits a jarring`_ açtionfof _thejaw on the segment
30the'r advantages are thought to`V be apparenti?` >wlien‘tl'le device` is released .by the _upward move
when'` the >following description is fread jin con-V
méntof the'pi'pelâff
-nection with the accompanying drawing.'wheref#`
_ _
The upper“ and low‘érends of’. each jaw ,arev
recessed _atfZS’to interñt with adowel 2'9f'on the
"Figli is‘a‘top plan View of aportion of a slip . lower’endand na cap’ screw 3|’ at"t_h'e uppefend '
thereof.` The doweland screw -i-lt loosely in they
55.. ance vwitlri the inventi_or1_,l_._one_.of_ the segments recess' >s_o _as allow a_` slight playv of _the jaw on
bowl in which are slips constructed in'a'ccord
its support for more ready adjustment of the jaw
to the pipe.
As will be seen in Fig. 1, each jaw has its pipe
the pipe and starting the upward movement of
the segment from the slip bowl.
In place of the rubber pad 43 I may place a
engaging face recessed on an arc interfltting
spring shown at 45 in a recess 46 at the lower
with the rounded end or face 23 of the segment
I4. This allows a rocking of the jaw on the
segment to a certain limited extent' which per
bear against the wear strip 41. I have also shown
the lower end of the wear strip as being provided
mits adjustment of the jaw to the pipe.
with a recess 48 to receive a dowel 49 upon which
are four similar faces on the jaw shown in Fig. 1
10 and it will be obvious that where the cap screw
3| is removed the jaw may be partially rotated
to present another face to the pipe where wear
end of the segment, the spring being adapted to
it is loosely mounted.
The spring 46 tends to
move the lower end of the wear strip against
the slip bowl and allow a slight movement thereof
which permits release of the jaw from the pipe on
has taken place on the face originally employed.A
I am enabled, therefore, to provide four separate
pipe engaging faces to be employed before the
g ously described.
jaw has become too dull for further use.
. form shown in Fig. 1 and Fig. 5, I may mount
In Fig. 4 I have shown how the jaw'may be
varied from that shown in Fig. 1 to provide ad- `
justment for the different sizes of pipe. In this
20 embodiment the jaws are slightly elongated in
one direction, the faces, however, being similar
in al1 respects to those shown in Fig. l. The pipe
engaging faces 34 will be adapted to engage a
pipe of smaller diameter than are the two opposed
faces 35. The recesses 31 at the upper and lower
ends of the jaw are elongated to interñt with the
cap screw 3l and the dowel 29 when the jaw is
mounted on the segment I4.
I have also provided a removable backing strip
§39 by means of which the position of the segment
_ I4 may be varied.
The said backing strip 39 is
preferably rectangular in cross-section and as
shown in Figs. 6 and 7 they are fitted-within
recesses in the outer side of the segment I4’. As
35 the wear strip is wider in one direction than in
the other it may be changed as to position within
the recess to move the segment at different dis
tances from the bowl in which the slip is seated.
In Fig. 6 the wear strip is placed with its
40 narrow thickness toward the bowl so as to ñt a
bowl of slightly larger diameter. In Fig. 7 the
reverse is the case. These wear strips have at
their upper end recesses to receive the cap screws
42 fitting within the recesses 4I. I have shown
45 Vthe lower end of each strip inserted within a
tapered seat at the lower end of the recess which
receives the strip as shown at 40. I may also
provide a resilient pad of compressible material
such as rubber 43 placed between the wearing
strip and the outer side of thev segment I4.
Each segment is provided with one or more
the upward movement of the handle I9 as previ
YWhile the jaws are preferably made in the
them as shown in Figs. 8 and 9. In this case the
segment 5I is shown as rounded on its outer side
to engage the slip bowl and the wear strip 39 is
omitted. The jaw member 51 has two pipe en
gaging faces either of which may be presented
outwardly to engage the pipe. The forward face
of the segment 5I has a dove-tailed recess 52
into which one side of thejaw may be engaged,
the form of the jaws presenting a double tenon
either face of which may engage in the morticed
groove in the face of the segment.
I may also provide resilient strips 6I on the
forward face of the segment to allow a certain
resiliency in the mounting of the jaw and to 30
provide for adjustment of the jaw around the
rounded face 53 of the recess. The lower end of
the recess 52 is closed at 56 as will be seen in
Fig. 8. The upper end of the mortice is closed
by a plate 58 held in position by the screw 59.
The forward face of the jaw which engages the
pipe may be toothed in variouszways and in Fig.
10 I have indicated a desirable form of tooth
which may be used. This tooth is provided by
transverse grooves 63 in the pipe engaging face 40
of the jaw.
Between the grooves are areas 62
which may be knurled to frictionally engage the
pipe. The grooves 63 have their upper walls
inclined downwardly and inwardly, and are thus
adapted to resist downward movement of the pipe 45
relative to the jaw.
In the use of these slips it will be apparent
that the slips are each made up of a plurality of
flexibly connected jaws or segments which have
a limited lateral rocking and Vertical adjustment 50
which allows the jaws to adjust themselves to
laterally extending arms I6 which are adapted
irregularities in the pipe and to irregularities in
to engage with similar arms on adjacent jaws to
provide a hinged connection. The ends of these
arms are formed with an opening to receive a
the slip bowl in which they are seated. In case
hinge bolt which allows a pivot connection be
tween adjacent segments. Each arm is formed
adjacent its end with lateral shoulders Il which
engage to limit the lateral swing of one segment
60 relative to the adjacent segment.
A plurality of jaws thus hinged together may
form one complete slip. In Fig. 1 IV have indi
cated three of such jaws hinged together and pro
vided with a handle I9. Said handle is hinged at
65 its lower end toa pivot pin 2I mounted upon the
upper end of a lug 2|’ on the central segment I4.
It is also to be noted that each handle has an
inwardly extending arm 22 which is adapted to
engage the pipe when the handle I 9 is swung up
70 wardly. With reference particularly to Fig. 2
it will be seen that the upward swinging of the
handle I9 will engage the arm 22 with the pipe
tending to lmovethe jaw outwardly away from
the pipe compressing the pad 43 and allowing
the releaseV of the jaws from engagement with
the slip wedges too tightly between the pipe and
thebowl, the upward movement of the pipe will
cause the jaw member 25 to be moved upward
and jar the segment by the engagement of the
shoulders at 23’ as previously noted. This will
loosen the parts and allow the slip to release. By
the use of the wear strips 39 it is possible to ad 60
just the jaws vtoward and away from the pipe to
accommodate different sizes of bowls. Further,
by the use of jaws, oblong in cross-section as
shown in Fig. 4 adjustment of each jaw may be
made upon its segment to accommodate the differ 65
ent sizes of pipe. The slip is, therefore, remark
ably flexible and is adjustable in various ways,
not only to present different sides or engaging
faces to the pipe, but to accommodate pipe of
varying diameter.
'I‘he device is simple in construction and will
have many advantages obvious to those skilled
in the art.
What I claim is:
1. A pipe engaging slip comprising a plurality 75
ment, and means to limit the movement of said
bowl, pipe engaging jaws carried by said seg
backing member.
ments, each of said jaws havingr a plurality >of
arcuate pipe engaging faces thereon, and re
leasable means to secure> said jaws to said seg
9.A In a device forsupporting4 pipe in wells, a '
downwardly tapered slip segment, a channel `
along the front vertical face thereof, a pipe en
ments whereby either of the pipe engaging faces
of each jaw may be turned to contact the pipe.
gaging jaw insertable into said channel and
securable therein, pipe engaging faces on the
front and back of said jaw, said jaw being slida
bly removable and reversible whereby either oi'
2. In a pipe engaging slip,. a plurality of
tapered segments adapted to fit withinV a slip
10 bowl, flexible connections between said segments,
said faces may be positioned to contact a pipe. 10
a removable jaw ,carried by each of. said seg
ments, a plurality of concave pipe engaging sur
faces on said jaw, and concave-convex bearing
into» said groove, concave pipe engaging areas
on the opposite faces of said jaw, and slots in the
side of said jaws, the walls of said groove being
formed to engage said slots to hold said jaw in
l0. A slip segment, a groove extending verti
cally therealong, a pipe engaging jaw insertable
surfaces between said jaw and said segment t0
allow rocking of said jaw on said‘segment.
3. In a pipe engaging slip, a plurality of
tapered segments adapted to ñt within a slip
bowl, flexible connections between said segments,
a removable jaw carried by each of said segj
. of tapered segments adapted to ñt within a slip
ments, said jaw having four pipe engaging faces
extending longitudinally thereof, said jaw being
relcasably mounted relative to the adjacent seg
11. A slip segment, a‘groove extending verti
cally therealong, a pipe engaging jaw insertable
into said groove, concave pipe engaging areas on
the opposite faces of said jaw, slots in the sides
of said jaws, the walls of said groove being
ment so that either of the four faces may be pre- ' formed to engage said slots to hold said jaw in ,
sented for contact with the pipe.
place, and a convex bottom in said groove to sup
4. A slip adapted to be used with either of two - port said jaw.
different sizes of pipe including a pluralityY of
l2. In .combination with a slip having a plutapered segments, combination four-faced jaws rality of jaws adapted to engage a pipe, a handle
carried by said segments, said jaws being in oppo
for lifting said slip, a pivoted connection be
site pairs, and means releasably securing said tween said handle and said slip whereby said
jaws to said segments, the opposite faces of. said handle normally falls to a lowered position, and
combination jaws forming one pair being formed- means responsive to the raising of said handle
to engage the same size pipe, said jaws differing to engage the work and thus to force the slip
in distance across the respective pairs of jaws d away from the pipe.
' 13. A slip segment, a longitudinal groove on the
to compensate for the ‘difference in diameter
of the two sizes of pipeto be engaged.
forward side thereof, a pipe engaging jaw slida
’ 5. In combination with a slip segment, a re
ble longitudinally in said groove, concaved pipe
newable backing member interposed between said engaging areas on the opposite faces of said jaw,
segment and the slip bowl, and a yieldable sup . a resilient cushioning means engaging the inner
port between said slip segment and said backing side of said jaw in said groove, the walls of said
member adapted to be compressed by the wedg
groove being formed to engage the sides of said
ing of the segment.
, . Y
jaw to hold said jaw in position.
14. A slip segment, >a longitudinal groove on
6. In combination with a slip segment adapted
to fit a slip bowl, a renewable backing member the forward side thereof, a pipe» engaging jaw
interposed between said segment and the slip slidable longitudinally in said groove, ccncaved
45 bowl, said backing member being substantially
rectangular in cross-section and adapted to be
turned to vary the thickness of the assembled
slip segment so as to fit in slip bowls of different
pipe engaging areas on the opposite faces of said 45
jaw, a resilient cushioning means engaging the
inner side of said- jaw in said groove, a concaved
face on said segment engaging said jaw whereby
V it may have a rocking movement on said seg
7. In` combination with a slip segment, a re » ment against the pressure of said resilient means. 50
15. A supporting segment the forward face of
newable backing member therefor adapted to en
which is convex, a pipe engaging jaw having a
gage the slip bowl, means to secure >said member
plurality of concave faces to engage said convex
in position, and a layer of. resilient material be
face, means lon said segment to retain said jaw
55 tween said member and said slip segment.
movably in position on said segment, rubber 55
ì 8. In combination with a slip segment, a re
cushions at each side of said face to yieldably
newable backing member interposed between said engage said jaw, and pipe engaging teeth on the
segment and the slip bowl, resilient elements
vtending to separate said member from said seg
concave faces of said jaw.
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