Internal Pipe-Gripper Page: 4 of 5
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1,0oec3 cl,
with the casing. Now, assuming that the
pipe casing is to be extracted, and has hadl
its several sections separated, as .Lescribed
in the foregoing; the upper and lower se-
5 tions of my improved gripping tool are se-
cured together, as shown in Fig. 1. The
tool is now lowered through the casing until
the rests 15 are seated on the lower sect ion
6, whereupon the jaws 13 are brought- into
10 gripping engagement, as described, and then
the jaw seating element 33 is-allowed to de-
scend until it has forced the jaws 37 into
gripping engagement with the upper pipe
section. The sustaining element may then
,5 be disengaged from the screw-threads 9, orr
disconnected at its upper end and allowed
to fall into the casing, whereupon, the said
pipe jack, or other proper, means may be,
set into operation for raising the upper see-
20 tion of casing, so that the jaws 37 are forced
into more positive gripping contact with the
upper section of casing, and the grip-
ping tool now constitutes a coupling or con-
nection between the upper and lower see-
25 tions of casing. As the casing is raised, it.
may be disjointed and removed from the
sections which are being raised, until the
gripping tool has been drawn sufficiently
above the surface of the ground to allow
30 the lower section to be engaged by the pipe
jack, whereupon the tool may be removed,
as described.
Obviously, if the casing is found to be
disconnected in several places, one of ny
35 provedd gripping tools may be employed
for each disconnected portion; the lower
gripping tool 'being seated into gripping
contact. and then the next lower, and so on
until all of the sections have been connected,
40 as described.
It will be seen that I . have provided a
device of this character which is fully capa-
ble of attaining the foregoing objects, and
in a thoroughly practical and efficient
45 manner.
I do not limit my invention to the exalt
details of construction and combination4id
arrangement of parts, as herewith illus-
trated and described, but my invention-ma.v
50 only be limited by a reasonable interpreta-
tion of the following claims.
I clair:-n
1. III a pipe gripmig tool, a spear el'-
niot having an upwardly inclined jaw-
55 seating element, toothed and apertuled jaws
slidably seated for vertical movement on
said jaw-seitin element. studs slidably
'e'ated in I he apertiures of the laws; a draw
rod eniga 'cd with the studs and extending
60 upwardly through a central aperture of the
spear element, a swivel element mounted for
rotary movement on the spear element,
means for holding the swivel element
against longitudinal movement relative to,
65 the spear element, and depressible support-ing elements carried by the spear element,
said draw rel being in serew-threaded en-
gagement with the siivel element for mov-
ing the studs and thereby moving the jaws
upon the upwardly inclined jaw-seating ele-. 7,
ment for forcing tie jaws into engagement
with a pipie o aSing, substantially as de-
scribed.
2. 1in a pip gripping and raising tool, a
spear element having a vertical aperture 75
therethrough and having recesses in its
outer surface, said spear element including
an upwardly inclined jaw-seating element,
ja ws having upwardly directed teeth mount-
ed for vertical movement on the upwardly o
inclined ji-seating portion, a draw rod
extending through the vertical aperture of
the spear element, means coperating with
the draw rod for moving the jaws upon the
inclined yaw-seating element, rests seated ini5
the recesses of the spear element and adapt-
ed to extend from the recesses into contact
with the upper end of a pipe or casing, and
a swivel element in screw-threaded engage-
ment with said draw rod and adapted to go
move said draw rod longitudinally though
the spear element.
3. In a tool of the character described, a
spear element having gripping means asso-
ciated therewith, said spear eierient. hay- -5
ing a. vertical aperture therethrough. a draw
rod extending through the vertical aper-
tore and engaging the gripping. means for
operating the latter. a swivel element ir
screw-threaded engagement with the draw 1c
rod, and tn oil chamber in the upper part of
the swivel element, said draw rod extend-
in, into sa' oil chamber, so that oil may be
fed by gravity and capillary attraction
around the screw-threaded end of the rod, goo
for thoroughly lubricating the swivel ele-
ment.
4. In a device of the character described.
a spear element having a vertical aperture
and having a boss through which the ver- 110
tical aperture extends, pipe gripping means
associated with the spear element, a draw
rod connected with the pipe gripping means
foi operating the latter, said draw rod ha-
ing its upper end screw-threaded, a swivel tS
element having an aperture into which the
boss of the spear elemeint is rotatably seated,
said swivel ele nvnt ha ving a screw-threaded
erture in engdeipent wth thethreadled
end of the draw rod, said swivel element be- 120
ing provided with an oil chamber in con-
uiinicationm with the screw-threaded aper-
I tre So that oil may be fed by capillary at-
traction and gravity around the threaded
end of the draw rod and thereby lubricate 125
the rod and the boss.
5. In a gripping tool for ra ising well cas-
ings, a spear element having gripping jaws
seated thereon and having means associated
therewith for moving the gripping jaws i1v'A
a
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McConnell, Scott R. Internal Pipe-Gripper, patent, August 5, 1913; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth853625/m1/4/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.