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Патент USA US3062314

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Nov._ 6, 1962
M. M. KINLEY ETAL
3,062,304
JARRING TOOLS
Filed Dec. 23, 1959
4 Sheets-Sheet l
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INVENTORSY
BY
K/'
Nov. 6, 1962
M. M. KINLEY ETAL
3,062,304
JARRING TOOLS
Filed Dec. 23, 1959
4 Sheets-Sheet 2
E??ld?‘l
tires
Patented Nov. 6, 1952
1
3,962,304
EARRING TOOLS
Myron M. Kinley and .io'nn (I. Kinley, Houston, Tex; said
Myron M. Kinley assignor to said John (I. Kinley
Filed Dec. 23, 1959, Ser. No. 861,717
20 Claims. (tit. 175-296)
2
jarring tool of this invention which is adapted to be
lowered into a well pipe W or other pipe in which a
stuck object or ?sh such as a choke is located (not shown).
The jarring tool T is lowered into the pipe W to connect
a conventional ?shing tool F (a portion of which is il
lustrated) to the stuck ?sh. The jarring tool T is prefer
ably lowered on a wire line or other ?exible support 10
which is releasably connected to the jarring tool T with a
to jarring tools for use in wells.
conventional releasable coupling assembly A or any other
This application is a continuation-in-part of United 10 means for connecting the Wire line 10 to the jarring tool
States patent application Serial No. 599,398, ?led July 23,
T for lowering the jarring tool T into the well bore and
1956, now abandoned.
for thereafter permitting the removal of such wire line
An object of this invention is to provide a new and
10 from the jarring tool T. Conventional sinker bars or
improved jarring tool for applying a jarring force to an
weights 12 are also preferably provided at the upper end
of the jarring tool T for assisting in the lowering of the
object in a Well or similar location by utilizing ?uid pres
sure for initiating the jarring force.
jarring tool T into the well pipe W. Brie?y, then, the
Another object of this invention is to provide a new
jarring tool T is lowered into the well pipe W 011 the
and improved jarring tool which is adapted to be lowered
wire line or other ?exible support 10, the conventional
into a well on a wire line or other support for connection
?shing tool F is connected to the stuck ?sh, the wire line
10 is manipulated to move the jarring tool T to the posi
with a stuck choke or other object in the well, the wire
line vbeing releasable from the jarring tool prior to the
tion shown in PEG. 2, and the wire line connector A is
released from the jarring tool T to permit the removal
applying of an upward jarring force to the stuck choke
or other object with said jarring tool, whereby fouling or
of the wire line 10 from the pipe W. Also, as will be
explained, the ?uid pressure in the well pipe W above
twisting of the wire line as a result of the upward move
the jarring tool T is then reduced so that the fluid pres
ment of the jarring tool following the jarring of the
stuck object is avoided.
sure in the pipe W below the jarring tool T acts thereon
to impart a lifting force to the tool T. Such lifting force
A further object of this invention is to provide a new
This invention relates to jarring tools, and particularly
and improved tension jar assembly ‘for controlling the
amount of jarring force applied to a stuck object con
nected therewith.
A still further object of this invention is to provide a
new and improved jarring tool having a tension jar as
sembly and a ?uid seal therewith for creating upper and
lower ?uid chambers with a differential in ?uid pressure
is changed into a jarring force, as will be explained,
which is transmitted to the stuck object below the ?shing
tool F. Thus, with the jarring tool T of this invention,
the ?uid pressure in the pipe W is utilized for imparting
a jarring force to the stuck ?sh to free or loosen same for
the removal from the pipe W.
Considering the invention in detail, the jarring tool T
acting on said tension jar assembly to impart a jarring
of this invention includes a tubular body 15 which extends
force to a stuck object when a predetermined fluid pres
sure differential is developed.
The construction designed to carry out the invention
‘for substantially the full length of the jarring tool T. For
purposes of assembly, the body 15 is preferably formed
will be hereinafter described, together with other features
thereof.
The invention will be more readily understood from a
reading of the following speci?cation and by reference to
the accompanying drawings forming a part thereof, where
in an example of the invention is shown, and wherein:
FIG. 1 is a view, partly in elevation and partly in sec
tion, illustrating the jarring tool of this invention as it
is being lowered or run into a pipe for attachment to a
stuck object or ?sh in the pipe;
FIG. 2 is a view similar to FIG. 1, but illustrating
the jarring tool of this invention in the jarring position
after same has been connected to the stuck object or ?sh
in the pipe but prior to the application of a jarring force
to such object or ?sh;
FIGS. 3A, 3B and 3C are sectional views which to
gether illustrate the details of the jarring tool of this in
vention in the same jarring position illustrated in FIG. 2;
FIG. 4 is a horizontal sectional view, taken on line
4—4 of FIG. 3A;
FIG. 5 is a sectional view of a portion of the jarring
with two upper semi-cylindrical tubular sections 15a and
15b (FIG. 4) which are assembled together with dowel
pins 16. The lower ends of the upper semi-cylindrical
tubular sections 15a and 1512 are threaded as indicated at
150 for threaded engagement with the threads 15d of
the lower tubular body section 15e. The lower ends of
the semi-cylindrical body sections 15a and 15b together
‘form a lateral shoulder or jarring surface 15]‘ for re
ceiving the jarring impact or blow, as will be explained.
A ?uid pressure sealing member or annular sealing
cup 18 which is formed of rubber or other resilient ma
terial is mounted on the external surface of the body 15
with a solid clamping ring 19. The sealing cup 18 is
adapted to engage the inner surface or bore of the pipe W
when the jarring tool is in use for the jarring operation,
as will be explained. As can be seen in FIG. 3A, the cup
18 has its open end facing downwardly so that the ?uid
pressure below the cup 18 is prevented from ?owing up
wardly around the exterior of the body 15 of the tool T,
whereby the space above the cup 18 is an upper chamber
in the pipe W and the space below the cup 18 is a lower
chamber therein so that when different ?uid pressures
tool of this invention showing same with the jarring 60 exist in such chambers there is a differential ?uid pres
sure or force acting across the cup 18.
surfaces or shoulders in jarring contact with each other
A plurality of latch ?ngers 20 extend downwardly from
such as would occur when the jarring vforce is applied
the resilient cup 18 and are positioned within a latch
with the jarring tool to the stuck object or ?sh in the
sleeve 22 during the lowering of the jarring tool T into
PIPe;
the pipe W so as to hold the outer or external surface of
FIG. 6 is a sectional view of a modi?ed latching as
the seal cup 18 out of engagement with the inside surface
sembly for the tension or jarring member;
of the pipe W to prevent the application of a ?uid pres
FIG. 7 is a View, partly in section and partly in eleva
tion, illustrating a modi?ed portion of the tool of this
sure force to the jarring tool during lowering into the
invention; and
pipe.
The latch sleeve 22 has inwardly extending tabs
FIG. 8 is a cross-sectional view taken on line e_s of 70 or projections 22a which extend into longitudinal slots or
FIG. 7.
In the drawings, the letter T designates generally the
openings 15g in the lower tubular body section 15s.
When the latch sleeve 22 is holding the latch ?ngers 20
3,062,304.
3
in the retracted position (MG. 1) to thereby hold the
sealing cup 15} in the retracted or inactive position, the
latch sleeve 22 is at the upper end of the lower tubular
body section 15a and is in frictional engagement with the
external surface thereof in the vicinity of the annular nut
25 (PKG. 3B). The inwardly extending tabs or projec
tions 22a are, therefore, near the upper ends of the longi
tudinal slots 15g, but subsequently, the latch sleeve 22 is
lowered, as will be more fully explained hereinafter, so as
to move the sleeve 22 downwardly to the position shown
in FIG. 3B, whereby the inherent resiliency of the seal
ing cup 18 causes same to move outwardly to contact the
inner surface of the well pipe W (FlG. 3A).
A longitudinally extending jarring member or bar 26 is
positioned within the bore of the body 15 for longitudinal 15
movement relative thereto. The bar 26 is threaded at 26::
for connection with the sinker bars 12, or for direct con
nection to the ?shing neck 27 (FIGS. 1 and 2) in the
4
force to the body 15 which in turn imparts a jarring force
to the stuck object in the well pipe W.
During the lowering or running in of the jarring tool
T in the well pipe W, the bar 26 is in a raised position
relative to the body 15 (FIG. 1) and is held in such
position by a shear pin 30 (FIG. 3B) which extends from
the tension bar 26 through the body 15. Such shear pin
36 is severed or sheared by the manipulation of the wire
line 10, after the jarring tool T has been lowered in the
pipe W and the ?shing tool F has been connected to the
stuck object, so that thereafter the bar 26 is lowered
relative to the body 15 to the position shown in FIGS.
3A and 33.
During such lowering of the bar 26, the latching sleeve
2 is carried downwardly to release the ?ngers ‘20. Such
downward movement of the latching sleeve 22 is effected
with a guide pin 32 which has parallel ?at surfaces 32a
engageable with the Walls of one of the longitudinal slots
15g. Such guide pin 32 prevents the turning of the bar
event the sinker bars 12 are not utilized. An annular
?ange or shoulder 26b is provided near the upper end of 20 26 relative to the body 15 during longitudinal movement
the tension bar 26 for engagement with the upper ends
of the upper body sections 15a and 15b (FlG. 3A) to
limit the downward or inward movement of the bar 26
relative to the body 15.
The bar 26 has an enlarged diameter section 26c which
is of substantially the same diameter as the internal di
ameter of the enlarged diameter bore portion 15/1 of the
upper body sections 15a and 15b so that a seal ring 23
formed of rubber or other resilient material is adapted
to seal with the enlarged diameter section 26c when the
shoulder 26b is in contact with the upper ends of the
body sections 15a and 15!). By reason of the enlarged
inner bore portion 1511 of the upper body sections 15a
and 15b, an annular space is provided between the ex
ternal surface of the bar 26 below the enlarged portion
260 and the internal bore surface 15h. Fluid communi
cation between the arca in the well pipe W below the
resilient cup 18 and the area thcreabove is established
through one or more openings film formed near the
lower end of the enlarged inner diameter bore portion
of the bar ‘26 relative to the body 15. A special opening
15p is provided in the body 15 for the assembly of the
guide pin 32 at the lower end of the bar 26. Thus, prior
to the time that the upper body sections 15a and 15b are
threaded into the threads 15d of the lower body section
152, the opening 26e for the pin 32 is aligned laterally
with the opening 15p, so that the guide pin 32 is inserted
into such opening 260. Thereafter the bar 26 is raised to
move the pin 32 into one of the longitudinal slots 15g
with the ?at parallel guide surfaces 32a in contact with
or substantially in contact with, the walls of such slots
15g. The body sections 15a and 1512 are then assem
bled and threaded into the threads 15d, so that there
after the pin 32 does not drop downwardly into the open
ing 15p (FIG. 3B).
For releasably connecting the bar 26 to the body 15 to
thereby hold the bar 26 to the body 15 until a predeter
mined ?uid pressure diiferential has been developed across
the bar 26, a tension arm 35 is pivotally connected to the
body 15 near its lower end. Such tension arm 35 extends
into a longitudinal slot 15r and is integrally connected
15/1 and which communicate with said annular space
with a resilient adjusting arm 36 (FIG. 30) so that to
around the bar 26. Thus, when the bar 26 is raised
gether the arms 35 and 36 form a substantially U-shaped
relative to the body 15 so that the enlarged diameter
member which is pivotally mounted in the body section
section 266 of the member 26 is out of the bore portion
1511, which is the case when the jarring tool T is being ‘- 152 by a pivot pin 37 extending therethrough and into the
Walls of the body 15c. An adjusting and retaining screw
lowered into the well pipe W (FIG. 1), then ?uid com
38 is threaded into the adjusting arm 36 so as to utilize
munication from the area in the pipe W below the cup
the resiliency of the arm 36 for pulling or pivotally mov
18 t0 the area above the cup
is established through
ing the tension arm 35 into contact with a stop pin 39
flow into the port or ports 15m and through the annular
space between the bar 26 and the body 15 to the area 50 (FIG. 3B) which is mounted in the walls of the body
section 152. Thus, as the adjusting arm 36 is moved to
above the body 15. Thus, the fluid pressure above and
the right (FIGS. 3B and 3C), the tension arm 35 is also
below the seal cup 18 is equalized during the running in
of the jarring tool T in the well pipe W. However, when
the bar 26 has been lowered relative to the body 15 to
move the enlarged section 26c into sealing engagement
with the seal ring 28, the ?uid communication through the
ports 15m and the annular area externally of the bar 26
is closed off. Since the seal cup i8 is released to its active
position in engagement with the pipe W prior to such
closing off of the ?uid communication, it is believed
evident that the ?uid pressure below the seal cup 13 is
then directed upwardly against such cup 18, and if the
pressure below the cup exceeds the pressure thereabove,
an upward force is exerted on the cup 13. Such ?uid
moved to the right about the pivot pin 37, but upon the
engagement of the tension arm 35 with the stop pin 39,
then further movement of the arm 35 to the right is
prevented and a further movement of the arm 36 to the
right tends to place the arm 35 under an increased tension
or force which must be overcome in order to move the
arm 35 to the left, or laterally away from the stop pin 39.
The amount of such resilient force thus applied to the
tension arm 35 by the resilient adjusting arm 36 depends
upon the extent to which the arm 36 is pulled to the right
by the screw 38 when the arm 35 is in contact with the
stop pin 39. In the preferred construction, the adjusting
pressure also acts on the bar 26 tending to urge same 65 pin 38 has an annular shoulder 38a which contacts the
upwardly relative to the body 15.
Near the lower end of the bar 26, an annular lateral
arm 36, and the inner annular surface 38b of the head of
the screw 38 engages the bottom surface of a recess 15s,
or as shown in the drawings (FIG. 3C), such surface 38b
shoulder or jarring surface 26d (FIG. 3B) is provided.
engages a shim or washer 40 disposed at the bottom of
Such jarring surface 26d is normally spaced below the
the recess 15s. The amount of tension placed in the
jarring surface 15]‘, but, as will be explained, when a 70 bar 35 can therefore be readily adjusted by increasing or
predetermined ?uid force is exerted upwardly on the
bar 26, the bar ‘26 is caused to move upwardly relative
to the body 15 to bring the jarring surfaces 26d and 15]‘
into jarring contact with each other to impart a jarring 75
decreasing the number of the shims 40 so as to move the
arm 36 further to the right or to the left. The amount
of tension can be calibrated so that the use of varying
numbers or thicknesses of shims produces various known
3,062,304
5
predetermined forces on the arm 35 which are selected
so as to require various corresponding ?uid pressure
diiferentials across said cup 18 and said bar 26 to release
the member 42 from the arm 35, as will be more evident
hereinafter.
6
the member 42 pass below the surface 35a to the position
shown in FIG. 3B. The spring 44, of course, maintains a.
constant pressure on the laterally movable member or sec
tion 42 and returns it to the bottom 43a after it has passed
below the lateral shoulder 35a on the arm 35. With the
The upper end of the tension arm 35 is formed with an
inclined hook or inclined surface 35a which is adapted to
arm 35 and the jar 26 thus in position for beginning the
jarring action, and with the ?shing tool F connected to
engage with an inclined surface or shoulder 42a on a
the stuck object therebelow, the connector A is released
laterally movable end member or section 42 disposed at
from the ?shing neck 27 in a known manner to eifect the
the lower end of the bar 26 (FIG. 3B). The end member 10 removal of the wire line or ?exible support 10 from the
or section 42 is slidable laterally in a slot ‘43 which is in
pipe W. Also, at that time the annular ?uid pressure
clined downwardly and to the left as viewed in FIG. 313.
sealing cup 18 is in sealing contact with the bore or
However, a stop shoulder or bottom 43a is formed in the
inner surface of the well pipe W. Thereafter, the pres
opening 43 to limit the movement of the end section or
sure in the pipe W is reduced above the seal cup 13 by
member 42 to the left or in a direction towards the arm 35. 15 permitting the pressure in the well pipe W above the
A lead spring 44 resiliently engages the laterally movable
jarring tool to bleed off through an open valve at the
end member 42 for urging same to the position shown in
surface of the well. The pressure of the ?uid in the well
FIG. 3B wherein it is in contact with the bottom surface
below the cup 18 is trapped below the cup 18 and a differ
43a of the slot 43. The spring 44 is held in position at the
ential in ?uid pressure is thereby developed across the
lower end of the bar 26 with a threaded screw 45 which 20 cup 18 because of the reduction in the ?uid pressure above
preferably has an enlarged head 45a which extends into
the cup 18. There is a slight leakage of ?uid through
one of the longitudinal slots 15g diametrically opposite to
the slot 15g in which the guide pin 32 is disposed.
the longitudinal spacing between the body sections 15a
In the use or operation of the jarring tool T of this
scribed. The longitudinal spacing between the body sec
and 15b (FIG. 4) for a purpose to be hereinafter de
invention, it is lowered into the pipe W with the parts in 25 tions 15a and 15b is so slight that it does not interfere with
the position illustrated in FIG. 1 of the drawings, wherein
the obtaining of the necessary pressure differential above
a wire line or other ?exible support 10 is connected to
and below the cup 18 for urging the cup 18 upwardly to
the jarring tool T through a conventional connector A.
obtain the jarring action. When the cup 18 is thus urged
The connector A is releasably attached to the upper end
upwardly, the body 15 cannot move upwardly because the
of the tool T through the ?shing neck 27 which is mount 30 lower end of the body 15 is directly connected to the stuck
ed above a number of sinker bars 12. Also, a convention
?sh through the ?shing tool F. The aforesaid differential
al jarring tool (not shown) may be positioned between the
in ?uid pressure is created to provide a ?uid pressure
?shing neck 27 and the upper end of the jarring tool T
force acting upwardly upon the bar 26. The bar 26 con
to produce a jar su?icient to shear the pin 39 after the
tinues to be urged upwardly by the ?uid force until such
jarring tool T has been lowered in the well pipe W. Thus,
force acting upwardly thereon reaches a predetermined
the tool T is lowered in the pipe W to move the ?shing
amount at which time the lateral force on the tension
tool F into contact with the stuck choke or other object
arm 35 which is applied to the right (FIG. 3B) through
in the pipe W. The ?shing tool F is also of conventional
the resilient arm 36 is overcome to move the arm 35
construction and is of the type which engages and becomes
laterally to the left (FIG. 38) so that the shoulder 42a
connected to the stuck object by simple manipulation of 40 can pass upwardly above the shoulder 35a. When such
the wire line 10.
Such ?shing tools F are well known.
Thereafter, by the manipulation of the Wire line N, or
by a jarring action with the conventional jar previously
mentioned (not shown), the shear pin 30 is severed or
sheared to permit the tension bar 26 to move downwardly a. :VI
in the body 15 to the position shown in FIG. 2 and in
FIGS. 3A-3C. It should be noted that prior to the time
that the pin 30 is sheared, the resilient ?ngers ‘20 are con
movement of the end member 42 above the tension arm
35 occurs, the upward force on the arm 26 causes it to
rise very rapidly until the jarring surface 26d contacts
the jarring surface 15]‘. It is to be noted, by Way of exam
ple, that a ?uid pressure differential in the range of one
hundred (100) to three hundred (300) pounds per square
inch would normally be su?icient to e?ect the release of
the member 42 from the tension arm 35 and obtain the
?ned within the bore or interior of the latching sleeve 22
jarring action. The slight longitudinal spacing between
(FIG. 1)’ to hold the resilient sealing cup 13 in an inactive 50 the body sections 15a and 1512 does not normally inter
position out of engagement with the wall of the well pipe
fere with the obtaining of such pressure differentials, and
W. Also, during the lowering of the jarring tool T in the
of course such spacing may be made smaller if greater
pipe W, the by-pass for ?uid, including gas, is open
?uid pressure differentials are desired or become necessary
through the ports 15m and the annular space between
under certain well conditions. The jarring impact caused
the tubular bar 26 and the enlarged diameter bore section ’ by the contact of the jarring surfaces 26d and 15]‘ is trans
15h and outwardly through the open upper end of body
mitted to the body 15 and thus to the stuck ?sh connected
sections 15a and 15b.
therebelow so as to apply a jarring force to such stuck
However, after the pin 30 has been sheared, the bar 26
?sh to loosen or move same. It should be pointed out
moves downwardly by its weight and the weight of the
that even though there is some drop in the ?uid pressure
sinker bars 12 and other equipment thereabove. The 60 di?erential acting on the bar 26 when the enlarged portion
latching sleeve 22 is carried downwardly with the bar 26
260 thereof moves above the seal 28, such drop is not
by reason of the engagement of the pin 32 with the tab 22::
su?icient and does not occur rapidly enough to prevent
therebelow. Finally, the enlarged diameter section 26c
or substantially reduce the jarring contact between the
of the bar ‘26 moves into sealing contact with the seal
jarring surfaces 26d and 15]‘.
ring 28 when the annular shoulder 26b seats against the
The jarring action may be repeated without removing
ends of the upper body sections 15a and 15b (FIG. 3A).
the tool T from the pipe W by closing the usual well head
During the movement of the enlarged diameter portion
valves (not shown) at the surface of the well to permit the
26c into the bore of the upper body sections 15a and 15b,
?uid pressure above and below the cup 18 and the rest of
the laterally movable end section 42 at the lower end of
the tool T to equalize. When such equalization occurs,
the tension bar 26 is moved downwardly below the hook 70 the weight of the bar 26, and the sinker bars 12 if used,
or lateral surface 35a of the tension arm 35. Such move
cause the bar 26 to fall by gravity relative to the body 15
ment is permitted because the inclined surface 42b of the
to re-latch the member 42 below the arm 35 (as in FIG.
laterally movable member '42 engages with the upper sur
3B). During such descent of the bar 2%, the longitudinal
face of the arm 35 to shift the end section 42 to the right
space between the body sections 15a and 15b permits
against the action of the spring 44 su?iciently to let 75 enough ?uid ?ow therethrough in addition to the ?ow
3,062,304
'7
8
through the ports 15m to allow the enlarged section 26c
invention shown in FIGS. 7 and 8 is the same as shown
to enter the seal 28 and reach the seated position shown
in FIG. 3A. Thereafter, the ?uid pressure above the tool
T may again be reduced to obtain another jarring stroke.
Such jarring strokes can thus be repeated as desired until
in FIGS. 3A and 4, respectively, and the parts that are the
same have like numerals and letters in both forms of the
invention.
The foregoing disclosure and description of the inven
tion is illustrative and explanatory thereof and various
changes in the size, shape and materials, as well as in the
tool T from the well pipe W.
details of the illustrated construction, may be made within
When the ?sh becomes loosened by such jarring force,
the scope of the appended claims without departing from
the upward force imparted to the jarring tool T by the
pressure below the cup 18 continues to act upwardly on 10 the spirit of the invention.
‘What is claimed is;
same to lift the stuck object upwardly in the well pipe W.
1. A jarring tool adapted to be positioned in .a Well
The frictional contact of the cup 18 with the pipe W will
bore, comprising a tubular body having a jarring surface,
prevent the tool and connected parts from dropping back
said body having means therewith for connecting to an
down in the ‘pipe W. If the stuck object is merely loosened
object to be jarred, a bar in said body for longitudinal
and is raised upwardly only a small distance in the pipe W,
movement relative thereto, said bar having a jarring sur
the connector A may be again connected to the ?shing
the ?sh is loose or it is otherwise desirable to remove the
neck 27 by lowering same on the wire line 10 so that the
jarring tool T can be lifted upwardly on the wire line 10
to remove the stuck object or ?sh from the pipe W.
In FIG. 6, a modi?ed latching means for releasably
holding the jarring member 26 is illustrated wherein a
cylindrical rod 142 is utilized instead of the slidable mem—
ber 42. The guide slot 143 is substantially the same as the
face adapted to contact said jarring surface on said lLll'FtH
lar body upon a longitudinal movement of said bar rela-'
tive to said body, releasable coacting means on said body
and said bar for preventing movement of said jarring sur
faces towards each other to prevent them from contacting
each other until a predetermined ?uid pressure differential
is developed across said bar so as to exert a predetermined
upward force on said bar, an annular seal between said
143 are at a steeper angle of inclination because the spring 25 body and the well bore for sealing off the annular space
between the well bore and said body as a predetermined
44 is generally eliminated when using the rod 143. The
pressure differential across said seal is developed, said bar
stop surface 143a prevents the rod 142 from rolling out of
being exposed to the ?uid pressure above and below said
the slot 143 and such surface 143a corresponds with the
guide slot 43, although ordinarily the walls of the slot
stop surface 43a. The operation of the modi?cation of
seal, and co-acting surfaces on said bar and said body for
throughout its length rather than being formed in two
member for preventing said second member from being
which is slightly smaller in diameter than the bore 11511
and said second member until said predetermined amount
of ?uid pressure differential is applied to said second
FIG. 6 is substantially the same as with the member 42, 30 restricting ?uid ?ow through said body until said prede
termined pressure differential is developed so that the
but since the spring 44 is usually eliminated when using
pressure differential acting on said bar effects the release
rod 142, the rod 142 rolls to the stop surface 143a by
of said releasable coacting means to obtain a jarring con
gravity alone for returning to the latched position below
tact between said jarring surfaces.
the hook 350:. It is also believed evident that a ball (not
2. A jarring tool adapted to be connected to an object
shown) could be used instead of the cylindrical rod 142
in a pipe, comprising a ?rst member having a jarring sure
and such ball would roll in the slot 143 in substantially
face, a second member longitudinally movable relative to
the same way as the rod 142.
said ?rst member and having a jarring surface normally
In FIGS. 7 and 8, another modi?ed form of the inven
spaced from said jarring surface of said ?rst member but
tion is illustrated. FIG. 7 illustrates the upper portion of
the tool T of this invention which corresponds with the 40 being movable into jarring contact therewith, a seal means
between said ?rst member and said pipe adapted to have
upper portion of the tool T shown in FIG. 3A but which
a pressure differential thereacross, said second member
is modi?ed as compared to such portion shown therein.
being exposed to the ?uid pressure above and below said
The lower portions of the tool T shown in FIGS. 3B and
seal means, a tension means mounted on said ?rst mem
3C are the same in both forms of the invention except that
her, and means on said tension means and on said second
the body 115 of FIG. 7 is a single tubular member
moved longitudinally relative to said ?rst member until
half sections 15a and 15b as seen in FIGS. 3A, 3B and 4.
a predetermined amount of ?uid pressure differential is
FIG. 8 is a view which corresponds with FIG. 4 but
applied to said second member to release same from said
further illustrates the construction of the body 115 as a
50 tension means with a movement of said jarring surfaces
tubular member.
towards each other and into jarring contact for imparting
In FIGS. 7 and 8, the bar 126 serves the same purpose
a jarring force to said object, and means for restricting
as the bar 26 but the upper end thereof has been modi?ed
the flow of the ?uid pressure between said ?rst member
by providing an upper enlarged diameter section 1260
of the body 115 so as to provide a restriction to ?uid ?ow
between the enlarged diameter section 126C and the bore
11511 during the jarring stroke but also permitting a rela
tively rapid return of the bar 26 to its re-latched position
after a jarring stroke. Thus, it will be appreciated that
the circumferential gap or spacing between the section 126
and the bore 115h serves the same purpose as the longi
tudinal gap or spacing between the body sections 15a and
15b in the form of the invention shown in FIGS. 3A and
4 in particular. In both forms of the invention, such gaps
or spacing are exaggerated in the drawings for clarity.
For the purpose of assembly and disassembly, the bar
126 is formed at its upper end with a threaded shank 126g
which is threaded into a threaded bore 75a of an adapter
75. Such adapter 75 has an annular lateral shoulder 75b
formed thereon to serve as a stop for limiting the down
ward travel of the bar 26. Such adapter has an upper
threaded shank 750 which is threaded into a bore 12a
member.
3. The structure set forth in claim 2, wherein said
tension means includes a tension arm mounted on said
?rst member, and coacting surfaces on said tension arm
and said second member engageable with each other prior
to applying said predetermined amount of ?uid pressure
to said second member but being separable from each
other when said predetermined amount of ?uid pressure
is applied to said second member.
4. The structure set forth in claim 2, wherein said seal
means includes an annular resilient seal adapted to seal
with the pipe and said ?rst member during the applying
of the fluid pressure to said second member.
5. The structure set forth in claim 2, wherein said seal
70
means includes an annular resilient seal adapted to seal
with the pipe and said ?rst member during the applying
of the ?uid pressure to said second member, and means
for latching said annular resilient seal in an inactive posi
Except for the above noted differences, the form of the 75 tion out of sealing contact with the pipe while running
of a sinker bar 12 as shown in FIG. 7, if one or more
sinker bars 12 are used.
3,062,304
9
same into the pipe and prior to connection to the stuck
12. The structure set forth in claim 8, including an
annular resilient seal adapted to seal with the pipe and
said ?rst member during the applying of the ?uid pres
object in the pipe.
6. The structure set forth in claim 2, including an
adjustment means with said tension means for adjusting
the amount of tension developed in said second member
and thereby the amount of tension developed in said sec
sure to said second member.
13. A jarring tool, comprising a tubular body having
a jarring surface thereon, means for connecting said tu
ond member and thereby the amount of said predeter
bular body to an object stuck in a well, sealing means
mined ?uid pressure required before said second member
mounted on said body, a longitudinally extending bar po
is released from said tension means.
7. A tension assembly for use in imparting a jarring
force to an object, including a support member, a tension
arm mounted on said support member, a jarring bar lon
gitudinally movable relative to said tension arm, said
sitioned in the bore of said tubular body for longitudinal
movement relative thereto, said bar having a jarring sur
face normally longitudinally spaced from said jarring
surface on said tubular body but being engageable there
with, tension means mounted on said tubular body but
being engageable therewith, tension means mounted on
jarring bar being exposed to a ?uid pressure differential
tending to urge same longitudinally relative to said ten 15 said body and said bar for releasably connecting said bar
sion arm, coacting surfaces on said tension arm and said
to Said body for preventing said bar from moving rela
jarring bar engageable with each other to prevent longitu
tive to said body until a predetermined ?uid force is ex
dinal movement thereof away from each other until a
erted on said bar to cause it to move longitudinally in
predetermined ?uid force is applied to said jarring bar,
said body to bring said jarring surfaces into jarring con
means mounting said tension arm for lateral movement 20 tact with each other, and coacting surfaces on said bar
away from the jarring bar, and resilient means urging
and said body for restricting ?uid flow through said body
said tension arm and a portion of said jarring bar laterally
until said predetermined pressure differential is developed.
towards each other with a predetermined force to main
14. The structure set forth in claim 13, including a wire
tain said coaeting surfaces in engagement with each other
line, and means for releasably attaching said wire line
until said predetermined ?uid force has been developed at 25 to said bar during the lowering of said jarring tool into a
which time said tension arm is laterally moved away
Well pipe, said wire line being releasable prior to the ap
from said jarring bar by the coaction of said coasting
plying of the ?uid pressure differential force to said bar
surfaces to thereby release-said jarring bar from said
for obtaining the jarring contact of said jarring surfaces.
tension arm for imparting a jarring impact to said object.
15. The structure set forth in claim 13, wherein said
8. A tension assembly for use in imparting a jarring
fluid sealing means is a resilient cup for sealing with apipe
force to an object, including a support member, a tension
in which said tool is positioned, and including a latching
arm mounted on said support member, a jarring bar lon
sleeve mounted on said body and movable relative there
gitudinally movable relative to said tension arm, said jar
to, and latching ?ngers on said resilient cup adapted to
ring bar being exposed to a ?uid pressure differential tend
be positioned within said latching sleeve for holding said
ing to urge same longitudinally relative to said tension 35 cup in a retracted position out of engagement with said
arm, coasting surfaces on said tension .arm and said jar
pipe to render said cup inactive by permitting ?uid to
ring bar engageable with each other to prevent longitu
pass around same, and means on said bar for longitudi
dinal movement thereof away from each other until a pre
nally moving said latching sleeve relative to said body
determined ?uid force is applied to said jarring bar, means
and away from said latching ?ngers to release same
for restricting the ?uid ?ow around said jarring bar until 40 whereby the resilient cup engages the pipe for sealing
said predetermined ?uid force is developed, means mount~
contact therewith.
ing said tension arm for lateral movement away from
16. In a tool for moving an object in a well, the com
the jarring bar, and resilient means urging said tension
bination of a body, engaging means on said body for en
arm and a portion of said jarring bar laterally towards
gaging the object, a pressure seal on said body for seal
each other with a predetermined force to maintain said 45 ing the space below said seal from the space above said
coacting surfaces in engagement with each other until said
seal, an anvil on said body, a hammer slidably mounted
predetermined ?uid force has been developed at which
in said body and adapted to strike said anvil, said ham
time said tension arm is laterally moved away from said
mer being exposed to the ?uid pressure above and below
jarring bar by the coaction of said coacting surfaces to
said seal so that said hammer is adapted to move longi
thereby release said jarring bar from said tension arm 50 tudinally when a difference in pressure exists above and
for imparting a jarring impact to said object.
below said seal, releasable latch means for holding said
9. The structure set forth in claim 8, including means
hammer at a predetermined distance from said anvil until
for adjusting the amount of said predetermined force ap
a predetermined difference in pressure above and below
plied by said resilient means to thereby adjust the amount
said seal has been reached, and means for restricting
of predetermined ?uid force which is required on said 55 ?uid ?ow between said body and said hammer until said
jarring bar before same is released from said tension arm.
predetermined difference in pressure has been reached.
10. The structure set forth in claim 8, where-in said re
17. In a tool for moving an object in a well, the com
silient means is a ?exible arm formed integrally with said
bination of a body having means therewith for connecting
tension arm, pivot means substantially at the junction be
to an object, an anvil on said body, a pressure actuated
tween said ?exible arm and said tension arm, means con
60 hammer slidably mounted on said body and adapted to
nected with said ?exible arm to apply a pivoting force to
said ?exible arm and said tension arm about said pivot
means, and a stop means engageable by said tension arm
to limit the pivotal movement thereof so that a continued
pivoting force applied to said ?exible arm and said ten 65
sion is resisted by the inherent resiliency of the ?exible
arm which thereby imparts said predetermined force to
the jarring bar.
strike said anvil, a pressure seal on said body for sealing
the space below said seal from the space above said seal,
means for restricting ?uid flow between said body and
said hammer until a predetermined pressure in the well
imparts longitudinal movement to said hammer, pressure
equalizing means above and below said pressure seal
when said hammer has struck said anvil, and latch means
preventing longitudinal movement of said hammer rel
11. The structure set forth in claim 8, wherein said
ative to said body until the predetermined pressure is de
jarring bar has a laterally slidable end section on which 70 veloped in the well.
the coating shoulder for said jarring bar is formed, said
18. In a tool for moving an object in a well, the com
end section being laterally slidable to position its coacting
bination of a body having means therewith for connect
shoulder inwardly of the coacting shoulder on said jarring
ing to an object, a pressure actuated jarring member slid
arm for subsequent coaction in placing said bar under
ably mounted in said body, a pressure seal in sealing en
the predetermined tension.
75 gagement with the wall of the well and connected with
3,082,804
11
said body for providing a ?uid pressure barrier in the
well for sealing off the area on one side of said jarring
member from the area on the other side thereof, a latch
on said body for releasably engaging said jarring member
and releasable by a predetermined ?uid pressure differ
ential acting on said jarring member to effect a release
and longitudinal movement of said jarring member rel
12
?uid pressure differential is applied to said one of said
members.
20. A jarring apparatus, comprising a jarring tool hav
ing a pair of jarring members, each of said members hav
ing a jarring surface for jarring contact with each other,
said jarring tool having latch means for preventing the
jarring surfaces on said jarring members from contacting
each other until a predetermined tension has been de
veloped in said jarring members, a ?exible line for lower
ative to said body, means on said body and said jarring
member adapted to engage with a jarring impact for
jarring said object in the well, and means for restricting 10 ing said tool into a Well, a releasable attachment means
for releasably attaching said ?exible line to said one of
?uid ?ow between said body and said jarring member
said jarring members, connecting means on the other of
until said predetermined ?uid pressure differential is
said jarring members for connecting same to an object
reached.
in a well, means externally of said one of said jarring
19. A jarring apparatus, comprising a jarring tool hav
ing a pair of jarring members, each of said members hav 15 members for restricting ?uid pressure ?ow from the area
below said one of said jarring members to the area there
ing a jarring surface for jarring contact with each other,
above to enable a ?uid pressure differential to be de
said jarring tool having latch means for preventing the
veloped in said well, said attachment means being re
jarring surfaces on said jarring members from contacting
leasable after said connection means on said other of
each other until a predetermined tension has been de
said jarring members is connected to said object, the other
veloped in said jarring members, a ?exible line for lower
of said members being exposed to said ?uid pressure dif
ing said tool into a well, a releasable attachment means
for releasably attaching said ?exible line to said jarring
ferential acting thereacross to apply said predetermined
tension to said members to effect a release of the latch
means and a jarring contact vbetween said jarring surfaces
for connecting same to an object in a well, means exter
nally of said one of said jarring members for restricting 25 to thereby apply a jarring force to said object, and means
for restricting ?uid ?ow between said members until said
?uid pressure ?ow from the area below said one of said
?uid pressure differential is applied to said one of said
jarring members to the area thereabove to enable a fluid
tool, connection means on one of said jarring members
members.
pressure differential to be developed in said well, said
attachment being releasable after said connection means
References Cited in the ?le of this patent
is connected to said object, the other of said members 30
UNITED STATES PATENTS
being exposed to said ?uid pressure differential acting
thereacross to apply said predetermined tension to said
1,848,535
McCullough _________ __ Mar. 8, 1932
members to effect a release of the latch means and a
jarring contact between said jarring surfaces, and means
for restricting ?uid ?ow between said members until said 35
2,345,739
2,733,046
2,805,718
Fisher ______________ __ Apr. 4, 1944
Thompson ___________ __ Jan. 31, 1956
Tausch ____________ __ Sept. 10, 1957
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