US2016607A

US2016607A - Rotary jar

Info

Publication number: US2016607A
Application number: US672165A
Authority: US
Inventors: Ira J Mccullough
Original assignee: JAMES A KAMMERDINER
Current assignee: JAMES A KAMMERDINER
Priority date: 1933-05-22
Filing date: 1933-05-22
Publication date: 1935-10-08
Anticipated expiration: 1952-10-08

Description

Oct. 8, 1935. l. J. MGCULLOUGH 2,016,607

ROTARYIJAR Filed May 22, 1935 Patented Oct. 8, 1935 UNITED STATES PATENT OFFICE ROTARY JAR Calif.

Application May 22, 1933, Serial No. 672,165

9 Claims.

This invention relates to a well tool, and relatesl more particularly to a rotary jar. A general object of the invention is to provide a simple, practical and eiective jarring tool for effecting 5 a jarring action in a well bore'.

An object of the invention is to provide a jarring tool that is operable by a simple, longitudinal strain on the string of tools in which it is assembled, to impart a jarring action to an object in a well bore.

Another object of the invention is to provide a jarring tool in which the jarring action is .not reduced or dampened by fluid trapped between the jarring or impact parts.

Another object of the invention is to provide a rotatably jar that includes two open slackly linked sections and means for holding the sections against relative movement that is releasable by a heavy tensile strain on the sections. 20 Another object of the invention is to provide a novel and improved jarring tool construction including two sections slackly linked together in a manner so that iluid cannot be trapped between the impact parts when the tool is actuated. 2 Another object of the invention is to provide a jarring tool of the character mentioned including a practical and effective means vfor releasably holding the sections against relative longitudinal movement that is releasable by a heavy tensile strain on the sections and that may be adjusted to release under tensile strains of different intensities.

It is another object of the invention to provide a jarring tool of the character mentioned` in which the parts of the releasable holding means that are subjected to hard usage or wear may be easily and inexpensively replaced.

It is another ,object of the invention to provide a jarring tool of the character mentioned that does not interfere with the flow of circulation fluid through the operating string or fishing string in which the tool is connected.

Other objects and features of the invention may be better and more fully understood from the following detailed description of a typical form and application of the invention, throughout which description reference is had to the accompanying drawing, in which:

Fig. l is a central longitudinal detailed sectional view of the upper portion of thetool provided bythe invention, illustrating the parts in the latched or unactuated positions. Fig. 2 is a central longitudinal detailed sectional view of the lower portion of the tool. Fig. 3 is a fragmentary longitudinal sectional view of a portion (Cl. Z55-27) of the tool showing the parts in the tripped o-r actuated positions and illustrating the stem in elevation. Fig. 4 is a transverse detailed sectional view taken as indicated by line 4 4 on Fig. 1. Figs. 5 and 6 are transverse detailed seo- 5f slackly linked or connected together for limited relative longitudinal movement, and are adapted to be connected in an operating string or fishing string of drill pipe, or the like. In the particular arrangement of the device illustrated in the drawing, the section A is the upper section of the body, while the section B is the lower body section, it being understood that the tool may be inverted if desired. The upper section A is provided at its upper end with a sub or connecting member I0 for facilitating connection with the operating string or shing string. A socket II is provided in the upper end of the member I0 for receiving the threaded pin' I2 of a part of the string. The section A is an elongate member or structure including a tubular portion I3 for containing or housing the means C and a link portion I4 for connecting with the section B. The sub or connecting member is IIJ screw-threaded into the upper end of the tubular portion I3. The longitudinal opening I5 in the tubular portion I3 is comparatively large in diameter and terminates at its lower end in an upwardly facing shoulder I6.

The link portion I4 of the section A projects downwardly from the lower end of the tubular portion I3, and in the form of the invention being described, is integral with the portion I3. The link portion I4 of the section A has two flat parallel sides and a longitudinally elongated transverse opening thereby consisting of two spaced longitudinally extending parts I 1., and a transverse end part I8 connecting the parts I'I. The inner sides I9 of the longitudinal parts I1 are flat and parallel, while the outer sides of the parts I1 may be flush with or form continuations of the tubular portion I 3. The transverse end part I8 is 50 preferably comparatively heavy and intergral with the longitudinal parts I`I. The side parts or longitudinal parts I'I of the link portion I4 are preferably comparatively long as illustrated in Fig. 2 o 65 the drawine- The lower body section B is adapted to be connected with the fish or object to be jarred, and is provided at its lower end with suitable means for connecting with a fishing tool, or the like. In the particular embodiment of the invention illustrated in the drawing, a pin 22 is provided 0n the lower end of the section B and is threaded into a socket 23 in a connecting member` or tool. The upper end portion of the section B is in the nature of a link portion slackly connected with the link portion I4 of the section A. A vertically elongated transverse opening 24 is provided in the link portion of the section B to receive the transverse part I8 of the section A. The opening 24 has nat vertical sides adapted to cooperate with the sides of the part I8 when rotational strains are transmitted through the sections A and B. The upper or link portion of the section B has two flat parallel sides 25 substantially normal to the flat vertical sides of the opening 24. The upper end wall 23 of the opening 24 is fiat and normal to the longitudinal axis of the tool and is adapted to be struck by the upper end 20 of the part I8 when the means C is released, while the lower wall of the opening 251 is at and is adapted to be engaged by the lower end 2| of the part I8 to limit downward movement of the section A relative to the section B. The opening 24 is preferably comparatively long to provide for substantial relative longitudinal movement of the sections A and B. In accordance with the invention, the opening 24 is spaced some distance below the upper end of the section B and the sides 25 of the upper end portion of the section B are adapted to slidably cooperate with the inner walls I9 of the parts Il in the manner illustrated in Fig. 5 of the drawing.

The inner corners 21 of the parts Il and the spaced longitudinal parts of the section B may be cut away to provide substantial spaces for the free outlet of fluid so that the fluid cannot be trappedv between the linked parts and interfere with the jarring action. It will be apparent how the linked parts described above connect the sections A and B for limited longitudinal movement and operate to dependably transmit heavy rotational strains in both directions.

The linked parts of the sections A and B may be assembled in any suitable manner. In one manner of assembling the sections the upper transverse part of the section B is arranged between the side parts of the section A and the transverse part I8 is built up by welding. The part IB may be built up around a central vertical sleeve 59 and may be integrally joined with the side parts I1.

The means C is contained or housed within the tubular portion |3 of the section A and is operable to hold the sections A and B against relative longitudinal movement when they are in the contracted position where the shoulder 25 is spaced from the upper wall 26 of the opening 24, and is releasable by a heavy tensile strain on the sections to permit the face 20 to come into jarring engagement with the face 26 to impart a jarring action to the fish or object connected with the section B. The releasable holding means C includes a mandrel or stem 28 connected with the section B and extending upwardly into the opening I5 of the section A. The stem 28 projects from the upper end of the section B and slidably passes through a vertical opening 29 in the section A to extend into the Yopening I5. The stem 28 may be integral with the section B, however, in the particular case illustrated in the drawing, the stem 28 is threaded into a socket 30 in the upper end of the section B.

The releasable holding means C includes a plurality oi clutch members or latch members 3| for cooperating with the stem 28. The members 5 3| are mounted within the tubular portion I3 on a yieldable member 32. The yieldable member 32 is in the nature of a tubular block surrounding the stem 28 and resting on the shoulder I6. The member 32 is integral and is of corrugated longil0 tudinal cross section so as to be yieldable or. compressible under heavy compression strains. A plurality of longitudinally spaced annular internal grooves 33 and a multiplicity of spaced annular external grooves 34 are provided in the tubul5 lar member 32. The sets or series of

grooves

33 and 34 are longitudinally staggered or offset and are formed sufliciently deep to overlap one another. The

grooves

33 and 34 render the member 32 compressible under heavy strains. The latch 2O members 3l are elongate and are of arcuate hori- Zontal cross section. The members 3| are supported on the member 32 having their lower ends resting on the upper end of the member 32. In the particular form of the invention illustrated 25 in the drawing there are six like latch members 3|. It has been found practical to form the latch members 3| by dividing a ring or comparatively heavy tube into six equal longitudinal parts.

In accordance with the invention, the latch mezn- 30 bers 3| are formed and proportioned to have limited tilting movement so as to be shiftable into and out of holding cooperation with the stem 28. The inner and outer sides of the members 3| converge upwardly as illustrated in Fig. l of the 35 drawing so that the members may have the necessary tilting movement.

The invention provides projecting parts or teeth 35 on the latch members 3| for cooperating with or meshing with teeth 38 on the stem 28. 40 The teeth 36 on the stem 23 are formed by a plurality of spaced annular grooves 3l. The teeth 35 of the members 3| are progressively shorter from the upper ends of the members downwardly and the grooves 3l are likewise progressively shal- 45 lower from the upper end of the series of grooves downwardly to permit the proper or full meshing of the

teeth

35 and 35 when the members 3| are tilted inwardly as illustrated in Fig. l. The

teeth

35 and 36 are formed so as to cause outward 50 shifting or tilting of the members 3| when the teeth are in mesh and the sections A and B are under a tensile strain. The cooperating sides of the

teeth

35 and 35 are inclined or outwardly convergent to cause the tilting of the members 3|. 55 The teeth 36 of the stem 28 are related to the teeth 35 so that the sections A and B are in the contracted positions when the teeth are in mesh.

The means C includes a control for governing the disengagement" of the teeth 35 from the teeth 60 36 and for permitting the resetting of the tool for further actuation. A longitudinal sleeve 48 surrounds the upper portion of the stem 28 and is provided at its lower end with an annular flange 4| adapted to surround the upper end 55 portions of the latch members 3| to hold the teeth of' the members in cooperation with the teeth 33. The lower end of ange 4| is inclined downwardly and outwardly to cooperate with the upper ends of the members 3| when the tool is 70 being reset as will be subsequently described. The sleeve 40 is normally yieldingly held in the position illustrated in the drawing so that its flange 4I holds the sections 3| in cooperation with 4the stem 28. A nut 42 is screw threaded 75 into the tubular portion |3 of the section A and a helical spring 43 is arranged under compression between the nut 42 and a shoulder 44 on the sleeve 48 to normally yieldingly urge the sleeve downwardly. A stop flange 45 -on the sleeve 4D is adapted to engage the nut 42' to limit downward movement of the sleeve. A set screw 46 may be provided to lock or set the nut 42 in position. The releasable holding means C may be adjusted to release under tensile strains of different intensities by threading or adjustment of the nut 42 which adjusts the sleeve 40 in the section A. When the

teeth

35 and 36 are in mesh and the sections A and B are put under a tensile strain, the strain is transmitted from the section A to the section B through the yieldable member 32 and the members 3|. The member 32 yields under this strain and when a pre-determined strain is put on the tool the member 32 compresses sufficiently to allow the section A to move upwardly relative to the section B so that the flange 4| moves out of engagement with the members 3| and the cooperation between the inclined ends of the teeth causes the members 3| to tilt outwardly and disengage the teeth so that the section A may suddenly and forcibly move upwardly relative to the section B to bring the upper end 20 of the part |8 into jarring engagement with the face 2B. It will be apparent 1 that longitudinal adjustment oi the sleeve 4| in the section A by threading oi' the nut i2 adjusts the means C so that it may release under different tensile strains.

'Ihe invention includes means for handling circulation fluid. A central longitudinal opening 58 is provided in the member I8 and is in longitudinal alignment with a fluid passage 5| in the member on the lower end of the fishing or operating string. The stem 28 is tubular, having a central longitudinal fluid passage 52 and a wash pipe 53 is threaded into an enlargement in the upper end of the. passage 52 and is slidable in the opening 50. The wash pipe 53 is sufficiently long to extend completely through the opening 5D when the sections A and B are in the extended positions and normally projects into the opening 5| as illustrated in Fig. 1 of the drawing. Means is provided for sealing or packing about the wash pipe 53. An enlargement or socket 54 is -proivided at the upper end of the opening and carries packing 55 for sealing about the wash pipe 53. A nut or gland 56 is threaded into the socket 54 to compress the packing. A central longitudinal fluid passage 51 extends through the lower portion of the section B and a wash pipe 58 is screw-threaded into its upper end and extends upwardly through the opening 24. The sleeve 59 in the transverse part I8 freely passes the wash pipe 58. The wash pipe 58 extends upwardly through an opening 60 in the upper portion of the section B and its upper end is received in a recess in the end of the stem 28. Packing @I is provided in the lower end of the socket 38 for sealing about the wash pipe 58 and is compressed by the lower end of the stem 28 which is threaded into the socket 30.

In operation the parts of the tool are normally in the positions illustrated in Figs. 1 and 2 of the drawing. Circulation fluid may be continuously circulated downwardly through the operating string or fishing string and the tool. When it is desired to actuate the jarring tool to impart a jarring action to the fish or object connected with the section B, a heavy upward or tensile strain is put on the string. The tensile strain is transmitted from the section A to the section B through the yieldable member 32 and the latch members 3| whose teeth 35 are in mesh with the teeth 36 on the stem 28. The

memberV 32 yields under the strain to which it is `5 subjected, and when a heavy tensile strain has been put on the tool, the member 32 yields sufficiently to allow the flange 4| to move upwardly out of holding engagement with the members 3|. Upon the flange 4| moving out of cooperation 10 with the members 3|, the bevelled sides of the

teeth

35 and 36 cause the members 4| to be pivoted or tilted outwardly so that the teeth 35 are moved out of mesh with the teeth 36 and the section A is permitted to suddenly move up- 15 wardly relative to the section B Ato bring the upper end 28 of the part i8 into jarring engagement with the face 26. In practice, the heavy tensile strain required vto trip or actuate the tool stretches the fishing string or operating 20 string of drill pipe to a substantial extent, and

the resiliency of the stretched or elongated string is utilized to produce the jarring action or blow when the means C is released.

The relative movement between the sections A 25 and B upon release of the means C is not retarded or dampened by circulation fluid trapped between the jarring or impact parts. The .opening 24 through which the part moves when the tool is actuated has free communication with the well 30 bore at all times so that the fluid in the opening may freely circulate or discharge into the well bore. The releasable holdingmeans C may be readily adjusted by adjusting the threaded nut 42 which causes longitudinal adjustment of the 35 l sleeve 40 in the section A. By adjusting the sleeve 48 in this manner the tool may be made to release under tensile strains of .different intensities. The tool may be easily and quickly reset by lowering the operating string or by permitting 40 the string to settle to bring the part I8 into engagement with the lower end of the opening 28 which aligns the teeth 35 with the grooves 31. During this lowering of the section A, the inclined end of the flange 4| comes into engagement with 45,

the upper ends of the members 3| and the spring 43 is forced to yield. The inclined end of the fiange 4| insures the proper meshing of the teeth 35 with the teeth 36 and permits the upper end portions of the members 3| to pass within the 50 flange 4|. The tool is operable to transmit rotational strains in both directions, and is operable by a simple longitudinal strain to produce an effective jarring action.

Having described only a typical form and ap- 55 plication of my invention, I do not wish to be restricted to the specific form or application herein set forth, but wish to reserve to myself any variations or modifications that may appear to those skilled in the art or fall within the scope of 60 the following claims.

Having described my invention, I cl-aim:

1. A jarring tool including, two sections, each section having an open link portion, the link portions connecting the sections for limited relative longitudinal movement, a tubular portion on one section integral with its link portion, means in said tubular portion for holding the sections against relative longitudinal movement releasable by a strain on the sections, and means for conducting circulation fluid longitudinally through the sections.

2. A jarring tool including, two sections, each section including two spaced longitudinal parts, and spaced transverse parts connecting the longitudinal parts, the sections being linked together so that a transverse part of one is shiftable longitudinally between the longitudinal parts of the other, the adjacent edges of the longitudinal parts being spaced whereby the spaces between said parts of the sections are open to the exteriors of the sections, means for conducting circulation fiuid longitudinally through the sections, and means for holding the sections ag-ainst relative longitudinal movement releasable by -a strain on the sections.

3. A rotary jarring tool including, two sections, each section including two spaced longitudinal parts, and spaced transverse parts connecting the longitudinal parts, the sections being linked together so that a transverse part of one is shift-able longitudinally between the longitudinal parts of the other, one section including a tubular portion, a stem on the other section eXtending into the tubular portion, and means in the tubular portion for cooperating with the stem to hold the sections against relative longitudinal movement and releasable by a strain on the sections, the sections having ducts for conducting iluid longitudinally through them.

fi. A jarrinfj tool including, two sections, one section having an elongated transverse opening, the other section including two spaced longitudinal parts, and a transverse part connecting the longitudinal parts and extending through said opening, the transverse part being longitudinally shiftable in the opening whereby the sections are connected for relative longitudinal movement, means for conducting circulation fluid longitudinally through the sections, and means forholding the sections -against relative longitudinal movement releasable by a strain on the sections.

5. A jarring tool including, two sections, one section having an elongated transverse opening, the other section including two spaced longitudi nal parts, and a transverse part connecting the longitudinal parts and extending through said transverse opening, the transverse part being longitudinally shiftable in the opening whereby the sections are connected for relative longitudinal movement, the said opening being open at the exteriors of the sections, the transverse part having an opening, a pipe extending through said transverse opening and through the last mentioned opening to conduct uid longitudinally through. the sections, and means for holding the sections against relative longitudinal movement releasable by a strain on the sections.

6. A jarring tool including, two sections each section comprising, spaced longitudinal parts, and spaced transverse parts extending between the longitudinal parts, the sections being linked together so'that a transverse'part of one is shiftable longitudinally between the longitudinal parts of the other, means for conducting circulation fluid longitudinally through the sections, and

means for holding the sections against relative 5 longitudinal movement releasable by a longitudinal strain on the sections, a transverse Vpart of one section being operable to strike against a transverse part of the other section to provide the jarring action upon the release of the holding 1o means.

7. A jarring tool including, two sections, one section having an elongated transverse opening, the other section including two spaced longitudinal parts, and a transverse part connecting the 15 longitudinal parts and extending through said opening, the transverse part being longitudinally shiftable in the opening whereby the sections are connected for relative longitudinal movement, one section being tubular and receiving a stem on 20 the other section, and means in the tubular section for cooperating with the stem to hold the sections against relative longitudinal movement releasable from the stem by a tensile strain on the sections, said means including a tiltable latch z5 member for engaging the stem, and control means governing the engagement of the member and stem.

8. A jarring tool including, two sections, one section having an elongated transverse opening, 3.0 the other section including two spaced longitudinal parts, and a transverse part connecting the longitudinalparts and extending through said opening, the transverse part being longitudinally shiftable in the opening whereby the sections are $5 connected for relative longitudinal movement, one section having a tubular portion, a fluid conducting stem on the other section extending into the tubular portion, and means in the tubular portion for cooperating with the stem to hold the 4@ sections against relative longitudinal movement releasableV from the stem by a tensile strain on the sections.

9. A jarring tool including, two sections, one section having 4an elongated transverse opening, 5 the other section including two spaced longitudinal parts, and a transverse part connecting the longitudinal parts and extending through said opening, the transverse part being longitudinally shiftable in the opening whereby the sections are 50 connected for relative longitudinal movement, means for holding the sections against relative longitudinal movement releasable by a longitudinal strain on the sections, and means for adjusting said means to release under strains of diieru ent intensities.

IRA J. MCCULLOUGH.