US2248169A - Oil well tool - Google Patents

Description

2 Sheets-Sheet 2f P. H. GRANGER on. WELL TooL Filed. July 26. 1940 3 1 Wwf/O49 GRA/V60? July 8, 1941.

' relative movement ot the tubing and the An important obiect' ot .providean apparatus which is movable to different depths in a well casing-whilesuspended `Patented Juiy`8, 1941 t UNITED STATES PATENT OFFICE I on. wais. Toor.

Pani H. Granger, Los Angeles, Calif. -appucaun Julyze, 1940, sei-iai No. 341,697

(ci. iss-' n 1s claims,

This invention relates to oil well tools and pertains more particularly toA an apparatus which may be used for locating leaks in wel! casing,

cementing such leaks, testing formations, orior other operations where it is desirable to establish: fluid communication between a string of tubing and a localized portion of a well casing.

The principal object of. the invention is to provide a simple, effective, rugged and easily maintained apparatus for establishing fluid communication with a localized portion of the well casing. Y f e .With apparatus of this class a localized portion ofthe weil casing is sealed from the remaining pcrtionot the casing by longitudinally spaced packing means which necessarily ilt tightly against the walls of the casing. At the same time, it is necessary to move the apparatus to communication through the tubing to a localized casing'and is provided with portion of the well the tubing of iluids when it means for draining is raised inthe hole .and is further adapted to by-pass fluids past the localized zone in the casing when iluids are forced down the tubing.

. A general object oi this invention is to provide an -apparatus which will effectively seal ofi a localized portion of the well casing and yet which is at the same time readily movabley to different depths in the well casing. l

Another important object oi'the invention is to provide an apparatus oi the type described with a by-pass passage oi relatively great areaV whereby the movement of the apparatus to dii- .ierent depths in the well casing is facilitated,

Another object of the invention is to provide an apparatus ci.' the type described with imdiil'erent depths in the well, and this makes it necessary to provide some means for ily-passing fluids past the packing means during this movement. Otherwise, it would be necessary to force the iluids betweenv the casing and the tight-litting packing means, which would subject the apparatus and the casing to undue stresses.

It is further desirable to cut of! this by-pass when the packing means are located on opposite t sides' of the desired localized portion oi' the well casing so that communication to this zone only t is established with the surface through the tllb' ing on which the apparatus is carried. For this purpose the apparatus is provided with valves which are controlled from the surface through Decking means. A 'i Y It is further desirable in apparatus of this'class to drain the tubing from which the apparatus is suspended in the hole of liquids as the tubing in the apparatus is raised, to avoid raising a heavy column of liquid in the tubing, and the 'breaking down or disiinting o! the'tubingstring with the tubing in wet condition. In cementing operations it is usually necessary to displace a considerable amount of iiuid present in the tub-'- ing before the cement can bebrought to the tool.

Unless some means is provided for by-passing this displaced iluid, it is-'necessary to force it-outl through the leak in the casing which is located proved valves which are rugged in'character and positive in action.

A further object of the invention is to provide an apparatus of the class described with valve means at the opposite ends of al chamber which take advantage of the pressure within the chamber to maintain tight sealing engagement.

I accomplish the above and other objects oi my invention by providing a tool having a pair oi' vertically spaced packing members adapted for sealing engagement with the casing along with means cooperating with the packing members,-

including vertically spaced valve devices. to seal ci! a localized zonelwithin'the casing. Means is also provided iorconnection tothe tubing for ."moving the `tool to different depths and to protionby movement A weil above and valve-devices tobetween the packers.; the

.expenditure of considerable energy anaisl me'. timesdimculttogecompgn Y. this invention is to from the tubing am' u adapted te nula vide a passage having an opening located be- `tween the valve devices establishing fluid communication between the tubing and the localized zone.i The valve devices are adapted for operaof the tubing.from'the surfaceand are `movable to an open position in which'iiuid communication is established through the localizedzone and outside o! the above-mentioned passage between the c asedportions 'of the from abovermentioned through the thecased portions'o! the well above vand below the zone, The valve devices also movablento-'a closed position shutting o!! communication through thelocalized sone between thecased portions weil above 'l and below the localizedsone.l

Y Further objects and invention will vensuing eith be out lin the from.

below the localized zone andalso description or- .will. jbe there- The accompanying drawings illustrate embodiments of myinvention and referring thereto:

Fig. 1 is a partly sectional elevation of a preferred form of apparatus according to my invention; y

Fig. 2 is a section along line 2-2 in Fig. 1; Fig. 3 is a reproduction of a portion of Fig. 1 on a larger scale;

Fig. 41s a reproduction of a part of Fig. 1 onJ a larger scale illustrating the construction of my preferred form of valve mechanism in greater detail;

Fig. 5 is a transverse sectional view taken along line 5-5 in Fig. 4;

Fig. 6 is a partly sectional elevation of a modied form of the invention Fig. 7 is a partly sectional elevation of a iurther modined form of the invention:

Fig. 8 is a transverse partly sectional view of a modined form of valve member;

Fig. 9 is a longitudinal section of a portion of my apparatus illustrating an alternative arrangement for mounting the valve members;

Fig. 10 is a partly sectional elevation illustradting a further modied valve arrangement; an

Fig. 11 is a partly sectional elevational view of a portion of my device embodying a sleeve valve.

Referring to Figs. l-5 of the drawings, my

invention will be seen to comprise a device secured to or adapted to be secured to the lower endv of a string of tubing I for insertion into a well casing 2. The device is shown as comprising an outer conduit means 3 forming a vertically elongated body member which will be generally referred to as aftubular" or other member throughoutthe speciiication and claims even though it is preferably made up of a plurality of sections which may be of different diameter. The body member 3 forms a longitudinally extending chamber 4 and is provided with one or more openings at 5 and at 6 which are longitudinally spaced from one another and establish iluid communication between the inside of the chamber 4 and the inside of the ggsigg 2 which is located outwardly of the mem- For convenience in assembly and for other reasons which will appear as the rdescription ed within the lower end of the collar 1 is av tubular member 8 of reduced diameter and provided with the openings 5. The lower end of the upper section 9 is threaded into the upper end of an intermediate section II of increased diameter which is shown formed with an upper section I2 and a lower section I3' Joined at I4. A lower section I5, which may be of the saine diameter 'as the upper section 9 and which is provided with the openings 8, is shownthreadedly secured to the interior of thesection I3 and is provided with a cap Il at the lower end thereof forming the lower wall of the chamber 4.

The intermediate section I I and preferably the lower section I3 thereof is provided with an opening I1 establishing iluid communication between the inside and outside of the chamber 4 and the inside of the casing 2. Packing means such uiiexible rubber packing cups I8 and I9 are Drwlded .t loligihliirmlly moed pOitions on opposite. sides of the opening I1 and are shown facing said opening so that an increased pressure within the casing in the localized zone between the packing means will tend to force the packing cups outwardly to increase their sealing engagement with the inside'of the casing.

The packing cups I8 and I9 may be of a commercial variety which are formed about metal sleeves 2| and 22 respectivelywhich encircle the sections 9 and I5 respectively and abut against collars 23 and 24 suitably secured to the respective sections and located between the packing members. Collars 25 and 28 threadedly engaging the respective members 9 and I5 are provided for holding the packers I8 and I9 in tight engagement with the collars 23 and 24.

A vertically elongated inner tubular member 21 extends into the chamber 4 from its upper end through the collar 8 and is adapted to rotate ,with respect to said collar. The tubular member 21 is spaced from the chamber 4 throughout. its length in order that the desired fluid communication between the openings 5, 6 and I1 in the tubular body member 3 may be maintained. Although the tubular member 21 may be of the same diameter throughout its length, I prefer to make the upper portion 28 thereof which extends through the collar 8 of larger diameter than the lower portion 29 thereof which extends into the chamber 4 and is located in the passage between the openings 5, 8

and 11. The upper portion 28 is conveniently of the same diameter as the tubing I so that it may be attached thereto by meansof a cony ventional tubing collar 3|.

It is preferred to support the tubular mem-v ber 3 from the tubing I at a position adjacent the upper end of the tubular member. For that reason the tubular member is supported from the collar 8 by meansof a ange 32 threadedly engaging the lower end of the section 28 and forming the upper portion of a reducing coupling 33 for coupling the sections 28 and 29 together. Suitable means is also provided for preventing upward movement of the tubular body member 3 with respect to the tubular member 21. Such means may comprise a flanged cap member 34 secured to and closing the lower end of the member 2-1 and resting against the inside of the cap member I6 located at the lower end of the section I5.

Valve means controlled by rotation of the member 21 with respect to the body member 3 is provided within the chamber 4 intermediate the openings 5 and 8 and is adapted to open and close communication between the openings 5 and 8 through the chamber'4. In the preferred. embodiment oi' my invention as illustrated in Figs. 1-5 and as more particularly illustrated in Figs. 1, 4, and 5, the valve means is located in 4the central section I I betweenthe packers I8 and I9.

Referring to said last-mentioned ilgures' and particularlyto Figs. 4 and 5, the valve means is The members 31 and 39 are eachin the form A of partitions providing annular faces for cooperating to form a tight sealing fit with the cooperating faces of the valve members 38 and 4I. The members 38 and 4I are provided with portions 42 and 43 which extend towardfone another along the tubular member 29. The members 38 and 4I are constrained for rotation with the member 29 and arepreferably also capable of some longitudinal movement with respect to the member 29. 38 and 4I are keyed to the tubular member 29 by means of longitudinally extending keys 44 and 45. The portions 42 and 43 and the adjacent .portions of the tubular member 29 are appropriately splined for this purpose. The valve members 38 and 4i' are spring-pressed outwardly against the members 31 and 39 by means vof a compression spring 48 which is preferably of substantially the same diameter as the inside of the intermediate section ii and preferably bears against the outer edges of the members 38 and 4I.

The members31 and 39 are provided'witn valve apertures 41 and 48 which preferably take the form of arcuate slots extending about 120' about the circumference of these members. The members 38 and 4I provide means for closing or `opening the apertures 41 and 48; for opening respect to the body 3, to establish fluid communication through the chamber 4 between the openings 5 and 6 outside of the passage provided by the inner tubular member 21 which has an opening 64 providing communication between the last-mentioned passage and the portion of the chamber 4 between the va1ves, and in another rotative position of the members 21 and- 3, to break this-iiuid communication. In this last mentioned rotative position of the valves, the bypass passage between cased portions of the well` above and below the spaced packers which was present when the valves were open, is completely closed off fromrthe passage through the inner tubular member 26 at positions below the lower valve and above the upper valve. With the example illustrated, a rotation of approximately 120 will either make or break this uid communication. To enable such relative rotation, Vthe member 3 is provided with means for engaging the inner walls of the casing2 to prevent rotation of said member, said means consisting, for example, of bow springs 53 and 54 secured to said CII -To accomplishfthis, the members,

6I is in` engagement with the pin 62 the valves are open and all of the apertures are in line with one another. With the pin 6I engaging the pin Y63, as indicated in dot-dash lines at 6Ia, the

valves are closed, and communication between the openings 5 and 6 is broken.V In Fig. 5 the slot 52 is shown at 52a in dot-dash lines, corresponding to the position taken by the pin at Bla, in which position this slot is out of line'with slot 48 and the valve 361s closed.

When the valves and 36v are closed, a portion 4a of the chamber 4 located between the valves is isolated from the rest of the chamber. This chamber 4a Y is .in iiuid communication through the opening I 'I with the localized portion of theV casing 2 -located between the passage means I8 and I9. The tubular member 21 is provided with-an opening 64 located within the chamber 4a by means of which fluid communication between the localized portion of the casing and the surfacefof the ground may be had through thevtubingl I Y Although my apparatus is useful in any operation inwhich it is necessary to establish uid communioationthrough the tubing to a localized portion of the casing, for brevity it will bedescribed in connection with the locating and cementing of openings such as leaks in a Weil casing. 4The apparatus is lowered into the well casing on the end of the tubing I'. During descent Vthe valves 35 and 36 are maintained open, which stood that the passage between the packers means. in communication with the tubing only` through the valves may be considered as a pair of by-pass passages. Thus it may be considered as one by-pass passage establishing communication betweenV the .exterior of the tool above the upper packing member and the exterior of the tool between the packing members; and another by-pass passage establishing communication between the exterior of the tool below the lower packing memberand the exterior of the tool between the packing'members.

As the depurar which the reak is thought to be located is reached, the descent of the tool is stopped and the tubing I is rotated clockwise for about 180 until the pin 6I strikes the pin 63. This closes the valves 35 and 36 and places the localized zone ofthe casing between the packing through` the openings I1 and 64. An attempt may then be made to force uid down the tubmember 3, for example through the agency of the threaded collar 25 and thevoap member I 6,. and adapted to frictionally engage the walls of the casing so as `to resistlrotation of the member Y 3while Apermitting rotation'fof the member-,21.

.For ease in determining vthe position of the. Y

valves from the surface, means .is also provided for llimiting the relative rotation vof the members 21 -and 3. ySuch means may comprise a pin l6I projecting outwardly from the. member 28 adapted to engage pins 62 and 53 extending upwardly from the sleeve 8 and'limiting the relative rotation to around 180. Thus when the pin zone.

be moved up or down the hole in themanner previously described andthe above process of' f locating-leaks may be repeated.

ing I under pressure. If it is not possible to readily accomplish this, it may be assumed that there is no leak in the casing in the localized zone between .the packing means. If it is readily accomplished, a leak is indicated in this localized If Yno leak is found the apparatus may Assuming now that af leak such as indicated at Y'65' has been located between the packing Ymeans, the valves are preferably opened by ro' tating the tubing with respect tothe outer tubu- Alar member to bring the pin 62 into contact with the pin 6I and to provide a by-pass through the chamber. The desired quantity of cement slurry Lis then introduced into the upper end of the tubing and is forced downwardly.

The fluid present inf the tubing below the cement slurry flows through the chamber and out through the valves on opposite sides of the` packing means as it is displaced by the slurry. When the cement has reached the -level of the tool, and preferably when it has reached a position only slightly above the opening 64, as may be indicated by any one of a number of tell-tale devices now available on the market or deter` openings 64 and I1, then out through'the casing through the opening to cement the opening and the formation therearound. After a sufficient quantity of cement has been forced through the opening 65, the cement remaining within the tool, as within the tubular member 21, the chamber 4a and the space between the opening I1 and the lower packing member I9, may be hushed out in accordance with any one of a number of methods. y

For example, with the valves and 36 closed, the fluid flow through the-tubing I may be reversed, as by forcing liquid down through the casing 2 around the tubing I, past the packing member I8, and thence through the openings I1 and 64, and out through the tubing. This flushing procedure is disclosed in greater detail and claimed in lmy copending` application Ser.

No. 395,370, filed May 27, 1941. The upper packing member I8 will readily move away from the wall of the casing in response to excess fluid pressure from above.

After the tool has been sufficiently flushed out, the tubing may be rotated to open the valves 35 and 36 and the tool may then be moved to any desired depth or out of the hole. Movement of the tool with the valves open will also tend to clean the chamber 4a of any cement. Obviously the valves 35 and 36 may beA opened as soonas the cementing operation is completed, and the tool may bemoved to a different depth and away from the cemented opening before the fiushing operation is performed. During such movement of the tool a certain amount of initial flushingwill be accomplished. It should be noted that when the tool is removed from the hole with the valvesI open, the liquid in the tubing will drain out and' the tubing' string may be broken down in. a dry condition. Furthermore,

it is not necessary to lift a wet string to the surface. f

It should be noted that when the valves 35 and36- are closed'and the chamber 4a is under pressure, as when fluids arebeing forced down the-tubing I, the members 38 and 4I, being located onA the sides of their respective coacting' :members toward-the zone between the packers,

are. forced outwardly against the members 31 and 39 in tight sealing engagement therewith.

When the pressure within the chamber 4a is released, the spring 46 maintains the members 38 and 4I in Alight frlctional engagement with the members 31 and 39 whereby only a small force is required to rotate the member 21 with respectv to the member 3. 1

In viewoi the fact that some'clearancev-is lar v' member A63 is. further provided with -anrequired between the members 38 and `4I vand the tubular member 2,9, I prefer to provide av38 and 2|. Such gaskets may conveniently taker the form of rubber sleeves 66 and 61 which are placed under 'tension about the tubular member 29 and over the portions 42 and 43 of the members-rand 4I. In Fig. 6 I have illustrated another form of myinvention. The apparatus is shown suspended from a string of tubing 1| within a casing 12 and may comprise a vertically elongated outer \body member 13 made up' with upper, intermediate and lower tubular sections 14, 15 and 16, respectively. .Each of these sections is provided with one/ or more openings, as at 11, 18 and 19, respectively. l

`The apparatus is further provided with an inner vertically elongated member such as a tubular member 8| extending into the chamber formed by the body member I3 and comprising an -upper section 82 and a lower section 83. 'Il he upper'section 82 is connected by means of a collar 84 to the tubing 1| from which the apparatus is suspended. The lower section 83 is connected to the upper section 82 through the agency of coupling 85 located within the chamber formed by the member 13, and the upper portion of this coupling bears against the inner face of a sleeve 86 threadedly engaging the interior of the upper section 14 of the tubular vbody member.

The lower endr of the tubular member 8| is closed by means of a flanged cap which bears against a cap 88 carried by the lower end of the bottom section 16 'of the tubular body member. Thus the tubular member 8| is prevented from moving longitudinally with respect to the body member 13 by the members85 and 81 which bear voutwardly against the members 86 and 88respectivly.

It will be noted. that in this form of my invention the intermediate 'section 15 is o1' smaller diameter than theA outer sections 14 and 16. Also in the form of the invention longitudinally spaced packing means 9| and 93 are carried by the intermediate section. The packing means may be the same as illustrated in Fig. 3 and may be attached to the tool in the same manner. The packing means are located on opposite sides of the opening 18 and between the openings 11 and 19. f

' 'Ihe apparatus is further provided with valves 94 and 95 which may be constructed in the same manner as valves 35 and 36 illustrated in Figs. 1, 4 and 5 and are located on opposite sides of the opening 'I8 and between the openings 11 and `19. In this form of my invention the valves are located in the upper and lower sections 14 and and outwardly of the packing means 9| and The valve means in this form of my invention also may be spring-pressed against theirseats, but since the valves are separated by a 4considerable distance separate springs 96 and`91 are used and they may bear inwardly against sleeves 98 and 99 provided for this purpose.- The tubuopening I 0I located between the valves 94 and and adapted to establishV communication [through the opening 18 to the localized portion of the casing sealed otf' between the packing means 9| and.

|62 on 'the section 82 and cooperating upwardly .Meana such' as an outwardly extending pin 2,248,169 vextending pins |03and |03 carried by the sleeve 86, are provided for limiting relative rotation ofthe tubular member 8| and the body member 13. Bow spring means-| and |00 are provided onlthe upper and lower ends of the tubular body member for lengaging the walls of -the casing 12 for resisting rotation of this member with respect to the casing.

. Operation of this form of the invention is substantially the same as that described in connection with Fig. 1. With one rotative position oi' the tubing with respect'to the body member,

for example with the stop pin |02 engaging the pin |03, the valves 94 and 95 are opened. 'I'his -provides communication between the openings :19 and 11 for the purpose of by-passing iluids past the packing means 9| and 93 when the tool is moved longitudinally of the casing. When the tubing is rotated suleiently with respectv to the body member, for example to a position with the Fig. 6, in place of the single spring |24. Suitable means, such as bow springs |23, vsecured to the outside of the tubular body member ||0 and adapted to engage the inner wall of casing |26 is provided for resisting rotative movement of the body member ||0 with respect to the casing |26 and thereby facilitating rotative movement of the tubular member lll with respect to the body member. As with previously illustrated embodiments of the invention, the

inner tubular member is shown suspended from vthe lower end of a string of tubing |21 by ,means of a suitable coupling |20.

Suitable means such as upwardly extending pins |29 and |30 carried on the upper partition H2, and a radially extending pin |3| extending from the tubular member H4, is provided for i limiting the relative rotating movement of the stop pin |02 in engagement with the pin |04.;

the valves S4 and 95 are closed and commni, cation between the openings 11- and 19 is brokenf1 Communication can then be established through the tubing 1| and the openings |0| and 13 to only the localized zone of the .well casing located' between the packing means 0| and 93. A somewhat more compact arrangement embodying my invention is illustrated in Fig. '7.

The apparatus is shown as comprising a tubular.v

body member ||0 forming a chamber which is closed at its ends by upper and lower parti- V tions ||2 and H3. A tubular support member Ill extends through the partitions ||2 and ||3 and through the central portion of the chamber lll, being spacedi from the interior of the body body member and the inner tubular member whereby the open and closed positions of the valves may be readily obtained by rotating the tubing string |21 at the surface of the ground.

' With this-embodiment of my invention I have -shown spaced packers |32 and |33 located near the ends of thetubular body member lIII and on opposite sides of the bow springs |25. The

. packers v|32 and |33 may. be the same as demember ||0 ato provide for iiuid iiow through the chamber The tubular mem r ||3 is prevented from moving longitudinally with lrespect to the body member I|0 by means of a collar ||5 which is secured to the member III upper face oi' the partition ||2 and acap ||6 which closes the end of the tubular member and is adapted to bear upwardly against the bottom face of the lower partition H3.

The tubular member Ill is adapted for rotaand is adapted to bear downwardly against the tion with respect to the body. member ||2 and is ,provided with valve members ||1 and ||3 adapted to respectively bear upwardly and downwardly against 'the respective lower and upper vaces of the partitions ||2 and ||3. The

valve members 1 and I|0 are adapted to close apertures ||9 and |20 of the respective valve members ior'one relative rotative position of theA members ||0 and ||4 and toopen these apertures for another rotative position.

The valves may be the same/as -those described in connection withFigs. 1 6 and since they both may be the same,'only the lower valv is illustrated in detail.v Itis shown provided with an aperture |2| which is adapted toaline with the aperture |20 when the valve is-open. The valve ||8 is suitably keyed as at |22 to the tubiilar member Ill and a suitable resilient gasket such as a flexible rubber sleeve |23 is shown in sealing engagement with the valve ||3 andthe tubular member Ill.`v The valves ||1-and IIS are preferably mounted for some longitudinal movement with respect to the member III,

' in the embodiment of my invention illustrated in scribed in connection with Figs 1 and 3 and are adapted to sealingly engage the inner wall o! thecasing |26 to seal oiI a localized portion or vertically extending zone of the4 casing therebetween. Located between :the packers and preierably near the lowermost packer is an opening |34z in the wall of the member ||0 providing iluid lcommunication'between the space sealed of! between the packers andthe interior o! the chamber An opening |35 preferably located at about the same level as'the opening |33 is also provided in the tubular member ||I so that' iiuidcommunication may beestablished through the tubing |21 through the openings |35 and |34 to the localized portion df the casing located between the packers |32 and |33. This form of my invention may be operated in the same way as the forms described lin connection with Figs. 1-6. e.

Although I have shown the same types of valves Figs. 1-7, it should be understood that the valve structure maybe modified considerably without departing from the spirit and scopeA of this invention. For example, a valve member such as shown at. 2| in Fig. 5 need not be provided with an arcuate slot as'shown therein, but may com. prise onlyy a partial plate asshown at lla in Fig. 8, of suilicient sizegto close the aperture such as the'arcuate slot 48 in the partition 30; The oonp structionfoi the apparatus may be otherwise the same as illustrated in Figs. 17. l

'As previously ystated, the valve members are preferably capable of some longitudinal movement with respect tothe inner tubular member.

` In Fig. 9 the structure of the upper valve such Ias and suitable means such as 'a compression spring |24 is provided to press these valves upwardly and downwardly against the respective lower and upper faces of partitions ||2 and ||3. Ob-

v4illustra'l'fed in Figs.1 and 4 has been modiiled to provide a deiinite` limit to the longitudinal movement of the valve member with respect to the tubular member 29. For this purpose a pin Ill is shown extending through the tubularmember 23 and radially thereof to engage the lower portionof the valve 33 to prevent this valve from moving more thana short distance from the partition 31.

In this connection it maybe stated that when means such as thepin |4| is used to positively viously two springs may be used, as shown in prevent the valve from moving more than a very small distance from the partition, the spring means such as the spring 46 may be omitted. Pressure within the chamber between the valves will tend to hold them in close engagement with the partition. At the same time, the resilient gasket 56 tends to bias the valve toward the partition. Y

In the previously described examples of my invention the partitions in the tubular body member have been shown fixed thereto and the valve members have been slidably mounted on the inner tubular member. In Fig. l an arrangement is illustrated in which a tubular body member |42 is provided with a partition |43 which is keyed as at |44 to the interior of -the body member and` is slidably movable longitudinally therein. An inner tubular member |45 is shown extending through the body member |42 and through the partition |43 and is provided with a valve member |46 which is suitably secured thereto as by means of a pin |41. Suitable means such-as a flexible rubber sleeve |48 in engagement with the interior of the body member |42 and the partition |43 is provided to give a flexible uid sealbetween the partition and the body member.

A construction for a lower valve member is illustrated in Fig. and an upper valve member may be constructed in exactly the same manner. The construction of the remainder of the apparatus may be otherwise the same as that illustrated in Figs. 1-6. Spring means |45 comparable has one or more openings |53 adapted lto aline with the-opening 11a, as shown in Fig. 11.

The spring means used for frictionai engagement with the casing may be constructed in accordance with established practice. It is customary to anchor one end of the spring means to the tool and to let the other end of the spring means slide longitudinally with respect to the tool to accommodate for different diameter casings, obstructions, or the like. 'Ihus in Fig. l, the ends of the springs 53 and 54 are anchored to the collar and cap I5 which threadedly engage the body member 3. 'I'he other ends of the springs 53 and 54 are attached to collars 53h' and 54b respectively which are slidably movable longitudinally on the body 3.

In Figs. 6 and 11 the springs |05 and |06 are respectively connected to a collar |05a which is fixedly connected to the body 13 and the cap 00 which is threaded on the body. The other ends of these springs are connected to collars |05b and |05b respectively which are slidably movable lon-` gitudinally on the body 13.

In Fig. 7 the springs |25 are attached to a collar |25a which is rigidly attached to the body |0. The upper ends o1' the springs |25 are attached to a collar |25b which is slidably movable longitudinally onthe body ||0.

My invention is obviously subject to considerto the spring means 46 of Fig. 1 or 91 of Fig. 6

is provided for pressing the partition into engagement with the valve |45. The partition |43` is shown provided with an aperture |50 which is adapted to coact with a suitable aperture |5| in the valve |45 to provide an open position for the valve. The aperture |50 is closed by the member |45 upon relative rotation oi. themembersl 42 and |45.-

In all of the previously describedlmoditlcations and embodiments of my invention the partitions and valve members have had radially extending cooperating faces. Although I prefer to use this type of construction, it should be obvious that other forms of 4valves ple, the form oi' appar us illustrated inFig. 6

may be modied in the manner illustrated in Fig. 11. For brevity, only 'the upper valve structure has been illustrated in Fig. 11, and the lower j' valve structure may be modiiied accordingly.

be used. As an exam- Referring t`o Fig. -11, s ,modii'led form of the upper section 14 of the tubular body member is designated 14a and is provided with oneor more openings 11a. 'I'he opening 11a corresponds generally to the opening 11 illustrated in Fig. 6. In place of the upper valve member 54 I have provided a sleeve which is adapted to be rotated with respect to the member 14a while maintaining a close sliding t therewith. Sleeve member able modification. Hence, I do not choose to be limited to the above described examples but rather to the scope of the appended claims.

I claim:

1. A tool i'or use in combination with a well casing and a string of tubing adapted to be moved vertically within said casing, comprising: a vertically elongated inner member'adapted for connection at its upper end to the tubing string and having a passage that extends downwardly from its upper end and communicates with the exterior oi' said member through an opening spaced from said upper end; a vertically elongated outer member which extends around and rotatably engages said inner member; two vertically spaced packing members secured to said outer member -at positions respectively above and below said opening and adapted for sealing engagement with the casing and cooperating with said outer member to seal oi a vertically extending zone of the casing between said packers in communication with said opening: said outer member denning a passage outside the inner member establishing communication from a` positionoutside the tool below the lower packer and a position outside the tool above the upper packing member and communicating through said opening with the iirstmentioned passage: two valve devices controlling is provided at its upper end with a closed ange and hub member l`|5| which is secured to the inner tubular member 0I as bymeans of a'. set screw |52 and cooperates-with the packing member to seal oi! the casing. The members |50 and |5| are adapted to provide a iluid seal between the members 03 and 15. The member |00 is adapted in one rotative position of the tubular ember 83 with respect to the body member 15 to lose the opening 11a and in another rotative the opening 11a to the interior of the member 15.

communication through the'last-mentioned passage and located respectively below and above said opening, each of said valve devices comprising two-coacting valvec members secured respectively to the inner and outer members and operable to open and closed positions upon relative rotation o! said members. f

2. A tool as set forth in claim l, and further comprising means attached to said outer member for, i'rictionally engaging the walls oi' the casing to resist rotation o! said member with respect to the casing.

s. A tool se set forth in claim i, said last-mentioned passage being completely closed oi from communication `with said first-mentioned passage at positions below said lower valve device and above said upper valve device.

To provide this communication the member |-|5 75 4. A tool as set forth vin claim 1, one oi' the valve members of each of said valve devices comprising an apertured seat, the other one of the valve members of each of said valve devices com prising a member located on the side of its cooperating seat toward said zone and being adapted to close the aperture in said seat and to be forced into tight engagement with said seat in response to fluid pressure in said zone.

5. A tool for use in combination with a well casing and a string of tubing adapted to be moved vertically within said casing, comprising: a vertically elongated inner member adapted for connection at its upper end to the tubing string and having a passage that extends downwardly from its upper end and communicatesv with the exterior of said member through an opening spaced from said upper end; a vertically elongated outer member which extends around and rotatably engages said inner member, said outer member having an opening in its side providing iiuid communication between the inside of the casing and said iirst-namedopening; two vertically spaced packing members secured to said outer member at positions respectively above and below said openings and adapted for sealing engagement with the casing and cooperating with said outer member to seal oi a vertically extending zone of the casing between said packers in communication with saidopening; saidouter member defining a passageV outside the inner 1 member establishing communication from a position outside the tool below the lower packer and a position outside the tool above the upper packing member and communicating through said openings with the rst-mentioned passage; two valve devices controlling communication through the last-mentioned passage and located respectively below and abo-ve said openings, each of said valve devices comprising two coacting valve members secured respectively to the inner and outer members and operable to open and closed positions upon relative rotation of said members.

6. A tool as set forth in claim 5, and further comprising means attached to said outer member for frictionally engaging the walls of the casing to resist rotation of said member with respect to the casing.

'7. A tool as set forth in claim 5, said last-mentioned passage being completely closed off from communicationA with said yfirst-mentioned passage at positions below said lower valve device and above said upper valve device.

8. In an oil well tool for use in combination with a well casing and a string of tubing adapted to be moved vertically within said casing, the combination which comprises: a, vertically extending tool body member; two vertically spaced packing members adapted for sealing engagement with the casing and secured to said body member and cooperating with said body member to seal oif a vertically extending zone of the casing therebetween; an inner vertically elongated member adapted for connection to said tubing string and extendingvwithin said tool body member and adapted for rotary movement with respect Vto said body member, said inner member having a passage communicating with the tubing string and an opening located within said body member providing communication between said passage and said vertically extending zone in said casing; upper and lower rotary valve means associated with said tool body member and said inner vertically elongated memberl and located on vertically opposite sides of said'opening, said valve means being adapted in one relative rotamember to close said by-pass'pass-ge;

tive position of said tool body member and said inner vertically elongated member to open a bypass passage outwardly of said passage in said inner verticallyelongated member between the portions of the casing above and below said vertically extending zone and being adapted in another relative rotative position of said tool body member and said inner vertically extending 9, A tool as set forth in claim 8, said by-pass passage being completely closed off from said first-named passage at positions below said lower valve means and above said upper valvemeans.

10. In an oil well tool for use in combination with a well casing and a string of tubing adapted to be moved vertically within said casing, the combination which comprises: spaced packing members adapted for sealing engagement with the` casing; members associated with said packing members land cooperating therewith to seal off a localized vertically extending zone within the casing and defining a iiuid passage extending downwardly from the upper end of the tool and communicating with the exterior of the tool at a position between said packing members and alsoI defining a Iluid'bypass passage extending from below the lower packing member to above the upper packing member and communicating at each end with the exterior of the tool, said two passages communicating with each other only at a position between said packing members; and valve means controlling communication through said by-pass passage, located respectively below and above the position of communication thereof with the firstmenticned passage, and movable to open and closed positions,

11. In an oil well tool for use in combination with a well casing and a string of tubing'adapted to be moved vertically within said casing, the combination which comprises: two vertically spaced packing members adapted for sealing engagement with theA casing; means cooperating with said packing members to seal oir a localized zone within the casing between said packing members; means defining a uid passage extending downwardly from the upper end of the tool and communicating with the exterior of the tool at a position between said -packing members; means defining a by-pass passage separate from the rst-mentioned passage, establishing communication between the exterior of the tool above the upper packing member and -the exterior of the tool tween the packing members; means defining another by-pass passage separate from said rst-mentioned passage, establishing com'. munication between the exterior of the tool be'- low the lower packing member and the exterior of the tool between the packing members; and valve devices operable to open and close each of said by-pass passages.

12. In an oil well tool for use in' combination with awell casing and a string of tubing adapted to be moved vertically within said casing, the combination of upper and lower means spaced vertically from one another and each including .and cooperating with a packer for sealing engagement with the walls of the casing to seal off a vertically extending zone of the casing therebetween; means holding saidA upper and lower means in vertically spaced relation and having a passage communicating with the tubing and with an opening communicating with'said zone; and valve means cooperating with said upper and low- .er means and operable upon relative movement two vertically' means, to an open position providing fluid communication between said zone and the cased por- 'tion of the well above and below said zone and between said vopening and the cased portions of the well above and below said zone, said passage being completely cut oi from communication with the cased portions of the well above and below said zone when said valves are closed.v

13. In an oil well tool for use in combination with a well casing and a string of tubing adapted to be moved vertically within said casing. the combination that comprises: an outer conduit means having two vertically spaced packing members disposed outwardly thereof for sealing engagement with said casing; an inner conduit means extending within and spaced from the outer conduit means and relatively rotatable with respect thereto; two vertically spaced, transverse partitions disposed between said conduit means and secured to one of said conduit means.and

having apertures in fluid communication with vthe opening located between said packing membersand also between said valve members; and said inner conduit means having an opening located between said valve members.

14. A tool as set forth in claim 13, and further comprising. means attached to said outer conduit means for frictionally engaging the walls of the casing to resist rotation of said outer conduit member with respect to said casing.

15. An oil well tool for use in combination with a well casing and a string of tubing adapted to be `moved vertically within said casing, saidtool comprising: an inner portion including an inner tubul-ar conduit means having means at its portion; two vertically spaced packing members secured to said outer conduit means and adapted to engage said casing to seal oi a localized portion of said casing; said outer conduit means' having two openings located respectively below the lower packing member and above the upper packing member; and two vertically spaced valve devices located within said iiuid passage between said two openings and each comprising a valve member connected to said outer conduit means and constrained against rotative movement relative thereto and a member connected to said inner conduit means and constrained toy rotate therewith into closed and open positions with respect to the other valve member; said outer conduit means having another opening located between said packing members establishing fluid communication with the portion oi said fluid passage between said valve devices; and said inner conduit means having an opening located between said devices.

16. A well tool adapted to be suspended from a string oi.' tubing for movement to diiierent depths in a well casing, comprising: means defining the side walls of a longitudinally extending chamber having an opening in said side walls;

l packing means carried by said iirst-named means upper end for connection to the Itubing string v in communicating relation therewith; an outer portion supported on said inner portion in such manner as to permit relative rotation of said inner portion with respect to said outer portion, and including an outer tubular conduit means of less diameter than said casing surrounding and spaced from said inner conduit means to provide a iiuid passage therebetween; means on said outer portion adapted to rictionaliyv engage said casing in such manner as to permit verftical' movement of said tool within said casing and to resist rotative movement of said outer and located at longitudinally spaced positions above and below said opening and adapted to seal off a portion of said well casing therebetween; apertured members carried by said means and forming upper and lower end walls of said chamber, said apertures being adapted to provide uid communication through said chamber between portions of the casing above and below said packing means; another member extending into said chamber through one oi said apertured members and adapted for connection with said string oi' i tubing to provide uid communication from said tubing to the interior o f said chamber and adapted for rotation with respect to said means; and other apertured members respectively springpressed upwardly against the inner face of the upper oneV of said first-named apertured niembers and downwardly against the inner face of the lower one of said first-named apertured members and mounted for rotation with said n other member, said apertured members cooperating in one rotative position to provide said fluid 1 communication through said chamber between said portions of the casing above and below said packing means and vcooperating in another position to close said apertures and the ends of said chamber.` l t 17. A tool as set forth in claim 16, and further comprising bow spring means secured to said mst-named means for frictionally engaging Athe inner walls-oi.' said casing to resist rotation of said first-named means with respect to said casing. I

- PAUL H. GRANGER.

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