US2121051A - Cement retainer - Google Patents

Description

June 21, 1938. y

T. M. RAGAN ET AL CEMENT RETAINER Filed July 14, 1937 3 Sheets-Sheet 1 THoMAs M RAGA/v CLA EEA/cs E. EUR 'r ATTORNEY June 21, 1938.

r. M. RAGAN ET AL V CEMENT RETAINER Filed July' 14, 1937 '3 Sheets-Sheet 2 y THoMAs M RAGA/v CLARE/vcr E 231/497 @ca/UQ TToRNEY June 21,1938. T. M. RAGAN ET AL 2,121,051

CEMENT RETAINER 4Filed .July 14, 1937 s sheets-sheet a F n.8. F M9.

INVENTOR. Wvo/1A s M EA 6A N 192A .e5/vc: E. Bue r TTORNEY .Y

Patented June 2l, .1938

.. UNirED'ps'rAT'Es PATENT OFFICE artrosi CEMENT RETAINER.

` Thomas M.'Bagan and Clarence E. Burt, Los Angeles, Calif., assignors to Baker Oli Tools. Inc., Huntington Park, Calif.. a corporation of California application July 14, isst, serial No. isaszz 19 claims'. l(o1. 16s-713) r j This application is al continuation in .part of -our pending application entitled "Cement re-I tainer.' iiledMarch 26, v1935, and bearing, Serial n No. 13,063. l 5 The 'invention relates to appliances commonly known ascement retainers which are utilized in packing ofi. cementingr and repressuring operations in deep oil wells.

It is the principal object of the present in.-

vention to provide an improved tool of the charactenreferred to which may be safely and properly run-in and set at any desired point in thel casing oi' a deep well and resistdislodgmentbypressures either -above orbelow it; 'theappara- 1l tus'being utilized in cementing operations --to cement oi! a water formation at a predetermined level or form a cement seal and reinforcement lbetween the well casing and the bore throughout the entire length oi' the casing. 'I'he tool is also capable of eilicient use in packing oit or bridging the well casing' at any desired point therealong'for purposes such as packing-oil` high .pressure gassa'nds below the oil strata. i

' In general, the device consists of a valved hol- `low packer which may be run in thehole at the lower end ofa'string' `of tubing. This packer is fitted with operatlveslips for firmly anchoring it to the surrounding casing so` that it will resist dislodgement either from pressures above or presa0 sures below. The packeris iltted with an expansible packing or sealing element for sealing off' the space between the exterior ofl the device and thecasing wall.v The slips br anchoring means.

. and the packing elementare operated by i'luid a5 pressure and by manipulation of vlthe running-in tubing at the derrick iloor.

In cementing operations, the tubing method may be practiced, that is, the cement slurry is' pumped downwardly through .the running-in tub- 40 In! and the-packer into the space below the packer and` back up around the casing to form aseal. The cement slurry .is prevented from re-' turning into the packer and casing above 'the same by a back pressure valve carried bythe.

packer. As this packer orcement retainer can Ibe set at any desiredv point -in .the casing after the latter is in place, the'A tooll is capable of use in shutting ou water at any'.point along 4the well. The device may also be used as a bridge Plug to bridge oir the interior of the casing at any desired point. This permits clementing` operations to be carried on above the devicel as is desirable in some instances. '.The device likewise maybe used purely as a packer to seal ci! the interior oi the casing at any predetermined point above bottom. This enables iti to bevemplcpwedv to shut of! high pressure gas below the producing sands.

'I'he invention is exempliiled in the following description and 4illustrated by way of example in the accompanying drawings in which: y Fig. l is a longitudinal sectional view vthrough a portion of a well casingand disclosing one form of our improved .device positioned therein with the parts in the positions they assume when the device is being run-in in the casing. Fig. 2 is a view similar to Fig. 1 but disclosing one set of slips in tripped position.

Fig. 3 is a perspective view of the slip sleeve. Fig. 4 is a perspective view of one o f the slips.-

Fig. 5 is a view similar to Fig'. 2 with the exceptlon that all 'of the slips are shown in tripped position.

therein with the parts inthe position they assume when the device i'sbeing run-in inthe casing.

Fig. 9 is a view similar to Fig. 8 but disclosing one .set of slips in tripped position.v Fig. 10 is a view similar to Fig. 9 but disclosing thev device as it appears when completely set in position. 1

' Referring tothexaccompanying drawings, (par- .v ticularly to Figs. l to 7 inclusive). I0 indicates a packer 'or what' is commonly known. as a cement retainer. 'I'his device isgener'ally cylindrical lin cross. section and of an overall external diameteri just slightly less, when its parts are in unset position, than the internal diameter of the The packer or cement-retainer I0 includes'an elongated hollow cylindrical body II, the lower end of which is formed with a concentric main circulating port. I2 surrounded by a valve seat I4. Cooperating with .this valve seat to control the ow of fluid upwardly into the body II from below the same is a .downwardly opening back pressure valve I5 of` the poppet type. 'Ihis valve is iltted with a valve stem I6 which extends vertically upward into the' body I I and is reciprocably mounted in a guide I'I centrally of a spider I8 formed integrally with or' secured within the body. I I. An expansionspring I8 is arranged bewell 'casing into which it' is to be run and set.

' seat 28 to receive a ball trip valve 21 as shown in Fig. 2. Depending from the lower end of the sleeve valve 24 are spaced legs 23 which connect 'the sleeve valve .to a circular trunnion 23 which Vthe main circulating port tween the 'guide'v I1 and an enlarged head Ila exceeds the pressure in the casing below the packer I0.

It will be noticed that the body I I is hollow and is formed. with a lower bore 20 and an upper bore 2|. These two are connected by an intermediate bore 22 which is reduced in diameter with respect to the upper and lower bores 2l and 20. .A bridging valve seat 23 is formed at the junction between the upper bore' 2| and the intermediate bore 22, the` purpose of this seat will be hereinafter described.

Reciprocably mounted in the intermediate bore 22 is a sleeve valve 24 -which has a passageway 25 formed co-axially therethrough.' At its upper end the sleeve valve 24 is formed with a trip valve l is connected to the head Ita by means of a shear pin` 30. v v

vDue to the connection between the sleeve valve 24. and the valve stem I3, the valve spring I3 constantly tends to maintain the sleeve valve 24 in its uppermost position. When the packer is assembled for running-in, it is desirable to hold the -valve I5y open. so that fluid may pass freely upwardly through the-body II. To maintain the valve in this'open position'weprovide a stop pin 3i which is secured in the body II andA against t the casing, it may be moved up and down therein ing ring 36 is connected to the body I by shear without causing a swabbing'action.

In the runningin position the sleeve valve 24 covers a port 32-Yf'ormed through the wall of the body'II and which extends from the intermedi--` `ate bore 22 to a point between the exterior of other suitable-pliable materiala'nd is anchored at its lower end to a flxed ring' 34.which is bolted or otherwise secured to an annular .flange 35 `cirl eumscribing the lowerv end ofthe body I-I. The upper end of the packer sleeve 33 is anchored to` a sliding ring 38 slidably .fitting the exterior of the body Il.. In running-in condition, the slid'- pin 31. y

In operation it is intended that when the sleeve valve 24 uncovers'the port 32, as willbe described, that fluid'unde'r presure'be directed through the port 32'to between the exterior of the body II- and the interior of the packer sleeve 33, causing ,expansion of the latter.' (We have found in lacmalpractice that by`creating -this pressure be# tween' the packer sleeve and the body, that' the packer sleeve will rst expand 'into 'contact with the weil casing and then, ldue to compression, it

will elongate. This elongating movement is lsuillcient to shear .they pin 31 vand cause thel slid- 70..

- movement of this sliding ring :36 to operate a por- 'tionofthesetting mechanism of the tool, as will lng ring 36 to move upwardly. We use this be described."

Referring particularly to Figs. 1 to 4 inclusive, it'will be seen that` above thepackersleeve 33 the `2,1'21,o51` Y' r bodyll is provided with-a slip sleeve 33'. This slip sleeve `is bored so -thatit i's lcapable of reciprocation on the exterior surface of the body- I I.

The exterior of the slip` sleeve 33 is formed with a plurality of vertically arranged slip sockets 3.3 which are spaced equal distances apart about the periphery ofv the slip sleeve 38. There are two sets of these sockets; one set to receive what we I with two parallel surfaces arranged one above' the other andl which are inclined with respect to the vertical 'axis of the slip sleeve. The inner surfaces of adjacent sockets are oppositely inclined so that the up-pressure and down-pressure slips will be arranged alternately about the slip sleeve 38. Each socket 39 'is fitted with a slip 40.

In the present instance there are three up-pres'- sure slips and three down-pressure slips, there ybeing .six sockets formed in the slip sleeve 38. It is to be understood, however, that we may provide a greater or lesser number of slips if we so desire.

The inner surface ofeach slip 40 is formed with parallel inclined surfaces which Tcoincidev with and are complementa] to the inner vsurface v.of its socket so that relative` vertical movement between the slips and the slip sleeve 38 will result in radial movement of the slips.

- It win be noticed that at the junctions between'l the inclined surfaces of the slip socket, there is a lateral shoulder which coincides with a similar lateral shoulder between the inclined surfaces of the slip fitting the socket. Each socket isformed witha keyway 33a which is engaged by a key 40a formed on the slip. l An expansion spring 4I is arranged in each socket and it abuis against the end of the'keyway v39a. attone end and against the lateral shoulderon the slip 40 at the other end sov that whenlthe'slip' is detached from the.

` slip sleeve 33, the spring 4I will move the slip relative to the slip sleeve 33 and consequently cause 'the slip to move radially outward.

In the case ofthe down-pressure slips which we have indicated at-A, the springs 4I will move the slips upwardly relative to the slip sleeve 33 andl in the case of the up.pressure slips B, the

springs 4I will move the slips downwardly relativeto the slip sleeve' 33. This'movement of the slips causes them to move radially outwardand into engagement with the casing.

Referring to Fig. 1 where the parts are shown in the position which they assume when the device is run-in to the casing, it will be noticed that the slips are arranged in their innermost position and that the down-pressureslips are secured to the slip sleeve 38 by ,a shear pin 42 while the uppressure slips B are secured to the slipA sleeve 38 by shear pins 43. It will be noticed that the up-` pressure slips Bfare 'each secured by two shear pins 4 3, while each'down-pressure slip is secured to the slip ,sleeve by a s'ingleshear-pin 42. It will I .sliplsleeveji is formed with an annular. groove casing. the upper end of the upper bore 2l is 4l which reeives a spring laten ring u. 'rms latch ringis adapted to engage annular serrations 41 formed .about the exterior surfa'ce of the body lI I to latch the sleeve 38 in positionv on the 4body I I when the tool has been run in the casing j and set.

For the purpose of running the tool into the formed with a left-hand female thread to re. ceive the left-hand male thread 4l formed on the lower end of running-in tubing 43. The purpose of the left-hand thread is to enable the tubing 49 to be unscrewed from Athe body I,I after the the valve I5 is open, 'the device 'can be 'moved up and down in the casing without causing a swabtool has been tripped and set in the casing In operation of the device, it is constructed and assembled as shown in Fig. l. In thisfcondition the valve I5 will be unseated. the two sets of slips A and B will be in their innermost position, and the packer sleeve 33 will be fully contracted. The tool is' then threaded on the" lowei` end of the running-in tubing v49 and lowered into the casing. It is obvious that due to the'fact that This iluid pressure, however",V is insuillcientto shear the pin'30 which connects the sleeve valve 24 to the enlarged head Ita of the valve stem I6.

The yiluid pressure passing through the port 32 causes the packer sleeve 33,-to expand, as illustrated in Fig. 2, and thereafter compresses the sleeve, whichcauses it to elongate and, in so dointo engagement with the casing.-

ing, it. shears the pin 31 which connects the slidvi'ngcollar 36 -to the body I I and moves the slidof tubing 43..moving the body II upwardlyrelative to the slip sleeve 331 and the slips. This movement is continued until the upper -end of the sliding ring 33 abuts against the lower end vof the slipsleeve 33 and is further continuedso 5 "as to compress the packer sleeve 33 intothecondition shown in Fig. 6. .forming a complete watertight. seal between the "body II vand the casing. This upward .pull will likewise .to some extent force the up-pressure slipsinto firm gripping 10 contact withthe wall of the casing. -After the packer sleeve 33 has been fully compressed, the latch ring 43 of the slip sleeve 3l will engage one of the latch grooves in thehody 'II and maintain the partsin setcondition, as il- 15 lustrated in. Fig. 6.v Thereafter pump pressure is againrbu-ilt up in the interior ofthe body II through the running-in tubing y49. This fluid pressure is built upsufilciently to shear the pin 30 which connects the sleeve valve to the head zo of the valve stem Ita.. In so shearing this pin,

-the fsleeve valve 24 drops to anineffective posilower bore 20 of the bodyl II to maintain the sleeve valve 24 in an ineffective position. e It is obvious fromthe previous description and from the drawings that anyup-pressure built up in the 4easing below the retainer or packer will .5

tend to more' tightly press the 'up-pressure slips into contact withthe casing due to the inclined surfaces oi'l vthe -slip sockets. It is likewise ap-l parent that any considerable pressures built up in the casing above the packer'or retainer will j ytend to. more tightly rpress `the down-pressure slips into contact with the-casing. Therefore, the

ing collar 36Aupwardly. The lsliding'collar 38 is moved upwardly a suilicient distance and with suillcient force to engage the lower ends of the down slips A and shear the pins 42. The minute that these pins 42 are sheared, the springs 4I ofthe down slips A move the slips' upwardly with respect to the slip sleeve 33. This movement of the. slips causes-them to move'radially outward The pump pressure above. the valve'- 21 is then relieved and a portion of the weight ofthe run-l ning-in' tubing 43 is permitted to vbear on the upper end of the body-II. 'I'his moves 'the body I I and slip sleeve 38 downwardlyv relative t'o the down slips A, consequently moving the slips A outwardly into a firm gripping contact with' the casing, when the slip A stops moving downwardly, relative to the slip sleeve '33. During this movement, an upper annular ilange 53 which cirengage the upper ends of theup-pressure slips B. This engagement will tend to move the uppressure slips B downwardly relative to the slip sleeve -33 shearing the pins 43. The moment that these pins are sheared. the springs 4I act to move theup-pressure slips downwardly relative to the slip sleeve 38 which causes them-to move radially outward into .engagement with the casing.

As soon as the set oi' up pressureslips B ere tripped, a strain is taken on the rimning-in string cumscribes the upper end of the body II will l' -pleted, the running-lin tubing 43 may be discon'- als nected from the body I I due to the left-hand packer will resist ydislodgernent either from pressures above orv pressures below. It will be noticed 'thatthe down-'pressure slips are provided with 5 downwardly extending wickers and that the uppressure slips are provided with upwardly directed Wichers for gripping purposes.

The device is then ready for cementing operations and cement may then. be pumped downwardly throughthe running-in tubing 43, thence through the body I Lopening the valve It and discharging into thecasing below the packer Il. In most instancesjthecasing vis perforated below the packer IIIso that the cement may discharge 55 outwardly through these perforations and upwardly through the casing to-eifect a seal bepacker a4 circulating-jar or joint of any 4preferred 70 typev If forany reason it is desired to make the device a bridgel plug so as to prevent the passage of fluid either upwardly through the packer or downwardly therethrough. abridging ball Il is 1g provided. "I'his ball may be'dropped through the I running-in tubing ,4.8 and it will seat on the bridging valve seat 23. 'Ihis will prevent fluid from being pumped downwardly through the body il and the back pressure valve I will prevent fluid from passing upwardly through the body I l Referring to the second embodiment of our inf vention and particularly to Figs. 8 to 10 inclusive seat the valve lia on the seat Ila, thereby closing the main circulating port I2a. It is obvious, however, that the valve lia when seated, may be opened by fluid pressure from within the body .when the same exceeds the pressure in the casing below the valve. I

It will be noticed that the body Ila is' hollow 'and is formed with a lower bore 20a and an upper bore 2Ia.

'I'hese two boresare connected by an intermediate chamber 22a. A bridging valve seat 23a. is formed in the upper bore 2Ia.' the purpose of which seat is the same as described in connection with the form of the device shown in Figs. l. to 'l inclusive.

Mounted in the bore 20a is a hollow sleeve 24a which has a trip valve seat 26a formed interiorly thereof to receive a ball tripvalve 21a as shown in Fig. 9." Extending upwardly from the upper end of the sleeve 24a is a. lug 28d which engages the valve lia to hold the same in open position as shown in Fig. 8. The sleeve 24a is held in position by a shear pin 30a. When the packer is assembled for running in, it is desirableto hold the valve I5a open so that uid may pass freely upwardly through the body lia. It is to maintain the valve in this open position that we provide4 the sleeve 21a which is secured in the body I la by the'y shear pin 30a so that the lug 28a will preventthe valve lia from closing so that when the plug is run-in in the casing, it may be moved up and down therein without causing a swabbing action. I

A packer sleeve'33a is provided and is formed of rubber or any other .suitable pliable material l 'connecting the lower cone 34a to'the body than connecting the upper cone 36a to the body so that a lesser, pressure is required to release the upper cone than the lower one;

-In operation it is intended that fluid under pressure be directed throughv ports .32a to between the exterior oi' the' body- .l la and the interior of the packer sleeve 33a, causing expansiony of the latter. As before stated, we 4have found in actual practice' that by creating this pressure between the packer sleeve and the body. that the packer sleeve will'rst expand into contact with the casing whereupon its elongating movement' is suilicient to shear the pins of the upper cone 31 and cause the same to move upwhich receives a spring latch 48a.

wardly.' We use this movement oi' this upper cone 36a to release an upper set of segmented slips la and move them into contact with the well casing. The set of slips Iaare the up-pressure slips.

The co-acting surfaces of the slips la andthe cone 36a are such that upward movement of the latter relative to the slips will move the same outwardly. It will be noticed that the -slips are connected to the cone by shear pins 31e and to the body Ila by shear pins 31d. When the cone 36a commences to move upwardlyalong the body due to elongation of the packer sleeve Ila the pins 31a, 31e and 31d are sheared so that the cone will move the slips t set position.

Mounted in a similar manner on the lower cone 31a is a set of "downfpressure" slips 2a. These slips and cone haveco-acting cone faces disposed so that upward movement at the body Ila and, slips 2a relative to the cone a will disrupt the shear pin connections and set the slips 2a. l

Referring to Fig. 8 where the parts are shown in the position which they assume when 'the device is run-in to the casing. it will be noticed sition so that ample clearance in the casing will be provided. y

Itwill be noticed that the upper cone 38a is formed with an interiorv annular groove "a 'I'his latch is adapted to engage annular serratlons 41a formed about the exterior surface of the body Ha to latch the cone 36a in position on the body Ila when the tool has been run inthe casing and set.

For the purposeof running the tool into the vus' ceive the left-hand male thread 48a formed on the lower end of running-in tubing 49a. The

purpose of the left-hand thread is to enable the tubing 49a to be unscrewed from the body Ila after the tool has been tripped and set in the casing.

In operation of the device shown in Figs. 8 to 10 inclusive, it is constructed `and assembled as shown in Fig'. 8. In this condition the valve Ila will be unseated, the two'sets of slips la and 1a will be in their innermost position, and the packer sleevel 33a will be fully contracted. 'I'he tool is then threaded on the lower end of the runningin tubing 49a and lowered into'the casing. It is obvious that due to the fact that the valve IIa is open, the device can be moved up and down in the casing without causing a swabbing action.

.When the device has beenv positioned at the desired point, a trip ball valve 21a Isdropped through the tubing 49a and it will nd its seat on the seat 26a on the` sleeve 24a..` vFluid pressure is thenvcreated in the tubing 49a. and in the -interior of the .body of body Ila above the sleeve 24a. This iluid pressure, however, is insumcient to shear thepin 30a which connects the sleeve 24a to Athe body Ha. y

The fluid pressure passing through the ports Ila causes the paclrcr sleeve Ila to expand. as illustrated in Fig. 9,'and thereafter compresses the sleeve, which causes it to elongate and, in. so doing, it shears the pins lla which connect the slid- 2,121,051' radially outward 4int-o engagement with' the The pump pressure above the valve ,Hai is then relieved and a strain is taken on the running-in tubing 49a which moves ythe body I'Ia and cone a upwardly relative to the up slips ia, conse- Aqueutly moving the slips la outwardly into a firm gripping contact with the casing.

. During this movement'of the body the lower cone 'lla and slips 2d will-move upwardly with tliebody compressing the packer sleeve 33a into v sealing condition against the casing until it will compress nov further, then the pin 31a will shear and an annular shoulder 53a which circumscribes the body ila will engage the lower ends of the down-pressure slips 2a. This engagement will move the slips 2a upwardly shearing the -pins `llc and-3'|d'. When these pins are sheared, continued upward movemento! the body lla will move the slips radially outward into set engagement with the casing. i l

After the packer sleeve 33a has been fully compressedand the slips ilrmly set, the latchl lring Ila-oi the conella will. engage one .of the latch grooves in the body I la and maintain the .parts in set condition, as illustrated in Fig. 10.

Thereafter pump pressure is lagain built up in the interior of the body Ila through the vrunning-in tubing 48a. 'I'his iluld pressure is built up suinciently to shear the pin 30a which connects the sleeve to the body'. I la. f In so shearing thislpin.

the sleeve 24a drops from the ,body Ila and the valve lia is free to seat.y

It is obvious from theprevious description and from the,drawings that any tip-pressure built up in the casing below the retainer or packer willl tend to Amore tightly press theup-pressure slips into contact with the` casing due to the inclined surfaces of the slip sockets. It is likewise --apparent that any considerable pressures built up in the casing above the .packer or retainer will tend to more tightly press the down-pressure slips into contact with the casing. Therefore, the

packer will resist dislodgement either from pres-j sures aboveor pressures below. It will be noticed thatlthedown-pressure slips are provided with v downwardly extending wickers and that the uppressure `slipsare provided with upwardly direct s ed wickers for gripping purposes.

The device` is.- thenready for cementingloperations and cement may then be pumped downwardly through the running-in tubing "a, thence through the body lia, opening the valve lla' and discharging into the casing below the packer Ilia. Alter the cementing operations have been completed. the back pressure ofthe cement will close the valve ila to prevent the cement from pasing upwardly `into the body Ila and into the casing above the body.

Alter the cementing operation has `been completed, the running-in tubing a may be disconnected from the body iv la dueto the left-hand screw connection between the two. The runningin tubing may then be pulled from the hole.

We prefer to use in connection with thisH packer a circulating Jar orjoint o! any' preferred type.

If for any reason it is desired to make the device a bridge plug so as to prevent the passage of huid either upwardly through the s packer 4or downwardly therethrough, a bridging ball Ila is provided. This bail may be dropped through the running-in tubing a andlt will seat on the bridging valve .seat 23a. This will prevent fluid from being-"pumped downwardly throughfthe body lia and the back pressure valve ila will prevent fiuidirom pasing upwardly through the body lia.

Ilrorn the foregoing itis obvious that we have.

provided a cement retainer which will resist dislodgement either'by pressures above it orby pres- ,sures below it. It is further pointed out thatthe device may not only be used in various kinds of cementing operations but, may likewise lbe used as a bridge plug. l

It should be pointed outithat the device rmay brought about'by selecting an' exhausted well which taps the oil sandsto be repressured. Our tool is then run into the casing of this well and set in the same manner as previously described.A

herein` in connection with the cementing operatior.. The packer is positioned .lust abovethe perforated section of the casing. 'Gas under high pressure'is then forced downwardly through the running-in tubing so that it will discharge through the port by opening the back pressure valve. This will raisethe pressure in the oil vsands and drive out additional oil into adjacent wells from' whence it may be pumped to the'sur'-- face.

While we 4 oi our invention, it Kis to be understood that various changes may be made therein by those skilled lin the art without departing from the spirit or the invention as deilncdl in. the appended claims.

Having thus described ourinvention. what we claim andl desire to secure by Letters Patent is: l; An apparatus of the claracter described comprising a hollow member adapted'to be secured' to the l'ower end of a string of tubing and lowered into a well casing. slips mounted on said necting said slips to said member and lmaintaining them in an inefllective position. a packing sleeve mounted on said member` and capable of being hydraulically actuated to release said means and thereby releasesaid slips so that they may y move to an eii'ective position.

2. Anapparatusjof the character described comprising a hollow member to be secured to the lower end of a -stringof tubing andslips mounted have disclosed the preferred .form

. l 10 also be used in repressuring oil sands. This is 'memben means capable of being released conon said-member',- coperating means onthe slips andmember whereby relative axial movement be-` tween the slips and said member will cause said slips to moveradlally outward. means capable of being released connecting said slips'ito said member and maintaining them in an ineffective position,.a packer member mounted on said member and capable of being hydraulically actuated tol v release said means and release said slips to permit them to move axially relative to said member to an effective position.

3. An apparatus of the character described comprising a hollow member to be secured to the lower end of a string of tubing, slips mounted on said member, cooperative means on the slips and member whereby relative axial movement between the slips and said member will move said slipsA radially outward, shearing means capable ofprising a member to be detachably connected to the lower end of a string of tubing, means carried by said member and operative to secure said member toa well casing, a packing sleeve surrounding said member and capable of elongation when iiuid pressure is created between it andsaid member, said member being hollow whereby fluid discharged therein through said tube may pass downwardly through said member, said member having a port formed therein to direct-duid be-A 5. An apparatus of the character described` comprising a hollow member to' be connected to the lower end of a string of tubing, a ist set of slips mountedbn said member, a second set of slips mounted on said member, cooperative means between said slips and on said member whereby relative axial movement vbetween said member and said slips will move said slips-radially outward, shear means connecting said slips 'i comprising a hollow cylindrical member adap 12. An apparatus oi' the character described 75 to said member in ineffective positions, a hydraulically actuated packing sleeve onsaid. mem- 'ber operative to' shear said means ofthe iirst set of slips so that they may move to an eiective position, and means operative upon subsequent endwise movement of said member to` shear the shear means of the second named slips to relase the same.

6. inA apparatus .of the character described comprising a hollow member adapted to be detachably connected to the lower end of a string` of tubing, a -rst set of slips mounted on said member and-a second set of slips mounted on said member, spring means associated with said means and said Amember and constantly tending tomove said slips axially'relative to said member, co-l operative mean's on said slips and said member causing said slips to move radially outward upon Irelative movement between the same and said member. shear means connecting said slips to said member, a packing sleeve mounted on said member capableof being hydraulically actuated Y to shear said shear means of the rst s et of slips,

and means on said member and operative upon endwise movement of said member subsequent to theshearing of the shear means onthe first set of slips to engage the second set of -slips and shear the shear means thereof t5 release the same. 7. An apparatus of the character described comprising a hollow member to be connected to the lower end of a string of tubing, ailrst set of slips mounted on said member, a second set of slips mounted on said member, cooperative :means between said slips and on said member whereby relative axial movement between said'member,

and said slips will move said slips radially ioutward, shear means connecting said slips tosaid `member in ineiective positions, a packing member adapted to be elongated by hydraulic pressure and thereby operative to shear said means of the mst set of slips so that they maymove to an eil'ective position and means operative upon subsequent movement of said member downwardly to shear the shear means of the lsecond named slips to release the same, the lower end of said member being i'ormed with a valve port,-a valve cooperating with said port to close the same, means normally maintaining said valve inf-open position and hydraulically actuated means for Vrendering said means inetrective.

8. Anapparatus of the character descri ed to be connected at its upperV end to the lower end of a string of tubing and-lowered thereby into a string of well casing, a setof .slips at, the exterior of said member, coinciding angular faces on said :slips .andmember whereby relative axial 'movement between said member and vslips will move said slips radially outward into engagement with the casing, means for detachably connecting said slips 'to the vmember to maintain the slips in ineiective position, a hydraulically actuated packing sleeve for detaching said slips from the 'membespring means associated with the slips and member constantly tending to' cause relative axiaLmovement between the slips and `member whereby relative axial movement between said member 'and slips will move said slips radially outward into engagement with the, cas'- "ing, means for detachably connecting said slips to the member 'to maintainthefsli'ps in ineffective position, a hydraulically4 actuated packing sleeve for detachingsaid vslips from the member, spring means associated withthe slips and member constantly tending to, cause relative axial movement between the slips and said member thereby moving said slips radially outward into engagement with the casing,and means for subsequently expanding said-packingmeans to packing position and latching it in such position, said packing means being expanded into packing `engagement with the'intei'lor of the well casing by upward'movement of said member subsequent to the releasing of said slips.

10. A device of the character described comprising a body adapted to be connected to the p sleeve and slips for moving the latter outwardly when they are detached from the'sleeve, a packer sleeve surroundingthe body and adapted to expand andelongate when the iluid pressure'is built up Abetween itand the body, said packer sleeve and slips vbeing soA relatively associated that upon elongation of the packer sleeve it will detach said slips from the slip sleeve, said packer sleeve being .capable of thereafter being axially'compressed by upward movement of the body, said upward movement also detaching said slip sleeve from the body and forcing said slips into g/ripping engagement with the casing. f y

11; .Anl apparatus of the character described comprising. a hollow body adapted tov be detachably :secured to the lower end of a string of tubing and lowered into a well casing, segmental comprising a lhollow body to be secured to the ward, a longitudinally expansible member' mounted on said body and capable of being expanded by iiuid pressure built up' in the body to cause relative axial movement between the slips and the cone.

' comprising a hollow 13. An apparatus ofthe character described comprising a hollow body to be detachabhr secured to the lower end of a string of tubing, segmental slips mounted on said body, a cone mounted on the body, cooperative cone faces on the'slips and cone whereby relative axial movement between the slips and said cone will move said slips radially outward, ble of being sheared connecting said slips to said bodyand maintaining them in an ineffective position, a sleeve mounted on said body and capable oi' being elongated by hydraulic pressure built up in said body, said sleeve being so associated with said slips and vcone that elongation thereof will act to cause relative axial movement between the slips and cone and shear said shear means.

14. An apparatus of the character described body to be detachably connected to the lower end of a string of tubing, a ilrst set of slipsv mounted on said body, a second set of slips mounted on said body, two cones on,

the body and associated withsaid sets of'slips whereby relative axial movement between said cones .and said slips will move said slips radially outward, shear means connecting said slips to said body in ineffective positions, a hydraulically actuated packing sleeve on said body and connected with one of .said cones and operative upon fluid pressure being built up therein to move the said cone relativeto the first set of slips and shear said means of Ithe rst set of slips and move the sameto an eilective position, and means operative upon subsequent said body to move the second set of slips axially endwise movement of to shear the shear means of the second named slips and move them `to an effective position.

15. An apparatus of the character described comprising a hollow body adapted to be detachably connected. to the lower end of a string of tubing, a first set o! slips mounted on said body and a second: set of slips mounted on said body,`

a iirst and a second cone on said. body and associated with said slips to move the same radially outward upon relative movement between the cones and said slips, shear means connecting said cones to said body, shear means detachably.

connecting said slips to said cones and body, a packing sleeve mounted on said body and connected with said cones and capable of being-hydraulically actuated to shear saidshear means of the iirst cone, and meanson said body and operative upon endwise movement of said body subsequent to the shearing of the shear means on the nrst cone, to engage the second set of slips and move the same longitudinally relative to the second cone.

16. An apparatus of the character described comprising a hollow cylindrical member adapted to be connected at its upper endl to the vlower end `of a string of tubing and lowered thereby' into a string of well casing. a set of slips at the exterior shearing means capaof said member, a cone on said member, coinciding conical faces on said slips and cone whereby relative axial movement between said c one and slips `will move said slips radially outward into engagement with the casing, means for detachably connecting said slips to the member and 17. An apparatus of the character described comprising a hollow cylindrical member adapted to be connected to the lower end of a string of tubing and lowered thereby into a string of well I casing, a set of slips at the exterior of said member, a cone on the member, coinciding conical faces on said slips and cone whereby relative axial movement between said cone and slips will move said slips radially outward into engagement with the casing, means for detachably connecting said slipsto themember to maintain the slips in ineffective position, a hydraulically actuated packing sleeve for detaching said slips from the member and for causing relative axial movement between the slips and said member thereby moving said slips radially outward into engagement with the casing', and means for subsequently expanding said Apacking sleeve tb packing position and latching it in such position,v said packing sleeve being'expanded into packing engagement with the interior of the well casing by upward movement of said member subsequent to the releasing of said slips. 18. A device of the character described. comprising a body adaptedfto beconnectedjto the lower end of a string thereby into a well casing. a pair of cones 'carried by said body and normally secured against movement coaxially therealong, two sets of slips detachably secured thereto in their innermost po.-`

-sitions, cooperative conical faces on thecones and -surrounding'the body and adapted to expand and, elongate when the duid-pressure is built up between it and the body, said packer sleeve and cones being so relatively associated that uponelongation cf the packer sleeve it Ywilloperate one cone and set one set of said slips, said4 packer "fof tubing and lowered I sleeve being capable of thereafter being axially compressed by upward movement of the body,

said upward-#movementfalso setting the second set of slips by moving the same relative to the second cone.

19. An apparatus of the character described comprising a hollow body adapted to be secured to the lower end of a string of tubing and lowered into ay well casing, slips mounted on said body adapted for radial movement, an inatable memlier carried by said body in cooperative relationship with said slips for imparting radial movement thereto and means for applying iluid pressure to said member to inilate the same and actuate saidslips.

'moms M, moan. casamos E. soar..

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