US3209831A - Single bore hydraulic packer - Google Patents

Description

Oct. 5, 1965 M. L. CROW 3209,33@

SINGLE BORE HYDRAULIC PAGKER Fi g1, l' ATTORNEY Oct. 5, 1965 M. L. CROW SINGLE BORE HYDRAULIC PACKER 3 Sheets-Sheet 2 Filed Feb.

INVENTOR Morgan l.. Crow ATTORNEY 3 Sheets-Sheet 5 ATTORNEY Oct. 5, 1965 M. L.. CROW SINGLE BORE HYDRAULIC PACKER Filed Feb. 1, 196.3

United States Patent O 3,209,831 SINGLE BORE HYDRAULIC PACKER Morgan L. Crow, Dallas, Tex., assignor to Dresser Industries, Inc., Dallas, Tex., a corporation of Delaware Filed Feb. 1, 1963, Ser. No. 255,567 13 Claims. (Cl. 166-120) This invention is concerned with a packer to be set in a well casing to provide a seal of the annular space between the tubing and the casing to thereby separate the area in the tubing-casing annulus above and below same, and is particularly concerned with such a packer which is set by hydraulic pressure injected into the tubing from the surface, and is of the type which may be unseated and retrieved from the well.

Packers of this type have heretofore been fraught with certain difficulties and shortcomings which detracted from the utility and desirability of same, some of which shortcomings are as follows:

Such prior packers usually required the use of a tension member therein to support one end of the packer assembly while the other end is being telescoped to compress the rubber. This required additional length and mechanism in the packer assembly, giving rise to additional chances of failure.

To release such prior packers, it was usually necessary to rotate the tubing in order to release a I -slot or similar locking arrangement.

In such prior packers, it was necessary that the hydraulic cylinder be telescoped into running-in position before the packer could be released. Thus if debris and dehydrated mud collected in the cylinder while the packer was set, it could not be unset for retrieving.

In such prior packer constructions, no positive means was provided for preventing the packer from becoming unset by reason of dilferential of pressure thereacross, or by reason of weight imposed upon the tubing string, thereby giving rise to conditions of leakage about the packer after the packer is set in the well.

This invention is intended to overcome the foregoing objections and shortcomings of the previous packer constructions of this type, and others, and has among its objects the following:

The provision of a hydraulically actuated packer construction wherein the casing acts as the tension member to support the packer while being set, thereby eliminating a tension member inside the packer.

The provision of mechanical slips inside the packer which hold the packer in set position, thereby eliminating the effects of hydraulic pressure traps.

The provision of mechanical take-up slips inside the packer improves the packotf and holds same in position when the packer is further expanded and responds to increased pressure across the packer.

The provision of construction wherein no rotation is required to release the packer for retrieval, but the packer may be released by a simple upstrain on the tubing by a predetermined force.

The hydraulic piston and cylinder are positioned above the packer rubber so that the direct downwardly acting force is exerted against the packer rubber to set same, and no reversal of force is necessary to expand the packer.

The hydraulic cylinder does not have to be telescoped into running-in position to release the packer for retrieval and therefore the presence of debris and mud in the cylinder do not effect retrievability.

The provision of a uid by-pass equivalent to the tubing area which automatically opens to aid in retrieving the packer.

By virtue of using the casing as a tension member while setting the packer, positive tubing location is as- 3,209,831 Patented Oct. 5, 1965 ICC sured because the tubing does not have to rnove or stretch while the packer is being set, thereby eliminating interference with other packers and tools in the well. The entire setting force is absorbed by the casing through the hydraulic anchors positioned above the hydraulic cylinder and piston.

Other and further objects of the invention will become apparent upon reading the detailed specications hereinafter following, and by referring to the drawings annexed hereto.

A suitable embodiment of the invention is shown in the attached drawings, wherein:

FIGURES I and IA are a cross-sectional elevational view of the packer incorporating the improvements described and claimed herein as it would appear While being lowered into the well on a string of tubing, and prior to actuating same for setting in the casing;

FIGURES II and IIA are a cross-sectional, elevational view of the packer as it would appear after being set in the casing;

FIGURES III and IIIA are a cross-sectional, elevational view of the packer as it would appear after being relaxed, and while being retrieved from the well on the tubing string;

FIGURE IV is a transverse, sectional view taken on the line IV-IV of FIGURE I;

FIGURE V is an exploded View of the lower end of the shell which extends through the packer rubbers, and the shell slip assembly which is mounted thereon while the packer is being run into the well, and. while it is set in the well;

FIGURE VI is a transverse, sectional View taken along the line VI-VI of FIGURE I;

FIGURE VII is a top perspective view of a typical mandrel slip body;

FIGURE VIII is a transverse, sectional view taken along the line VIII-VIII of FIGURE I; and

FIGURE IX is a transverse sectional view taken along the line DC-IX of FIGURE II.

Numeral references are employed to designate the various parts shown in the drawings, and like numerals indicate like parts throughout the various gures of the drawings.

Referring first to FIGURES I and IA, the numeral 1 indicates a tubular mandrel, which is attached at its upper end to the generally cylindrical tubular hydraulic anchor body 2 by means of a threaded connection indicated at 3.

The packer assembly hereinafter described is suspended on a tubing string 4 by means of a threaded connection 5 while being lowered into the well.

A plurality of piston s lips 6 are movably positioned in bores 6a provided in the Wall of the anchor body 2, each piston slip 6 being slidably sealed to the inner wall of the bore 6a by means of a resilient O-ring 8 extended thereabout in a suitable groove.

Piston slip retainer strips 7 are positioned between the toothed sections on each slip body 6, and are attached to the anchor body 2 by means of screws 9.

Springs 10 are positioned between the slip retainers 7 and the slip bodies 6, to normally urge the slip bodies 6 inwardly of the passages 6a, so that when pressure is relieved from the slip bodies the piston teeth carried thereby are retracted out of engagement with the casing 62.

Hydraulic passages 11 are provided through the wall of the anchor body 2 to provide communication between the bore of the tubingstring and the bores 6a rearwardly of the piston bodies 6, in order to convey pressure from the tubing string to the piston bodies 6, to move same outwardly to thereby anchor the toothed outer faces, on the hydraulic anchors with the inner wall ofthe casing.V

A hollow, generally cylindrically shaped hydraulic cylinder 13 slidable receives the lower end of the anchor body 2, and is slidably sealed thereto by means of a resilient O-ring 14 positioned about the lower end of the anchor body 2 in an appropriate groove. The lower lend of anchor body 2 thus provides a stationary piston for the telescopically related hydraulically actuated members 2 and 13. A plurality of diagonally disposed hydraulic ports 15 are provided through the wall of the lower end of the anchor body 2, to permit communication between the interior of the tubing string and the annular space 13a within the hydraulic cylinder 13.

A mandrel slip housing 16 is threadedly engaged, as

indicated at ,17, to the lower end of the cylinder 13, and is threadedly engaged at its other end with the shell 26, as indicated at 26a, and with the upper end thimble 31 as indicated at 16a. The lower end of the cylinder 13 extends into the bore through the mandrel slip housing 16, and is slidably sealed about the mandrel 1 by O-ring seals 18 positioned in suitable grooves provided on the inner wall of the bore through the lower end of the cylinder 13.

A seal is provided between the inner wall of the slip housing 16 in the outer wall of the lower end of the cylinder 13 by an O-ring seal 19, which is mounted in an appropriate groove provided about the lower end of the cylinder 13.

A plurality of slip bodies 20 are spaced about the mandrel 1, and have teeth on the inner sides thereof which are directed upwardly and arranged to bite into the outer wall of the mandrel 1 for the purposes hereinafter mentioned.

The slip bodies 20 have conical surfaces 20a on the outer sides thereof which contact a corresponding conical surface 21 on the inner side of the slip housing 16 so that relative force exerted between the slip bodies 20 and the slip housing 16 will cause the slip bodies 2t) to be forced inwardly against the mandrel 1.

A mandrel guide ring 22 is arranged about the mandrel 1, and has secured thereto, at spaced intervals, screws 23 which extend below the ring and into bores 24 provided in the upper surface of the slip bodies 20. The downwardly extending lower portions of the screws 23 are loosely disposed in the bores 24 in order to align, and maintain in alignment, the slip bodies 20 in spaced relationship about the mandrel 1 (see FIG. VI).

A pair of helical springs 25 are disposed between the guide ring 22 and each of the slip bodies 20. The springs 25 extend into bores 25a provided in the upper surface of the slip bodies 20 and into bores 23a provided in the lower surface of the ring 22.

The springs 25 are arranged to urge the ring 22 and slip bodies 20 apart, and to maintain the conical surfaces 20a and 21 in contact when the slip housing 16 is moved downwardly relative to the mandrel 1 in the manner hereinafter described.

The tubular shell 26 is disposed about the mandrel and is threadedly engaged at its upper end to the slip housing 16 by threads indicated at 26a. A seal ring 27 is provided between the ends 0f the shell 26 and the inner wall of the slip housing 16, which is compressed into sealing condition when these parts are threaded together.

A plurality of resilient rubber or synthetic rubber packer sleeves 29 are disposed about the tubular shell 26, said packer sleeves being separated by appropriate spacer rings 30, and are engaged at each end by cup-like thimbles 31, which thimbles are threadedly engaged to the slip housing 16 and spacer collar 34 by threaded connections 16a and 34a, respectively.

The tubular shell 26 is frangibly secured to the mandrel 1 by means of shear pins 32 which are threaded through spaced passages 32a provided through the wall of the shell 26, with the grooved inner ends thereof extending into an appropriate annular groove 32h provided in the outer wall of the mandrel 1. The shear screws 32 may be threaded into place through the passage 32a provided through access ports 33 formed through the wall of the spacer collar 34.

The tubular spacer collar 34 is threadedly engaged at its upper end to the lower thimble 31 by means of appropriate threads 34a, and is threadedly engaged at its lower end to the expander head 43 by .means of appropriate threads 44.

The spacer collar 34 not only serves as a spacer between the packer rubbers and the anchor slip assembly at the bottom of the packer, but provides an anchor point for anchoring the packer sleeve support shell 26 to the spacer collar 34 to hold the packer sleeves in compressed condition after being set, and to compensate for further compression of the packer sleeves by increased pressure differential thereacross while the packer is set, in the manner which will be described in detail hereinafter in connection with the description of the operation of the packer.

A plurality of slip bodies 35 are spaced about the lower end of the shell 26, said slip bodies 35 having upwardly directed teeth on the outer surfaces thereof arranged to bite into the inner wall of the spacer collar 34.

The slip bodies 35 have inner conical surfaces 35a on the inner sides thereof which are seated against a corresponding conical surface on a cone ring 36.

A plurality of latch dogs 37 are slidably disposed in passages 38 provided in spaced relationship through the wall of the shell 26. Each latch dog 37 has a shoulder 37a thereon which engages a corresponding downwardly facing shoulder 36a on the inner side of the slip cone 36. Thereby lthe slip cone 36 is supported with the conical surface thereon in engagement with the conical surfaces on the inner sides of the slip bodies 35. The upper end of the slip cone 36 is positioned against a downwardly facing shoulder 26b on the shell 26 to limit the upward movement of the Cone with relation to the shell.

A shell slip ring 39 is arranged about the lower end of the shell 26 and is positioned against shoulder 26C provided about the shell.

A plurality of spaced guide pins 40 are secured to the ring 39 and extend downwardly therefrom. ri`he guide pins 40 are arranged to extend between slip bodies 35 in order to space same apart and hold them in a predetermined spaced position. A pair of helical springs 41 are positioned between each of the slip bodies 35 and the ring 39 by positioning same in holes 35a provided in the upper surfaces of the slip bodies 35 and in aligned holes in the lower face of the guide ring 39. An annular groove 42 is provided about the mandrel f1, which is arranged to receive the slip dogs 317 when moved into alignment therewith upon unsetting and retrieval of the packer in the manner hereinafter described.

The slip expander head 43 is threadedly connected, as indicated at 44, to the lower end of the spacer sleeve 34.

A plurality of lower anchor slips 415 have downwardly directed teeth 45a on the Iouter surface thereof arranged to bite into the inner wall of the casing 62 t-o anchor the packer assembly in the casing when the .pa-cker is set.

The slip .bodies 45 have upwardly directed conical surfaces on the inner sides thereof which co-act wit-h a corresponding conical surface 43a on the expander head 43, to move the slips outwardly into anchoring engagement with the casing wall `when the head 43 and slip bodies 45 are moved relative to each other.

Preferably a stop shoulder 46 engages a corresponding shoulder 43b on head 43 to limit the downward position of slip body 45 relative to the head 43.

An upwardly facing shoulder 48 is provided in the expander head 43, which contacts the downwardly facing shoulder 47 on the mandrel 1, said shoulders providing positioning shoulders between the expander head 43 and the mandrel.

An upwardly facing shoulder 47a is provided about the mandrel l which constitutes a pick-up shoulder to engage the lower end of the shell 26 to permit the packer assembly to ybe picked up on the mandrel 11 'and withdrawn from the lwell on the tubing string, after the packer has been retracted in the manner hereinafter described.

A slip pin housing 49 is arranged about the mandrel l and is frangibly connected thereto .by means of the shear pin 50 and shear screw 50a which extend into an appropri-ate channel 50h in the outer wall of the mandrel 1.

Slip retainers :51 on whi-ch 'the slip bodies 45 are slidably mounted by placing the extension 45b on each slip in an upwardly extending slot on the slip retainer y51, are secured to the housing 49 by means of retainer screws 52.

An enlarged hollow base 53 is threadedly engaged to the lower end of the mandrel 1 by means of threads indicated at 53a and is threadedly engaged at its lower end to a coupling 54 by means of threads 53b.

A tubular seating sub 55 is threadedly engaged to the coupling 54 by means of threads 54a.

The seating sub 55 has mounted in the bore thereof a shearable seat ring 56 having a seat 56a in the upper end thereof arranged to receive a shearing ball 57 which is dropped into the tubing string prior to applying pressure from the surface through the tubing string to set the packer.

The shearable seal ring 56 is sealingly engaged with the inner Wall of the bore of the seating sub 55 by a resilient O-ring seal 58 which is disposed in a suitable annular groove on the inner side of the bore of the seating sub.

The seal ring 56 is supported in the bore of the seating sub 55 by means of a frangible shear ring 59 which engages a shoulder 56a on the shearable seating ring and has .a reduced portion 56b clamped between the inner end of the shear ring retainer 60 and a downwardly facing shoulder in the bore of the seating sub 55. The shear ring retainer 60 is threadedly engaged in the lower end of the bore of the seating sub 55 on companion threads 61.

The operation and function of the hydraulically actuated packer hereinbefore descri-bed is as follows:

The packer .assembly is run into the casing 62 suspended `on the tubing string `4 in the position shown in FIGURES I and IA.

When it reaches the position in the well casing where Iit is t-o be set, the shear ball 57 is dropped into the tubing and allowed to gravitate downwardly therethrough until it comes to rest on the seat 56a.

Fluid pressure is then built up in the tubing string, which first acts upon the pist-on slips 6 through the passages 1-1, to move the slip teeth thereon outwardly into rzrchoring engagement with the inner wall of the cas-ing Increased pressure in the tubing string acts upon the inner face 13b in the cylinder 1-3, between the seals 14 and `18, through the ports 15, to cause the shear pins 32 to break, thereby permitting the downward movement of the cylinder 13, slip housing 16, shell 26, spacer `sleeve 34, and expander head 43, with relation to the mandrel '1. The mandrel remains stationary by reason of being connected to the anchor body 2 which is anchored to the casing by piston slips 6.

The downward movement of the expander head 43 moves the slips 45 outwardly into anchoring engagement with the inner wall `of the casing, which causes the shell Z6 to telescope with .relation to the spacer sleeve 34, thereby shortening and radially expanding the packer sleeves 29 into sealing engagement with the casing wall, as shown in FIGURE II, as pressure on surface 13b generates downward force, which acts through slip housing 116 and snpport 311, to packer sleeves 29.

'It will be noted that as the piston 13 and slip housing 116 move downwardly in the manner hereinbefore described, the mandrel .slips 20 also move downwardly therewith and the tapered surfaces 20a thereon are maintained in contact with the conical surface 21 by the springs 25, and that in such moved position, the upwardly directed teeth on the inner sides of the slip bodies 25 will be in position to bite into the wall of the mandrel 1 to maintain the shell 26 and expanded packer rubbers 29 in such position against upwardly directed force. Thereflore, upwardly directed force from below the packer will tend to further expand the packer sleeves to provide a tighter seal.

Furthermore, weight imposed upon the tubing string and to the mandrel `1 from the surface will further tend to expand the packer sleeves 29 yand provide a tighter seal by reason of the transfer of such force through the slips 25 to the slip housing 16 and to the support 3-1 and the packer sleeves.

It will further be noted that upon tele-scoping movernent between the shell 16 and the spacer sleeve 34, the slips 35 move downwardly along the inner wall of the `spacer sleeve 34, and the conical surfaces on the inner sides thereof are caused to be maintained in contact with the conical surfaces 35a on the outer sides of the expander ring 316 by means of the springs 41.

The upwardly directed teeth on the outer surfaces of the slips 35 bite into the inner wall of the spacer sleeve 34 to anchor the shell 26 thereto against upward movement. Any relaxation of the packer rubbers 29 by reason of change in pressure differential thereacross is prevented because the shell 26 and spacer sleeve 34 are anchored against untelescoping movement by the slips 35. Any further compression of the packer sleeves 29 is maintained by reason of such anchoring lagainst untelescoping movement between the members 34 and 26.

Therefore, it w-ill be seen that the packer is held rmly in set position by built in slips within the packer assembly and any further compression of the packer sleeves after being set is maintained and locked in place by the built in slips,

After the packer is set, as shown in FIGURES II and IIA, further increase of pressure in the tubing string causes the shear ring 59 to break and thereby eject the seat ring 56 and ball 57 into the casing therebelow.

To unseat the packer for retrieval from the well, an upward force is exerted on the tubing string 4 suliicient to break the shear pins 50 and 50a which hold the mandrel down. This permits the 4anchor body 2 and mandrel 1 to move upwardly with relation to the cylinder 13 until the passages 15 move to a position above the upper end of the cylinder 13 to permit by-pass of fluid from the casingtubing annulus through the tubing from above the packer while it is being retrieved, thus permitting a by-pass which is equivalent to the tubing area, to thereby permit ease in retrievability.

Continued upward movement of the mandrel 1 will bring the groove 42 into alignment with the latch dogs 37, as the pickup shoulder 47a contacts the lower end of the tubular shell 26.

The dogs 37 retract into the groove 42, thereby releasing the shoulders 37a on the dogs from engagement with a shoulder 36a on the slip cone 36. This releases the attachment between the shell 26 and spacer sleeve 34 through the slips 35, and permits the rubber packer sleeves 29 to relax by reason of the upward movement of the shell 26 relative thereto.

By upward lift on the packer assembly, the lower slips 45, which are supported by the released slip housing 49, are allowed to retract by downward movement thereof with the housing 49 as the tapered inner surface of the slips slide along the corresponding tapered surface of the expander head 43.

The shoulder 47a, which picks up the shell 26, provides a positive upward pull on the cylinder 13, mandrel slip housing 16, shell 26, thimbles 31, packer sleeves 29, spacer collar 34, and expander head 43, which are attached to- 7 gether, lso that after the release of the lower slip heads 35 from the shell 26, the expander head 43 is lifted upward, as the packer sleeves relax, allowing the slips to retract, and the packer thus is completely and simultaneously released for retrieval.

The tluid by-pass, as hereinbefore described, is open during the retrieval, allowing full tubing area by-pass for rapid pulling.

It will be noted that the cylinder 13 does not have to return to running-in position to retrieve the packer, as is necessary in prior art packer constructions of this type.

lt will also be noted that upon the release of the cone ring 36 from the slip bodies 35, the slip bodies 3S and the guide ring 39 are free of attachment to the shell 26, and may either remain anchored to the inner wall of the spacer sleeve 34 or may tall down to a position of rest on the upper end of the expander head 43, where they are removed from the well with the other parts of the packer assembly. v

It will thus be seen that I have provided a hydraulically actuated packer assembly wherein the casing serves as the tension member, permitting the tubing to be accurately positioned, preventing tubing movement during setting, and preventing interference with other packers and tools in the well; wherein no tension member is necessary to be provided in the packer assembly; wherein positive means are provided inside the packer to prevent unsetting of the packer rubbers; in which increased expansion of the rubber while set is locked in; which may be released without rotation; in which the telescoping hydraulically actuated members do not have to be moved to running-in position for retrieval; wherein a full tubing-bore by-pass is provided upon retrieval; wherein the hydraulic cylinder is above the packer rubber; and which is positive in its action and easy to run, set, release and retrieve.

It will be understood that other and further forms of the invention may be devised without departing from the spirit and scope of the appended claims,

Having described my invention, I claim:

1. In a packer, a tubular anchor body; hydraulically actuated piston slips mounted in the wall of the body and movable outwardly thereof; a mandrel suspended in the bore of the anchor body; a cylinder slidably embracing the anchor body; ports through the wall of the anchor body; seal means between the anchor body and the inner wall of the cylinder; seal means between the inner wall of the cylinder and the mandrel in spaced relation to the rst named `seal means, the sai-d ports communicating with the area between the seals; a slip housing attached to the cylinder; gripping means in the housing having inwardly directed teeth thereon; conical surfaces on the gripping means and in the housing arranged to move the gripping means inwardly into engagement with the mandrel; spring means between .the slips and the cylinder arranged to urge the conical surfaces into contact; a tubular member slidably disposed about the mandrel and secured to the slip housing; at least one resilient packer sleeve disposed about the tubular member; support means at the upper end of the packer sleeve secured to the tubular member; support means at the lower end of the packer sleeve; shoulder means on the tubular member arranged to contact the lower support means to limit downward movement of the support means; means frangibly connecting the tubular member to the mandrel; a spacer sleeve secured to the lower support means; gripping means disposed between the outer wall of .the tubular member and the inner wall of the spacer sleeve; outwardly directed teeth on the gripping means arranged to contact the inner wall of the spacer sleeve; an expander ring about the tubular member; opposed conical surfaces on the expander ring and on the gripping means arranged to urge the gripping means outwardly; spring means between the gripping means and the tubular member arranged to urge the conical surfaces together; a plurality of spaced passages ithrough the Wall of the tubular member; a latching dog slidably disposed in each ypassage with their inner ends slidably contacting the mandrel; the dogs having outer ends extending beyond the outer surface of the tubular member; opposed contacting shoulders on the outward-ly extending portions of the dogs and in the expander ring to support the expander ring in contact with the gripping means; a groove about the mandrel arranged to receive the dogs when moved opposite same; an external pick-up shoulder on the mandrel arranged to Contact the lower` end of the tubular member when the groove has been moved opposite the dogs; an expander head about the mandrel and suspended from the spacer sleeve; a plurality of slips about the mandrel having teeth on their outer sides arranged to move .into conta-ct with a well casing wall surrounding same; opposed slidably related conical surfaces -on the outer side of the expander head and the inner sides of the slips; and frangible means for securing the slips to the mandrel.

2. The combination called for in claim 1 with the addition of a tubular valve seat housing extending below the mandrel; a valve seat in the valve seat housing; and frangible means securing the valve seat in the housing.

3. The combination called for in claim 1 wherein the cylinder and the seal means between the cylinder and the anchor body are disposed above the tubular member and packer sleeve.

4. The combination called for in claim 1 wherein the ports through the wall of the anchor body are so positioned with relation to the cylinder, pickup shoulder and lower end of the tubular member that the ports are above the upper end of the cylinder when the pickup shoulder engages the lower end of the tubular member.

5. In a well packer, a tubular body, hydraulically actuated anchor means carried by the body and being movable outwardly thereof; a cylinder slidably and sealingly disposed about the body; a tubular mandrel secured to the body and being slidably and sealingly extended through the lower end of the cylinder; a tubular packer sleeve support suspended from the cylinder and surrounding the mandrel; at least one resilient packer sleeve carried about the sleeve support; means frangibly connecting the sleeve support to the mandrel; an upper end support for the packer sleeve secured to the tubular packer sleeve support; a lower end support for the packer sleeve; a tubular member overlapping the tubular sleeve support and connected to the lower end support; gripping means arranged between the tubular packer sleeve support andV the mandrel having inwardly directed teeth thereon arranged to engage the mandrel; means to urge the gripping means into engagement with the mandrel; expander means arranged about the mandrel and suspended from the tubular member; and anchor slip means frangibly connected to the mandrel having outwardly directed teeth thereon arranged to be moved outwardly by relative movement between the expander means and the slips.

6. The combination called for in claim 5 with the addition of other slip means arranged between the tubular member and the tubular packer sleeve support having outwardly directed teeth therein arranged to contact the tubular member; and releasable means urging the said other slips outwardly providing a releasable connection between the tubular sleeve support and said other slip means.

7. The combination called for in claim 6 wherein the releasable connection comprises a plurality of dogs slidably disposed through the wall of the sleeve support; a conical ring supported by the dogs; and a recessed area on the mandrel arranged to receive and allow inward movement of the dogs when moved adjacent thereto.

8. The combination called for in claim 5 with the addition of a pickup shoulder on the mandrel arranged to contact the lower end of the tubular packer sleeve support.

9. In a well packer; a tubular body having a longitudinal passage therethrough; a tubular mandrel suspended below the body in communication with the passage; at

least one resilient packer sleeve surrounding the tubular mandrel; an upper packer sleeve support; a lower packer sleeve support extending below the packer sleeve including a part releasably attached to the tubular mandrel below the packer sleeve; a tubular member surrounding the mandrel and extending through the packer sleeve and connected to the upper and lower packer sleeve supports anchor slips having outwardly directed teeth thereon attached to the releasable part of the lower packer sleeve support; expander means surrounding the tubular mandrel below the packer sleeve arranged to co-act with the anchor slips to move the anchor slips outwardly; hydraulically actuated telescoping members, one of which is stationary and attached to the tubular mandrel, and the other of which is movable downwardly about the tubular mandrel against the upper packer sleeve support to compress. the packer sleeve; and hydraulically actuated piston slips mounted in the wall ot the tubular body and movable outwardly thereof.

10. The combination called for in claim 9 with the addition of shoulder means on the tubular mandrel engageable with the tubular member when the tubular mandrel is moved upwardly.

11. The combination called for in claim 9 with the addition of engaging means between the upper packer sleeve support and the tubular mandrel having inwardly directed teeth thereon engageable with the tubular mandrel; and means on the support co-acting with the engaging means to urge the teeth into engagement with the tubular mandrel.

12. The combination called for in claim 9 with the addition of a plurality of slips between the lower packer sleeve support and the tubular member, said `slips having teeth on the outer sides thereof; and releasable means carried by the tubular member engaged with the slips to support same in upward and outward position.

13. The combination called for in claim 9 with the addition of ports through the wall of the tubular body communicating with the longitudinal passage, said ports being so positioned with relation to the upper end of the movable telescoping member that the ports are above the upper end of the movable telescoping member when the movable telescoping member and the body are expanded longitudinally with relation to each other.

References Cited by the Examiner UNITED STATES PATENTS 2,l59,640 5/39 Strom 166-212 2,467,801 4/49 Baker 166-120 3,002,564 10/61 Baker 166-212 3,013,610 12/61 Conrad 166-120 3,020,959 2/62 Nutter 166-120 3,054,450 9/62 Baker 166--120 3,055,430 9/62 Campbell 166--198 BENJAMN HERSH, Primary Examiner.

Claims (1)

1. 9. IN A WELL PACKER; A TUBULAR BODY HAVING A LONGITUDINAL PASSAGE THERETHROUGH; A TUBULAR MANDREL SUSPENDED BELOW THE BODY IN COMMUNICATION WITH THE PASSAGE; AT LEAST ONE RESILIENT PACKER SLEEVE SURROUNDING THE TUBULAR MANDREL; AN UPPER PACKER SLEEVE SUPPORT; A LOWER PACKER SLEEVE SUPPORT EXTENDING BELOW THE PACKER SLEEVE INCLUDING A PART RELEASABLY ATTACHED TO THE TUBULAR MANDREL BELOW THE PACKER SLEEVE; A TUBULAR MEMBER SURROUNDING THE MANDREL AND EXTENDING THROUGH THE PACKER SLEEVE AND CONNECTED TO THE UPPER AND LOWER PACKER SLEEVE SUPPORTS ANCHOR SLIPS HAVING OUTWARDLY DIRECTED TEETH THEREON ATTACHED TO THE RELEASABLE PART OF THE LOWER PACKER SLEEVE SUPPORT; EXPANDER MEANS SURROUNDING THE TUBULAR MANDREL BELOW THE PACKER SLEEVE ARRANGED TO CO-ACT WITH THE ANCHOR SLIPS TO MOVE THE ANCHOR SLIPS OUTWARDLY; HYDRAULICALLY ACTUATED TELESCOPING MEMBERS, ONE OF WHICH IS STATIONARY

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