US3282340A

US3282340A - Retrievable pump and anchor apparatus

Info

Publication number: US3282340A
Application number: US292926A
Authority: US
Inventors: Robert O Park
Original assignee: Baker Oil Tools Inc
Current assignee: Baker Hughes Oilfield Operations LLC
Priority date: 1963-07-05
Filing date: 1963-07-05
Publication date: 1966-11-01
Anticipated expiration: 1983-11-01

Description

Nov. 1, 1966 R. o. PARK RETRIEVABLE PUMP AND ANCHOR APPARATUS 4 Sheets-Sheet l A; 26.

INVENTOR. Bosser 0- P01? 107'7'0QNE)$.

Filed July 5, 1965 Nov. 1, 1966 R o. PARK RETRIEVABLE PUMP AND ANCHOR APPARATUS 5 K Y 5 w m R w 2 Op 2 t p 0 e 7 N r e 5 w T M E mo M p S t 7 E e 4 w a 0 w W Rm 3 l y m d l e H F Nov. 1, 1966 R. 0. PARK RETRIEVABLE PUMP AND ANCHOR APPARATUS 4 Sheets-Sheet 5 Filed July 5, 1963 INVENTOR. E0552? 0, PQRK 10 T roQn/E Y5.

Nov.

Filed July 5 1963 R. O. PARK RETRIEVABLE PUMP AND ANCHOR APPARATUS 4 Sheets-Sheet 4 ITIHHH INVENTOR. B08527 0. Page 47 roe/vans.

United States Patent fornia Filed July 5, 1963, Ser. No. 292,926 16 Claims. (Cl. 166-106) The present invention relates to subsurface well bore apparatus, and more particularly to apparatus capable of being anchored in a tubular string in a Well bore in connection with pumping of the well, and for enabling other desirable purposes in the well bore to be performed.

An object of the invention is to provide pumping apparatus adapted to be anchored in a tubular string disposed in a well bore, the pump being detachable from the anchor portion of the apparatus for removal from the tubular string so as to allow the anchor portion of the apparatus to remain anchored in the tubular string, such anchor portion also being retrievable from the tubular string, if desired.

Another object of the invention is to provide pumping apparatus adapted to be anchored in a tubular string disposed in a well bore against movement therewithin, in which the sucker rods, pump, and pump seating shoe, constituting the apparatus, can be run in the tubular string at the same time and placed in operating position there- Within, thereby eliminating the necessity for making separate trips of equipment in the tubular string.

A further object of the invention to provide pumping apparatus adapted to be run in a tubular string on sucker rods and readily set therein by appropriate manipulation of such sucker rods.

An additional object of the invention is to provide pumping apparatus, including sucker rods, a pump, and retrievable pump seating shoe, adapted to be run as a unit in a tubular string and anchored therein through manipulation of the sucker rods, the shoe being readily released from the tubular string and shifted to a new location therein, or retrived from the well bore, at the will of the operator.

Yet another object of the invention is to provide a retrievable pump seating shoe adapted to be run and anchored in a tubular string disposed in a well bore, in which the shoe can remain anchored until its release from the tubular string is desired, which can be effected in a simple manner by the mere taking of an upwardly directed pull on the shoe.

Still a further object of the invention is to provide an improved anchor or packer adapted to be anchored in a tubular string, which will remain in its anchored condi tion against both up and down movement, and which is readily releasable from the tubular string, or retrievable therefrom, or both, by the taking ofan upward pull there- This invention possesses many other advantages, and has other objects which may be made more clearly apparent from a consideration of several forms in which it may be embodied. Such forms are shown in the drawings accompanying and forming part of the present specification. These forms will now be described in detail for the purpose of illustrating the general principles of the invention; but it is to be understood that such detailed description is not to be taken in a limiting sense, since the scope of the invention is best defined by the appended claims.

Referring to the drawings:

FIGURE 1 is a side elevational view and longitudinal section through an apparatus disposed in a tubular string, the apparatus being in a released condition;

FIGS. 2a and 2b constitute a combined longitudinal section and side elevational view of the apparatus disclosed ice in FIG. 1, on an enlarged scale, FIG. 2b being a lower continuation of FIG. 2a;

FIGS. 3a and 3b are views corresponding to FIGS. 2a and 2b, with the apparatus in its set condition in the tubular string, FIG. 3b being a lower continuation of FIG. 3a;

FIG. 4 is a side elevational view of a lock portion of the apparatus when parts of the apparatus are in the condition illustrated in'FIGS. 2a and 2b;

FIG. 5 is a view similar to FIG. 4 of the lock portion of the apparatus when the parts are in' the condition illustrated in FIGS. 3a and 3b;

FIG. 6 is a cross-section taken along the line 6-6 on FIG. 2b;

FIG. 7 is a cross-section taken along the line 77 on FIG. 2b;

FIG. 8 is a cross-section taken along the line 8-8 on FIG. 2b;

FIGS. 9a and 9b constitute a side elevational view and longitudinal section through the apparatus conditioned for elevation in the tubular string, FIG. 9b being a lower continuation of FIG. 9a;

FIG. 10 is a longitudinal section through a modified form of the upper portion of the apparatus shown in FIGS. 1 to 8, inclusive;

FIGS. 11a and 11b constitute a side elevational view and longitudinal section through a modified form of apparatus anchored in the tubular string, FIG. 11b being a lower continuation of FIG. 11a.

In the form of apparatus illustrated in FIGS. 1 to 9b, an anchor packer A is disclosed that embodies a pump seating shoe 10 which is to be placed in an appropriate position in a tubular string B, such as a string of production tubing, installed in a well bore. A pump C is re leasably secured to the seating shoe 10, which is actuated by a suitable string of sucker rods D extending to the top of the well bore, the sucker rods being reciprocated by any suitable type of mechanism at the top of the well bore, in a known manner.

The anchor apparatus A can be constituted as a well packer, including a tubular body 11 having the upper seating shoe portion 10 threadedly secured thereto, which is adapted to receive the seating mandrel or hold down part 12 of the pump C. The seating mandrel has a central passage 13 therethrough and carries a plurality of pliant, elastic rings 14 which will frictionally engage the inner cylindrical wall 15 of the seating shoe. Threadedly secured to the seating shoe is the inner stationary plunger 16 of the deep well pump that has a central passage 17 therethrough communicating with the mandrel passage 13. This plunger has an upper seat 18 adapted to be engaged by a downwardly seating ball 19 of a standing v-alve portion of the pump. Surrounding the plunger and making a close fit therewith is a traveling barrel 20, the upper end of which is secured to the string of sucker rods D extending through the tubing string B to the top of the well bore. The traveling barrel has an upper traveling valve 21 therein, including a valve seat 22 adapted to be engaged by a downwardly seating ball 23.

The pump C is shown only diagrammatically in the drawings, since its structure and mode of operation are known. During upward movement of the sucker rods D and traveling barrel 20, the traveling valve 21 is closed, the well production being elevated in the tubular string B. During upward movement of the traveling valve 21 away from the standing

valve

18, 19, the fluid in the well bore can flow upwardly through the plunger 16, elevating the ball 19 from the standing valve seat 18, the Well production flowing past the ball 19 into the space 24 within the traveling barrel between the traveling valve and standing valve. Upon downward movement of the sucker rods D and traveling barrel 20, the standing valve o: 18, 19 closes, and the fluid in the traveling barrel above the standing valve will elevate the traveling valve ball 23 for its seat 22, such fluid flowing through the upper ports 25 in the traveling barrel into the tubing string B above the pump.

The tubular body 11 of the well packer A has a packing element 26, such as a rubber or rubber-like sleeve member, mounted thereon, the upper end of the packing element engaging the lower end of the seating shoe 10 and its lower end engaging the upper end of an expander 27 having a lower downwardly tapering expander surface 28. Such surface is adapted to engage companion inner tapered surfaces 29 on the upper anchor portions 36 of circumferentially spaced slip members 31 disposed around the body of the tool. These slip members are mounted within longitudinal slots or grooves 32 in a slip sleeve 33 slidable on the body 11, the slip sleeve being threadedly connected to a housing 34 and having a lock pin 35 mounted thereon adapted to fit within a lock slot 36 formed in the body. The lock pin 35 is held in position in the housing by an encompassing retainer sleeve -37 mounted on the housing and suitably secured thereto, as by means of a screw 38. The housing may also have a plurality of outwardly bowed drag springs 39 adapted to frictionally engage the wall of the tubing, the upper ends 40 of the drag springs being attached to the housing by the retainer sleeve 37, which encompasses them. The lower portions 41 of the drag springs may slide along the housing 34, or along the bases of longitudinal grooves 42 formed in the body, so that the drag springs 39 can flex inwardly and outwardly.

The slip members 31 have lower drag portions 43 adapted to frictionally engage -the wall of the tubing, such drag portions being urged outwardly by helical compression springs 44 bearing against the bases of the slots 32 and against the drag portions. The drag portions 43 extend through windows 45 formed in the slip sleeve 33, stop portions 46 of the sleeve being disposed in intermediate grooves 47 in each slip member so as to hold the slip member assembled on the slip sleeve. The stop portions 46 limit the extent of outward movement of the slip members 31 when the apparatus is removed from the tubing string B and also engage the slip members themselves to insure their joint longitudinal movement with the slip sleeve 33 in the tubing string. The lower ends 48 of the slip members are also engageable with the upper end of the retainer sleeve 37 to limit the extent of outward movement of the drag portions 43 when the tool is out of the tubing string.

When the drag portions 43 fully engage the wall of the tubing string, the anchor portions 30 are disposed inwardly so that their

teeth

49, 49a do not engage the tubing wall. Assuming the expander 27 to be shifted downwardly behind the anchor portions 30, the latter are shifted outwardly, the slips rocking on the tubing wall about the upper ends of their drag portions 43, with the slip members below such fulcrum or rocking points 50 shifting inwardly against the force of the springs 44. The

teeth

49, 49a are adapted to be embedded in the wall of the tubing to anchor the apparatus thereto. It is to be noted that the teeth 49 on some (such as /2 of the slip members face in an upward direction and that the teeth on the remainder of the slip members face in a downward direction, so as to anchor the apparatus to the tubing string against movement in both longitudinal directions when forced outwardly against the tubing string by the expander 27.

Downward movement of the expander 27 along the body 11 of the tool is prevented initially by engagement of an inner flange 51 on the expander with an outwardly directed flange 52- on the body. However, the body 11 can move downwardly within the expander, as well as within the slip sleeve 33 and the housing 34. Initially, the packing element 26 and slips 31 are in their retracted positions, with the expander 27 disposed above the slips,

4 the body 11 being prevented from shifting to any substantial distance within the parts therearound by the pin and

slot lock device

35, 36. As shown, the slot 36 has a short longitudinal leg portion 53 offset from a long longitudinal leg portion 54, the upper end 55 of the long leg portion terminating a substantial distance above the upper end 56 of the short leg portion 53. The lower end of the long slot leg portion 54 merges into a diagonal slot 57 that extends to the lower end of the short leg slot portion.

The lock pin 35 is adapted to move relatively within all of the slot portions, being shiftable from a No. 1 position, shown in FIG. 4, engaging the upper end of the body forming the terminus of the short slot leg 53, to a No. 2 position at the lower end of the short leg, then proceeding relatively through the diagonal slot portion 57 to the No. 3 position at the lower end of the long leg 54 and then relatively upwardly to the No. 4 position at the upper end of the long leg. When the pin 35 is in the No. 1 position, the body 11 is prevented from moving downwardly with respect to the housing 34, slip structure, and expander 27, so that the slips 31 and packing element 26 remain in their retracted positions. Upon elevation of the body 11 within the housing 34, the short leg 53 of the slot is moved upwardly so that the pin then occupies the No. 2 position, whereupon the body can be turned to the right and lowered gradually, so that the lock pin moves relatively through the diagonal slot 57 to the No. 3 position, whereupon the body can be lowered to shift the packing element 26 and expander 27 downwardly toward the slips 31, the movement of which is resisted by the frictional engagement of the drag portions 43 against the tubing string B, supplemented by the friction force of the drag springs 39 against the tubing string. Upon such downward movement, the expander 27 is disposed within the anchor portions 30 of the slips, rocking the slips on the tubing wall to shift their anchor portions outwardly and embed the upward and downwardly facing

teeth

49, 49a into the wall of the tubing. A continuation of the downward movement of the body 11 will then shift the seating shoe 10 toward the expander 27 to shorten the packing element 26 and expand it outwardly into sealing engagement with the wall of the tubing string B.

The well packer or anohor A is adapted to be releasably locked in the anchored and packed-wolf condition just described by a releasable lock device acting between the housing 34- and the body 11. Such lock includes a plurality of ratchet teeth 60 on a lower portion of the body, the upper and lower sides of which are both tape-red. These ratchet teeth are adapted to engage companion internal ratchet teeth 61 in a split lock ring or sleeve 62 mounted within the lower portion of the housing and having external cam teeth 63 engageable with companion 1 internal cam teeth 64 formed in the housing. The coengaging tapered

cam teeth

63, 64 are tapered in an upward and inward direction so that any relative upward movement of the lock sleeve or ring 62 along the housing 34 will urge the ring '62 inwardly. However, slight downward movement of the lock sleeve 62 with respect to the housing will permit the sleeve 62 toexpand outwardly to increase its internal diameter. Thus, downward movement of the body ratchet teeth 60 within the lock sleeve 62 will allow the body to shift within the latter, the

ratchet teeth

60, 61 then meshing with one another; whereupon, any tendency of the body 11 to move upwardly will cause the body to carry the sleeve 62 upwardly and cause the

cam teeth

63, 64 to coenigage and urge the sleeve inwardly to maintain the

ratchet teeth

60, 61 in engagement with each other.

Initially, the body ratchet teeth 60 are disposed above the body lock ring 62, as disclosed in FIG. 211. However, when the slips 31 and packing 26 have been fully expanded against the wall of the tubing string B, the body ratchet teeth '60 are disposed within the body lock sleeve 62 to prevent upward movement of the body 11 with respect to the parts that surround it (FIG. 3b).

The apparatus A can be retrieved from the tubing string B when desired. A tubular mandrel 70 is disposed within the body 11, this mandrel having an adapter or head 71 at its upper end which normally rests upon the upper end of the body 11 and which has an internal thread 72 adapted to receive the thread of a companion member, such as the threaded pin 73 at the lower end of a string of sucker rods D (FIG. 9a). The inner mandrel 70 has an intermediate portion 74 of an external diameter conforming to the internal diameter of the body 11, which is disposed behind the ratchet portion 60 of the body formed on flexible arms 75 provided by circumferentially spaced longitudinal slots 76 ('FIG. 7) extending through the body, so that the arms cannot flex inward-1y. However, the mandrel 70 has a lower relieved portion 77 of a reduced external diameter, which can be placed behind the flexible arms 75 when a coupling or stop nut 78 at the lower end of the mandrel engages .the lower end 79 of the body, thereby removing the backing from behind the flexible arms. When the relieved portion 77 of the mandrel 70 is disposed behind the flexible arms 75 and their ratchet portion 60, the taking of sufficient upward strain on the mandrel 70 will cause the stop nut 78 to engage the lower end of the body 79 and shift the latter upwardly of the body lock sleeve or ring 62, the coengaging tapered

ratchet teeth

60, 61 causing the flexible arms 75 .to cam inwardly and eflfect disengagement of the body ratchet teeth 60 from the sleeve ratchet teeth 61, the body 11 then moving upwardly within the parts that surround it to shift the seating shoe away from the expander 27, allowing the packing element 26 to retract inherently, after which the body shoulder 52 engages the expander shoulder 51 and elevates the latter from its position within and behind the anchor portions 30 of the slips, the springs 44 then rocking the drag portions 43 of the slips outwardly against the tubing string and the anchor portions 30 inwardly from engagement with the wall of the tubing string. Elevation of the mandrel 70 will now effect elevation of the packer A within the tubing string B, allowing the apparatus to be moved to a new location in the tubing string, or removed entirely therefrom.

Upon elevation of the body 111 within the housing 34, the lock pin 35 automatically moves down the long leg 54 of the slot and into the diagonal slot leg 57 back to the No. 2 position, whereupon lowering of the mandrel 70 will shift its enlarged backup portion 74 behind the ratchet tooth arms 75 and engage the adapter head 71 with the upper end of the body 11, lowering of the body again relatively locating the lock pin 35 in the upper end 56 of the short leg 53 of the slot 36. Downward movement of the apparatus A in the tubing string B can now continue with the slips 31 and packing element 26 remaining in their retracted positions.

The apparatus A heretofore described can be associated with the pump C therea'bove in several manners. As disclosed in FIGS. 1 to 3b, the seating mandrel 12 attached to the pump plunger 16 is frictionally and firmly held in the seating shoe 10. The upper end of the pump is connected to the lower end of the solid string of sucker rods D and the combination of apparatus lowered in the tubing string B to the location at which the packer is to be set. When such location is reached, the sucker rods D are picked up a distance amounting to the stroke of the pump, or silightly in excess thereof, which will shift the body 11 upwardly and relatively place the lock pin 35 in the No. 2 position. The sucker rods D are then slacked off while they are turned to the right, which will relatively turn the body 11 and shift it downwardly with respect to the housing 34 and slip structure, the lock pin 35 moving relatively through the diagonal slot 57 to the No. 3 and the No. 4 position, the downward movement effecting full setting of the slips 31 and of the packing element 26 against the well casing, as well as shifting the ratchet portion 60 of the body down within the body lock sleeve 62, as disclosed in FIGS. 3a, 3b. For the purpose of insuring that the tool A is anchored in packed-off condition completely, the sucker rods D can be moved up and down several times to effect a jarring action through the .pump C on the body 11 of the tool, or suflicient weight of the sucker rods may be available for setting down on the tool A through the pump C to firmly embed the upwardly and downwardly facing wickers or

teeth

49, 49a of the slips 31 in the tubing wall, and to shorten and compress the packing element 26 in leakproof sealing engagement with the tubing wall.

The sucker rods D and the traveling barrel 20 of the pump can now be reciprocated to effect a pumping action in the well, the fluid flowing from the formation intothe tubing string 'B and upwardly through the tubular mandrel 70 and the seating mandrel or hold down %2 into the pump C, being discharged from the pump in o the tubing B above the apparatus A.

In the event it is desired to retrieve the pump C, a sufficient strain is taken on the string of sucker rods D to pull the seating mandrel 12 frictionally out of the seating shoe 10, the sucker rods D and pump C then being removed to the top of the well bore. A string of sucker rods D, with the appropriate threaded connection 73 in its lower end, can then be run into the tubing string B and the sucker rods threaded into the mandrel adapter or head 71, whereupon an upward pull is taken on the sucker rods to shift the mandrel 70 upwardly to place its relieved portion 77 opposite the deflecta'ble arms 75 of the body and its coupling nut 78 in engagement with the lower end 79 of the body 11. The taking of a suflicient upward strain on the sucker rods D, mandrel 70 and body 11 will now cause the ratchet teeth 60 to be cammed inwardly of the lock sleeve ratchet teeth 61, since the arms 75 can deflect inwardly as permitted by the relieved portion 77 of the mandrel, the body 11 being shifted upwardly of the housing '34 and of the other parts that surround it for the purpose of allowing the packing element 26 to inherently return to its retracted position and to shift the expander 27 upwardly out of the slips 31, whereupon the springs 44 will shift the anchor portions 30 inwardly from the tubing string (FIGS. 9a, 9b). The packer or anchor A can now be removed from the tubing string B, if desired, by elevating the sucker rods D.

The pump C can be connected directly to the mandrel 70, as by threading the seating mandrel 12 directly to the mandrel adapter head 71a illustrated in FIG. 10. If so connected, release of the packer or anchor A from the Well casing can occur without any need for first removing the pump C from the tubing string B. .It is only necessary to move the sucker rods D upwardly surficiently to pull the mandrel 70 upwardly to the released position, in which the relieved portion 77 is located behind the spring-like ratchet arms 75 of the body, the coupling nut 78 engaging the lower end 79 of the body 11. With such arrangement, the apparatus can be relocked by placing the lock pin 35 in its No. 1 position and the apparatus relocated at any desired point in the tubing string, after which the sucker rods D and pump C can be moved downwardly to shift the mandrel 70 downwardly within the body, the body 11 then being manipulated to place the lock pin in its released position No. 3 once again, for the purpose of then enabling the body to be shifted downwardly with respect to the parts that surround it, and thereby reexpand the slips and packing against the tubing wall. After such setting has occurred, the pump C is operable in its normal fashion. At any time thereafter, the apparatus A can be released from the tubing string B by appropriate manipulation of the sucker rods D, pump C and mandrel 70, and shifted to still a different location, or its complete removal from the tubing string effected.

In the form of apparatus illustrated in FIGS. 11a, 11b, the anchor A is disclosed in combination with hollow sucker rods D through which the well production is to be pumped. When hollow sucker rods are used, the packing element 26 is not desired since it is only necessary to anchor the pump plunger 16 to the tubing string. Under such conditions, the packing 26 is replaced by a helical spring 26a which can be compressed to a final length corresponding generally to the final compressed length of the packing sleeve. This will insure that the ratchet tooth portion 60 of the body will be disposed within the lock sleeve 62 after full anchoring of the slips 31 against the wall of the tubing string.

As shown in FIGS. 11a, 11b, reciprocation of the traveling barrel 20 will cause the well production to move upwardly through the plunger 16, past the standing

valves

18, 19 and the traveling valve 21 into the hollow sucker rods D flowing upwardly therethrough to the top of the well bore. Any gas entrained in the oil can rise to the top of the oil column in the tubing string B externally of the string of sucker rods D inasmuch as there is no packing element present precluding such upward flow of gas. As a result, gas and oil separation is eifected.

The apparatus is illustrated in FIGS. 11a, 11b anchored in the tubing string B. It is operable in the same manner as the other form of the apparatus with respect to its being run in the tubing string, being released therefrom, shifted to a new location in the tubing string, or removed completely therefrom.

It is, accordingly, apparent that a pump assembly has been provided capable of anchoring a pump in the tubing string, and in which the pump can be released and pulled from the tubing string whenever desired, as for replacing valve parts, and the like, without the necessity for releasing and removing the anchor A itself. After replacement of the pump starts, it can be run in the tubing string and its seating mandrel 12 again forced into the seating shoe of the apparatus, in order to anchor the plunger 16 against movement in the tubing string. If it were necessary to remove the anchor apparatus A itself each time the pump needed repair or replacement of parts, difl'iculties might be encountered in view of restrictions in the tubing string resulting from the accumulation of paraffin or scale on the tubing wall. Despite the fact that the anchor or packer A remains in the tubing string, it is readily releasable therefrom whenever desired, and can be reset therewithin.

I claim:

1. In apparatus adapted to be disposed in a tubular string within a well bore: a pump operable by sucker rods; a body to which said pump is releasably secured and from which said pump can be released while said body and pump are in the well bore; normally retracted means on said body; means responsive to manipulation of said body by the sucker rods and pump for expanding said normally retracted means against the tubular string; means for releasably locking said normally retracted means in said expanded condition against the tubular string; and holding means preventing release of said lock ing means when in one position and movable with respect to said body to another position permitting such release.

2. In apparatus adapted to be disposed in a tubular string within a well bore: a pump operable by sucker rods; a body to which said pump is releasably secured and from which said pump can be released while said body and pump are in the well bore; normally retracted anchoring means on said body; means responsive to manipulation of said body by the sucker rods and pump for expanding said anchoring means against the tubular string to anchor said body thereto; means initially preventing outward expansion of said anchoring means and releasable in response to manipulation of said body by the sucker rods and pump to permit such expansion; means for releasably locking said anchoring means in said expanded condition against the tubular string; and holding means preventing release of said locking means when in one position and movable with respect to said body to another position permitting such a release.

' 3. In apparatus adapted to be disposed in a tubular string within a well bore: a pump operable by sucker rods; 21 body to which said pump is releasably secured and from which said pump can he released while said body and pump are in the well bore; normally retracted anchoring means on said body; normally retracted packing means on said body; means responsive to manipulation of said body by the sucker rods and pump for expanding said anchoring means and packing means against the tubular string to anchor said body in leakproof relation thereto; means for releasably locking said anchoring means and packing means in said expanded condition against the tubular string; and holding means preventing release of said locking means when in one position and movable with respect to said body to another position permitting such release.

4. In apparatus adapted to be disposed in a tubular string within a well bore: a pump operable by sucker rods; a body to which said pump is releasably secured; normally retracted means on said body; means responsive to manipulation of said body by the sucker rods and pump for expanding said normally retracted means against the tubular string; coengageable means operatively connected to said body and normally retracted means for releasably locking said normally retracted means in said expanded condition against the tubular string, said locking means including instrumentalities on said body movable inwardly from locking relation to instrumentalities operatively connected to said normally retracted means; and holding means in said body preventing inward movement of said body instrumentalities when said holding means is in one position in said body, said holding means being movable to another position in said body permitting inward movement of said body instrumentalities.

5. In apparatus adapted to be disposed in a tubular string within a well bore: a pump operable by sucker rods; a body to which said pump is releasably secured; normally retracted anchoring means on said body; means responsive to manipulation of said body by the sucker rods and pump for expanding said anchoring means against the tubular string to anchor said body thereto; means initially preventing outward expansion of said anchoring means and releasable in response to manipulation of said body by the sucker rods and pump to permit such expansion, coengageable means operatively connected to said body and anchoring means for releasably locking said anchoring means in said expanded condition against the tubular string, said locking means including instrumentalities on said body movable inwardly from locking relation to instrumentalities operatively connected to said anchoring means; and holding means in said body preventing inward movement of said body instrumentalities when said holding means is in one position in said body, said holding means being movable to another position in said body permitting inward movement of said body instrumentalities.

6'. In apparatus adapted to be disposed in a tubular string within a well bore: a pump operable by sucker rods; a body to which said pump is releasably secured; normally retracted anchoring means on said body; normally retracted packing means on said body; means responsive to manipulation of said body by the sucker rods and pump for expanding said anchoring means and packng means against the tubular string to anchor said body in leakpr-oof relation thereto; means initially preventing outward expansion of said anchoring means and packing means and releasable in response to manipulation of said body by the sucker rods and pump to permit their expansron; coengageable means operatively connected to said body and anchoring means for releasably locking said anchoring means and packing means in said expanded condition against the tubular string, said locking means including instrumentalities on said body movable inwardly from locking relation to instrumentalities operatively cOnnected to said anchoring means: and holding means in said body preventing inward movement of said body instrumentalities when said holding means is in one position on said body, said holding means being movable to another position in said body permitting inward movement of said body instrumentalities.

7. In apparatus adapted to be disposed in a tubular string within a well bore: a pump operable by sucker rods; a body to which said pump is releasably secured; normally retracted means on said body; means responsive to manipulation of said body by the sucker rods and pump for expanding said normally retracted means against the tubular string; said body having laterally deflectable arms and ratchet teeth on said arms; means operatively connected to said normally retracted means and having oompanion ratchet teeth engageable by said arm teeth to releasably lock said normally retracted means in said expanded condition against the tubular string; and holding means in said body behind said arms preventing inward deflection of said arms to prevent disengagement between said teeth, said holding means having a relieved portion adapted to be located behind said arms upon movement of said holding means in said body to permit inward defiecti-on of said arms and release of said arm teeth from said other teeth.

8. In apparatus adapted to be disposed in a tubular string within a well bore: a pump operable by sucker rods; a body to which said pump is releasably secured; normally retracted packing means on said body; an expander on said body engageable with the lower end portion of said packing means; slip means on said body below said expander; drag means fior resisting movement of said slip means in said tubular string; coengageable means on said body and slip means initially preventing relative longitudinal movement between said body and slip means, and releasable in response to manipulation of said body by the sucker rods and pump to permit downward movement of said body to shift said expander behind said slips to expand said slips against the tubular string and to expand said packing element against the tubular string; coengageable locking means on said body and slip means for preventing relative movement therebetween to retain said packing means and slip means in expanded condition against said tubular string, said locking means including instrumentalities on said body movable inwardly from locking relation to inst-rumentalities on said slip means; a tubular mandrel in said body behind said body instrumentalities to prevent inward movement thereof when said mandrel is in one position in said body, said mandrel having a relieved portion adapted to be located behind said body instrumentalities upon upward movement of said mandrel in said body to permit inward movement of said body instrumentalities and their release from said other instrumentalities.

9. In apparatus adapted to be disposed in a tubular string within a well bore: a pump operable by sucker rods, a body to which said pump is releasably secured; an expander on said body; slip means on said body below said expander; drag means for resisting movement of said slip means in said tubular string; co-engageable means on said body and slip means initially preventing relative longitudinal movement between said body and slip means, and releasable in response to manipulation of said body by the sucker :rods and pump to permit downward movement of said body to shift said expander behind said slip means to expand said slip means against the tubular string; coengageable locking means on said body and slip means for preventing relative movement therebetwcen to retain said slip means in expanded condition against said tubular string, said locking means including instrumentalities on said body movable inwardly from locking relation to instrumentalities on said slip means; a tubular mandrel in said body behind said body instrumentalities to prevent inward movement thereof when said mandrel is in one position in said body, said mandrel having a relieved portion adapted to be located behind said body instrumentalities upon upward movement of said mandrel in said body to permit inward movement of said body instrumentalities and their release from said other instrumentalities.

10. In apparatus adapted to be disposed in a tubular string within a well bore: a body; normally retracted means on said body; means responsive to manipulation of said body for expanding said normally retracted means against the tubular string; means for releasably locking said normally retracted means in said expanded condition against said tubular string; and holding means preventing release of said locking means when in one position and movable with respect to said body to another position permitting such release.

11. In apparatus adapted to be disposed in a tubular string within a well bore: a body; normally retracted anchoring means on said body; means initially preventing outward expansion of said anchoring means and releasable in response to manipulation of said body; means responsive to manipulation of said body for expanding said anchoring means against the tubular string to anchor said body thereto; means for releasably locking said anchoring means in said expanded condition against the tubular string; and holding means preventing release of said locking means when in one position and movable with respect to said body to another position permitting such release.

12. In apparatus to be disposed in a tubular string within a well bore: a body; normally retracted means on said body; means responsive to manipulation of said body for expanding said normally retracted means against the tubular string; coengageable means on said body and normally retracted means for releasably locking said norm ally retracted means in said expanded condition against the tubular string, said locking means including instrumentalities on said body movable inwardly from locking relation to instrumentalities on said normally retracted means; holding means in said body preventing inward movement of said body instrumentalities when said holding means is in one position in said body, said holding means being movable to another position in said body permitting inward movement of said body instrumentalities.

13. In apparatus to be disposed in a tubular string within a well bore: a body; normally retracted means on said body; means responsive to manipulation of said body for expanding said normally retracted means against the tubular string; said body having laterally deflectable arms and ratchet teeth on said arms; said normally retracted means having companion ratchet teeth engageable by said arm teeth to releasably lock said normally retracted means in said expanded condition against the tubular string; and holding means in said body behind said arms preventing inward deflection of said arms to prevent disengagement between said teeth, said holding means having a relieved portion adapted to be located behind said arms upon movement of said holding means in said body to permit inward deflection of said arms and release of said arm teeth from said other teeth.

14. In apparatus to be disposed in a tubular string within a well bore: a body; norm-ally retracted anchoring means on said body; means initially preventing outward expansion of said anchoring means and releasable in response to manipulation of said body to permit such expansion; means responsive to manipulation of said body for expanding said anchoring means against the tubular string; said body having laterally deflectable arms and ratchet teeth on said arms; said anchoring means having companion ratchet teeth engageable by said arm teeth to releasably lock said anchoring means in said expanded condition :against the tubular string; and holding means in said body behind said arms preventing inward deflection of said arms to prevent disengagement between said teeth, said holding means having a relieved portion adapted to be located behind said arms upon movement of said holding means in said body to permit I ll inward deflection of said arms and release of said arm teeth from said other teeth.

15. In apparatus :adapted to be disposed in a tubular string within a well bore: a body; normally retracted packing means on said body; an expander on said body engageable with the lower portion of said packing means; slip means on said body below said expander; drag means frictionally engageable with the tubular string to resist movement of said slip means therewithin; releasable lock means on said body and slip means initially preventing substantial longitudinal movement therebetween and releasable by said body to permit downward movement of said body within said slip means to shift said expander behind said slip means and expand said slip means out- Wardly against the tubular string and to expand said packing means :against the tubular string; said body having laterally deflectable arms and ratchet teeth on said arms; said slip means having companion ratchet teeth engageable by said arm teeth to releasably lock said slip means to said body with said slip means and packing means in their expanded conditions against the tubular string; and a tubular mandrel in said body behind said arms prevent-ing inward deflection of said arms to prevent disengagement between said teeth, said mandrel having a relieved portion adapted to be located behind said arms upon upward movement of said mandrel in said body to permit inW-ard deflection of said arms and release of said arm teeth from said other teeth.

16. In apparatus adapted to be disposed in a tubular string within a well bore: a body; an expander on said body; slip means on said body below said expander; drag means frictionally en-gagea-ble with the tubular string to resist movement of said slip means therewithin; releasable lock means on said body and slip means initially preventing substantial longitudinal movement therebetween and releasable by said body to permit downward movement of said body within said slip means to shift said expander behind said slip means and expand said slip means outwardly against the tubular string; said body having laterally deflectable arms and ratchet teeth on said arms; said slip means having companion ratchet teeth engageable by said a-rm teeth to releasably lock said slip means to said body with said slip means in their expanded condition against the tubular string; and a tubular mandrel in said body behind said arms preventing inward deflection of said arms to prevent disengagement between said teeth, said mandrel having a relieved portion adapted to be located behind said arms upon upward movement of said mandrel in said body to permit inward deflection of said arms and release of said arm teeth from said other teeth.

References Cited by the Examiner UNITED STATES PATENTS 2,604,945 7/1952 Page 103219 X 3,020,959 2/1962 Nutter 166134 3,195,643 7/1965 Harbison et al 166-138 CHARLES E. OCONNEL, Primary Examiner.

BENJAMIN HERSH, Examiner.

J. A. LEPPINK, Assistant Examiner.

Claims

1. IN APPARATUS ADAPTED TO BE DISPOSED IN A TUBULAR STRING WITHIN A WELL BORE; A PUMP OPERABLE BY SUCKER RODS; A BODY TO WHICH SAID PUMP IS RELEASABLY SECURED AND FROM WHICH SAID PUMP CAN BE RELEASED WHILE SAID BODY AND PUMP ARE IN THE WELL BORE; NORMALLY RETRACTED MEANS ON SAID BODY; MEANS RESPONSIVE TO MANIPULATION OF SAID BODY BY THE SUCKER RODS AND PUMP FOR EXPANDING SAID NORMALLY RETRACTED MEANS AGAINST THE TUBULAR STRING MEANS FOR RELEASABLY LOCKING SAID NORMALLY RETRACTED MEANS IN SAID EXPANDED CONDITION AGAINST THE TUBULAR STRING; AND HOLDING MEANS PREVENTING RELEASE OF SAID LOCKING MEANS WHEN IN ONE POSITION AND MOVABLE WITH RESPECT TO SAID BODY TO ANOTHER POSITION PERMITTING SUCH RELEASE.