US2002140A - Well equipment - Google Patents

Description

S. V. DILLON WELL EQUIPMENT May 21, 1935.

s sneets sheez 1 Filed Aug. 19, 1952 May 21, 1935. s. v. DILLON 0 WELL EQUIPMENT May 21, 1935. 5 v DILLQN 2,002,140

WELL EQUIPMENT Filed Aug. 19, 1932 3 Sheets-Sheet 3 .5 either upwardly or downwardly regardless of the Patented May 21, 1935 v UNITED STATES PATENT OFFICE 2,002,140 WELL EQUIPMENT Stephen V. Dillon, Tulsa, Okla. Application August 119, 1932, Serial No. 629,542

' 20 Claims) (c1. 103 -219) This invention relates to improvements in well equipment, and more especially to devices .for anchoring or securing tubing or the like in the casing of a well, from vertical movement pressure existing in the well.

While the invention has been devised for the purpose of anchoring a short section of tubing used with -a bottom hole bean or choke, it will be understood by those skilled in the art that the mechanism may be employed inany environment where it is desirable to make a tight connection between the interior of a bore or tubular member suchas a well casing, and the exterior of aninternal member such as well tubing. "Obviously, it will be especially useful in pumping or how- :ing wells.

'Heretofore in anchoring the stationary tubing section of a bottom hole bean device in position,

i it was usually necessary to use the tubing above the bean as a driver or jarring element. In a deep well, as the tubing above the bean is rela. vtively heavy, it is manifest thatvthis'is a dangerous operation, and may not only result in damage to equipment, but in a high pressure well, may result in injury to the workmen. 'Oneof the objects of the present invention is to provide an anchoring mechanism which may be controlled by rotation of the tubing relatively to the well casing, or bore for the purpose of lockingthe device in position or forreleasing the same; the devicefunctioning while in locked position to prevent movement of the tubing either upwardly or downwardly;

Another object of the invention is to combine with such mechanism a guard to prevent tools or the like which may be accidentallydropped in the well from interfering with the successful op- "eration of the device or withdrawal of the anchoring mechanism by the tubing under any circumstances.

A further object is to furnish an anchoring device comprising tubular elements which surround the tubing and are provided with abutrnents adapted in case of breakage of certain parts to cooper-ate with abutments on the tubing, whereby said tubular elements may be removed with the tubing should certain'parts of the mechanism be damaged.

Another object is to supply an anchoring mechanism in which one of said tubular members .carries dogs or slips which cooperate with the -wedge block on the tubing, and said tubular memberprovided with legs or the like designed --to come to rest'on the wedge block in case the withdrawal in case it is found that the part to wedge block to any appreciable extent during showing the zeshaped groove of the wedge block.

itubing should tend to fall. This feature will prevent undue buckling of the reins of the slips, which might interfere with the withdrawal of the anchoring mechanism with the tubing.

A further and important feature of the inven- 5 tion resides in a weight on the tubing designed to be released from elevated positionby turning of the tubing to permit the weight to drop, and by-impact, force the slips or dogs into locking position. Heretofore, a coil spring was usually 10 employed to set the dogs in locking position, and consequently, it was necessary to withdraw the device from the well in order to again place the spring undertension. By employing the weight of my construction, the dogs may be set,released and reset withoutwithdrawal of the mechanism from the well. This feature also makes the mechanism especially advantageous for fishing tool purposes, as the Weight can be controlled from the top of the well, and this makes it possible to set, release and reset the fishing tool from theground surface without withdrawal of the tool. Furthermore, it permits ready withdrawal of the tool for any purpose, for example,

be pulled cannot be extracted in this way.

A still further object is'to combine'with tubing and a wedge block, valve means which will not only prevent well liquid from entering the lowering of the tubing, but which will positively seal the interior of the wedge block against entrance of wellliquid after the anchoring mechanism has been set in position.

With the foregoing objects outlined and with other objects in view which will appear as the description proceeds, the invention consists in the "novel features hereinafter described in de tail, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims.

In the drawings, I

Fig. l is an elevation of my improved anchoring mechanism shown in position on a section of well tubing arranged within a well casing, the latter being shown in vertical section.

Fig. 2 is a similar view of the tubing and casing, but showing the anchoring mechanism in diametrical vertical section.

Figs. 3, 4, 5, 6 and '7 are horizontal sectional views taken respectively on the lines 3-3, 4-4, 5-5, 5-6 and I-'Ia0f. Fig. 1.

Fig. 8 is a diametrical vertical sectional view of'the wedge block with the tubing removed and Fig. 9 is a side elevation of one of the lug assemblies which is arranged on the tubing and cooperates with the wedge block slot means.

Figs. 10, 11, and 12 are horizontal sectional views of the same, taken respectively on the lines Ill-i0, H-ll and l2l2 of Fig. 9.

Fig. 13 is a perspective view looking at the bottom of the upper one of the fixed rings of said lug assembly. I

Fig. 1% is a perspective view of the loose ring of said assembly.

Fig. 15 is a perspective View of the other one of the fixed rings of said assembly.

Referring to the drawings, 9 designates an internal member and it an external member. For the purpose of disclosing the invention, it will be assumed that 9 is the tubing and If) the casing of an oil well, but it will be apparent to those familiar with such equipment that my mechanism may be employed to provide an effective lock'between an internal and an external member, and

which may be set or released by the turning of the internal member relatively to the external memher.

The members 9 and i0 must be vertically arranged, and they cooperate with an anchoring mechanism comprising first a wedge block H. second a slip carrying sleeve or the like I2, and third a weight I3, all mounted in superposed relation. 1

The wedge block is preferably of tubular form and the tubing passes through the bore of the same, and for the purpose of temporarily pre- 1 venting the wedge block from dropping downwardly on the tubing or from turning in the casing, the wedge block is provided with a number of arms M having ends fixed to the wedge block by any suitable means such as screws 85. These arms are formed of resilient material and they may be leaf springs which frictionally engage the inner surface of the casing with sufiicient pressure to always support the weight of the wedge block in the casing 18.

Externally, the wedge block is preferably provided with pairs of guide fingers It; the pairs being staggered with relation to the friction arms I 4 to prevent interference with the latter. The guide fingers function as guides or retainers for the reins ll of dogs or slips l8, which depend from and are suitably connected with the sleeve I 2. The reins are preferably pivotally connected to the sleeve as at E9, and owing to the form of each rein, its dog or slip is held in engagement with an inclined surface 28 of the wedge block.

It will be noted that the inclined surfaces 20 of the wedge block in the present invention are inclined upwardly and inwardly toward the axis of the tubing, whereby upward movement of the block by pressure within the well, or upward pulling on the tubing will tend to wedge the slips is into tighter engagement with the casing Hi.

The bore of the wedge block, as best shown in Figs. 1 and 8, is provided with a substantially Z-shaped groove or slot means 2! having a vertical portion 22 provided at its upper end with a horizontal portion 23 extending in one direction, and provided at its lower end with a horizontal portion 24 extending in the opposite direction. This groove is provided to form abutments within the wedge block to cooperate withlugs 25 and 26 on the tubing. In accordance with the invention, the lug 25 is positioned above the lug 2G, and each lug is integral with or fixed to a ring 21 loosely mounted on the tubing. Each ringl21 can rotate between a pair of rings 28 and 29, fixed to the tubing, and for the purpose of urging the lugs 25 and 26 in opposite directions, a coil spring 30 is provided for each lug assembly. One end of each coil spring is secured to the loose ring as shown at 3!, and has its other end anchored to the fixed ring 29 as at 32. Each of the fixed rings 28 is provided with an abutment or stop 33 adapted to engage one of the lugs 25, 26, and when the tubing is turned in a counter-clockwise direction, the upper one of the fixed lugs, as well as the upper lug 25 simply turns with the tubing, and the lug 25 travels in a counter-clockwise direction in the horizontal portion 23 of the groove 2! of the wedge block. At this time, the lower lug 28 is in the vertical portion 22 of the wedge block groove, and as the lower fixed abutment 33 moves with the tubing while the lug 26 cannot move with the same, the spring 30 of the lower lug 26 is tensioned. When the upper lug 25 reaches the vertical portion 22 of the groove, due to the turning of the tubing, it will be understood, if the tubing is now lowered relatively to the wedge block, that the lower lug 26 will be brought into register with the lower horizontal portion 24 of the groove, and as the lower lug 26 is under tension, it will spring or snap into the portion 24 of the groove under the influence of the tension spring of the lower lug.

In this way, as will be more fully explained later, the parts may be anchored in position. To release, the tubing is turned in the opposite direction, and therefore, the lower lug 26 will positively travel in a clock-wise direction with the fixed rings on the lower assembly, without any dependence on movement of the lug by the spring of the lower assembly, thereby assuring absolute withdrawal at any desired time. This movement will bring the lower lug 26 into regis tration with the vertical portion 22 of the groove, but as the upper lug 25, due to its engagement with the Vertical portion of the groove, is prevented from turning at this time, it will be understood that its spring is thus placed under tension. Therefore, if the tubing is now lifted so as to cause both lugs 25 and 26 to travel upwardly in the groove 2!, as soon as the upper lug comes into register with the upper horizontal portion 23 of the groove, the lug 25, under the influence of its spring, will now snap into the portion 23 of the groove, and will'then act to provide means which will force the wedge block down with the tubing if the latter is lowered.

Provision is also made to permit relative movement between the tubing and the parts l2 and 13. Each of these parts is preferably provided in its bore with diametrically opposite L-shaped grooves 34 each consisting of a vertical portion 35 and a horizontal portion 36. The tubing has fixed rings 37 and 38 provided with oppositely extending fixed lugs 39 and 4B, which work in the grooves 34. When the lugs 39 and 56 are occupying the horizontal portions of the grooves 33, it is obvious that the weight it and sleeve I2 will move either upwardly or downwardly with the tubing. However, in order that the device may function properly, these parts (I2, l3) are so connected with the wedge block I I as to be prevented from turning. The reins I! of the slips prevent the sleeve l2 from turning relatively to the wedge block, and the sleeve has upwardly extending arms il which operate in guide grooves 42 of the weight to prevent the latter from turning with reference to the sleeve. Manifestly then, if the tubing is'turned with reference to the wedge block the tubing will also turn rela- 3 $002,140? .tively to the sleevev |2and .weight|3,*and' this wardly-relatively to the wedge block.

As a safety measure, it will be noted that the fixed rings 3i and 38 are of a diameter to slide vertically in the bores 63 of the weight and sleeve, and in case of breakage of the lugs 39 or 40, the collars, or one of them can come into engage ment with removable closure plates 44 positioned at the tops of the weight and sleeve. These cover plates will form abutments which may be engaged by the collars so as to cause lifting of the weight or sleeve with the tubing even though thelugs 39 and ill should be broken off. a I

For further. protection, a guard 45 is positioned above the weight and is fixedly secured'to the tubing for preventing any article falling in the Well from damaging the anchoring mechanism parts or preventing the withdrawal of the mechanism. Thisguard preferably consists of about four bowsprings positioned at 90 relatively to one another and having their ends secured to the tubing in any suitable way. A net 46'0f wire mesh or the like, and of annular form, has its inner edge secured to the tubing by any suitable ,means, and its outer edge connected to the medial portions of the bow springs,'so that the net is held in stretched or taut condition bythe springs, and any articlefallinginto the well will land uponthis net. and will be prevented from :reaching the. anchoring mechanism. Furthermore, when the anchoringmechanism is withdrawn with the tubing, the net will lift such articles out of the well. Such a net will, of course, allow passage of fiuid between the'tubing and casing.

It is desirable to seal the interior of the wedge block against the entrance of well fluid for the purpose of protecting the internal mechanism. Therefore, I have provided the upper end of the wedge block with a cap 41 which issecured to the upper end of the wedge block and in which the tubing slides. In addition, the tubing has a valve ring 43 of any suitable material which moves with the tubing, but is adapted to seat on an annular ledge 49 within the wedge blockwhen the tubing is lowered relatively to the wedge block and the mechanism is set in' position. Manifestly, the cap GT and valve 48 prevent the passage of well fluid into the portion of the bore occupied by the abutment lug assembly.

A rugged collar '50 of any suitable material will be welded or threaded on to the tubing below the anchoring mechanism and serve as a stop or abutment for the wedge block in case breakage of some of the parts might permit the wedge block to fall on the tubing below the position shown in Figs. 1 and 2. a

To prevent buckling of the slip reins H, in case of failure'of some of theparts, the sleeve I2 is preferably provided with legs 5| designed to come to rest on the top of the wedge block I I.

In operation, assuming the mechanism is to be lowered into the well with the tubing, the lugs '39 and 48 will be occupying the horizontal portions of the grooves 34 to-prevent dropping of the weight and sleeve on the tubing The upper ends of the slips i8 will-also 'be engaging the tension; i

this time. the tubing, the lower lug 26 will be brought into fingers'lfi'to prevent falling of the wedge block, but at the same time, the friction arms M on the Wedge block are strong enough to prevent the falling or said block. As a matter of fact, the spring arms 14 will be of such strength as to require the pushing of the wedge block down into the well. i

I After the parts have been loweredto the position where it is desired to anchor the same, the

tubing will be turned in a counter-clockwisedirection. This will cause the lugs 39 and 40 to move into registration with the vertical portions of the grooves 34. At the same time, the upper lug of the wedge block will move in the horizontal portion. 23 of the slot 2| into registration with the vertical portion 22 of the slot 2| without tensioning the spring of the upper lug 25, but as the lower lug 26 is already in the vertical portion 22 of the slot 2| during this turning movement, the spring of the lower lug will be placed under As soon as the lugs 25, 39 and 49 come into registration with the vertical portions of their respective grooves, the sleeve l2 and weight l3 will drop so asto wedge the dogs l8 between the Wedge block and the casing. At the same time,

however, the wedge block ll, due to its friction spring arms I4, is prevented from dropping, so that the lugs 25 and 26 will simply descend into thevertical portion 22 of the groove 25. Nowif the tubing is lowered, the lugs 39 and 48 will travel down the vertical portions of their slots, as the slips |8 and wedge block will prevent the parts I2 and Hi from moving downwardly at During this downward movement of registration with the horizontal portion 24 of the groove 2|, and therefore, the lug 26, which is under the tension of its spring, will snap into the portion 24 of the groove 2| and lock the parts in position.

Should it at a later time be desired to release or reset the parts, the tubing will be turned in a clock-wise direction, and this will cause the lugs 39 and 40 to move into the horizontal portions of their slots, and the lug 26 to move into registration with the vertical portion of its slot. At'the same time, as the upper lug 25 is held against turning movement by the vertical portion of its slot, its spring will be put under tension. Now if thetubing is lifted, the parts 12 and I3 will rise with the tubing, but the lugs 25 and 26 will simply travel upwardly in their slot relatively to the wedge block, and as soon as the upper lug 25 comes into registration with the horizontal portion 23 of its slot, it will snap into this portion 23 and then the parts may be eitherraised orlowered as a unit, and they will be inthe samerelative positions as when they entered the well.

While I have disclosed what I now consider to be a preferred embodiment of the invention in such manner that the same may be readily understood by those skilled in the art, I am aware that changes maybe made in the details disclosed and that the essential elements of the same may be used for various purposes, without departing from the spirit of the invention, as expressed in the claims.

What I claim and desire to secure by Letters Patent is:

lgAnohoring .mechanism for anchoring an elongated internal member to the surface of a bore, comprising a sleeve and wedge block, both arranged .on theinternal memben'thelatter having limited movement relatively to "said sleeve and wedge block, slips connected to the sleeve and cooperating with the wedge block for locking the latter to the surface of said bore and preventing upward movement of the wedge block relatively to the bore, means actuated by said internal member for setting the slips relatively to the wedge block, for releasing the slips from the wedge block and for withdrawing the sleeve, slips and wedge block from the bore with said internal member, said last mentioned means preventing the internal member from rotating a complete revolution relatively to the wedge block, and friction means carried by the wedge block for friotionally supporting the wedge block in the bore againstdownward or turning movement.

2. An anchoring device for use in securing an elongated internal member to'the surface of a bore, comprising a sleeve and a wedge block mounted on the internal member, said member being movable relatively to the sleeve and wedge block, slips carried by the sleeve and cooperating with the wedge block for interlocking the latter with the surface of said bore, and means interlocking the sleeve and wedge block to the internal member for preventing movement of the wedge block in either direction axially of said bore and for preventing the internal member from rotating' a complete revolution relatively to said wedge block.

3. An anchoring device for use in securing an elongated internal member to the bore of a vertical tubular member, comprising a sleeve and a wedge block mounted on the internal member, said member being movable relatively to the sleeve and wedge block, slips carried by the sleeve and cooperating with the wedge block for interlocking the latter with the surface of said bore, and means interlocking the sleeve and wedge block to the internal member for preventing movement of the wedge block in either direction axially of said bore and for preventing the internal member from rotating a complete revolution relatively to said wedge block.

4. Anchoring mechanism for anchoring an elongated internal member tothe surface of a bore, comprising a sleeve and wedge block, both arranged on the internal member, the latter having limited movement relatively to said sleeve and wedge block, said wedge block having its smaller end uppermost slips connected to the sleeve and cooperating with the wedge block for locking the latter to the surface of said bore, means actuated by said internal member for setting the slips relatively to the wedge block, for releasing the slips from the wedge block, and for withdrawing the sleeve, slips and wedge block from the bore with said internal member, friction means carried by the wedge block for frictionally supporting the wedge block in the bore against downward or turning movement, and a weight supported by the internal member and releasable by movement of the latter for driving the slips into tighter engagement with the wedge block and the bore, said weight being movable relatively to said'wedge block.

5. An anchoring device for use in securing an elongated internal member to the surface of a bore, comprising a sleeve and a wedge block mounted on the internal member, said member being movable relatively to the sleeve and wedge block, said wedge block having its smaller end uppermost, slips carried by the sleeve and cooperating with the wedge block for interlocking the latter with thesurface of said bore, means interlocking the sleeve and wedge block to the internal member for preventing movement of the wedge block in'either direction axially of said bore, and a weight supported by the internal member and releasable by movement of the latter for driving the slips into tighter engagement with the wedge block and the bore, said weight being movable relatively to said wedge block.

6. An anchoring device for use in securing an elongated internal member to the bore of a vertical tubular member, comprising a sleeve and a wedge block mounted on the internal member, said member being movable relatively to the sleeve and wedge block, said wedge block having its smaller end uppermost, slips carried by the sleeve and cooperating with the wedge block for interlocking the latter with the surface of said bore, means interlocking the sleeve and wedge block to the internal member for preventing movement of the wedge block in either direction axially of said bore, and a weight supported by the internal member and releasable by movement of the latter for driving the slips into tighter engagement with the wedge block and the bore, said weight being movable relatively to said wedge block.

7. Anchoring mechanism for anchoring an elongated vertical member within a vertical bore, comprising a weight, a sleeve and a wedge block, all substantially surrounding said internal member, said internal member being movable vertically and rotatably relatively to the weight, sleeve and wedge block, interlocking means between the internal member and the weight, sleeve and wedge block for normally holding said parts in predetermined spaced relations and adapted through movement of the internal member relatively to the'weight, sleeve and wedge block, to release the weight and sleeve and to permit these parts to fall relatively to the wedge block, friction means secured to the wedge block for frictionally supporting the latter within the bore, and slips connected to the sleeve and cooperating with the wedge block for tightly securing the wedge block to the bore.

8. Anchoring mechanism for anchoring an elongated vertical member within a vertical bore, comprising a weight, a sleeve and a wedge block, all substantially surrounding said internal member, said internal member being movable vertically and rotatably relatively to the weight, sleeve and wedge block, interlocking means between the internal member and the weight, sleeve and wedge block for normally holding said parts in predetermined spaced relation and adapted through movement of the internal member relatively to the weight, sleeve and wedge block, to release the weight and sleeve and to permit these parts to fall relatively to the wedge block, friction means secured to the wedge block for frictionally supporting the latter within the bore, and slips connected to the sleeve and cooperating with the wedge block for tightly securing the wedge block to the bore, said interlocking means being so arranged as to restore the weight and sleeve into original position when the internal member is moved in a certain way, including a circular movement.

9. Anchoring mechanism for anchoring an elongated vertical member within a vertical bore, comprising a weight, a sleeve and a wedge block, all substantially surrounding said internal member, said internal member being movable vertically and rotatably relatively to the weight, sleeve and wedge block, interlocking means between the internal member and the weight, sleeve and wedge block for normally holding said'parts in predetermined" spaced relation' and adapted through movement of the internal memberrela-- tively to the weight, sleeve and wedge block, to-

release the weight and sleeve and to permit these parts t'o fall relatively to the wedge block, friction means secured to the wedge block for frictionally supporting the latter within the bore, and slips connected to the sleeves andcoopera'ting with the wedge block for tightly securing the wedge block to the bore, said interlocking means acting to' restore the weight and sleeve to original position after the parts have been anchoredby movement of the internal member'first circularly and then upwardly.

10. Anchoring mechanism for anchoring an elongated vertical member within a vertical bore, comprising a weight, a sleeve and a wedge block, all substantially surrounding said internal memher, said internal member being movable vertically and rotatably relatively to the weight, sleeve and wedge block, interlocking means between the internal memberand the weight, sleeve and wedge block for normally holding said partsin predetermined spaced relation and adapted through movementof the internal member relatively to the weight, sleeve and wedge block, to release the weight and sleeve and to permit these parts to fall relatively to the wedge block, triction means secured to the wedge block for frictionally supporting the latter within the bore, and slips connected to the sleeve and cooperating with the wedge block for tightly securing the wedge block to the bore. said interlocking means including a substantially Lshaped slot and lug interconnecting the weight to the internal momber. r

11. Anchoring mechanism :for anchoring an elongated vertical member within a vertical bore,

comprising a weight, a sleeve anda wedge blo'ck,.

all substantially surrounding said internal member, said internal member beingmovable vertically and rotatably relatively to the weight,

sleeve and wedge block, interlocking means between the internal member and the weight, sleeve.

and wedge block for normally holding said parts in predetermined spaced relation and adapted through movement of the'internal member relatively to the weight, sleeve and wedge block, to release'the weight and sleeve and to permit these parts tofall relatively to the wedge block", friction means secured to the wedgeblock for-fric.- tionally' supporting the latter within the'bore,

and slips connected to the sleeve and cooperat-- ingwith the wedge blocklfor tightly securing the wedge block to the bore, said interlocking means including a cooperating substantially L-shaped slot and lugs ecuring the sleeve to said internal member.

12. Anchoring mechanism for anchoring an elongated vertical member within a vertical bore, comprising a weight, a sleeve and a wedge block, all substantially surrounding said internal member, said internal member being movable vertically and rotatably relatively to the weight, sleeve and wedge block, interlocking means between the internal member and the weight, sleeve and wedge block for normally holding said parts in predetermined spaced relation and adapted through movement of the internal member relatively to the weight, sleeve and wedge block, to release the weight and sleeve and to permit these parts to fall relatively to the wedge block, friction means secured to the wedge block for frictionally supporting the latter within the bore,

and slips connected to the sleeve and cooperating with the wedge block for tightly securing the wedge block to the bore, said interlocking means including a. substantially Z-shaped slot and a plurality of lugsconnecting the internal member to said wedge block.

13. Anchoring means of the class described for securing an elongated internal member to the surface of a bore, comprising a wedge block mounted on the internal member between the latter and the surface of the bore, slips cooperating with the wedge block and adapted to be wedgedagainst the bore by the wedge block, said internal member extending through and being-movable within the wedge block, and means interlocking the wedge block to the internal member, the last mentioned means including slot and mounted on the internal member, and springs tensioned by relative movements between the internal member and the wedge block for urging one of said lugs into one of thesubstantially hori-' zontal portions of the slot means and for urging the other one of the lugs into the other substantially horizontal portion of the slot means.

14'. In anchoring mechanism for securing an elongated internal memberto the surface of a bore in which theinternal member is arranged, a tubular element arranged between the internal member and the bore andsubstantially surrounding the internal member, said element being provided with internal slot means including substantially horizontal portions, pairs of rings fixed to the internal member, one ring of each pair having an abutment surface, a loose ring arranged between the rings of each of the fixed pairs of rings, lugs rigidly united with the loose rings and cooperating with the abutments oil the fixed rings and also with said slot means, and springs connecting the loose rings to one of the fixed rings of each pairfor urging one of the lugs in one directionandthe other lug in the opposite. direction, said springs being, tensioned by movement of the internal member relatively to the tubular element whilesaid-lugs are 0celongated vertical member within a vertical bore,

comprising a weight, a sleeve and a wedge block,

all substantially surrounding said internal memher, said internal member being movable vertically and rotatably relatively to. the weight, sleeve and wedge block, interlocking means between the internal member and the weight, sleeve and wedge block for normally holding said parts in predetermined spaced relation and adapted through movement of the internal member relatively to the weight, sleeve and wedge block, to release the weight and sleeve and to permit these parts to fall relatively to the wedge block, friction means secured to the wedge block for frictionally supporting the latter within the bore, slips connected to the sleeve and cooperating with the wedge block for tightly securing the wedge block to the bore, said wedge block being provided with a bore, and means for sealing the last mentioned bore against the entrance of fluid.

16. Anchoring mechanism for anchoring an elongated vertical member within a vertical bore, comprising a weight, a sleeve and a wedge block, all substantially surrounding said internal member, said internal member being movable vertically and rotatably relatively to the weight, sleeve and wedge block, interlocking means between the internal member and the weight, sleeve and wedge block for normally holding said parts in predetermined spaced relation and adapted through movement of the internal member relatively to the weight, sleeve and wedge block, to release the weight and sleeve and to permit these parts to fall relatively to the wedge block, friction means secured to the wedge block for frictionally supporting the latter within the bore, slips connected to the sleeve and cooperating with the wedge block for tightly securing the wedge block to the bore, said interlocking means including a ring fixed to the internal member and provided with'a. radially projecting lug, a substantially L-shaped groove in one of said members into which the lug projects, and a cover plate connected to said member and functioning in case of accident as an abutment for said ring.

1'7. Anchoring mechanism for anchoring an elongated vertical member within a vertical bore, comprising a weight, a sleeve and a wedge block, all substantially surrounding said internal member, said internal member being movable vertically and rotatably relatively to the weight, sleeve and wedge block, interlocking means between the internal member and the weight, sleeve and wedge block for normally holding said parts in predetermined spaced relation and adapted through movement of the internal member relatively to the weight, sleeve and wedge block, to release the weight and sleeve and to permit these parts to fall relatively to the wedge block, friction means secured to the wedge block for frictionally supporting the latter within the bore, slips connected to the sleeve and cooperating with the wedge block for tightly securing the Wedge block to the bore, and vertical projections for permanently spacing the sleeve from the wedge block to limit the movement of the sleeve toward the wedge block.

18. Anchoring mechanism for anchoring an elongated vertical member within a vertical bore, comprising a, weight, a sleeve and a wedge block, all substantially surrounding said internal member, said internal member being movable vertically and rotatably relatively to the weight, sleeve and wedge block, interlocking means between the internal member and the weight, sleeve and wedge block for normally holding said parts in predetermined spaced relation and adapted through movement of the internal member relatively to the weight, sleeve and wedge block, to

release the weight and sleeve and to permit these parts to fall relatively to the wedge block, fric-- 'tion means secured to the wedge block for frictionally supporting the latter within the bore, slips connected to the sleeve and cooperating with the wedge block for tightly securing the wedge block to the bore, and a guard mounted on the internal member above said weight,- and comprising bow springs radially positioned relatively to the internal member and having their ends fixed to the internal member, and an annular net surrounding the internal member and having its inner edge secured to the internal member, and its outer edge secured to the medial portion of the bow springs.

19. The combination with well tubing, of means for anchoring the same within a well, comprising a wedge block surrounding the tubing, a sleeve surrounding the tubing and arranged above the wedge block, friction means carried by the wedge block and adapted to engage the bore of the well for supporting the wedge block in said bore, slips'connected to the sleeve and cooperating with the wedge block for wedging the slips into locking position between the wedge block and the well bore, slots in the sleeve and wedge block having substantially vertical and substantially horizontal portions, and lugs mounted on the tubing and projecting into said slots, for causing relative movement between the sleeve and wedge block when the tubing is moved in a certain manner, whereby the slips may be set or released by relative movement between the tubing and sleeve and wedge block.

20. Anchoring mechanism for anchoring an elongated internal member to the surface of a.

bore, comprising a sleeve and wedge block, both arranged on the internal member, the latter having limited movement relatively to said sleeve and wedge block, slips connected to the'sleeve and cooperating with the wedge block for looking the latter to the surface of said bore and preventing upward movement of the wedge block relatively to the bore, means actuated by said internal member for setting the slips relatively to the wedge block, for releasing the slips from the wedge block and for withdrawing the sleeve,

slips and wedge block from the bore with said internal member, said last mentioned means preventing the internal member from rotating a complete revolution relatively to the wedge block, and friction means for frictionally supporting the wedge block in the bore against downward or turning movement.

STEPHEN V. DILLON.

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