US1028759A - Well-tubing lock. - Google Patents

Description

A. K. McKEE.

WELL TUBING LOOK.

ABPLIOA'LION FILED APR. 27, 1911.

1,028,759, Patented June 4, 1912.

2 SHEETS-SHEET 1.

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Znoentors 'Clttomegs.

A. K. MOKEE.

WELL TUBING LOOK.

APPLICATION. FILED 11.27, 1911.

1,028,759. Patented June 4,1912.

2 SHEETS-SHEET 2.

I I d 2 9/ 6/ 2 3nventors witnesses t I 4 attorneys I UNITED STATESPATENT orrrca BRAY AND ONE-THIRD TO THOMAS COX; JR, BOTH F COALINGA, CALIFORNIA.

ELL-worms LOCK.

Specification bf Letters P t t- I Patentedjunet,

I +To all whom it may concern: I

.Locks; and .I do hereby declare the fol- Be it known that I, ALBERT McKee,

a citizen of the United States, residinvi'at Coalinga, in the county of Fresno and gtate of' California, have invented certain new and useful Improvements in ,Well-Tubing lowing to be a full, clear, and exact descrip'tion ofthe invent-ion, such as. will enable others skilled in the art to which it appertains to make and use the same.

This invention relatesto locks for oil wells and has for its object ,tdprovide means secured to the lower end of a pump tubing. to" be locked to the inner wall of a well casing and adapted to carry the-entire strain. of the pump tubing above said'lock.

Another object is to PIOVIdB 'a lock capable of being secured to the well casing at any elevation and if so desired can be dis. engaged and raisedor'lowered to any other desired elevation. Another object is to provide a lock having jaws which may be made of great length so as to distribute the weight. over a great area on the inner wall of the well casing.

Further objects will be apparent from the following specification, appended claims and drawings thereof, in wh1ch:-

- Figure 1 is a vertical section through a well casing showing my invention therein.

Fig. 2 is a horizontal section as on the line 2-2 of Fig. 1. Fig.3 is a'verticalsectional View at right angles to Fig. 1. F1g. l is a vertical sectional view through a mouse trap as applied to my invention. Fig. 5

is a sectional view showing a modification of my invention as applied to the lock. Fig. 6 is a perspective view thereof.

Referring more specifically to the drawings there is shown a,well casing 10 having a pump tubing at the lower end thereof as by threads is a cylindrical shell 12, the upper pump tubing 11 therein and secured to said end of which is provided with a plurality Y of perforations 13 for the admission of oil I orvthe like to the pump. The shell 12 is in "10 tu ing. Inorder to hold the washer 19 depressed 'a ueatinn a1ea4 n1iaa'1a1i. Serial No. 623,695.

v ALBERT K. MQKEE, O]? COALINGA, CALIFORNIA, ASSIGNOR OF ONE- THIRD '10 EUSTACE I tail ribsQI S are' ada ted to slide flanges 14, the outer: aces ofsaid slips be-i walls ofthe casin raised. obliquely with respect to the shell 12.

- Arranged to slide vertically on the lower end of the shell 12 is a. flanged washer 19 the flange thereof being ada ted to bear shell 12 below thewasher and said spring 1s in compression between thewasher 19 and airetaming nut 21 screwed onto the lower end of said casing. This springtends to 'raise the washer which in turn raisesthe 'ingserrated 'and adapted to bite into the;

10 when said slips are against the lower ends of the s ips 16. Ar-, ranged to bear against the under face of said washer 153, spring 20 coiled; about the slips '16, causing them to; move obliquely and jam between the wall of the casing 10 and the flanges 14, thereby holding the shell 12 in locked position in respect to theicas which 1n turn supports the pump asfor raising ore-lowering the lock intothe' casing 101 provide a kev v22 which is ary ranged to pass through the slots 23 diametrically opposite one anotherrin the shell 12 and the ends of the key are arranged to bear on theupper face of the washer 19. In order to keep the key 22 depressed I provide a we ight 2 l which has a reduced shank 25 which is further reduced so .as to form-a head 26 which has a shoulder Q'Z'arranged.

to receive a resilient'member 28 carried by; the f mouse ,trap 29. "The Weight 24; is V sufliclent to overcome 'the' tension of" the spring 20 audit is seen that by resting the; 1

weight .24 on the key 22 the; washer will 7 I move downwardly with respect to the shell 12 which in turn will-permit the tubing and shell 12. to be 'raisedand thereby will allow the slips 16 to fall into bearing rela-' tion with the washer 19,'this permitting the lock to be raised or lowered, or in other words disengagedfrom the casing 10. It is g as :shown in Fig. 4 but by having a weight working in conjunction with the mouse eas1er ,to manage or control the lock than if tubing which ,in turn would have to be handled. 101'. in other words by lowering] I relation with the the weight 24 into bearing b h 29 can e wit key 22 the 'mousetrap .100 not necessary to really have a mouse trap v I drawn or removed from the tubing and the latter will reniain in free condition with respect to the casing 10 and when the tubing and lock are moved to the desired position by lowering the mouse trap as shown in Fig. 4 the resilient member 28 will yield to permit the same'falling low enough as to allowt-he upper end of the member 28 to engage under the shoulder 27 of the weight whereby the same may be raised from the lock which in turn releases the key 22 and permits'the slips 16 to be engaged into the casing 10. In lowering the weight into the tube I remove the removable screw 30 from the mouse trap and engagethe upper end of the resilientmember 28 within-the slot 26 formed in the head v26 of the weight and when the weight is lowered to its extreme movement the resilient member 28 falling low enough disengages from the slot 26 and releases the same permitting thea mouse trap to be raised from the tubing. As shown in Figs. 5 and 6 of the drawing there is a breakable key 31 which is intended to be made of cast iron or any other brittle metal and said member is adapted to pass through diametrically opposite slots 32 in the shell12 and also bear upon the Washer 19 and by'the' compression of the spring 20 the parts assume the position shown inFig. 5 which permits the slips 16 to remain in their lower position enabling the lock to be lowered into the well casing 10. The openings 32 merge into'notchesfi32 which permit the key 31 to be inserted more easily in position, and also to be properly adjusted after having been inserted. When the lock has been lowered tothe desired depth a piece of tubing is lowered within the pump tubing and intended to' break the member 31 whichwill drop to the bottom of the casing 10, then the washer will exert its energy on the slips 16 which will cause them to bite into the casing 10.

By the application of the key 31-it is evident that after the lock has been positioned in the casing 10 it isimpossible to lower the same without withdrawing the entire tubing and replacing another key but by the applioation of the key 31 in conjunction with thekey 22 it is seen that the lock may be lowered initially to any depth and the several parts sprung into locking position, the remains of the key 31falling to the bottom of the casing 10 will permit the key 22 to assume the position shown in Fig. 1 and when it is desired to change the relative position of the lock with the casing the application of the weight 24: will disengage the slips 16 from the casing and permit any movement of the lock desired.

The operation of the device is obvious from the foregoing but in wells where the tubing is supported from above or from locks which are above the pump therein with respect to the shell.

more or less trouble in the parts of the tubing which become affected by the reciprocation of the pump rod such as by wearing to a thin shell which eventually breaks and falls or becomes bent and it is quite diflicult to remove such portions of rod from the well but in my invention the entire strain is carried by the lock and there are no depending portions therefrom which have any strain exerted thereon and when it is desired to remove the lock and tubing for-renewal the entire tubing and lock may be drawn upwardly because of the slips 16 having a downward and inward movement.

1. A tubing lock for wells comprising .a shell adapted to support a tube within a casing upwardly flaring flanges on said shell formed with grooves, slips slidable obliquely on said flanges, tongues on said slips engageable in the grooves in said flanges, a

vertically slidable flangedwasher carried by said shell,'below the flangesthereon and a spring incompression below said washer and tending toraise the same, the flange of said washer bearing againstthe ends ofsaid slips, and means to hold said spring so as to continuously press against said washer.

2. In a'lock for tubing in wells, a casing, a tube within said casing, a shell secured to said inner tube, flaring projections on said tions, a'flanged washer carried by said shell and in bearing relation with said slips, a nut carriedtby the end of said shell, a spring shell, slips slidably carried by said projecwasher and a'removable key carried by said shell arranged to hold the washer depressed 3. In a tubing lodk for-wells, combinathereon, slips engageable with and slidable on said projections, serratedfaces of said slips adapted to casing, a flanged. washer slidable vertically on said shell and adapted to control the oblique movement of saidslips, means to raise said washer wit-h respect to the shell, a key carried by said shell and a weight adapted to depress said key against the means for raising the washer. 1

4. In a tubing look, a shell, flaring flanges thereon, slips carried by said flanges, a

flanged washer carried by said shell and tion with a shell having flared projections bite into the inner wall of a 100 in compression between said nut and flanged means below said washer tending to raise the sameand a plurality of keys carried, by said shell and adapted to bear against said Washer in opposition to the means for rais ing the same, one of said keys being capable of being broken and dislodged from said shell when desired.

6. In a tubing look, a shell formed with Walls having slots therein, slips carried thereby, a flanged washer carried by said shell and adapted to control the movement of the slips, a key carried by said shell in said slots, a weight adapted to bear on said key and oppose the movement of said washer, a tubular shell, and a spring in said tubular shell adapted to engage with said weight in raising and lowering the same.

7. In a tubing look, a shell, upwardly and outwardly movableslips carried thereby, a

flanged washer slidable vertically on said shell and adapted to bear against said slips,

meansbelow said Washer tending to raise the same, a key carried by said shell and adapted'to bear against said washer in 0pposition to the means for raising the washer, said key being capable of being broken and dislodged from said shell, a weight adapted to be lowered into said shell, said weight being formed with a recessed head, an auxiliary shell, a resilient member arranged in 'said auxiliary shell adapted to fit into the recess in said weight when the weight is lowered into said first mentioned shell, and means carried by said auxiliary shell for causing the spring to engage said recess when it is desired to raise the weight.

In testimony whereof I aflixmy signature in presence of two Witnesses.

BERT K. McKEE. Witnesses:

THOMAS-COX, J r., W. H. FRASER.-

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