US1118538A - Safety tubing-anchor. - Google Patents

Description

D. L. DEISCOLL.

SAFETY TUBING ANCHOR.

APPLICATION FILED PEB.24,1914.

1, 1 18,538, Patented Nov. 24, 1914.

2 BHEETS-BHEET 1.

1N VEN TOR.

fihzul/ adrenal! D. L. DRISGOLL.

SAFETY TUBING ANCHOR.

APPLICATION FILED FEB. 24, 1914.

1 1 1 8, 5 38 Patented Nov. 24, 1914.

2 BHIIETSSHBBT 2.

, 5. r g zz if L Ea J. L l o -24 7 1 4 f INVENTOR 8.6mm MrffiM-z:

r ATTORNEY :onNNIs i2, DnIsoonL, or oov NA, CALIFORNIAL g SAFETY TUBING-ANCHOR.

To klllfwfiomitmay concern.

. Tubing;

wrought iron and steel pipe. '1

Be Ill; known that I, DENNIs L. DRIsooLL, a citizen. of the United States, residing at Covina, inrthe county of LosgA ngeles and State of Californiafhave invented certain new and useful Improvements in Safety nchors, of which the following is a specification. l i

My invention relatesdto the class of safety; anchors for. Well-tubing,

0 Most Wells, and particularly oil and water Wells, require lining or caslng to mainta n:

an open hole. 4 Generally oil and wateravells of any consequence are drilled, and in: such wellspthe diameter is comparatively jsmall Thelining, which becomes part of, the well, is usually a metallic tube of suitablediameter and length, similar to the familiar his is called .easlng, and a long length Qt'casing is called a string; The casing is usually perforated Where it passes throughlthe oil or water-bearing strata, so the fluid may pen colate into the casing. As ml and waterbearingstratalare; often very deep, the per} forated portion of the casing may be as earth.

much'as 4,000fieet below the surface of the It is. the general practice. with wells as above described, to placejwithin thecas ng a metallic conducting pipe, or tube, fouconproper for carry ng, the assembled parts of veying the fluid tothe top ofthe well. This conducting pipe, calledttubingl: oigfstring of tubing, 18 slmilar to'lthe casing, but,;-oi:

course, is smaller so that it anay -be placed within 1t.2 wheneveriitls necessary to pump the'fluid, from the Well, as is generally the case; a pump. of the plunger type is fitted to a the lower end of the tubingiand operated from the topbymeansioit astring of sucker rods'. Frequently, for various reasons,- it is necessary to remove the string of tubing from the Well.. This is accomplished'bylii't ing the string through means of ,suitable tackle and devices attached :to the itop lof the string. As the strings of tubing are very long, suitable lengths arezunscrewed as the tubing is lifted abovefithe top of the well. lVhile a section is being unscrewed, there'- maining portion of thepstring is suspended by suitable device attachodto thetubingpat the top. It will be seemfromtthe above that when the tubing is beingw'removed i'rom1a well, the string is suspended from the top and the lower end maybe quite a distance from the bottom of the well. ThlS illSO. .11s

Speeiflcatioii of Letters Patent. P t t Application ma liebruary 24, 1914.

Serial No. 820,485.]

ed N 0v. 24,191441 truenvhenthe tubing s raised to bring the pump above the bottom of the Well, as nay often be the case; N ow should any l accident occur to the various devlcesused, to suspend, or raise the tub ng, or,,as frequently happens, should the string of tubinglpart v,

at some joint below thetop oftheHvell, the

unsupported pdrtiomofthe tubing'will drop to the bottom of the well with results.

My inventit disastrous 1, is des gned partlcularly to overcome, thehdanger of: dropping tubing,

but the" principlesare also applicablehlto other hwtillj tools or device's. H 1

My invention consists mjthe IIQVGI v safety:-

anchor, which Ishall now fully describeby relference to, the accompanying drawings in wuchl we. o ill/Vi I igurel s a vertical sect on of my anchor showmgit m set poslt on forpassmg down;

through thevcasing, to the point ,whichlit is to be tripped. Fig. QlSl an elevation of the anchor showing it tripped. Rig. ]3 islafl seetion on line of, Fig. 2. Figs is;a seetionlon line .y -Ig "Of FigHQQV a 1 is the ivelL-casing, If a i I 2 is a section of tubing which in the purview of my invention forms, not only, part:

of the tubing-string,infto which it is let by suitable couplingslatteachaend, such as are.

indicatedat 2f,l,but also forlnsthe stock 1 my safety anchor.

3 is the body iforthe, slip-jaws :4. These aws, which in this art, are commonly termed $slips are, ingeneral, of the usual character, belngysl dably :fitted to upwardlydivergenttapered seats on the bodyf3 by ineanseof suitable connections, as, for example, by tongues on the back OfQth e sliPs and grooves (3 in the taper faces or seats ot the body. llhe outerfaces of, the slips are the casing, and as they move up, saidfaces contact with and are ready to grip the casmg. The bodyw3 is, insuitablemanner,

made fastand rigid on the tube section 2. The base, of each slip 4t is,formed. with an extension op cal- 8, which isprovided on its inner facewwith a groove 9, to receive a flange; 10, on the head of a sleeve 11, which is freoly mounted and adapted to ,turnupon.

thetube section 2. The flange 1O ofthe s'leevelhas.openingsl2 to enable it and the 1 grooved ears 8 of the slips to interengage and to disengage as the case may be. 1n the base of the slip-body 3 is mounted slidably a locking-pin 13, which is projected downwardly by a spring 14, and in the fiangelO of the sleeve ll'is made a hole 13 to receive said locking pin. The sleeve 11 may be a single continuous one, but for constructive reasons it is here shown as in two parts, united by a collar 15, the upper side of which forms a supporting shoulder for the lower end of a spring 16, the upper end of the spring carrying a freely slidable ring 1 7 embracing the sleeve. This ring co'acts with the'slips, either directly or, as here shown, through the intervention of pins or studs 18 depending from the ears of the slips and contacting with the ring. 1

19 are friction-members in the form of springs Which from their mounting may be termed floating in that their upper ends are secured to a headring 20 freely mounted on the sleeve 11, and their lower ends are secured to a foot clutch-member 21 also freely mounted on the sleeve: There may be any number of these springs and they may be composed of one or more leaves.

- They-'frictionally engage the casing 1, as

shownin Fig. 1. Between the bottom of the sleeve collar 15 and the top of the headring 20-is an anti-friction bearing 22 shown as of the ball-bearing type. The

- clutch member 21 .has'tongues 23which are adapted to engage grooves 21 in the upper face of a clutch collar 25 on the lower end of the sleeve 11. 1

The operation is as follows -The device is set, before it is placed in the well, by compressing the spring 16, pulling down the slips 1 and rotatingthe sleeve 11, so that its openings 12 are outof line with the.

ears 8 of the slips, thereby locking said slips in the position shown in Fig. 1. The device being new connectedwith the tubing by the couplings 2, is then lowered on the tubing into the well and the friction springs 19 press against the walls of the-casing 1 and prevent the foot ring clutch member 21 from turning. The rest of'the device, with the string of tubing, may however rotate freely in either direction, without danger of tripping the mechanism, and the whole may be lowered in the casing to any desired point. It will be seen by Fig. 1 that when the slips 1 are in the set position ready for tripping, they do not engage the walls of the casing because they are pulled down on their taper seats. It should also be noted that when the device is being lowered in the casing, that the friction springs 19 with attached rings 20 and 21 are forced or tend to be forced upward, due to the friction of the springs with the walls of the casing. Therefore, the clutch member 21 is held away from the clutch member 25 and there here is no engagement between the sleeve 11 and the springs 19.

WVhen the tubing has been lowered to the desired depth in the, well, the safety anchor is made ready for tripping as follows The tubing is raised a few'inches, or enough to bring the clutch member 25 up into contact with the clutch member 21, which is held in position by the friction spring 19 engaging the walls of the. casing, At the same time, the tubing is rotated slightly so as to engage the two clutch members by their tongues 23 and grooves 24, as shown in Fig. 2. 1n this position the anchor is ready to be tripped.

It will be seen that through the :clutch 21-25 and the contact of the friction springs 19 with the walls of the casing, the

sleeve 11 is now held from turning, and that a further rotation of thetubing will turn only the body -3 with its slips Ase as to bring the ears 8 of the slips in line with the openings 12 in the flange 10 of said sleeve 11. At this position the slips are released and areforced upward by the expansion of the coil spring 16. A slightly further r0- tation of the tubing brings the hole-13 in the flange 10 of sleeve 11 in line with lock pin 13, and said pin is forced into the hole by its spring 14 and lockssleeve 11. In this position the anchor is fully set for use and the coil spring 16 forces the slips 4: up-' ward on their taper seats in the body 3 until the teeth of the slips engage the walls I of the casing. The farther the slips move upward the more they are forced outward into engagement with the casing. Also, as the teeth 7 of the slips engage the walls of the casing, it will be seen that any downward movement ofthe tubing is prevented, as it tends to expand or move the slips'outward and make them grip the casing more firmly. Thetubing, however, may-be raised or even removed from the well, .as the upward motion releases the grip on the casing.

From the foregoing description, it will be seen that my safety anchor may be positively set before it is lowered into the well;

that it may be lifted in the casing without any danger of dropping through accident; that it may, whenever desired, be-positively tripped;-th:1t once it is tripped it islocked, so the tripping mechanism cannot interfere with the gripping action; that the tubing,

1,118,638 i a 3 a are external to the central tubing on which they are assembled, andthat it may be located above the lower end of the tubing string above the pump, soasto be above the perforated portion of the casing, obviating danger from causing sand to bridge between the tubing .Uld the casing.

I claim i 1 1.;A safety tubing anchor comprising a tubular stoclcwith meansfor securingit in the tubing-string; a taper-seatjslip-body fast on the stock; slips fitted to and slidable upon the taper-seats of a the body "a sleeve in which the stock is rotatably fitted belowthe slip-body; a spring and means operatedlby its expansion to force the slips upward; and

inter-engaging .instrumentalities betweenithe lower iends of therslips and the head olilthe sleeve, operated by the relative axial movement of, the stock a nd sleeve to hold the slips down and to trip them. a l 1- 2. A safety tubingpanchor comprisinga tubular stock withxmeans forse ou ring it in i the tubing-string; ataper-s'eat slip-bodyfast on the stock;slips fitted to and sl-idable upon the taperseatsof the body; a sleevein which the stock is rotatably fitted below the slip are tripped? body; a spring land means bperated by its expansion to force the slips upward; interengaging instrumentalities betweenthe lower ends of the slipsand the head ofthesleeve, operated bythe relative axiatmovement of the stock and sleeveto hold the slips down andtotrip them, and a spring bolt in the base of the' slip-body adapted to engage a socket "in-the head of the sleeve to lock the parts against relative motion after the slips -30A safety tubing anchor comprisingfia tubular stock with means for securing it in the tubing-string; a taper-seatslip-body fast on-thestoclr; slips fitted to and slidable upon, the taper-seatsofthe body; asleevein which W2 the stock is rotatably fittedbelow the slipbody; a springand means operated by its expansion to force the slips upward; and interengaging instrumentalitics between the lower-ends ofthegslips and the head of the sleeve, operated byth'e relative axial movement ofthe stock and sleeve to hold the slips down and to tripu them, consisting of ears,

extending from the slips and having grooves 1n their innerfaees, and afflange on the head of the sleeve adapted toseat in thegroo-ves the passage of said ears.

offthe ears, andprovided with openings for 4:, safety tubing anchorcomprising a tubular stock wlth means for securing it in the tubingstring; a taper-seat slipbody fast on the stock; slips fittedjto and 'slidable upon the taper-seats (if-the body; a sleeve in which 4 the stock is rotatably fitted below the slipbody; a spring and meansoperatedby; its

expansion to force the slips upwardriiiter engaging instrumentahtles between the lower 1 ends of the slips and the head of the sleeve,

operated by the relative axial movement of tie stock and sleeve to hold the slips down and to trip them, consisting of ears extend- :ing from the slipsand having grooves in their inner faees and gawflange on the head of the sleeve adapted t o seat in the grooves gage a socketrin the; lheadof the sleeve to lock the parts againstzi relative motionafter the slips are tripped. 1 I

5. A safety tubing fanehor} comprising a tubular stock with meansforseem'ingit in the tubing stringratapeu-seat slip-body fast on the stock; slips fitted to and slidable upon the taper-seats of the body; a sleeve in which the stoclciis rotatably fitted below the slipbody a spring and ,means operated by its expansion to force the slips upwardyinterengaging instrnmentali ties between the lower ends of the slips and thehead of the sleeve, operated by the relative axial "movement of the stock and sleeve to hold theslips down and to trip them, and meansfor holding the sleeve against rotation while the stock is turning on its axis to trip the slips.

(3. A safety tubing anchor COII'IPIlSlJIg a tubular-stock with means for securing-i6 in the tubing-string a taper-seat slip'body fast on the stock; slips fitted to andslidable upon the taper-seats of the body; a sleeve in which the steckflis rotatably fitted belowthe slip-bodyg a spring and means operated by 0 itsexpansion to force the slips upward inter-engaging, instrumentalities between the lower endsyof the slips and the head of the sleeve, operated by the relative axial move ment of the stock and sleeve to l lQld the slips downand totripthem, and means rotund ing the sleeve against rotation while the stock is turning on its axis to trip the slips, consisting of spring members carried by the sleeve and frictionallyengaging the walls of the well casings a A: safety tubing anchor eon'iprising a operated by the relative axial movement of the stock and sleeve to hold the slips down, and to trip-them, and means for hol'dingthe sleeve against rotationwhilethe stock turning on'its axis totrip the slips, consisting of spring members carried by the sleeve and frictionally engagiiig the walls ofthe well easing, said members being mounted rotatably upon the sleeve, and a clutch between 13o &

the spring members and the sleeve operated by turning the stock and sleeve on their axes. I v

8. A safety tubing anchor comprising a tubular stock with means for securing it to the tubing-string; a taper-seat slip-body fast on the stock; slips fitted to and slidable upon the taper-seats of the body; a'sleeve in which the stock is rotatably fitted below the slip body; a collar on said sleeve; a spring seated at its lower end on the collar, and having its upper end arranged to force the slips upward; interengaging instrumentalities between1the lower ends of the slips and the head of the sleeve, operated by the relative axial. movement of the stock and sleeve, to hold the slips down and to trip them; spring-members adapted for frictional contact with the well-casing, said springs being carriedybya head ring and a foot ring bothrotatably fitted on the sleeve, and the foot ring forming one ;member of a clutch; a clutch member on the foot of the sleeve coacting with the clutch member of the foot ring of the spring members; and an antifriction bearingbetween the sleeve collar and the head ring of said springs.

9. A safety tubing anchor comprising a tubular stock with means for securing it to the tubing-string; a taper-seat slip-body fast onthe-stock; slips fitted to and slidable upon the --taper-seats of the body; a sleeve in which the stock is rotatably fitted below the slipbody ;a collar {on said sleeve; a spring seated at its lower end on the collar, and having its upper end arranged to force the slips upward; interengaging instrumentalities between the lower'endsof the slips-and the head of the sleeve, operated by the relative axial movement of the stock and sleeve, to hold the slips down and to trip them; springmembers adapted for frictional contact with the well-casing, said springs beingcarried by a head ring and a foot ringboth rotatably fitted on the sleeve, and the foot ring forming one member of a clutch; a clutch member on the foot of the sleeve coacting with the clutch member of the foot ring of the spring members; an antifriction bearing between the sleeve collar and the head ring of said springs, and a spring bolt in the base of the slip-body adapted to engage the head of the sleeve to lock the parts together when the slips are tripped.

10. A safety tubing anchor comprising a tubular stock with means for'securing it to the tubing-string; a taper-seat slip-body fast on the stock; slips fittedto and slidable upon the taper-seats of the body; a sleeve in which the stock is rotatably fitted below the slipbody; a collar on said sleeve; a spring seated Copies of this patent may be obtained for at its lower end on the collar, and having its upper end arranged to force the slips upward; interengaging instrumentalities be' tween the lower ends of the slips and the head of the sleeve, operated by the relative axial movement of the stock and sleeve to hold the slips down and to trip them, consisting of ears extending from the slips and having grooves in their inner faces, and a flange on the head of the sleeve adapted to seat in the grooves of the ears, and provided with openings for the passage of said ears; spring-members adapted for frictional contact with the well-casing, said springs being carried by a head ring and a foot ring both i rotatablyfitted on the sleeve, and the foot ring forming. one member of a clutch; a

clutch member on the foot of thevsleeve coacting with the clutch ineinber of the foot ring of the. spring members; and an antifriction bearing between. the sleeve collar and the head ring of said springs. v

11. A safety tubing anchor comprising a tubular stock with means for securing it to the tubing-string; a taper-seat slip-body fast on the stock; slips fittedxto and slidable upon the taper seats of the body; a sleeve inwhich the stock is rotatably fitted below the slipbody; a collar on. said sleeve;fa spring seated at its lower end on the collar,'and having its upper end arranged toforce the slips upward; interengaging'v instruinentalities be tween the lower ends of the slips and the head of the sleeve, operatedby the relative axial movement of the stock and sleeve,'t0 hold the slips down and to trip them, consisting of ears extending from the slips and having grooves in their inner faces, and a flange on the head of the sleeve adapted to seat in the grooves of the ears, and provided with openingsfor the passage of said ears; spring-members adapted for frictional contact with the well-casing, said springsbeing carried by a head ring and a foot ring both rotatably fitted on the sleeve, and the foot ring forming one member of a clutch; a clutch member on the foot of the sleeve coa'cting with the clutch member ofthe foot ring of the springmembers; an antifriction bearing between the sleeve collar and five cents each. by addressing the Commissioner ofvPatent s Washington, 12. .0.

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