US2144156A - Rotary table bushing - Google Patents

Description

Jan. 17, 1939. G. D. .loHNsoNrv 2,144,156

ROTARY TABLE BUSHING Filed Deo. 1o, 1937 @ff f5 N 4f 2 3 40 w 32 f 23 Jj 532m 3o y 35 f6' gg f6 ze T f fl-n 10 36 2 /5/ l 4" /VMJ 30 Vm 33 30 3/ 32s 23 35 /3 5&3 Afm/y I Patched Jan- 17, 193,9;

l I noTaaY'TAnLEnUsmNG' "1 GlennD; Johnson, ompton, Calif., 4ausignorto Boss' Tool Company, Los Angeles, Cami, acorporationof` Californiay e f 1 e lf Anplicauoufneeinber 1o, 1931, serielle. 1792131( lV -111` cm Si waas-23- I l This inventionrelategto wendmg 11i-p mentand ,relates more `particularly to aKel1y..-

I bushing or drive bushing for the rotary table of` a I well drilling rlg.1 A; general object of thistlnven-lwf I 51 tion is to provide an improved;` Simplied andV i readily serviced Idrivebushing, of the roller type.

transmit rotation thereto. II i In mounting the rollers it has been the usual practice to fix therollers.. on .pins and rotatably support. the IplnsI in.. open-1` `ings in the cages. I`Aiter-atperiod of use the pins l 5 wear the openings out ofIIrounjd Iandinorder to .3 reconditlon the bushing for further use it isneces I sary'to discard the cages ,as WellgasIItlre.,worn,I`

rollers andfpins` and install new; orrepl'acement cageshaving newplnsandrollers. I

" 20I` Another. object `of `this invention provideV a Idrivebushing of the character mentioned in which the` cages receive llttleorI no Wear and therefore Ido not require replacement. l I

I AnotherobjectA of thisinvention is Itoprovide aI r `zfdrivebushing' of, the roller typevin which theI rollers are rotatableon supporting pins andthe pinsare neldagalnst axialmovementand rota-` I tionso they do not ywear the cages,

for` lubricating the rollers Aand their supporting pins. f

*accompanyingdrawing,'in'which: 2 I f Fig.` 1` is a side elevationof the im gageirrent with aIclrill'steniand seated in a'rotary tablegthe' rotary tablebeing shown inI` vertical w dicated by. nner-4 on` F1g.'3 illustrating the l measure-f i `ing providedbythis inventionIshowing'itIin enI`` cross section."` Fig. 2 is an enlarged vertica l.de e 45 "tailed sectional view of thebushing removed irornII tended for on .therotary table ofI-arotary well drilling. rigI toItransrnit rotation Ito the` polygonal Kelly or drill `steniofI the drilling string. In` the drawingl have illustrated a typical pre- I 5 A .I `ferrecl forrnIIof, theinvention and inFlg; 1 I have A`` type of.- drive bushing Inowl in extenslve use` q includes a shelllorI body,rau`plurality of cages re- `jIrnovably arrangedin thebody and rollers'm` theI mi cagesfor contacting tneIpOIIYUOnaldrill stem to shown the ,bushing arranged in arotary table T 1toIcoo`perate with a tubular externally polygonal r l driilstem S., `Theportion of the typical rotary tablelnustatedm Fig. `1 is provldedyitn a cenm verticalopeningI I2. -The upper portion I2lof the opening` I2 is polygonal while the majorV portion I i ofttlie opening IZi's round in cross sectlonand l5 tapered. It lato be understood thatthe rotary table ITIis adapted to be driven or 4rotated in the usual;V manner.I and that the drilling string and the drillingl tools are adaptedv toIbe passed through the opening I2 in the master bushing |I. 20 l The Kelly or drill stemISshown in the drawing is of conventional or typical oonstructionand isI an elongate meinberlof substantiallyesquare horizontal cross`section.` I

venti'on includes, generally, a body Iladaptedto 'l beseated inthe opening I2 ofI Ithe master bush-1 l I 3 r ing Il, Ia. plurality ofI Icages'rliin thebody Il, I Another object of this invention is to providea I `30 driveIbushingof the characterereferredyto emrv bodyingI simple, Ieilectlve and 'inexpensive Iineens y supporting the rollers I6 on Ithe cages I5. r 30 I I` "e bushing body Il is provided toIcarry or" containthe cages I5Iand is intended to bearrangedfin theopening I2 of thebushing II to I rotate withtlie rotary table'l?. The body Il isla plurallti'eslof rollers `I6 and means I1 for rotatably I v Htubularl sftructureelor member having a 4central 354 l longitudinal I opening I8. The .lower portion of I the'bodyIIIl 'is roundIIinIhorizontal cross section l. I and'is tapered to iitor seatyin thetaperedmajor portlonoffthe master bushing opening l2. The

main or upper'portion of the'body Itis substan- 40 tially square lnI horizontal cross section to llt l u I tneupper portion Ivonne opening? l2.4 J The l openingffl inthe bodylltpassesIorIreceivesItlre i I `drill "stexnIS'Iwith substantialmclearance"and is I preferably *s ubstanuauy square m horizontal .45

e r cross Iseotlori to receive ther-,ages I5. A trans-I l tailed seotionalview taken as indicatedv by 'line r r r 3--3 onFlg. 42f, Fig.I4 is Iafragmentary verticall'II .wallfof theopening I8 adjacentthe lowerlendIof detailed sectionalfyiew taken substantially asin; Il

verse or horlzontalilange l9f,proje`cts from the theoperiing. I'I 'he"flange`` I9 Iserves to support f the cageslsin the body Mas 'wiilf'e subsequent- .501 y ly' described.. The extreme upper end portion Ill I ThecagesII I5 are removablyarrangedtin the body It to bam the muere Is. where the man ,5

The Idrive bushing providedvby the presentin- 5` 45 orfeedingof thedrill stem. rThere rsides 23. The lower ends 2| of the cages I5 rest on the flange i3 to support the cages in the body |4 and the outer surfaces of the cages are adapted to bear outwardly against the :vertical walls of the square body opening I3. The opposing inner` surfaces 22 of the sides 2Ii are preferably fiat and vertical. The opening I3 of the body I4 is provided with diagonal 'comer walls `23 cooperating with the outer corners. of the cages I to mist in retaining the cages in `proper position in the body. The inner corner portions of the cages Il cooperate or mesh to assist in holding iengaging rollers Ilare tubular, being provided l'ni t l: to have' their opposite the cages in proper position as will be more fully described. 'I'he cages i5 arranged against the four side walls of the opening |3 denne a vertical .openingv of square horizontal'cross section adapted to possv the drill stem S withclearance.

VMeans is provided onthe body 4 to removably retain or hold the cages Il against'vertical move# ment or Vdisplacement.` This means includes a retaining ring 24 threaded on thecylindricai upper portion; |4- of the body |4. The ring 24 is providedwith an annular inwardly projecting flange 2B that partially overhangs the upper end .of the body opening I3. The flange 25 is adapted' to cooperate with the upper surfaces of the cages I3 tb hold the cages down against' the flange i3. The retaining ring 24 is preferably locked in a position wherelt holds the cages against vertical movement.v Ears 26- project from the exterior of body |4 and similar ears 21 are provided on the ring 24." Bolts 2l are arranged thrown openingsvin theears 26 and 21 to deflnitely prevent rotation and loening of the ring The rollers Il are rotatably'mounted on the cages Il by the means|1"and are'provided to cooperate with the drill stem S to transmit turn` ing forces thereto and to permit vertical shifting n n is preferably a plurality of rollersj` i3 foreach kcage I5 and the several rollers I3 are preferably identical. rollers I3 are cylindricalmembers and are preferahly hardened to belong wearing. The stem with central `longitudinal openings 23. VThe oppostte ends of the rollers I6 are preferably nat and normsi tothe `longitudinal axes of the rollers.

The means |1 serve to rotatably support the rollers Il .in the cages i3 for rotation about substantially horizontal axes." The "ineans I'1 are important features of the invention as they serve to `support the rollers I3V in such a manner that" they do notwe'ar the cagesii. `The means I1 completely' through the sides 23 'of the cages and are of equal diameter. means |1 further include pins 3| seated or arranged in the openings 3l `and passingv through rollers Il to rotatably support the rollers. rollers i3 are positioned betweenthe spaced sides of the cages, Il and end portions supported in the openings 3l and to extend'through the openings Y"of the rollers to support the .rollers for rotation about substantially horizontal axes. The pairs of aligned pinclrrying openings of the The.

theopenings n in the T'he thepins 39 are arranged` several cages may be in the same horizontal planes so that the rollers I3 are in'corresponding positions on the cages. The parts are related and proportioned so that the rollers I6 rotatably supported on the pins 3| as just described, project inwardly beyond the inner surfaces of the cages |5 to contact the flat side surfaces of the polygonal drill stem S. The pins 3| are preferably solid members of uniform diameter.

The means I1 further includes a novel and very effective arrangement of parts for holding the pins 3| against rotation and axial movement 'so that the pins do not wear the openings 30 in thel cages-I5. One ende32 of each pin 3| is flat and flush with the `other side surface of one side 2I|,of its respective cage l5. The said fiat ends 32 of the pins 30 are flush with corresponding outer 'side faces of the cage sides 23. One side 20 of each cage I5 has a vertically extending recess or notch 33 in its inner corner portions. The notches 33 have fiat vertical walls and are shaped and proportioned to receive the inner comer portions of adjacentrcages I5. AThe notches 33 partially intersect or join the pin receiving openings 30. Each pin 3| is provided with a flat walled notch 34- in the end portion opposite to the plain flat end 32.- The walls of the notches 34 are adapted to lie flush with the walls of the notches 33 in thel cage sides 20.-- The parts are related and proportioned so that the plain ends 32 of the pins 3| are flush with the adjacent outer side surfaces of the sides 2I| when the walls of the notches 34 are flush with the walls of the notches 33 in the opposite cage sides 23. The plain or unnotched inner comer' portions of the cages I 5 cooperate with the notches 33 of adjacent cages I5 to interlock the cages in the proper positions and cooperate with the notches 34 in the pins 3| in said adjacent cages l5 to positively prevent;

rotation of the pins'and endwise movement'of the pins in one direction. 'I'he plain ends 32 of the, pins 3| cooperate with or engage the axial walls of the notches 34 in the pins 3| carried by adjacent' cages i5 to asist in preventing rotation of the last namedl pins and to prevent axial movement ofy the first named pins in the other direc tion. Thus it will be seen that ythe transverse walls of the notches 34 vcooperate'with the inner surfaces of the sides ofthe adjacent cages I5 to prevent axial movement of the pins 3| `in one direction while the plain ends 32 of the pins cooperate with the axial walls of the notches 34 in the pins carried by adjacent cages I5 to prevent axial movement of the pins in the other direction and the inner corner portions of adjacent cages I5 have side surfaces cooperating with the axial walls of the notches 34 in the pins to positively prevent rotation of the pins. The meshing parts of the cages Il and the pins 3| serve to positively hold the pins against movement so vthatvthey canot wear the openings 33.

Means are providedt lubricate the pins"3|l and thev rollers I6. Each pin 3| is provided'with an axial lubricant duct 35 and lateral ducts38 communicate with the duct 35 and discharge into a vroller opening 23.y 'I'he longitudinal ducts 35 may extend inwardly from theplain ends 32 of the pins 3l Vand their outer parts may be closed by plugs 31. Vertical or transverse ports 33 arey provided in the pins 3| to communicate with the* axial ducts 33. A substantially vertical lu bricant port 33 extends downwardly through one side 23 of each age i5 to register with the ports 33`in the several pins 3| carried by the cage. Grease gun nttings 4I are provided in g5 i the upper ends of the ports 39 to facilitate the @delivery of lubricant to the ,'I'hetglttingsv III vmay be `contained `in jsocketsi in the,upperl Surfaces ofthe cage; sides'. 2|). `.,The,".n0tclies' 341 in thefpinsfl cooperatingrwith the corner ,Dlf tions offthefadjacentcages 4I5, maintain fthe pins in vthe rotative positions where their ports v *38`ja`re in registrationwith vthe main lubricant "thepinsandtherollers. V During `the, operation of thedrilling` apparatus the rotary table` '1" `rotated in, the `usl'ia'i mannen` fthe rollers"\|,6 contact the sides oi' the polygonal stem S `to transmitthe `turning forces thereto.

` f ports 39"..V It miipeapparent new lubricant under pressure introduced through the fittingsjli passes i to the,openingshlain,therolleijs Iftolubricate andf as the drive btishing` rotatesy AWltlrthey table The rollersVIG are supported-for'freerotation on their pins 3| rso thatfthedrill stem S maybe fed t downwardly or moved. longitudinally with a miniof friction while being rotated. The rollers `|6 supported onthepins 3|"as describedvabove f rotate about horizontal axes `and are',4 of" suiii# 3, cient` length to have Aextensiveengagement with `the atsides Voithepolygonalstem S. 'Ihe sur- `faces 22 are engageable bythe rollers I6 to pre-jl vent endwise movement of the rollers. The pins f 1 3| are positively heldvagainst turning, by the end openings 30 in the cages, the cages are subjected .to little" or no wear `and last indeilnitely.

When the rollers I6 or the pins `3| or both becomeworn the ring 2l may be removed from `portions of the adjacent cages I5 and the 'pins 3| cooperating with the notches, andthe pins l'v are definitely held against endwis'e movement by such cooperation.

rollers I6 through their engagement with the drill stem S cannot produce movement -of the. pins 3| and the pins do not wear in the openings 30. As, the cages I5 are not engaged by the ,i drill Accordingly, rotation of the stem S and as the pins 3| do not wear the the body; I4 and-'the cages I5 may be removed further use.

from4 the body for the purpose ofreplacing the pins and rollers.` When the cages i5 are removed from the body Il the worn pins 3| may bereadily driven or slid from their openings 29 and 30. The newVor replacement pins 3| and rollers I6 may be easily and quickly mounted in the cages I5 and the cages provided with the replacement parts may be re-inserted in the body I4 for The bushing of the present invention is such that it may be fully reconditioned for use by merely replacing the simple inexpensive t rollers I6 and pins 3|.

Having described only a typical preferred form and application Vof my invention, I do notI wish to be limited or restricted to the specific details herein set forth, but wish to reserve to myself l any variations or modications that may appear to those skilled in the Vart or fall withinthe scope of the following claims: Y

Having described my invention, I claim: 1. A drive bushing of thecharacter described including a body, cages in the body having openings, pins carried in the openings, rollers rotatable on the pins, and surfaces on one cage holding the pins of another cage against rotation.

2. A drive bushing of the character described including a body, cages in the body having openings, pins carried in the openings, rollers rotatable on `the pins, and cooperating surfaces on the pins of a given cage and on theadjacent cages preventing rotation of the pins.v

3. A bushing for driving a drill stem of `a drilling string comprising a body,`cages in the body l 6. A bushing for driving a drill stem having openings, pins in the openings having flat axially extending faces, rollers "rotatable on the pinsfior'engalging'` with `the drill stein,` and means formholding the'` pins `'against rotation including a cage part cooperating witiijfsaid-` facebof a pin t 5 on. another cage.4 A 3 f4; A bushingnfor driviiigafdrill stem `^oi a drilling` string comprisinga"body,cages in the body` having` openings,` pins in the `openings having notches, rollers rotatable on the 'pins` and adapted 10- to `engage the drill stem, `and means for holding the pinsj againstkirotation including surfacesbi a cage"extendingyintothevsaid notch in the pin on another cage.`

5, A bushing'fqurivirig a riii stem cramm- 15 irig string comprising .a jbody,`V` cages lin the i `having openings, each-cage having al notchj in a comer Jmmg its* opening, the" cjges `being as; sembled with a corner portion of; one cage fitting the `said notch 4in an Vadiacent page, pins ar- 20'` ranged in said openings lhaving notches registering with the first named notches to `cooperate with the said corner portions, androliers rotatable on the pins.

ing string comprising a body, cages in the body having openings, each cage having `a notch in `one corner, the cages being assembled about the `drillstern with a cornerportionof one cage received inthe notch of an adjacent cage, a pin 30 )arranged in each opening andhaving anotch l engagedby a fsaid corner portion" of a cage to be l held against rotation thereby,randfrollersl rotata- `ble on the pin to cooperate with the" drill stem 7. A bushing fordriving adrill stemof a drill` 3U ingstring comprisingfa body,cages in the body of a drill- 25 having openings, each cage having 'a -notch in one corner, the cages being assembled about the drill stem with a corner portion Vof one cage received in the notch or an adjacent ca'ge, a pin arranged in each opening and having one endengaged by a said corner portion of a cage to beheld against rotation and axial movement inl one direction and having its other endV engaged by apin on another cage to be held against axial movement ;in` the other direction, `and rollers rotatable on the pins and adapted to cooperate with the drill stem.`

8. A` driveb'ushing forfrota'tmg a drin stem comprising, abody havinganopenin'g, a pluralr ity of supporting` members arranged in the opening to define a polygonal opening for receiving the f stem, each member having a` vertical notch in one corner receiving ythe corner portion; of an adjacent member, the membershaving spaced openings ings and having notches registering with the rst mentioned notchesto be held against rotation by` the corner portions of 1 the members received therein, and rollers rotatable onthe pins toco operate with the stem.` l i 9. A drive bushing for rotating a drillstem comprising, a body having an opening, a plurality o! supporting members arranged in the opening i to denne a` polygonal opening for receiving the stem, each member!Y having a'vertical notch in one corner receiving the corner portion of an` adjacent member, the members having spaced openings joining said notches, 1311.15 arranged in the rst mentioned notches to be'held against rotation and axial movement in one direction by the corner portions of the members received 1 therein, the pin'sof adjacent members cooperat- `joining `said notches, pins arrangedin the openthe openings and having notches registering with )m lng to prevent axial movement of the pins in the n other .rnd rollers rotntdble'ion the pins.

n lll.y A bushin iordriving l drill `stern ofa drillingltrin'z comprising s cues in the body havin! openixl. elcheue hnvinl'a notchin s corner iolning itsppenins. the cues bein: s-'- sembledwiths `zomer `portion ot one me fitting the cues :lubricant plunges, n.ndithe pinsl mmm lubneent incumbencia 'with the -m;.

n 11; A drivelmnlxinl` torrentim vs'dx'illi stem i bOdlhlvlni-in Openins.' "vlumlitz of] mordu: umher. Unused in the opening toddine ...Polytonpl tot receiving the manu stem, elch member havingl a rticni notch in one corner receiving the corner portion ot an eddscent vmember the members having spaced openings 'Joining said notches, pins nrranged in the openins and having notches relisterinz with the lfirst mentioned notches to be held against rotationv nnjd' axial movement in one direction by the corner portions of the members received therein, the pins' o1 ndincent members cooperating to 'prevent axial `movement of the pins in the other direction. and rollers rotatable' on the pins, themembers having' lubricant passages in tersectinazV said openings, und the pins having lulzvricnntA ducts withthe said passages.

GLENN n. JOHNSON.

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