US1611282A - Expanding and contracting rotary reamer - Google Patents

Description

- Dec.. 2l 1926.

c. R. sAMUELsoN EXPANDING `AND CONTRACTING ROTARY REAMER Filled June 2, 1925 2 sheets-smet 1 Mmmm@ ..HMUMIJM fqfornley Dec. 21 1926.

` Ac. R. svAMuELsoN EXPANDINGAND .CONTRACTING ROTARY REAMER 2 Sheets-Share?.

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Fil'erd June 2, 1925 ,V/fern y Patented l, Dec. `),21, 1926.J

I UNITED STA canna. sAMnLsoN, yon PRTLAND, onneon.

v Tiss PATENT o 41,611,282 FFics. l,

EXPANDING Nn CONTRACTING .ROTARY BEAMER apicauon mea .Tune 2,

,My device isligenerally used `:ln con ju11cdy tion with welldrilling where a casing 1s -inserted and progressed in the well whichis that will work by automatic means after the in and through the sameV it is absolutely nec-- being' made, Since the drilling .operation is carried on beyond the casing and from w1thessary that expanding'means be provided bit has'passed below the lowest 'point of the .casing which may be several hundred or thousand feet belo.w 'the surface of the ground. Under such conditions, means must be' supplied that will not easily get out -of order. My invention is intended for use in drilling operations wherein drills of the rotary type are preferably used and is especially adapted for use where a casingor wellv cribbing is'being placed as the hole is reamed or enlarged. g 'A further object of vmy invention cons1sts in an expanding and contracting' rotary reamer cutter, the cutting jawsof which eX- 1 pandirig the same-, and when so expanded, to

ings which accompany and form apart of Fig. a partial a'ssembly. view.

maintain thesame in an absolutely rigid condition. It is not possible to\collapse the sampJ until the sloping surfaces contacting with the inner surfaces of the cutterq'aws have been released from contact therewith. With these and incidental obiects'in view., the invention consists in certain novel fea- ,tures `of construction and combination of '.parts, the essential elements of which are set .forth in `the appendedclaimsfand to a preferredform of embodiment of whichis hereinafter shown'with reference to the draws the specification.

In the drawings: 1 v g Fig. Lis a side elevation,' showing the application of my invention as used' in the drilling and reaming operation.. a Fig. 2. is atransverse sectionalview of'my device, illustrating thereaming and cutting jaws in inoperative position. Fig. 3 is a. transverse, sectional view. illus-.- trating the reamingand, cutting aws vili op# erative position. V

Serial'Nlo. 34,322. f

l) V l Fig. 5 lis a cross section view taken on h ne 5 5 ofFig; 2, looking in the directlon 1ndicated. I

Fig. 6 1s an enlarged'cross sectlon view,

taken on line 6-6 of Fig. 2, looking in the direction indicated.

Fig.

the method of assembly used in assembling the device. 51

Fig. 8 is an inside shells..

7 isa side elevation, illustrating a lpart of the units and isy made to villustrate view of one of theisplit".

Like reference characters refer to like parts throughout the several views.

My invention consists broadly of upper and lower head members'l and 2, adapted .to a screw connection on the outer ends of the same tol thedrilling stem', which has been omitted from the drawings for the purpose of clearness. The outer ends of the head members are, adapted to threadirg engage-" I ment Iwith split shell members 3. and .4,

which are held in intimate engagement along their medial lines `by the threadingof the two head members thereupon, but as an add- -ed safety and'to strengthen the same the shell members are held together by -two ring bands 5 and 6. The' split shell sides form the frame inl which the cutting jaws split al@ supported and the housingv into which the full floating' automatic .actuating mechanism is placed for the distendin'g ofthe cutting jaws by hydraulicv means under pressure.

In drilling operations it is the general practice to use' casing as the drilling stem through which the pumped under pressure the same. being discharged at, or near the head, or point of the drillingbit and the return of the pumped operating liquid is liquid carries the drilledv particles under suspension within the pumped liquid to the surface from where the-drilling operations are carried o n. My. device is connected to.

the drilling stem on its uppert end by the` threaded screw, joint 7, and to the split shell members by the threaded engage.-

ment. as shown at 9..the head member .is l hollow as shown at 8. and adapted -to ythe -passage of the liquid being 'pumped'there-.s

through bythe same passing throughfthe .fhollow'oating pistoned stem 10, having 'a longitudinal passage therethrough as shown' at 11. The gland'nut 12, is adapted. to the upper ends of the split shells by threaded l engagement. 14, and the gland nut 1*2, 'isso arranged that suitable packing material 15,

- may be compressed about the `pistoned stemv 10, to form a tight hydraulic packed gland between the 'upper end of the split shell members and the pistoned stem.

head member is recessedout as shown at 13, for the reception of the 'head of the gland nut 12 therein. The lower headmember 2, is adapted to the split shell members by threading engagement as shown .at 16 and' hydraulic pressures' are being used in theoperating system.A The piston and l'stem'are -normally held at the bottom of the 'stroke' through the action of the coilv compression u spring 19, actingagainst the upper end of the piston and reacting against the lower ends ot' the split shell members 3 and 4. A cone shaped slidable head22, is adapted to the outerpist-oned stem and in slidable relation therewith, .the-same is smaller in diameter below the.head and has a recess 23, formed about the restricted diameter disposed below 'the` head and a split sleeve 24, "made in two sections, having rings24a and 25, formed within the same adapted to fit within the recess 23, on its Aone end and' into a groove within the pistoned stem on the other, the object of the same being to form a flexible connection between ythe cone 40 shaped slidable head yand the pistoned stem. A compression coil spring 27, rests upon the shoulder 28, of the cone shaped slidable head on its one end and upon the upper surface of' the Sleeve on the other end and there being a space 30, between the lower end of the cone shaped slidable heads-22, and the upper end of the split sleeve 24, to'form a sliding engagement between the cone shaped slidable head and the-pistoned stem.` The purpose of this spring. and-sliding connection 'between the cone shaped head and the pistoned stem is to provide a flexible shock absorbing connection therebetween, which would lessen thel danger of the drillingf jaws becoming 5 jammed or injuredwhen they are being eX- tended to 4an operating position. The. central passage 11, through the pistoned stem terminates at its lower end in ports 31 and 32, adapted to discharge thefliquids under high pressures at the lower end of the piston head20, and the pressure within the cylinder Will cause the `piston and pistoned stem to rise to an operative position, and since the cone shaped slidable head is indirectly con- 5 nected tothe pistoned stem, the same will be vstem terminati-ng in a horizontal opening 34, The upper `pistoned stein in the extreme low position,

out and thus permitting a release of the drilling jaws which are hinged thereabout.

raised within certain limits as the piston head is raised. A central bleeder port 33 is formed near the lower end ot the pistoned the object ot1 which is to form an equali'z'ingy bleeder port for the drainage ot' thedrill stem and to equalize the pressures that will y result as the drilling stem Vis partially or wholly removed from the well being drilled. A A band 35 disposed about the lower end'otl tfhe pistoned stem is adapted to close the out-A let ports leading therefrom excepting that as the-pistonedstem is raised the ports 36,v disposed within the lower end ofthe pistoned stem'are raised'clear ot the band 35, and the pumped liquid flows through the cleared ports and is discharged' within the vlower drilling stem not here shown and to which the drilling bit or head is attached. Thisposition is bestshown in Fig. 3. The drilling jaws, as four in number, are shown in Fig. to be in the inoperative position with the cone shapedslidable head and the but the same are shown in Fig. 3, to bein raised-position wherein the sloping surface 37, of the cone shaped slidable head has .contacted with the lower ends ofthe inner surfaces ot lthe drilling jaws 38, and distended the lower ends of the same.1 These drilling jaws are preferably made of rectangular lstock, that may be shaped at the location of the work and may be made by a smith or. other skilled'worker without the necessity of highly skilled mechanics or experts for this class of work. :"When the pumping pressure is cut off the pistoned stem will be 'returned to the low position .as shownl in Fig. 2, through the action of the compression spring 19 and the cone shaped sliding' 105 head will be lowered and out of intimate contact with the drilling jaws, which will -be returned to the normally inactive position. `Whe`n `the drilling stem is raised to the extent that the drilling jaws contact with the well casing andas the drill-ing steml is raised the inner wall surfaces of the casing will return the drilling jaws to the normal position of being closed, or drawn uinto the split side walls of the .support for the same. U5 The drilling jaws 38, are hinged about the pins 39, and the pins are maintained within drilled holes 40 placed within the wall struc- 'ture ot the split shell members. These pins are so arranged in, position that vthe -sa-'me 120 f tend to lock each other in place when the Y completed unit has been assembled thus precluding anypossibility ot the same falling' The arrangement of these pins is best shown in 'Fig'. 6. wherein the pins 39 are plain cylindrical members inserted in position and thereafter the V pins 39a are placed \in position and the projecting neck 39b crosses the unclosed openingthrough which the pin 39 was entered thus locking the same in position.. Small openings 40a connect vwith the' larger opening into which the pins 39 are 5.asecured, thus permitting the insertion of a certain limlts.

dislodging pin therein to dislodge .the pinfor remoy'al to ermit of theremoval 'of the drllhng -jawslorrenewal or replacement. 1 The drllhng jaws may be distcnded-n'ithin by the Acontacting of the wing section 4l of the drilling jaws having a sloping surface- 42'adapted to senat upon the-sloping surface 43, of thefwall structure. The limits' of dis` 1,5 tcntion are determinedl by the location' of f zo these contacting sloping surfaces land `the diameter of the conical sliding head, either of which may be Varied to meet the operat ing conditio A l p The ring bands which. are preferably placed inposition about the split shell members by a pressed t `may be further locked rin position by the applicationof set screws 44 and 45, where one half of the `set screw 25. engages the body portion of the split shell member, and the other half engages with one or both ends 'of lthe-ring band. The set screws may-be threaded int-o ethe splitshell members to a depth greater than that ofthe i thickness ofthe 1ing band.

While theform of mechanism herein shown and described is adapted to fulfill the objects primarily stated, it is to befunder- -stood that it is'not-intendedA to confine `the ".35 invention to the :one form olf-embodiment herein shown and described, as it is 'susceptible ofiembodlment 1n Varlous forms,l all coming within the scope of the claimsY which -v per and lower head members adapted to'.

. -placed about said'pistoned stem and adapt-- ed to return said stem to its normal posi-t followsv What I claimisk lf. An expanding and contracting lrotary.

reamer', comprising split shell members, up-

threaded engagement with the split shell members, ring bands disposed about the split shell members and. in pressed relation there` with,a hollow pistoned stem running lengthwise of the assembled heads and splitv shell members and adapted to movement in one direction by a liquid under pressure, aspring tion when the liquid pressure is released, a slidable' head disposed about the pistoned stem and adaptedl -to distenddrillingjaws maintained in hinged relationshipwithin the split shell memberswhenvthe pistoned `stem is actuatedby a'liquid pressure.. .2. An expanding-and'contracting rotary reamer, ompri'sing a 'body portion formed of split s i ell members and upper and lower head members, said body portion adapted to threaded enga/gement with a drillingA stem of. the rotary'type, a hollow pistoned stem disposed within the body portion having The limits are determined- .portl outlets leading. therefrom,`- saidV pis,-l 4 toned stem 'norlmally held in low position with the port outlets closed and adapted to v i be actuate into raised position'by ihydraulic pressure. and to'open said ports whenso actuated, automatic means for return-ing the pistonedbstem to normal position upon the d 'release of the hydraulic pressure; and drilling jaws pivotally mounted within the body portion and adapted to be distended therefrom by` said pistoned .stem when saidl stem',A is .in a raised position.`

3.v An.I .expanding and contract-ing rotary low pistoned stem-disposed withih'the body portion adapted' to be reciprocate@ therein,

'reamer, comprisiuga body portion -adapt- 'ed to engage with the drilling stem,a holport outlets disposed at the lower end of the.`

pistoned stem, said port outlets being normally clsedby an encircling band disposed in fixed position within the body portion,

'hydraulic pressure means -for reciprocating .the p1stoned stem 1n one direction and a compression spring for returning the same to normal position and means about the pistoned stem adapted to vdistend drilling jaws hinged'within the body portion when the pistoned stemf-is reciprocated bythe 'hydraulic pressure means.

4. 'An expanding and-contracting rotary reamer comprising split shell members semembers, ring bands disposed about, said shell members4 and in pressed relationship therewith, a. pistoned stem slidably maintained within said shell, longitudinal slots disposed in the walls of said shell members, drilling jaws. pivotally maintained in4 sald slots, a'cone shaped headmouted on said pistoned stemyand adapted 'to' engage wlth and swing said' drilling jaws voutwardly Iwhen said pistoned stem is in'ia raised position.

5. .An lexpandingand cbntracting rotary mounted about said pistoned stem in limited l slidable relationship' therewith, a compres- .cured together by upper and. lower head sion spring placedaboutsaid pistoned stem,

and adapted to-maintain it in a normal lowerinoperative. position, and means to raise-said lpistoned stem' in'an operative position, 'and'to cause said conical head to con-l the "Same outwardly Comprlsm a Cylinder vformed'in the lower head' mem er, apiston formed about the -lower extremity oflsald so I,

A an'upper and 'a split shell members pistoned stem, ,and slidably4 maintained in said cylinder,'and actuated byuid pressure. v

6. An expanding and contracting rotary reamer comprising spliti shell members, formed at their extremities lower head member secured to and about'theextremities of the saids lit shell members and therewith, ring bandsv placed about said and in pressed ,relationhaving threads shi herewith; a pistoned stem mamtained within said-(shells, longitudinal slots formed -in the side Walls of said shell limited sliding motion of lstem,

in threaded. relations ip -1 slidably vcal head to engage faces of saidtoned stem and the base of the conical head,

said recesses adapted to receive the rings of the sleeves therein, and .the recess in the head being of a reater Wid'ththan the ring to be received"'terein, and a com ression spring disposed about conical head, and the other engaging with al shoulder 'of the sleeve; a compression spring placed about said pistoned stem, and adapted ,to maintain itinaJ normal inoperative position and means to raise said pistoned stem to a position to cause said coni- .with said drilling jaws and thereby swing 'said jaws outward to "an operative position, comprising a cylinder formed in the lower h ead member, a piston form'ed about the extremity of the said pistoned stem, and

cylinder by fluid pressure. d

., CARL R. SAMUELSON said stem, an having" one end engaging with a shoulder of thc.- l

slidably actuated inv said 4U

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