USRE16051E - Reamer - Google Patents

Description

April 21, 192s Re. 16,051

v J. S. BROWN REAMER 5 Sheets-Sheet l Original Filed Nov. 4, 3.91?

April Z1, 1925.

J. S. BROWN REAMER Original Filed Nov. 4l ;91 9 3 SheetslSheet 2 R. 16,051 J. S. BROWN REAMER Original Filed Nov. 4. 1919 l3 Sheets-Sheet Reissued Apr. 21, 1925.

UNITED STATES PATENT OFFICE.

JACOB S. BROWN, OF LOS ANGELES, CALIFORNIA, ASSIGNOR OF N'HALF T0 WALTER F. EICHENHOFER, OF LOS ANGELES, CALIFORNI REAMER.

. Original No. 1,390,876, dated September 13, 1921, Serial No. 335,739, filed November 4, 1919. Application l for reissue filed August 11, 1923. Serial No. 656,905. u

'0 all whom z't'mag/ cormern Be it known that I, .lecon S. .BROWN a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Beamers, of whichl .the following is a specification.

This invention has reference to well drilling apparatus.

` The object of the invention is to produce a combined` bit andv reali-ier having means whereby lthe reamer jaws will be pocketed in the stock of the bit, as the bit passes through the casing, and whereby the reainer jaws will be expanded, and locked in operative position after passing through the end of the casing.

A further object of the invention is to produce a drill for oil wells'or the like hav ing reamer jaws `associated therewith and normally-pocketedtherein, means being provided for locking the jaws in thcgr pockets, means being also provided for expanding or swinging the jaws angularly with respect. to the bit stock when the same are brought to operative position. and means being also providedtor permitting the jaws to be again received in their pockets when the bit is Vto be yremoved l'roin the well casing.

Alt is astill further object of the. invention vto provide a' hit for well. drilling devices having reainers associated therewith and Aconnected"thereto insuc-h a .manner as to beA .effectively housed or poelieted in noinopera tive position and firmly sustained in operativey position, means actuated by contact with the v'Well casing being provided for auto- -matically housing ,the reamers when the bit `is withdrawn from the casing.'

Other objects and advantages Will present themselves as the nature of the invention is better understood, reference being had to the accompanying drawings, in which v Figure 1 is an elevation ot the improvement.

.Figure 2 .is a similar View, parts being broken away, and taken at a right angle to thc showing in Fig. '1.

ythe numerals 20.

Fig. 3 is an approximately central longitudinal sectional View therethrough.

Fig. 4 is a similar view but taken at right angles to Fig. 3.

ig. 5 is a sectional. view illustrating the manner in which the reamer jaws are brought to non-operating position when the blt is to be withdrawn from lthe Well casing.

6 is a vtranverse sectional view approximately on the line 6`6 of Fig. 3. i

Fig. 7 is a perspective View of the spring infiuenced jaw mandrel.

Fig. is aperspective view ofone of the reamer jaws.

The bit stock is indicated by the numeral, 10, and comprises a'm'einber which is round 1n cross section. The stock, at the lower end thereof is integrally formed with the bit '11. The ybit is provided byv preferablyy uf'idening the end of the stock, beveling the same inwardly touf'ardthe center thereof as at 12 d reducing the sides of the stock for the length ot' the bit, and further centrally depressing or channeling the reduced sides as indicated by the characters 1.3. The. stock, above lthe bit 1l isprovided, for a deter` mined length, with an opening 14, that passes through the stock from the sides thereof on which the sides ot the bit are torn'led. The stock 1() is rounded lo the flat edges 16 on the wide sides of the bit., and the walls ofthe opening, at the said rounded' portion of the stock are cut to provide pockets 17, and the upper'walls of these pockets are notched as at 19. The sides of the bit, at the end thereof adjacent the opening let are beveled inwardly toward the said opening as indicated by The upper wall of the opening has a rectangular passage 21 in thel center thereof which communicates with a round bore that extends from the outer o1'- upper end of the stock. Arranged in a transverse socket 27 inthe stock. at the rectangular assage 21 therein is a key 23. The key lies its outerend formed with a head 24.-, and the upper corner of the saidhead is rounded as at 25. This head is designed to be received in a notch 26 on one side of the stock and which notch, of course, communicates with the socket 27. The key is inuenced by a spring 28 that is received in the inner portion of the socket 27 so that the head of the key is normally forced outwardly of the stock. The key is provided witha notch 29 on one of the sides thereof, the said notch being of a length approximately equaling or slightly greater than the width of the passage 21 and the spring 2S influences4 the key so that the inner shoulder 30 provided by the notch in the said key is received in and partly closes the rectangular passage 21.

The mandrel for the reamers comprises rod member 31 having its outer end threaded and its inner cud provided with asubstantially rectangular head portion 32. This head is of asize to be snugly received in the rect-angular passage 21, the rod being received in and projecting outward of the bore 22. The head 32 has one of its edges notched as at 33 and below t-he notch is provided on both ogits sides with transverse grooves 34. AboveJ the notch the head is provided with a round opening 35. The head 32 ot' the mandrel passes through the notch 29 in the key 23, and when the notch on the said head of the mandrel is brought opposite the socket 27 the spring influenced key will bring the shoulder 3() into the notch 33, thus locking the mandrel in one position with respect to the stock and with respect to the opening 14 in the stock. The stock is provided with an opening 36 designed, when the mandrel is brought to a second position to register withy the opening 35 in the head thereof, and; adapted to pass through these registerihg openings is a 3T which locks the mandrel in one position and which holds the reamers against opening or being brought to operative positions The pin is only applied, when the stock is conveycdfrom place to place or is not de- .sii-ed lor immediate use. v

b-urrouiulingthe stem 31 of the mandrel is a helical spring 38. The lower end of this spring finds a bearing on the shoulder provided by the inner wall of the bore 22,

1 and its outer tend in contacted by a washer a3i) which is adjustably engaged by a nut 40 which is screwed on the outer and threaded end of the stem 31.

. `The outer end of the stock isprovided with a conical boss 41 through which the round opening in the said stock passes. This boss is provided with exterior threads which are designed to co-engage with interior threads inA a` truste-conical opening in the lower end of the cap 42 .for the stock 10. The cap 42, :above its conical opening is provided with a b`ore 48 receiving therein the end of the rod 31, and the said cap has upon its upper and outer cud the usual concshaped lthreaded extension 44 toreceive the socket end of operating rod. p l

The reamer comprises two similarly constructed reamels 45 each having a substantially rectangular shank 46 and a widened toot-hed portion 47 extending from the shank. rIlhe shank of each of the jaws is provided with a reduced extension in the.

nature of a right angular flange 48, and each of these flanges is provided with a pair of spaced angle slots 49 and 5() respectively.

The flanges of the respective jaws are designed lfor lapping engagement when the respective reamers are arranged in the opening 14 of the stock. lVhen so arranged the angle openings of the respective flanges aline. `Ledges 51 areformed at the outer ends of slots 52'4in each of the flanges at the upper edgesthereof. These ledges are received in the grooves 34 on the head 32. Bolt members 53 and 54 respectively are passed through alining openings in the sides of the stock 10 and through the angle openings in the flanges The heads of the bolts are kerfed and are received in depressions 55 in the sides ofthe stock. Nuts 57 engage the bolts 53 and 54 and are received in depressions or pockets 58 on the opposite sides of the stockl 10 and these nuts may be castellated or have their opposite edges provided with kerfs 59.

The toothedportion 47 of each reamer 45 has its inner face extended beyond its shank and the inner corners of said extensions provided with lugs 60 that are designed to be received in the notches 19 when the reamers are in operative posrtion. The inner face of each of thev said tothed portions, inward of one of the lugs, and outward of the flange of the shank is formed with a tongue 61, the 'under face of the said tongue being beveled as at 62. These tongues are designed to ride over the beveled surfaces 20 at the upper edge of the bit 11 and to rest upon the said upper edge Awhen the rcamers are iu inoperative position. Also each of the tongues underlies and rests on the bottoni ot' the flange of the adjacent or (5o-operating reamer as well as contacts with one of the walls of the opening 14, when the reamers are in operative position, whereby to more effectively support and sustain the said reamers in such operative position. In addition to this, the shoulders provided between the Shanks and the toothed portions yof the reamers rest against the upperl walls of the pockets 17 when the reamers are in operative position, while the Shanks and flanges cont-act with the straight side walls of the opening 14 to'additionally support the reamers firmly inoperative position.

lVhen the device is inserted in a. well cas- .ing 463, the key 25 is moved inwardly through the passage 21 against the pressure of its spring 28 to bring the shoulder 30 out lull of the notch 33 in the head 32 of the inandrel. A pressure is exerted in the outer end ot' the` stem 51 to move the mandrel in wardl \v through the stock to cause the inandrel through the engagement of the walls provided by the grooves 8l therein with the ledges 5l on the flanges ot' the reamers to force the reamers inwardly of the stock incident to the arrangement of `the bolts 53 and 5l in the angle slots 45 and 50 on the flanges of the said reaniers. The bitis forced downward through the casing, and after the upper ends of the shanks of the said reaniers pass the lower edge of the casing, the spring 28 will force the key 23 outwardly through the passage l :27, the spring BS in the meantime having moved the mandrel upwardly ot' the stock7 so that the shoulder 30 provided in the slot 29 ol the key will be received in the notch 33 of the mandrel 32. rlhis upward movement of the. mandrel influences the reainers to their outward and operative position, the bolts 53 and 5st being now arranged in contacting engagement with the lower walls provided by the vertical passages in the angle slots 49 and 50. When 'an upward pull is exerted upon the Ystock thetrounded corner 25 of the key will be contacted by the lower edge of the casing, again forcing the same inwardly of its passage andthe shoulder thereof out ol the notch in the head 32 of the inandrel. A further upward pull of the stock through the casing will bring the upper and rounded corners 46 against the lower end of the casing, moving the said reaniers downwardly and causing the saine to be moved inwardly to their initial position against the tension of the spring 38 of the mandrel after the interengagiug elements between the reainers and the stock have been brought out ol such engagement.

From the foregoing Adescription taken in conjunction with the accompanying draw ings` it will be manilest ythat I have provided a reamer tor wells in which the stock and blades or cutters are constructed so that the cutters are etl'ectively supported in operative position to withstand the percussions, stresses, and circumferential strains to which they are subjected during operation ol the reainer. Further, the stock and cutter construction reduces toa minimum the possibility of the cutters being broken and `lost in a well.

After having described and ascertained ,the nature ol my invention, what l claim as new iS:

l. A drill 'well` casing including a, stock, having an integrally formed bit at the lower end thereot and having a transverse opening above the bit, reamers having upper rounded corners and having lapping flanges which are received in said opening, means between the gne'. to be. passed through a flanges and the Stochr for permitting a limited longitudinal and lateral movement otl the reamers through the opening. spring means for influencing the reamers to an outward and angular position with respect to `the stock, interengaging means between the the lower end ot' `the casing when the stockl is moved upwardly toward the casing whereby to release the latcliing means and to exert a `downward pressure upon the rounded corners of the reamers to move the latter against the influence of the spring means to bring the interengaging means therebetween out of such engagement and the contacting elements out ot contact with the stock and to again seat the reaiiiers in the opening in the stock.

2. A drill designed to be passed through a well casing, including a stock having an integral bit at the lower end thereof and having a transverse slot above the bit, oppositely arranged reainers having flanges received in the opening, said tlaiiges having oppositely arranged alining angle slots therethrough, bolt members passing through the stock and received in said slots, said flanges having ledges at their upper edges, a mandrel having a slotted portion receiving the ledges, said mandrel also having a `notched edge, and a projecting stem, spring means between the stem and stock tor intluencing the mandrel in an upward direction through the stock, a laterally movable spring' influenced latch having an `outer rounded head designed to engage mandrel when the latter spring to move the through the opening in is influenced b v its reaiiiers upwardly the stock. and to in the notch ot theV ltlt) lli) cause the angle walls ol the slot therein to be influenced by the bolts and project said reaiiieis at an out fard angle with respect to the stock, tongues on the respective reamers lengaging the stock when .the reamers are in such position and said latch and reainers designed for engagement with the wall of the bore of the casing when the drill is passed through the casingy torliringiug l r l Athe latch to unlatching position and toil iiililuencing the eamers to an inward and inoperative position in the opening in the stock. i A c 3. A drill and reamer designed to he passed through a well casing, comprising a stock having' a bit at the lower end thcreo't' and having a transverse. opening above the bit, reamers disposed in said openings, cach l operative position, said locking means normally projecting laterally from said stock and, on engaging the wall casing, releasing the saidniandrel to permit movement ol said ream'ers into inoperative position.

4. 'A drill and reainer designed to he" passed through a well casing, comprisingV a stock having a bit at the lower end thereo't' and having a transverse opening above the bit, reamers disposed in said openings, each reainer having a pair of angle slots, pins passing through said slots and secured to said stock, said angle slots being formed so lthat when the pins occupy the upper end of said slots theneamers are in inoperative position, ,and'wlien the pins occupy the lower end of said slots `the reaniers are in operative posit-ion, means urging to move said reamers into operativeiposition, means `for locking lsaid icamers in operative position, said locking means normally projecting beyond the body of said stock and adapted on engaging the inner Wall of the well casing, to release said reaniers and permit n'iovement thereof into inoperative position. 5. A reamer designed to be passed through la Well casing, comprising a stockhaving a. transverse opening, a pair of reainers disposed in said opening, said reamers having overlapping flanges and each reamer being provided with a pair of angle slots', pins passing through said slots and secured to Isaid Stock, said anglc'slots being formed so l-hat when the pins occupy the upper end .ol' said slots the reamers are iii'inoperativd position, and when the pins occupy-the lower end of said slots the reamers are in operative position, a vertically movable mandrel operatively connected to said reamers, a spring urging to move said mandrel upwardly and said reaniers into operative position, and means locking said mandrel against movement and adapted, on engaging the inner walls of the well casing, to release said mandrel, permitting said reamers to move into inoperative position.

6. A drill and lreainer designed to be passed through a well casing comprising a stock having a bit at the lower end thereot and having a transverse opening above the "bit, a pair of reamers disposed in said opening, each ieamer having a shank. a flange extending :from the shank and overlapping the flange of the other reamer, a tooth portion depending 'from the shank, a tapered tongue on said `tooth portion, the upper' end oi' said bit being beveled for engagement and support of said tongue, and means urging said4 reamers into operative position, lockingmeans holding said first named means against movement when said reainers are in operative position, but releasing said iirst named means onfengaging the well casing and permitting said first named means to move said reainers into inoperative position. i

7. A drill and reamer designed to be' passed through a well casing, comprising a stock having a bit at the lower end thereof,

a pair of reamers movable in the stock tooccupy operating and inoperative positions, means for inovingtlie reamers to operating position including a mandrel normally urged upwardly, means including Aa, spring` controlled key for locking the mandrel in' a position in which the reamers are in operative position, said reamers being provided with slots and pinsV passing through said slots and secured to the stock, each of said' pins passing through both of saidvreain'ers and limiting the outwardand inward moveinent of the reamersl 8. A reamer, comprising a stock, reamer cutters movable in the stock and having ledges thereon, a 4mandrel movable in the stock and including a head formed with' grooves. for'reeeiving the ledges, thereby providing an operative connection between the cutters and the mandrel, means co-acting with said cutters to limit the movement of the cutters into operative and inoperative tions, said mandrel including a notched head movable across said socket, a spring urging said mandrel upwardly/a key movable in said socket, having a notch therein to engage said head and lock the samefagainst movement, said key being-normally urged to a position in which its notch locksY said head, a head formed on vthe key adapted to lbe disposed Within the first notch, and a'pair ot under reamer cutters operatively connected to said mandrel.

10. An under reamer, comprising a stock having a passage therein, a socket intersecting the passage, a mandrel movable-'in said passage, cutters provided at their upper ends willi ledges, the mandrel being promiV lll0

lau

vided :it its lower end with a head formed with grooves for the reception of the ledges of said cutters, thereby forming an operative connection therewith, a notch in said head, a key disposed in said socket, and adapted to lock said head against move'- ment, said key projecting laterally from said steek and adaptedhwhen the said key engages the well casing, to release the head.

of the mandrel, whereby the irland-rel is per- 10 mitted to move the cutters into inoperative position.

vIn testimony whereof I'have signed my name to this specification.

JACOB `s. BROWN.

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