US1614649A

US1614649A - Machine for dressing bits

Info

Publication number: US1614649A
Application number: US682125A
Authority: US
Inventors: Charles A Butler
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-12-21
Filing date: 1923-12-21
Publication date: 1927-01-18
Anticipated expiration: 1944-01-18

Description

C. A. BUTLER Jan; 18, 1927.

MACHINE FOR DRESSING BITS Filed Dec. 21. 1923 3 Sheets-Sheet 1.

1,614,649 (2. A. BUTLER MACHINE FOR DRESSING BITS Filed Dec. 21. 1923 3 Sheets-Sheet 2 4 Q I] Ne anw H Jan.

1927' c. A. BUTLER MACHINE FOR DRESSING BITS Filed Dec. 21. 1923 3 Sheets-Sheet Patented Jan. 18, 1927.

UNITED STATES CHARLES A. BUTLER, OF OKMULGEE, OKLAHOMA.

' MACHINE ron DRESSING mars.

Application filed December 21, 1923. Serial No. 682,125.

This invention relates to machines for dressing drilling tools, and more particularly to a portable machine for dressing drilling bits directly at the drilling well.

In drilling oil wells, the bits that are used to cut the rock are subjected to constant wear; the sides of the bits will wear off until the bit is too narrow to drill a full sized hole, and sometimes the bit will batter or break off to such an extent as to preclude its further use. In this case, the bit must be unscrewed from the drilling stem, heated and dressed back to proper shape. The dressing is mostly done by means of hand operated sledges, although other means have been employed to some extent, such for instance, as rams,'rigged temporaril'y to the machine at the well, which necessarily stops the drilling while the ram is being used, and also steam hammers have been used now and then. However, steam hammers have not been successful for the reason that they are very hard for an inexperienced operator to handle and they do not strike a sufiiciently hard blow.

One of the objects of the present invention is to construct a special power-driven machine for dressing bits, which machine is portable so that it can be set up directly at the mouth of the well, and is ready for instant service without interfering with the drilling operation.

One of the particular features of this in i'ention resides in the novel arrangement of rugged framework for supporting the power-driven dressing tools, which framework is capable of being quickly set into position and is ruggedrenough to stand the hard, use required in the dressing operation.

Still another object of this invention resides in the novel arrangement of supports, with particular reference to mounting the dressing tool thereon so that the dressing tool can be quickly shifted to any desired a position whereby to dress the required surface of the bit.

Still another object of this invention resides in the arrangement of the dressing tool with relation to the anvil supporting the bit whereby such supporting means constitutes a most rigid guide for taking up the shock caused by the impact of the dressing tool on the bit.

Another feature of the invention resides in the novel manner of constructing the anvil for the dressing tool so that the anvil can be reversed to receive the different faces of the dressing tool.

Still another object of the invention rei nection from the prime mover to the dressing'tool may be readily controlled.

These and other objects will be apparent from a perusal of the following specification when taken in connection with the accompanying drawings, wherein Figure 1 is a side view of the entire device showing the bit in position to be dressed;

Figures 2 and 2 represent a plan View of the same;

Fig. 3 is a section on the line '3-3 of Fig. 2;

Fig. 4 is a section through the line 4-4 of Fig. 3, and

Fig. 5 is a section through the line 55 of Fig. 3;

Fig. 6 is a side elevation on an enlarged scale of the motor and its driving connections.

Referring now to the drawings in detail, the device comprises four metallic frames A, B, C and D of channel-like cross section. Each of these frames is substantially U-shape in outline. The main frame A constitutes the base or support for the device and is adapted to rest upon the ground. This frame A is connected to and supports at one extreme end the substantial upright frame B. As shown in the drawings, this frame B inclines slightly rearwardly and is braced in such position by the braces B. The upright frame B in turn is provided with a series of bolt holes 1 to provide an adjustable pivotal connection for the swinging frame 0. This pivotal connection is formed by bolts 2 which passv through the holes 1 in frame B and through a similar series of horizontal perforations in the swinging frame C. By this means, the pivotal bolt 2 of the frame C can be raised or lowered, and likewise this pivotalpin can be shifted to the right or to the left. This constitutes a very simple and rugged adjustment. For the purpose of swinging frame C through the arc of a circle, the frame is provided at its outer end with the

pulleys

3, 4, 5 and 6, which pulleys are arranged 1n pairs at the corners, so that a rope or steel cable 7 can pass around the outer end of frame Cl This rope is connected as at 8 to one end of the uprightframe B, and the other end of the rope passes around a pul ley 9 mounted on the upper surface of the frame B, and thence downwardly to the hand operated winch 10 carried by the frame B in easy reach of the operator standing on the ground. In addition thereto, the swinging frame C is provided on its outer end with a suitable eye 11 carrying a chain 12 which can be fastened tov the floor to hold frame C in any horizontal adjustment. The opposite arch-shaped end of'the' basal frame A forms: asupport for the rear end of the hit when it is positioned ready for dressing; rt this end, the frame A is provided with horizontal flanges 13, fortified with a series of holes 14 adapted to receive bolts1i5, which bolts secure in position the rest for the rear end of the bit. This rest, as shown, is formed with two

cross bars16

1 and 1 7, the former being: recessed to receive the rear c'olla-ron the bit, and the latter provided with a seat to snugly receive the extreme'rear endof the bit. By means of the holes 14 and the. bolt 15,. this bit seat may bemoved forwardly and backwardly on the frame A to accommodate bits of. varying lengths. The forward end of frame A also constitutes a seat for the dressing hit anvi]; This seat comprises an anvil frame 18 preferably formed with spaced uprights 19 recessed ontlieir upper surfaces to receive sidelugs or trunnions 20 projecting laterally from the anvil 21. In addition, the anvil frame is provided with laterally extendingbasal ears 22 which rest in the flanges of the" frame A, whereby the anvil frame is firmlyheld.

The anvil is provided with upper and lower surfaces of different shape sothat .when the bit is turned over; it will accom hmodate' the bit without substantially alteringi' its position relatively to the desired ad'- justment ofthe dressing tool. For instance, in Fig. 2', one face of'the anvil is shown as provided with projecting studs 23 which constitute stops or guides to hold the dressing tool from lateral shifting; n'iovement. The reverse face or the anvil provided with steppecl-lilte recesses 24 of proper design in cross section to adequately hold the bitinvarious adjiisted positions. For instance; in Fig. f, two different positions of the bitare illustrated and show the manner in which it is supported onthe anvil. This manner of mounting the anvil loosely in the anvil frame constitutes a very, quick and convenient means for permitting a speedy seating of the dressing hit so that various surfaces thereof can be held securely on the anvilfor dressing.

The? novel shape of this anvil provides a very desirable feature of the invention for the reason that the stepped face provides surface on which very large bits may rest on their sides while being spread, and also will permit the bits to be turned up on edge to dress the points, whilebeing spread, such for instance, as indicated at P of Fig. d, and also permit the bits to be turned up on edge to dress the points as shown in dotted line position at P of Fig/1 In this position, the bit will rest on the lower face P of the anvil which is much lower than the steps 24. For instance, a bit twenty-four inches wide will lay onthe upper steps of the face of the anvil as illustrated in position P of- Fig. 4:, while a bit twenty inches wide will lay on the lower steps, and a bit fifteen inches wide, will lay on the bottom face P For dressing bits of smaller size, the anvil may be turned over with the reverse face up, and the small bits will beheld in place by means of'tlie pins 23; Anvil 21- may also be fitted with grooves for holding underreamer cutters which are required to be dressed.

The power operated tool for dressing the bit, together with the prime mover for operating the tool, are carried by the swinging frame Cl It is necessary that this dressing tool be mounted on the swinging frame C in such a manner that when the frame C is swung about its pivot 2 by means of the cable 7, the dressing tool will be disposed so that it can operate on any desired portion of the dressing bit mounted on the anvilzl'. Furthermore, it is highly desirable to so mount the dressing tool on the swinging frame C so that the dressing, tool can be raised and lowered vertically and can also be shifted transversely of the anvil; inshort. it is highly desirable that the dressing tool have a substantially universal mounting so that it can attack the dressing bitfrom most any angle. To this end, the swinging frame C, is provided with an inner frame D, likewise of channel cross sectiom'and liliewise substantially U shaped. The channeled flanges of these frames'@ and D face in-.

wardly, and since the inner frame D is of less width than the frame C, the flanges of th latter Wlll nest within the flanges of the former, by which construction. the frame C is firmly guided for shifting movement along.

the frame 1). Means is provided for positively moving the frame D back and forth on the frame C. This is accomplished by means of a screw 25 which threads through the arch-shaped end 26 of the frame C. Screw 25 is provided with a hand wheel 2? and lock nuts 28 whereby the screw may be quickly turned and may be locked in desired adjusted position. The inner end of this screw is provided with a swivel connection to the frame D. This swivel connection is forn'ied by means of a block. 29

which is bolted to the arch-shaped end 30' of the inner frame D, by means of the uplill) per and lower plates 31, which in turn form bearings for a pivotal .bolt 32 passing through a perforation in a coupling 33, which is provided with furcations ,34 arranged in a horizontal plane, or rather in a plane transverse to the axis of the bolt These furcations 34 in turn provide bearings for a pivotal pin 35 which passes through a lug 36 integral with the rear portion of the engine bed 37. In this manner, the engine bed is universally mounted with respect to the frame D so that it may shift in the desired direction. The engine bed 37 is provided with spaced bearings 38 for a shaft 39, which shaft is provided with a crank arm connected by means of a pitman 40 to awrist pin 41 which reciprocates the dressing tool as will be hereinafter described. Shaft 39 is provided on its opposite ends with fly wheels 42. These fly wheels are driven by two friction wheels 43 mounted on a shaft 44 on which is mounted a gear 45 meshing with a smaller gear 46 on the shaft of the motor 47. It is manifest that instead of an electric motor, a steam turbine engine may be used as a prime mover.

The motor 47 is mounted on a bracket 48 pivoted to the engine bed at 49. The opposite end 50 of this bracket extends in the shape of an arm transversely across the motor shaft 44. This arm is perforated to receive therethrough an upright bolt 51 which screws into the engine bed 37. This bolt has coiled therearound a spring 52 which is adapted to resiliently support the outerarn'i 50 of the bracket 48. The upper end of the bolt 51 is suitably slotted to receive a sliding block carrying a pivotal pin 53 on which is mounted a lever 54 having an eccentric nose. The sliding block is adjustably held in the slot by means of an adjusting screw 55 threading through the tube of the bolt 51. By regulating the position of this block, the pressure of the eccentric nose of lever 54 on the bracket arm 50 may be adjusted to suit. It is manifest that when the lever 54 is de-.

pressed, the eccentric nose thereof will press the arm 50 downwardly against the tension of spring 52, so as to force the friction wheels 43 into contact with the periphery of the fly wheels 42 to rotate shaft 39, whereby to actuate the tool about to be described. Obviously, the same result may be accomplished by providing a. belt drive around the periphery of the fly wheel and over the friction wheels 43, in which case, the action of the lever 54 and spring 52 will be reversed to break and make the drive connection.

The forward portion of the engine bed 37 in line with the crank shaft 39 is provided with a threaded bearing 56 in which screws a sleeve 57 extending forwardly of the engine bed. This sleeve 57 constitutes a long cylindrical bearing for the piston head 58, the inner end of which is in the shape of a block 59 having a central recess to which the pin 41 is screwed. The pin 41, of course, connects with the pitman 40 running to crank shaft 39. The forward end of piston head 58 is shaped as a hollow sleeve-like extension provided at its outer end with threads into which screws a block 60 having a central bore. This central bore forms an elongated bearing for the dressing tool 61. The dressing tool is preferably shaped as a straight round plunger-like body having at its inner end a flanged head 62. This head forms an abutment on one side between which and the block 60 is coiled a spring 63. On the other side of head 62 is coiled another spring 64 which abuts at the opposite end against the cross head 59 of the piston.

It will be obvious that when the motor is running and a driving engagement is made by means of the lever 54, the piston 58 will be forced back and forth very rapidly, and as the hammer 61 is held between

springs

63 and 64, the rapid forward and backward movement causes the hammer to compress these springs at the end of each successive stroke, thereby giving the hammer a far greater travel on each stroke than its enclosing tube-like piston 58, and causing it to strike hard blows in rapid succession. A number of these blows may be controlled by the lever 54. For instance, one blow may be delivered at a time, or a series of blows, as the case may be, or by leaving the lever 54 down in which position it will stay, due to the fact that its eccentric head turns past the center thereof, the hammer blows Will be made continuous, so that the operator may use his hands for adjusting the height and direction of the blows from the hammer by meansof a certain arrangement of mecha-.

nism. To this end, the tube 57 is freely mounted in a ring 65 which is pivotally mounted on the frame 66 by means of pins 67. The frame 66 is bolted to a block 68 which is internally threaded to engage the threads of a screw 69 transversely mounted between quadrants 70. This screw 69 is provided at one end with a beveled gear 71 meshing with a gear 72 on the end of a control shaft 73 having a hand wheel 74 to permit rotation of screw 69. The head of the lower pin 67 is formed as a sleeve 75 to slidingly fit on a rod 76 borne by the quadrant 70. By means of this construction, rotation of the hand wheel 74 will, through the screw 69, move the frame 66 transversely to provide the necessary horizontal adjustment of the dressing tool relative to the face of the bit to be dressed.

The vertical adjustment of the dressing tool is provided by an adjustment of the quadrants 70. To this end, each quadrant is pivotally attached tothe frame D by means of bolts 77. Thesequadrants are anchored together by suitable cross rods and are pnovid'ed with teeth 78 at their outer ends whiclr mesh. witln pinions 79' on shafts 8 0g wlnch shafts ane" in. turn mounted on uprights 81 Welded to the frame 1).. On the outer end of the shaft 80 is keyed a wormgear 82 wliiicln in turn is meshed with a: gear 83 011 a shaft provided witlh a hand wheel 85, which onturning,- will swing the quad:- rant i n a: vertical plane to raise or lower the hammer.

It isobvious that minor changes in the details of construction and the arrangement of the parts mav be made withoutdeparting fromthe spirit of the invention as set forth in the appended claims.

Having thus describcdthe invention, What I clainr as new and desire to" secure by lastters-Patent, is

1 A; device of theclass described comprising a support, an. upright standard on said support,an anvil on said support,a swinging frame having spaced channel beams with the flat faces outward and pivotally mounted on said support,means to shift said frame from a substantially horizontal to a substantially vertical position relatively to said anvil, a second frame in said? first frame and guidin'gly supported by the channels thereof, means for shifting said second frame longitudinally' alon said channels, a prime mover mounted on said second frame, a dressing tool mounted for movement with said second frame, and means operated by said prime mover for reciprocatingsaid tool.

2; A. device of. the class described comprising aatoohan anvil: thereon, a swinging frame pivotal mounted: on said support, a. second frame-carried; by said swinging frame, means for adjusting said: second. frame longitudinalsly of said s-wingingframe, spaced quadrants carried by said second frame, means for arcuately adjusting said quadrants relatively to said second frame, a support carried by said second frame, a dressing tool carried by said support, means for adjusting said dressing tool transversely of said quadrants, a prime mover carried by said second frame, a power drivingconnection arranged between said prime mover and said dressing tool;

' 3'. A device of the class described comprising a support, as 'inging, frame pivotally mounted thereon, a second frame carried by said swinging. frame, means for adjusting said: second frame longitudinally of said first frame, said means including a. swivel connectiomspaced quadrants carried by said second. frame, means for shifting said quadrant in a vertical plane, a-bed carried by said quadrants, a prime mover, and dressing tool carried by said bed, a universal connection between: said: bed and said second frame, and meansv for adjusting said bed transversely of. said second frame.

4.. A device of the class described comprising a basal support, an anvil mounted thereon, a swinging frame pivotally mounted onsaid; support, a. second frame guidably mounted. on said. swinging frame, means for adjusting said second frame longitudinally ofsaid. swinging frame, spaced quadrants pivotally mounted on said second frame, a screw shaft. mounted transversely between said quadrants, a screw carried by and between theupper portions of Silitii quadrant, a rod carried by and between the lower portions of said quadrant, a: frame or saddle threadedly engaging said? screw and. having. a: slidingsleeve engaging said rodia ring pivotally mounted on said frame,

a tube carried by saidring, a dressing tool reciprocatingly mounted: in said tube, an:

engine bed threadedly connected co-one end of said tube, a drive shaft mounted; onsaid engine bed, connections from said? driveshaft to said dressing: to'oh. a prime mover carried. by said. engine bed, power connections between. said prime mover and saic shaft, a universal connection between said engine bed and said second. frame, and.

means to adjust said quadrant, and means to: operate said screw rod to adjust said dressing tool transversely of said second frame.

5. The combination of a support adapted to rest 011 the ground, an upright carried thereby, said. upright having a series of holes arranged in a substantially vertical; plane, a swinging beam having a series of holes arranged longitudinally thereof, a bolt adapted. to pass through the hole in each of the beams and constituting a pivotal mounting to permit the swinging frame to be swung. in the arc of a. circle, a prime mover mounted on said swinging frame, a .c ressing tool carried. by said swinging. frame, a power driving connection between said prime mover and: dressing tool, an anvil supported by said main. frame, and means for swingingi said swinging frame tov alter the position of said dressing tool relatively to said anvil, 1

6. A device of the class described comprisinga basal support provided with substantially upright frame, a pulley fixed to the top of said frame, a winch carried by said frame, a. swinging frame pivotally mounted on said upright frame, said swinging frame being substantially U-shaped, a prime mover carried by said swinging frame, a. reciprocating dressing tool carried by said swinging frame, a power connection between said prime mover and dressing tool, said swinging frame including two pairs of pulleys mounted at the opposed corners of the U-portion of the frame, and a cable connected to said upright frame and passing around said corner pulleys of said frame and thence passing over the pulley mounted on the top of said frame and connecting with the winch, whereby on operation of the latter, said swinging framewill be raised and lowered.

7 A device of the class described comprising a basal support, a power driven dressing tool carried thereby, an anvil frame mounted on said support adjacent the operative end of said dressing tool, said frame comprising uprights provided with semicircular recesses in their upper edges, a reversible anvil provided with circular lugs seating in said recesses, said anvil having on one face spaced upright studs adapted to firmly hold the bit therebetween, the reverse face of said anvil having stepped recessed portions adapted to form a seating for bits of various widths.

8. A device of the class described comprising a basal support, a swinging frame pivotally mounted thereon, an engine bed, carried by said frame, a dressing tool carried by said engine bed, a crank shaft mounted in bearings on said engine bed, a fly wheel on said crank shaft, a pitman connection between said crank shaft and dressing tool, a bracket pivotally mounted on said engine bed over said crank shaft, a rotary prime mover mounted on said bracket, a shaft carried by said prime mover and adapted to be rotated thereby, a friction pulley mounted on said shaft, and means to swing said bracket toward and away from said crank shaft carried by said engine bed whereby to make and break the driving connection from the prime mover to the dressing tool.

9. A device of the class described comprising a basal support, a swinging arm pivotally mounted thereon, an engine bed carried by said swinging arm, a crank shaft and a fly wheel thereon mounted on said engine bed, a dressing tool carried by said engine bed, a driving connection from said crank shaft to said dressing tool, a bracket pivotally mounted on said engine bed over said crank shaft and formed with a projecting perforated arm, a prime mover mounted on said bracket and formed with a friction driving pulley, a bolt carried by said engine bed and passing through a perforation in said bracket arm, a spring coiled around said bolt confined between said engine bed and said bracket arm, a lever pivoted on said bolt above said bracket arm and provided with an eccentric nose, whereby on operation of said lever, the friction pulley will be contacted with or separated from the periphery of said fly wheeL 10. A device of the class described comprising a basal support, a swinging frame pivotally mounted thereon, an anvil carried by said basal support, a second frame carried by and movable longitudinally of said swinging frame, a screw engaging said swinging frame and second frame to move said latter frame lon itudinally of said swinging frame, space toothed quadrants pivotally mounted on said second frame,

cross bars connecting said quadrants, a-

frame or saddle carried by said cross bars and adapted to be moved therealon by a threaded connection with one of said cro bars, an engine bed having a universal mounting in said saddle and a universal support from said second frame, a dressin tool supported by said engine bed an saddle, a prime mover carried by said engine bed, and a power driving connection be, tween said prime mover and dressing tool, a gear meshing with the teeth of said quadrant, a worm meshing with said gear, means for rotating said worm, and means for also rotating said threaded cross support for shifting said saddle crosswise of said spaced quadrant.

11. A device of the class described comprising a basal support provided with a bit dressing anvil, a frame carried by said support, an engine bed carried by said frame, an elongated sleeve having a threaded connection with said engine bed, a piston slidable in said sleeve, a crank shaft mounted on said engine bed and a pitman connecting said crank shaft to said piston, a prime mover carried by said engine bed for rotating said crank shaft, the forward portion of said piston being in the form of a sleeve, an apertured block carried in the open end of said sleeve, a piston having a cylindrical portion passing through the aperture in said block and provided with a flanged head adapted to be reciprocated in the recess of said sleeved piston, a spring coiled between one side of said piston head and the inner wall of said piston sleeve, and a coiled spring surroundin said piston and arranged between said piston head and the block in the end of said piston sleeve whereby on reciprocation of said piston, said springs will function to increase the force {if impact of said dressing tool against the 12. A device of the class described comprising a basal support, a reciprocatin dressing tool mounted thereon, an an frame carried by said support adjacent the operative end of said dressing tool, trunnion supports on said frame, and an anvil having trunnions mounted in said supports whereby said anvil may adjust itself to present its flat upper surface into parallelism and contact with the cutting tool to be dressed.

13. A device of the class described comprising a basal support, an anvil frame carried by said support, trunnion supports on said frame, and an anvil having trunnions mounted in said trunnion supports,

said a nvfl having -on oneface a single *fiat eelected one of Said fl'atsurifabes into "paralsu-rfa'ce 2m i 011 its opposite face a plurality lelism and contact with the cutting t'ool ito of stepped flat surfaces with a, centrzi'l' cut be dressed. 10 awzyyportion {to permit the fiatwise seating In testimony whereof, I affix my signaef -cut ting tools "of various diameters, said ture.

amv'il being self-adjusting about the hori- 'zon'tztl axis of vits 'trunnions to present a CHARLES A. BUTLER.