US1647269A - Roller bit - Google Patents

Description

Nov. 1, 1927. 1,647,269

C. H. M. BULL ROLLER BIT Filed Aug. 15, 1927 2 Sheets-Sheet l gwuvntoz EI-B 2 /JM +1. 714.3%

Nov. 1, 1927.

'2 Sheets-Sheet 2 C. H. M. BULL Filed 1 412.15, 1927 Patented Nov. 1927.

UNITED STATES PATENT orrics.

CLINTON H. M. BULL, OF HOUSTON, TEXAS, ASSIGNOR TO REED ROLLER. BIT COMPANY, OF HOUSTON, TEXAS, A CORPORATION OF TEXAS.

ROLLER BIT.

Application filed August 15, 1927. Serial No. 212,995.

' This invention relates to deep well drilllug apparatus, and more particularly to roller bits for use in rotary boring drills.

Roller bits have heretofore been v used wherein side -roller cutters and cross roller cutters have'been mounted, the former being positioned on the sides of the head in planes converging in the head, and the latter extending diametrically across the head between the former and at right angles thereto.

It is the object of this invention to provide a new and improved means whereby cross roller cutters can be mounted between and in the same transverse plane with side roller cutters. s

The invention has as a further object the provision of a brace between the spindles of roller cutters disposed on opposite sides of a head. Y

Another object of the invention is to provide a head and a spindle having new and improved cooperating elements, whereby a roller cutter can be quickly and easily mounted in and removed from the head.

A further object of the invention the provision of a newand improved sectional roller cutter.

Various objects, other than those above enumerated, will appear from the following description and the accompanying drawngs.

Referring to the drawings, Fig. 1 1s a fragmentary and partly sectional side elevation of the assembled bit; Fig. 2 .is a sectionon the line 2-2 of Fig. 1; Fig. 3 is a diagrammatic bottom plan view; Fig. 4 is a section on the line 4-4 of Fig. l; and Fig. 5 is a section on the line 5-5 of Fig. 1.

Referring more particularly to the drawings, a two-piece bit head is indicated at 1, the two parts of the head having grooves in the meeting faces thereof adapted when alined to form slush course l". Each of the two pieces of head 1 has the inner side of the lower end thereof beveled as at 2, whereby the two pieces form a head having a substantiall V-shaped recess in the bottom thereof. T e outer sides of the lower ends of said pieces are recessed as shown at 3, and have bores 4; therethrough leadin downwardly and inwardly. Annular anges 5 .formed on said pieces project into the central recess of thehead adjacent bores 4.

Bushings 7 surround flanges 5. g

key 6 This key and slot construction is described and claimed in my application for Letters Patent of the United States filed March 28th, 1927, Serial Number 178,987.

The side roller cutters may be of one-\ piece form as shown at 8, and held on bushlng 7 by spindle 6, the bore of said cutter being "enlarged to receive the enlarged port1on 6 of spindle 6; orelse be made of two sections 9 and 9, similarly held on bushing 7 by spindle 6, the bore of section 9 being llkGWlSB. enlarged to receive enlarged portion 6 of spindle 6. Section 9 has a circumferential recess adjacent its base to receive section 9", as shown. The teeth of section 9 cut the side wall of the hole only. Under ordinary conditions, the teeth of section 9 will become dull sooner than will the teeth of section 9, and when this occurs, a new I section 9 can be used with original section 9 v The lower ends of the parts of a twopiece bit head, and the corresponding depending projections of'one-piece heads, are subjected to great strains, and at times bend inwardly, thereby putting an end to the efficient operation of the roller cutters carried thereby. This invention provides new and improved means to positively prevent suchinward movement. L

Each of the enlarged portions 6 of spindles 6, has a substantially cylindrical recess, and a socket in the lower wall of said recess to receive one end of a pin 10, pin 10 having a plurality of frusto-conical cross roller cutters 11 thereon, said cutters being of various lengths so that trackin thereof will not occur, Pin 10 is locke against rotation in the sockets.

Pin 10 has screwed thereon, adjacent the ends thereof, bearing collars 12, said collars snugly fitting the sockets in the lower walls of recess 6".

To strongly support pin 10, rings are provided either integral therewith, as shown at 10, or separate therefrom as shown at 13. Separate ring 13 is secured against rotation with respect to pin 10 by key 14:. Referring particularly to Figs. 4 and 5, it w1ll be observed that these rings are concentric with the surfaces of recesses 6 to snugly fit the same. A rigid support is thereby provided.

The two innermost and abutting cutters of rollercutters 11, have their meeting faces grooved for the reception of a packing rin 15.

6H ducts '16 may be provided in the head 1 leading to the bearing surfaces of the side roller cutters 8 and 9, and ducts 17 to cross roller cutters 11, as shown. 1

The drawings disclose, and this specificationdescribes, the preferred embodiment of the invention. It is to be understood that the hereinafter appearing claims are not l1m-. ited to the specific form shown, and that various changes may be made without departure from the scope thereof.

Those skilled in the art will at once observe that the invention provides a new and improved arrangement of cutters, and new and improved means to support the cutters so arranged.

I claim:

1. In a rotary boring drill, a head, spindles on said head, cutters on said spindles, and a brace between said spindles and having'its ends mounted thereon.

2. In a rotary boring drill, a head, sp ndles on said head having recesses therein, cutters on said spindles, and a removable brace between said spindles and havlng its ends resting in said recesses.

3. In a rotary boring drill, a head, .spindles on said head, cutters on said spindles, a brace between said spindles having its ends mounted thereon, and means to prevent lateral movement of said brace.

4. In a rotary boring drill, a head, a spindle on one side of said head, a cutter on said spindle, and a brace extendmg from said spindle to the other side of the head.

5. In a rotary boring drill, a head, a

spindle on one side of said head, a cutteIO p on said spindle, a brace extending from said spindle to the other side of the head, and means to prevent lateral movement of sa1d brace.

6. In a rotary boring drill, a head, inwardly projecting spindles on the sides of said head, said spindles having recesses in their inner ends and pockets in the walls of said recesses, cutters on said spindles, and a brace having its ends extending into said recesses and fittin in said pockets.

7. In a rotary oring drill, a head, Inwardly projecting spindles on the sides of said head, said spindles having-recesses in their inner ends, cutters on said spindles,

and a brace, having its ends fitting in said recesses and extensions resting on the walls of said recesses to support said brace.

S. In a rotary boring drill, a head, inwardly projecting spindles on the sides of said head, said spindles having recesses in their inner ends, cutters'on said spindles, and a brace having its ends fitting in said recesses and having concentric rings resting on the walls of said recesses to support said brace.

9. In a rotary boring drill, a head, side roller cutters mounted on the sides of said head, and cross roller cutters mounted between said side roller cutters and extending from one side roller cutter to another.

10. In a rotary boring drill, a head, spindles on the, sides of said head, side roller cutters on said spindles, a pin having its ends attached to said spindles, and cross roller cutters'on said pin.

11. In a rotary boring drill, ahead, spindles on the sides of said head, side roller cutters on said spindles, a pin having its ends attached to said spindles, means to prevent lateral movement of said pin, and cross roller cutters on said pin."

12. In a rotary boring drill, a head, in-

wardly projecting spindles on the sides of said head, said spindles having sockets therein, a in having its ends fitting in said sockets, si e roller cutters on said spindles,

and cross roller cutters on said pin.

13. In a rotary boring drill, a head, inwardly projecting spindles on said head, said spindles having recesses therein, a pin having its ends fitting in said recesses and having extensions resting against the walls of said recesses to support said pin, side roller cutters on said spindles, and cross roller cutters on said pin.

14. In a rotary boring drill, a head, inwardly projecting spindles on said head, said spindles having recesses therein, a pin having its ends fitting in said recesses and having concentric rings thereon, said rings resting against the walls of said recesses to support said pin, side roller cutters on said spindles, and cross roller cutters on said 15. In a rotary boring drill, a head, a

spindle on one side of said head, a side roller cutter on said spindle, a pin having one end attached to said spindle and the other end supported in the other side of said head, and cross roller cutters on said pin.

16. In a rotary boring drill, a head, a spindle on one side of said head, a side roller cutter on said spindle, a pin having one end attached to said spindle, means to prevent lateral movement of said pin, and cross roller cutters on said pin.

17. In a rotary boring drill, a head, spindle onsaid head, and a cutter on said spindle, said cutter being made of two separable sections, one of said sections havin a circumferential oove in one end thereo and the other of said sections being mounted in said groove. I

18. In a rotary boring drill, a head, a. spindle on said head, and a cutter on said spindle, said cutter being made of two separable sections, one of said sections having teeth operating on the bottom of the hole and the other of said sections having teeth operating on the side of thehole.

19. In a rotary boring drill, a head, a spindle on said head, a side roller cutter on said spindle, a pin having one end mounted in said spindle, and cross roller cutters 15 mounted on said pin immediately adjacent 2 each other, the adjacent faces of said cutters being grooved, and a packing ring between said cutters and fitting in the grooves of said faces.

In testimony whereof, I hereunto affix my 2 signature.

CLINTON H. M. BULL.

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