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Publication numberUS2198849 A
Publication typeGrant
Publication dateApr 30, 1940
Filing dateJun 9, 1938
Priority dateJun 9, 1938
Publication numberUS 2198849 A, US 2198849A, US-A-2198849, US2198849 A, US2198849A
InventorsWaxler Reuben L
Original AssigneeWaxler Reuben L
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Drill
US 2198849 A
Abstract  available in
Images(2)
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Claims  available in
Description  (OCR text may contain errors)

Filed June 9, 1938 2 sheets sheet 1 R. L. WAXLER April 30, 1940.

DRILL 2 Sheets-Sheet 2 Filed June 9, 1958 Patented Apr. 30, 1940 UNITED STATES PATENT OFFICE DRILL Reuben L. Waxler, Kilgore, Tex.

- Application June 9, 1938, Serial No. 212,637

This invention relates to a drill.

An object of the invention is to provide a drill of the character described specially designed for drilling earth formation and embodying the combination with a drill head of rotatable cutting, or abrading means, designed to disintegrate hard formation and a blade, or blades; arranged to cooperate with the abrading means and to operate against the bottom of the bore.

Another object of the invention is. to provide a drill of the character described wherein the bladelike cutters, preferably of the fish tail type, may be held yieldingly against the formation at the bottom of the bore.

In one form of the tool the fish tail type of blade may be mounted unyieldingly in the head with its cutting edges at approximately the same plane in which the abrading rolling cutters operate.

In the. operation of the tool the teeth of the rolling cutters will penetrate into the hard formation, such as rock by leaving the surface of theformation at the bottom of the bore in a roughened state and the cuttingedges of the fish tail blade are arranged to follow the rolling cutters and remove the projections or uneven surface invention has particular relation to certain novel features of construction, operation and arrangement of parts, examples of which are given in this specification and illustrated in the accompanying drawings, wherein: v

Figure 1 shows a side view of the tool, partly in section.

Figure 2 shows a fragmentary, perspective view.

Figure 3 shows a side elevation taken at right angles to the view shown in Figure 1.

Figure 4 shows a'bottom end view.

Figure 5 shows a vertical, sectional view taken on the line 5-5 of Figure 6.

Figure 6 shows a cross-sectional view taken on the line 6-6 of Figure 5.

Figure 7 shows a vertical, sectional view illustrating another embodiment.

Figure 8 shows a cross-sectional view taken on the line 8 8 of Figure "l, and

Figure 9 shows a side view illustrating still another embodiment.

Referring now more particularly to the draw-,

ings wherein like numerals of reference designate of blade 5 whose upper end is fitted into said slot and whose lower end terminates in oppositely directed, transverse cutting edges 6, 6.

.On opposite sides of the blade 5 the head is formed with the cutter anchors l, 1 which may be formed integrally therewith orwhich may be detachably secured thereto. The lower ends of these anchors have the inside downwardly diverging bearing faces 8, ton which the rolling cutters 9, 9 are mounted in any well known and conventional manner, the surfaces of said rolling cutters being toothed in the well known manner so as to penetrate hard formation at the bottom of the bore as the drill is/rotated. The fish tail blade has an axial slot ill cut therethrough and a transverse pin H has its ends anchored to the head and extends through said slot to permit limited axial movement of the blade relative to the head. In the shank 2 there is a strong coil spring l2 whose upper end abuts the lower end of the drill collar 3 and whose lower end rests against the upper ends of the plungers l3, l3 which work through vertical bearings in the head and whose lower ends rest against the upper end of the blade 5 to hold the blade in its lower position with its cutting edges 6, 6 beneath the rolling cutters 9.

The drill collar 3 and the shank 2 are tubular to permit circulation of the drilling fluid down through the drill stem and the head has suitable water channels l4 through which the drilling fluid may pass to the bottom of the bore.

In operation the tool is lowered into the well and operates against the bottom of the bore while it is rotated. The rolling cutters 9 will disintegrate the hard formation against which they operate and the cutting edges Ii will be held yieldingly against said formation by the spring l2 and will cut away the roughened formation left by the rolling cutters. If the-formation is rock or other very hard material the blade 5 will be permitted to yield so that it will not be so liable to become broken and will normally operate with its edges 6, 6 in about the same working plane as that of the rolling cutters 9. If soft formation is reached the blade Swill be held by the spring with its cutters 6 somewhat in advance of the rolling cutters 9 under which conditions said rolling cutters 9 will be substantially inoperative tom of the bore is concerned.

- The form shown in Figures '1 and a n substantially the same as that shown in Figures 1 tab excepting that the spring Ila is on the outer side of the shank 2a with its upper end resting against an outside shoulder ii on the lower end of the drill collar and with its lower end resting against a relatively thick ring it aroundjthe shank. This ring it rests on the upper ends of the thrust pins l1, l1 which are located in the side grooves it of the head la and with their lower ends anchored to the blade 50.

In the embodiment shown in Figures .1 and 7 the head may be providedwith the vertical, outwardly tapering ribs it, one on each side and the cutters 5, 5a may be provided with the vertical grooves 20 to receive said ribs. These intermeshing parts form side anchoring means to anchor the blade to .the head and yet to permit the vertical movement of the blade relative to the head.

In the form shown in Figure 9 the blade Eb is anchored in fixed relation to' the head lb and consequently the spring l2, or l2a may be dispensed with. In this embodiment the cutting edges 6 are located to operate in approximately the same horizontal plane as the plane of operation of the rolling cutters 9. In other respects the form shown in Figure 9' is substantially the same as that shown in Figure 1.

What I claim is:

l. A drill comprising a head, rotatable abrading means mounted on the forward end of the head, a blade-like cutter mounted on the head between the abrading' means and whose margins have intermeshing, slidable connections with the sides of the head and yieldable means for holding the cutter against the work during the operation of the drill. I

2. A drill comprising a head, rotatable cutters mounted on the forward end of the head, a blade mounted in the head between the rotatable cutters and terminating at its forward end in a cutting edge the sides of the head and the blade being provided, one with vertical grooves and the other with ribs which iit into the grooves and yieldable' means arranged to hold the blade against the work during the operation of the drill.

3. A drillcomprising a head, rotatable cutting means at the forward end of the head, a cutter blade on the head'between the cutting means and terminating at its forward end in cutting edges the blade and head having tenon and mortise connections permitting a sliding movement 0! the blade in the head and yieldable means normally holding the blade in its lower position but permitting said blade to yield upwardly while operating against the formation being drilled.

-4. A drill comprising a headhaving a transverse lower end slot and vertical side ribs, a blade of the fish tail type mounted in said slot, and having grooves to receive the ribs, yieldable means operative against the blade and arranged to permit the blade to yield upwardly during drilling operations and rotatable abrading means mounted on opposite sides of the blade.

5. A drill comprising a head having side ribs, rotatable abrading means and a deb tail cutter mounted at the forward end of the head and adapted to operate against the bottom of a'well bore said cutter having marginal grooves to receive the ribs and means torholding the cutter blade yieldingly against said bottom.

6. A drill comprising a head having a transverselower and "slot and vertical side ribs, av

yield upwardly during drilling operations and rotatable abrading means mounted on opposite sides of the blade.

REUBEN L. waxmrn. a

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2557302 *Dec 12, 1947Jun 19, 1951Maydew Aubrey FCombination drag and rotary drilling bit
US2614810 *Jun 16, 1947Oct 21, 1952Reed Roller Bit CoRotary bit
US2859941 *Feb 6, 1956Nov 11, 1958Carroll Martin BCombination rotary and impact drill
US3066749 *Aug 10, 1959Dec 4, 1962Jersey Prod Res CoCombination drill bit
US3126066 *Dec 5, 1960Mar 24, 1964 Rotary drill bit with wiper blade
US3583503 *Mar 12, 1969Jun 8, 1971Lawrence Mfg CoMounting head assembly
US3674314 *Jan 7, 1970Jul 4, 1972Jarva IncGage scraper
US3765493 *Dec 1, 1971Oct 16, 1973Nielsen IDual bit drilling tool
US4252201 *Aug 27, 1979Feb 24, 1981Dowis James WDrilling method and apparatus
US4386669 *Dec 8, 1980Jun 7, 1983Evans Robert FDrill bit with yielding support and force applying structure for abrasion cutting elements
US4478296 *Dec 14, 1981Oct 23, 1984Richman Jr Charles DDrill bit having multiple drill rod impact members
US6026916 *Aug 1, 1997Feb 22, 2000Briese Industrial Technologies, Inc.Rotary drill arrangement
US6142250 *Apr 24, 1998Nov 7, 2000Camco International (Uk) LimitedRotary drill bit having moveable formation-engaging members
US6298930Aug 26, 1999Oct 9, 2001Baker Hughes IncorporatedDrill bits with controlled cutter loading and depth of cut
US6460631Dec 15, 2000Oct 8, 2002Baker Hughes IncorporatedDrill bits with reduced exposure of cutters
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US6779613Oct 7, 2002Aug 24, 2004Baker Hughes IncorporatedDrill bits with controlled exposure of cutters
US6935441Jun 4, 2004Aug 30, 2005Baker Hughes IncorporatedDrill bits with reduced exposure of cutters
US7096978Aug 30, 2005Aug 29, 2006Baker Hughes IncorporatedDrill bits with reduced exposure of cutters
US7360608Sep 9, 2004Apr 22, 2008Baker Hughes IncorporatedRotary drill bits including at least one substantially helically extending feature and methods of operation
US7814990Aug 21, 2006Oct 19, 2010Baker Hughes IncorporatedDrilling apparatus with reduced exposure of cutters and methods of drilling
US7819208Jul 25, 2008Oct 26, 2010Baker Hughes IncorporatedDynamically stable hybrid drill bit
US7841426Apr 5, 2007Nov 30, 2010Baker Hughes IncorporatedHybrid drill bit with fixed cutters as the sole cutting elements in the axial center of the drill bit
US7845435Apr 2, 2008Dec 7, 2010Baker Hughes IncorporatedHybrid drill bit and method of drilling
US8011275Feb 20, 2008Sep 6, 2011Baker Hughes IncorporatedMethods of designing rotary drill bits including at least one substantially helically extending feature
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US8066084Oct 18, 2010Nov 29, 2011Baker Hughes IncorporatedDrilling apparatus with reduced exposure of cutters and methods of drilling
US8141664Mar 3, 2009Mar 27, 2012Baker Hughes IncorporatedHybrid drill bit with high bearing pin angles
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US8336646Aug 9, 2011Dec 25, 2012Baker Hughes IncorporatedHybrid bit with variable exposure
US8347989Oct 6, 2009Jan 8, 2013Baker Hughes IncorporatedHole opener with hybrid reaming section and method of making
US8356398Feb 2, 2011Jan 22, 2013Baker Hughes IncorporatedModular hybrid drill bit
US8448724Oct 6, 2009May 28, 2013Baker Hughes IncorporatedHole opener with hybrid reaming section
US8448726Feb 2, 2012May 28, 2013Baker Hughes IncorporatedDrill bits with bearing elements for reducing exposure of cutters
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US8471182Dec 31, 2009Jun 25, 2013Baker Hughes IncorporatedMethod and apparatus for automated application of hardfacing material to rolling cutters of hybrid-type earth boring drill bits, hybrid drill bits comprising such hardfaced steel-toothed cutting elements, and methods of use thereof
US8678111Nov 14, 2008Mar 25, 2014Baker Hughes IncorporatedHybrid drill bit and design method
US8752654May 15, 2013Jun 17, 2014Baker Hughes IncorporatedDrill bits with bearing elements for reducing exposure of cutters
US8757297Jun 10, 2013Jun 24, 2014Baker Hughes IncorporatedRotary drill bits including bearing blocks
US8943663Apr 15, 2009Feb 3, 2015Baker Hughes IncorporatedMethods of forming and repairing cutting element pockets in earth-boring tools with depth-of-cut control features, and tools and structures formed by such methods
US8948917Oct 22, 2009Feb 3, 2015Baker Hughes IncorporatedSystems and methods for robotic welding of drill bits
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Classifications
U.S. Classification175/336, 175/381, 175/379
International ClassificationE21B10/14, E21B10/08
Cooperative ClassificationE21B10/14
European ClassificationE21B10/14