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Publication numberUS2297157 A
Publication typeGrant
Publication dateSep 29, 1942
Filing dateNov 16, 1940
Priority dateNov 16, 1940
Publication numberUS 2297157 A, US 2297157A, US-A-2297157, US2297157 A, US2297157A
InventorsJohn Mcclinton
Original AssigneeJohn Mcclinton
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Drill
US 2297157 A
Images(2)
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Description  (OCR text may contain errors)

J. MccLlNToN sept. 29,v 1942.

' DRILL FiledNov. 16, 1940 Y 2 Sheets-Sheet l NVENTOR C/mzn.

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SePf- 29, 1942- J. MocLlN-roN DRILL Filed Nov. 16, 1

Patented Sept. 29, 1942 UNITED STATES FATENT OFFICE DRILL l John McClinton, Houston, Tex.

Application November 16, 1940, Serial No. 365,909

(Cl. Z55-61) 2 Claims.

This invention relates to a drill.

An object of the invention is to provide a drill specially designed for use in deep well drilling and which may be used in either soft or hard formation.

It is a further object of the invention to provide a drill of the character described embodying novel means for operating both against the bottom of the bore as well as against the side wall of the bore with guide means on the drill head for holding the cutting means positively and rmly against the work.

Another object of the invention is to provide a drill of the character described having a head and cutting means and guide means thereon so related as to cause the drill to follow a straight course so as to prevent deflection of the bore.

With the above and other objects in View .the

invention has particular relation to certain novel features of construction, arrangement of parts and use, an example of which is given in this specication and illustrated in the accompanying drawings, wherein:

Figure 1 shows a side View of the drill.

Figure 2 shows a cross-sectional view taken on the line 2-2 of Figure 1.

Figure 3 shows a cross-sectional View taken on the line 3 3 of Figure 1.

Figure 4 shows a fragmentary view of the drill taken on the line 4-4 of Figure 5.

Figure 5 shows a longitudinal, sectional View of the drill.

Figure 6 shows a side view taken at right angles to the View shown in Figure 1.

Figure '7 shows a bottom end view, and

Figure 8 shows a cross-sectional View taken on the line 8--8 of Figure 5.

Referring now more particularly to the drawings wherein like numerals of reference designate the same parts in each of the gures, the nui meral I designates the drill head which is, preferably, cylindrical in shape and whose upper end is internally threaded to receive the externally threaded pin member of .the drill stem 2. The

lower end of the head is approximately of an in- J verted, conical shape as shown in Figure 6. At one side the head has a vertical, dove-tailed groove 3 extending from the lower end thereof upwardly and terminating at the shoulder 4. A dove-tailed shank 5 is fitted upwardly into said groove and may be secured therein by bolts as 6 and may be also welded in place, if desired, by the weld l.

The lower end of the shank diverges downwardly relative to the axis of the head forming an anchor 8. The outer end of the anchor is beveled presenting a vertical, outside face 9 and the inner side of the anchor presents the bearing face I0. Extending inwardly at approximately right angles to the bearing Ill of the anchor there is a spindle I I preferably formed integrally with said anchor and on which is mounted to rotate a irusto-conical shaped rolling cutter I2 whose outer surface is suitably toothed to penetrate the formation as shown. The rolling cutter I2 is mounted to rotate about the spindle on suitable roller bearings I3. Its outer, or large, end presents an annular bearing face I4 which bears against the face I ll and its inner end is conical in form. If desired, a gasket I6 may be fitted around the spindle II and countersunk into the corresponding end of the rolling cutter I2.

Above the upper end of the shank 5 and preferably aligned therewith and formed integrally with the head there is a side reaming cutter I 'I terminating in a forwardly directed sharp reaming edge I8. It will be noted from an inspection 'of Figures 1 and 8 that surrounding the annular face I4 of the rolling cutter I2 there is an annular series of cutting teeth I9 on said rolling cutter and it will be noted from an inspection of Figure 5 that these teeth I9 operate against the side wall of the bore at the bottom of the bore while the other, or surface teeth of the rolling cutter I2 operate directly on the bottom of the bore as the drill rotates.

Opposite the rolling cutter I2 there is a cutting blade 20 secured on the lower end of the head. This cutting blade terminates in a forwardly directed cutting edge 2I to operate on the bottom of the bore as illustrated in Figures 5 and 6. This blade 2l) is preferably welded to the lower end of the head by the weld 22.

As the drill rotates the rolling cutter I2 will penetrate into and disintegrate the formation at the bottom of the bore and the blade-like cutter will follow the rolling cutter and remove the disintegrated material ahead of it, which material will be carried from the well by the circulating drilling iluid in the well known manner. This drilling fluid is circulated downwardly through the drill stem and through the drill head and is discharged out onto the cutters through the channels 23, 24 through the head and is returned up through the bore outside of the drill stem.

Formed integrally with the head and arranged opposite the reaming cutter II there is a guide, or stabilizer, 25 which extends longitudinally of the head and extends out radially to the outer side of the cutter 20. This is more clearly shown in Figures 1, 2 and 8. The outer side of the guide, or stabilizer, is curved to approximately the curvature of the bore and rides against the wall of the bore to hold the reaming blade l1 and the rolling cutter l2 rmly against the opposite side of the bore so that they will effectively operate against the side as well as against the bottom of the bore. This tends to hold the drill steady and to cause it to follow a straight course thus preventing the formation of a deflected or crooked bore.

The arrangement of the rolling cutter and the blade-like cutter at the bottom of the drill makes provision for a drill of this type which will very effectively penetrate soft as Well as hard formations.

The drawings and description are illustrative merely and are not intended to restrict the invention except as the same may be dened by the appended claims.

What I claim is:

1. A drill for forming an earth bore comprising a head, an anchor depending from the head at one side having a downwardly and outwardly inclined bearing face, a frusto-conical rolling cutter mounted on the anchor to bear against said face and to rotate on an axis perpendicular to said face and having peripheral teeth thereon to engage the bottom of the bore and outer end teeth to engage the side Wall of the bore, a cutter blade on the head positioned substantially opposite the rolling cutter and adapted to cut the material at the bottom of the bore disintegrated by the rolling cutter, a stabilizing guide on the head and in approximate alignment with the cutter blade and a reamer on the head in approximate alignment with the rolling cutter and disposed approximately opposite the guide and having a forwardly directed reaming edge.

2. A drill for forming an earth bore comprising a head, an anchor depending from the head at one side having a downwardly and outwardly inclined bearing face, a frusto-conical rolling cutter mounted on the anchor to bear against said face and to rotate on an axis perpendicular to said face and having teeth thereon to engage the bottom of the bore as the cutter rotates, a cutter blade on the head positioned substantially opposite the rolling cutter and adapted to cut the material at the bottom of the bore disintegrated by the rolling cutter, a stabilizing guide on the head and in approximate alignment with the cutter blade and a reamer on the head in approximate alignment with the rolling cutter and arranged opposite the guide.

JOHN MCCLINTON.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2614810 *Jun 16, 1947Oct 21, 1952Reed Roller Bit CoRotary bit
US3126066 *Dec 5, 1960Mar 24, 1964 Rotary drill bit with wiper blade
US3159223 *Dec 30, 1960Dec 1, 1964Atlantic Refining CoUnderdrilling roller bit
US4527644 *Mar 25, 1983Jul 9, 1985Allam Farouk MDrilling bit
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
US8047307Dec 19, 2008Nov 1, 2011Baker Hughes IncorporatedHybrid drill bit with secondary backup cutters positioned with high side rake angles
US8056651Apr 28, 2009Nov 15, 2011Baker Hughes IncorporatedAdaptive control concept for hybrid PDC/roller cone bits
US8141664 *Mar 3, 2009Mar 27, 2012Baker Hughes IncorporatedHybrid drill bit with high bearing pin angles
US8157026Jun 18, 2009Apr 17, 2012Baker Hughes IncorporatedHybrid bit with variable exposure
US8191635Oct 6, 2009Jun 5, 2012Baker Hughes IncorporatedHole opener with hybrid reaming section
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
US8450637Oct 23, 2008May 28, 2013Baker Hughes IncorporatedApparatus for automated application of hardfacing material to drill bits
US8459378May 13, 2009Jun 11, 2013Baker Hughes IncorporatedHybrid drill bit
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
EP2310612A2 *May 1, 2009Apr 20, 2011Baker Hughes IncorporatedModular hybrid drill bit
WO2008124572A1 *Apr 4, 2008Oct 16, 2008Baker Hugues IncHybrid drill bit and method of drilling
WO2009135119A2May 1, 2009Nov 5, 2009Baker Hughes IncorporatedModular hybrid drill bit
WO2013169819A1 *May 7, 2013Nov 14, 2013Ulterra Drilling Technologies, L.P.Fixed cutter drill bit with rotating cutter disc
Classifications
U.S. Classification175/336, 175/376, 175/367, 175/375
International ClassificationE21B10/08, E21B10/14
Cooperative ClassificationE21B10/14
European ClassificationE21B10/14