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Publication numberUS122514 A
Publication typeGrant
Publication dateJan 9, 1872
Publication numberUS 122514 A, US 122514A, US-A-122514, US122514 A, US122514A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Improvement in rock-drills
US 122514 A
Images(1)
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Description  (OCR text may contain errors)

' MILAN C. BULLOCK.

K Improvement in Rock Drills.

No.4 122,514.` Y Patentedlamwsz.

Rg. 1. y

PATENT OFFICE.

MILAN C. BULLOGK, 0F NEW YORK, N. Y.

IMPROVEMENT IN RQCK-DRILLS.

Specification forming part of Letters Patent No. 122,514, dated January 9, 1872.

invention, reference being had to the accompanying drawing which forms a part of thisl specification, and in which- Figure 1 is a side elevation of my improvement 5 Fig. 2, a vertical section; and Fig. 3, a bottom view thereof. Figs. 4 and 5 are vertical sections of different modifications.

The same parts are denoted bythe same letters in all the figures.

My invention relates to the revolving bit or boring head of a diamon l-drill, and is especially applicable to that class of diamond drillheads which are made solid, so as to excavate a circular hole; although it may also be applied to the annular drill.

111 the solid bit, now commonly in use, the cutting end, on which the diamonds are arranged, is made pointed or conical. The point or apex of the bit is thus not only the point of a wedge which enters the rock, but also the pivot upon which the drill revolves, and is, consequently, subjected to the heaviest crushing strain of any part of the bit, whiie at the same time it has hardly any motion from the revolution of the drill. Thus the center dia- I mond, which is practically a dead-center, and

has the least motion to do the work with, is made to do the hardest part of the Work. My invention is designed to remedy this defect; consists in making the end of the bit concave instead of convex.

t A, in the drawing, represents the bit or borlng head of a diamond-drill, upon Whose reentrant conical surface, shown in section in Fig. 2, are arranged the diamonds B B. The consequence of this construction is, that the Work of penetration is entirely performed by the outer or clearance diamonds, which, being set in the periphery of the bit, have the greatest amount of motion to do the work with, while the inside cone has only to cut away the core of' rock, the amount of work required of each diamond being proportional to its amount of motion, and the center diamond having only to crumble oft' the apex of the core, instead of forcing an entrance into the rock. C is a small central hole communicating with the hollow drill-rod for the purpose of supplying water to lubricate the bit and wash out the detritus. Other holes, D D, may also be made in the bit for the same purpose.

Figs. 4 and 5 show different modes of constructin g my improved bit in sections. The rings E E are slipped one inside of another, and by replacing one or more of them with rings of diiierent width or thickness, the inside angle ofthe bit may be made sharper or more obtuse, as may be desired, for diii'erent kinds of rock. This construction is also advantageous if a diamond should break, as in. such case the ring on which the broken diamond is may be at once replaced.

I have described this invention as applied only to a solid bit; but it is also useful when applied to an annular one, although not in the same degree.

What I claim as new, and desire to secure by Letters Patent of the United States, is-

The above-described concave diamond bit or boring-head.

M. C. BULLOCK.

Witnesses:

SAM. E. GRIsooM Tnos. A. BURTT. (124)

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2557302 *Dec 12, 1947Jun 19, 1951Maydew Aubrey FCombination drag and rotary drilling bit
US2812626 *Jun 6, 1955Nov 12, 1957Bisterfeld & StoltingGrinding tools for working materials of great strength and hardness
US2980098 *Jul 11, 1958Apr 18, 1961Ty Sa Man Machine CompanyGrinding wheels
US3127944 *Sep 4, 1959Apr 7, 1964Davis Frank FDrilling saw
US4574895 *Dec 29, 1983Mar 11, 1986Hughes Tool Company - UsaEarth boring bit
US4845896 *Feb 24, 1987Jul 11, 1989Failure Analysis AssociatesSurface sampling device
US4856233 *Oct 17, 1988Aug 15, 1989Failure Analysis Associates, Inc.Method for sampling a workpiece
US7073598Jul 23, 2003Jul 11, 2006Weatherford/Lamb, Inc.Apparatus and methods for tubular makeup interlock
US7083005May 31, 2005Aug 1, 2006Weatherford/Lamb, Inc.Apparatus and method of drilling with casing
US7090021Mar 16, 2004Aug 15, 2006Bernd-Georg PietrasApparatus for connecting tublars using a top drive
US7090023May 9, 2005Aug 15, 2006Weatherford/Lamb, Inc.Apparatus and methods for drilling with casing
US7093675Aug 1, 2001Aug 22, 2006Weatherford/Lamb, Inc.Drilling method
US7100710Dec 18, 2003Sep 5, 2006Weatherford/Lamb, Inc.Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7108084Dec 24, 2003Sep 19, 2006Weatherford/Lamb, Inc.Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7117957May 25, 2004Oct 10, 2006Weatherford/Lamb, Inc.Methods for drilling and lining a wellbore
US7128154Jan 29, 2004Oct 31, 2006Weatherford/Lamb, Inc.Single-direction cementing plug
US7128161Sep 20, 2005Oct 31, 2006Weatherford/Lamb, Inc.Apparatus and methods for facilitating the connection of tubulars using a top drive
US7131505 *Feb 22, 2005Nov 7, 2006Weatherford/Lamb, Inc.Drilling with concentric strings of casing
US7137454May 13, 2005Nov 21, 2006Weatherford/Lamb, Inc.Apparatus for facilitating the connection of tubulars using a top drive
US7140445Mar 5, 2004Nov 28, 2006Weatherford/Lamb, Inc.Method and apparatus for drilling with casing
US7147068Dec 5, 2003Dec 12, 2006Weatherford / Lamb, Inc.Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7165634Oct 2, 2003Jan 23, 2007Weatherford/Lamb, Inc.Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7188687Jul 27, 2004Mar 13, 2007Weatherford/Lamb, Inc.Downhole filter
US7191840Mar 5, 2004Mar 20, 2007Weatherford/Lamb, Inc.Casing running and drilling system
US7213656Apr 26, 2004May 8, 2007Weatherford/Lamb, Inc.Apparatus and method for facilitating the connection of tubulars using a top drive
US7216727Dec 21, 2000May 15, 2007Weatherford/Lamb, Inc.Drilling bit for drilling while running casing
US7219744Nov 29, 2005May 22, 2007Weatherford/Lamb, Inc.Method and apparatus for connecting tubulars using a top drive
US7228901Dec 1, 2005Jun 12, 2007Weatherford/Lamb, Inc.Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7234542Feb 9, 2006Jun 26, 2007Weatherford/Lamb, Inc.Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
US7264067Oct 1, 2004Sep 4, 2007Weatherford/Lamb, Inc.Method of drilling and completing multiple wellbores inside a single caisson
US7284617May 20, 2004Oct 23, 2007Weatherford/Lamb, Inc.Casing running head
US7303022Apr 27, 2004Dec 4, 2007Weatherford/Lamb, Inc.Wired casing
US7311148Feb 9, 2004Dec 25, 2007Weatherford/Lamb, Inc.Methods and apparatus for wellbore construction and completion
US7325610Mar 5, 2004Feb 5, 2008Weatherford/Lamb, Inc.Methods and apparatus for handling and drilling with tubulars or casing
US7334650Feb 2, 2004Feb 26, 2008Weatherford/Lamb, Inc.Apparatus and methods for drilling a wellbore using casing
US7360594Mar 5, 2004Apr 22, 2008Weatherford/Lamb, Inc.Drilling with casing latch
US7370707Apr 5, 2004May 13, 2008Weatherford/Lamb, Inc.Method and apparatus for handling wellbore tubulars
US7413020Mar 5, 2004Aug 19, 2008Weatherford/Lamb, Inc.Full bore lined wellbores
US7503397Jul 29, 2005Mar 17, 2009Weatherford/Lamb, Inc.Apparatus and methods of setting and retrieving casing with drilling latch and bottom hole assembly
US7509722Mar 5, 2003Mar 31, 2009Weatherford/Lamb, Inc.Positioning and spinning device
US7617866Sep 8, 2005Nov 17, 2009Weatherford/Lamb, Inc.Methods and apparatus for connecting tubulars using a top drive
US7650944Jul 11, 2003Jan 26, 2010Weatherford/Lamb, Inc.Vessel for well intervention
US7712523Mar 14, 2003May 11, 2010Weatherford/Lamb, Inc.Top drive casing system
US7730965Jan 30, 2006Jun 8, 2010Weatherford/Lamb, Inc.Retractable joint and cementing shoe for use in completing a wellbore
US7823665Aug 7, 2007Nov 2, 2010Weatherford/Lamb, Inc.Milling of cemented tubulars
US7857052May 11, 2007Dec 28, 2010Weatherford/Lamb, Inc.Stage cementing methods used in casing while drilling
US7938201Feb 28, 2006May 10, 2011Weatherford/Lamb, Inc.Deep water drilling with casing
US8276689May 18, 2007Oct 2, 2012Weatherford/Lamb, Inc.Methods and apparatus for drilling with casing
US8511405Apr 30, 2010Aug 20, 2013Ryan Clint FrazierDrill bit with tiered cutters
USRE42877Jul 9, 2010Nov 1, 2011Weatherford/Lamb, Inc.Methods and apparatus for wellbore construction and completion
WO1988006722A1 *Feb 16, 1988Sep 7, 1988Failure Analysis AssSurface sampling device
Classifications
Cooperative ClassificationY10S76/12, E21B10/48