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Publication numberUS2326908 A
Publication typeGrant
Publication date17 Aug 1943
Filing date29 May 1942
Priority date29 May 1942
Publication numberUS 2326908 A, US 2326908A, US-A-2326908, US2326908 A, US2326908A
InventorsWilliams Jr Edward B
Original AssigneeWilliams Jr Edward B
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Drill bit
US 2326908 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

1943- E. B. WILLIAMS, JR I v 2,326,908

DRILL BIT Filed May 29, 1942 INVENTOR.

Edward. BM illiamsJr. I

Patented Aug. 17, 1943 UNITED STATES PATENT OFFICE DRILL BIT Edward B. Williams, Jr., Greenville, Tex. Application May 29, 1942, Serial No. 444,955 3 Claims. (01. 255-72) This invention relates to well drilling tools and particularly to drill bits and in such connection it has more specific reference to the novel construction and arrangement thereof.

The primary object of the invention is to provide a drill bit-constructed in sections or segments so that the cutting parts of the bit may be removed and repairs made in the field when required. 7

Another object of the invention is the provisionof a drill bit constructed of a plurality of removable segments and wherein the segments are interlocked one with another and are interchangeable.

The invention also includes such features as novel means for securing the segments to a drill head, and the elimination of reaming, all of which I will'b'e clearly understood from a perusal of the following-detailed description, taken in connection with the accompanying drawing, and in the drawing:

Figure 1 is a side view of a drill head, partly broken'away and partly in section, and illustrating an embodiment of the segment bit;

Figure 2 is a top plan view thereof; the view being partly broken away;

Figure 3 is a rspective view of one of the segments showing the bottom thereof;

Figure 4 is a View similar to Figure 3, but showing the upper portion of the segment; and

' Figure 5 is a top plan view of one of thesegments, the broken lines indicating the means for securing the segments in position.

Having a more detailed reference to the drawing, i denotes a drill head with threaded portion 2 for connecting the head to a drill body. Formed on andfspaced around the head I are a plurality of ta red keys 3 for receiving and holding theme the segments for cutting. The segments show, at 4 in the several views of the drawing carry the abrasives such as diamonds of various grades, size and types, or steel alloys cast in the segments and indicated at A. The primary object of .the invention resides in the adaptability of the bit to be repaired in the field thus saving time, labor and cost. Toward this objective and as illustrated in the drawing each of the segments 4 has a recess 5 which conforms to the tapered form of the keys 3, and the keys 3 are bored at 3-11 to receive screw bolts or pins 6. This formgof construction and arrangement of the keys and segments provides a practical and effective means for holding the segments in position as the more pressure is, had on the segments the tighter the same are held on the keys.

This also prevents the segments from becoming dislodged or dropping off the keys when the drill Another important and particular feature of the drill bit is the manner of interlocking each segment with its adjacent segment. a For this purpose each segment has a tongue or projecting portion 1 and its opposite end is forked or has the projecting spaced parts 8. These parts thus interlock, the tonguesfitting snugly in between the parts 8 as shown in Figure 2 and which prevents drill fiuid from flowing in between the parts. ,7

From the foregoing it will be apparent that the drill core bit with its removable, interchangeable and interlocking segments and the manner of mounting and removing them provides a practical and useful bit of this nature. After drilling there is no reaming necessary as the hole will be cut full gauge, as, due to the segments being circular in form, in drilling the bit will slightly increase the diameter of the hole, and at the same time drill a perfectly circular hole. In case one portion of the bit becomes worn, the worn part can be removed and replaced with reinforced segments on the site, thus saving the usefulness and value in the unworn parts and thus cutting down cost of bits and drilling costs. The abrasives can thus also be removed and replaced with other segments, or adjusted on the site to meet'any drilling contingency arising in cutting the formations.

While the disclosure presents a practical working embodiment of a drill core bit embracing the features and advantages pointed out, it will be understood that the invention is not limited to the precise construction here shown, but is capable of some modifications and alterations in keeping with the inventive thought, and such as would be within the scope and meaning of the I following claims.

What is claimed is:

1. A drill core bit comprisinga hollow cylindrical head with a plurality of projecting tapered and arcuate keys spaced apart on one end of the head, a plurality of segments of arcuate form, each of which has a recess for complementally receiving the keys, each of the segments including tongue and groove means for connecting and interlocking the segments in a continuous rim on the head, the outer faces of the segments carrying abrasive elements.

2. A drill core bit comprising a hollow cylindrical head, one end of the head being threaded tongue of substantially wedge shape on one end thereof and a forked formation on its opposite end, the tongue and the forked formation projecting beyond the abrasive-holding portion of the segment, the tongue being complementally receivable in between the forked formation to thereby interlock the segments in position on the'head and upon the projections, and means for securing the segments in said interlocked po- 10 sition on the head.

EDWARD B. WILLIAMS, JR.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2428823 *18 May 194314 Oct 1947Thomas P CampbellMethod of producing drill bits
US2506341 *28 Oct 19482 May 1950Koebel Diamond Tool CoCore bit
US2506387 *20 Oct 19482 May 1950Koebel Diamond Tool CoCore bit
US2506388 *20 Oct 19482 May 1950Koebel Diamond Tool CoCore bit
US2671642 *12 Nov 19489 Mar 1954Reed Roller Bit CoCoring apparatus
US2780896 *14 Mar 195512 Feb 1957Jaye CorpApparatus for cutting pipe cover sections from cellular material
US2946567 *11 Aug 195826 Jul 1960Pepper Robert KCasing installing machine
US3306380 *27 Jan 196428 Feb 1967Gen Automation Mfg IncCore drill
US3382940 *21 Oct 196514 May 1968Frank E. StebleyPercussion drill bit
US4208154 *21 Mar 197817 Jun 1980Gundy William PCore drill
US4261620 *30 Oct 197914 Apr 1981Carmet CompanyTapered lock pin for a cutter tool bit
US4466498 *24 Sep 198221 Aug 1984Bardwell Allen EDetachable shoe plates for large diameter drill bits
US4765333 *13 Jun 198423 Aug 1988Bray Robert SSurgical methods and apparatus for bone removal
US4895146 *29 Dec 198823 Jan 1990Klaus DraenertSurgical bone-grinding instrument
US624103616 Sep 19985 Jun 2001Baker Hughes IncorporatedReinforced abrasive-impregnated cutting elements, drill bits including same
US64584717 Dec 20001 Oct 2002Baker Hughes IncorporatedReinforced abrasive-impregnated cutting elements, drill bits including same and methods
US674261130 May 20001 Jun 2004Baker Hughes IncorporatedLaminated and composite impregnated cutting structures for drill bits
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US8191445 *24 Nov 20085 Jun 2012Longyear Tm, Inc.Methods of forming fiber-containing diamond-impregnated cutting tools
US859064617 Sep 201026 Nov 2013Longyear Tm, Inc.Impregnated cutting elements with large abrasive cutting media and methods of making and using the same
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US8684111 *15 Jun 20091 Apr 2014Sandvik Intellectual Property AbCore drill bit
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US878338422 May 201222 Jul 2014Longyear Tm, Inc.Fiber-containing diamond-impregnated cutting tools and methods of forming and using same
US926733224 Aug 201123 Feb 2016Longyear Tm, Inc.Impregnated drilling tools including elongated structures
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US954088328 Mar 201410 Jan 2017Longyear Tm, Inc.Fiber-containing diamond-impregnated cutting tools and methods of forming and using same
US968791621 Dec 201227 Jun 2017Hilti AktiengesellschaftDrill bit with an exchangeable cutting portion
US20050105981 *21 Sep 200419 May 2005The M. K. Morse CompanyHole cutter and method for producing
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US20090071724 *24 Nov 200819 Mar 2009Longyear Tm, Inc.Drilling systems including fiber-containing diamond-impregnated cutting tools
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US20110174546 *15 Jun 200921 Jul 2011Sandvik Intellectual Property AbCore drill bit
US20170001249 *17 Dec 20145 Jan 2017Hilti AktiengesellschaftDrill bit with a replaceable cutting portion
EP0352546A2 *12 Jul 198931 Jan 1990HILTI AktiengesellschaftCore drill bit
EP0352546A3 *12 Jul 198913 Mar 1991HILTI AktiengesellschaftCore drill bit
WO2000015942A1 *15 Sep 199923 Mar 2000Baker Hughes IncorporatedReinforced abrasive-impregnated cutting elements, drill bits including same and methods
WO2013093041A1 *21 Dec 201227 Jun 2013Hilti AktiengesellschaftDrill bit with an exchangeable cutting portion
Classifications
U.S. Classification175/405.1, 125/20, 408/204, 175/412, 408/145, 408/226, 125/39
International ClassificationE21B10/46, E21B10/48
Cooperative ClassificationE21B10/48
European ClassificationE21B10/48