US1547459A - Drill - Google Patents

Drill Download PDF

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Publication number
US1547459A
US1547459A US682159A US68215923A US1547459A US 1547459 A US1547459 A US 1547459A US 682159 A US682159 A US 682159A US 68215923 A US68215923 A US 68215923A US 1547459 A US1547459 A US 1547459A
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United States
Prior art keywords
drill
cutters
discs
bit
mandrel
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US682159A
Inventor
George A Stafford
Alexander S Hudson
Original Assignee
George A Stafford
Alexander S Hudson
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Publication date
Application filed by George A Stafford, Alexander S Hudson filed Critical George A Stafford
Priority to US682159A priority Critical patent/US1547459A/en
Application granted granted Critical
Publication of US1547459A publication Critical patent/US1547459A/en
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Application status is Expired - Lifetime legal-status Critical

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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/62Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/003Drill bits with cutting edges facing in opposite axial directions
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/26Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/46Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/58Chisel type inserts

Description

July 2 1925 1,547,459

' G. A. STAFFORD ET AL DRILL Filed Dec. 22. 926 2 Sheets-Sheet l 'MMW July 28, 1925. 1,547,459

- G. A. STAFFORD ET AL DRILL Filed Dec. 22. 1925 2 Sheets-Sheet 2 v a glvvvemtg'u' Patented July 28, i925.

1,547,459 PATEN oFFlcagf;

- GEORGE A. sTArroRn AND ALEXANDER s. nonson, or soon LAKE-TEXAS.

' Dem.

Application flled- December and ALEXANDER S. HUDsoN, citizens of the;

United States, residing at Sour Lake, in the county of Hardin and State of Texas, have invented certain new and useful Improvements in a Drill, of which the following is a specification. I

This invention relates to new and useful improvements in adrill.

()ne object of the invention is to provide a drill specially designed for use in drilling through rock and shale in theprocess of drilling wells, but which is also capable of use for general drilling purposes.

Another object of the invention is to provide a drill 6f the" character described which, bythe variation in size, of certain parts, may be used for drilling holes of various diameters.

A further feature of the inventionis to provide a drill of the character described whose worn parts may be readily replaced andthe bit, as a whole thereby renewed.

A still further feature of the invention is to provide'a' drill of the character described which is of very sturdy construction, which may be produced cheaply and which, when dull, or worn, may be renewed.

With the above and other objects in view, this invention has particular relation to cer tain novel'features of construction, operation, and arrangement of parts, an example of which isgiven in this specification and illustrated'in the accompanying drawings, wherein Figure 1 shows a side view partly in section. g

Figure 2 shows a point view thereof." Figure 3 shows a plan view.

Fi' re 4 shows a cross sectional view the line 44 of Figure 1; and,

Figure 5 shows a fra entary side view, partly in section, showing a point of the sh tail type.

Referring now more'particularly to the drawings, wherein like "numerals. of reference designate similar parts in each of the figures, the numeral 1 designates the bit shank whose up er end is reduced and'outcheaply and easily of the bit,

wardly threade to receive the drill collar 2. Beneath the reduced portion, the shank flares downwardly, as" at 2', and is toothed so that if the drill becomes stuck in the bore 22, 1923. Serial No. 682,159.

by bowlders or the like, falling in upon it,

it can cut itself outand thus be withdrawn. 1 Beneath the flared portion there is an integral central downward extension, or mandrel 3, square in cross section, andwhose lower end is round and externally threaded, as at 4, to receive a point, or pilot bit as 5 or 5. Fitted onto the mandrel and interposed between the pilot bit and the enlarged part of the shank, there is a plurality of relatively thick discs 6 forming the body of the drill. This body, as a whole, converges, or tapers downwardly, as shown. Glam ed between the discs, and also between the p1lot bit and the enlarged shank, and the respective adjacent discs are the radiating cutters 7, which are fitted into; suitable seats provided for them, and into which their inner ends fit. t

Each cutter has two or more vertical key ways, as '8, and the wall of the corres onding seat has a similar key way 9, and

keyways 8 to lock the cutters against detachment, all of which is shown in the drawings. Each key is elongated and one end thereof is fitted into a seat, as 10, provided for it in the adjacent part of the drill, as shown in Figures 1 and 5. The two keywa s in the cutters 7, provide'means for the ad ustment of the cutters out or in, so that asthey become worn ofi' they may be ad justed outwardly. The outer ends of these cutters, as well as" their lower sides are beveled, so as to present sharp cutting edges to the material to be cut away. There is a water course 11 extending down through the keys are seated in the keyways 9 and one of the grooves 13, around the drill from 'its'lower to its upper end. The; pilot bit 5 is ofa-- general inverted conical contour and its surface is toothed as shown 1n Flgures 1 and 2. To itslower end there are secured the radiating cutters 14. In the form shown in Figure'5, the pilot bit is of theform of the usual fish tail bit. g

. It is obvious that certain mechanical chan es maybe made in the construction of this grillwithout departin from the principle of the invention an we hereby reserve the right to make such mechanical changes, as will not depart from the scope of the appended claims.

What we claim is: I

1. A drill bit comprising a reduced outwardly threaded shank, an annular downwardly flared shoulder adjacent to said shank having peripheral teeth, a mandrel polygonal in cross section below said shoulder, discs secured on said mandrel, ad'ustable cutters clamped between said isc's, means for securing said cutters against detachment, said cutters being arranged spifor securing said cutters in said discs, and. a bit secured upon the end of said mandrel. 3. A drill bit including an outwardly threaded shank ada ted to receive a drill stem collar, a flare portion beneath said shank provided with peripheral teeth, an ining a threaded lower endaa plurality of discs fitted over said'f-mandrel, said discs.

having a downwardlyconverging contour, cutters clamped between said discs, said cutters being radially adjustable, means for securing said cutters in position between the discs, and a pilot bit having threaded connection with the threaded end of said mandrel.

'wardl flared portion beneath ,Said shank provi' ed with peripheral teeth, a central mandrel beneath said flared portion, a plurality of discs adapted to. be inserted over. .saidmandrel, said discs forming a downwardly converging frusto-conical shaped body, said body having a spiralled peripheral groove, radially adjustable cutters ar- 4. 'A 'drill bit including a shank an outtegral downwardlyextending mandrel hav- I i ranged between the discs, means for securing'said cutters in position and the pilot bit secured on the lower end of the mandrel.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses. j

GEORGE-A. STAFFORD. l ALEXANDER s. HUDSON.

" Witnesses:

S. WILLIAMS, E. E. STRANGE.

US682159A 1923-12-22 1923-12-22 Drill Expired - Lifetime US1547459A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2553701A (en) * 1949-09-16 1951-05-22 Willard F Comstock Well drilling bit
US2558341A (en) * 1949-03-11 1951-06-26 Cory Frank Lawrence Auger rock drill bit
US2607562A (en) * 1951-03-19 1952-08-19 Phipps Orville Self-piloted rotary drill bit
US3710879A (en) * 1970-07-24 1973-01-16 D Dewar Drilling apparatus
US4135588A (en) * 1977-11-21 1979-01-23 Schreves, Inc. Boring and compacting tool
EP0030558A1 (en) * 1979-06-19 1981-06-24 Syndrill Carbide Diamond Company Deep hole rock drill bit
FR2587630A1 (en) * 1985-09-20 1987-03-27 Bourlier Manutention Disintegrator tool
US6123160A (en) * 1997-04-02 2000-09-26 Baker Hughes Incorporated Drill bit with gage definition region
US6206117B1 (en) 1997-04-02 2001-03-27 Baker Hughes Incorporated Drilling structure with non-axial gage
US20070251727A1 (en) * 2004-06-08 2007-11-01 Devall Donald L Reamer bit
US20110240367A1 (en) * 2009-10-01 2011-10-06 Baker Hughes Incorporated Milling Tool for Establishing Openings in Wellbore Obstructions

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2558341A (en) * 1949-03-11 1951-06-26 Cory Frank Lawrence Auger rock drill bit
US2553701A (en) * 1949-09-16 1951-05-22 Willard F Comstock Well drilling bit
US2607562A (en) * 1951-03-19 1952-08-19 Phipps Orville Self-piloted rotary drill bit
US3710879A (en) * 1970-07-24 1973-01-16 D Dewar Drilling apparatus
US4135588A (en) * 1977-11-21 1979-01-23 Schreves, Inc. Boring and compacting tool
EP0030558A4 (en) * 1979-06-19 1981-10-27 Syndrill Carbide Diamond Compa Deep hole rock drill bit.
EP0030558A1 (en) * 1979-06-19 1981-06-24 Syndrill Carbide Diamond Company Deep hole rock drill bit
FR2587630A1 (en) * 1985-09-20 1987-03-27 Bourlier Manutention Disintegrator tool
EP0869256A3 (en) * 1997-04-02 2002-04-17 Baker Hughes Incorporated Rotary drill bit with gage definition region, method of manufacturing such a drill bit and method of drilling a subterranean formation
US6206117B1 (en) 1997-04-02 2001-03-27 Baker Hughes Incorporated Drilling structure with non-axial gage
US6123160A (en) * 1997-04-02 2000-09-26 Baker Hughes Incorporated Drill bit with gage definition region
US20070251727A1 (en) * 2004-06-08 2007-11-01 Devall Donald L Reamer bit
US7513319B2 (en) * 2004-06-08 2009-04-07 Devall Donald L Reamer bit
US20110240367A1 (en) * 2009-10-01 2011-10-06 Baker Hughes Incorporated Milling Tool for Establishing Openings in Wellbore Obstructions
US8499834B2 (en) * 2009-10-01 2013-08-06 Baker Hughes Incorporated Milling tool for establishing openings in wellbore obstructions
NO341083B1 (en) * 2009-10-01 2017-08-21 Baker Hughes Inc Milling tools and method for milling a hole in an obstruction within a pipe and a system for forming a hole in an underground obstruction

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