US2027700A - Drill cutter - Google Patents

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US2027700A
US2027700A US704686A US70468633A US2027700A US 2027700 A US2027700 A US 2027700A US 704686 A US704686 A US 704686A US 70468633 A US70468633 A US 70468633A US 2027700 A US2027700 A US 2027700A
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teeth
cutting
edged
sharp
cutters
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US704686A
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Rogatz Henry
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Phillips Petroleum Co
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Phillips Petroleum Co
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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
    • E21B10/08Roller bits
    • E21B10/16Roller bits characterised by tooth form or arrangement

Definitions

  • This invention relates to an improved type of having alternating flat edged and sharp edged cutters for roller boring drills. teeth. It has often been found that in drilling wells, F gu 2 is a portional d View Of the cutter particularly oil and gas wells, many hard formashown in Figure 1 and ow the longitudinal tions are encountered, such as granite wash and w of fiat d d t et alternating w the similar hard formations.
  • hard formation bits are usually used to iIlg tapered Sidesdrill through hard formations; particularly u e 3 is a ec n p V Of a Cl! granite wash, which consists of individual grains having all fl edged teeth w tapering id or fragments of granite imbedded in a solid for- Figure 4 is a Sectional p View Of a cutter 10 mation which is not so hard as granite.
  • Figure 5 is a portional SideVieW Of a cutter and to some extent a crushing, effect upon the having all flat edged teeth with tapering sides. formation at the bearing surface of the bit.
  • Fi ure 6 is a portional side view of a cutter I have discovered that cutters, having flat- Showing circumferential rows of flat edged tened teeth, provide a more efli ieni; crushing teeth alternating with circumferential rows of action than cutters having sharpened or wedge Sharp edged teeth, all having tapering Sidesshaped teeth.
  • Figure 7 is'a sectional top view of a cutter 20 Advantages of this invention over drill cuthaving alternating flat edged and Sharp d d ters of the conventional type are, longer life for teeth with tapering drill bits, faster drilling, fewer replacements and Figure 3 is a Portiona1 side View of the cutter changes, more sturdy construction with less shown in Figure Showing the flat edged teeth breaking of teeth and savings in time ordinarily alternating diagonally with the, sharp edged 25 consumed in taking outobits 130,138 rebuilt.
  • the alternating type of cutters would be 2 5 5: @5 5: i s: $2 1; ggg t itfi ifioilgitfi I partimlarlyv wen adapted for use in arming dinal rows alternating with sharp edged teeth through a solid hard formation, the knife edged in longitudinal rows
  • the cutter shown in Wedge Shaped teeth functionmingim cut ure 4 and Figure 6 shows fiat edged teeth A in break up the formation andflthe blunt flat edged circumferential rows alternating with sharp tfi ttetirttt tiifutitilttfittvt edged teeth B 5 gg g g g g g+ n ta 1" sies.
  • v p Figure 1 is a Sectional top view f a cutter
  • the drill bit is utilized, as shown in Figure 9 of the drawings, which is a conventional type of rotary drill bit.
  • cutters as shown in Figure 3 and Figure 5 on which are mounted flat edged teeth A, are attached to the bit in the conventional manner. I have found that drilling, through this type of formation is greatly expedited by an action which crushes the hard granite surfaces rather than by an action which attempts to out such hard surfaces, since it has been found heretofore that cutters having sharp edged teeth are quickly destroyed.
  • v V v 1.,Afrusto-conical drilling tool having a cone 40 shaped. cutting area provided with a plurality of axially aligned rows of cutting teeth alternate teeth having cutting surfaces terminating in. either a flat top grinding surface or a'sharp top-cutting edge,'. and "a plurality of axially ,45 aligned non-cutting surfaces disposed upon said cone between the rows of said cutting'teeth.
  • Afrustoconically shaped drilling tool hav- .ing a cone shaped eutting ar'ea, a plurality of A.frusto conicafdrilling toolfhaving-a cone r 52. shaped cutting area provided; with "a plurality of axially'aligned"rowslofrfcutting te'et h.
  • a frusto-conical drilling tool having a cone shaped cutting area provided with a plurality of axially aligned rows of cutting teeth, alternate teeth having cutting surfaces terminating in either a flat top grinding surface or a. sharp top cutting edge, and a plurality of circumferentially aligned non-cutting surfaces disposed upon said cone between the rows of cutting teeth.
  • a frusto-conical drilling tool having a cone shaped cutting area provided with a plurality of axially aligned rows of cutting teeth, alternate teeth having cutting surfaces terminating in a flat top grinding surface, and a plurality of circumferentially aligned non-cutting surfaces disposed upon said cone between the rows of said cutting teeth.
  • a frusto-conical drilling tool having a cone shaped area provided with a plurality of axially.
  • a frusto-coni cally shaped drilling tool having a cone shaped cutting area, a plurality of cutting teeth mounted on said area terminating in flat top cutting surfaces, and a plurality. of additional teeth terminating in sharp cuttingedges arranged upon said cone in alignment with respect tosaid first mentioned teeth.
  • a f-rusto-conically shaped drilling tool having a cone shaped cutting area, :ax'plurality of outin teeth mounted on'saidareaterm fiting in flat top .cuttingsurfaces, ,and a; plurality of additional teeth terininating, in sharp cutting edges arranged upon said cone in spaced relation with respect to' said first mentioned'teeth' and separated therefrom by a plurality; or axially ne n -entr e sur a e digitised be ee said teeth,
  • a frusto-conically shaped drilling tool having a cone shaped cutting area,' a' plurality of cutting teeth mounted on 'said area terminating in flat top cutting-surfaces, a plurality of additional teeth terminating in sharp cutting edges arranged upon said cone in alternate relationwith respect to said first mentioned teeth, and axially aligned non-cutting areas disposed between the said teeth terminating in flat top cutting surfaces and the said teeth terminating in sharp cutting edges.
  • a frusto-conically shaped drilling tool having a cone shaped cutting area, a plurality of 10 cutting teeth mounted on said area terminating in flat top cutting surfaces, a plurality of additional teeth terminating in sharp cutting edges arranged upon said cone in alternate relation with respect to said first mentioned teeth, and circumferentially aligned non-cutting areas disposed between the said teeth terminating in flat top cutting surfaces and the said teeth terminating in sharp cutting edges.

Description

Jan. 14, 1936. H. ROGATZ 2,027,700
DRILL CUTTER Filed Dec. 50, 1953 Z SheetS-Sheet 1 IN V EN TOR.
HENRY ROGATZ A TITORNEYS.
' Jan, M, 1936, H GATZ 2;,@27,700
DRILL CUTTER Filed Dec. 50, 1933 2 Sheets-Sheen 2 INVENTOR. HENRY ROGATZ A TTORNEYS.
. Patented Jan. 14, 1936 I I UNITED STATES PATIENT OFFICE DRILL CUTTER Henry Rogatz, Sayre, kla., assignor to Phillips Petroleum Company, Bartlesville, 0kla., a corporation of Delaware Application December 30, 1933, Serial No. 704,686
15 Claims. (Cl. 255-71) This invention relates to an improved type of having alternating flat edged and sharp edged cutters for roller boring drills. teeth. It has often been found that in drilling wells, F gu 2 is a portional d View Of the cutter particularly oil and gas wells, many hard formashown in Figure 1 and ow the longitudinal tions are encountered, such as granite wash and w of fiat d d t et alternating w the similar hard formations. In rotary drilling oplon itud nal rows f sha p d d t h, all erations, hard formation bits are usually used to iIlg tapered Sidesdrill through hard formations; particularly u e 3 is a ec n p V Of a cutie! granite wash, which consists of individual grains having all fl edged teeth w tapering id or fragments of granite imbedded in a solid for- Figure 4 is a Sectional p View Of a cutter 10 mation which is not so hard as granite. The having circumferential rows of flat edged teethcustomary type of cutters used in su h drilling alternating with circumferential rows of sharp have sharpened wedge shaped teeth that interedged teethw mesh as the cutters rotate, creating a cutting, Figure 5 is a portional SideVieW Of a cutter and to some extent a crushing, effect upon the having all flat edged teeth with tapering sides. formation at the bearing surface of the bit. Fi ure 6 is a portional side view of a cutter I have discovered that cutters, having flat- Showing circumferential rows of flat edged tened teeth, provide a more efli ieni; crushing teeth alternating with circumferential rows of action than cutters having sharpened or wedge Sharp edged teeth, all having tapering Sidesshaped teeth. Figure 7 is'a sectional top view of a cutter 20 Advantages of this invention over drill cuthaving alternating flat edged and Sharp d d ters of the conventional type are, longer life for teeth with tapering drill bits, faster drilling, fewer replacements and Figure 3 is a Portiona1 side View of the cutter changes, more sturdy construction with less shown in Figure Showing the flat edged teeth breaking of teeth and savings in time ordinarily alternating diagonally with the, sharp edged 25 consumed in taking outobits 130,138 rebuilt. teeth, ll hayingfiapermg Sides The pri nary object of this invention, which Figure 9 is a view of the cutter'm its position provides cutters with flat edged teeth, is to effect a a more thorou h crush- With particular reference to the drawings. through whichga hole s g gg g gfi i wherein like reference characters indicate corre- 30 th spending parts, the letter X designates a portion Al ough the teeth of the cutters described m of the I 1 of a 1 1] cutter, and Figure 1 shows this wedg mr d l ii e r 'ifzl' d iil io ii i z c g a topview the Portion X howing the arrangement thereon of alternating flat and sharp prises cutters having all teeth with flattened 3 points and having tapered sides to r t I edged teeth spaced apart so as to permit mter- .5.) gm; p even meshing with other cutters. Another view of In the event formations are encountered that 222: itfi g g gifi g ggi g- :2 jfi tfi fm require more cutting than crushing action the 4 pering sides of the teeth and spaces C into which more sluitablie type of cutters would be those havthe other cuttells fit and mt esh as the cut- 40 mg a erna ing wedge shaped and flattened teeth. The alternating type of cutters would be 2 5 5: @5 5: i s: $2 1; ggg t itfi ifioilgitfi I partimlarlyv wen adapted for use in arming dinal rows alternating with sharp edged teeth through a solid hard formation, the knife edged in longitudinal rows The cutter. shown in Wedge Shaped teeth functimingim cut ure 4 and Figure 6 shows fiat edged teeth A in break up the formation andflthe blunt flat edged circumferential rows alternating with sharp tfi ttetirttt tiifutitilttfittvt edged teeth B 5 gg g g g g g+ n ta 1" sies. ecu rs ownin e The foregoing objects of this inventionwill be a ind l 'ig u re 5 shows all flat edged teeth with further described in detail and the novel feat ering sides. The cutter shown in Figure 7. 50 tures thereof disclosed more fully as the descripand Figure 8 shows flat edged teeth alternating tion proceeds, with the aid of the accompanyin diagonally with sharp edged teeth with spaces 0 gw e nd pp nded cl imsinto which the corresponding teeth of other cute erring now to the drawings: ters fit as the cutters rotate. v p Figure 1 is a Sectional top view f a cutter As an example to show the application of my new type of cutters to the drilling of a granite wash formation, the drill bit is utilized, as shown in Figure 9 of the drawings, which is a conventional type of rotary drill bit. For drilling through'such a formation, cutters, as shown in Figure 3 and Figure 5 on which are mounted flat edged teeth A, are attached to the bit in the conventional manner. I have found that drilling, through this type of formation is greatly expedited by an action which crushes the hard granite surfaces rather than by an action which attempts to out such hard surfaces, since it has been found heretofore that cutters having sharp edged teeth are quickly destroyed.
found that sharp edged cutters must be replaced or rebuilt about every five'feet whereas the fiat edged teeth of my invention insures a more efiicient crushing action and may be used in drilling from 10 to 15 feet without replacement. Likewise, in drilling with cutters having sharp "edged teeth, it requires about 12 hours to drill v 8 feet; whereas, by the use of my cutters having flat teeth, only 12 hours are required to drill 2'5'from 16 to 24 feet.
In formations of varying hardness it may be found preferable to employ a bit having several cones, one or more of whichmay have mounted thereon cutting teeth with wedge shaped edges,
39 the others having mounted thereon cutting teeth with flat surfaces or any combination of ar-' rangement of teeth described above.
' I do not desire to be limited by'the shape or size of teeth in my cutters norto the shape or size of cutters except insofar as I may be limited by the scope of the appended claims.
Having thus described my invention, 'what I claim is: v V v 1.,Afrusto-conical drilling tool having a cone 40 shaped. cutting area provided with a plurality of axially aligned rows of cutting teeth alternate teeth having cutting surfaces terminating in. either a flat top grinding surface or a'sharp top-cutting edge,'. and "a plurality of axially ,45 aligned non-cutting surfaces disposed upon said cone between the rows of said cutting'teeth.
. 2. Afrustoconically shaped drilling tool hav- .ing a cone shaped eutting ar'ea, a plurality of A.frusto conicafdrilling toolfhaving-a cone r 52. shaped cutting area provided; with "a plurality of axially'aligned"rowslofrfcutting te'et h. alternate..,teeth having cutting surfaces terminating one between' theflrowsofxsaid'cutting ed'l area-' -providedwwith a plurality of ax"- ally aligned rows of ,.,cutting teeth}: alternate eethrhav ing-xfiutting surfaces terminating in'a harp top cuttingqedge, and'a' plurality'ofaxially ligned non-cutting surfaces disposed upon said cone between. the rows of said cutting teeth.
shaped cutting area provided ,with a plurality -of;"circumferentially -aligned rows ofcutting teeth, alternate teeth having cutting surfaces terminating in either aflat top grinding sur- In actual experience it has been I ,1.l ationwithrespectto .said first teeth mentioned. i
-.in; 'a fiat-top grinding surface, and a plurality of axially alignednomcutting'surfaces ;disposed M v z having'acone shaped cutting area, rusto-jconical drillingtjoolhaving 'a' cone, v e e H I I natingin flat top cuttingsurf fes a p :..5. 7A frusto-conicaldrilling tool having a cone.
surfaces disposed upon said cone between the rows of said cutting teeth. 1
6. A frusto-conical drilling tool having a cone shaped cutting area provided with a plurality of axially aligned rows of cutting teeth, alternate teeth having cutting surfaces terminating in either a flat top grinding surface or a. sharp top cutting edge, and a plurality of circumferentially aligned non-cutting surfaces disposed upon said cone between the rows of cutting teeth.
7. A frusto-conical drilling tool having a cone shaped cutting area provided with a plurality of axially aligned rows of cutting teeth, alternate teeth having cutting surfaces terminating in a flat top grinding surface, and a plurality of circumferentially aligned non-cutting surfaces disposed upon said cone between the rows of said cutting teeth.
8. A frusto-conical drilling tool having a cone shaped area provided with a plurality of axially.
aligned rows of cutting teeth, alternate teeth having cutting surfaces terminating in .a, sharp and teeth terminating in sharp cutting edges.
' 10. A frusto-coni cally shaped drilling tool having a cone shaped cutting area, a plurality of cutting teeth mounted on said area terminating in flat top cutting surfaces, and a plurality. of additional teeth terminating in sharp cuttingedges arranged upon said cone in alignment with respect tosaid first mentioned teeth.
'11. A f-rusto-conically shaped drilling tool having a cone shaped cutting area, :ax'plurality of outin teeth mounted on'saidareaterm fiting in flat top .cuttingsurfaces, ,and a; plurality of additional teeth terininating, in sharp cutting edges arranged upon said cone in spaced relation with respect to' said first mentioned'teeth' and separated therefrom by a plurality; or axially ne n -entr e sur a e digitised be ee said teeth,
having j a Lconefg'shape'd cutting, rea, a plurality of cuttingyteeth mounted onjsaid area; terminat ing mifl t t s ing. g f a ri a u al ty of additional,Iteethfterminated.in sharp cutting edges arr n ed 'uri 'n .said'qo in. attest-reation' withfrespect to; said first; mentioned teeth and separated therefrom by H a plurality of circumferentially aligned nonfcutting: s' faces: disqs etw ea d s ha.
13.;A frustoacbniically "sha have. l ra ity ea I termiof cutting? teeth ineunted. on' said ledges, arrang d upon s a'id lcone, 1n"a'.lternate "relation "with; respect) to I said first mentioned teeth, and axiallyiandj .ircumferentiallyaligned non-cutting areas disposed between the said teeth terminating in flat top. cutting surfaces and the'said' teeth terminating in's'harp cutting edges." p
14. A frusto-conically shaped drilling tool having a cone shaped cutting area,' a' plurality of cutting teeth mounted on 'said area terminating in flat top cutting-surfaces, a plurality of additional teeth terminating in sharp cutting edges arranged upon said cone in alternate relationwith respect to said first mentioned teeth, and axially aligned non-cutting areas disposed between the said teeth terminating in flat top cutting surfaces and the said teeth terminating in sharp cutting edges.
15. A frusto-conically shaped drilling tool having a cone shaped cutting area, a plurality of 10 cutting teeth mounted on said area terminating in flat top cutting surfaces, a plurality of additional teeth terminating in sharp cutting edges arranged upon said cone in alternate relation with respect to said first mentioned teeth, and circumferentially aligned non-cutting areas disposed between the said teeth terminating in flat top cutting surfaces and the said teeth terminating in sharp cutting edges.
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2533258A (en) * 1945-11-09 1950-12-12 Hughes Tool Co Drill cutter
US2533257A (en) * 1945-06-02 1950-12-12 Hughes Tool Co Drill cutter
US2598518A (en) * 1948-04-21 1952-05-27 Normand E Dufilho Rock bit
US3018835A (en) * 1956-11-01 1962-01-30 Reed Roller Bit Co Drill bit for producing an irregular indentation pattern on the bottom of a well bore
US3504751A (en) * 1968-02-20 1970-04-07 Tariel Georgievich Agoshashvil Drill bit
US4940099A (en) * 1989-04-05 1990-07-10 Reed Tool Company Cutting elements for roller cutter drill bits
US5636700A (en) * 1995-01-03 1997-06-10 Dresser Industries, Inc. Roller cone rock bit having improved cutter gauge face surface compacts and a method of construction
US5709278A (en) * 1996-01-22 1998-01-20 Dresser Industries, Inc. Rotary cone drill bit with contoured inserts and compacts
US5722497A (en) * 1996-03-21 1998-03-03 Dresser Industries, Inc. Roller cone gage surface cutting elements with multiple ultra hard cutting surfaces

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2533257A (en) * 1945-06-02 1950-12-12 Hughes Tool Co Drill cutter
US2533258A (en) * 1945-11-09 1950-12-12 Hughes Tool Co Drill cutter
US2598518A (en) * 1948-04-21 1952-05-27 Normand E Dufilho Rock bit
US3018835A (en) * 1956-11-01 1962-01-30 Reed Roller Bit Co Drill bit for producing an irregular indentation pattern on the bottom of a well bore
US3504751A (en) * 1968-02-20 1970-04-07 Tariel Georgievich Agoshashvil Drill bit
US4940099A (en) * 1989-04-05 1990-07-10 Reed Tool Company Cutting elements for roller cutter drill bits
US5636700A (en) * 1995-01-03 1997-06-10 Dresser Industries, Inc. Roller cone rock bit having improved cutter gauge face surface compacts and a method of construction
US5709278A (en) * 1996-01-22 1998-01-20 Dresser Industries, Inc. Rotary cone drill bit with contoured inserts and compacts
US5722497A (en) * 1996-03-21 1998-03-03 Dresser Industries, Inc. Roller cone gage surface cutting elements with multiple ultra hard cutting surfaces

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