CA1311745C - Drill bit having improved cutter configuration - Google Patents
Drill bit having improved cutter configurationInfo
- Publication number
- CA1311745C CA1311745C CA000604897A CA604897A CA1311745C CA 1311745 C CA1311745 C CA 1311745C CA 000604897 A CA000604897 A CA 000604897A CA 604897 A CA604897 A CA 604897A CA 1311745 C CA1311745 C CA 1311745C
- Authority
- CA
- Canada
- Prior art keywords
- cutting
- face
- segments
- drill bit
- diamond
- Prior art date
- 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
Links
- 239000010432 diamond Substances 0.000 claims abstract description 17
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims 1
- 150000002500 ions Chemical class 0.000 description 2
- MXBCYQUALCBQIJ-RYVPXURESA-N (8s,9s,10r,13s,14s,17r)-13-ethyl-17-ethynyl-11-methylidene-1,2,3,6,7,8,9,10,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-17-ol;(8r,9s,13s,14s,17r)-17-ethynyl-13-methyl-7,8,9,11,12,14,15,16-octahydro-6h-cyclopenta[a]phenanthrene-3,17-diol Chemical compound OC1=CC=C2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1.C1CC[C@@H]2[C@H]3C(=C)C[C@](CC)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 MXBCYQUALCBQIJ-RYVPXURESA-N 0.000 description 1
- PBAYDYUZOSNJGU-UHFFFAOYSA-N chelidonic acid Natural products OC(=O)C1=CC(=O)C=C(C(O)=O)O1 PBAYDYUZOSNJGU-UHFFFAOYSA-N 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 101150085091 lat-2 gene Proteins 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- BALXUFOVQVENIU-KXNXZCPBSA-N pseudoephedrine hydrochloride Chemical compound [H+].[Cl-].CN[C@@H](C)[C@@H](O)C1=CC=CC=C1 BALXUFOVQVENIU-KXNXZCPBSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/56—Button-type inserts
- E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
- E21B10/5676—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts having a cutting face with different segments, e.g. mosaic-type inserts
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
DRILL BIT HAVING IMPROVED CUTTER CONFIGURATION
ABSTRACT
Drill bits may include cutting members which have cutting faces formed of segments of differing cutting materials. The faces of the cutting members may include two or more segments, with the segments formed from at least two different materials. For example, a first segment could be formed of a polycrystalline diamond compact surface while a second segment could be formed of a thermally stable diamond product material.
ABSTRACT
Drill bits may include cutting members which have cutting faces formed of segments of differing cutting materials. The faces of the cutting members may include two or more segments, with the segments formed from at least two different materials. For example, a first segment could be formed of a polycrystalline diamond compact surface while a second segment could be formed of a thermally stable diamond product material.
Description
'UL-el5~ 5~ rlLr' WHITE rJU~`E~ TEL ~0:7i3-7~9-2~79 #2E32 P0~ _.
131174~
DRILL B~T ~AVING IMPROv~D ~U~`TE~ CQN~IGU~ATION
The pre~ent inv0ntion relat~s g~nerally to drill 1~ bit~, and, ~o~e speci ically~ re1a~es t~ drill bits having improv~d cutter co~iigurations.
.
Drill kits pre~ently known to the indu~try which utilize stationa~y cutting members typically use eit~er :~lS na~ural or synthetic diamonds ~s c~ttil~g elements, a~d are ~:conventionally known as "diamond ~its"~ Re~erencea herein to "dia~ond hit~" o~ "diamond drill bi~s" refer to all bit~, ~or either drill~nq or coring, having primarily ~ta~ionary ~utting me~be~s. Conven~iQIlal dia~ond drill bits m~y have a vari~ty oE diff~rent types of ~utting ~ur~ace3, ~uch as, ~or example polycry.italline diamond :
c~pact (PD~ tter~, thermally stable ~amond product (~p~ cutters, mosaic-type cutters and dia~ond impregnated 3tud cutt~r~. Mo aic cutter~ ~re typi~lly for~ed ~f ~
pluralit~ of ~eometrically-~haped therrnally s~able diamond ; elements co~pe~atiY~ly arranqed and bollded in a desired sh~pe~ to fo~m a unitary:cutting ~urf~ce, ~~ GO~ n~ bi~t the di~m~nd cut~ing ~uxÇace i~
; 30 ~yp~21~ ~onded to ~ s~pporting member, which is then ~ecu~ed to ~ c~r~ier ~e~i~er whlch facllit~te3 ~tta~hment to the drill bit. The cuttlng sur~a~e lay~r 1B peeEe~a~ly ~nnected to ~he supp~rting member su~h a~ throu~h u~e of ~razing or 8~ n~erln~. P~eferably, the supporting membe~
and the ~arrler member will both be f~rm~d o~ a su~table hard or sinter~d metal, su~h a~, or ~xample, tungsten ca~b~de. ~he ~upp~rting member ~an b~ ~old0r~d o~
othsrwi~e ~onn~cted, ~uch a~ by ~orm si.nt~rlng o~ h~t iso~tati pre~ing~ to the carrler member. A d1Bcu~sion oE ~u~h a ~onventional truc~ure 1~ ound ln V~S. P~tent ~o. 4,498,54g is~ued February 12, 1985 ts the lnY2ntor o~
~he pre~ent ~pplic~ti~n, and asslgned to ~he H~slgnee o~
the pres~nt inv~ntlon.
Additionally, drill bits may ln~lude mo~e ~han one type o~ cuttlng member on ~ single bit. Some type~ of cuttin~ ~urace~ are better adapted to cut specific o~matio~ than ~re others. ~or example, while large PDC-type cutte~ are extremely ef~lcierit at cuttlng sh~les and other ~imll~rly ~oEt ~ormaLions, th~y ar~ ~ui~kly broken or abr~ded in hard formstions. Other ~utt;n~
surf~eBl howevee, su~h a~ mosaic surfclces, will cut ~5 throu~h the harder for~ation~ satisfa¢t.otily.
Accordin~ly, ~me rela~ively re~ent diclmond dr111 bit designs have included ~ual ~ets of cutt:$ng member~, with eaoh set aomposed o~ cuttin~ members hav~ng differ~nt type6 of cuttlng ~urface~. Wi~h bi~s ~f that typ~r ~or ex~pl~, a first set of cutters is ~rrnnged on th@ b~t tn provide eR~ent~ally ~ull face coverage acros~ the ~ace o~
the bi~, and a sef~ond ~et o cu~ters, of a differ0nt typ~, rranged to provide coverage acros6 a~ le~t a port1on of the blt ~aoe~ An example of a bit of thl~ typ~ i~
di~closed in Canadian patent application s~rial number 597,653 flle~ Apri~ ~5~ 198g in t~e nam~s oP Mark Jone~ ~nd M~rk f ' JuL~ s~ 16:5~ i`lOLD ~ llTE r/URl'Fc TEL ~`10:71~ ,~3e-~s7s #2~3 P05 ~ 33~
Clench, and a~sign~d to the a3~ignee of the pre~ent . invention.
Such blts with dual cutter sets, ~Ihil~ performing ex~epti~nally well in ~ome applications, may not be fea~lble for u~e with all types of bits. Por example, with bits h~ving cutting members with large cutting surfaces, such as one inch or greater i.n diameter, it may not be ~easib~e to include two sets of cutters on a single lQ bit. Additionally, e~en if the additional cutter ~et ~ould be i~.cluded on a sin~le b~t, the ~xtsa suE~ace area : c~uld interere with chlp removal, or ~ ould raise the total ~ott~. hole surface ~ea contac~ing the fo~mation to ~ level whi~h would require an un~ccept:ably high weight-on~bi~ to cut the formation.
Accordin~ly, the present lnvention provides a new ~ethod and apparatus for including c~mE~osite cutting ~urfaces on a sinqle drill bit, ~hereb~ the exposed f~e of the cutting mQmber ~ay be maint~ined at a de~ired size~
but whQr~y that ~ace can be composed ~f difeerent cutting suraGes adapted to perform differently in the earth ~ form~tion~.
:~ ~S ~rill b~ts in accordance with the present invention include ~t le~s:t some cutting members ~hich include cut~lng face~ w~th ~ultiple ~egment~ of cuttln~ ma~erials.
-~ach ~utting member in aec~rdance with the present in~ntion will include at least two se~ments, which are formed of at ~ea~t two materials. The cuttins material segments will h~ve expo~ed ~ace which coope~tively Eor~
the cutting face of th~ cutting memb~r. The segment faces wlll pre~e~ly lie in generally paral~eL plane~, and most : preferabl~y w~ll be ~enerally coplanar.
: 35 ~T!_IL-~15-'89 1~:5~ ID~ I.. ILl~ IJHI,C rllJRKEE TEL ~5~1:71~-789-267~ #2~37 P06 -13~7~
P'igur~ 1 depic~s a diatnond drill bit having cu~ting members in ~ccordance with the present lnvention.
Fi~ure 2 depict~ that an isolated cuttin~ 0ember o~
5 the dri11 bit of ~igure 1.
~ igures 3A-~ depict exemplary alterna~lve ~uttin~
Eaces ~or a cutting member in accordance with th0 prèsent ln~enti~n, 1~
R~ferring now t~ the drawings in mc~r~ detail, and particularly to Piqure l, th~rein i~ deE~icted an exetnplary etnbodiment of a drill bit lO in aocordallc,e wlth the pre~ent inv~ntion. ~rill bit 10 includ~s a b~dy ~ection lS 12 whi~h carries a plurali~y of cut~ing member~ 15. ~ody 12 i8 preEerably a mold~d compo~ent Eabr.icated ~hrough ~c>nventional met~l matrix infiltration ~echnology. Body - s~c~ion 12 i~ coupl~d to a shank 18 whi~h includes a ~: th~eaded po~tion 20. ~hank 18 and body 12 are preferably ~or~ed ~o be ~nc~ionally integral with one an~ther.
Drill bit lO inctude~ an internal reces~; ~not illustrated), throu~h whi~h hydraulic fluid will flo~, A
plurality oE no~21es 22 are pla~ed in body 12 to di8tribute hydr~lic flow proximate the ~ac~s ~f cuttin~
m~mbers l~.
Re~e~Fn~ now alsv to Fi~e 2, therein i~ depic~e~
an ~xomplary cut~ing member 16 tn gre~t~r detail. ~h~
cut~in~ E~ce ~4 oE cutting member 16 include two 30 segments, 26 and 28. C~ltting ~ase se~ments ~ an~i 28 will each ~ie fo~med of a layer oE a cut~ing rlaterial, but will orfned oi~ dlf~re~ ~ypes o~ cutt~t~g material. ~or ex~mpie, segment 2~ .~y be a ~C ci~ttini3 layer, while isegmsnt 2~ 7~y b~ a T~P c~t~ing l~yer. Cutting ~ace ~ o 35 cutting mem~er 1~ may be ~or~d of segm~2ints arranged in ~UL-~15-'59 16:CI ID~ lCILr IllHITE r~UF'h:EE TEL r~n 713-789-2S79 ~20Z P~7 ~
~3117~!~
any o~ ~ variety of conformities, and ,~uch ~ace ~egments ~ay be Eormed of ~,ny o~ a variety suitable material~.
~eEerring now ~o Figures 3A-~! therein are depicted S exemplary altern~tive ~nfig~lrations and con~tru~tlons for th~ ~utting face of a cut~ing member ~ as depicted in .Fi3ure~ 1 and 2. Figure 3A depiets a cutting face 30 having a P~ face segnlent 3~ and a mosaie face segment 34.
~he two C~e~ment- 3~ and 34 ~re symmetrically arran~ed relative to a vertical axi5. ~ig~re 3R depict~ a face segment 36 h~,ving three generally vertie~lly extending faces 38, 40 and 42, ~ymmetri~ally arranged about a central ve~tical diameter. In the depicted embodiment, : outer face segments 3~ and 42 are of ~ first t~tpe Of cutting su~face, while centr~l f'a~e segment 40 is of a ~econd typ~ oÇ cutting surface.
: ~igure ~C depi~ts a cuttlng ~ace 44, whlch ls similar in constrU~ti~n to cut~ins ~ace ~6 of E~igure 3B, with the 2~ ax~eption that th~ Eace ~egments 4~, 4a and 50 are symmetrically di~pu~ed a~out a nonvertical diameter.
~ Fi~ure 3D depi~t~ a two segment cutt~ng face 5~, with face: Qegments di~tributed on either ~ide of a horizontal diameter. Here again, uppe~ segment 54 may be of a 25 m~erl~ ~uch a~ ~ PD~ laye~, ~hile lo~er ~egment 5~ may ~e of a diff~rent mater~al, such ae a 1'SP or mo~
material.
Figure 3~ depicts an ~xemplar~ emk~odiment where the ~0 cutting face 5~ is ~i~rided int~ a plur~lity of guadrant face segment~ 60, 62, ~4 and ~. These ~ace segments 60, ~Z, 64 and 6~ can b~ formed, ~or ex~mp~e, of t~o alternatll~g cutting layer materials or c~uld all be ~o~med of ~l~fer~nt ~utting layer m2terials.
JUL-ia5-~l~q iS~ Ir':~NOL~ IHITE WRhEE Tl NO:71~-713~---'67g #202 PE18 _ _ ~3~7~
Fi~ur~ 3F ~depict~ an embodiment simi lar to that of Pigure~ 3~ and 3C, with the exception that the three ~ace segmentg o~ cutting ~a~E ~ re disposed symm~trieally rel~tive to a h~riz~ntal di.ametrical a~
Many nlodifications and variations may be made in the techr.ique~- and ~tru~t~r~s des~ribed ~nd illustrated herein without depar~ing fs~n ttl~ ~pi~ ~ and scope o~ the present invention. For example, the multiple nlateri~l cutting lo f~ce ~egment~ may b~ for~ed ~ virtually ~ny appropriate material, and-may be arrarlged in a vari.ety of pattern~ in addition to those de~cri~e~ ~and depiet~!d herein.
Accordlngly, the techni~uec~ and struct~lre3 described ~nd illustrat~d herein are exemplary only and are not to be 15 considered a6 llmlta~ions on the scc)pe ~f the present invention .
131174~
DRILL B~T ~AVING IMPROv~D ~U~`TE~ CQN~IGU~ATION
The pre~ent inv0ntion relat~s g~nerally to drill 1~ bit~, and, ~o~e speci ically~ re1a~es t~ drill bits having improv~d cutter co~iigurations.
.
Drill kits pre~ently known to the indu~try which utilize stationa~y cutting members typically use eit~er :~lS na~ural or synthetic diamonds ~s c~ttil~g elements, a~d are ~:conventionally known as "diamond ~its"~ Re~erencea herein to "dia~ond hit~" o~ "diamond drill bi~s" refer to all bit~, ~or either drill~nq or coring, having primarily ~ta~ionary ~utting me~be~s. Conven~iQIlal dia~ond drill bits m~y have a vari~ty oE diff~rent types of ~utting ~ur~ace3, ~uch as, ~or example polycry.italline diamond :
c~pact (PD~ tter~, thermally stable ~amond product (~p~ cutters, mosaic-type cutters and dia~ond impregnated 3tud cutt~r~. Mo aic cutter~ ~re typi~lly for~ed ~f ~
pluralit~ of ~eometrically-~haped therrnally s~able diamond ; elements co~pe~atiY~ly arranqed and bollded in a desired sh~pe~ to fo~m a unitary:cutting ~urf~ce, ~~ GO~ n~ bi~t the di~m~nd cut~ing ~uxÇace i~
; 30 ~yp~21~ ~onded to ~ s~pporting member, which is then ~ecu~ed to ~ c~r~ier ~e~i~er whlch facllit~te3 ~tta~hment to the drill bit. The cuttlng sur~a~e lay~r 1B peeEe~a~ly ~nnected to ~he supp~rting member su~h a~ throu~h u~e of ~razing or 8~ n~erln~. P~eferably, the supporting membe~
and the ~arrler member will both be f~rm~d o~ a su~table hard or sinter~d metal, su~h a~, or ~xample, tungsten ca~b~de. ~he ~upp~rting member ~an b~ ~old0r~d o~
othsrwi~e ~onn~cted, ~uch a~ by ~orm si.nt~rlng o~ h~t iso~tati pre~ing~ to the carrler member. A d1Bcu~sion oE ~u~h a ~onventional truc~ure 1~ ound ln V~S. P~tent ~o. 4,498,54g is~ued February 12, 1985 ts the lnY2ntor o~
~he pre~ent ~pplic~ti~n, and asslgned to ~he H~slgnee o~
the pres~nt inv~ntlon.
Additionally, drill bits may ln~lude mo~e ~han one type o~ cuttlng member on ~ single bit. Some type~ of cuttin~ ~urace~ are better adapted to cut specific o~matio~ than ~re others. ~or example, while large PDC-type cutte~ are extremely ef~lcierit at cuttlng sh~les and other ~imll~rly ~oEt ~ormaLions, th~y ar~ ~ui~kly broken or abr~ded in hard formstions. Other ~utt;n~
surf~eBl howevee, su~h a~ mosaic surfclces, will cut ~5 throu~h the harder for~ation~ satisfa¢t.otily.
Accordin~ly, ~me rela~ively re~ent diclmond dr111 bit designs have included ~ual ~ets of cutt:$ng member~, with eaoh set aomposed o~ cuttin~ members hav~ng differ~nt type6 of cuttlng ~urface~. Wi~h bi~s ~f that typ~r ~or ex~pl~, a first set of cutters is ~rrnnged on th@ b~t tn provide eR~ent~ally ~ull face coverage acros~ the ~ace o~
the bi~, and a sef~ond ~et o cu~ters, of a differ0nt typ~, rranged to provide coverage acros6 a~ le~t a port1on of the blt ~aoe~ An example of a bit of thl~ typ~ i~
di~closed in Canadian patent application s~rial number 597,653 flle~ Apri~ ~5~ 198g in t~e nam~s oP Mark Jone~ ~nd M~rk f ' JuL~ s~ 16:5~ i`lOLD ~ llTE r/URl'Fc TEL ~`10:71~ ,~3e-~s7s #2~3 P05 ~ 33~
Clench, and a~sign~d to the a3~ignee of the pre~ent . invention.
Such blts with dual cutter sets, ~Ihil~ performing ex~epti~nally well in ~ome applications, may not be fea~lble for u~e with all types of bits. Por example, with bits h~ving cutting members with large cutting surfaces, such as one inch or greater i.n diameter, it may not be ~easib~e to include two sets of cutters on a single lQ bit. Additionally, e~en if the additional cutter ~et ~ould be i~.cluded on a sin~le b~t, the ~xtsa suE~ace area : c~uld interere with chlp removal, or ~ ould raise the total ~ott~. hole surface ~ea contac~ing the fo~mation to ~ level whi~h would require an un~ccept:ably high weight-on~bi~ to cut the formation.
Accordin~ly, the present lnvention provides a new ~ethod and apparatus for including c~mE~osite cutting ~urfaces on a sinqle drill bit, ~hereb~ the exposed f~e of the cutting mQmber ~ay be maint~ined at a de~ired size~
but whQr~y that ~ace can be composed ~f difeerent cutting suraGes adapted to perform differently in the earth ~ form~tion~.
:~ ~S ~rill b~ts in accordance with the present invention include ~t le~s:t some cutting members ~hich include cut~lng face~ w~th ~ultiple ~egment~ of cuttln~ ma~erials.
-~ach ~utting member in aec~rdance with the present in~ntion will include at least two se~ments, which are formed of at ~ea~t two materials. The cuttins material segments will h~ve expo~ed ~ace which coope~tively Eor~
the cutting face of th~ cutting memb~r. The segment faces wlll pre~e~ly lie in generally paral~eL plane~, and most : preferabl~y w~ll be ~enerally coplanar.
: 35 ~T!_IL-~15-'89 1~:5~ ID~ I.. ILl~ IJHI,C rllJRKEE TEL ~5~1:71~-789-267~ #2~37 P06 -13~7~
P'igur~ 1 depic~s a diatnond drill bit having cu~ting members in ~ccordance with the present lnvention.
Fi~ure 2 depict~ that an isolated cuttin~ 0ember o~
5 the dri11 bit of ~igure 1.
~ igures 3A-~ depict exemplary alterna~lve ~uttin~
Eaces ~or a cutting member in accordance with th0 prèsent ln~enti~n, 1~
R~ferring now t~ the drawings in mc~r~ detail, and particularly to Piqure l, th~rein i~ deE~icted an exetnplary etnbodiment of a drill bit lO in aocordallc,e wlth the pre~ent inv~ntion. ~rill bit 10 includ~s a b~dy ~ection lS 12 whi~h carries a plurali~y of cut~ing member~ 15. ~ody 12 i8 preEerably a mold~d compo~ent Eabr.icated ~hrough ~c>nventional met~l matrix infiltration ~echnology. Body - s~c~ion 12 i~ coupl~d to a shank 18 whi~h includes a ~: th~eaded po~tion 20. ~hank 18 and body 12 are preferably ~or~ed ~o be ~nc~ionally integral with one an~ther.
Drill bit lO inctude~ an internal reces~; ~not illustrated), throu~h whi~h hydraulic fluid will flo~, A
plurality oE no~21es 22 are pla~ed in body 12 to di8tribute hydr~lic flow proximate the ~ac~s ~f cuttin~
m~mbers l~.
Re~e~Fn~ now alsv to Fi~e 2, therein i~ depic~e~
an ~xomplary cut~ing member 16 tn gre~t~r detail. ~h~
cut~in~ E~ce ~4 oE cutting member 16 include two 30 segments, 26 and 28. C~ltting ~ase se~ments ~ an~i 28 will each ~ie fo~med of a layer oE a cut~ing rlaterial, but will orfned oi~ dlf~re~ ~ypes o~ cutt~t~g material. ~or ex~mpie, segment 2~ .~y be a ~C ci~ttini3 layer, while isegmsnt 2~ 7~y b~ a T~P c~t~ing l~yer. Cutting ~ace ~ o 35 cutting mem~er 1~ may be ~or~d of segm~2ints arranged in ~UL-~15-'59 16:CI ID~ lCILr IllHITE r~UF'h:EE TEL r~n 713-789-2S79 ~20Z P~7 ~
~3117~!~
any o~ ~ variety of conformities, and ,~uch ~ace ~egments ~ay be Eormed of ~,ny o~ a variety suitable material~.
~eEerring now ~o Figures 3A-~! therein are depicted S exemplary altern~tive ~nfig~lrations and con~tru~tlons for th~ ~utting face of a cut~ing member ~ as depicted in .Fi3ure~ 1 and 2. Figure 3A depiets a cutting face 30 having a P~ face segnlent 3~ and a mosaie face segment 34.
~he two C~e~ment- 3~ and 34 ~re symmetrically arran~ed relative to a vertical axi5. ~ig~re 3R depict~ a face segment 36 h~,ving three generally vertie~lly extending faces 38, 40 and 42, ~ymmetri~ally arranged about a central ve~tical diameter. In the depicted embodiment, : outer face segments 3~ and 42 are of ~ first t~tpe Of cutting su~face, while centr~l f'a~e segment 40 is of a ~econd typ~ oÇ cutting surface.
: ~igure ~C depi~ts a cuttlng ~ace 44, whlch ls similar in constrU~ti~n to cut~ins ~ace ~6 of E~igure 3B, with the 2~ ax~eption that th~ Eace ~egments 4~, 4a and 50 are symmetrically di~pu~ed a~out a nonvertical diameter.
~ Fi~ure 3D depi~t~ a two segment cutt~ng face 5~, with face: Qegments di~tributed on either ~ide of a horizontal diameter. Here again, uppe~ segment 54 may be of a 25 m~erl~ ~uch a~ ~ PD~ laye~, ~hile lo~er ~egment 5~ may ~e of a diff~rent mater~al, such ae a 1'SP or mo~
material.
Figure 3~ depicts an ~xemplar~ emk~odiment where the ~0 cutting face 5~ is ~i~rided int~ a plur~lity of guadrant face segment~ 60, 62, ~4 and ~. These ~ace segments 60, ~Z, 64 and 6~ can b~ formed, ~or ex~mp~e, of t~o alternatll~g cutting layer materials or c~uld all be ~o~med of ~l~fer~nt ~utting layer m2terials.
JUL-ia5-~l~q iS~ Ir':~NOL~ IHITE WRhEE Tl NO:71~-713~---'67g #202 PE18 _ _ ~3~7~
Fi~ur~ 3F ~depict~ an embodiment simi lar to that of Pigure~ 3~ and 3C, with the exception that the three ~ace segmentg o~ cutting ~a~E ~ re disposed symm~trieally rel~tive to a h~riz~ntal di.ametrical a~
Many nlodifications and variations may be made in the techr.ique~- and ~tru~t~r~s des~ribed ~nd illustrated herein without depar~ing fs~n ttl~ ~pi~ ~ and scope o~ the present invention. For example, the multiple nlateri~l cutting lo f~ce ~egment~ may b~ for~ed ~ virtually ~ny appropriate material, and-may be arrarlged in a vari.ety of pattern~ in addition to those de~cri~e~ ~and depiet~!d herein.
Accordlngly, the techni~uec~ and struct~lre3 described ~nd illustrat~d herein are exemplary only and are not to be 15 considered a6 llmlta~ions on the scc)pe ~f the present invention .
Claims (12)
1. A rotary drill bit for drilling a subterranean formation, comprising:
(a) a body member secured to shank means for rotating said bit about a longitudinal axis;
(b) a plurality of cutting members disposed on said body member, said cutting members each including a cutting face oriented substantially in the direction of bit rotation;
(c) each cutting face having an edge and comprising at least two laterally adjacent segments formed of different diamond cutting materials and oriented on said cutting face so that the edge thereof engaging said formation as said bit is rotated includes sectors of each of said different diamond cutting materials.
(a) a body member secured to shank means for rotating said bit about a longitudinal axis;
(b) a plurality of cutting members disposed on said body member, said cutting members each including a cutting face oriented substantially in the direction of bit rotation;
(c) each cutting face having an edge and comprising at least two laterally adjacent segments formed of different diamond cutting materials and oriented on said cutting face so that the edge thereof engaging said formation as said bit is rotated includes sectors of each of said different diamond cutting materials.
2. The drill bit of claim 1, wherein said face segments of said cutting member face lie in generally parallel planes.
3. The drill bit of claim 1, wherein said face segments of each cutting member face are generally coplanar.
4. The drill bit of claim 1, wherein at least one of said face segments is formed of a polycrystalline diamond compact surface.
5. The drill bit of claim 1, wherein at least one of said face segments comprises a thermally stable diamond surface.
6. The drill bit of claim 1, wherein at least one of said face segments is formed of a diamond mosaic surface.
7. A cutting member for a rotary drill bit comprising:
(a) a supporting structure mounted on said drill bit; and (b) a cutting face including a cutting edge disposed on said supporting structure and including at least two laterally adjacent segments formed of different diamond cutting materials and oriented on said cutting face so that said cutting edge thereof includes sectors of each of said different diamond cutting materials.
(a) a supporting structure mounted on said drill bit; and (b) a cutting face including a cutting edge disposed on said supporting structure and including at least two laterally adjacent segments formed of different diamond cutting materials and oriented on said cutting face so that said cutting edge thereof includes sectors of each of said different diamond cutting materials.
8. The cutting member of claim 7, wherein said cutting face segments lie in generally parallel planes.
9. The cutting member of claim 7, wherein said cutting face segments are generally coplanar.
10. The cutting member of claim 7, wherein at least one of said segments is formed of a polycrystalline diamond compact surface.
11. The cutting member of claim 7, wherein at least one of said segments is formed of a thermally stable diamond surface
12. The cutting member of claim 7, wherein at least one of said face segments is formed of a diamond mosaic surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US21549988A | 1988-07-06 | 1988-07-06 | |
| US215,499 | 1988-07-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1311745C true CA1311745C (en) | 1992-12-22 |
Family
ID=22803218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000604897A Expired - Lifetime CA1311745C (en) | 1988-07-06 | 1989-07-06 | Drill bit having improved cutter configuration |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0350045B1 (en) |
| CA (1) | CA1311745C (en) |
| DE (1) | DE68925439T2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5238074A (en) * | 1992-01-06 | 1993-08-24 | Baker Hughes Incorporated | Mosaic diamond drag bit cutter having a nonuniform wear pattern |
| ZA935525B (en) * | 1992-08-06 | 1994-02-24 | De Beers Ind Diamond | Tool insert |
| GB9827600D0 (en) * | 1998-12-15 | 1999-02-10 | De Beers Ind Diamond | Abrasive product |
| US6248447B1 (en) | 1999-09-03 | 2001-06-19 | Camco International (Uk) Limited | Cutting elements and methods of manufacture thereof |
| US8991525B2 (en) * | 2012-05-01 | 2015-03-31 | Baker Hughes Incorporated | Earth-boring tools having cutting elements with cutting faces exhibiting multiple coefficients of friction, and related methods |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3111156C1 (en) * | 1981-03-21 | 1983-04-14 | Christensen, Inc., 84115 Salt Lake City, Utah | Cutting element for rotary drill bits for deep drilling in earth formations |
| AU3946885A (en) * | 1984-03-26 | 1985-10-03 | Norton Christensen Inc. | Cutting element using polycrystalline diamond disks |
| GB8612012D0 (en) * | 1986-05-16 | 1986-06-25 | Nl Petroleum Prod | Rotary drill bits |
-
1989
- 1989-07-06 DE DE1989625439 patent/DE68925439T2/en not_active Expired - Fee Related
- 1989-07-06 EP EP19890112388 patent/EP0350045B1/en not_active Expired - Lifetime
- 1989-07-06 CA CA000604897A patent/CA1311745C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0350045B1 (en) | 1996-01-17 |
| EP0350045A2 (en) | 1990-01-10 |
| EP0350045A3 (en) | 1990-06-06 |
| DE68925439T2 (en) | 1996-08-22 |
| DE68925439D1 (en) | 1996-02-29 |
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| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |