US20040020693A1 - Drill bit - Google Patents
Drill bit Download PDFInfo
- Publication number
- US20040020693A1 US20040020693A1 US10/363,975 US36397503A US2004020693A1 US 20040020693 A1 US20040020693 A1 US 20040020693A1 US 36397503 A US36397503 A US 36397503A US 2004020693 A1 US2004020693 A1 US 2004020693A1
- Authority
- US
- United States
- Prior art keywords
- drill bit
- disc cutter
- cut
- cutter
- cutting members
- 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.)
- Abandoned
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/08—Roller bits
- E21B10/12—Roller bits with discs cutters
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/08—Roller bits
- E21B10/16—Roller bits characterised by tooth form or arrangement
Definitions
- the present invention relates to a rotary drill bit for drilling a borehole in an earth formation.
- various types of drill bits are applied, for example roller cone bits or jet cutting bits.
- These drill bits are generally provided with abrasive cutting elements which are made of a material having a high wear resistance such as diamond or tungsten carbide.
- the cutting action of these cutting elements mainly results from scraping of the elements along the borehole bottom.
- the progress of the drill bit in the borehole i.e. the speed of drilling
- depends on many factors such as the amount of wear of the cutting elements, the hardness of the rock and the weight on bit.
- WO 99/11900 discloses a rotary drill bit comprising a plurality of disc cutter formed on roller cones and arranged to cut a plurality of substantially circular, radially spaced cuts into the bottom of the borehole.
- the set of cutters of each roller cone is radially displaced relative to the set of cutters of another roller cone, so that for each pair of radially adjacent cutters a second one of the pair cuts into the borehole bottom at an angular interval behind the first one the pair.
- a body of rock material is defined between the respective cuts, which body is sheared off by the second cutter in the direction of the cut created by the first cutter.
- a rotary drill bit for drilling a borehole in an earth formation, the drill bit comprising a first and a second disc cutter, each disc cutter being arranged to roll along the borehole bottom during rotation of the drill bit and thereby to cut respective first and second substantially circular, radially spaced cuts in the borehole bottom so that a body of rock material is defined between said cuts, the second disc cutter being arranged to cut into the bottom of the borehole at a selected rotational interval of the drill bit behind the first disc cutter and to shear-off said body of rock material in the direction of the first cut, wherein each disc cutter includes a set of mutually spaced cutting members arranged to create, during a turn of the drill bit, a corresponding set of cut sections of the cut created by the disc cutter, and wherein the cutting members are arranged so that the sets of cut sections created during subsequent drill bit turns are staggered relative to each other.
- each disc cutter is formed of a set of discrete cutting members instead of the continuous disc cutter of the prior art, it is achieved that the instantaneous contact surface of the cutter with the borehole bottom is lower, leading to deeper penetration of the drill bit into the rock formation for a given weight on bit.
- the cuts created by the cutters are deeper, and thereby shearing-off of the body of rock material tends to be more in the direction of the lower end of the first cut than in the direction of the upper end thereof as in the prior art.
- FIG. 1 schematically shows a bottom view of a drill bit according to the invention
- FIG. 2 schematically shows a partial side view of the drill bit of FIG. 1;
- FIG. 3 schematically shows a bottom view of a roller cone of the drill bit of FIG. 1;
- FIG. 4 schematically shows a transverse cross section of a borehole bottom during various stages of drilling with the drill bit of FIG. 1.
- FIG. 1 a bottom view of a drill bit 1 having a bit body 3 and three roller cones 4 , 5 , 6 arranged at 120° intervals with respect to the axis of rotation 7 of the drill bit.
- the roller cones are rotatably connected to the bit body 3 .
- Roller cone 4 is provided with a set of disc cutters 4 a , 4 b , 4 c
- roller cone 5 is provided with a set of disc cutters 5 a , 5 b , 5 c
- roller cone 6 is provided with a set of disc cutters 6 a , 6 b , 6 c
- each disc cutter 4 a , 4 b , 4 c , 5 a , 5 b , 5 c , 6 a , 6 b , 6 c extending along the circumference of the respective roller cone in a plane substantially perpendicular to the axis of rotation of the roller cone.
- Each disc cutter 4 a , 4 b , 4 c , 5 a , 5 b , 5 c , 6 a , 6 b , 6 c is arranged to cut a substantially circular cut in the borehole bottom during rolling of the respective roller cone 4 , 5 , 6 along the borehole bottom when the drill bit 1 is rotated.
- FIG. 2 there is shown a partial side view of the drill bit 1 and roller cone 4 .
- the roller cones 5 , 6 are not shown for reason of simplicity, however the portions of cutters 5 b , 5 c , 6 b , 6 c at the respective points of contact with the borehole bottom are shown in phantom.
- the radially outermost cutters 4 a , 5 a , 6 a are arranged so as to cut into the borehole bottom at equal radii relative to the axis 7 , i.e. these cutters are arranged at equal axial positions on the respective roller cones 4 , 5 , 6 .
- the inner cutters 4 b , 4 c , 5 b , 5 c , 6 b , 6 c are arranged on the respective roller cones 4 , 5 , 6 in an axially (relative to the roller cone axis of rotation) staggered relationship.
- cutter 5 b cuts into the borehole bottom at a radius in between the radii at which cutters 4 a , 4 b cut into the borehole bottom
- cutter 5 c cuts into the borehole bottom at a radius in between the radii at which cutters 4 b , 4 c cut into the borehole bottom
- cutter 6 b cuts into the borehole bottom at a radius in between the radii at which cutters 4 a , 5 b cut into the borehole bottom
- cutter 6 c cuts into the borehole bottom at a radius in between the radii at which cutters 4 b , 5 c cut into the borehole bottom.
- Each disc cutter has two side surfaces 10 , 12 , whereby in FIG. 2 only the respective side surfaces 10 , 12 of cutter 4 a , 4 b , 4 c are shown for reason of simplicity.
- Each pair of side surfaces 10 , 12 define a wedge-shaped cutting edge 14 .
- each side surface 12 extends perpendicular to the axis of rotation (indicated by reference numeral 16 for roller cone 4 ) of the respective roller cone 4 , 5 , 6 so that during drilling side surface 12 pushes against the rock in the direction of the rotation axis 16 .
- Side surface 20 extends parallel to the axis of rotation 7 of the drill bit 1 at the point of contact with the borehole bottom.
- each disc cutter 4 a , 4 b , 4 c , 5 a , 5 b , 5 c , 6 a , 6 b , 6 c is provided by a set of mutually spaced recesses 20 whereby the remaining portions of the disc cutter define a corresponding set of mutually spaced cutting members 22 .
- the sets of cutting members 22 of adjacent cutters are arranged staggered relative to each other.
- Each roller cone 4 , 5 , 6 is dimensioned so that the cutting members 22 of each disc cutter of the roller cone create, during a turn of the drill bit 1 , a set of cut sections (not shown) in the borehole bottom and that the sets of cut sections created during subsequent drill bit turns are rotationally displaced relative to each other.
- the cutting members 22 of the disc cutter cut into the borehole bottom at locations not cut before by the cutting members 22 before. This implies that the complete circular cut is created by the disc cutter in a plurality of drill bit turns.
- the desired dimensioning can be achieved if it is avoided that during a subsequent drill bit turn the cutting members 22 cut exactly in the same cuts as during previous turns.
- T pitch of the cutting members.
- n being number of cutting members of the disc cutter
- f is about 0.5 the full cut is created in about two drill bit turns.
- D and d are selected so that 1.5 ⁇ D/d ⁇ 2.
- FIG. 3 In FIG. 3 is shown a bottom view of roller cone 4 with indicated values of the angular extend of the cutting members (angular extend 32°) and the recesses (angular extend 28°). Also shown is the angular overlap of 2° of the cutting members of disc cutter 4 a with the cutting members of disc cutter 4 b . A similar angular overlap exists between the cutting members of the respective cutters 4 b , 4 c.
- roller cones 4 , 5 , 6 are provided with conventional cutting inserts 26 at side surfaces 10 of the outermost cutters 4 a , 4 b , 4 c and at the inner parts of the roller cones.
- the cutters 4 b , 5 b , 5 c create respective adjacent cuts 32 , 34 , 36 in the borehole bottom. These cuts are indicated as straight lines, however in practice the cuts will have a shape corresponding more or less to the section of the cutters penetrating the borehole bottom. Lines f, g, h, i, j indicate the respective envelopes of the lower ends of the disc cutters 4 b , 5 b , 5 c as a function of the rotation angle of the drill bit.
- line g indicates the level at 120° bit rotation
- line h the level at 240° bit rotation
- line i the level at 360° bit rotation
- line j the level at 480° bit rotation.
- cutter 6 b has created cut 32 to level i, thereby defining a body of rock material 38 b between cut 34 at level g and cut 32 at level i, which body of rock material 38 b is sheared by side surface 12 of cutter 6 b along line s 2 extending between the respective cuts 34 , 32 .
- cutter 5 b has created cut 34 to level j, thereby defining a body of rock material 38 c between cut 36 at level i and cut 34 at level j, which body of rock material 38 c is sheared off by side surface 12 of cutter 5 b along line s 3 extending between the respective cuts 36 , 34 .
- the outer cutters 4 a , 5 a , 6 a cut and shear off rock material located between the cut (not shown) created by these cutters and cut 32 created by cutter 5 b , in a manner similarly as described above.
- the cutting action of cutters 4 c , 5 c , 6 c is similar to the cutting action of respective cutters 4 b , 5 b , 6 b.
- the discrete cutting sections created by the cutting members 22 extend deeper into the borehole bottom than cuts which would have been created by continuous disc cutters (i.e. cutters without recesses) at equal weight on bit. Therefore the bodies of rock material, defined between adjacent cuts, have a larger size in the direction of penetration of the drill bit, so that the mere superficial cutting action during drilling in hard formations is avoided and thereby a more efficient drilling process is achieved.
Abstract
The invention relates to a rotary drill bit for drilling a borehole in an earth formation, the drill bit comprising a first and a second disc cutter, each disc cutter being arranged to roll along the borehole bottom during rotation of the drill bit and thereby to cut respective first and second substantially circular, radially spaced cuts in the borehole bottom so that a body of rock material is defined between said cuts. The second disc cutter is arranged to cut into the bottom of the borehole at a selected rotational interval of the drill bit behind the first disc cutter and to shear-off said body of rock material in the direction of the first cut. Each disc cutter includes a set of mutually spaced cutting members arranged to create, during a turn of the drill bit, a corresponding set of cut sections of the cut created by the disc cutter, and wherein the cutting members are arranged so that the sets of cut sections created during subsequent drill bit turns are staggered relative to each other.
Description
- The present invention relates to a rotary drill bit for drilling a borehole in an earth formation. In the prior art various types of drill bits are applied, for example roller cone bits or jet cutting bits. These drill bits are generally provided with abrasive cutting elements which are made of a material having a high wear resistance such as diamond or tungsten carbide. The cutting action of these cutting elements mainly results from scraping of the elements along the borehole bottom. The progress of the drill bit in the borehole (i.e. the speed of drilling) depends on many factors such as the amount of wear of the cutting elements, the hardness of the rock and the weight on bit. As the costs of drilling of a wellbore form a substantial part of the overall wellbore costs there is a continuous need to reduce the drilling time, viz. to increase the drilling speed.
- WO 99/11900 discloses a rotary drill bit comprising a plurality of disc cutter formed on roller cones and arranged to cut a plurality of substantially circular, radially spaced cuts into the bottom of the borehole. The set of cutters of each roller cone is radially displaced relative to the set of cutters of another roller cone, so that for each pair of radially adjacent cutters a second one of the pair cuts into the borehole bottom at an angular interval behind the first one the pair. A body of rock material is defined between the respective cuts, which body is sheared off by the second cutter in the direction of the cut created by the first cutter.
- It was found that the rate of penetration (ROP) into the earth formation of the known drill bit is relatively low in certain types of rock formation, particularly in hard rock formations, due to a tendency of shearing-off of the body of rock material in the direction of the upper end of the cut created by the first cutter. Accordingly there is a need for an improved drill bit having an enhanced ROP when drilling in such rock types.
- In accordance with the invention there is provided a rotary drill bit for drilling a borehole in an earth formation, the drill bit comprising a first and a second disc cutter, each disc cutter being arranged to roll along the borehole bottom during rotation of the drill bit and thereby to cut respective first and second substantially circular, radially spaced cuts in the borehole bottom so that a body of rock material is defined between said cuts, the second disc cutter being arranged to cut into the bottom of the borehole at a selected rotational interval of the drill bit behind the first disc cutter and to shear-off said body of rock material in the direction of the first cut, wherein each disc cutter includes a set of mutually spaced cutting members arranged to create, during a turn of the drill bit, a corresponding set of cut sections of the cut created by the disc cutter, and wherein the cutting members are arranged so that the sets of cut sections created during subsequent drill bit turns are staggered relative to each other.
- By virtue of the feature that each disc cutter is formed of a set of discrete cutting members instead of the continuous disc cutter of the prior art, it is achieved that the instantaneous contact surface of the cutter with the borehole bottom is lower, leading to deeper penetration of the drill bit into the rock formation for a given weight on bit. Thus the cuts created by the cutters are deeper, and thereby shearing-off of the body of rock material tends to be more in the direction of the lower end of the first cut than in the direction of the upper end thereof as in the prior art.
- It will be appreciated that, since the disc cutter is no longer continuous, the full circumferential cut has to be created in a plurality of drill bit turns. This is achieved by dimensioning the drill bit so that the cutting members cut during a subsequent drill bit turn in the rock material between the cut sections created by the cutting members in a previous turn.
- The invention will now be described by way of example with reference to the accompanying drawings in which
- FIG. 1 schematically shows a bottom view of a drill bit according to the invention;
- FIG. 2 schematically shows a partial side view of the drill bit of FIG. 1;
- FIG. 3 schematically shows a bottom view of a roller cone of the drill bit of FIG. 1; and
- FIG. 4 schematically shows a transverse cross section of a borehole bottom during various stages of drilling with the drill bit of FIG. 1.
- In the Figures, like reference numerals relate to like elements.
- In FIG. 1 is shown a bottom view of a drill bit1 having a
bit body 3 and threeroller cones rotation 7 of the drill bit. The roller cones are rotatably connected to thebit body 3.Roller cone 4 is provided with a set ofdisc cutters roller cone 5 is provided with a set ofdisc cutters disc cutters disc cutter disc cutter respective roller cone - Referring further to FIG. 2, there is shown a partial side view of the drill bit1 and
roller cone 4. Theroller cones 5, 6 are not shown for reason of simplicity, however the portions ofcutters outermost cutters axis 7, i.e. these cutters are arranged at equal axial positions on therespective roller cones inner cutters respective roller cones cutter 5 b cuts into the borehole bottom at a radius in between the radii at whichcutters cutter 5 c cuts into the borehole bottom at a radius in between the radii at whichcutters cutter 6 b cuts into the borehole bottom at a radius in between the radii at whichcutters cutter 6 c cuts into the borehole bottom at a radius in between the radii at whichcutters - Each disc cutter has two
side surfaces respective side surfaces cutter side surfaces shaped cutting edge 14. Furthermore, eachside surface 12 extends perpendicular to the axis of rotation (indicated byreference numeral 16 for roller cone 4) of therespective roller cone drilling side surface 12 pushes against the rock in the direction of therotation axis 16.Side surface 20 extends parallel to the axis ofrotation 7 of the drill bit 1 at the point of contact with the borehole bottom. - As shown in FIGS. 2 and 3, each
disc cutter recesses 20 whereby the remaining portions of the disc cutter define a corresponding set of mutually spacedcutting members 22. For eachroller cone members 22 of adjacent cutters are arranged staggered relative to each other. - Each
roller cone cutting members 22 of each disc cutter of the roller cone create, during a turn of the drill bit 1, a set of cut sections (not shown) in the borehole bottom and that the sets of cut sections created during subsequent drill bit turns are rotationally displaced relative to each other. In other words, during a subsequent turn of the drill bit 1, thecutting members 22 of the disc cutter cut into the borehole bottom at locations not cut before by thecutting members 22 before. This implies that the complete circular cut is created by the disc cutter in a plurality of drill bit turns. - In case the
cutting members 22 are regularly spaced along circumference of the respective disc cutter, as is the case in the embodiment of the Figures, the desired dimensioning can be achieved if it is avoided that during a subsequent drill bit turn thecutting members 22 cut exactly in the same cuts as during previous turns. One way of achieving this is by avoiding the condition that L =i . T - in which
- L =circumferential length of the cut,
- i =
integer number - T=pitch of the cutting members.
- With T=π. d/n and L=π. D
- d being the rolling diameter of the disc cutter,
- n being number of cutting members of the disc cutter,
- D being the diameter of the cut created by the cutter,
- it follows that the drill bit is properly dimensioned if D/d =(i +f)/n.
- Preferably 0.3<f<0.7. If, for example, f is about 0.5 the full cut is created in about two drill bit turns.
- Suitably D and d are selected so that 1.5<D/d<2.
- In FIG. 3 is shown a bottom view of
roller cone 4 with indicated values of the angular extend of the cutting members (angular extend 32°) and the recesses (angular extend 28°). Also shown is the angular overlap of 2° of the cutting members ofdisc cutter 4 a with the cutting members ofdisc cutter 4 b. A similar angular overlap exists between the cutting members of therespective cutters - Furthermore the
roller cones conventional cutting inserts 26 atside surfaces 10 of theoutermost cutters - During normal operation the drill bit1 is rotated in the borehole, as a result of which the roller cones 4, 5, 6 roll and cut along the borehole bottom. The cutting action is described hereinafter for
cutters - Referring further to FIG. 4, the
cutters adjacent cuts 32, 34, 36 in the borehole bottom. These cuts are indicated as straight lines, however in practice the cuts will have a shape corresponding more or less to the section of the cutters penetrating the borehole bottom. Lines f, g, h, i, j indicate the respective envelopes of the lower ends of thedisc cutters - At rotation angle 120°
cutter 4 b has created cut 36 to level g. At rotation angle 240°cutter 5 b has created cut 34 to level h. A body ofrock material 38 a is thereby defined betweencut 36 at level h and cut 34 at level g, which body ofrock material 38 a is sheared byside surface 12 ofcutter 5 b along line s1 extending between therespective cuts 36, 34. - At rotation angle 360°
cutter 6 b has created cut 32 to level i, thereby defining a body ofrock material 38 b between cut 34 at level g and cut 32 at level i, which body ofrock material 38 b is sheared byside surface 12 ofcutter 6 b along line s2 extending between the respective cuts 34, 32. - At rotation angle 480°
cutter 5 b has created cut 34 to level j, thereby defining a body ofrock material 38 c betweencut 36 at level i and cut 34 at level j, which body ofrock material 38 c is sheared off byside surface 12 ofcutter 5 b along line s3 extending between therespective cuts 36, 34. - Similarly, after a further rotational angle of 120° a body of
rock material 38 d is defined between respective cuts 34 at level j and 32 at a still deeper level, which body ofrock material 38 d is sheared off byside surface 12 ofcutter 6 b along line s4 extending between therespective cuts 36, 34. - The
outer cutters cutter 5 b, in a manner similarly as described above. The cutting action ofcutters respective cutters - The discrete cutting sections created by the cutting
members 22 extend deeper into the borehole bottom than cuts which would have been created by continuous disc cutters (i.e. cutters without recesses) at equal weight on bit. Therefore the bodies of rock material, defined between adjacent cuts, have a larger size in the direction of penetration of the drill bit, so that the mere superficial cutting action during drilling in hard formations is avoided and thereby a more efficient drilling process is achieved.
Claims (11)
1. A rotary drill bit for drilling a borehole in an earth formation, the drill bit comprising a first and a second disc cutter, each disc cutter being arranged to roll along the borehole bottom during rotation of the drill bit and thereby to cut respective first and second substantially circular, radially spaced cuts in the borehole bottom so that a body of rock material is defined between said cuts, the second disc cutter being arranged to cut into the bottom of the borehole at a selected rotational interval of the drill bit behind the first disc cutter and to shear-off said body of rock material in the direction of the first cut, wherein each disc cutter includes a set of mutually spaced cutting members arranged to create, during a turn of the drill bit, a corresponding set of cut sections of the cut created by the disc cutter, and wherein the cutting members are arranged so that the sets of cut sections created during subsequent drill bit turns are staggered relative to each other.
2. The rotary drill bit of claim 1 , wherein the cutting members are substantially regularly spaced along the cutter, and wherein the drill bit is dimensioned so that
D/d=(i +f)/n
in which
D=diameter of the cut created by the cutter;
n=number of cutting members of the cutter;
d=rolling diameter of the cutter;
i=integer number 1, 2, 3, . . . etc.;
0<f<1.
3. The drill bit of claim 2 , wherein 0.3<f<0.7
4. The drill bit of claim 2 or 3, wherein f is about 0.5.
5. The drill bit of any one of claims 2-4, wherein 1.5<D/d<2.
6. The drill bit of any one of claims 1-5, wherein the drill bit includes a bit body and a plurality of roller cones rotatably connected to the bit body so as to substantially roll along the borehole bottom during rotation of the bit in the borehole and being oriented in different radial orientations, a first one of the roller cones being provided with the first disc cutter and a second one of the roller cones being provided with the second disc cutter.
7. The drill bit of claim 6 , wherein each roller cone is provided with a plurality of said disc cutters spaced along the axial direction of the roller cone, and wherein the sets of cutting members of adjacent disc cutters of the roller cone are arranged in a staggered relationship.
8. The drill bit of any one of claims 1-7, wherein for each disc cutter, each cutting member of the disc cutter extends along a section angle α of the disc cutter and each spacing between adjacent cutting members of the disc cutter extends along a section angle β of the disc cutter, and wherein α=β+δ and 0°<δ<4°.
9. The drill bit of claim 8 , wherein 1°<δ<3°, and preferably δ is about 2°.
10. The drill bit of any one of claims 1-9, wherein each set of cutting members is defined by a set of mutually spaced recesses formed in the disc cutter to which the set of cutting members pertains.
11. The drill bit substantially as described hereinbefore with reference to the drawings.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00203110.2 | 2000-09-08 | ||
EP00203110 | 2000-09-08 | ||
PCT/EP2001/010406 WO2002020936A2 (en) | 2000-09-08 | 2001-09-06 | Drill bit |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040020693A1 true US20040020693A1 (en) | 2004-02-05 |
Family
ID=8171995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/363,975 Abandoned US20040020693A1 (en) | 2000-09-08 | 2001-09-06 | Drill bit |
Country Status (13)
Country | Link |
---|---|
US (1) | US20040020693A1 (en) |
CN (1) | CN1304719C (en) |
AR (1) | AR030606A1 (en) |
AU (2) | AU2002212221B2 (en) |
BR (1) | BR0113687A (en) |
CA (1) | CA2421288A1 (en) |
EG (1) | EG22664A (en) |
GB (1) | GB2384505B (en) |
GC (1) | GC0000369A (en) |
MX (1) | MXPA03001924A (en) |
NO (1) | NO20031055D0 (en) |
OA (1) | OA12369A (en) |
WO (1) | WO2002020936A2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170342775A1 (en) * | 2016-05-25 | 2017-11-30 | Baker Hughes Incorporated | Roller cone earth-boring rotary drill bits including disk heels and related systems and methods |
US10036205B2 (en) * | 2015-06-04 | 2018-07-31 | The Charles Machine Works, Inc. | Stacked-plate reamer |
CN112041540A (en) * | 2018-02-20 | 2020-12-04 | 沙特阿拉伯石油公司 | Downhole well integrity reconstruction in the oil and gas industry |
US11739616B1 (en) | 2022-06-02 | 2023-08-29 | Saudi Arabian Oil Company | Forming perforation tunnels in a subterranean formation |
US11954800B2 (en) | 2021-12-14 | 2024-04-09 | Saudi Arabian Oil Company | Converting borehole images into three dimensional structures for numerical modeling and simulation applications |
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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 |
US3265139A (en) * | 1963-12-09 | 1966-08-09 | Continental Oil Co | Roller cone drill bit |
US3358782A (en) * | 1963-07-25 | 1967-12-19 | Bechem Karl Gunter | Cutting roller, in particular for roller-type enlarging bits |
US4187922A (en) * | 1978-05-12 | 1980-02-12 | Dresser Industries, Inc. | Varied pitch rotary rock bit |
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US2246418A (en) * | 1938-03-14 | 1941-06-17 | Union Oil Co | Art of well drilling |
AR016883A1 (en) * | 1997-08-28 | 2001-08-01 | Shell Int Research | A ROTARY TREPANE TO DRILL |
-
2001
- 2001-09-05 AR ARP010104211A patent/AR030606A1/en unknown
- 2001-09-05 GC GCP20011617 patent/GC0000369A/en active
- 2001-09-05 EG EG20010958A patent/EG22664A/en active
- 2001-09-06 BR BR0113687-9A patent/BR0113687A/en not_active Application Discontinuation
- 2001-09-06 AU AU2002212221A patent/AU2002212221B2/en not_active Ceased
- 2001-09-06 CN CNB018151892A patent/CN1304719C/en not_active Expired - Fee Related
- 2001-09-06 AU AU1222102A patent/AU1222102A/en active Pending
- 2001-09-06 CA CA002421288A patent/CA2421288A1/en not_active Abandoned
- 2001-09-06 MX MXPA03001924A patent/MXPA03001924A/en unknown
- 2001-09-06 OA OA1200300053A patent/OA12369A/en unknown
- 2001-09-06 US US10/363,975 patent/US20040020693A1/en not_active Abandoned
- 2001-09-06 WO PCT/EP2001/010406 patent/WO2002020936A2/en active IP Right Grant
- 2001-09-06 GB GB0304377A patent/GB2384505B/en not_active Expired - Fee Related
-
2003
- 2003-03-07 NO NO20031055A patent/NO20031055D0/en not_active Application Discontinuation
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US2333746A (en) * | 1940-07-11 | 1943-11-09 | Hughes Tool Co | Cutter teeth for well drills |
US2533258A (en) * | 1945-11-09 | 1950-12-12 | Hughes Tool Co | Drill cutter |
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 |
US3358782A (en) * | 1963-07-25 | 1967-12-19 | Bechem Karl Gunter | Cutting roller, in particular for roller-type enlarging bits |
US3265139A (en) * | 1963-12-09 | 1966-08-09 | Continental Oil Co | Roller cone drill bit |
US4187922A (en) * | 1978-05-12 | 1980-02-12 | Dresser Industries, Inc. | Varied pitch rotary rock bit |
US4298078A (en) * | 1979-01-12 | 1981-11-03 | Dailey Oil Tool, Inc. | Method of inhibiting sticking of well string |
US5111894A (en) * | 1990-08-23 | 1992-05-12 | Sybil J. Williams | Uninterrupted drill bit |
US5586611A (en) * | 1995-10-13 | 1996-12-24 | Cypress Services, Inc. | Drill bit having dual split bushings for cutter support and retention |
US6808027B2 (en) * | 2001-06-11 | 2004-10-26 | Rst (Bvi), Inc. | Wellbore directional steering tool |
US20030136588A1 (en) * | 2002-01-24 | 2003-07-24 | David Truax | Roller cone drill bit having designed walk characteristics |
US20050194183A1 (en) * | 2004-03-04 | 2005-09-08 | Gleitman Daniel D. | Providing a local response to a local condition in an oil well |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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US10036205B2 (en) * | 2015-06-04 | 2018-07-31 | The Charles Machine Works, Inc. | Stacked-plate reamer |
US10538969B2 (en) | 2015-06-04 | 2020-01-21 | The Charles Machine Works, Inc. | Stacked-plate reamer |
US20170342775A1 (en) * | 2016-05-25 | 2017-11-30 | Baker Hughes Incorporated | Roller cone earth-boring rotary drill bits including disk heels and related systems and methods |
US10689911B2 (en) * | 2016-05-25 | 2020-06-23 | Baker Hughes, A Ge Company, Llc | Roller cone earth-boring rotary drill bits including disk heels and related systems and methods |
CN112041540A (en) * | 2018-02-20 | 2020-12-04 | 沙特阿拉伯石油公司 | Downhole well integrity reconstruction in the oil and gas industry |
US11624251B2 (en) | 2018-02-20 | 2023-04-11 | Saudi Arabian Oil Company | Downhole well integrity reconstruction in the hydrocarbon industry |
US11954800B2 (en) | 2021-12-14 | 2024-04-09 | Saudi Arabian Oil Company | Converting borehole images into three dimensional structures for numerical modeling and simulation applications |
US11739616B1 (en) | 2022-06-02 | 2023-08-29 | Saudi Arabian Oil Company | Forming perforation tunnels in a subterranean formation |
Also Published As
Publication number | Publication date |
---|---|
MXPA03001924A (en) | 2004-02-12 |
GB2384505A (en) | 2003-07-30 |
NO20031055L (en) | 2003-03-07 |
CN1452685A (en) | 2003-10-29 |
GB2384505B (en) | 2005-01-12 |
GC0000369A (en) | 2007-03-31 |
NO20031055D0 (en) | 2003-03-07 |
WO2002020936A3 (en) | 2002-05-16 |
CA2421288A1 (en) | 2002-03-14 |
AU1222102A (en) | 2002-03-22 |
WO2002020936A2 (en) | 2002-03-14 |
OA12369A (en) | 2006-04-17 |
BR0113687A (en) | 2003-07-15 |
AR030606A1 (en) | 2003-08-27 |
EG22664A (en) | 2003-05-31 |
AU2002212221B2 (en) | 2004-11-11 |
GB0304377D0 (en) | 2003-04-02 |
CN1304719C (en) | 2007-03-14 |
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Legal Events
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---|---|---|---|
AS | Assignment |
Owner name: SHELL OIL COMPANY, TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DAMHOF, FREDERIK-;ZIJSLING, DJURRE,HANS-;REEL/FRAME:014284/0579;SIGNING DATES FROM 20011031 TO 20011115 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |