CA2509854A1 - A rotating dry drilling bit - Google Patents
A rotating dry drilling bit Download PDFInfo
- Publication number
- CA2509854A1 CA2509854A1 CA 2509854 CA2509854A CA2509854A1 CA 2509854 A1 CA2509854 A1 CA 2509854A1 CA 2509854 CA2509854 CA 2509854 CA 2509854 A CA2509854 A CA 2509854A CA 2509854 A1 CA2509854 A1 CA 2509854A1
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- Prior art keywords
- bit
- annulus
- radially extending
- tip
- dry drilling
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- 238000005553 drilling Methods 0.000 title claims abstract 49
- 238000005520 cutting process Methods 0.000 claims abstract 68
- 229910000831 Steel Inorganic materials 0.000 claims abstract 19
- 239000010959 steel Substances 0.000 claims abstract 19
- 239000011435 rock Substances 0.000 claims abstract 18
- 239000011159 matrix material Substances 0.000 claims abstract 5
- 239000002184 metal Substances 0.000 claims abstract 5
- 238000005272 metallurgy Methods 0.000 claims abstract 5
- 238000000034 method Methods 0.000 claims abstract 5
- 239000010432 diamond Substances 0.000 claims abstract 4
- 230000008878 coupling Effects 0.000 claims 4
- 238000010168 coupling process Methods 0.000 claims 4
- 238000005859 coupling reaction Methods 0.000 claims 4
- 230000000087 stabilizing effect Effects 0.000 claims 4
- 230000007704 transition Effects 0.000 claims 4
- 230000003467 diminishing effect Effects 0.000 claims 2
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
- E21B10/02—Core bits
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
A rotating dry drilling bit for low thrust drilling of an annular bore hole into a body of rock and obtaining an extremely small diameter core sample comprises a bit crown moulded to the end of an annular steel body. The bit crown comprises a plurality of radially extending channels and a plurality of evenly spaced radially extending cutting blades surrounding an annulus. The bit crown is a hard metal matrix formed onto the bottom end of the annular steel body using a powdered metallurgy process. Embedded within each cutting blade are natural and synthetic diamonds. A reverse auger mechanism within the annulus removes cuttings from the annulus and the surface of the bit crown.
Claims (40)
1. A rotating dry drilling bit for drilling an annular bore hole into a body of rock and obtaining a core sample from said body of rock, said rotating dry drilling bit comprising:
a. an annular steel body having a first annulus, a first inside diameter, a bottom end and a top end, said top end adapted for coupling with a rotating drill string, said drill string having an second annulus with a second inside diameter;
b. a bit crown mounted to said annular steel body bottom end, wherein said bit crown has a top end and a bottom end and comprises:
i. a third annulus having a third inside diameter, a bottom rim and a top rim, said third annulus extending through said bit crown, wherein the third annulus is co-axial with said first and second annuli and adapted to receive and pass said core sample to the annular steel body first annulus and hence to the drill string second annulus;
ii. a bit head having a radial profile for rotatively cutting into said body of rock thereby forming the core sample and creating cuttings;
iii. a radial outer face integral to and above said bit head, said radial outer face having a vertical profile and adapted for stabilizing the bit head against angular deviation and gauging said annular bore hole;
iv. a plurality of radially extending channels formed therein and evenly spaced thereabout and adapted for carrying said cuttings away from the bit head;
v. a plurality of radially extending cutting blades formed therein and evenly spaced thereabout wherein each one of said plurality of radially extending cutting blades is separated by one of said plurality of radially extending channels; and, c. a transition zone adapted for receiving the cuttings from the plurality of channels.
a. an annular steel body having a first annulus, a first inside diameter, a bottom end and a top end, said top end adapted for coupling with a rotating drill string, said drill string having an second annulus with a second inside diameter;
b. a bit crown mounted to said annular steel body bottom end, wherein said bit crown has a top end and a bottom end and comprises:
i. a third annulus having a third inside diameter, a bottom rim and a top rim, said third annulus extending through said bit crown, wherein the third annulus is co-axial with said first and second annuli and adapted to receive and pass said core sample to the annular steel body first annulus and hence to the drill string second annulus;
ii. a bit head having a radial profile for rotatively cutting into said body of rock thereby forming the core sample and creating cuttings;
iii. a radial outer face integral to and above said bit head, said radial outer face having a vertical profile and adapted for stabilizing the bit head against angular deviation and gauging said annular bore hole;
iv. a plurality of radially extending channels formed therein and evenly spaced thereabout and adapted for carrying said cuttings away from the bit head;
v. a plurality of radially extending cutting blades formed therein and evenly spaced thereabout wherein each one of said plurality of radially extending cutting blades is separated by one of said plurality of radially extending channels; and, c. a transition zone adapted for receiving the cuttings from the plurality of channels.
2. The dry drilling bit as claimed in claim 1, wherein said annular steel body is machined from C12L14 steel.
3. The dry drilling bit as claimed in claim 2 wherein the bit crown is a hard metal matrix formed onto the bottom end of the annular steel body using a powdered metallurgy process.
4. The dry drilling bit as claimed in claim 3, wherein the radial outer face includes a plurality of vertically oriented and parallel splines embedded therein, each of said splines having a radial surface.
5. The dry drilling bit as claimed in claim 4, wherein said third annulus top rim is characterized by a projection having a inwardly oriented tip thereby defining the third annulus top rim diameter from said tip to the opposite side of the rim to the diameter of the core sample.
6. The rotating dry drilling bit as claimed in claim 5, wherein said projection applies tension to the core sample causing it to separate from the body of rock.
7. The rotating dry drilling bit as claimed in claim 6, wherein each radially extending cutting blade of said plurality of radially extending cutting blades has a bottom tip and a top tip, and wherein first bottom tip extends radially downward into the third annulus a predetermine distance.
8. The rotating dry drilling bit as claimed in claim 7, wherein each radially extending channel of said plurality of radially extending channels has a bottom tip and a top tip, and wherein said channel bottom tip terminates at said bottom rim.
9. The rotating dry drilling bit as claimed in claim 8, wherein a junk pocket is formed above the projection and between the projection and the bottom of the adjacent radially extending cutting blade, said junk pocket adapted for collecting cuttings within the third aperture.
10. The rotating dry drilling bit as claimed in claim 9 further including means for removing cuttings from the third aperture.
11. The rotating dry drilling bit as claimed in claim 10, wherein said means for removing cuttings comprises:
a. a plurality of radially spaced auger blades fixed to the bottom inside surface of the third annulus, wherein each of said plurality of radially spaced auger blades has an attacking surface, a bottom end and a top end, and further wherein the bottom end of each of said plurality of radially spaced auger blades is adjacent to a corresponding bottom tip of each of said plurality of radially extending cutting blades, and wherein each auger blade of said plurality of radially spaced auger blades is oriented diagonally across the width of each radially extending channel of said plurality of radially extending channels; and, b. a row of evenly spaced abrasive elements adjacent and parallel to the attacking surface of each blade of said plurality of radially spaced auger blades;
so that in operation, as the dry drill bit is rotating, the auger blades sweep the cuttings from the third annulus into an adjacent radially extending channel for carriage by centrifugal force away from the bit head.
a. a plurality of radially spaced auger blades fixed to the bottom inside surface of the third annulus, wherein each of said plurality of radially spaced auger blades has an attacking surface, a bottom end and a top end, and further wherein the bottom end of each of said plurality of radially spaced auger blades is adjacent to a corresponding bottom tip of each of said plurality of radially extending cutting blades, and wherein each auger blade of said plurality of radially spaced auger blades is oriented diagonally across the width of each radially extending channel of said plurality of radially extending channels; and, b. a row of evenly spaced abrasive elements adjacent and parallel to the attacking surface of each blade of said plurality of radially spaced auger blades;
so that in operation, as the dry drill bit is rotating, the auger blades sweep the cuttings from the third annulus into an adjacent radially extending channel for carriage by centrifugal force away from the bit head.
12. The rotating dry drilling bit as claimed in claim 11, wherein each radially extending cutting blade of the plurality of radially extending cutting blades has a blade surface area diminishing tapered width from the bottom tip to the top tip thereof.
13. The rotating dry drilling bit as claimed in claim 12, wherein each radially extending channel of the plurality of radially extending channels has a channel surface area and a diminishing tapered width from the top tip to the bottom tip thereof.
14. The rotating dry drilling bit as claimed in claim 13, wherein each radially extending cutting blade of the plurality of radially extending cutting blades and each radially extending channel of the plurality of radially extending channels have a diagonal orientation conforming to the direction of rotation of the rotating dry drill bit.
15. The rotating dry drilling bit as claimed in claim 14, wherein said blade surface is raised above the channel surface thereby creating blade surface opposite side walls comprising a blade surface leading side wall and a blade surface lagging side wall.
16. The rotating dry drilling bit as claimed in claim 15, wherein said blade surface leading side wall and said blade surface lagging side wall are angled at a predetermined angle towards the direction of rotation of the dry drilling bit.
17. The rotating dry drilling bit as claimed in claim 16, wherein a plurality of abrasive elements is inserted into the blade surface.
18. The rotating dry drilling bit as claimed in claim 17, wherein said plurality of abrasive elements comprise natural diamonds.
19. The rotating dry drilling bit as claimed in claim 17, wherein said plurality of abrasive elements comprises synthetic diamonds.
20. The rotating dry drilling bit as claimed in claim 17, wherein the plurality of abrasive elements comprises a combination of natural and synthetic diamonds.
21. The rotating dry drilling bit as claimed in claim 17, 18 and 19, wherein a row of abrasive elements is inserted into said radial surface of each of said splines.
22. A rotating dry drilling bit for drilling an annular bore hole into a body of rock and obtaining a core sample from said body of rock, said rotating dry drill bit comprising:
a. an annular steel body having a first annulus, a first inside diameter, a bottom end and a top end, said top end adapted for coupling with a rotating drill string, said drill string having an second annulus with a second inside diameter;
b. a bit crown comprising a hard metal matrix formed onto said bottom end of said annular steel body using a powdered metallurgy process, wherein said bit crown has a top end and a bottom end and comprises:
i. a third annulus having a third inside diameter, a bottom rim and a top rim, said third annulus extending through said bit crown, wherein the third annulus is co-axial with said first and second annuli and adapted to receive and pass said core sample to the annular steel body first annulus and hence to the drill string second annulus;
ii. a bit head having a radial profile for rotatively cutting into the body of rock thereby forming the core sample and creating cuttings;
iii. a plurality of tapered radially extending channels formed therein and evenly spaced thereabout and adapted for carrying said cuttings away from the bit head;
iv. a plurality of tapered radially extending cutting blades formed therein and evenly spaced thereabout wherein each one of said plurality of radially extending cutting blades is separated by one of said plurality of radially extending channels; and, v. a plurality of radial outer faces adjacent to and above said bit head, wherein:
1. each radial outer face of said plurality of radial outer faces is integral to an adjacent radially extending cutting blade;
2. the plurality of radial outer faces is adapted for stabilizing the bit head against angular deviation and gauging said bore hole;
3. each radial outer face of said plurality of radial outer faces comprises a plurality of vertically oriented and parallel splines embedded therein;
4. each radial outer face of said plurality of radial outer faces deviates a predetermined angle from its adjacent tapered radially extending cutting blade; and, c. a transition zone adapted for receiving the cuttings from the plurality of tapered radially extending channels, wherein said transitional zone is integral to and above the bit crown and comprises a vertical surface extending at a predetermined angle from the top of the radial outer face to the surface of the annular steel body, so that the transitional zone receives cuttings from the plurality of channels and transfers them to an auguring means located above the transitional zone for transport out of the bore hole.
a. an annular steel body having a first annulus, a first inside diameter, a bottom end and a top end, said top end adapted for coupling with a rotating drill string, said drill string having an second annulus with a second inside diameter;
b. a bit crown comprising a hard metal matrix formed onto said bottom end of said annular steel body using a powdered metallurgy process, wherein said bit crown has a top end and a bottom end and comprises:
i. a third annulus having a third inside diameter, a bottom rim and a top rim, said third annulus extending through said bit crown, wherein the third annulus is co-axial with said first and second annuli and adapted to receive and pass said core sample to the annular steel body first annulus and hence to the drill string second annulus;
ii. a bit head having a radial profile for rotatively cutting into the body of rock thereby forming the core sample and creating cuttings;
iii. a plurality of tapered radially extending channels formed therein and evenly spaced thereabout and adapted for carrying said cuttings away from the bit head;
iv. a plurality of tapered radially extending cutting blades formed therein and evenly spaced thereabout wherein each one of said plurality of radially extending cutting blades is separated by one of said plurality of radially extending channels; and, v. a plurality of radial outer faces adjacent to and above said bit head, wherein:
1. each radial outer face of said plurality of radial outer faces is integral to an adjacent radially extending cutting blade;
2. the plurality of radial outer faces is adapted for stabilizing the bit head against angular deviation and gauging said bore hole;
3. each radial outer face of said plurality of radial outer faces comprises a plurality of vertically oriented and parallel splines embedded therein;
4. each radial outer face of said plurality of radial outer faces deviates a predetermined angle from its adjacent tapered radially extending cutting blade; and, c. a transition zone adapted for receiving the cuttings from the plurality of tapered radially extending channels, wherein said transitional zone is integral to and above the bit crown and comprises a vertical surface extending at a predetermined angle from the top of the radial outer face to the surface of the annular steel body, so that the transitional zone receives cuttings from the plurality of channels and transfers them to an auguring means located above the transitional zone for transport out of the bore hole.
23. The dry drilling bit as claimed in claim 22, wherein said third annulus top rim is characterized by a projection having a variable length and an inwardly oriented tip extending a predetermined distance into the third annulus thereby reducing the third annulus top rim diameter from said tip to the opposite side of the rim to the diameter of the core sample, wherein said projection is in sliding contact with the core sample, applies tension to the core sample thereby causing it to separate from the body of rock and gauges the core sample.
24. The rotating dry drilling bit as claimed in claim 23, wherein each tapered radially extending cutting blade of said plurality of tapered radially extending cutting blades has a first bottom tip and a second top tip, and wherein said first bottom tip extends horizontally across the third annulus a distance equal to said predetermine distance.
25. The rotating dry drilling bit as claimed in claim 24, wherein each tapered radially extending channel of said plurality of tapered radially extending channels has a bottom tip and a top tip, and wherein said channel bottom tip terminates at said bottom rim.
26. The rotating dry drilling bit as claimed in claim 25, wherein the diameter of the core sample is determined by the distance between the opposite top tips of the plurality of tapered radially extending cutting blades.
27. The rotating dry drilling bit as claimed in claim 26, wherein a junk pocket is formed above the projection and between the projection and the bottom of the adjacent tapered radially extending cutting blade, said junk pocket adapted for collecting cuttings within the third aperture.
28. The rotating dry drilling bit as claimed in claim 27 further including means for removing cuttings from the third aperture.
29. The rotating dry drilling bit as claimed in claim 28, wherein said means for removing cuttings from the third aperture comprises:
a. a plurality of radially spaced auger blades diagonally oriented counter-rotationally and fixed to the bottom inside surface of the third annulus, wherein each of said plurality of radially spaced auger blades has an attacking surface, a bottom end and a top end, and further wherein the bottom end of each of said plurality of radially spaced auger blades terminates at the top rim of the third annulus; and, b. a row of evenly spaced abrasive elements adjacent and parallel to the attacking surface of each blade of said plurality of radially spaced auger blades so that in operation, as the dry drill bit is rotating, said row of evenly spaced abrasive elements crushes the cuttings whereupon each radially spaced auger element of the plurality of radially spaced auger elements sweeps the cuttings from the third annulus into an adjacent radially extending channel for carriage by centrifugal force away from the bit head.
a. a plurality of radially spaced auger blades diagonally oriented counter-rotationally and fixed to the bottom inside surface of the third annulus, wherein each of said plurality of radially spaced auger blades has an attacking surface, a bottom end and a top end, and further wherein the bottom end of each of said plurality of radially spaced auger blades terminates at the top rim of the third annulus; and, b. a row of evenly spaced abrasive elements adjacent and parallel to the attacking surface of each blade of said plurality of radially spaced auger blades so that in operation, as the dry drill bit is rotating, said row of evenly spaced abrasive elements crushes the cuttings whereupon each radially spaced auger element of the plurality of radially spaced auger elements sweeps the cuttings from the third annulus into an adjacent radially extending channel for carriage by centrifugal force away from the bit head.
30. A rotating dry drilling bit for drilling an annular bore hole into a body of rock and obtaining a core sample from said body of rock, said rotating dry drill bit comprising:
a. an annular steel body having a first annulus, a first inside diameter, a bottom end and a top end, said top end adapted for coupling with a rotatable drill string, said drill string having an second annulus with a second inside diameter;
b. a bit crown comprising a hard metal matrix formed onto said bottom end of said annular steel body using a powdered metallurgy process, wherein said bit crown has a top end and a bottom end and comprises:
i. a third annulus having a third inside diameter, a bottom rim and a top rim, said third annulus extending through said bit crown, wherein the third annulus is co-axial with said first and second annuli and adapted to receive and pass said core sample to the annular steel body first annulus and hence to the drill string second annulus;
ii. a bit head having a radial profile for rotatively cutting into the body of rock thereby forming the core sample and creating cuttings;
iii. a plurality of radially extending channels formed therein and evenly spaced thereabout, said channels having a surface area, a bottom tip and a top tip and adapted for carrying said cuttings away from the bit head, wherein said plurality of radially extending channels have a constant width from said top tip to said bottom tip;
iv. a plurality of radially extending cutting blades formed therein and evenly spaced thereabout, said plurality of radially extending cutting blades having a surface area, a bottom tip and a top tip, wherein the width of each cutting blade of the plurality of cutting blades is consistent from said bottom tip to said top tip, wherein each one of said plurality of radially extending cutting blades is separated by one of said plurality of radially extending channels;
and, v. a plurality of radial outer faces adjacent to and above said bit head, wherein:
1. each radial outer face of said plurality of radial outer faces is integral to an adjacent radially extending cutting blade;
2. the plurality of radial outer faces is adapted for stabilizing the bit head against angular deviation and gauging said bore hole;
3. each radial outer face of said plurality of radial outer faces comprises a plurality of vertically oriented and parallel splines embedded therein; and, c. a transition zone adapted for receiving the cuttings from the plurality of tapered radially extending channels, wherein said transitional zone is integral to and above the bit crown and comprises an vertical surface extending at a predetermined angle from the top of the radial outer face to the surface of the annular steel body, so that the transitional zone receives cuttings from the plurality of channels and transfers them to an auguring means located above the transitional zone for transport out of the bore hole.
a. an annular steel body having a first annulus, a first inside diameter, a bottom end and a top end, said top end adapted for coupling with a rotatable drill string, said drill string having an second annulus with a second inside diameter;
b. a bit crown comprising a hard metal matrix formed onto said bottom end of said annular steel body using a powdered metallurgy process, wherein said bit crown has a top end and a bottom end and comprises:
i. a third annulus having a third inside diameter, a bottom rim and a top rim, said third annulus extending through said bit crown, wherein the third annulus is co-axial with said first and second annuli and adapted to receive and pass said core sample to the annular steel body first annulus and hence to the drill string second annulus;
ii. a bit head having a radial profile for rotatively cutting into the body of rock thereby forming the core sample and creating cuttings;
iii. a plurality of radially extending channels formed therein and evenly spaced thereabout, said channels having a surface area, a bottom tip and a top tip and adapted for carrying said cuttings away from the bit head, wherein said plurality of radially extending channels have a constant width from said top tip to said bottom tip;
iv. a plurality of radially extending cutting blades formed therein and evenly spaced thereabout, said plurality of radially extending cutting blades having a surface area, a bottom tip and a top tip, wherein the width of each cutting blade of the plurality of cutting blades is consistent from said bottom tip to said top tip, wherein each one of said plurality of radially extending cutting blades is separated by one of said plurality of radially extending channels;
and, v. a plurality of radial outer faces adjacent to and above said bit head, wherein:
1. each radial outer face of said plurality of radial outer faces is integral to an adjacent radially extending cutting blade;
2. the plurality of radial outer faces is adapted for stabilizing the bit head against angular deviation and gauging said bore hole;
3. each radial outer face of said plurality of radial outer faces comprises a plurality of vertically oriented and parallel splines embedded therein; and, c. a transition zone adapted for receiving the cuttings from the plurality of tapered radially extending channels, wherein said transitional zone is integral to and above the bit crown and comprises an vertical surface extending at a predetermined angle from the top of the radial outer face to the surface of the annular steel body, so that the transitional zone receives cuttings from the plurality of channels and transfers them to an auguring means located above the transitional zone for transport out of the bore hole.
31. The rotating dry drilling bit as claimed in claim 30, wherein each one of the plurality of radially extending cutting blades and each one of the radially extending channels is oriented diagonally at an predetermined angle away from the vertical and towards the direction of rotation.
32. The dry drilling bit as claimed in claim 31, wherein said third annulus top rim is characterized by a projection having a variable length and an inwardly oriented tip extending a predetermined distance into the third annulus thereby defining the third annulus top rim diameter from said tip to the opposite side of the rim to the diameter of the core sample, wherein said projection is in sliding contact with the core sample, applies tension to the core sample thereby causing it to separate from the body of rock and gauges the core sample.
33. The rotating dry drilling bit as claimed in claim 32, wherein each tapered radially extending cutting blade of said plurality of tapered radially extending cutting blades has a bottom tip and a top tip, and wherein said bottom tip extends horizontally across the third annulus a distance equal to said predetermine distance.
34. The rotating dry drilling bit as claimed in claim 33, wherein each tapered radially extending channel of said plurality of tapered radially extending channels has a bottom tip and a top tip, and wherein said channel bottom tip terminates at said bottom rim.
35. The rotating dry drilling bit as claimed in claim 34, wherein the diameter of the core sample is determined by the distance between the opposite top tips of the plurality of tapered radially extending cutting blades.
36. The rotating dry drilling bit as claimed in claim 35, wherein a pocket is formed above the projection and between the projection and the bottom of the adjacent tapered radially extending cutting blade, said pocket adapted for collecting cuttings within the third aperture.
37. The rotating dry drilling bit as claimed in claim 36 further including means for removing cuttings from the third aperture.
38. The rotating dry drilling bit as claimed in claim 37, wherein said means comprises:
a. a plurality of radially spaced auger blades diagonally oriented counter-rotationally and fixed to the bottom inside surface of the third annulus, wherein each of said plurality of radially spaced auger blades has an attacking surface, a bottom end and a top end, and further wherein the bottom end of each of said plurality of radially spaced auger blades terminates at the top rim of the third annulus; and, b. a row of evenly spaced abrasive elements adjacent and parallel to the attacking surface of each blade of said plurality of radially spaced auger blades;
so that in operation, as the dry drill bit is rotating, said row of evenly spaced abrasive elements crushes the cuttings whereupon each radially spaced auger element of the plurality of radially spaced auger elements sweeps the cuttings from the third annulus into an adjacent radially extending channel for carriage by centrifugal force away from the bit head.
a. a plurality of radially spaced auger blades diagonally oriented counter-rotationally and fixed to the bottom inside surface of the third annulus, wherein each of said plurality of radially spaced auger blades has an attacking surface, a bottom end and a top end, and further wherein the bottom end of each of said plurality of radially spaced auger blades terminates at the top rim of the third annulus; and, b. a row of evenly spaced abrasive elements adjacent and parallel to the attacking surface of each blade of said plurality of radially spaced auger blades;
so that in operation, as the dry drill bit is rotating, said row of evenly spaced abrasive elements crushes the cuttings whereupon each radially spaced auger element of the plurality of radially spaced auger elements sweeps the cuttings from the third annulus into an adjacent radially extending channel for carriage by centrifugal force away from the bit head.
39. A rotating dry drilling bit for drilling an annular bore hole into a body of rock and obtaining a core sample from said body of rock, said rotating dry drill bit comprising:
a. an annular steel body having a first annulus, a first inside diameter, a bottom end and a top end, said top end adapted for coupling with a rotatable drill string, said drill string having an second annulus with a second inside diameter;
b. a bit crown comprising a hard metal matrix formed onto said bottom end of said annular steel body using a powdered metallurgy process, wherein said bit crown has a top end and a bottom end and comprises:
i. a third annulus having a third inside diameter, a bottom rim and a top rim, said third annulus extending through said bit crown, wherein the third annulus is co-axial with said first and second annuli and adapted to receive and pass said core sample to the annular steel body first annulus and hence to the drill string second annulus;
ii. a bit head for rotatively cutting into the body of rock thereby forming the core sample and creating cuttings, said bit head comprising a plurality of cutting elements having a cylindrical shape, a diameter, a thickness, a flat circular attacking face having a circumference and a lagging face, wherein said attacking face has a cutting edge which will engage the body of rock about said circumference;
iii. an opening between each of said plurality of cutting elements, wherein said opening is adapted to remove cuttings away from the bit head;
iv. a plurality of radial outer faces integral to the bit crown and disposed above the plurality of cutting elements, wherein said outer faces are adapted for stabilizing the bit head against angular deviation and gauging said bore hole;
and, c. a transition zone adapted for receiving said cuttings from the openings for transport away from the bit crown.
a. an annular steel body having a first annulus, a first inside diameter, a bottom end and a top end, said top end adapted for coupling with a rotatable drill string, said drill string having an second annulus with a second inside diameter;
b. a bit crown comprising a hard metal matrix formed onto said bottom end of said annular steel body using a powdered metallurgy process, wherein said bit crown has a top end and a bottom end and comprises:
i. a third annulus having a third inside diameter, a bottom rim and a top rim, said third annulus extending through said bit crown, wherein the third annulus is co-axial with said first and second annuli and adapted to receive and pass said core sample to the annular steel body first annulus and hence to the drill string second annulus;
ii. a bit head for rotatively cutting into the body of rock thereby forming the core sample and creating cuttings, said bit head comprising a plurality of cutting elements having a cylindrical shape, a diameter, a thickness, a flat circular attacking face having a circumference and a lagging face, wherein said attacking face has a cutting edge which will engage the body of rock about said circumference;
iii. an opening between each of said plurality of cutting elements, wherein said opening is adapted to remove cuttings away from the bit head;
iv. a plurality of radial outer faces integral to the bit crown and disposed above the plurality of cutting elements, wherein said outer faces are adapted for stabilizing the bit head against angular deviation and gauging said bore hole;
and, c. a transition zone adapted for receiving said cuttings from the openings for transport away from the bit crown.
40. The rotating dry drilling bit as claimed in claim 39, wherein the cutting elements are oriented at a predetermined rake angle so that each of said attacking faces is angled to attack the body of rock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2509854 CA2509854C (en) | 2005-06-13 | 2005-06-13 | A rotating dry drilling bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2509854 CA2509854C (en) | 2005-06-13 | 2005-06-13 | A rotating dry drilling bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2509854A1 true CA2509854A1 (en) | 2006-12-13 |
| CA2509854C CA2509854C (en) | 2009-11-17 |
Family
ID=37545749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2509854 Expired - Fee Related CA2509854C (en) | 2005-06-13 | 2005-06-13 | A rotating dry drilling bit |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2509854C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011081775A1 (en) | 2009-12-15 | 2011-07-07 | Longyear Tm, Inc. | Drill bits with axially-tapered waterways |
| CN110043302A (en) * | 2019-05-28 | 2019-07-23 | 河南发恩德矿业有限公司 | A kind of only safe and efficient construction method of head development end vent (-escape) raise of long range |
-
2005
- 2005-06-13 CA CA 2509854 patent/CA2509854C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011081775A1 (en) | 2009-12-15 | 2011-07-07 | Longyear Tm, Inc. | Drill bits with axially-tapered waterways |
| EP2513405A1 (en) * | 2009-12-15 | 2012-10-24 | Longyear TM, Inc. | Drill bits with axially-tapered waterways |
| EP2513405A4 (en) * | 2009-12-15 | 2017-03-29 | Longyear TM, Inc. | Drill bits with axially-tapered waterways |
| CN110043302A (en) * | 2019-05-28 | 2019-07-23 | 河南发恩德矿业有限公司 | A kind of only safe and efficient construction method of head development end vent (-escape) raise of long range |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2509854C (en) | 2009-11-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20150615 |