WO2007065099B1 - Roof drilling system improvements - Google Patents
Roof drilling system improvementsInfo
- Publication number
- WO2007065099B1 WO2007065099B1 PCT/US2006/061329 US2006061329W WO2007065099B1 WO 2007065099 B1 WO2007065099 B1 WO 2007065099B1 US 2006061329 W US2006061329 W US 2006061329W WO 2007065099 B1 WO2007065099 B1 WO 2007065099B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heavy duty
- drill bit
- section
- shank
- reamer
- Prior art date
Links
- 238000005553 drilling Methods 0.000 title claims abstract 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract 25
- 239000010959 steel Substances 0.000 claims abstract 25
- 238000000034 method Methods 0.000 claims abstract 8
- 239000011435 rock Substances 0.000 claims abstract 6
- 230000015572 biosynthetic process Effects 0.000 claims abstract 4
- 238000005755 formation reaction Methods 0.000 claims abstract 4
- 239000011159 matrix material Substances 0.000 claims abstract 4
- 235000012431 wafers Nutrition 0.000 claims abstract 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims 8
- 229910000599 Cr alloy Inorganic materials 0.000 claims 4
- 229910000990 Ni alloy Inorganic materials 0.000 claims 4
- 239000000788 chromium alloy Substances 0.000 claims 4
- 239000012530 fluid Substances 0.000 claims 4
- 238000011010 flushing procedure Methods 0.000 claims 3
- 239000010410 layer Substances 0.000 claims 3
- 229910052751 metal Inorganic materials 0.000 claims 3
- 239000002184 metal Substances 0.000 claims 3
- 229910052755 nonmetal Inorganic materials 0.000 claims 3
- 230000000295 complement effect Effects 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 2
- 238000005299 abrasion Methods 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 239000000956 alloy Substances 0.000 claims 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims 1
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 229910001120 nichrome Inorganic materials 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 claims 1
- 238000004513 sizing Methods 0.000 claims 1
- 239000002344 surface layer Substances 0.000 claims 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims 1
- 229910000851 Alloy steel Inorganic materials 0.000 abstract 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
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
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
-
- 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
- E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
Abstract
The invention is embodied in a heavy duty drill bit for hard/soft rock drilling comprising a high fatigue-resistant, high alloy steel bit body having a PCD cutter member (220) and an enlarged shank portion (216) constructed to accommodate torsional forces at high thrust pressures, and reamer means (225) for compensating the effect of bore hole rifling. The invention further involves the method of forming a roof bolting matrix in extremely hard rock formations having a compression strength up to about 50,000 psi using PCD wafers (220) on a high tensile strength steel body coupled by a heavy duty shank (216) through high fatigue-resistant reamer means (225) to a high strength drive steel member.
Claims
AMENDED CLAIMS received by the International Bureau on 25 February 2008 (25.02.08)
1. A heavy duty drill tool for performing a sequential series of roof boring operations for a roof bolting matrix in metal/non-metal mines, comprising: a drill bit section having a high fatigue-resistant steel body constructed and arranged with PCD cutter inserts for forming a bore hole diameter up to about 2 1/4 inches, said PCD cutter inserts being disc-shaped wafers and having a thickness up to about 0.290 inches, and said steel body including a heavy duty shank constructed for connecting the drill bit sections said shank having a connecting dimension in the range of 9/16 to 3/4 inch; and a reamer section having a high fatigue-resistant steel body constructed and arranged with a cutting insert and being secured to the heavy duty shank to thereby form a coupler means for connecting the drill bit section to a drilling apparatus set at optimum drilling parameters for hard/soft rock formations.
2. The heavy duty drill tool of claim 1, in which said high fatigue-resistant steel body of at least one of said drill bit section and said reamer section is formed of a high nickel/chromium alloy characterized by a tensile strength in the range of 17S8OOO to 225,000 psi and a yield strength in the range of 135,000 to 145,000 psi.
3. The heavy duty drill tool of claim 1, in which the steel bodies of both said drill bit section and said reamer section are formed of 4340 steel having a tensile strength of about 210,000 psi and a yield strength of about 141,000 psi.
4. The heavy duty drill tool of claim 1, in which said PCD cutter inserts have front wear surfaces facing in the direction of rotation, and have arcuate upper cutting edges, and arcuate lower margins; said steel body being formed with arcuate support ledges complementary to the lower margins of the PCD cutter inserts to seat and support the PCD cutter inserts against maximum compressive drilling forces exerted against the upper cutting edges
5. The heavy duty drill tool of claim 4, including means for delivering flushing fluid across the wear surfaces of said PCD cutter inserts comprising a vertically-orienced
flute formed along the outside side of the shank and an angularly related channel in the side of the drill bit head portion in fluid communication with the flute and being angled toward a front wear surface,
6. The heavy duty drill tool of claim 1, in combination with a drilling drive steel member to which the reamer section is removably connected, and said drive steel member being formed of high fatigue-resistant steel comprised of a high NiCr alloy.
7. The heavy duty drill tool of claim 5, in which the heavy duty shank of said drill bit section has a square shank configuration with a dimension in the range of 9/16 to 3/4 inch, and said means for delivering flushing fluid comprising external vertical water flutes along the heavy duty square shank and angled channels directed toward the PCD wear surfaces.
8. The heavy duty drill tool of claim 7> in which the reamer section body has a chamber to receive the square shank of the drill bit section therein, and pinning means securing the drill bit section and reamer section together to form a unified tandem hole boring unit.
9. The heavy duty drill tool of claim 5, in which the heavy duty shank of the drill bit section is externally threaded and has a dimension in the range of 9/16 to 3/4 inches, and said means for delivering flushing fluid comprises external vertical water flutes along opposite sides of said heavy duly threaded shank and angled channels directed toward ihe PCD wear surfaces.
10. The heavy duty drill tool of claim 9, in which the reamer section body has A chamber to receive the threaded shank of the drill bit section therein and threadedly securing the drill bit section and reamer section together to form a unified tandem hole boring unit.
11. The method of drilling a sequential series of roof boring operations for forming a roof bolting matrix in metal/non-metal mines, comprising; forming a heavy duty drill tool having a drill bit section made of a high fatigue- resistant steel body with PCD cutter members constructed and arranged for forming bore
hole diameters up to 2 1/4 inches, and said steel body including a heavy duty shank constructed for connecting the drill bit section; forming a reamer section having a high fatigue-resistant steel body with an inner chamber constructed and arranged for securing the heavy duty shank therein to thereby form coupler means connecting the drill bit section to a drilling apparatus, providing at least one abrasive cutting insert on the reamer section body; said high fatigue-resistant steel body of at least one of said drill bit section and s;iid reamer section being formed of a high nickel/chromium alloy characterized by a tensile strength in the range of 175,000 to 225,000 psi and a yield strength in the range of 135,000 to 145,000 psi; and setting optimum drilling parameters for operating the drill bit section and reamer section in tandem in hard/soft rock formations.
12. The method of claim 11, in which said high fatigue-resistant steel body of the drill bit section is tempered to a Rockwell of 40 to 45 to have a tensile strength in a preferred range of 209,500 to 211 ,000 psi.
13. The method of claim 11, in which the steel bodies of both said drill bit section and said reamer section are formed of 4340 steel having a tensile strength of about 210,000 psi and a yield strength of about 141,000 psi.
14. The method of claim 11 , including using said PCD cutter members to form a bore hole in the range of 1 3/8 to 2 1/4 inches, and sizing said heavy duty shank to havώ a reamer section connecting dimension in range of 9/16 to 3/4 inches.
15. A method for greatly extended bore hole drilling in hard/soft rock formations as in metal/non-metal mines for establishing a roof bolting reinforcement matrix, comprising the steps of;
1. setting rotational drilling parameters that call for thrust forces up to 5000 pounds;
2. providing a heavy duty drilling system that includes; a. a drill bit section having a main steel body formed from a high nickel/chromium alloy steel having a tensile strength in the range of
175,000 to 225,000 psi, and being constructed and arranged with PCD cutting members having PCD surface layers with a thickness in the range of 0.045 to 0.065 inches and tungsten carbide support layers therefore whereby to form said PCD members having an increased mass, and the PCD layers having outer cutting edges arranged to bore a hole with a diameter of between 1-3/8 inch and 2 1/4 inches; and b, a reamer section having a main steel body formed from a high nickel/chromium alloy steel having a tensile strength in the range of 175,000 to 225,000 psi, and having at least two radially outwardly projecting noij-PCD abrasion inserts defining thereacross a predetermined rock boring under-reamer diameter smaller than the bore hole diameter across the outer cutting edges of said PCD cutting members; and c. said drill bit section and reamer section having axially aligned coupling means comprising a heavy duty shank formed on the steel body of the drill bit section and a complementary shank-receiving chamber in the steel body of the reamer section; and 3. axially interfitting the drill bit and reamer sections in a telescoped relationship to form a unitary cutting and reaming system and mounting the system on a drilling apparatus operating at thrust forces up to 6000 pounds to sequentially drill a multitude of bore holes.
16. The method of claim 15 in which the heavy duty shank and shank-receiving chamber have a threaded connection in their telescoped relationship.
17. The method of claim 15 in which the heavy duty shank has a square shank configuration received in the reamer section chamber and being secured therein.
18. The heavy duty drill tool of claim 1, in which said drill bit section is a pilot bit constructed and arranged to drill a pilot bore in the range of 1 3/8 to
2 1/4 inches, and said reamer section being constructed with plural cutting inserts arranged to form over-reamer means for forming a larger bore hole greater than 2 1/4 inches,
19. The heavy duty drill tool of claim 1, in which the disc-shaped wafers have a thickness range of about 0.250 to 0.290 inches.
20. The heavy duty drill tool of claim 1 , in which the disc-shaped wafers have a PCD layer in the thickness range of about 0,045 to 0.065 inches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2006320247A AU2006320247B2 (en) | 2005-11-29 | 2006-11-29 | Roof drilling system improvements |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/289,683 | 2005-11-29 | ||
| US11/289,683 US20070119624A1 (en) | 2005-11-29 | 2005-11-29 | Roof drilling improvements |
| US11/553,063 US7392866B2 (en) | 2005-11-29 | 2006-10-26 | Roof drilling system improvements |
| US11/553,063 | 2006-10-26 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO2007065099A2 WO2007065099A2 (en) | 2007-06-07 |
| WO2007065099A3 WO2007065099A3 (en) | 2008-02-14 |
| WO2007065099B1 true WO2007065099B1 (en) | 2008-04-17 |
Family
ID=38086325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2006/061329 WO2007065099A2 (en) | 2005-11-29 | 2006-11-29 | Roof drilling system improvements |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US20070119624A1 (en) |
| AU (1) | AU2006320247B2 (en) |
| WO (1) | WO2007065099A2 (en) |
| ZA (1) | ZA200805205B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070119624A1 (en) * | 2005-11-29 | 2007-05-31 | Brady William J | Roof drilling improvements |
| WO2008100194A2 (en) * | 2007-02-14 | 2008-08-21 | Sandvik Intellectual Property Ab | A drill bit and a single drilling apparatus |
| GB2461312B (en) * | 2008-06-27 | 2012-06-13 | Deep Casing Tools Ltd | Reaming tool |
| US9109412B2 (en) | 2010-06-04 | 2015-08-18 | Dover Bmcs Acquisition Corporation | Rotational drill bits and drilling apparatuses including the same |
| US8584777B2 (en) | 2010-06-04 | 2013-11-19 | Dover Bmcs Acquisition Corporation | Rotational drill bits and drilling apparatuses including the same |
| US8991524B2 (en) | 2010-09-13 | 2015-03-31 | Longyear Tm, Inc. | Impregnated drill bits with integrated reamers |
| US9080400B1 (en) | 2010-11-24 | 2015-07-14 | Dover Bmcs Acquisition Corporation | Rotational drill bits and drilling apparatuses including the same |
| CN102345447A (en) * | 2011-06-24 | 2012-02-08 | 中煤科工集团西安研究院 | Casting spliced diamond composite sheet anchor rod drill bit and connecting sleeve thereof |
| CN102747964A (en) * | 2012-07-11 | 2012-10-24 | 王青俊 | Diamond hard alloy composite tooth for oil exploration and mining |
| US9194187B2 (en) | 2013-03-15 | 2015-11-24 | Dover Bmcs Acquisition Corporation | Rotational drill bits and drilling apparatuses including the same |
| US10125550B2 (en) * | 2013-09-11 | 2018-11-13 | Smith International, Inc. | Orientation of cutting element at first radial position to cut core |
| USD1012131S1 (en) | 2022-03-03 | 2024-01-23 | Kennametal Inc. | Roof bit |
| CN117722125A (en) * | 2022-09-27 | 2024-03-19 | 重庆交通大学 | Special-shaped hole motor directional slotting cutter head fixture based on drilling jumbo and use method |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3163246A (en) * | 1963-04-18 | 1964-12-29 | Westinghouse Air Brake Co | Rock drill bit |
| USD340248S (en) * | 1991-05-23 | 1993-10-12 | Brady William J | Roof drill bit for mining |
| US5180022A (en) * | 1991-05-23 | 1993-01-19 | Brady William J | Rotary mining tools |
| US5429199A (en) * | 1992-08-26 | 1995-07-04 | Kennametal Inc. | Cutting bit and cutting insert |
| USD351174S (en) * | 1993-07-19 | 1994-10-04 | Brady William J | Roof drill bit for mining machine |
| US6161635A (en) * | 1995-06-07 | 2000-12-19 | Brady; William J. | Drilling system drive steel |
| US6092612A (en) * | 1995-06-07 | 2000-07-25 | Brady; William J. | Rotary drilling systems |
| US6374932B1 (en) * | 2000-04-06 | 2002-04-23 | William J. Brady | Heat management drilling system and method |
| US5988301A (en) * | 1997-06-20 | 1999-11-23 | Sandvik Ab | Drill rod and method for its manufacture |
| US6109377A (en) * | 1997-07-15 | 2000-08-29 | Kennametal Inc. | Rotatable cutting bit assembly with cutting inserts |
| USD430578S (en) * | 1998-10-08 | 2000-09-05 | Brady William J | Rotary mining bit |
| USD424579S (en) * | 1999-05-10 | 2000-05-09 | Brady William J | Rotary mining bit |
| USD514131S1 (en) * | 2004-07-08 | 2006-01-31 | The William J. Brady Loving Trust | Rock drilling tool with ovate cutters |
| US20070119624A1 (en) * | 2005-11-29 | 2007-05-31 | Brady William J | Roof drilling improvements |
-
2005
- 2005-11-29 US US11/289,683 patent/US20070119624A1/en not_active Abandoned
-
2006
- 2006-10-26 US US11/553,063 patent/US7392866B2/en active Active
- 2006-11-29 WO PCT/US2006/061329 patent/WO2007065099A2/en active Application Filing
- 2006-11-29 AU AU2006320247A patent/AU2006320247B2/en active Active
-
2008
- 2008-06-13 ZA ZA200805205A patent/ZA200805205B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AU2006320247B2 (en) | 2012-02-16 |
| ZA200805205B (en) | 2009-07-29 |
| US20070119625A1 (en) | 2007-05-31 |
| WO2007065099A2 (en) | 2007-06-07 |
| AU2006320247A1 (en) | 2007-06-07 |
| WO2007065099A3 (en) | 2008-02-14 |
| US20070119624A1 (en) | 2007-05-31 |
| US7392866B2 (en) | 2008-07-01 |
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