US2499282A - Rock bit - Google Patents

Rock bit Download PDF

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Publication number
US2499282A
US2499282A US682889A US68288946A US2499282A US 2499282 A US2499282 A US 2499282A US 682889 A US682889 A US 682889A US 68288946 A US68288946 A US 68288946A US 2499282 A US2499282 A US 2499282A
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US
United States
Prior art keywords
bit
rock bit
ribs
edges
shank
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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
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US682889A
Inventor
William A Roberts
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Individual
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Individual
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Priority to US682889A priority Critical patent/US2499282A/en
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Publication of US2499282A publication Critical patent/US2499282A/en
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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
    • E21B10/003—Drill bits with cutting edges facing in opposite axial directions
    • 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
    • E21B10/36—Percussion drill bits
    • E21B10/38—Percussion drill bits characterised by conduits or nozzles for drilling fluids

Definitions

  • This invention relates to an improved rock drill bit which is especially adapted to cut and break small rock that falls down the hole behind the bit during the drilling operation.
  • An object of the invention is to provide a drill bit having cutting edges on the top surface thereof which will cut rocks that fall on the top of the bit and jam the bit in the hole, sometimes making it impossible to loose the bit from the hole.
  • the present type of bits that are being used do not provide means for cutting the falling rocks and it requires extra labor, material and expense to remove such bits from the hole when jammed.
  • the present bit which is provided with cutting edges on the top surfaces of the cutters, will cut this fallen rock and aid in removing the bit from the hole.
  • Figure 1 is a perspective view of anfembodiment of the invention.
  • Figure 2 is a vertical, longitudinal sectional view thereof.
  • the reference numeral I designates the drill which is constructed in accordance with the invention.
  • the bit comprises the tubular shank I2 which is internally threaded with left-hand round threads I4.
  • the shank is provided with the inclined oppositely positioned downwardly inclined ribs I6 having concave sides I8 and the upwardly tapered cutting edges 20.
  • the ribs I6 have nat upper surfaces 22, and these surfaces are provided with upwardly inclined reverse cutting blades 24 having the knife edge 26 extending from a point adjacent the cutting edges 20 to a point above the ribs I6 where the blades terminate in the cutting edges 28 having the knife edge 30 and these edges are in reverse relation to the edges 20.
  • edges 20 are provided at their central point with the water inlets 32, and these inlets form a center point 34 which is at the center vertical line of the bit. These openings communicate with the water passage 36 as do the 1 Claim. (Cl. Z55-64) openings 38 positioned in the shank I2 intermediate of the ribs I6, and the passage 36 communicates with the threaded bore of the shank.

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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)

Description

Feb. V28,l 1950 w. A. ROBERTS lROCK BIT Filed July 1l, 1946 FIGURE 2 I I N VEN TOR.
WILLIAM A. ROBERTS Patented Feb. 28, 1950 UNITED sTATEs vPATENT OFFICE RGCK BIT William A. Roberts, Lakewood, Colo.
Application July 11, 1946, Serial No. 682,889
This invention relates to an improved rock drill bit which is especially adapted to cut and break small rock that falls down the hole behind the bit during the drilling operation.
An object of the invention is to provide a drill bit having cutting edges on the top surface thereof which will cut rocks that fall on the top of the bit and jam the bit in the hole, sometimes making it impossible to loose the bit from the hole.
The present type of bits that are being used do not provide means for cutting the falling rocks and it requires extra labor, material and expense to remove such bits from the hole when jammed. However, the present bit, which is provided with cutting edges on the top surfaces of the cutters, will cut this fallen rock and aid in removing the bit from the hole.
With the above and other objects and advantages in view, the invention consists of the novel details of construction, arrangement and combination of parts more fully hereinafter described, claimed and illustrated in the accompanying drawing in which:
Figure 1 is a perspective view of anfembodiment of the invention, and
Figure 2 is a vertical, longitudinal sectional view thereof.
Referring more in detail to the drawing, the reference numeral I designates the drill which is constructed in accordance with the invention.
The bit comprises the tubular shank I2 which is internally threaded with left-hand round threads I4.
The shank is provided with the inclined oppositely positioned downwardly inclined ribs I6 having concave sides I8 and the upwardly tapered cutting edges 20.
The ribs I6 have nat upper surfaces 22, and these surfaces are provided with upwardly inclined reverse cutting blades 24 having the knife edge 26 extending from a point adjacent the cutting edges 20 to a point above the ribs I6 where the blades terminate in the cutting edges 28 having the knife edge 30 and these edges are in reverse relation to the edges 20.
The edges 20 are provided at their central point with the water inlets 32, and these inlets form a center point 34 which is at the center vertical line of the bit. These openings communicate with the water passage 36 as do the 1 Claim. (Cl. Z55-64) openings 38 positioned in the shank I2 intermediate of the ribs I6, and the passage 36 communicates with the threaded bore of the shank.
It will be apparent from the foregoing description that a bit as above described will, with the use of the cutting blades 24 and edges 28, cut any rock falling on top of the bit, to permit easy removal of the bit as directed, thus Dreventing jamming of the bit and saving time in its removal.
It is believed that the construction and advantages of the invention will be apparent to those skilled in the art, and it is to be understood that changes in the minor details of construction, arrangement and combination of partsmay be resorted to, provided they fall within the spirit of the invention and the scope of the appended claim.
Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:
In a bit of the character described having an internally threaded tubular shank, the improvement comprising ribs on said shank in diametrically opposed relation to each other, said ribs having downwardly and outwardly inclined outer faces and concave sides, upwardly and outwardlyl REFERENCES CITED The following references are of record in the le of this patent:
UNITED STATES PATENTS Number Name Date 1,718,462 Hardsocg June 25, 1929 2,101,566 Vanderpool Dec. 7, 1937 2,150,189 Ronneberg Mar. 14, 1939
US682889A 1946-07-11 1946-07-11 Rock bit Expired - Lifetime US2499282A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US682889A US2499282A (en) 1946-07-11 1946-07-11 Rock bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US682889A US2499282A (en) 1946-07-11 1946-07-11 Rock bit

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US2499282A true US2499282A (en) 1950-02-28

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2519861A (en) * 1947-01-14 1950-08-22 John D Bilbao Double-acting drill bit
US2602639A (en) * 1948-07-19 1952-07-08 Gwylam G Green Rock drill bit
US2746722A (en) * 1950-07-17 1956-05-22 Schneider Jacob Reversible drill bit
US3043385A (en) * 1958-03-13 1962-07-10 Boyle Charles Morris Reverse drilling rock bit
US4280573A (en) * 1979-06-13 1981-07-28 Sudnishnikov Boris V Rock-breaking tool for percussive-action machines
US20080251297A1 (en) * 2007-03-14 2008-10-16 Overstreet James L Passive and active up-drill features on fixed cutter earth-boring tools and related methods

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1718462A (en) * 1923-07-02 1929-06-25 Hardsocg Martin Rock drill
US2101566A (en) * 1937-01-28 1937-12-07 Dee Wakefield Nonfouling drill
US2150189A (en) * 1938-01-17 1939-03-14 Ronneberg Erik Drill chuck for mine drilling machines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1718462A (en) * 1923-07-02 1929-06-25 Hardsocg Martin Rock drill
US2101566A (en) * 1937-01-28 1937-12-07 Dee Wakefield Nonfouling drill
US2150189A (en) * 1938-01-17 1939-03-14 Ronneberg Erik Drill chuck for mine drilling machines

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2519861A (en) * 1947-01-14 1950-08-22 John D Bilbao Double-acting drill bit
US2602639A (en) * 1948-07-19 1952-07-08 Gwylam G Green Rock drill bit
US2746722A (en) * 1950-07-17 1956-05-22 Schneider Jacob Reversible drill bit
US3043385A (en) * 1958-03-13 1962-07-10 Boyle Charles Morris Reverse drilling rock bit
US4280573A (en) * 1979-06-13 1981-07-28 Sudnishnikov Boris V Rock-breaking tool for percussive-action machines
US20080251297A1 (en) * 2007-03-14 2008-10-16 Overstreet James L Passive and active up-drill features on fixed cutter earth-boring tools and related methods
US8047309B2 (en) * 2007-03-14 2011-11-01 Baker Hughes Incorporated Passive and active up-drill features on fixed cutter earth-boring tools and related systems and methods

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