US2821364A - Two-way bit - Google Patents

Two-way bit Download PDF

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Publication number
US2821364A
US2821364A US440589A US44058954A US2821364A US 2821364 A US2821364 A US 2821364A US 440589 A US440589 A US 440589A US 44058954 A US44058954 A US 44058954A US 2821364 A US2821364 A US 2821364A
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Prior art keywords
bit
drill
lugs
way bit
diameter
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Expired - Lifetime
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US440589A
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Godfrey Grant
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    • 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
    • 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

Definitions

  • This invention relates to drill bits utilized in drilling holes in ore, coal and also utilized in drilling for oil, water and for exploratory examinations.
  • One important object of the invention is to provide a novel device of this character in which provision is made for the easy withdrawal of a bit in case it is necessary to perform this operation.
  • a second important object of the invention is to provide an integral device of this character which may be attached to the end of a drill rod and act both to drill inwardly or downwardly and to drill upwardly and outwardly.
  • a third important object of the invention is to provide a device of this character wherein the outward or upward movement of the bit may be facilitated by means provided on the upper side of the bit for clearing the path of with drawal.
  • Figure l is a perspective view of the improved invention applied to the lower end of a drill rod.
  • Figure 2 is an enlarged perspective view of the present invention removed from the drill rod.
  • Figure 3 is a transverse section on the line 3-3 of Figure 4.
  • Figure 4 is a section on the line 4-4 of Figure 3.
  • a generally cylindrical structure having a cylindrical body portion 10.
  • This body portion has a vertical passage 11 extending therethrough and at the upper end of this passage internal screw threads 12 are formed i atented Jan. 28, 1958 so that the device may be attached to the lower end of the drill rod 13 by means of this threading.
  • lugs 14 Projecting outwardly from the lower end of the body 10 but integral therewith are lugs 14 and each of these lugs is slotted as at 15 to receive and frictionally retain a cutter 16 which, for some purposes may be of tool steel. In oil well drilling diamond cutters inset in steel shanks in conventional manner, may be employed.
  • a [cylindrical bore of relatively great diameter is formed.
  • the drill hole made in this manner may fill in slightly behind the full diameter intended to be drilled.
  • the cutters 16 will have no power to remove any slight obstructions from the wall of the drill hole above the bit.
  • the purpose of the cutting edges 18 is therefore to remove any of these slight obstructions and these cutting edges 18 may be made of the same material as the body 10 since the work they do is very slight but they will clear the way for ready withdrawal of the bit when desired. It has been found that as small a difierence in diameter as one-twentieth of an inch is suflicient to ensure easy withdrawal of the bit when such becomes necessary or desirable.
  • a drill bit adapted to fit on the end of a drill rod and having a cylindrical socketed body portion, lugs spaced around and radiating outwardly from the lower end of said body, each of said lugs having a slotted cutter socket formed in its bottom face, said slots extending into said body, a cutter bit mounted in each of said slots, divergingly and upwardly extending lugs spaced around the upper end of said body and having cutting teeth formed on their upper edges of lesser diameter in revolution than the cutters carried by the first-mentioned lugs, said upwardly extending lugs being integral with said body.

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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)
  • Drilling Tools (AREA)

Description

Jan. 28, 1958 e. GODFREY 2,821,364
TWO-WAY BIT Filed July 1, 1954 I I 6/64 /V7 GOD/CAPE y Q ATTORNEYG United States Patent ice TWO-WAY BIT Grant Godfrey, Satford, Ariz.
Application July 1, 1954, Serial No. 440,589
1 Claim. (Cl. 255-64) This invention relates to drill bits utilized in drilling holes in ore, coal and also utilized in drilling for oil, water and for exploratory examinations.
One important object of the invention is to provide a novel device of this character in which provision is made for the easy withdrawal of a bit in case it is necessary to perform this operation.
A second important object of the invention is to provide an integral device of this character which may be attached to the end of a drill rod and act both to drill inwardly or downwardly and to drill upwardly and outwardly.
A third important object of the invention is to provide a device of this character wherein the outward or upward movement of the bit may be facilitated by means provided on the upper side of the bit for clearing the path of with drawal.
With the above and other objects in View, the invention consists in general of certain novel details of construction and combination of parts hereinafter fully described and illustrated in the accompanying drawings and particularly claimed.
In the accompanying drawings, like characters of reference indicate like parts in the several views and:
Figure l is a perspective view of the improved invention applied to the lower end of a drill rod.
Figure 2 is an enlarged perspective view of the present invention removed from the drill rod.
Figure 3 is a transverse section on the line 3-3 of Figure 4.
Figure 4 is a section on the line 4-4 of Figure 3.
In the embodiment of the invention as herein shown there is provided a generally cylindrical structure having a cylindrical body portion 10. This body portion has a vertical passage 11 extending therethrough and at the upper end of this passage internal screw threads 12 are formed i atented Jan. 28, 1958 so that the device may be attached to the lower end of the drill rod 13 by means of this threading.
Projecting outwardly from the lower end of the body 10 but integral therewith are lugs 14 and each of these lugs is slotted as at 15 to receive and frictionally retain a cutter 16 which, for some purposes may be of tool steel. In oil well drilling diamond cutters inset in steel shanks in conventional manner, may be employed.
At the upper end of the body there are provided similarly diverging lugs 17 having cutting edges 18.
Now by reference to Figure 4 it will be seen that the diameter X of the circle within which the cutters 16 revolve is somewhat less than the diameter of the circle in which the cutting edges 18 revolve.
In operation as the drill proceeds inwardly or downwardly a [cylindrical bore of relatively great diameter is formed. However, the drill hole made in this manner may fill in slightly behind the full diameter intended to be drilled. In such a case when it is desired to withdraw the bit then the cutters 16 will have no power to remove any slight obstructions from the wall of the drill hole above the bit. The purpose of the cutting edges 18 is therefore to remove any of these slight obstructions and these cutting edges 18 may be made of the same material as the body 10 since the work they do is very slight but they will clear the way for ready withdrawal of the bit when desired. It has been found that as small a difierence in diameter as one-twentieth of an inch is suflicient to ensure easy withdrawal of the bit when such becomes necessary or desirable.
What is claimed is:
As a new article of manufacture, a drill bit adapted to fit on the end of a drill rod and having a cylindrical socketed body portion, lugs spaced around and radiating outwardly from the lower end of said body, each of said lugs having a slotted cutter socket formed in its bottom face, said slots extending into said body, a cutter bit mounted in each of said slots, divergingly and upwardly extending lugs spaced around the upper end of said body and having cutting teeth formed on their upper edges of lesser diameter in revolution than the cutters carried by the first-mentioned lugs, said upwardly extending lugs being integral with said body.
References Cited in the file of this patent UNITED STATES PATENTS 54,226 Smith Apr. 24, 1866 658,060 Dudley Sept. 18, 1900 2,519,861 Turner Aug. 22, 1950 2,628,072 Baker Feb. 10, 1953
US440589A 1954-07-01 1954-07-01 Two-way bit Expired - Lifetime US2821364A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2904312A (en) * 1957-03-05 1959-09-15 Schneider Jacob Coupling for rock drill
US3094180A (en) * 1960-05-23 1963-06-18 William J Haith Rock drilling bit
US3128836A (en) * 1962-04-23 1964-04-14 Sandvikens Jernverks Ab Percussion drill bit
US3145789A (en) * 1962-03-20 1964-08-25 Russell H Lawry Pilot rock drill
US3771611A (en) * 1971-05-13 1973-11-13 Tone Boring Co Earth boring apparatus
DE2928445A1 (en) * 1979-06-13 1981-01-29 Inst Gornogo Dela Sibirskogo O DRILLING TOOL FOR STRIKING MACHINES
US4953642A (en) * 1989-03-20 1990-09-04 Skaggs Roger D Rock drill bit
US5366032A (en) * 1993-06-09 1994-11-22 Kay Mark A Rock bit
US6089334A (en) * 1998-03-13 2000-07-18 Clark Equipment Company Invertible auger
US6494275B2 (en) * 2000-03-02 2002-12-17 Sandvik Ab Rock drill bit having retrac teeth and method for its manufacturing
WO2004003332A1 (en) * 2002-06-26 2004-01-08 Sandvik Ab Rock drill bit and method for the manufacture thereof
CN107989550A (en) * 2017-12-28 2018-05-04 山东里能鲁西矿业有限公司 A kind of bidirectional drill

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US54226A (en) * 1866-04-24 Improved rock-drill
US658060A (en) * 1900-07-21 1900-09-18 William Archer Dudley Rock-drill head.
US2519861A (en) * 1947-01-14 1950-08-22 John D Bilbao Double-acting drill bit
US2628072A (en) * 1949-09-01 1953-02-10 Timken Roller Bearing Co Drill bit having groove with hard metal cutter insert brazed therein

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US54226A (en) * 1866-04-24 Improved rock-drill
US658060A (en) * 1900-07-21 1900-09-18 William Archer Dudley Rock-drill head.
US2519861A (en) * 1947-01-14 1950-08-22 John D Bilbao Double-acting drill bit
US2628072A (en) * 1949-09-01 1953-02-10 Timken Roller Bearing Co Drill bit having groove with hard metal cutter insert brazed therein

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2904312A (en) * 1957-03-05 1959-09-15 Schneider Jacob Coupling for rock drill
US3094180A (en) * 1960-05-23 1963-06-18 William J Haith Rock drilling bit
US3145789A (en) * 1962-03-20 1964-08-25 Russell H Lawry Pilot rock drill
US3128836A (en) * 1962-04-23 1964-04-14 Sandvikens Jernverks Ab Percussion drill bit
US3771611A (en) * 1971-05-13 1973-11-13 Tone Boring Co Earth boring apparatus
DE2928445A1 (en) * 1979-06-13 1981-01-29 Inst Gornogo Dela Sibirskogo O DRILLING TOOL FOR STRIKING MACHINES
US4953642A (en) * 1989-03-20 1990-09-04 Skaggs Roger D Rock drill bit
US5366032A (en) * 1993-06-09 1994-11-22 Kay Mark A Rock bit
US6089334A (en) * 1998-03-13 2000-07-18 Clark Equipment Company Invertible auger
US6494275B2 (en) * 2000-03-02 2002-12-17 Sandvik Ab Rock drill bit having retrac teeth and method for its manufacturing
WO2004003332A1 (en) * 2002-06-26 2004-01-08 Sandvik Ab Rock drill bit and method for the manufacture thereof
US20040065482A1 (en) * 2002-06-26 2004-04-08 Sandvik Ab Rock drill bit and method for the manufacture thereof
CN107989550A (en) * 2017-12-28 2018-05-04 山东里能鲁西矿业有限公司 A kind of bidirectional drill
CN107989550B (en) * 2017-12-28 2020-01-24 山东里能鲁西矿业有限公司 Bidirectional drill bit

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