GB794623A - A new bit for pneumatic rock drills - Google Patents

A new bit for pneumatic rock drills

Info

Publication number
GB794623A
GB794623A GB7823/56A GB782356A GB794623A GB 794623 A GB794623 A GB 794623A GB 7823/56 A GB7823/56 A GB 7823/56A GB 782356 A GB782356 A GB 782356A GB 794623 A GB794623 A GB 794623A
Authority
GB
United Kingdom
Prior art keywords
inserts
head
drill
wedge
gauge
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.)
Expired
Application number
GB7823/56A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INTERNAT DRILL CORP PROPRIETAR
Original Assignee
INTERNAT DRILL CORP PROPRIETAR
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by INTERNAT DRILL CORP PROPRIETAR filed Critical INTERNAT DRILL CORP PROPRIETAR
Publication of GB794623A publication Critical patent/GB794623A/en
Expired legal-status Critical Current

Links

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
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • 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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/58—Chisel-type inserts
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods

Abstract

794,623. Percussive drills. INTERNATIONAL DRILL CORPORATION (PROPRIETARY), Ltd. March 13, 1956 [March 15, 1955; Feb. 22, 1956], No. 7823/56. Class 124. A bit for a percussive drill has cutting inserts forming a chisel shaped cutting edge and means to move the inserts laterally to compensate for gauge loss. As shown, the bit may comprise a pair of inserts 12 slidable in a slot 11 in a drill head and having between them an inverted-V shaped space 25. A wedge 22 arranged in the drill head enters the space 25 between the inserts and is held in position by end 15 of a shank 16, a series of shims 19 between the head and the shank limiting the forward position of the wedge. The shims may be removed one at a time allowing the wedge to enter further into the space and force the inserts apart. Other methods of adjusting the gauge of the drill include inserting shims between the inserts and a central support on the head, Fig. 7 (not shown), mounting the inserts each on one base which bases may be moved apart by right and left hand threads on a screw, Fig. 8 (not shown), and providing the inserts and the slot in the head with corresponding corrugations, the inserts being removed from the head and replaced again in a position to restore the gauge, Fig. 10 (not shown).
GB7823/56A 1955-03-15 1956-03-13 A new bit for pneumatic rock drills Expired GB794623A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA794623X 1955-03-15

Publications (1)

Publication Number Publication Date
GB794623A true GB794623A (en) 1958-05-07

Family

ID=25574464

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7823/56A Expired GB794623A (en) 1955-03-15 1956-03-13 A new bit for pneumatic rock drills

Country Status (1)

Country Link
GB (1) GB794623A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2216760A1 (en) * 1972-04-07 1973-10-18 Hawera Probst Kg Hartmetall ROCK DRILLS
DE3308441C1 (en) * 1983-03-10 1984-07-12 Christensen, Inc., Salt Lake City, Utah Compensation device for deep drilling tools that can be inserted into a drill string

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2216760A1 (en) * 1972-04-07 1973-10-18 Hawera Probst Kg Hartmetall ROCK DRILLS
DE3308441C1 (en) * 1983-03-10 1984-07-12 Christensen, Inc., Salt Lake City, Utah Compensation device for deep drilling tools that can be inserted into a drill string

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