FR2125138A1 - Diamond drilling bit - with helical cutting edge - Google Patents

Diamond drilling bit - with helical cutting edge

Info

Publication number
FR2125138A1
FR2125138A1 FR7104841A FR7104841A FR2125138A1 FR 2125138 A1 FR2125138 A1 FR 2125138A1 FR 7104841 A FR7104841 A FR 7104841A FR 7104841 A FR7104841 A FR 7104841A FR 2125138 A1 FR2125138 A1 FR 2125138A1
Authority
FR
France
Prior art keywords
diamond
cutting edge
drilling bit
helical cutting
cutting
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.)
Granted
Application number
FR7104841A
Other languages
French (fr)
Other versions
FR2125138B1 (en
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Priority to FR7104841A priority Critical patent/FR2125138A1/en
Publication of FR2125138A1 publication Critical patent/FR2125138A1/en
Application granted granted Critical
Publication of FR2125138B1 publication Critical patent/FR2125138B1/fr
Granted 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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts

Abstract

Each diamond is arranged in the side wall of the chisel body for cutting the side wall of the borehole so that it has a blunt edge in the radial direction relative to the central shaft of the diamond bit and has a cutting edge aligned tangential with respect to a helix running through the cutting point of the diamond with its central axis coinciding with that of the diamond bit, the tangential direction being taken by the cutting point of the relevant diamond.
FR7104841A 1971-02-12 1971-02-12 Diamond drilling bit - with helical cutting edge Granted FR2125138A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7104841A FR2125138A1 (en) 1971-02-12 1971-02-12 Diamond drilling bit - with helical cutting edge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7104841A FR2125138A1 (en) 1971-02-12 1971-02-12 Diamond drilling bit - with helical cutting edge

Publications (2)

Publication Number Publication Date
FR2125138A1 true FR2125138A1 (en) 1972-09-29
FR2125138B1 FR2125138B1 (en) 1973-11-30

Family

ID=9071836

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7104841A Granted FR2125138A1 (en) 1971-02-12 1971-02-12 Diamond drilling bit - with helical cutting edge

Country Status (1)

Country Link
FR (1) FR2125138A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2371488A (en) * 1943-05-06 1945-03-13 Howard C Grubb Core bit
US2818233A (en) * 1954-05-03 1957-12-31 Jr Edward B Williams Drill bit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2371488A (en) * 1943-05-06 1945-03-13 Howard C Grubb Core bit
US2818233A (en) * 1954-05-03 1957-12-31 Jr Edward B Williams Drill bit

Also Published As

Publication number Publication date
FR2125138B1 (en) 1973-11-30

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Legal Events

Date Code Title Description
ST Notification of lapse
RC Opposition against decision of lapse
DA Annulment of decision of lapse
ST Notification of lapse