Drill bit and its manufacture
Abstract
Disclosed is a method and apparatus for mechanically and metallurgically holding a cutter in a drill bit pocket. The method includes using powder metallurgy techniques in the formation of a drill bit member having a plurality of pockets configured to inhibit displacement of cutters out of the pockets in a direction transverse to the drill bit working surface. The method further includes the steps of metallurgically bonding and mechanically engaging the cutter with the cutter pocket. The drill bit manufactured in accordance with the methods of the present invention include a carbide menstrum drill bit head having a working surface with a plurality of fluid courses and nozzles thereon in adjacent relationship with a plurality of cutter blade bands comprising a series of cutter pockets having cutters disposed therein in a fashion parallel with the working surface.
Term
No projected expiry on record.
- Priority
- Filed
- Published
- Today
1 claim: 1 independent, 0 dependent
- 1• a series of cutting pockets (14) with cutters (16) located in the pockets, so that the cutters are parallel to the working surface (12). • serie kuttelommer (14) med kuttere (16) plassert i lommene, slik at kutterne ligger parallelt med arbeidsflaten (12) .
10 paragraphs, as filed
(24) Lopedag 18.02.82 (62) Divorced / divorced from application no.
(71) (73) Soker / Patenthaver NL INDUSTRIES INC.,
1230 Avenue of the Americas, New York, NY, USA.
(86) International application no.
(86) International filing day (85) Date of transfer (41) Anniversary available from 01.11.82 (44) Announcement day (72) Inventing LOT WILLIAM SHORT, JR., Dallas, TX, USA (74) Proxy Siv. Olav Robsahm,
Bryns Patentkontor A / S, Oslo.
(54) DESCRIPTION OF THE INVENTION CROWN AND PROCESS FOR PREPARATION OF THIS. (30) Priority requested
30.04.81, USA, No. 259182.
(57) Summary
A method and apparatus for mechanically and metallurgically attaching a cutting edge to a drill bit pocket. The method includes the use of powder metallurgical techniques in the formation of a drill bit (10) having a plurality of pockets (14) configured to prevent displacement of the cutters (16) out of the pockets (14) in a direction transverse to the working surface of the drill bit (10). (12). The method includes a metallurgical bonding and mechanical engagement between cutters (16) and cutter webs (14). The drill bit produced in accordance with the method includes a drill bit head having a working surface (12) having a plurality of fluid paths (18) and nozzles (10) located adjacent to a plurality of cutting blades (22) comprising one
7 members in 7 offices
Priority claims4
| Document | Office | Kind | Date |
|---|---|---|---|
| 25918281 | United States of America | A | |
| 25918281 | United States of America | A | |
| 259182 | – | – | – |
| US19810259182 | – | – | – |
Members7
| Document | Office | Kind | |
|---|---|---|---|
| NO820504LThis record | Norway | L | |
| FR2504836A1 | France | A1 | |
| NL8201761A | Netherlands (Kingdom of the) | A | |
| JPS57187492A | Japan | A | |
| GB2099044A | United Kingdom | A | |
| DE3215698A1 | Germany | A1 | |
| US4453605A | United States of America | A |
Numbers
- Publication, DOCDB
- 820504
- Publication, EPODOC
- NO820504L
- Application
- 820504
- Application, DOCDB
- 820504
- Application, EPODOC
- NO19820000504
Titles2
- Norwegian
- BORKRONE OG FREMGANGSMAATE TIL FREMSTILLING AV DENNE
- English
- DRILL AND PROCEDURE FOR MANUFACTURING THIS
Classification
- CPC, 9
- B23P15/32
- B22F7/06
- B22F2998/00
- B23P15/28
- E21B10/567
- E21B10/602
- Y10S76/12
- Y10S76/11
- Y10T29/49865
- IPC, 6
- E21B10 50
- B22F7 06
- B23P15 28
- E21B10 56
- E21B10 567
- E21B10 60