EP 0669449 A3 19960605 - Nozzle structure for rotary drill bits.
Title (en)
Nozzle structure for rotary drill bits.
Title (de)
Düsenstruktur für Drehbohrmeissel.
Title (fr)
Structure de duse pour trépans de forage rotatif.
Publication
Application
Priority
GB 9403544 A 19940224
Abstract (en)
[origin: EP0669449A2] A nozzle structure for use in a rotary drill bit comprises an inner portion (36) which is formed with a passage through which, in use, drilling fluid may pass, and an outer portion (38) formed with an external screw thread (39) whereby the nozzle structure may be screwed into a corresponding internally screw threaded socket in a drill bit. At least the screw threaded outer portion (38) of the nozzle structure is formed from solid infiltrated matrix material so as to be resistant to erosion and damage. The inner and outer portions may be separate, integral or secured together. <IMAGE>
IPC 1-7
IPC 8 full level
B05B 15/06 (2006.01); B05B 15/65 (2018.01); B22F 3/26 (2006.01); B22F 5/06 (2006.01); E21B 10/60 (2006.01); E21B 10/61 (2006.01); E21B 10/62 (2006.01)
CPC (source: EP)
B05B 15/65 (2018.01); B22F 3/26 (2013.01); B22F 5/06 (2013.01); E21B 10/61 (2013.01); E21B 10/62 (2013.01)
Citation (search report)
- [A] US 4567954 A 19860204 - VOIGHT III ROBERT W [US], et al
- [A] US 4381825 A 19830503 - RADTKE ROBERT P
- [A] US 4533005 A 19850806 - MORRIS WILFORD V [US]
- [A] US 3358783 A 19671219 - JEAN RAYNAL, et al
- [A] US 4542798 A 19850924 - MADIGAN JAMES A [US]
- [A] US 3520478 A 19700714 - SHALER AMOS J
- [A] EP 0012966 A1 19800709 - GEN ELECTRIC [US]
- [A] US 4564324 A 19860114 - LEIBHARD ERICH [DE]
Designated contracting state (EPC)
BE DE
DOCDB simple family (publication)
EP 0669449 A2 19950830; EP 0669449 A3 19960605; GB 2286841 A 19950830; GB 9403544 D0 19940413
DOCDB simple family (application)
EP 95300879 A 19950213; GB 9403544 A 19940224