EP 1012438 A1 20000628 - GAGE PAD ARRANGEMENTS FOR ROTARY DRILL BITS
Title (en)
GAGE PAD ARRANGEMENTS FOR ROTARY DRILL BITS
Title (de)
KALIBEREINSATZANORDNUNG FÜR DREHBOHRMEISSELN
Title (fr)
DISPOSITIF DE PATINS D'ETALONNAGE DESTINE A DES TREPANS DE FOREUSE ROTATIVE
Publication
Application
Priority
- US 9818310 W 19980903
- US 92493597 A 19970908
- US 92528497 A 19970908
- US 12930298 A 19980805
- US 13901298 A 19980824
Abstract (en)
[origin: WO9913194A1] A rotary bit drill bit of the rock bit or drag bit type suitable for directional drilling. The bit includes a bit body from carrying cutting structure on a leading end thereof. The body carries at least one set of gage pads, above which another set of gage pads may be either longitudinally spaced or rotationally spaced, or both. Longitudinally leading edges of the gage pads may carry cutting structure for smoothing the sidewall of the borehole. Cutting structure may likewise be disposed on the trailing ends of the gage pads to provide an up-drill capability to facilitate removal of the bit from the borehole. The gage pads provide enhanced bit stability and reduced side cutting tendencies, as well as (in the case of rock bits) reducing lateral loading on the rotatable cutters and associated bearing structure and seals. The invention also has utility in bits not specifically designed for directional drilling.
IPC 1-7
IPC 8 full level
E21B 10/46 (2006.01); E21B 17/10 (2006.01)
CPC (source: EP)
E21B 10/46 (2013.01); E21B 17/1092 (2013.01)
Citation (search report)
See references of WO 9913194A1
Designated contracting state (EPC)
BE GB IT
DOCDB simple family (publication)
WO 9913194 A1 19990318; AU 9217998 A 19990329; EP 1012438 A1 20000628
DOCDB simple family (application)
US 9818310 W 19980903; AU 9217998 A 19980903; EP 98944704 A 19980903