Global Patent Index - EP 1012438 A1

EP 1012438 A1 2000-06-28 - 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

EP 1012438 A1 (EN)

Application

EP 98944704 A

Priority

  • US 9818310 W
  • US 92493597 A
  • US 92528497 A
  • US 12930298 A
  • US 13901298 A

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 (main, further and additional classification)

E21B 17/10; E21B 10/46

IPC 8 full level (invention and additional information)

E21B 10/46 (2006.01); E21B 17/10 (2006.01)

CPC (invention and additional information)

E21B 17/1092 (2013.01); E21B 10/46 (2013.01)

Citation (search report)

See references of WO 9913194A1

Designated contracting state (EPC)

BE GB IT

EPO simple patent family

WO 9913194 A1 19990318; AU 9217998 A 19990329; EP 1012438 A1 20000628

INPADOC legal status


2004-01-28 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030718

2002-06-26 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020510

2000-06-28 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000329

2000-06-28 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE GB IT