EP 0119620 A3 19860212 - IMPROVED TOOTH DESIGN USING CYLINDRICAL DIAMOND CUTTING ELEMENTS
Title (en)
IMPROVED TOOTH DESIGN USING CYLINDRICAL DIAMOND CUTTING ELEMENTS
Publication
Application
Priority
US 47706883 A 19830321
Abstract (en)
[origin: EP0119620A2] The cutting performance of cylindrical polycrystalline synthetic diamond elements (12) is improved by segmenting such cylindrically shaped elements (12) along a plane or planes parallel to the longitudinal axis (16) of the cylindrically shaped elements (12). In the prefered embodiments half cylinder or quarter cylinder shaped segments are incorporated as the diamond cutting elements (12) within teeth (10) disposed on a rotating bit. The planar surface or surfaces (12) characterizing the cylindrical segments are oriented within the tooth (10) to provide the leading and cutting face of the diamond cutting element (12). Typically, such planar surfaces (22) are entirely exposed and disoposed adjacent to and form one wall of an adjacent and preceding fluid channel (24) whereby cleaning and cooling efficiency is also improved.
IPC 1-7
IPC 8 full level
E21B 10/46 (2006.01); E21B 10/56 (2006.01); E21B 10/567 (2006.01)
CPC (source: EP US)
E21B 10/567 (2013.01 - EP US)
Citation (search report)
- [Y] US 4373593 A 19830215 - PHAAL CORNELIUS [ZA], et al
- [Y] US 4190126 A 19800226 - KABASHIMA RYUICHI [JP]
- [Y] US 4351401 A 19820928 - FIELDER COY M
- [A] GB 2096669 A 19821020 - CHRISTENSEN INC
Designated contracting state (EPC)
BE CH DE FR GB LI NL
DOCDB simple family (publication)
EP 0119620 A2 19840926; EP 0119620 A3 19860212; EP 0119620 B1 19900228; AU 2568884 A 19840927; BR 8401280 A 19841030; CA 1218355 A 19870224; DE 3481435 D1 19900405; JP S6016692 A 19850128; ZA 842109 B 19841128
DOCDB simple family (application)
EP 84102985 A 19840319; AU 2568884 A 19840316; BR 8401280 A 19840320; CA 450039 A 19840320; DE 3481435 T 19840319; JP 5126584 A 19840319; ZA 842109 A 19840321