EP 1371811 B1 20110330 - Roller cone drill bit, method of designing the same and rotary drilling system
Title (en)
Roller cone drill bit, method of designing the same and rotary drilling system
Title (de)
Rollenbohrmeissel, zugehöriges Entwurfsverfahren und Drehbohrsystem
Title (fr)
Trépan à cônes, procédé pour sa conception et système de forage rotatif
Publication
Application
Priority
- EP 99945376 A 19990831
- US 9844298 P 19980831
Abstract (en)
[origin: WO0012860A2] A novel and improved roller cone drill bit and method of design are disclosed. A roller cone drill bit for drilling through subterranean formations having an upper connection for attachment to a drill string, and a plurality of cutting structures rotatably mounted on arms extending downward from the connection. A number of teeth are located in generally concentric rows on each cutting structure. The actual trajectory by which the teeth engage the formation is mathematically determined. A straight-line trajectory is calculated based on the actual trajectory. The teeth are positioned in the cutting structures such that each tooth having a designed engagement surface is oriented perpendicular to the calculated straight-line trajectory.
IPC 8 full level
E21B 10/08 (2006.01); E21B 10/16 (2006.01); E21B 41/00 (2006.01)
CPC (source: EP)
E21B 10/08 (2013.01); E21B 10/16 (2013.01)
Citation (examination)
- CN 2082755 U 19910814 - XINAN PETROLEUM COLLEGE [CN]
- US 5197555 A 19930330 - ESTES ROY D [US]
- DEKUN M.: "THE OPERATIONAL MECHANICS OF THE ROCK BIT PASSAGE", OPERATIONAL MECHANICS OF THE ROCK BIT, PETROLEUM INDUSTRY PRESS, LONDON, GB, 1 January 1996 (1996-01-01), pages WHOLEBOOK, XP008058770
- MA D. ET AL: "DYNAMICS OF ROLLER CONE BITS", JOURNAL OF ENERGY RESOURCES TECHNOLOGY + TRANSACTIONS OF THE ASME, NEW YORK, NY, US, vol. 107, 1 December 1985 (1985-12-01), pages 543 - 548, XP008058790, ISSN: 0195-0738
- DEKUN MA ET AL: "The Computer Simulation of the Interaction Between Roller Bit and Rock", SPE PAPERS, XX, XX, no. SPE 29922, 14 November 1995 (1995-11-14), pages 309 - 317, XP002363878
- MA D. ET AL: "A NEW METHOD FOR DESIGNING ROCK BIT", SPE PROCEEDINGS, vol. 22431, 24 March 1992 (1992-03-24), XP008058830
- MA D.K. ET AL: "Kinematics of the Cone Bit", SOCIETY OF PETROLEUM ENGINEERS JOURNAL, DALLAS, TX, US, no. 10563, 1 June 1985 (1985-06-01), pages 321 - 329,716, XP002367444, ISSN: 0197-7520
Designated contracting state (EPC)
GB IT
DOCDB simple family (publication)
WO 0012860 A2 20000309; WO 0012860 A3 20000608; WO 0012860 A9 20001123; AU 5798499 A 20000321; EP 1117894 A2 20010725; EP 1117894 A4 20020814; EP 1117894 B1 20031203; EP 1117894 B2 20100303; EP 1371811 A2 20031217; EP 1371811 A3 20040102; EP 1371811 B1 20110330; EP 1498572 A2 20050119; EP 1498572 A3 20060412; EP 1500781 A2 20050126; EP 1500781 A3 20060412; EP 1500782 A2 20050126; EP 1500782 A3 20060412; EP 1500783 A2 20050126; EP 1500783 A3 20060412; ID 28893 A 20010712; MX PA01002208 A 20030327
DOCDB simple family (application)
US 9919992 W 19990831; AU 5798499 A 19990831; EP 03021139 A 19990831; EP 04025232 A 19990831; EP 04025560 A 19990831; EP 04025561 A 19990831; EP 04025562 A 19990831; EP 99945376 A 19990831; ID 20010732 A 19990831; MX PA01002208 A 19990831