Global Patent Index - EP 1500781 A3

EP 1500781 A3 20060412 - Method of designing a roller cone bit

Title (en)

Method of designing a roller cone bit

Title (de)

Verfahren zum Entwurf eines Rollenbohrmeissels

Title (fr)

Procédé de conception d'un trépan à molettes

Publication

EP 1500781 A3 20060412 (EN)

Application

EP 04025560 A 19990831

Priority

  • EP 03021139 A 19990831
  • 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 (search report)

  • [A] US 5372210 A 19941213 - HARRELL PATRICIA N [US]
  • [A] US 5415030 A 19950516 - JOGI PUSHKAR N [US], et al
  • [A] US 5794720 A 19980818 - SMITH LEE MORGAN [US], et al
  • [A] US 5730234 A 19980324 - PUTOT CLAUDE [FR]
  • [A] US 4815342 A 19890328 - BRETT JAMES F [US], et al
  • [A] CN 2082755 U 19910814 - XINAN PETROLEUM COLLEGE [CN]
  • [A] US 5197555 A 19930330 - ESTES ROY D [US]
  • [X] MA DEKUN: "The Operational Mechanics of the Rock Bit", 1996, PETROLEUM INDUSTRY PRESS, BEJING, CHINA, ISBN: 7-5021-1954-X, XP008058770
  • [AD] D. MA; J.J. AZAR: "A New Way to Characterize the Gouge-Scraping Action of Roller Cone Bits", SPE #19448, 1989, pages 1 - 21, XP002258936
  • [A] D. MA; J. J. AZAR: "Dynamics of Roller Cone Bits", JOURNAL OF ENERGY RESOURCES TECHNOLOGY, vol. 107, December 1985 (1985-12-01), pages 543 - 548, XP008058790
  • [A] DEKUN MA ET AL: "The Computer Simulation of the Interaction Between Roller Bit and Rock", SPE 29922, 14 November 1995 (1995-11-14), pages 309 - 317, XP002363878
  • [A] MA D ET AL: "A NEW METHOD FOR DESIGNING ROCK BIT", SPE PROCEEDINGS, XX, XX, vol. 22431, 24 March 1992 (1992-03-24), XP008058830
  • [A] D.K. MA; S.L. YANG: "Kinematics of the Cone Bit", SPE 10563, June 1985 (1985-06-01), XP002367444

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