Global patent index - EP 0959224 A3

EP 0959224 A3 2000-07-12 - Side port nozzle in a PDC bit

Title (en)

Side port nozzle in a PDC bit

Title (de)

Düse mit seitlicher Öffnung für einen PDC Bohrkopf

Title (fr)

Buse a orifice transversal dans un trépan de forage PDC

Publication

EP 0959224 A3 (EN)

Application

EP 99303972 A

Priority

  • US 8406698 A
  • US 31114199 A

Abstract (en)

[origin: EP0959224A2] Using a nozzle having both a main passageway and a side passageway in a fixed head drill bit, especially a PDC bit, provides increased cooling and cleaning power, especially to the outer cutting surfaces. Additionally, causing a smaller side port passageway in a jet nozzle to intersect a larger main passageway in the nozzle in a manner that does not contain a chamfer or taper creates a non-plugging side port. The side port can then be sized down smaller than the size of the expected largest particle present in the mud without causing problems. <IMAGE>

IPC 1-7 (main, further and additional classification)

E21B 10/60

IPC 8 full level (invention and additional information)

E21B 10/60 (2006.01); E21B 10/61 (2006.01)

CPC (invention and additional information)

E21B 10/61 (2013.01); E21B 10/602 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 0959224 A2 19991124; EP 0959224 A3 20000712

INPADOC legal status

2001-07-05 [REG DE 8566] DESIGNATED COUNTRY DE NOT LONGER VALID

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2001-05-30 [18W] WITHDRAWN

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- Date of withdrawal: 20010403

2001-03-21 [AKX] PAYMENT OF DESIGNATION FEES

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- Free Format Text: GB IT

2001-03-07 [17P] REQUEST FOR EXAMINATION FILED

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- Effective date: 20010108

2000-07-12 [AK] DESIGNATED CONTRACTING STATES:

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- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-07-12 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

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1999-11-24 [AK] DESIGNATED CONTRACTING STATES:

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- Designated State(s): GB IT

1999-11-24 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

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- Free Format Text: AL;LT;LV;MK;RO;SI