CA2330987A1 - Protected lubricant reservoir with pressure control for sealed bearing earth boring drill bit - Google Patents

Protected lubricant reservoir with pressure control for sealed bearing earth boring drill bit Download PDF

Info

Publication number
CA2330987A1
CA2330987A1 CA002330987A CA2330987A CA2330987A1 CA 2330987 A1 CA2330987 A1 CA 2330987A1 CA 002330987 A CA002330987 A CA 002330987A CA 2330987 A CA2330987 A CA 2330987A CA 2330987 A1 CA2330987 A1 CA 2330987A1
Authority
CA
Canada
Prior art keywords
reservoir
bit
lubricant reservoir
drill bit
pressure control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002330987A
Other languages
French (fr)
Other versions
CA2330987C (en
Inventor
Robert H. Slaughter, Jr.
Peter T. Cariveau
Kirk A. Norris
Roger Didericksen
William M. Conn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Smith International Inc
Original Assignee
Smith International Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US09/487,947 external-priority patent/US6206110B1/en
Application filed by Smith International Inc filed Critical Smith International Inc
Publication of CA2330987A1 publication Critical patent/CA2330987A1/en
Application granted granted Critical
Publication of CA2330987C publication Critical patent/CA2330987C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/08—Roller bits
    • E21B10/22—Roller bits characterised by bearing, lubrication or sealing details

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Abstract

A rotary cone rock bit, comprises a bit body including a plurality of legs extending therefrom, each of the legs having an outer surface that includes a leading surface and a trailing surface, a roller cone rotatably supported on each of the legs, a bearing system between each cone and the leg on which it is supported, and a lubricant reservoir in fluid communication with the bearing system. The reservoir can be provided with a wear resistant plug, if desired. In the present bit, the reservoir can be pressured-balanced with fluid in the bit plenum or the borehole annulus, or maintained at some desired differential with respect to either of these. Alternatively, the reservoir can be formed inside the bit body, preferably by means of a canister, which can be provided with venting means as desired.
CA002330987A 2000-01-18 2001-01-11 Protected lubricant reservoir with pressure control for sealed bearing earth boring drill bit Expired - Lifetime CA2330987C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/487,947 US6206110B1 (en) 1996-09-09 2000-01-18 Protected lubricant reservoir with pressure control for sealed bearing earth boring drill bit
US09/487,947 2000-01-18

Publications (2)

Publication Number Publication Date
CA2330987A1 true CA2330987A1 (en) 2001-07-18
CA2330987C CA2330987C (en) 2007-01-02

Family

ID=23937764

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002330987A Expired - Lifetime CA2330987C (en) 2000-01-18 2001-01-11 Protected lubricant reservoir with pressure control for sealed bearing earth boring drill bit

Country Status (4)

Country Link
AU (1) AU774291B2 (en)
CA (1) CA2330987C (en)
SE (1) SE0100090L (en)
ZA (1) ZA200100323B (en)

Also Published As

Publication number Publication date
CA2330987C (en) 2007-01-02
SE0100090L (en) 2001-07-19
SE0100090D0 (en) 2001-01-12
AU774291B2 (en) 2004-06-24
ZA200100323B (en) 2001-07-26
AU1496001A (en) 2001-07-19

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Legal Events

Date Code Title Description
EEER Examination request