CA967552A - Pressure equalizing system for rock bits - Google Patents

Pressure equalizing system for rock bits

Info

Publication number
CA967552A
CA967552A CA151,832A CA151832A CA967552A CA 967552 A CA967552 A CA 967552A CA 151832 A CA151832 A CA 151832A CA 967552 A CA967552 A CA 967552A
Authority
CA
Canada
Prior art keywords
pressure equalizing
equalizing system
rock bits
rock
bits
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.)
Expired
Application number
CA151,832A
Other versions
CA151832S (en
Inventor
Raymond W. Sartor
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.)
Dresser Industries Inc
Original Assignee
Dresser Industries 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
Application filed by Dresser Industries Inc filed Critical Dresser Industries Inc
Application granted granted Critical
Publication of CA967552A publication Critical patent/CA967552A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E21B10/24—Roller bits characterised by bearing, lubrication or sealing details characterised by lubricating details
CA151,832A 1971-11-24 1972-09-15 Pressure equalizing system for rock bits Expired CA967552A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20173371A 1971-11-24 1971-11-24

Publications (1)

Publication Number Publication Date
CA967552A true CA967552A (en) 1975-05-13

Family

ID=22747052

Family Applications (1)

Application Number Title Priority Date Filing Date
CA151,832A Expired CA967552A (en) 1971-11-24 1972-09-15 Pressure equalizing system for rock bits

Country Status (6)

Country Link
US (1) US3721306A (en)
AR (1) AR201187A1 (en)
CA (1) CA967552A (en)
DE (1) DE2258367A1 (en)
GB (1) GB1397970A (en)
IT (1) IT966440B (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847234A (en) * 1972-06-01 1974-11-12 Reed Tool Co Pressure relief device for drill bit lubrication system
US4014595A (en) * 1975-05-30 1977-03-29 Hughes Tool Company Drill bit with seal ring compensator
US4019785A (en) * 1975-05-30 1977-04-26 Hughes Tool Company Drill bit utilizing lubricant thermal expansion and relief valve for pressure control
US4055225A (en) * 1976-05-17 1977-10-25 Hughes Tool Company Lubricant pressure compensator for an earth boring drill bit
US4388984A (en) * 1981-02-09 1983-06-21 Smith International, Inc. Two-stage pressure relief valve
US4335791A (en) * 1981-04-06 1982-06-22 Evans Robert F Pressure compensator and lubricating reservoir with improved response to substantial pressure changes and adverse environment
US4552228A (en) * 1984-02-21 1985-11-12 Varel Mfg. Co. Low pressure differential compensator
US4577705A (en) * 1984-04-23 1986-03-25 Smith International, Inc. Bellows lubricant pressurizer for sealed bearing rock bits
US4730681A (en) * 1986-08-29 1988-03-15 Rock Bit Industries U.S.A., Inc. Rock bit cone lock and method
US4942930A (en) * 1989-02-28 1990-07-24 Cummins Engine Company, Inc. Lubrication system for an earth boring drill bit and methods for filling and retrofit installing thereof
US5381868A (en) * 1993-10-08 1995-01-17 Triumph*Lor Inc Sealed bearing roller reamer
US6116357A (en) * 1996-09-09 2000-09-12 Smith International, Inc. Rock drill bit with back-reaming protection
US6619412B2 (en) 1996-09-09 2003-09-16 Smith International, Inc. Protected lubricant reservoir for sealed earth boring drill bit
US6138778A (en) * 1999-08-20 2000-10-31 Camco International Inc. Rock bit lubricant relief valve
GB2365038B (en) * 2000-07-27 2004-06-02 Walker & Co James Ltd Sealing structure for a rock drill bit
US6802380B2 (en) 2001-08-31 2004-10-12 Halliburton Energy Services Inc. Pressure relief system and methods of use and making
US8448723B2 (en) * 2006-08-02 2013-05-28 Burintekh USA, LLC Seal assembly for drill bit

Also Published As

Publication number Publication date
GB1397970A (en) 1975-06-18
US3721306A (en) 1973-03-20
IT966440B (en) 1974-02-11
AR201187A1 (en) 1975-02-21
DE2258367A1 (en) 1973-05-30

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