NL7308915A - - Google Patents

Info

Publication number
NL7308915A
NL7308915A NL7308915A NL7308915A NL7308915A NL 7308915 A NL7308915 A NL 7308915A NL 7308915 A NL7308915 A NL 7308915A NL 7308915 A NL7308915 A NL 7308915A NL 7308915 A NL7308915 A NL 7308915A
Authority
NL
Netherlands
Application number
NL7308915A
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 US00330412A external-priority patent/US3847234A/en
Application filed filed Critical
Publication of NL7308915A publication Critical patent/NL7308915A/xx

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
NL7308915A 1973-02-07 1973-06-27 NL7308915A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00330412A US3847234A (en) 1972-06-01 1973-02-07 Pressure relief device for drill bit lubrication system

Publications (1)

Publication Number Publication Date
NL7308915A true NL7308915A (en) 1974-08-09

Family

ID=23289651

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7308915A NL7308915A (en) 1973-02-07 1973-06-27

Country Status (4)

Country Link
JP (1) JPS5937389B2 (en)
BR (1) BR7305126D0 (en)
DE (1) DE2332737A1 (en)
NL (1) NL7308915A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5996387A (en) * 1982-11-25 1984-06-02 スタ−ロイ産業株式会社 Rotary rock bit
JPS59178494U (en) * 1983-05-13 1984-11-29 株式会社小松製作所 Mechanical seal device for turbo drill
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
JPS638789Y2 (en) * 1984-10-25 1988-03-16
JPS6180884U (en) * 1984-10-31 1986-05-29
US6092611A (en) * 1997-05-28 2000-07-25 Dresser Industries, Inc. Encapsulated elastomeric relief valve

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3719241A (en) * 1971-11-24 1973-03-06 Dresser Ind Free breathing lubrication system for sealed bearing rock bits

Also Published As

Publication number Publication date
JPS49111802A (en) 1974-10-24
DE2332737A1 (en) 1974-08-08
JPS5937389B2 (en) 1984-09-10
BR7305126D0 (en) 1974-09-24

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Legal Events

Date Code Title Description
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
BV The patent application has lapsed