GB1407378A - Pressure relief device for drill bit lubrication system - Google Patents

Pressure relief device for drill bit lubrication system

Info

Publication number
GB1407378A
GB1407378A GB2655973A GB2655973A GB1407378A GB 1407378 A GB1407378 A GB 1407378A GB 2655973 A GB2655973 A GB 2655973A GB 2655973 A GB2655973 A GB 2655973A GB 1407378 A GB1407378 A GB 1407378A
Authority
GB
United Kingdom
Prior art keywords
port
diaphragm
drill bit
pressure relief
lubrication system
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
GB2655973A
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.)
Camco Drilling Group Ltd
Original Assignee
Reed Tool Co Ltd
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 Reed Tool Co Ltd filed Critical Reed Tool Co Ltd
Priority to GB2655973A priority Critical patent/GB1407378A/en
Publication of GB1407378A publication Critical patent/GB1407378A/en
Expired 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
    • E21B10/24—Roller bits characterised by bearing, lubrication or sealing details characterised by lubricating 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)
  • Drilling And Boring (AREA)

Abstract

1407378 Boring earth &c REED TOOL CO 4 June 1973 26559/73 Heading E1F [Also in Division F2] The lubricating system of a roller-cutter drill bit has a normally-closed port 56, Fig 2, which is capable of opening to allow the passage of lubricating or drilling fluid to equalise excessive differential pressures between the system and exterior. The port 56 is formed in a resilient diaphragm 44, preferably by means of a needle and inserts 42 and 46 have concave faces 50, 52 which govern the degree of flexiblity of the diaphragm and therefore the differential pressure necessary to open the port. In an alternative embodiment, Fig 3, the port 62 is formed in the diaphragm pressure compensator 60 of the lubricating system. Plates having flowrestricting orifices (86, 90), Fig 6 (not shown), may be provided to prevent excessive flow rates through the port and therefore tearing of the diaphragm.
GB2655973A 1973-06-04 1973-06-04 Pressure relief device for drill bit lubrication system Expired GB1407378A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2655973A GB1407378A (en) 1973-06-04 1973-06-04 Pressure relief device for drill bit lubrication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2655973A GB1407378A (en) 1973-06-04 1973-06-04 Pressure relief device for drill bit lubrication system

Publications (1)

Publication Number Publication Date
GB1407378A true GB1407378A (en) 1975-09-24

Family

ID=10245547

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2655973A Expired GB1407378A (en) 1973-06-04 1973-06-04 Pressure relief device for drill bit lubrication system

Country Status (1)

Country Link
GB (1) GB1407378A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2396152A1 (en) * 1977-07-01 1979-01-26 Dresser Ind CLOSED LUBRICATION CIRCUIT, INCLUDING AN EXPANSION VOLUME, FOR ROCK TREPAN
CN115538946A (en) * 2022-12-05 2022-12-30 西南石油大学 Roller cone type composite PDC drill bit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2396152A1 (en) * 1977-07-01 1979-01-26 Dresser Ind CLOSED LUBRICATION CIRCUIT, INCLUDING AN EXPANSION VOLUME, FOR ROCK TREPAN
CN115538946A (en) * 2022-12-05 2022-12-30 西南石油大学 Roller cone type composite PDC drill bit
CN115538946B (en) * 2022-12-05 2023-01-31 西南石油大学 Roller cone type composite PDC drill bit

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee