KR900000391U - 확공비드 - Google Patents

확공비드

Info

Publication number
KR900000391U
KR900000391U KR2019880009254U KR880009254U KR900000391U KR 900000391 U KR900000391 U KR 900000391U KR 2019880009254 U KR2019880009254 U KR 2019880009254U KR 880009254 U KR880009254 U KR 880009254U KR 900000391 U KR900000391 U KR 900000391U
Authority
KR
South Korea
Prior art keywords
expansion ball
ball
expansion
Prior art date
Application number
KR2019880009254U
Other languages
English (en)
Other versions
KR910009086Y1 (ko
Inventor
양형칠
Original Assignee
양형칠
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 양형칠 filed Critical 양형칠
Priority to KR2019880009254U priority Critical patent/KR910009086Y1/ko
Publication of KR900000391U publication Critical patent/KR900000391U/ko
Application granted granted Critical
Publication of KR910009086Y1 publication Critical patent/KR910009086Y1/ko

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
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
    • E21B10/325—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools the cutter being shifted by a spring mechanism
    • 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
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • 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
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • E21B10/627—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable with plural detachable cutting elements
    • E21B10/633—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable with plural detachable cutting elements independently detachable

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)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
KR2019880009254U 1988-06-16 1988-06-16 확공비드 KR910009086Y1 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019880009254U KR910009086Y1 (ko) 1988-06-16 1988-06-16 확공비드

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019880009254U KR910009086Y1 (ko) 1988-06-16 1988-06-16 확공비드

Publications (2)

Publication Number Publication Date
KR900000391U true KR900000391U (ko) 1990-01-17
KR910009086Y1 KR910009086Y1 (ko) 1991-11-25

Family

ID=19276356

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019880009254U KR910009086Y1 (ko) 1988-06-16 1988-06-16 확공비드

Country Status (1)

Country Link
KR (1) KR910009086Y1 (ko)

Also Published As

Publication number Publication date
KR910009086Y1 (ko) 1991-11-25

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Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 19941125

Year of fee payment: 4

LAPS Lapse due to unpaid annual fee