GB643197A - Underreamer - Google Patents

Underreamer

Info

Publication number
GB643197A
GB643197A GB10260/48A GB1026048A GB643197A GB 643197 A GB643197 A GB 643197A GB 10260/48 A GB10260/48 A GB 10260/48A GB 1026048 A GB1026048 A GB 1026048A GB 643197 A GB643197 A GB 643197A
Authority
GB
United Kingdom
Prior art keywords
slot
blade
blades
sides
reamer
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
GB10260/48A
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.)
Baker Hughes Oilfield Operations LLC
Original Assignee
Baker Oil Tools 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 Baker Oil Tools Inc filed Critical Baker Oil Tools Inc
Priority to GB10260/48A priority Critical patent/GB643197A/en
Publication of GB643197A publication Critical patent/GB643197A/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
    • E21B10/26—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
    • E21B10/322—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 cutter shifted by fluid pressure

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)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)

Abstract

643,197. Earth-boring apparatus; under-reamers. DEHN, S. G. (Baker Oil Tools, Inc.). April 13, 1948, No. 10260. [Class 85] In an under-reamer of the type having pivoted reamer blades 15 housed in a slot 14 formed in the body 10 of the tool and rotated when desired to extend beyond the body, the lowermost portions 14a of the sides of the slot diverge outwardly from the adjacent blade in the direction of outward movement of the blade so that jamming of the blade in the slot, due to mud packing therein during lowering, is minimised. The upper portions 14b of the sides of the slot are parellel to the sides of the blades thus providing support to the blades when they are in their expanded position. The side of the blade adjacent the side of the slot may also be relieved. Specification 643,196 is referred to.
GB10260/48A 1948-04-13 1948-04-13 Underreamer Expired GB643197A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB10260/48A GB643197A (en) 1948-04-13 1948-04-13 Underreamer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB10260/48A GB643197A (en) 1948-04-13 1948-04-13 Underreamer

Publications (1)

Publication Number Publication Date
GB643197A true GB643197A (en) 1950-09-15

Family

ID=9964589

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10260/48A Expired GB643197A (en) 1948-04-13 1948-04-13 Underreamer

Country Status (1)

Country Link
GB (1) GB643197A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2365888A (en) * 2000-08-11 2002-02-27 Renovus Ltd Expandable Drilling Apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2365888A (en) * 2000-08-11 2002-02-27 Renovus Ltd Expandable Drilling Apparatus
GB2365888B (en) * 2000-08-11 2002-07-24 Renovus Ltd Drilling apparatus
US7681667B2 (en) 2000-08-11 2010-03-23 Weatherford/Lamb, Inc. Drilling apparatus

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