WO1999010621B1 - Cutting insert and milling tool for use in a wellbore - Google Patents

Cutting insert and milling tool for use in a wellbore

Info

Publication number
WO1999010621B1
WO1999010621B1 PCT/GB1998/002464 GB9802464W WO9910621B1 WO 1999010621 B1 WO1999010621 B1 WO 1999010621B1 GB 9802464 W GB9802464 W GB 9802464W WO 9910621 B1 WO9910621 B1 WO 9910621B1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting insert
chipbreaking
spaced
apart
indentations
Prior art date
Application number
PCT/GB1998/002464
Other languages
French (fr)
Other versions
WO1999010621A1 (en
Inventor
Thurman B Carter
Shane P Hart
Robert Taylor
Original Assignee
Weatherford Lamb
Lucas Brian Ronald
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 Weatherford Lamb, Lucas Brian Ronald filed Critical Weatherford Lamb
Priority to DE69808949T priority Critical patent/DE69808949T2/en
Priority to AU88144/98A priority patent/AU8814498A/en
Priority to CA002300834A priority patent/CA2300834C/en
Priority to EP98939735A priority patent/EP1015731B1/en
Publication of WO1999010621A1 publication Critical patent/WO1999010621A1/en
Publication of WO1999010621B1 publication Critical patent/WO1999010621B1/en

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
    • E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
    • 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
    • E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/24—Cutters, for shaping with chip breaker, guide or deflector
    • Y10T407/245—Cutters, for shaping with chip breaker, guide or deflector comprising concave surface in cutting face of tool

Abstract

A cutting insert (610) for a tool for wellbore milling operations, the cutting insert (610) comprising: a body (612) having a top; a plurality of spaced-apart chipbreaking indentations (614) in the top of the body; and a strengthening ridge (618) projecting from the top of the body between adjacent chipbreaking indentations of the plurality of spaced-apart chipbreaking indentations.

Claims

AMENDED CLAIMS[received by the International Bureau on 8 February 1999 (08.02.99); original claim 1 amended; remaining claims unchanged (3 pages)]
1. A cutting insert for a tool for wellbore milling operations, the cutting insert comprising: - a body having a top; a plurality of spaced-apart chipbreaking indentations in the top of the body; and a strengthening ridge projecting from the top of the body between adjacent chipbreaking indentations of the plurality of spaced-apart chipbreaking indentations, the arrangement being such that in use, said strengthening ridge inhibits the propagation of cracks across said cutting insert.
2. A cutting insert as claimed in Claim 1, further comprising a peripheral strengthening ridge around an outer edge of the top of the body surrounding the plurality of spaced-apart chipbreaking indentations.
3. A cutting insert as claimed in Claim 1 or 2, wherein said spaced-apart chipbreaking indentations extend substantially across the entire top of the body.
4. A cutting insert as claimed in Claim 1, 2 or 3 , wherein each of the plurality of spaced-apart chipbreaking indentations is substantially-circular outline with a similar diameter and is spaced-apart from at least one other of the plurality of spaced-apart chipbreaking indentations by a distance at least equal to the diameter of the chipbreaking indentations.
5. A cutting insert as claimed in any preceding Claim, further comprising a central indentation surrounded by the plurality of spaced-apart chipbreaking indentations.
6. A cutting insert as claimed in any preceding Claim, wherein said body is one of circular, square, triangular, and rectangular.
7. a cutting insert as claimed in any of Claims 1 to 5, wherein said body is of chevron shape.
8. A cutting insert as claimed in Claim 7, wherein said body has a lower curved edge and two upper curved edges, each of the upper curved edges corresponding substantially in shape to a portion of the lower curved edge.
9. A cutting insert for a tool for wellbore milling operations, the cutting insert comprising: - a body having a top; at least one chipbreaking indentation in the top of the body; and the at least one chipbreaking indentation having a substantially semicircular shape.
10. A cutting insert as claimed in Claim 9 or 10, wherein the at least one chipbreaking indentation is at least two spaced-apart semi-circular chipbreaking indentations.
11. A cutting insert as claimed in Claim 9 or 10, wherein the body is chevron shaped and has a lower curved edge and two upper curved edges, each of the upper curved edges corresponding substantially compli- mentarily in shape to a portion of the lower curved edge.
12. A cutting insert for a tool for wellbore milling operation, the cutting insert comprising: - a body having a chevron-shaped base.
13. An array of cutting inserts comprising a plurality of adjacent cutting inserts as claimed in any preceding Claim.
14. A tool for wellbore milling operations, the tool comprising a mill body, at least one milling surface on the mill body, and an array of cutting inserts as claimed in Claim 14 secured to the at least one milling surface of the mill body.
PCT/GB1998/002464 1997-08-21 1998-08-21 Cutting insert and milling tool for use in a wellbore WO1999010621A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE69808949T DE69808949T2 (en) 1997-08-21 1998-08-21 CUTTING ELEMENT AND MILLING TOOL FOR USE IN A HOLE
AU88144/98A AU8814498A (en) 1997-08-21 1998-08-21 Cutting insert and milling tool for use in a wellbore
CA002300834A CA2300834C (en) 1997-08-21 1998-08-21 Cutting insert and milling tool for use in a wellbore
EP98939735A EP1015731B1 (en) 1997-08-21 1998-08-21 Cutting insert and milling tool for use in a wellbore

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/915,836 US5984005A (en) 1995-09-22 1997-08-21 Wellbore milling inserts and mills
US08/915,836 1997-08-21

Publications (2)

Publication Number Publication Date
WO1999010621A1 WO1999010621A1 (en) 1999-03-04
WO1999010621B1 true WO1999010621B1 (en) 1999-04-08

Family

ID=25436327

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/002464 WO1999010621A1 (en) 1997-08-21 1998-08-21 Cutting insert and milling tool for use in a wellbore

Country Status (6)

Country Link
US (1) US5984005A (en)
EP (1) EP1015731B1 (en)
AU (1) AU8814498A (en)
CA (1) CA2300834C (en)
DE (1) DE69808949T2 (en)
WO (1) WO1999010621A1 (en)

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Also Published As

Publication number Publication date
CA2300834A1 (en) 1999-03-04
EP1015731B1 (en) 2002-10-23
EP1015731A1 (en) 2000-07-05
US5984005A (en) 1999-11-16
AU8814498A (en) 1999-03-16
CA2300834C (en) 2005-10-11
DE69808949D1 (en) 2002-11-28
WO1999010621A1 (en) 1999-03-04
DE69808949T2 (en) 2003-06-12

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