CA2505828A1 - Modified cutters - Google Patents

Modified cutters Download PDF

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Publication number
CA2505828A1
CA2505828A1 CA002505828A CA2505828A CA2505828A1 CA 2505828 A1 CA2505828 A1 CA 2505828A1 CA 002505828 A CA002505828 A CA 002505828A CA 2505828 A CA2505828 A CA 2505828A CA 2505828 A1 CA2505828 A1 CA 2505828A1
Authority
CA
Canada
Prior art keywords
cutter
base portion
ultrahard layer
cutting face
drill bit
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.)
Granted
Application number
CA002505828A
Other languages
French (fr)
Other versions
CA2505828C (en
Inventor
Youhe Zhang
Yuelin Shen
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.)
Smith International Inc
Original Assignee
Smith International, Inc.
Youhe Zhang
Yuelin Shen
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 US11/117,647 external-priority patent/US20050247486A1/en
Application filed by Smith International, Inc., Youhe Zhang, Yuelin Shen filed Critical Smith International, Inc.
Publication of CA2505828A1 publication Critical patent/CA2505828A1/en
Application granted granted Critical
Publication of CA2505828C publication Critical patent/CA2505828C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts
    • E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • E21B10/5673—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts having a non planar or non circular cutting face
    • 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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • 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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts
    • E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • E21B10/573—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element
    • E21B10/5735—Interface between the substrate and the cutting element

Abstract

A modified cutting element that includes a base portion, an ultrahard layer disposed on said base portion, and at least one modified region disposed adjacent to a cutting face of the cutter is described. In certain applications, the ultrahard layer comprises thermally stable polycrystalline diamond.

Claims (12)

1. A cutter comprising:

a base portion;

an ultrahard layer disposed on said base portion; and at least one modified region disposed adjacent to a cutting face of the cutter.
2. The cutter of claim 1, wherein the ultrahard layer comprises thermally stable polycrystalline diamond.
3. The cutter of claim 1, further comprising a beveled edge disposed on said cutting face.
4. The cutter of claim 3, wherein the beveled edge has a thickness .005 inches to .050 inches.
5. A drill bit comprising:

a bit body; and at least one cutter, the at least one cutter comprising a base portion, an ultrahard layer disposed on said base portion, and at least one modified region disposed adjacent to a cutting face of the cutter.
6. The drill bit of claim 5, wherein the ultrahard layer comprises thermally stable polycrystalline diamond.
7. The drill bit of claim 5, further comprising a beveled edge disposed on said cutting face.
8. The drill bit of claim 7, wherein the beveled edge has a thickness .005 inches to .050 inches.
9. A method of drilling, comprising:

contacting a formation with a drill bit, wherein the drill bit comprises a bit body; and at least one cutter, the at least one cutter comprising a base portion, an ultrahard layer disposed on said base portion, and at least one modified region disposed adjacent to a cutting face of the cutter.
10. A method of forming a modified cutter, comprising:

providing an unmodified cutter, the unmodified cutter comprising an ultrahard layer disposed on a base portion;

removing a selected portion of the ultrahard layer, adjacent to a cutting face of said cutter.
11. The method of claim 10, wherein removing comprises electrical discharge machining the ultrahard layer.
12. The method of claim 10, wherein the ultrahard layer comprises thermally stable polycrystalline diamond.
CA2505828A 2004-04-30 2005-04-29 Modified cutters Active CA2505828C (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US56675104P 2004-04-30 2004-04-30
US60/566,751 2004-04-30
US58430704P 2004-06-30 2004-06-30
US60/584,307 2004-06-30
US64886305P 2005-02-01 2005-02-01
US60/648,863 2005-02-01
US11/117,647 2005-04-28
US11/117,647 US20050247486A1 (en) 2004-04-30 2005-04-28 Modified cutters

Publications (2)

Publication Number Publication Date
CA2505828A1 true CA2505828A1 (en) 2005-10-30
CA2505828C CA2505828C (en) 2012-09-25

Family

ID=34682187

Family Applications (3)

Application Number Title Priority Date Filing Date
CA2505828A Active CA2505828C (en) 2004-04-30 2005-04-29 Modified cutters
CA2505709A Active CA2505709C (en) 2004-04-30 2005-04-29 Cutter having shaped working surface with varying edge chamfer
CA2505710A Active CA2505710C (en) 2004-04-30 2005-04-29 Shaped cutter surface

Family Applications After (2)

Application Number Title Priority Date Filing Date
CA2505709A Active CA2505709C (en) 2004-04-30 2005-04-29 Cutter having shaped working surface with varying edge chamfer
CA2505710A Active CA2505710C (en) 2004-04-30 2005-04-29 Shaped cutter surface

Country Status (3)

Country Link
US (2) US7726420B2 (en)
CA (3) CA2505828C (en)
GB (1) GB2424017B (en)

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GB2424017A (en) 2006-09-13
CA2505828C (en) 2012-09-25
US8037951B2 (en) 2011-10-18
CA2505709C (en) 2011-09-13
US7726420B2 (en) 2010-06-01
GB0609713D0 (en) 2006-06-28
GB2424017B (en) 2007-01-31
CA2505710C (en) 2011-06-14
CA2505710A1 (en) 2005-10-30
US20110031030A1 (en) 2011-02-10
US20050247492A1 (en) 2005-11-10
CA2505709A1 (en) 2005-10-30

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