EP0350045B1 - Trépan avec éléments de coupe composites - Google Patents
Trépan avec éléments de coupe composites Download PDFInfo
- Publication number
- EP0350045B1 EP0350045B1 EP19890112388 EP89112388A EP0350045B1 EP 0350045 B1 EP0350045 B1 EP 0350045B1 EP 19890112388 EP19890112388 EP 19890112388 EP 89112388 A EP89112388 A EP 89112388A EP 0350045 B1 EP0350045 B1 EP 0350045B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting
- face
- drill bit
- laterally adjacent
- 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.)
- Expired - Lifetime
Links
Images
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
- E21B10/5676—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts having a cutting face with different segments, e.g. mosaic-type inserts
Definitions
- the present invention relates to a rotary drill bit for drilling subterranean formations as characterized in the pre-characterizing portion of claim 1.
- Drill bits presently known to the industry which utilize stationary cutting members typically use either natural or synthetic diamonds as cutting elements, and are conventionally known as “diamond bits”. References herein to "diamond bits” or “diamond drill bits” refer to all bits, for either drilling or coring, having primarily stationary cutting members.
- Conventional diamond drill bits may have a variety of different types of cutting surfaces, such as, for example polycrystalline diamond compact (PDC) cutters, thermally stable diamond product (TSP) cutters, mosaic-type cutters and diamond impregnated stud cutters.
- Mosaic cutters are typically formed of a plurality of geometrically-shaped thermally stable diamond elements cooperatively arranged and bonded in a desired shape, to form a unitary cutting surface (EP-A-0 157 278).
- the diamond cutting surface is typically bonded to a supporting member, which is then secured to a carrier member which facilitates attachment to the drill bit.
- the cutting surface layer is preferably connected to the supporting member such as through use of brazing or sintering.
- the supporting member and the carrier member will both be formed of a suitable hard or sintered metal, such as, for example, tungsten carbide.
- the supporting member can be soldered or otherwise connected, such as by form sintering or hot isostatic pressing, to the carrier member (US-A- 4,498,549).
- drill bits may include more than one type of cutting member on a single bit.
- Some types of cutting surfaces are better adapted to cut specific formations than are others. For example, while large PDC-type cutters are extremely efficient at cutting shales and other similarly soft formations, they are quickly broken or abraded in hard formations. Other cutting surfaces, however, such as mosaic surfaces, will cut through the harder formations satisfactorily. Accordingly, some relatively recent diamond drill bit designs have included dual sets of cutting members, with each set composed of cutting members having different types of cutting surfaces.
- a first set of cutters is arranged on the bit to provide essentially full face coverage across the face of the bit, and a second set of cutters, of a different type, is arranged to provide coverage across at least a portion of the bit face.
- bits with dual cutter sets while performing exceptionally well in some applications, may not be feasible for use with all types of bits.
- bits having cutting members with large cutting surfaces, such as 2,5 centimeter (one inch) or greater in diameter it may not be feasible to include two sets of cutters on a single bit.
- the extra surface area could interfere with chip removal, or could raise the total bottom hole surface area contacting the formation to a level which would require an unacceptably high weight-on-bit to cut the formation.
- the present invention provides a drill bit as claimed in claim 1 including composite cutting surfaces on a single drill bit, whereby the exposed face of the cutting member may be maintained at a desired size, but whereby that face can be composed of different cutting surfaces adapted to perform differently in the earth formations.
- Figure 1 depicts a diamond drill bit having cutting members in accordance with the present invention.
- Figure 2 depicts that an isolated cutting member of the drill bit of Figure 1.
- Figures 3A-F depict exemplary alternative cutting faces for a cutting member in accordance with the present invention.
- Drill bit 10 includes a body section 12 which carries a plurality of cutting members 16.
- Body 12 is preferably a molded component fabricated through conventional metal matrix infiltration technology.
- Body section 12 is coupled to a shank 18 which includes a threaded portion 20.
- Shank 18 and body 12 are preferably formed to be functionally integral with one another.
- Drill bit 10 includes an internal recess (not illustrated), through which hydraulic fluid will flow.
- a plurality of nozzles 22 are placed in body 12 to distribute hydraulic flow proximate the faces of cutting members 16.
- the cutting face 24 of cutting member 16 includes two segments, 26 and 28.
- Cutting face segments 26 and 28 will each be formed of a layer of a cutting material, but will be formed of different types of cutting material.
- segment 26 may be a PDC cutting layer
- segment 28 may be a TSP cutting layer.
- Cutting face 24 of cutting member 16 may be formed of segments arranged in any of a variety of conformities, and such face segments may be formed of any of a variety suitable materials.
- the segment faces preferably lie in generally parallel planes, and most preferably will be coplanar as depicted in the drawing.
- Figures 3A-F therein are depicted exemplary alternative configurations and constructions for the cutting face of a cutting member 16 as depicted in Figures 1 and 2.
- Figure 3A depicts a cutting face 30 having a PDC face segment 32 and a mosaic face segment 34. The two segments 32 and 34 are symmetrically arranged relative to a vertical axis.
- Figure 3B depicts a face segment 36 having three generally vertically extending faces 38, 40 and 42, symmetrically arranged about a central vertical diameter.
- outer face segments 38 and 42 are of a first type of cutting surface, while central face segment 40 is of a second type of cutting surface.
- Figure 3C depicts a cutting face 44, which is similar in construction to cutting face 36 of Figure 3B, with the exception that the face segments 46, 48 and 50 are symmetrically disposed about a nonvertical diameter.
- Figure 3D depicts a two segment cutting face 52, with face segments distributed on either side of a horizontal diameter.
- upper segment 54 may be of a material such as a PDC layer
- lower segment 56 may be of a different material, such as a TSP or mosaic material.
- Figure 3E depicts an exemplary embodiment where the cutting face 58 is divided into a plurality of quadrant face segments 60, 62, 64 and 66.
- These face segments 60, 62, 64 and 66 can be formed, for example, of two alternating cutting layer materials or could all be formed of different cutting layer materials.
- Figure 3F depicts an embodiment similar to that of Figures 3B and 3C, with the exception that the three face segments of cutting face 68 are disposed symmetrically relative to a horizontal diametrical axis.
Claims (3)
- Trépan de forage rotary (10) pour le forage de formations souterraines comprenant un corps (12) fixé à un embout (18) pour faire tourner ledit trépan (10) autour d'un axe longitudinal, une pluralité d'éléments de coupe (16) disposés sur ledit corps (12), lesdits éléments de coupe (16) comprenant chacun une face de coupe (24, 30, 36, 58) dirigée essentiellement dans le sens de rotation du trépan et ladite face de coupe (24, 30, 36, 58) présentant un bord de coupe, caractérisé en ce que ladite face de coupe (24, 30, 36, 58) comprend au moins deux surfaces de coupe différentes voisines latéralement (32, 34, 38, 40, 42, 46, 50, 60, 62) à même d'agir différemment dans lesdites formations souterraines, une desdites au moins deux surfaces de coupe voisines latéralement étant essentiellement faite d'une matière en diamant polycristallin choisie dans le groupe comprenant : une matière compacte en diamant polycristallin, une matière en diamant thermiquement stable et une matière en diamant mosaïque; et au moins une autre desdites au moins deux surfaces de coupe voisines latéralement étant faite d'une autre matière différente choisie dans ledit groupe, lesdites surfaces de coupe étant orientées sur ledit corps (12) de telle sorte que ledit bord de coupe comprenne des secteurs d'au moins deux matières choisies, différentes.
- Trépan de forage rotary (10) suivant la revendication 1, dans lequel lesdits segments de face de coupe voisins latéralement (32, 34, 38, 40, 42, 46, 48, 50, 60, 62) dudit élément de coupe (10) sont disposés dans des plans globalement parallèles.
- Trépan de forage rotary (10) suivant la revendication 1, dans lequel lesdits segments de face de coupe voisins latéralement (32, 34, 38, 40, 42, 46, 48, 50, 60, 62) de chaque élément de coupe (16) sont globalement coplanaires.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US21549988A | 1988-07-06 | 1988-07-06 | |
US215499 | 1988-07-06 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0350045A2 EP0350045A2 (fr) | 1990-01-10 |
EP0350045A3 EP0350045A3 (en) | 1990-06-06 |
EP0350045B1 true EP0350045B1 (fr) | 1996-01-17 |
Family
ID=22803218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890112388 Expired - Lifetime EP0350045B1 (fr) | 1988-07-06 | 1989-07-06 | Trépan avec éléments de coupe composites |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0350045B1 (fr) |
CA (1) | CA1311745C (fr) |
DE (1) | DE68925439T2 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5238074A (en) * | 1992-01-06 | 1993-08-24 | Baker Hughes Incorporated | Mosaic diamond drag bit cutter having a nonuniform wear pattern |
ZA935525B (en) * | 1992-08-06 | 1994-02-24 | De Beers Ind Diamond | Tool insert |
GB9827600D0 (en) * | 1998-12-15 | 1999-02-10 | De Beers Ind Diamond | Abrasive product |
US6248447B1 (en) * | 1999-09-03 | 2001-06-19 | Camco International (Uk) Limited | Cutting elements and methods of manufacture thereof |
US8991525B2 (en) * | 2012-05-01 | 2015-03-31 | Baker Hughes Incorporated | Earth-boring tools having cutting elements with cutting faces exhibiting multiple coefficients of friction, and related methods |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3111156C1 (de) * | 1981-03-21 | 1983-04-14 | Christensen, Inc., 84115 Salt Lake City, Utah | Schneidglied fuer Drehbohrmeissel zum Tiefbohren in Erdformationen |
AU3946885A (en) * | 1984-03-26 | 1985-10-03 | Norton Christensen Inc. | Cutting element using polycrystalline diamond disks |
GB8612012D0 (en) * | 1986-05-16 | 1986-06-25 | Nl Petroleum Prod | Rotary drill bits |
-
1989
- 1989-07-06 DE DE1989625439 patent/DE68925439T2/de not_active Expired - Fee Related
- 1989-07-06 CA CA000604897A patent/CA1311745C/fr not_active Expired - Lifetime
- 1989-07-06 EP EP19890112388 patent/EP0350045B1/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE68925439T2 (de) | 1996-08-22 |
EP0350045A2 (fr) | 1990-01-10 |
DE68925439D1 (de) | 1996-02-29 |
EP0350045A3 (en) | 1990-06-06 |
CA1311745C (fr) | 1992-12-22 |
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