EP0548163B1 - Self-shaping drill cutting edge - Google Patents
Self-shaping drill cutting edge Download PDFInfo
- Publication number
- EP0548163B1 EP0548163B1 EP91916192A EP91916192A EP0548163B1 EP 0548163 B1 EP0548163 B1 EP 0548163B1 EP 91916192 A EP91916192 A EP 91916192A EP 91916192 A EP91916192 A EP 91916192A EP 0548163 B1 EP0548163 B1 EP 0548163B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grooves
- cutting edge
- bit according
- support
- self
- 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
- 238000007493 shaping process Methods 0.000 title abstract 2
- 239000011435 rock Substances 0.000 claims abstract description 10
- 230000001154 acute effect Effects 0.000 claims abstract description 5
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 238000005553 drilling Methods 0.000 abstract description 5
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 241000135309 Processus Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000004459 forage Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
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
- E21B10/46—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 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
- E21B10/006—Drill bits providing a cutting edge which is self-renewable during drilling
-
- 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
- E21B10/46—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
-
- 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
Definitions
- the present invention relates to an oil or mining drilling tool according to the preamble of claim 1.
- the support can be constituted by a stud, crimped in the body of the tool, or on a tungsten carbide matrix.
- the increased force applied to the tool may cause partial destruction or loss of the cutting edges by heating.
- Patent EP-A-0 363 313 describes a tool comprising rupture zones formed on elements which, by breaking, make it possible to enlarge the openings for the passage of a lubricating liquid.
- the object of the present invention is to remedy these drawbacks by proposing self-sharpening cutters, that is to say which are liable to break along surfaces having favorable orientations, each time the force applied to the tool becomes greater than a given threshold.
- the subject of the invention is a drill bit cutter according to the characterizing part of claim 1.
- the clearance angle is preferably between 25 and 55 °.
- the tool 10 comprises a steel body 12 carrying on its side wall a plurality of cutters 14 arranged in several rows.
- the tool ends with a threaded portion 16 intended for connection with the rotation drive casing, not shown.
- each cutter 14 is crimped into one end of a substantially cylindrical stud 18, the other end of which is itself crimped onto the body 12.
- the cutter is in the form of a wafer circular comprising a first diamond-coated polycrystalline layer 22, which is bonded, by means of an appropriate binder, to a second layer 24 of tungsten carbide.
- Each groove comprises two branches (only one being visible in FIG. 2) which descend from the cutting edge 14 into the stud, symmetrically with respect to the mediating plane of the cutting edge, and which meet at the back of the stud.
- Each groove thus defines a preferential breaking surface of the cutter and the stud.
- the weakening of the cutting edge is ensured by the choice of orientation, dimensions and positioning of the grooves. Breaking according to a given breaking surface occurs when the cutter has undergone a certain degree of wear and a predetermined load is applied to it.
- FIG 2 there is shown a cutter fixed on stud free of any wear, and designated by 28 the rock formation to be drilled and by arrow f the direction of movement of the cutter. Initially, the upper face makes an acute angle fleeing ⁇ with the wall of the rock formation, so that only the cutter 14 attacks the rock. The efficiency of the cutting edge is then optimum.
- FIG. 3 shows the cutter and the stud in a later state.
- the entire upper part of the cutter and the stud has been worn by the rock. Contact with the rock formation is now made by the entire upper flat surface 30.
- the cutting edge efficiency decreases. If a greater load is applied to maintain the same efficiency, the cutting edge and the stud are broken according to the surface containing the first groove 261.
- the cutter then takes the sharpened shape shown in FIG. 4. Again, it has its maximum efficiency since it attacks the rock under the acute angle ⁇ which is clearly greater than the limit angle ⁇ indicated previously,
- the number of grooves can be any. In FIG. 2, only five have been indicated, by way of nonlimiting example.
- their spacing as well as their depth can also vary within wide limits, for example between 0.1 and 10 mm.
- the grooves all have the same width and the same depth.
- the grooves can define parallel planar surfaces, as in FIGS. 7 and 8 where, due to the perspective, only parallel rectilinear portions of grooves are seen.
- the grooves 26c are formed in perspective by broken lines formed by "straight" sections.
- the grooves 26d are curved so that successive breaks are made on concave surfaces.
- the grooves can have their origin on the cutter 14 near the crystal diamond zone ( Figures 8, 10 and 11), on the stud 18 ( Figure 7), or alternatively on the cutter and on the support ( Figure 9 ).
- the grooves may be discontinuous in the form of dots or lines.
- the grooves can go all around the cutter and the stud or only a part only of the latter.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Drilling Tools (AREA)
Abstract
Description
La présente invention concerne un outil de forage pétrolier ou minier selon le préambule de la revendication 1. Le support peut être constitué par un plot, serti dans le corps de l'outil, ou sur une matrice en carbure de tungstène.The present invention relates to an oil or mining drilling tool according to the preamble of claim 1. The support can be constituted by a stud, crimped in the body of the tool, or on a tungsten carbide matrix.
Un outil de ce type est connu par le brevet US-A- 4 844 185.A tool of this type is known from US-A-4,844,185.
Toutefois, par l'utilisation d'un tel outil dans les conditions difficiles qui prévalent dans le forage pétrolier ou minier peut occasionner la destruction des taillants, notamment par usure normale, par impact à la suite de surcharges ou encore par suite d'échauffement excessif.However, by the use of such a tool in the difficult conditions prevailing in oil or mining drilling can cause the destruction of the cutters, in particular by normal wear, by impact following overloads or even as a result of excessive heating. .
Lorsque les taillants sont usés, leur surface de contact avec la roche à forer est plus élevée, de sorte que l'efficacité de l'outil est nettement réduite. Pour garder une certaine efficacité, on doit appliquer à l'outil un effort plus important, mais alors on risque de provoquer ainsi une cassure des taillants par suite de surcharge. Cette cassure est souvent franche et orientée dans des directions très aléatoires, qui peuvent être soit favorables ou au contraire néfastes. La cassure est bien orientée lorsqu'elle a pour origine la zone située juste à l'arrière de la couche polycristalline en diamant par rapport au sens de déplacement du taillant, et qu'elle fait un angle de dépouille aigu avec la surface de la formation rocheuse.When the cutters are worn, their contact surface with the rock to be drilled is higher, so that the efficiency of the tool is significantly reduced. To maintain a certain efficiency, a greater effort must be applied to the tool, but then there is a risk of causing cutting of the cutters as a result of overload. This break is often frank and oriented in very random directions, which can be either favorable or on the contrary harmful. The break is well oriented when it originates from the area located just behind the polycrystalline diamond layer in relation to the direction of movement of the cutting edge, and when it makes an acute draft angle with the surface of the formation rocky.
De plus, l'effort accru appliqué à l'outil risque de provoquer la destruction partielle ou la perte des taillants par échauffement.In addition, the increased force applied to the tool may cause partial destruction or loss of the cutting edges by heating.
Par les brevets US-A- 4 277 106 et GB-A-2055411 on connaît un outil muni de taillants comportant des zones dures alternées avec des zones moins dures.From patents US-A-4,277,106 and GB-A-2,055,411 there is known a tool provided with cutters comprising hard zones alternated with less hard zones.
Le brevet EP-A- 0 363 313 décrit un outil comprenant des zones de rupture formées sur des éléments qui, en se brisant, permettent d'agrandir des ouvertures de passage d'un liquide de lubrification.Patent EP-A-0 363 313 describes a tool comprising rupture zones formed on elements which, by breaking, make it possible to enlarge the openings for the passage of a lubricating liquid.
Mais aucun de ces brevets ne permet de remédier au problème susmentionné qui est celui de la rupture de taillants selon des surfaces à orientations favorables. La présente invention a pour but de remédier à ces inconvénients en proposant des taillants auto-affûtables, c'est-à-dire qui sont susceptibles de se briser selon des surfaces ayant des orientations favorables, chaque fois que l'effort appliqué à l'outil devient supérieur à un seuil donné.However, none of these patents makes it possible to remedy the aforementioned problem which is that of the cutting of cutters along surfaces with favorable orientations. The object of the present invention is to remedy these drawbacks by proposing self-sharpening cutters, that is to say which are liable to break along surfaces having favorable orientations, each time the force applied to the tool becomes greater than a given threshold.
A cet effet, l'invention a pour objet un taillant d'outil de forage selon la partie caractérisante de la revendication 1.To this end, the subject of the invention is a drill bit cutter according to the characterizing part of claim 1.
L'angle de dépouille est de préférence compris entre 25 et 55°.The clearance angle is preferably between 25 and 55 °.
D'autres caractéristiques et avantages de l'invention ressortiront de la description qui va suivre, faite en regard des dessins annexés dans lesquels :
- La figure 1 est une vue en perspective d'un outil de forage d'un type connu;
- La figure 2 est une vue en perspective d'un taillant fixé sur plot, les rainures étant formées à la fois sur ces deux éléments;
- Les figures 3 à 6 montrent des phases successives du processus d'affûtage du taillant et du plot de la figure 2;
- Les figures 7 à 11 sont des vues en élévation de plusieurs variantes de formation des rainures sur le taillant et sur le plot.
- Figure 1 is a perspective view of a drilling tool of a known type;
- Figure 2 is a perspective view of a cutter attached to the stud, the grooves being formed on both of these two elements;
- Figures 3 to 6 show successive phases of the sharpening process of the cutter and the stud of Figure 2;
- Figures 7 to 11 are elevational views of several variants of formation of the grooves on the cutter and on the stud.
Avec référence à la figure 1, l'outil 10 comprend un corps en acier 12 portant sur sa paroi latérale une pluralité de taillants 14 disposés sur plusieurs rangées. L'outil se termine par une portion filetée 16 destinée à la connexion avec le tubage d'entraînement en rotation, non représenté.With reference to FIG. 1, the
Comme le montre la figure 2, chaque taillant 14 est serti dans une extrémité d'un plot 18 sensiblement cylindrique, dont l'autre extrémité est elle-même sertie sur le corps 12. Le taillant est en forme de plaquette circulaire comprenant une première couche polycristalline diamantée 22, qui est liée, au moyen d'un liant approprié, à une seconde couche 24 en carbure de tungstène.As shown in FIG. 2, each
Sur la paroi latérale du taillant 14 et du plot 18 sont imprimées plusieurs rainures 26, qui peuvent être parallèles entre elles. Chaque rainure comprend deux branches (une seule étant visible sur la figure 2) qui descendent depuis le taillant 14 jusque dans le plot, symétriquement par rapport au plan médiateur du taillant, et qui se rejoignent au dos du plot. Chaque rainure définit ainsi une surface de rupture préférentielle du taillant et du plot.
La fragilisation du taillant est assurée par le choix de l'orientation, des dimensions et du positionnement des rainures. La cassure selon une surface de rupture donnée s'effectue lorsque le taillant a subi un certain degré d'usure et qu'il lui est appliqué une charge prédéterminée.The weakening of the cutting edge is ensured by the choice of orientation, dimensions and positioning of the grooves. Breaking according to a given breaking surface occurs when the cutter has undergone a certain degree of wear and a predetermined load is applied to it.
Sur la figure 2, on a représenté un taillant fixé sur plot exempt de toute usure, et l'on a désigné par 28 la formation rocheuse à forer et par la flèche f la direction de déplacement du taillant. Initialement, la face supérieure fait un angle aigu fuyant β avec la paroi de la formation rocheuse, de sorte que seul le taillant 14 attaque la roche. L'efficacité du taillant est alors optimum.In Figure 2, there is shown a cutter fixed on stud free of any wear, and designated by 28 the rock formation to be drilled and by arrow f the direction of movement of the cutter. Initially, the upper face makes an acute angle fleeing β with the wall of the rock formation, so that only the
La figure 3 montre le taillant et le plot dans un état ultérieur. Toute la partie supérieure du taillant et du plot a été usée par la roche. Le contact avec la formation rocheuse se fait à présent par toute la surface plane supérieure 30. L'efficacité du taillant diminue. Si l'on applique une plus grande charge pour garder la même efficacité, on provoque une cassure du taillant et du plot selon la surface contenant la première rainure 26₁. Le taillant prend alors la forme affûtée montrée à la figure 4. A nouveau, il a son efficacité maximale puisqu'il attaque la roche sous l'angle aigu α qui est nettement supérieur à l'angle limite β indiqué précédemment,Figure 3 shows the cutter and the stud in a later state. The entire upper part of the cutter and the stud has been worn by the rock. Contact with the rock formation is now made by the entire upper
Au cours de l'utilisation ultérieure, le taillant s'use davantage et prend la forme illustrée à la figure 5. Il y apparaît une surface rabotée 32. A nouveau, la surface de contact avec la roche augmente et les efforts appliqués doivent être accrus, ce qui provoque la cassure du taillant et du plot selon la surface qui contient la seconde rainure 26₂. On obtient ainsi le taillant affûté de la figure 6.During subsequent use, the cutter wears more and takes the shape illustrated in FIG. 5. There appears a
Le processus d'usure-affûtage se poursuit de la même façon jusqu'à ce que la dernière rainure ait été atteinte.The wear-sharpening process continues in the same way until the last groove has been reached.
Le nombre de rainures peut être quelconque. Sur la figure 2, on n'en a indiqué, à titre d'exemple non limitatif, que cinq.The number of grooves can be any. In FIG. 2, only five have been indicated, by way of nonlimiting example.
Leur espacement ainsi que leur profondeur peut aussi varier dans de larges limites, par exemple entre 0,1 et 10 mm. Dans le mode de réalisation de la figure 7, les rainures ont toutes la même largeur et la même profondeur. Mais il est possible, comme dans le mode de réalisation de la figure 8, d'alterner des rainures profondes 26a avec des rainures moins profondes 26b.Their spacing as well as their depth can also vary within wide limits, for example between 0.1 and 10 mm. In the embodiment of Figure 7, the grooves all have the same width and the same depth. However, it is possible, as in the embodiment of FIG. 8, to alternate
Les rainures peuvent définir des surfaces planes parallèles, comme sur les figures 7 et 8 où l'on n'aperçoit, en raison de la perspective, que des portions rectilignes parallèles de rainures.The grooves can define parallel planar surfaces, as in FIGS. 7 and 8 where, due to the perspective, only parallel rectilinear portions of grooves are seen.
Sur la figure 10, les rainures 26c sont constituées en perspective par des lignes brisées formées de tronçons "rectilignes".In FIG. 10, the grooves 26c are formed in perspective by broken lines formed by "straight" sections.
Dans le mode de réalisation de la figure 11, les rainures 26d sont courbes de manière que les cassures successives s'effectuent selon des surfaces concaves.In the embodiment of Figure 11, the
Les rainures peuvent avoir leur origine sur le taillant 14 près de la zone cristalline en diamant (figures 8,10 et 11), sur le plot 18 (figure 7), ou encore de façon alternée sur le taillant et sur le support (figure 9).The grooves can have their origin on the
De nombreuses autres modifications de détail peuvent encore être apportées aux modes de réalisation décrits. Par exemple, les rainures peuvent être discontinues sous forme de points ou de traits. Les rainures peuvent faire tout le tour du taillant et du plot ou seulement d'une partie seulement de ces derniers.Many other modifications of detail can also be made to the embodiments described. For example, the grooves may be discontinuous in the form of dots or lines. The grooves can go all around the cutter and the stud or only a part only of the latter.
Claims (9)
- Drill bit (10) comprising a body (12) which is fitted with several supports (18), each carrying a self-sharpening cutting edge (14) in the shape of a small plate comprising a diamond-charged polycrystalline outer layer (22) deposited on a layer of tungsten carbide (24), characterized in that, on each cutting edge (14) and/or on its support (18), regions (26) of lower strength are formed, such as grooves, arranged so as to be able to initiate successive fractures making an acute relief angle (a) with the rock formation (28) to be drilled.
- Bit according to Claim 1, characterized in that the relief angle preferably lies between 25 and 55°.
- Bit according to Claim 1, characterized in that the grooves are mutually parallel.
- Bit according to Claim 1, characterized in that the grooves have the same width and the same depth.
- Bit according to Claim 1, characterized in that deep grooves (26a) are alternated with less deep grooves (26b).
- Bit according to Claim 1, characterized in that each groove comprises two branches which descend symmetrically from the cutting edge (14) just into the support (18), symmetrically with respect to the median plane of the cutting edge, and which join at the back of the support.
- Bit according to Claim 1, characterized in that the grooves (26a) are straight, so as to define planar break surfaces.
- Bit according to Claim 1, characterized in that the grooves are in the form of broken lines (26c), or curves (26d) and define concave break surfaces.
- Bit according to Claim 1, characterized in that the grooves are discontinuous, for example in the form of dots or dashes.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9011386 | 1990-09-14 | ||
| FR9011386A FR2666843B1 (en) | 1990-09-14 | 1990-09-14 | SIZE OF SELF-SHARPENING DRILLING TOOL. |
| PCT/FR1991/000720 WO1992005335A1 (en) | 1990-09-14 | 1991-09-12 | Self-shaping drill cutting edge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0548163A1 EP0548163A1 (en) | 1993-06-30 |
| EP0548163B1 true EP0548163B1 (en) | 1994-05-25 |
Family
ID=9400340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91916192A Expired - Lifetime EP0548163B1 (en) | 1990-09-14 | 1991-09-12 | Self-shaping drill cutting edge |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US5301762A (en) |
| EP (1) | EP0548163B1 (en) |
| JP (1) | JPH06500836A (en) |
| CA (1) | CA2091676A1 (en) |
| DE (1) | DE69102139T2 (en) |
| DK (1) | DK0548163T3 (en) |
| ES (1) | ES2053336T3 (en) |
| FR (1) | FR2666843B1 (en) |
| NO (1) | NO930907D0 (en) |
| WO (1) | WO1992005335A1 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5460233A (en) * | 1993-03-30 | 1995-10-24 | Baker Hughes Incorporated | Diamond cutting structure for drilling hard subterranean formations |
| US5590729A (en) * | 1993-12-09 | 1997-01-07 | Baker Hughes Incorporated | Superhard cutting structures for earth boring with enhanced stiffness and heat transfer capabilities |
| US5605198A (en) * | 1993-12-09 | 1997-02-25 | Baker Hughes Incorporated | Stress related placement of engineered superabrasive cutting elements on rotary drag bits |
| US5435403A (en) * | 1993-12-09 | 1995-07-25 | Baker Hughes Incorporated | Cutting elements with enhanced stiffness and arrangements thereof on earth boring drill bits |
| US5924501A (en) * | 1996-02-15 | 1999-07-20 | Baker Hughes Incorporated | Predominantly diamond cutting structures for earth boring |
| US5706906A (en) * | 1996-02-15 | 1998-01-13 | Baker Hughes Incorporated | Superabrasive cutting element with enhanced durability and increased wear life, and apparatus so equipped |
| US5967249A (en) * | 1997-02-03 | 1999-10-19 | Baker Hughes Incorporated | Superabrasive cutters with structure aligned to loading and method of drilling |
| US5881830A (en) * | 1997-02-14 | 1999-03-16 | Baker Hughes Incorporated | Superabrasive drill bit cutting element with buttress-supported planar chamfer |
| US6302224B1 (en) | 1999-05-13 | 2001-10-16 | Halliburton Energy Services, Inc. | Drag-bit drilling with multi-axial tooth inserts |
| AU2004237810B2 (en) * | 2003-12-16 | 2010-09-23 | Voest-Alpine Bergtechnik Gesellschaft M.B.H. | Roadheading or mining machine with roof bolt drilling and setting devices |
| US7373998B2 (en) * | 2004-04-01 | 2008-05-20 | Smith International, Inc. | Cutting element with improved cutter to blade transition |
| US8936109B2 (en) | 2010-06-24 | 2015-01-20 | Baker Hughes Incorporated | Cutting elements for cutting tools |
| CN103237617B (en) | 2010-07-23 | 2016-06-08 | 国民油井Dht公司 | Polycrystalline diamond cutting element and the method using it |
| US8997900B2 (en) | 2010-12-15 | 2015-04-07 | National Oilwell DHT, L.P. | In-situ boron doped PDC element |
| US20120199395A1 (en) * | 2011-02-07 | 2012-08-09 | Lynde Gerald D | Cutting elements having a pre-formed fracture plane for use in cutting tools |
| US10352103B2 (en) * | 2013-07-25 | 2019-07-16 | Ulterra Drilling Technologies, L.P. | Cutter support element |
| JP6468507B2 (en) * | 2013-11-28 | 2019-02-13 | 国立研究開発法人産業技術総合研究所 | PDC cutter for well drilling and PDC bit for well drilling |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3882749A (en) * | 1973-10-10 | 1975-05-13 | James C Tourek | Beavertooth cutting edge |
| US4227106A (en) * | 1976-03-04 | 1980-10-07 | Emerson Electric Co. | High voltage induction motor without ladder insulation between motor windings and method of construction therefor |
| DE2719330C3 (en) * | 1977-04-30 | 1984-01-05 | Christensen, Inc., 84115 Salt Lake City, Utah | Rotary drill bit |
| GB2055411B (en) * | 1979-08-07 | 1983-01-12 | Land & Marine Eng Ltd | Cutting picks |
| US4277106A (en) * | 1979-10-22 | 1981-07-07 | Syndrill Carbide Diamond Company | Self renewing working tip mining pick |
| US4324300A (en) * | 1980-06-30 | 1982-04-13 | Logan Jr Clifford K | Rotary drill bit |
| US4629373A (en) * | 1983-06-22 | 1986-12-16 | Megadiamond Industries, Inc. | Polycrystalline diamond body with enhanced surface irregularities |
| US4784023A (en) * | 1985-12-05 | 1988-11-15 | Diamant Boart-Stratabit (Usa) Inc. | Cutting element having composite formed of cemented carbide substrate and diamond layer and method of making same |
| GB8626919D0 (en) * | 1986-11-11 | 1986-12-10 | Nl Petroleum Prod | Rotary drill bits |
| GB2212190B (en) * | 1987-11-12 | 1991-12-11 | Reed Tool Co | Improvements in cutting structures for rotary drill bits |
| US4869330A (en) * | 1988-01-20 | 1989-09-26 | Eastman Christensen Company | Apparatus for establishing hydraulic flow regime in drill bits |
| DE3833767A1 (en) * | 1988-10-05 | 1990-04-12 | Hilti Ag | HOLLOW DRILLING TOOL FOR STONE |
-
1990
- 1990-09-14 FR FR9011386A patent/FR2666843B1/en not_active Expired - Lifetime
-
1991
- 1991-09-12 US US08/030,109 patent/US5301762A/en not_active Expired - Fee Related
- 1991-09-12 ES ES91916192T patent/ES2053336T3/en not_active Expired - Lifetime
- 1991-09-12 EP EP91916192A patent/EP0548163B1/en not_active Expired - Lifetime
- 1991-09-12 WO PCT/FR1991/000720 patent/WO1992005335A1/en active IP Right Grant
- 1991-09-12 DE DE69102139T patent/DE69102139T2/en not_active Expired - Fee Related
- 1991-09-12 CA CA002091676A patent/CA2091676A1/en not_active Abandoned
- 1991-09-12 JP JP3514957A patent/JPH06500836A/en active Pending
- 1991-09-12 DK DK91916192.7T patent/DK0548163T3/en active
-
1993
- 1993-03-12 NO NO930907A patent/NO930907D0/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ES2053336T3 (en) | 1994-07-16 |
| US5301762A (en) | 1994-04-12 |
| DE69102139T2 (en) | 1995-02-16 |
| JPH06500836A (en) | 1994-01-27 |
| FR2666843B1 (en) | 1992-12-24 |
| CA2091676A1 (en) | 1992-03-15 |
| DE69102139D1 (en) | 1994-06-30 |
| FR2666843A1 (en) | 1992-03-20 |
| EP0548163A1 (en) | 1993-06-30 |
| WO1992005335A1 (en) | 1992-04-02 |
| NO930907L (en) | 1993-03-12 |
| DK0548163T3 (en) | 1994-08-22 |
| NO930907D0 (en) | 1993-03-12 |
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