CA1161028A - Drill bit for deep well drilling - Google Patents
Drill bit for deep well drillingInfo
- Publication number
- CA1161028A CA1161028A CA000382747A CA382747A CA1161028A CA 1161028 A CA1161028 A CA 1161028A CA 000382747 A CA000382747 A CA 000382747A CA 382747 A CA382747 A CA 382747A CA 1161028 A CA1161028 A CA 1161028A
- Authority
- CA
- Canada
- Prior art keywords
- fact
- rotary drill
- cutting
- drill tool
- tool according
- 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
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 31
- 239000010959 steel Substances 0.000 claims abstract description 31
- 238000005520 cutting process Methods 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000011159 matrix material Substances 0.000 claims description 34
- 239000000126 substance Substances 0.000 claims description 20
- 239000010432 diamond Substances 0.000 claims description 12
- 238000005299 abrasion Methods 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 9
- 229910003460 diamond Inorganic materials 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 8
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 230000003628 erosive effect Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000007750 plasma spraying Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000010285 flame spraying Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000005552 hardfacing Methods 0.000 abstract 2
- 150000001875 compounds Chemical class 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229940126214 compound 3 Drugs 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- -1 e.g. Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
-
- 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
-
- 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
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
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)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Earth Drilling (AREA)
- Drilling Tools (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
ABSTRACT
A rotary bit for oil and gas well drilling has cutting elements set in a hard facing material which in turn is supported by a sintered steel section between the hard facing and the steel base of the bit.
A rotary bit for oil and gas well drilling has cutting elements set in a hard facing material which in turn is supported by a sintered steel section between the hard facing and the steel base of the bit.
Description
Docket CH-6019 DRI LL TOOL FOR DEEP WELLS
The subject of the invention is a rotary drill tool for deep wells consisting of a threaded stud for a connection with a drill string or with a steel connect-ing body including a similar rotary drive, whose head is 5 provided with c~tting members, which extend from the base region of the head into its retracted central region, which are collected in projecting row or strip-l;ke groups over the exterior surface of the tool and are supported in a bonding substance.
In known rotary drill tools of this typ~, the cutting members of natural or synthetic diamond or poly-crystalline diamond are supported in a matrix bonding substance which is mounted on the steel connecting body.
Usually tungsten carbide alloyed with copper is used as 15 the bond in the matrix bonding substance. This material possesses a high erosion and abrasion resistance but is very expensive due to its cemented carbide content.
In spite of this, a great layer thickness is required to absorb the thermal stresses which arise in 20 the manufa~turing process to prevent crack formation, so that the amDunt of expensive and scarce matrix material required is attributable as a disadvantage of known rotary ~ drill tools.
`~ The task which is basic to the invention consists, 25 with a rotary drill tool of the above-named type, of arrang-ing the matrix bonding compound in such a way that the pro-'' ~
-` ~6~2~
portion of expensive material can be reduced w;thout reduc-ing the mechanical properties of the tool.
This task is solved in a rotary drill tool of the above-named type by the fact that the arrangement of the 5 matrix bonding substance in the region of the protruding strip or row-like groups with cutting members or cutting coatings is reduced, that the matrix bonding substance is formed as a layer, and that the space between the above-named layer and the steel connecting body is provided with 10 a filler, e.g., steel.
The web or rib-like construction of the blades which surroun~ the matrix bonding subtance has as a conse-quence that thermal stresses can appear at the circumfer-ence only partially. Therefore, no addition to the share 15 of thermal stress ensues and the dreaded layer cracks are avoided. The thickness of the matrix bonding layer itself can be reduced with the above-mentioned construction of the blades if the compound is replaced ~y filler in the core region. Saving of matrix material thus occurs 20 in twofold consideration~
Steel, for example is a suitable filler, wlth which the space between the matrix bonding compound layer and the steel connecting body is filled and subse~uently bonded by means of a sintering process.
A special advantage of this intermediate layer lies in the buffering effect relative to the steel connect-ing body which expands against the graphite mold during the heating process.
The matrix bonding compound may be applied to 30 the surface as a uniformly thick layer in a tangential direction and orthogonal to it if it is expected that the formation of uniform abrasion will occur in the appli-cation of the rotar~ drill tool or also adjuste~ according to the degree of the abrasion and erosion forces occurring at various locations ~f the t~l during drilling. In addition, a choice of various abrasion-resistant material may be made taking the expected wear ~orces into consider-a~ion.
In all the above-mentioned design forms, preformed wear-resistant supportin~ bodies may be inserted into the matrix b~nding compound or into the filler, onto which diamond layer cutting elements (e.g., sintered polycrystal-line diamond) may be s~ldered after the man~facturing pro-- 10 cess of the tool body.
Similarly, man-made or natural diamonds may be set into the surface of the matrix layer or small caliber dia-monds may be împregnated directly into the matrix bonding compound. Beyond this, combinations of the ab~ve-mentioned 15 cutting materials are possible.
The nozzles or g~tters, with passage channels to a eentral hole which are usual for removal of ~rîll cuttings and cooling the cutting, may be înserted into the matrix material or shaped out of the matrix substance and, if 2D desired, out of the filler.
In a special design form of the nozzles, the passage channels are directed out to the surface vf the tool with a constant cross-section, and, preferentially~
have a relationship of diameter to length in the region 25 between 0.5 and 0.1.
If, in the case of certain blade proportions, the surface area of the steel connecting ~ody usuable for bonding must be enlarged, ridges can be welded ~nto the connecting body in the region of the blades or studs 30 may be recessed as projections during ~achining of the steel body.
Ridges or ribs are required when the relationship of blade circumferential width to blade radial height is unity or less than unity. Wear protection of the base material between the ribs, ~*~
which becomes necessary due to the tool geometry or drill-ing conditions may be achieved b~ jacketting the base material with an anti-wear lining of suitable materials by welding, flame or plasma spraying onto the steel con-5 necting body.
Additional characteristics and advantages of the invention are shown in the claims and in the following description in connection with ~he drawing, in which con-struction examples of the sub~ect of the inventi~n are 10 illustrated. In the drawing are shown:
Fig. 1 a graphic representation of a ~irst rotary drill tool with blades which are formed as studs and which carry preformed cutting layers fastened to supports. The flushing fluid is conducted 1~ through nozzles.
Fig. 2 a second rotar~ drill tool, whose blades are formed as those in Fig. 1, but in wh;ch the flushing liquid is conducted by way of gutters.
Fig. 3 a third rotary drill tool with flat studs, whose tangential surface contains cutting particles and form a cutting layer and which are perforated by waterways according to a defined configuration.
Fig. 4, 5 show cross-sections through various construction ~designs of a rotary drill tool according to Fig. 1.
Fig. 6, 7 show cross-sections through various construction & 8 designs of a rotary drill tool according to Fig. 2.
~6~
Fig. 9,10 show cross-sections through various constr~c-tion desi~ns of a rotary drill tool according to Fig. 3~
In Fig. 1, a rotary drill tool is represented 5 which includes a steel connecting body 7 and three stud shaped blades which, at times, extend from the outer radius of the tool to the center. The blades have preformed cutter tips with polycrystalline sintered diamond which are fastened to the supports which are partially inserted 10 into the stud and the whole designated as 1.
Inside the steel connecting body 7, a central drilled hole and passage channels for the flush are pro-vided to supply the tool with flushing liquid. These flow into nozzles 5.
The blades inside the nozzles are exposed to strong abrasive forces during drilling and have an abra-sion and erosion-resistance surface made of matrix bonding : substance 3. The remainder of the steel body is unprotected or provided with an anti-wear lining 6 by welding, flame or 20 plasma spraying a suitable material onto the connecting body.
For visualization of the buildup of a stud, cross-sections through a stud according to ~he design of Fig~ 1 are represented in Fig. 4 and 5. A stud with a blade part, 25 the whole designated as 1, is arranged on a steel connecting body 7. The stud consists of an outer layer of matrix bond-ing compound 3, ~hich, as described above, is very abrasion and erosion-resistant through the addition of a wear-resis-tant material, e.g., a carbide. On the other hand, an 30 inner core 4 is composed of steel which i5 bonded by means of sintering processes with or without ~he addition of binder. - - -In addition to main use as a mount and support forthe blade members.l, the matrix bonding compound 3 or the ~.
~6~6~2~3 steel core 4 serves also to protect the nozzles 5, ~hich convey the flushing liquid. The remainder of the steel connecting body can be provided with an armored coating 6, which as already described above, can be applied by welding, 5 flame or plasma spraying a suitable material ~nto the con-necting body.
The difference between the stud illustrated in Fig. 5 and the ~ne in Fig. 4 consists o~ its greater height.
This stud has a strip 8 to enlarge the usable area for bond-10 ing to the steel connecting body 7, which, for example, waswas welded onto the steel connecting body 7 or was recessed as a projection during manufacture.
Examples of how a partially produced matrix bonding substance 3 with steel core 3 is also suitable for the pro-15 duction of other tool ~hapes are given in the second toolillustrated in Fig. 2 as well as in the appropriate cross sections of Fig. 6, 7, 8. While maintaining the blade members 1 described in connection with Fig. 1, 4 and 5 open gutters~9) are provided on the outside instead of 20 nozzles. The gutters are inser~ed or shaped into the matrix bonding substance and which flow into the passa9e channels connecting with the central hole in the interior of the tool. The outer, abrasion resistant, layer of the gutters 9 is co-drawn into the interior following the outer 25 contour, so that approximately equal thickness of abrasion resistant material is encountered on all the surface loca-tions of the stud including the inserted gutters. A strip 8 according to Fi~. 7 is provided when the height of the stud is greater, which fulfills the same purpose as ~hat 30 described in connection with the design in Fig. 5.
Fig. 8 shows a design of a stud of low height, where a recess exists-in the steel connecting body 7 to receive the matrix bonding subs~ance 3 and the steel core 12.
~;
In a third drill tool, accord~ng to Fig. 3, instead of prefabricated, precisely positionea blade members, layers made of a cutting material with, for example, natural dia-monds bonded into the matrix bonding subtance are formed as 5 the outer tangential surface of the ribs and form a cutting coating 2. This cutting coating ~ is interrupted and passed through in a kind of tire tread profile by gutters 9, into which, as described with the second rotary drill tool (Fig. 2) the channels connecting with the central hole 10 fl~w.
The design represented in cross-section in Fig. 9, 10, on the other hand, corresponds to the remain-ing design shapes which have been dealt with, with respect to the arrangement of the matrix bonding substance 3 and 15 the steel core 4.
The subject of the invention is a rotary drill tool for deep wells consisting of a threaded stud for a connection with a drill string or with a steel connect-ing body including a similar rotary drive, whose head is 5 provided with c~tting members, which extend from the base region of the head into its retracted central region, which are collected in projecting row or strip-l;ke groups over the exterior surface of the tool and are supported in a bonding substance.
In known rotary drill tools of this typ~, the cutting members of natural or synthetic diamond or poly-crystalline diamond are supported in a matrix bonding substance which is mounted on the steel connecting body.
Usually tungsten carbide alloyed with copper is used as 15 the bond in the matrix bonding substance. This material possesses a high erosion and abrasion resistance but is very expensive due to its cemented carbide content.
In spite of this, a great layer thickness is required to absorb the thermal stresses which arise in 20 the manufa~turing process to prevent crack formation, so that the amDunt of expensive and scarce matrix material required is attributable as a disadvantage of known rotary ~ drill tools.
`~ The task which is basic to the invention consists, 25 with a rotary drill tool of the above-named type, of arrang-ing the matrix bonding compound in such a way that the pro-'' ~
-` ~6~2~
portion of expensive material can be reduced w;thout reduc-ing the mechanical properties of the tool.
This task is solved in a rotary drill tool of the above-named type by the fact that the arrangement of the 5 matrix bonding substance in the region of the protruding strip or row-like groups with cutting members or cutting coatings is reduced, that the matrix bonding substance is formed as a layer, and that the space between the above-named layer and the steel connecting body is provided with 10 a filler, e.g., steel.
The web or rib-like construction of the blades which surroun~ the matrix bonding subtance has as a conse-quence that thermal stresses can appear at the circumfer-ence only partially. Therefore, no addition to the share 15 of thermal stress ensues and the dreaded layer cracks are avoided. The thickness of the matrix bonding layer itself can be reduced with the above-mentioned construction of the blades if the compound is replaced ~y filler in the core region. Saving of matrix material thus occurs 20 in twofold consideration~
Steel, for example is a suitable filler, wlth which the space between the matrix bonding compound layer and the steel connecting body is filled and subse~uently bonded by means of a sintering process.
A special advantage of this intermediate layer lies in the buffering effect relative to the steel connect-ing body which expands against the graphite mold during the heating process.
The matrix bonding compound may be applied to 30 the surface as a uniformly thick layer in a tangential direction and orthogonal to it if it is expected that the formation of uniform abrasion will occur in the appli-cation of the rotar~ drill tool or also adjuste~ according to the degree of the abrasion and erosion forces occurring at various locations ~f the t~l during drilling. In addition, a choice of various abrasion-resistant material may be made taking the expected wear ~orces into consider-a~ion.
In all the above-mentioned design forms, preformed wear-resistant supportin~ bodies may be inserted into the matrix b~nding compound or into the filler, onto which diamond layer cutting elements (e.g., sintered polycrystal-line diamond) may be s~ldered after the man~facturing pro-- 10 cess of the tool body.
Similarly, man-made or natural diamonds may be set into the surface of the matrix layer or small caliber dia-monds may be împregnated directly into the matrix bonding compound. Beyond this, combinations of the ab~ve-mentioned 15 cutting materials are possible.
The nozzles or g~tters, with passage channels to a eentral hole which are usual for removal of ~rîll cuttings and cooling the cutting, may be înserted into the matrix material or shaped out of the matrix substance and, if 2D desired, out of the filler.
In a special design form of the nozzles, the passage channels are directed out to the surface vf the tool with a constant cross-section, and, preferentially~
have a relationship of diameter to length in the region 25 between 0.5 and 0.1.
If, in the case of certain blade proportions, the surface area of the steel connecting ~ody usuable for bonding must be enlarged, ridges can be welded ~nto the connecting body in the region of the blades or studs 30 may be recessed as projections during ~achining of the steel body.
Ridges or ribs are required when the relationship of blade circumferential width to blade radial height is unity or less than unity. Wear protection of the base material between the ribs, ~*~
which becomes necessary due to the tool geometry or drill-ing conditions may be achieved b~ jacketting the base material with an anti-wear lining of suitable materials by welding, flame or plasma spraying onto the steel con-5 necting body.
Additional characteristics and advantages of the invention are shown in the claims and in the following description in connection with ~he drawing, in which con-struction examples of the sub~ect of the inventi~n are 10 illustrated. In the drawing are shown:
Fig. 1 a graphic representation of a ~irst rotary drill tool with blades which are formed as studs and which carry preformed cutting layers fastened to supports. The flushing fluid is conducted 1~ through nozzles.
Fig. 2 a second rotar~ drill tool, whose blades are formed as those in Fig. 1, but in wh;ch the flushing liquid is conducted by way of gutters.
Fig. 3 a third rotary drill tool with flat studs, whose tangential surface contains cutting particles and form a cutting layer and which are perforated by waterways according to a defined configuration.
Fig. 4, 5 show cross-sections through various construction ~designs of a rotary drill tool according to Fig. 1.
Fig. 6, 7 show cross-sections through various construction & 8 designs of a rotary drill tool according to Fig. 2.
~6~
Fig. 9,10 show cross-sections through various constr~c-tion desi~ns of a rotary drill tool according to Fig. 3~
In Fig. 1, a rotary drill tool is represented 5 which includes a steel connecting body 7 and three stud shaped blades which, at times, extend from the outer radius of the tool to the center. The blades have preformed cutter tips with polycrystalline sintered diamond which are fastened to the supports which are partially inserted 10 into the stud and the whole designated as 1.
Inside the steel connecting body 7, a central drilled hole and passage channels for the flush are pro-vided to supply the tool with flushing liquid. These flow into nozzles 5.
The blades inside the nozzles are exposed to strong abrasive forces during drilling and have an abra-sion and erosion-resistance surface made of matrix bonding : substance 3. The remainder of the steel body is unprotected or provided with an anti-wear lining 6 by welding, flame or 20 plasma spraying a suitable material onto the connecting body.
For visualization of the buildup of a stud, cross-sections through a stud according to ~he design of Fig~ 1 are represented in Fig. 4 and 5. A stud with a blade part, 25 the whole designated as 1, is arranged on a steel connecting body 7. The stud consists of an outer layer of matrix bond-ing compound 3, ~hich, as described above, is very abrasion and erosion-resistant through the addition of a wear-resis-tant material, e.g., a carbide. On the other hand, an 30 inner core 4 is composed of steel which i5 bonded by means of sintering processes with or without ~he addition of binder. - - -In addition to main use as a mount and support forthe blade members.l, the matrix bonding compound 3 or the ~.
~6~6~2~3 steel core 4 serves also to protect the nozzles 5, ~hich convey the flushing liquid. The remainder of the steel connecting body can be provided with an armored coating 6, which as already described above, can be applied by welding, 5 flame or plasma spraying a suitable material ~nto the con-necting body.
The difference between the stud illustrated in Fig. 5 and the ~ne in Fig. 4 consists o~ its greater height.
This stud has a strip 8 to enlarge the usable area for bond-10 ing to the steel connecting body 7, which, for example, waswas welded onto the steel connecting body 7 or was recessed as a projection during manufacture.
Examples of how a partially produced matrix bonding substance 3 with steel core 3 is also suitable for the pro-15 duction of other tool ~hapes are given in the second toolillustrated in Fig. 2 as well as in the appropriate cross sections of Fig. 6, 7, 8. While maintaining the blade members 1 described in connection with Fig. 1, 4 and 5 open gutters~9) are provided on the outside instead of 20 nozzles. The gutters are inser~ed or shaped into the matrix bonding substance and which flow into the passa9e channels connecting with the central hole in the interior of the tool. The outer, abrasion resistant, layer of the gutters 9 is co-drawn into the interior following the outer 25 contour, so that approximately equal thickness of abrasion resistant material is encountered on all the surface loca-tions of the stud including the inserted gutters. A strip 8 according to Fi~. 7 is provided when the height of the stud is greater, which fulfills the same purpose as ~hat 30 described in connection with the design in Fig. 5.
Fig. 8 shows a design of a stud of low height, where a recess exists-in the steel connecting body 7 to receive the matrix bonding subs~ance 3 and the steel core 12.
~;
In a third drill tool, accord~ng to Fig. 3, instead of prefabricated, precisely positionea blade members, layers made of a cutting material with, for example, natural dia-monds bonded into the matrix bonding subtance are formed as 5 the outer tangential surface of the ribs and form a cutting coating 2. This cutting coating ~ is interrupted and passed through in a kind of tire tread profile by gutters 9, into which, as described with the second rotary drill tool (Fig. 2) the channels connecting with the central hole 10 fl~w.
The design represented in cross-section in Fig. 9, 10, on the other hand, corresponds to the remain-ing design shapes which have been dealt with, with respect to the arrangement of the matrix bonding substance 3 and 15 the steel core 4.
Claims (12)
1. Rotary drill tool for deep well drilling, consisting of a steel connecting body which includes a threaded stud to connect with a drill bed or similar rotary drive, whose head is provided with cutting members and/or cutting coatings, which extend from the base region of the head to its central region, combined in row or strip-like protruding groups upon the external circumference and supported in a matrix bonding substance, characterized by the fact that the arrangement of the matrix bonding substance is confined with cutting members (1) and/or cutting coatings (2) in the region of the protruding strip or row-like groups, the matrix bonding substance (3) is formed as a layer and a space bteween the said layer and the steel connecting body (7) is provided with a sintered steel filler.
2. Rotary drill tool according to claim 1 charac-terized by the fact that the thickness of the matrix bonding substance layer is adjusted according to the degree of abra-sion and erosion forces which occur at various locations of the tool during drilling.
3. Rotary drill tool, according to claim 1, characterized by the fact that passage channels for flushing liquid connected with a central hole in the steel connecting body are provided, which flow into nozzles , where the nozzles are arranged ahead of the cutting members in the rotation direction of the tool and are protected by the matrix bonding substance.
4. Rotary drill tool according to claim 3, characterized by the fact that the nozzles are shaped and formed integrally from matrix bonding substance.
5. Rotary drill tool according to claim 3, characterized by the fact that the nozzles are formed from the passage channels and have a constant cross-section over the length.
6. Rotary drill tool according to claim 1, characterized by the fact that one or more passage channels for flushing liquid are provided with a central hole into the steel connecting body , which channels flow into gutters which are open on the outside, that the drains are imbedded in the matrix bonding substance and in the filler, and thereby the layer shape of the matrix bonding substance follows the contour of the drains .
7. Rotary drill tool according to claim 1, characterized by the fact that the cutting members are formed from cutting laminae with polycrystalline sintered diamond or impregnated cutting elements, which for their part are fastened to supports.
8. Rotary drill tool according to claim 1, characterized by the fact that the cutting coatings consist of natural or synthetic or a combination of both kinds of diamond, which are impregnated into the matrix bonding substance and/or are set into its surface.
9. Rotary drill tool according to claim 1, characterized by the fact that both cutting members from cutting laminae with polycrystalline sintered diamond or impregnated cutting elements, which for their part are fastened to supports, as well as cutting members or cutting coatings of natural or synthetic or a combination of both kinds of diamond which are impregnated into the matrix bonding substance and/or set into its surface are provided.
10. Rotary drill tool according to claim 1, characterized by the fact that strips are produced on the connecting body or are recessed during the fabrication of the connecting body to enlarge the surface area usable for bonding between the steel connecting body and the filler.
:
:
11. Rotary drill tool according to claim 1, characterized by the fact that an armored lining of abra-sion and erosion-resistant material is provided between the protruding strip or row-like groups.
12. Rotary drill tool according to claim 11, characterized by the fact that the armored lining is made of a hard coating which, for example, can be formed by welding, flame or plasma spraying.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3030010.8 | 1980-08-08 | ||
| DE3030010A DE3030010C2 (en) | 1980-08-08 | 1980-08-08 | Rotary drill bit for deep drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1161028A true CA1161028A (en) | 1984-01-24 |
Family
ID=6109153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000382747A Expired CA1161028A (en) | 1980-08-08 | 1981-07-29 | Drill bit for deep well drilling |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5761187A (en) |
| AU (1) | AU541630B2 (en) |
| BE (1) | BE889745A (en) |
| CA (1) | CA1161028A (en) |
| DE (1) | DE3030010C2 (en) |
| FR (1) | FR2488324B1 (en) |
| GB (1) | GB2081347B (en) |
| MX (1) | MX155881A (en) |
| NL (1) | NL8103467A (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO830532L (en) * | 1982-02-20 | 1983-08-22 | Nl Industries Inc | Bit. |
| US4505342A (en) * | 1982-11-22 | 1985-03-19 | Nl Industries, Inc. | Drill bit |
| US4529047A (en) * | 1983-02-24 | 1985-07-16 | Norton Christensen, Inc. | Cutting tooth and a rotating bit having a fully exposed polycrystalline diamond element |
| US4491188A (en) * | 1983-03-07 | 1985-01-01 | Norton Christensen, Inc. | Diamond cutting element in a rotating bit |
| US4499959A (en) * | 1983-03-14 | 1985-02-19 | Christensen, Inc. | Tooth configuration for an earth boring bit |
| DE3478627D1 (en) * | 1983-10-24 | 1989-07-13 | Smith International | Rock bit cutter cones having metallurgically bonded cutter inserts |
| GB2148978B (en) * | 1983-10-29 | 1987-01-07 | Nl Petroleum Prod | Improvements in or relating to rotary drill bits |
| EP0156264B1 (en) * | 1984-03-26 | 1990-09-05 | Eastman Christensen Company | Multi-component cutting element using triangular, rectangular and higher order polyhedral-shaped polycrystalline diamond disks |
| EP0156235B1 (en) * | 1984-03-26 | 1989-05-24 | Eastman Christensen Company | Multi-component cutting element using consolidated rod-like polycrystalline diamond |
| AU3946885A (en) * | 1984-03-26 | 1985-10-03 | Norton Christensen Inc. | Cutting element using polycrystalline diamond disks |
| US4593776A (en) * | 1984-03-28 | 1986-06-10 | Smith International, Inc. | Rock bits having metallurgically bonded cutter inserts |
| US4554130A (en) * | 1984-10-01 | 1985-11-19 | Cdp, Ltd. | Consolidation of a part from separate metallic components |
| US4597456A (en) * | 1984-07-23 | 1986-07-01 | Cdp, Ltd. | Conical cutters for drill bits, and processes to produce same |
| US6095265A (en) * | 1997-08-15 | 2000-08-01 | Smith International, Inc. | Impregnated drill bits with adaptive matrix |
| EP1270118A1 (en) * | 2001-06-29 | 2003-01-02 | Turbolite AG | Cutting elements |
| US20100193254A1 (en) * | 2009-01-30 | 2010-08-05 | Halliburton Energy Services, Inc. | Matrix Drill Bit with Dual Surface Compositions and Methods of Manufacture |
| JP6965095B2 (en) * | 2017-10-18 | 2021-11-10 | 旭ダイヤモンド工業株式会社 | Drilling bit |
| GB201800250D0 (en) * | 2018-01-08 | 2018-02-21 | Element Six Gmbh | Drill bit with wearshield |
| JP7213692B2 (en) * | 2019-01-09 | 2023-01-27 | 旭ダイヤモンド工業株式会社 | bit for drilling |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2371489A (en) * | 1943-08-09 | 1945-03-13 | Sam P Daniel | Drill bit |
| FR1248524A (en) * | 1959-11-05 | 1960-12-16 | Europ De Turboforage Soc | Drill bit for soil drilling |
| US3471921A (en) * | 1965-12-23 | 1969-10-14 | Shell Oil Co | Method of connecting a steel blank to a tungsten bit body |
| US3938599A (en) * | 1974-03-27 | 1976-02-17 | Hycalog, Inc. | Rotary drill bit |
| DE2719330C3 (en) * | 1977-04-30 | 1984-01-05 | Christensen, Inc., 84115 Salt Lake City, Utah | Rotary drill bit |
| DE2917664C2 (en) * | 1979-05-02 | 1982-12-09 | Christensen, Inc., 84115 Salt Lake City, Utah | Rotary drill bit for deep drilling |
-
1980
- 1980-08-08 DE DE3030010A patent/DE3030010C2/en not_active Expired
-
1981
- 1981-07-13 MX MX188271A patent/MX155881A/en unknown
- 1981-07-22 NL NL8103467A patent/NL8103467A/en not_active Application Discontinuation
- 1981-07-24 BE BE0/205494A patent/BE889745A/en not_active IP Right Cessation
- 1981-07-29 CA CA000382747A patent/CA1161028A/en not_active Expired
- 1981-07-29 AU AU73550/81A patent/AU541630B2/en not_active Ceased
- 1981-07-30 FR FR8114874A patent/FR2488324B1/en not_active Expired
- 1981-08-05 GB GB8123930A patent/GB2081347B/en not_active Expired
- 1981-08-07 JP JP56123189A patent/JPS5761187A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE3030010A1 (en) | 1982-02-25 |
| NL8103467A (en) | 1982-03-01 |
| JPS6364595B2 (en) | 1988-12-13 |
| AU7355081A (en) | 1982-02-11 |
| GB2081347B (en) | 1984-05-10 |
| BE889745A (en) | 1981-11-16 |
| DE3030010C2 (en) | 1982-09-16 |
| FR2488324A1 (en) | 1982-02-12 |
| AU541630B2 (en) | 1985-01-17 |
| FR2488324B1 (en) | 1985-11-15 |
| MX155881A (en) | 1988-02-08 |
| JPS5761187A (en) | 1982-04-13 |
| GB2081347A (en) | 1982-02-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |