CN108194026A - Cutting-abrasive type diamond impregnated block and PDC composite sheets mix diamond setting head - Google Patents
Cutting-abrasive type diamond impregnated block and PDC composite sheets mix diamond setting head Download PDFInfo
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- CN108194026A CN108194026A CN201810038347.3A CN201810038347A CN108194026A CN 108194026 A CN108194026 A CN 108194026A CN 201810038347 A CN201810038347 A CN 201810038347A CN 108194026 A CN108194026 A CN 108194026A
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- wing
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- pdc
- cutting
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- 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
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
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- 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
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
- E21B10/55—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
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- 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
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- 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
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/602—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a rotary drag type bit with blades
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to cutting and grinding type diamond impregnated blocks and PDC composite sheets to mix diamond setting head, for wing formula drill bit, using trapezoidal wing, bizet section shape is Straight Line and Arc circular arc type bipyramid bizet section, first impregnated piece and second impregnated piece is alternately arranged on each operator wing, secondary wing, and distribution has shaft bottom all standing ability, and first impregnated piece of diamond grit is 80 mesh, a concentration of 120%, tyre body hardness 60HRC；Second impregnated piece of diamond grit be 60 mesh, a concentration of 100%, tyre body hardness 45HRC；It operates there are three the wings, the angle of the two neighboring operator wing is 100O‑140 O, first operates the wing with super roof construction, and bit central arranges 1 round wedge shape PDC tooth, and 7 cylinder PDC teeth are distributed in circle wedge shape PDC tooth rims and enclose, and the present invention solves existing PDC drill bit, and rock bit and diamond bit adapt to the problem of stratum is more single.
Description
Technical field
The present invention relates to the drill bits of oil and gas drilling well, and in particular to a kind of cutting with adaptive formation characteristics
Cut-abrasive type diamond and PDC composite sheets mix diamond setting head.
Background technology
Oil drilling is the matching degree on drill bit and stratum using drill bit as rock crushing tool, decide efficiency of breaking rock and
The service life of drill bit, a suitable drill bit not only can significantly improve drilling speed, while can also reduce the hair of down-hole accident
It is raw, achieve the purpose that high speed, low cost, safety drilling.Especially deep-well, drilled strata is more across geological epoch, formation lithology
Variation is big, and drillability longitudinal difference is big, per round trip, not only takes but also expensive.Thus, deep drilling carries drill bit
Go out higher requirement and challenge.Such as Song-liao basin north deep, formation drillability grade Distribution value is distributed in more at 4.87~10 grades
8 grades or more, but it is soft or hard staggeredly serious, and anisotropism is stronger, the bad adaptability of single drill bit, and efficiency of breaking rock is low.Existing mainstream is bored
Head type has PDC drill bit, rock bit and diamond bit.PDC drill bit soft-medium hard formation have higher rate of penetration and
Service life, but PDC composite sheets are more crisp, it is impossible to higher bit pressure and impact are born, is easily collapsed in hard, extremely hard formation and boulder bed
Folding, broken teeth and skidding.The impact cutting broken rock mode of rock bit and the hard-metal insert with preferable toughness, can be in hard place
Layer uses, but the wearability of tooth is poor, and rate of penetration is relatively low, and bit life is shorter.Traditional diamond bit passes through grinding
Mode broken rock can overcome and arrive extremely hard formation firmly, but is extremely low in soft-medium hard formation efficiency of breaking rock.Impregnated diamond simultaneously
Highly significant, such as diamond impregnated block tire are influenced on the efficiency of breaking rock and service life of diamond bit with the compatibility on stratum
Body hardness be higher than stratum need hardness, carcass is not easy to wear, diamond polishing after cannot timely exposure, easily have skidded not into
Ruler phenomenon；If tyre body hardness plates not less than the hardness needed for stratum, the easy premature wear of carcass, diamond particles because of carcass
Firmly, meeting early fallout, causes bit life very low.Therefore, exploitation one kind can overcome strong and weak abrasiveness to mix, soft and hard alternation
The high efficiency drill on stratum is very urgent and important.
Invention content
It is an object of the present invention to provide cutting-abrasive type diamond impregnated blocks and PDC composite sheets to mix diamond setting head, this
Cutting-abrasive type diamond impregnated block and PDC composite sheets mix diamond setting head for solving existing PDC drill bit, rock bit and gold
Hard rock drill bit adapts to the problem of stratum is more single.
The technical solution adopted by the present invention to solve the technical problems is：This cutting-abrasive type diamond impregnated block and
PDC composite sheets mix diamond setting head as wing formula drill bit, and using trapezoidal wing, bizet section shape is straight line-circular arc-circular arc type bipyramid
Bizet section, the diamond grit of impregnated diamond wing matrix are 46 mesh, a concentration of 80%, tyre body hardness 40HRC, first
Impregnated piece and second impregnated piece is alternately arranged on each operator wing, secondary wing, and distribution has shaft bottom all standing ability, and first is pregnant
The diamond grit of insert be 80 mesh, a concentration of 120%, tyre body hardness 60HRC；Second impregnated piece of diamond grit is 60
Mesh, a concentration of 100%, tyre body hardness 45HRC；It operates there are three the wings, drill bit bottom surface is divided into three parts, phase by three operator wings
The angle of adjacent two operators wing is 100O-140O, wherein the first operator wing has super roof construction, the length of the second operator wing is less than
The length of the first operator wing, third operator chord degree are less than the length of the second operator wing, and bit central arranges 1 round wedge shape PDC
Tooth, the first operator wing, the second operator wing are respectively arranged 2 cylinder PDC teeth, and the third operator wing is disposed with three cylinder PDC
Tooth, above-mentioned 7 cylinders PDC teeth are distributed in circle wedge shape PDC tooth rims and enclose, and the circle wedge shape PDC teeth point and cylinder PDC teeth are all provided with
It is set to back rake angle 10~40O, angle of heel 10~30O。
Cutting-abrasive type diamond impregnated block and PDC composite sheets are mixed diamond setting head and are radiated using central ports in said program
Shape forces pressure type bendway hydraulic structure, and sink is distributed on bit operation face, is divided into two kinds of high pressure sink and low pressure sink, high pressure
Sink entrance section product is bigger than low pressure sink entrance section product, and as sink extends outwardly, the sectional area of high pressure sink gradually subtracts
It is small, and low pressure sink sectional area gradually expands, and high-low pressure flow field is formed in wing both sides, for cooling down and cleaning, passes through operator
The wing, secondary wing cutting output proportioning sink area of passage.
The angle of the two neighboring operator wing is 120 in said programO。
Cutting-abrasive type diamond impregnated block and PDC composite sheets mix diamond setting head rock breaking method in said program：
When boring chance extremely hard formation, second impregnated piece first wears with impregnated diamond wing matrix, and first impregnated piece of exposure is high by one
A bit, by first impregnated piece of broken rock in a manner of grinding；When boring chance hard formation, increasing bit pressure, first impregnated piece of accelerated wear test,
First impregnated piece and second impregnated piece of working face tend to be concordant, and second impregnated piece of carcass is matched with such hard formation, diamond
Go out sword, efficiency crushing rock in time；When bore meet medium ground when, further increase bit pressure, first impregnated piece, second impregnated piece,
Impregnated diamond wing matrix is by cutting and being ground combined-breaking rock；When boring chance soft-medium hard formation, due to first impregnated piece,
The differential cutting structures of the more height of formation between second impregnated piece and impregnated diamond wing matrix, first wedging stratum, and then with
The mode high speed broken rock of cutting；In entire rock break-off process, first impregnated piece, second it is impregnated can according to formation drillability compete join
With work, the main cutting of autonomous optimization and wearing terrain and broken rock mode, and then realize the adaptive of drill bit and stratum.
The invention has the advantages that：
1st, straight line-circular arc-circular arc type bipyramid bizet section that the present invention uses ensure that the stability of drill bit；Trapezoidal wing structure
The stress concentration and early stage for avoiding drill bit wing collapse folding；The operator wing surpasses the arrangement of roof construction and immediate vicinity PDC composite sheets, by force
Change the cutting power to center and neighbouring rock, actively crushed center portion rock, avoid counter core.Three kinds of carcass strengths and Buddha's warrior attendant
The cutting tooth of stone concentration is distributed rationally, and drill bit is made to have adaptive formation characteristics.
2nd, the present invention forces pressure type bendway hydraulic structure using central ports, is effectively ensured on cooling and cleaning wing every
Diamond, and avoid abrasion after drill bit water route be cut off and cause abrasion the problem of..
3rd, the present invention can effectively crush strong and weak abrasiveness and mix, and the stratum of soft and hard alternation has superpower wear-resistant；Can have
Effect hard formation 8 grades or more broken；Less than 5 grades soft-medium hard formations can effectively be crushed.
Description of the drawings
Fig. 1 is drill bit profile morphology of the present invention and super roof construction figure；
Fig. 2 is drill bit structure figure of the present invention；
Fig. 3 is cylinder PDC tooth schematic diagrames in the present invention；
Fig. 4 is circle wedge shape PDC tooth schematic diagrames in the present invention；
Fig. 5 is first impregnated piece of schematic diagram in the present invention；
Fig. 6 is second impregnated piece of schematic diagram in the present invention；
Fig. 7 is trapezoidal wing schematic diagram in the present invention.
In figure：1- cylinder PDC teeth；2- justifies wedge shape PDC teeth；First impregnated piece of 3-；Second impregnated piece of 4-；5- low pressure water
Slot；6- high pressure sinks；7- central ports；The trapezoidal wings of 8-；The operator wings of 9a- first；The operator wings of 9b- second；9c- thirds are operated
The wing；The impregnated diamond wing matrixes of 10-；11- surpasses roof construction.
Specific embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings：
With reference to shown in Fig. 1, Fig. 2, Fig. 7, it is a kind of that this cutting-abrasive type diamond impregnated block and PDC composite sheets, which mix diamond setting head,
Wing formula drill bit to ensure the stability and service life of drill bit wing, avoids early stage stress concentration from collapsing folding, using trapezoidal wing
8, bizet section shape is straight line-circular arc-circular arc type bipyramid bizet section, using 4 kinds of cutting tooths, respectively two kinds different carcasses
The impregnated diamond segment of hardness and diamond concentration（First impregnated piece 3, second impregnated piece 4, first impregnated piece is shown in Fig. 5, second pregnant
Insert is shown in Fig. 6）, cylindrical PDC teeth 1 and circle wedge shape PDC teeth 2.The diamond grit of impregnated diamond wing matrix 10 is 46 mesh,
A concentration of 80%, tyre body hardness 40HRC, first impregnated piece 3 and second impregnated piece 4 replaces cloth on each operator wing, secondary wing
It puts, distribution has a shaft bottom all standing ability, and first impregnated piece 3 of diamond grit is 80 mesh, and a concentration of 120%, tyre body hardness is
60HRC；Second impregnated piece 4 of diamond grit be 60 mesh, a concentration of 100%, tyre body hardness 45HRC, it then follows " cutting tooth exists
It is non-interference during installation ", the principle of " interior thin outer close " " shaft bottom all standing " and " being conducive to waterpower cleaning and cooling ", three kinds of Buddha's warrior attendants
Stone impregnated material can compete according to formation drillability and participate in work, preferential to select broken rock and wearing part, realize adaptive characteristic.
It operates there are three the wings, drill bit bottom surface is divided into three parts by three operator wings, and the angle of the two neighboring operator wing is
100O-140 O, wherein the first operator wing 9a has super roof construction 11, the length of the second operator wing 9b is less than the first operator wing 9a's
Length, third operator wing 9c length are less than the length of the second operator wing 9b, and bit central is arranged 1 round wedge shape PDC tooth 2, reduced
Stress concentration, the attacking ability to center core column of reinforcement, this circle wedge shape PDC tooth 2 is simultaneously positioned at the first operator wing 9a；The
One operator wing 9a, the second operator wing 9b are respectively arranged 2 cylinder PDC teeth 1, and third operator wing 9c is disposed with three cylinders
PDC teeth 1, above-mentioned 7 cylinder PDC teeth 1 are distributed in around circle wedge shape PDC teeth 2, the circle wedge shape PDC teeth 2 and cylinder PDC
Tooth 1 is disposed as back rake angle 10~40O, angle of heel 10~30O, the cutting power to center and neighbouring rock is strengthened, it is actively broken
Detritus stem.Circle wedge shape PDC teeth are shown in Fig. 4, and cylindrical PDC teeth are shown in Fig. 3.
The present invention radiates shape using central ports 7 and forces pressure type bendway hydraulic structure, and sink is distributed on bit operation face,
It is divided into 5 two kinds of high pressure sink 6 and low pressure sink.6 entrance section product of high pressure sink is bigger than low pressure sink 5；But as sink is outside
Extension, the sectional area of high pressure sink 6 is gradually reduced, and 5 sectional area of low pressure sink gradually expands, and height is formed in wing both sides
Flow field is pressed, cools down and clean every diamond particles and cutting tooth, the flow-passing surface of sink is matched according to the cutting output of major-minor wing
Product.
Two kinds of diamond impregnated blocks in the present invention（First impregnated piece 3, second impregnated piece 4）With the bortz of matrix in itself
Degree, concentration and carcass strength are different, should be designed according to the drillability range on stratum.This programme is for Song-liao basin
Deeper formation rock-drillability index value is distributed in 4.87~10 grades, is distributed in 8 grades or more, soft or hard staggeredly more serious, anisotropism pole more
What the characteristics of strong, was designed.First impregnated piece 3 of diamond grit be 80 mesh, a concentration of 120%, tyre body hardness 60HRC,
It is mainly used for overcoming firm hard formation；Second impregnated piece 4 of diamond grit is 60 mesh, a concentration of 100%, tyre body hardness is
45HRC mainly overcomes hard formation；Impregnated 10 diamond grit of diamond wing matrix be 46 mesh, a concentration of 80%, tyre body hardness
For 40HRC, it is mainly used for medium ground, mixes broken rock by the way of cutting and grinding at this time.For soft-medium hard formation, profit
It is broken with diamond impregnated block cutting.The adaptive formation characteristics of drill bit is realized by cutting structure and drilling parameter cooperation.
When boring chance extremely hard formation, second impregnated piece 4 and drill bit wing matrix（Impregnated diamond wing matrix 10）Meeting Fast Wearing, the
One impregnated piece of 3 exposure is some higher, relies primarily on first impregnated piece 3 broken rock in a manner of grinding.Hard-extremely hard formation is met when boring
When, the abrasiveness of rock reduces, and first impregnated piece of 3 carcass is not easy to be worn, and new diamond is not easy out sword, easily cause skidding and
Drilling speed reduces, and should increase bit pressure at this time, first impregnated piece of 3 accelerated wear test, and first impregnated piece 3 and second impregnated piece of 4 working face become
In concordant, second impregnated piece 4 of carcass is more matched with such stratum, and diamond can go out sword, efficient rock-breaking in time.In brill is met
Firmly-hard formation when, should further increase bit pressure, first impregnated piece 3 and second impregnated piece of 4 exposure it is higher, with what is cut and be ground
Mode mixes broken rock, during if there is skidding or cut motionless, first impregnated piece 3 and second impregnated piece of 4 Fast Wearing, and and base
Body running face is concordant, and the carcass of matrix is matched with such stratum, and diamond can go out sword, efficient rock-breaking in time.Soft arrive is met when boring
During medium ground, more height grades are formed between impregnated diamond wing matrix 10 due to first impregnated piece 3, second impregnated piece 4
The cutting structure of difference, being capable of effectively wedging stratum, and then the high speed broken rock in a manner of cutting.In entire rock break-off process, no
Impregnated piece with tyre body hardness and diamond concentration can compete participation work according to formation drillability, as long as tyre body hardness and Buddha's warrior attendant
Highly concentrated impregnated piece of stone is higher, this impregnated piece ratio bit pressure born will increase, and the rate of wear is accelerated, the work of drill bit
Face tends to be concordant, and impregnated piece of low competition of tyre body hardness participates in broken rock.Drill bit can optimize main cutting according to the drillability on stratum
And wearing part, and then realize the adaptivity on drill bit and stratum.
Claims (4)
1. a kind of cutting-abrasive type diamond impregnated block and PDC composite sheets mix diamond setting head, it is characterised in that：This cutting-grinding
Type diamond impregnated block and PDC composite sheets mix diamond setting head as wing formula drill bit, using trapezoidal wing（8）, bizet section shape is
Straight line-circular arc-circular arc type bipyramid bizet section, the diamond grit of impregnated diamond wing matrix are 46 mesh, a concentration of 80%,
Tyre body hardness is 40HRC, first impregnated piece（3）With second impregnated piece（4）It is alternately arranged on each operator wing, secondary wing, point
Cloth has a shaft bottom all standing ability, first impregnated piece（3）Diamond grit for 80 mesh, a concentration of 120%, tyre body hardness is
60HRC；Second impregnated piece（4）Diamond grit for 60 mesh, a concentration of 100%, tyre body hardness 45HRC；The operator wing has three
A, drill bit bottom surface is divided into three parts by three operator wings, and the angle of the two neighboring operator wing is 100O-140 O, wherein the first master
Wing（9a）With super roof construction（11）, the second operator wing（9b）Length be less than first operator the wing（9a）Length, third master
Wing（9c）Length is less than the second operator wing（9b）Length, bit central arrange 1 round wedge shape PDC tooth（2）, the first operator wing
（9a）, second operator the wing（9b）It is respectively arranged 2 cylinder PDC teeth（1）, the third operator wing（9c）It is disposed with three cylinders
PDC teeth（1）, above-mentioned 7 cylinders PDC teeth（1）It is distributed in circle wedge shape PDC teeth（2）Around, the circle wedge shape PDC teeth（2）And circle
Cylindricality PDC teeth（1）It is disposed as back rake angle 10~40O, angle of heel 10~30O。
2. cutting according to claim 1-abrasive type diamond impregnated block and PDC composite sheets mix diamond setting head, feature exists
In：The cutting-abrasive type diamond impregnated block and PDC composite sheets mix diamond setting head using central ports（7）Radiation shape forces pressure
Formula bendway hydraulic structure, sink are distributed on bit operation face, are divided into high pressure sink（6）With low pressure sink（5）Two kinds, high pressure
Sink（6）Entrance section product is than low pressure sink（5）Entrance section product is big, as sink extends outwardly, high pressure sink（6）Section
Product is gradually reduced, and low pressure sink（5）Sectional area gradually expands, and high-low pressure flow field is formed in wing both sides, for cooling and clearly
It washes, the area of passage of sink is matched by the cutting output of the wing of operating, secondary wing.
3. cutting according to claim 2-abrasive type diamond impregnated block and PDC composite sheets mix diamond setting head, feature exists
In：The angle of the two neighboring operator wing is 120O。
4. cutting according to claim 3-abrasive type diamond impregnated block and PDC composite sheets mix diamond setting head, feature exists
In：The cutting-abrasive type diamond impregnated block and PDC composite sheets mix diamond setting head rock breaking method：
When boring chance extremely hard formation, second impregnated piece（4）With impregnated diamond wing matrix（10）It first wears, first impregnated piece
（3）Exposure is higher, by first impregnated piece（3）The broken rock in a manner of grinding；When boring chance hard formation, increasing bit pressure, first
Impregnated piece（3）Accelerated wear test, first impregnated piece（3）With second impregnated piece（4）Working face tends to be concordant, second impregnated piece（4）'s
Carcass is matched with such hard formation, and diamond goes out sword, efficiency crushing rock in time；When boring chance medium ground, further increase
Bit pressure, first impregnated piece（3）, second impregnated piece（4）, impregnated diamond wing matrix（10）It is broken by cutting and being ground joint
Rock；When boring chance soft-medium hard formation, due to first impregnated piece（3）, second impregnated piece（4）With impregnated diamond wing matrix
（10）Between form the differential cutting structures of more height, first wedging stratum, and then the high speed broken rock in a manner of cutting；Entirely breaking
During rock, first impregnated piece（3）, second impregnated piece（4）It can be competed according to formation drillability and participate in work, autonomous optimization is main
Cutting and wearing terrain and broken rock mode, and then realize the adaptive of drill bit and stratum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810038347.3A CN108194026B (en) | 2018-01-13 | 2018-01-13 | Cutting-abrasive type diamond impregnated block and PDC composite sheet mix diamond setting head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810038347.3A CN108194026B (en) | 2018-01-13 | 2018-01-13 | Cutting-abrasive type diamond impregnated block and PDC composite sheet mix diamond setting head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108194026A true CN108194026A (en) | 2018-06-22 |
| CN108194026B CN108194026B (en) | 2019-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810038347.3A Active CN108194026B (en) | 2018-01-13 | 2018-01-13 | Cutting-abrasive type diamond impregnated block and PDC composite sheet mix diamond setting head |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324344A (en) * | 2020-12-04 | 2021-02-05 | 中国石油天然气集团有限公司 | Hybrid drill bit for plowing, cutting and grinding composite rock breaking |
| CN116104421A (en) * | 2023-04-04 | 2023-05-12 | 成都迪普金刚石钻头有限责任公司 | PDC mixed-inlaid drill bit suitable for coring of hard broken stratum |
| CN116517475A (en) * | 2023-06-30 | 2023-08-01 | 西南石油大学 | Novel wear-resistant and anti-collision beak-shaped tooth multi-blade PDC drill bit |
| CN116591693A (en) * | 2023-07-14 | 2023-08-15 | 中铁九局集团第七工程有限公司 | Tunnel pipe shed construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324344A (en) * | 2020-12-04 | 2021-02-05 | 中国石油天然气集团有限公司 | Hybrid drill bit for plowing, cutting and grinding composite rock breaking |
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| CN116517475A (en) * | 2023-06-30 | 2023-08-01 | 西南石油大学 | Novel wear-resistant and anti-collision beak-shaped tooth multi-blade PDC drill bit |
| CN116517475B (en) * | 2023-06-30 | 2023-10-03 | 西南石油大学 | Novel wear-resistant and anti-collision beak-shaped tooth multi-blade PDC drill bit |
| CN116591693A (en) * | 2023-07-14 | 2023-08-15 | 中铁九局集团第七工程有限公司 | Tunnel pipe shed construction method |
| CN116591693B (en) * | 2023-07-14 | 2023-10-03 | 中铁九局集团第七工程有限公司 | Tunnel pipe shed construction method |
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| CN108194026B (en) | 2019-07-30 |
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Effective date of registration: 20210301 Address after: No.1166, Puhe Road, industrial East District, Xindu District, Chengdu, Sichuan 610500 Patentee after: CHENGDU DEEP DIAMOND BIT Co.,Ltd. Address before: 163319 development road 199, Daqing high tech Development Zone, Heilongjiang Patentee before: NORTHEAST PETROLEUM University |
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