CN112324344B - Mixed drill bit for plowing, cutting and grinding composite rock breaking - Google Patents
Mixed drill bit for plowing, cutting and grinding composite rock breaking Download PDFInfo
- Publication number
- CN112324344B CN112324344B CN202011400066.1A CN202011400066A CN112324344B CN 112324344 B CN112324344 B CN 112324344B CN 202011400066 A CN202011400066 A CN 202011400066A CN 112324344 B CN112324344 B CN 112324344B
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- Prior art keywords
- drill bit
- wing
- rock
- blades
- crushing
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Classifications
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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
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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
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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
Abstract
The invention belongs to the field of petroleum exploration and development, and relates to a petroleum exploration drill bit, in particular to a hybrid drill bit for plowing, cutting and grinding composite rock breaking, which is characterized by comprising the following components: first broken original paper, the broken original paper of second, wing, runner, impregnated diamond layer, drill bit body, drill bit joint and wing annular, the bottom of drill bit body is provided with the drill bit joint that is used for the dismouting drill bit, the top of drill bit body is provided with many wings that are used for broken rock, the wing surface is provided with the impregnated diamond layer that is used for increasing wing intensity, crisscross first broken original paper and the broken original paper of second that is provided with on the wing, be provided with between many wings and be used for drilling fluid exhaust runner, be provided with the wing annular on the wing.
Description
Technical Field
The invention belongs to the field of petroleum exploration and development, and relates to a petroleum exploration drill bit, in particular to a hybrid drill bit for plowing, cutting and grinding composite rock breaking.
Background
With the continuous deepening of oil exploration and development, shallow and easily-developed oil and gas resources are less and less, and the search for the oil and gas resources in deep strata and under complex geological conditions is gradually becoming an important work of the current exploration and development. Deep hard rock generally exhibits properties of high strength, high hardness, strong abrasiveness, severe heterogeneity, and poor drillability during drilling. The drill bits of single rock breaking modes such as PDC drill bits and diamond-impregnated drill bits generally have the problems of low drilling speed and short service life of the drill bits in the drilling process of deep hard rock strata, so that the drilling cost is high, the drilling speed of deep wells and ultra-deep wells and the overall benefit of exploration and development are directly restricted, and the conventional drilling level is difficult to accelerate the step of exploration and development of the deep wells and the ultra-deep wells.
Conventional diamond-impregnated bits are drilled by continuously grinding the formation, which is generally used for drilling high hardness, highly abrasive formations, and because the drill itself is advanced by grinding the single rock breaking means, the rate of penetration and efficiency of the machine are low during the actual drilling process.
When drilling a hard formation, the conventional PDC diamond bit mainly realizes underground drilling in a scraping motion mode, main cutting elements on the nose and the shoulder of the diamond bit are difficult to effectively bite into rock at the bottom of a well, and the mechanical drilling speed of the diamond bit becomes very slow; the roller bit crushes rock in an impact crushing mode, so that the rock is easy to generate a deeper crushing tooth pit, but the rock cannot be crushed in volume due to hard stratum, so that the cutting efficiency of the cutting tooth of the roller bit is low, and the mechanical drilling speed of the roller bit is slow. On the other hand, when the bit encounters a formation with many soft and hard interlayers, the cutting element of the PDC diamond bit is very easily damaged by impact, and in order to cope with this situation, chinese patent document CN200880016630.0 discloses a hybrid bit formed by combining a roller cone bit and a PDC diamond bit, which has strong overall performance but has the following disadvantages: due to a rock breaking mechanism of impact crushing specific to the tricone bit, impact load generated by rotation of a cone easily causes crushing of a PDC (polycrystalline diamond compact) composite sheet of a cutting element of a diamond bit part, so that the mechanical drilling speed of the bit is reduced.
Disclosure of Invention
Aiming at the defects that the mechanical drilling speed and the mechanical drilling efficiency are low in the actual drilling process in the prior art, and when the drill bit encounters some strata with more soft and hard interlayers, the cutting element of the PDC diamond drill bit is very easy to be damaged by impact.
The utility model provides a plough and cut mixed drill bit of compound broken rock of grinding which characterized in that includes: first broken original paper, the broken original paper of second, wing, runner, impregnated diamond layer, drill bit body, drill bit joint and wing annular, the bottom of drill bit body is provided with the drill bit joint that is used for the dismouting drill bit, the top of drill bit body is provided with many wings that are used for broken rock, the wing surface is provided with the impregnated diamond layer that is used for increasing wing intensity, crisscross first broken original paper and the broken original paper of second that is provided with on the wing, be provided with between many wings and be used for drilling fluid exhaust runner, be provided with the wing annular on the wing.
The drill bit body is at least provided with 6 blades for breaking rock.
The height range of the first crushing element is as follows: 1-1.3mm.
The height range of the second crushing element is as follows: 1.5-2mm.
The included angle range between the plurality of blades is 15-60 degrees.
The number that sets up first broken original paper on the wing of knife is 2-5.
The number of the second crushing elements arranged on the blade is 1-3.
The working principle is as follows:
compared with the conventional diamond-impregnated bit which only breaks rock in a grinding mode, the plough-cutting and grinding composite rock breaking bit breaks rock in a mode of firstly fracturing, then ploughing and then grinding. The surface of the blade of the plough cutting-grinding composite rock breaking drill is covered with a diamond-impregnated layer with the thickness of about 6mm, and the blade is provided with a breaking element for pre-fracturing and pre-ploughing stratum. Wherein, the exposed height of the crushing element on the surface of the blade is 1-1.3mm and 1.5-2mm, and the larger contact area is shown in figure 4, so that the service life of the drill bit with the annular groove blade is longer. Furthermore, the annular groove of the blade is coincided with an annular boss formed by rock to be cut at the bottom of the well, so that the transverse vibration of the drill bit can be reduced, the drilling stability and the well hole quality are improved, and in the aspect of the drilling process, firstly, the crushing element with higher exposed height on the blade is firstly contacted with the rock under the action of the drilling pressure, so that the rock is pressed and pre-cracked, and the rock pressure is released. Secondly, the crushing element with the lower exposure height can press the rock under the action of the bit pressure after the crushing element with the higher exposure height is pressed into the rock, and at the moment, the two crushing elements with different initial exposure heights can plough and cut the rock along with the rotation of the drill bit. And thirdly, when the rock is ploughed by the crushing element, the surfaces of the blades can be contacted with the rock, and the rock which is fractured and pre-crushed by ploughing is ground, so that rapid drilling is realized.
The invention has the beneficial effects that:
1. according to the invention, the drilling speed is increased and the working efficiency is improved in the working process of the diamond-bit-impregnated mechanical drill in the high-hardness and high-abrasiveness stratum.
2. The fracturing plough cutting device adopts the first crushing element and the second crushing element with different heights to improve the durability of the fracturing plough cutting function.
3. According to the invention, the first crushing original piece and the second crushing original piece with different heights are adopted at the same time, so that the rock crushing speed is increased, and the working efficiency of the whole drill bit is improved.
4. The invention has lower exposed height of the crushing element and increases the total number of the crushing elements so as to improve the durability of the fracturing plough cutting function.
Reference numerals
1. First broken original paper, 2, the broken original paper of second, 3, wing, 4, runners, 5, impregnated diamond layer, 6, drill bit body, 7, drill bit joint, 8, wing ring groove.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a top view of the present invention;
fig. 4-6 are schematic diagrams of the process of breaking rock by the plough cutting and grinding composite rock breaking drill bit.
The specific implementation mode is as follows:
example 1:
the utility model provides a plough and cut mixed drill bit of compound broken rock of grinding which characterized in that includes: first broken original paper 1, the broken original paper 2 of second, wing 3, runner 4, pregnant diamond layer 5, drill bit body 6, bit joint 7 and wing annular 8 of inlaying, the bottom of drill bit body 6 is provided with the bit joint 7 that is used for the dismouting drill bit, the top of drill bit body 6 is provided with many wing 3 that are used for breaking rock, 3 surfaces of wing are provided with the pregnant diamond layer 5 of inlaying that is used for increasing 3 intensity of wing, the mistake is provided with the broken original paper 1 of first and second 2 on the wing 3, be provided with between many wing 3 and be used for drilling fluid exhaust runner 4, be provided with wing annular 8 on the wing 3.
Furthermore, the annular groove of the blade is coincided with an annular boss formed by the cut rock at the bottom of the well, so that the transverse vibration of the drill bit can be reduced, and the drilling stability and the well hole quality are improved.
Example 2:
the utility model provides a plough and cut mixed drill bit of compound broken rock of grinding which characterized in that includes: first broken original paper 1, the broken original paper 2 of second, wing 3, runner 4, pregnant diamond layer 5, drill bit body 6, bit joint 7 and wing annular 8 of inlaying, the bottom of drill bit body 6 is provided with the bit joint 7 that is used for the dismouting drill bit, the top of drill bit body 6 is provided with many wing 3 that are used for breaking rock, 3 surfaces of wing are provided with the pregnant diamond layer 5 of inlaying that is used for increasing 3 intensity of wing, the mistake is provided with the broken original paper 1 of first and second 2 on the wing 3, be provided with between many wing 3 and be used for drilling fluid exhaust runner 4, be provided with wing annular 8 on the wing 3.
The drill bit body 6 is at least provided with 6 blades 3 for breaking rock.
The height range of the first crushing element 1 is as follows: 1.1mm.
The second crushing element the height range of 2 is: 2mm.
The included angle range between the plurality of blades 3 is 15 degrees.
Example 3:
the utility model provides a plough and cut mixed drill bit of compound broken rock of grinding which characterized in that includes: first broken original paper 1, the broken original paper 2 of second, wing 3, runner 4, pregnant diamond layer 5, drill bit body 6, bit joint 7 and wing annular 8 of inlaying, the bottom of drill bit body 6 is provided with the bit joint 7 that is used for the dismouting drill bit, the top of drill bit body 6 is provided with many wing 3 that are used for breaking rock, 3 surfaces of wing are provided with the pregnant diamond layer 5 of inlaying that is used for increasing 3 intensity of wing, the mistake is provided with the broken original paper 1 of first and second 2 on the wing 3, be provided with between many wing 3 and be used for drilling fluid exhaust runner 4, be provided with wing annular 8 on the wing 3.
The drill bit body 6 is at least provided with 6 blades 3 for breaking rock.
The height of the first crushing element 1 is: 1mm.
The height of the second crushing element 2 is: 2mm.
The included angle range between the plurality of blades 3 is 45 degrees.
Example 4:
the utility model provides a plough and cut mixed drill bit of compound broken rock of grinding which characterized in that includes: first broken original paper 1, the broken original paper 2 of second, wing 3, runner 4, pregnant diamond layer 5, drill bit body 6, bit joint 7 and wing annular 8 of inlaying, the bottom of drill bit body 6 is provided with the bit joint 7 that is used for the dismouting drill bit, the top of drill bit body 6 is provided with many wing 3 that are used for breaking rock, 3 surfaces of wing are provided with the pregnant diamond layer 5 of inlaying that is used for increasing 3 intensity of wing, the mistake is provided with the broken original paper 1 of first and second 2 on the wing 3, be provided with between many wing 3 and be used for drilling fluid exhaust runner 4, be provided with wing annular 8 on the wing 3.
The drill bit body 6 is at least provided with 6 blades 3 for breaking rock.
The height of the first crushing element 1 is: 1mm.
The height of the second crushing element 2 is: 1.7mm.
The included angle range between the plurality of blades 3 is 45 degrees.
The number of the first crushing elements 1 arranged on the blade 3 is 3.
The number that sets up broken original paper 2 of second on wing of a knife 3 is 1.
Example 5:
the utility model provides a plough and cut mixed drill bit that grinds compound broken rock which characterized in that includes: first broken original paper 1, the broken original paper 2 of second, wing 3, runner 4, pregnant diamond layer 5, drill bit body 6, bit joint 7 and wing annular 8 of inlaying, the bottom of drill bit body 6 is provided with the bit joint 7 that is used for the dismouting drill bit, the top of drill bit body 6 is provided with many wing 3 that are used for breaking rock, 3 surfaces of wing are provided with the pregnant diamond layer 5 of inlaying that is used for increasing 3 intensity of wing, the mistake is provided with the broken original paper 1 of first and second 2 on the wing 3, be provided with between many wing 3 and be used for drilling fluid exhaust runner 4, be provided with wing annular 8 on the wing 3.
The drill bit body 6 is at least provided with 6 blades 3 for breaking rock.
The height of the first crushing element 1 is: 1.2mm.
The height of the second crushing element 2 is: 1.5mm.
The included angle range between the plurality of blades 3 is 45 degrees.
The number that sets up first broken original paper 1 on wing 3 is 4.
The number that sets up broken original paper 2 of second on wing of a knife 3 is 2.
The higher exposed crushing elements are intended to increase the pressure between the crushing element and the rock, so that the crushing element is more favorable to pressing into the rock. The crushing elements with different exposure heights are staggered on the whole drill bit, and the blades are blades with ring grooves, so that compared with the traditional straight profile blades, the blades with the ring grooves have longer contact length with the rock.
Claims (5)
1. The utility model provides a plough and cut mixed drill bit of compound broken rock of grinding which characterized in that includes: the drill bit comprises a first crushing original (1), a second crushing original (2), blades (3), a flow channel (4), a diamond-impregnated layer (5), a drill bit body (6), a drill bit joint (7) and blade ring grooves (8), wherein the drill bit joint (7) for assembling and disassembling a drill bit is arranged at the bottom of the drill bit body (6), a plurality of blades (3) for breaking rock are arranged at the top of the drill bit body (6), the diamond-impregnated layer (5) for increasing the strength of the blades (3) is arranged on the surface of each blade (3), the first crushing original (1) and the second crushing original (2) are arranged on the blades (3) in a staggered mode, the flow channel (4) for discharging drilling fluid is arranged among the blades (3), and the blade ring grooves (8) are arranged on the blades (3); the drill bit body (6) is at least provided with 6 blades (3) for breaking rock; the included angle range among the plurality of blades (3) is 15-60 degrees; the thickness of impregnated diamond layer is 6mm.
2. The hybrid drill bit for plowing and grinding composite rock breaking according to claim 1, characterized in that: the height range of the first crushing element (1) is as follows: 1-1.3mm.
3. The hybrid drill bit for plowing and grinding composite rock breaking according to claim 1, characterized in that: the height range of the second crushing element (2) is as follows: 1.5-2mm.
4. The hybrid drill bit for plowing and grinding composite rock breaking according to claim 1, characterized in that: the number of the first crushing elements (1) arranged on the blade (3) is 2-5.
5. The hybrid drill bit for plowing and grinding composite rock breaking according to claim 1, characterized in that: the number of the second crushing elements (2) arranged on the blade (3) is 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011400066.1A CN112324344B (en) | 2020-12-04 | 2020-12-04 | Mixed drill bit for plowing, cutting and grinding composite rock breaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011400066.1A CN112324344B (en) | 2020-12-04 | 2020-12-04 | Mixed drill bit for plowing, cutting and grinding composite rock breaking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112324344A CN112324344A (en) | 2021-02-05 |
| CN112324344B true CN112324344B (en) | 2023-04-07 |
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ID=74302081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011400066.1A Active CN112324344B (en) | 2020-12-04 | 2020-12-04 | Mixed drill bit for plowing, cutting and grinding composite rock breaking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112324344B (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100147594A1 (en) * | 2006-11-08 | 2010-06-17 | Nd Downhole Technology Ltd. | Reverse nozzle drill bit |
| CN102852462B (en) * | 2012-08-24 | 2015-04-29 | 北京探矿工程研究所 | Composite inserted tooth blade type diamond comprehensive drill bit |
| CN204024480U (en) * | 2014-07-01 | 2014-12-17 | 中国石油化工集团公司 | Be applicable to the plough cut type PDC drill bit of hard formation |
| CN105952382A (en) * | 2016-06-28 | 2016-09-21 | 四川川庆石油钻采科技有限公司 | Diamond-impregnated bit with double cutting structures |
| CN206233859U (en) * | 2016-08-31 | 2017-06-09 | 四川川石·克锐达金刚石钻头有限公司 | A kind of PDC drill bit suitable for directed drilling |
| CN206280004U (en) * | 2016-11-22 | 2017-06-27 | 中国石油化工股份有限公司 | A kind of mixing PDC drill bit with multiple cutting function |
| CN106639890A (en) * | 2016-12-06 | 2017-05-10 | 中国石油天然气股份有限公司 | Composite drill bit |
| CN108868625A (en) * | 2017-05-12 | 2018-11-23 | 西南石油大学 | A kind of combined cut diamond bit |
| CN108194026B (en) * | 2018-01-13 | 2019-07-30 | 东北石油大学 | Cutting-abrasive type diamond impregnated block and PDC composite sheet mix diamond setting head |
| CN211623329U (en) * | 2019-11-27 | 2020-10-02 | 四川川庆石油钻采科技有限公司 | Hard stratum mixed tooth PDC drill bit |
-
2020
- 2020-12-04 CN CN202011400066.1A patent/CN112324344B/en active Active
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| Publication number | Publication date |
|---|---|
| CN112324344A (en) | 2021-02-05 |
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