CN106907113B - PDC drill bit suitable for exploiting shale gas in ancient kingdom on depression in Hunan province - Google Patents
PDC drill bit suitable for exploiting shale gas in ancient kingdom on depression in Hunan province Download PDFInfo
- Publication number
- CN106907113B CN106907113B CN201710313215.2A CN201710313215A CN106907113B CN 106907113 B CN106907113 B CN 106907113B CN 201710313215 A CN201710313215 A CN 201710313215A CN 106907113 B CN106907113 B CN 106907113B
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- China
- Prior art keywords
- drill bit
- cutting
- cutting blades
- gauge
- discharge groove
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- 238000005520 cutting process Methods 0.000 claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000003801 milling Methods 0.000 claims abstract description 8
- 238000007790 scraping Methods 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005461 lubrication Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000005553 drilling Methods 0.000 description 21
- 239000011159 matrix material Substances 0.000 description 7
- 229910003460 diamond Inorganic materials 0.000 description 6
- 239000010432 diamond Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005406 washing 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
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a PDC drill bit suitable for exploiting shale gas in the ancient kingdom of the depression in Hunan province, which comprises a drill bit body; the multiple cutting blades are convexly arranged at the crown part of the drill bit body, a discharge groove is formed between any two adjacent cutting blades, and a plurality of cutting scraping teeth are arranged on the same side of all the cutting blades; the gauge bodies are convexly arranged on the peripheral surface of the drill bit body, the gauge bodies are respectively connected with a plurality of cutting blades, and a plurality of cutting milling teeth are arranged on the gauge bodies in the same side direction as the cutting scraping teeth; the nozzle is arranged in the discharge groove between any two adjacent cutting blades. According to the invention, the discharge groove is formed by the plurality of the convexly arranged cutting blades, so that the discharge efficiency of the cutting materials is improved, the nozzle and the water hole provide sufficient water lubrication, the heat of the drill bit is taken away in time, and the protection effect on the drill bit is realized; the gauge body is connected with the cutting blade, and the cutting path of the cutting blade is prolonged, and the cutting milling cutter arranged on the gauge body can further scrape and mill the drill hole, so that the drill rod is prevented from being worn.
Description
Technical Field
The invention relates to the technical field of oil drilling equipment, in particular to a PDC drill bit suitable for exploiting shale gas in ancient kingdom on depression in Hunan province.
Background
The PDC drill bit is short for polycrystalline diamond compact drill bit and is a drilling tool commonly used in the geological drilling industry.
PDC bits are divided into two main categories, matrix PDC bits and steel-body PDC bits, wherein matrix diamond compact (PDC) bits are a cutting type bit in which diamond compacts are welded to a bit matrix by brazing. The matrix drill bit is formed by sintering tungsten carbide powder, and is brazed on a tungsten carbide matrix by using an artificial polycrystalline diamond compact. The steel PDC drill bit is formed by machining nickel, chromium and molybdenum alloys. Drilling holes on the drill bit body after heat treatment, and pressing (tightly fitting) the artificial polycrystalline diamond compact into the drill bit body.
The matrix type drill bit has the hardness and wear resistance of diamond and the strength impact resistance of tungsten carbide alloy, is widely used in oil field drilling, but has poor thermal stability, and particularly when the temperature of the drill bit reaches more than 350 ℃, the abrasion of the drill bit is increased, and the drilling efficiency and the service life of the drill bit are obviously reduced.
Disclosure of Invention
The invention aims to provide a PDC drill bit suitable for exploiting shale gas in the ancient world of depression in Hunan province, which is used for providing sufficient cooling for a discharge groove through a water hole arranged on a diameter-keeping body and optimizing a cutting blade structure, and solves the technical problem that the matrix PDC drill bit in the prior art is poor in thermal stability during petroleum drilling.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a PDC drill bit suitable for shale gas exploitation from ancient kingdom on depression in xiang, comprising:
the drill bit comprises a drill bit body, wherein a water cavity is formed in the drill bit body;
the multiple cutting blades are convexly arranged at the crown part of the drill bit body, a discharge groove is formed between any two adjacent cutting blades which are convexly arranged, and a plurality of cutting scraping teeth are arranged on the same side of all the cutting blades;
the gauge bodies are convexly arranged on the periphery of the drill bit body and have the same number as the cutting blades, the gauge bodies are respectively connected with a plurality of cutting blades, and a plurality of cutting milling teeth are arranged on the gauge bodies in the direction of the same side as the cutting scraping teeth;
the nozzle is arranged in the discharge groove between any two adjacent cutting blades and is communicated with the water cavity.
Further, the protruding height of the cutting blade is 0.05-0.2 times of the diameter of the drill bit, and the protruding height of the gauge body is equal to the protruding height of the cutting blade.
Further, 5-8 cutting blades are arranged, and the cutting blades are annularly and uniformly distributed on the drill bit body.
Further, a water hole is formed in the gauge body, and the water hole is communicated with the water cavity.
Further, the number of water holes arranged on each gauge body is 3.
Compared with the prior art, the invention has the following advantages:
according to the invention, the discharge groove is formed between the plurality of cutting blades convexly arranged at the crown part of the drill bit body, so that the discharge efficiency of cutting materials is improved, and the nozzle and the water hole provide sufficient water lubrication in the drilling process of the drill bit, so that the heat of the drill bit is taken away in time, and the drill bit is protected.
The gauge body is connected with the cutting blade, plays the effect of supplementary cutting blade, has prolonged the cutting path of cutting blade to the cutting milling cutter that sets up on the gauge body can further scrape the washing to the drilling that the drill bit bore out, makes the drilling pore wall smoother, provides the advantage to stretching into of drilling rod, avoids the drilling rod to receive wearing and tearing in the drilling.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a top view of the invention of fig. 1.
Fig. 3 is a bottom view of fig. 1.
Fig. 4 is a perspective view of fig. 1.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the present invention more clear and easy to understand, the present invention is further described below with reference to the accompanying drawings and the detailed description:
for a preferred embodiment of the present invention, please refer to fig. 1 and 2:
a PDC drill bit suitable for shale gas exploitation from ancient kingdom on depression in xiang, comprising:
the drill bit comprises a drill bit body 1, wherein a water cavity 2 is formed in the drill bit body 1;
the multiple cutting blades 3 are convexly arranged at the crown of the drill bit body 1, a discharge groove 4 is formed between any two adjacent cutting blades 3 which are convexly arranged, and a plurality of cutting scraping teeth 5 are arranged on the same side of all the cutting blades 3;
the gauge bodies 6 are convexly arranged on the periphery of the drill bit body and have the same number as the cutting blades 3, the plurality of gauge bodies 6 are connected with the plurality of cutting blades 3, a plurality of cutting milling teeth 7 are arranged on the gauge bodies 6 in the direction of the same side as the cutting scraping teeth 5, water holes 9 are arranged on the gauge bodies 6, the water holes 9 are communicated with the water cavity 2, the number of the water holes 9 arranged on each gauge body 6 is 3, and the circumferential structure formed by the outer wall surface of the gauge bodies 6 is a round table;
a nozzle 8, wherein the nozzle 8 is arranged in the discharge groove 4 between any two adjacent cutting blades 3, and the nozzle 8 is communicated with the water cavity 2.
In the above scheme, bit body 1 diameter is 200mm, cutting blade 3 sets up 6, cutting blade 3 annular equipartition is on bit body 1, the protruding height of cutting blade 3 is 0.15 times of bit diameter, namely 30mm, the protruding height of gauge body 6 with cutting blade 3 protrusion height is equivalent.
In the oil drilling exploitation process, the phenomenon of shrinkage of the drilled eyelet, namely shrinkage of the drilled eyelet aperture, plays a certain role in blocking the penetration of the drill rod, so that the friction between the drill rod and the aperture wall is increased, in the scheme, the drilled hole wall is further milled by the gauge body 6 and the cutting milling cutter 7 arranged on the gauge body 6, the cutting path of the cutting blade 3 is prolonged by the gauge body 6, milling reaming is ensured after the drilled eyelet is shrunk, the drilled hole wall is smoother, favorable conditions are provided for penetration of the drill rod, abrasion of the drill rod in the drilling is avoided, and accordingly smoothness of the drill rod along with the penetration of the drill bit into the drilling is ensured, meanwhile, the water hole 9 arranged on the gauge body 6 can introduce water in the water cavity 2 into the gauge body 6 and the discharge groove 4 to lubricate the space, and the earth after cutting can be timely discharged; the bulge sets up and forms the drain groove 4 between a plurality of cutting blades 3 of drill bit body 1 crown, can improve the discharge efficiency of cutting material to provide abundant water lubrication through nozzle 8 and water eye 9 in the drill bit drilling process, in time take away the heat of drill bit, play the guard action to the drill bit, improved the thermal stability of drill bit.
The PDC drill bit of the invention firstly cleans the bottom of the well before drilling, ensures no metal sundries, firstly uses small weight on bit and low rotation speed running-in when drilling is started, and then uses proper weight on bit and rotation speed drilling, the preferable weight on bit is 30-60KN, the rotation speed is 217-117r/min, and the drilling needs to be shortened in the middle every 250-300 m.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (2)
1. Be suitable for down in a Hunan, subside last ancient world shale gas exploitation PDC drill bit, its characterized in that includes:
the drill bit comprises a drill bit body, wherein a water cavity is formed in the drill bit body;
the multiple cutting blades are convexly arranged at the crown part of the drill bit body, a discharge groove is formed between any two adjacent cutting blades which are convexly arranged, and a plurality of cutting scraping teeth are arranged on the same side of all the cutting blades;
the gauge bodies are convexly arranged on the periphery of the drill bit body and have the same number as the cutting blades, the gauge bodies are respectively connected with a plurality of cutting blades, and a plurality of cutting milling teeth are arranged on the gauge bodies in the direction of the same side as the cutting scraping teeth;
the nozzle is arranged in the discharge groove between any two adjacent cutting blades and is communicated with the water cavity;
the protruding height of the cutting blade is 0.05-0.2 times of the diameter of the drill bit, and the protruding height of the gauge body is equal to the protruding height of the cutting blade;
5-8 cutting blades are arranged, and the cutting blades are annularly and uniformly distributed on the drill bit body;
the gauge body is provided with a water hole which is communicated with the water cavity.
2. The PDC drill bit for exploiting shale gas suitable for depression in the Hunan world of claim 1, wherein 3 water holes are formed in each gauge body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710313215.2A CN106907113B (en) | 2017-05-05 | 2017-05-05 | PDC drill bit suitable for exploiting shale gas in ancient kingdom on depression in Hunan province |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710313215.2A CN106907113B (en) | 2017-05-05 | 2017-05-05 | PDC drill bit suitable for exploiting shale gas in ancient kingdom on depression in Hunan province |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106907113A CN106907113A (en) | 2017-06-30 |
| CN106907113B true CN106907113B (en) | 2024-03-26 |
Family
ID=59210928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710313215.2A Active CN106907113B (en) | 2017-05-05 | 2017-05-05 | PDC drill bit suitable for exploiting shale gas in ancient kingdom on depression in Hunan province |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106907113B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6021858A (en) * | 1996-06-05 | 2000-02-08 | Smith International, Inc. | Drill bit having trapezium-shaped blades |
| CN101382045A (en) * | 2008-07-30 | 2009-03-11 | 江汉石油钻头股份有限公司 | Three-cone bit for horizontal well and hard formation well |
| CN102409980A (en) * | 2011-12-22 | 2012-04-11 | 河南神龙石油钻具有限公司 | Blade type PDC (Polycrystalline Diamond Compact) drill bit |
| CN204627420U (en) * | 2015-03-31 | 2015-09-09 | 中国石油大学(华东) | Gauge PDC drill bit is strengthened for plasticity mud shale three wing |
| CN105822229A (en) * | 2016-05-16 | 2016-08-03 | 廊坊市鼎鑫联拓工贸有限公司 | PDC bit with torsion impact function |
| CN205477380U (en) * | 2016-02-01 | 2016-08-17 | 四川川庆石油钻采科技有限公司 | PDC drill bit is hindered to low rubbing |
| CN105888559A (en) * | 2016-05-09 | 2016-08-24 | 中国石油天然气股份有限公司 | PDC drill bit suitable for mud rock |
| CN205532305U (en) * | 2016-03-29 | 2016-08-31 | 西南石油大学 | Rotatable PDC drill bit of cutting teeth |
-
2017
- 2017-05-05 CN CN201710313215.2A patent/CN106907113B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6021858A (en) * | 1996-06-05 | 2000-02-08 | Smith International, Inc. | Drill bit having trapezium-shaped blades |
| CN101382045A (en) * | 2008-07-30 | 2009-03-11 | 江汉石油钻头股份有限公司 | Three-cone bit for horizontal well and hard formation well |
| CN102409980A (en) * | 2011-12-22 | 2012-04-11 | 河南神龙石油钻具有限公司 | Blade type PDC (Polycrystalline Diamond Compact) drill bit |
| CN204627420U (en) * | 2015-03-31 | 2015-09-09 | 中国石油大学(华东) | Gauge PDC drill bit is strengthened for plasticity mud shale three wing |
| CN205477380U (en) * | 2016-02-01 | 2016-08-17 | 四川川庆石油钻采科技有限公司 | PDC drill bit is hindered to low rubbing |
| CN205532305U (en) * | 2016-03-29 | 2016-08-31 | 西南石油大学 | Rotatable PDC drill bit of cutting teeth |
| CN105888559A (en) * | 2016-05-09 | 2016-08-24 | 中国石油天然气股份有限公司 | PDC drill bit suitable for mud rock |
| CN105822229A (en) * | 2016-05-16 | 2016-08-03 | 廊坊市鼎鑫联拓工贸有限公司 | PDC bit with torsion impact function |
Non-Patent Citations (1)
| Title |
|---|
| 大尺寸井眼扶正器断裂问题分析与建议;刘先富等;《石油机械》;20170228;第45卷(第2期);第32-34页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106907113A (en) | 2017-06-30 |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 443001 Three Gorges private science and Technology Park, Hubei, Yichang Applicant after: Yichang Shenda Technology Co.,Ltd. Address before: 443001 Three Gorges private science and Technology Park, Hubei, Yichang Applicant before: YICHANG SHENDA PETROMACHINE Co.,Ltd. |
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| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |