CN112302541B - A matrix PDC coring bit that is arranged in hard and above homogeneity stratum - Google Patents
A matrix PDC coring bit that is arranged in hard and above homogeneity stratum Download PDFInfo
- Publication number
- CN112302541B CN112302541B CN202011186955.2A CN202011186955A CN112302541B CN 112302541 B CN112302541 B CN 112302541B CN 202011186955 A CN202011186955 A CN 202011186955A CN 112302541 B CN112302541 B CN 112302541B
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- China
- Prior art keywords
- pdc
- pdc composite
- composite sheet
- resistant
- impact
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- 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.)
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- 239000011159 matrix material Substances 0.000 title claims description 6
- 239000002131 composite material Substances 0.000 claims abstract description 111
- 150000001875 compounds Chemical class 0.000 claims description 29
- 230000035939 shock Effects 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000005755 formation reaction Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 229910003460 diamond Inorganic materials 0.000 claims 2
- 239000010432 diamond Substances 0.000 claims 2
- 239000011521 glass Substances 0.000 claims 2
- 238000005553 drilling Methods 0.000 abstract description 15
- 239000011435 rock Substances 0.000 abstract description 15
- 238000010008 shearing Methods 0.000 abstract description 5
- 230000002411 adverse Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002173 cutting fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- DQTMTQZSOJMZSF-UHFFFAOYSA-N 3-pentadecylcatechol Chemical compound CCCCCCCCCCCCCCCC1=CC=CC(O)=C1O DQTMTQZSOJMZSF-UHFFFAOYSA-N 0.000 description 1
- 101150110652 PDC2 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000036346 tooth eruption Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—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
-
- 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
- E21B10/02—Core 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
- E21B10/46—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
- E21B10/602—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a rotary drag type bit with blades
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
A carcass PDC coring bit for medium-hard and above homogeneous strata is characterized in that a cutting PDC composite sheet and a limiting impact-resistant PDC composite sheet are arranged at the upper end of the crown of the bit at intervals; the limiting impact-resistant PDC composite sheets are two columnar PDC composite sheets and comprise a limiting impact-resistant PDC composite sheet a and a limiting impact-resistant PDC composite sheet b; the height of the spacing impact-resistant PDC composite sheet a is lower than that of the cutting PDC composite sheet along the axial height of 2-3 mm, the height of the spacing impact-resistant PDC composite sheet b is lower than that of the spacing impact-resistant PDC composite sheet a1mm, and the spacing impact-resistant PDC composite sheet a and the spacing impact-resistant PDC composite sheet b are arranged in a staggered mode. On one hand, the limiting impact-resistant PDC composite sheet limits the depth of the cutting PDC composite sheet into a stratum, so that the drill bit is subjected to smaller rock resistance, and the occurrence of stick-slip vibration of the drill bit is reduced; on the other hand, the circumferential shearing action can be generated on the residual rock on the working surface, so that the rock is broken and loosened, the rotary drilling resistance is smaller, the adverse working conditions are reduced, the service life of the drill bit is prolonged, and the drilling speed is increased.
Description
Technical Field
The invention relates to the field of geological drilling, in particular to a carcass PDC coring bit for medium-hard and above homogeneous strata.
Background
In the field of geological drilling, the PDC coring bit is pressed into the stratum under the action of the bit pressure in the process of drilling the homogeneous stratum with medium hardness and above, and the stratum is cut under the rotating action of the drill rod to be drilled. Sometimes, in order to improve the drilling speed, the bit pressure is increased, the PDC composite sheet is pressed into the stratum to an excessively large depth, so that the bit is subjected to a large reaction force, the bit is stopped for a short time by the reaction force, the drill rod continues to rotate, the torque is accumulated, when the torque reaches a certain degree, the torque transmitted to the bit is enough to break rocks, the bit rotates at an accelerated speed, and after the energy is consumed, the bit is stopped, namely, stick-slip vibration. In addition, due to the fact that the drilling surface in contact with the drill bit is uneven, the drill bit is unstable in reaction force of the stratum, the drill bit is subjected to factors such as longitudinal vibration and the like, the drill bit can bounce axially, and therefore the PDC composite sheet collides with the stratum. During drilling, the drill bit rotates one turn, and the working surface of the drill bit and the rock stratum has some residual rocks. Stick-slip vibration, longitudinal bounce and residual rocks on the working face of the drill bit can cause great damage to other structures such as the PDC composite sheet and the supporting body, so that the brittle PDC composite sheet is abnormally abraded, and the service life of the PDC coring drill bit is shortened.
Disclosure of Invention
In view of the above-mentioned deficiencies in the prior art, the present invention provides a casing PDC core bit for medium and above homogeneous formations.
The technical scheme adopted by the invention for solving the problems is as follows:
the utility model provides a matrix PDC coring bit that is used for well hard and above homogeneous stratum, includes the drill bit body, with the drill bit crown of bit body connection, its characterized in that: the upper end of the crown part of the drill bit is provided with a cutting PDC composite sheet and a limiting impact-resistant PDC composite sheet at intervals;
the limiting impact-resistant PDC composite sheets are two columnar PDC composite sheets, and each limiting impact-resistant PDC composite sheet comprises a limiting impact-resistant PDC composite sheet a and a limiting impact-resistant PDC composite sheet b;
the arrangement height of the limit impact-resistant PDC composite sheet a is 2-3 mm lower than the axial height of the cutting PDC composite sheet, the arrangement height of the limit impact-resistant PDC composite sheet b is 1mm lower than the limit impact-resistant PDC composite sheet a, and the limit impact-resistant PDC composite sheet a and the limit impact-resistant PDC composite sheet b are arranged in a staggered mode;
an inner water tank is arranged on the inner side of the crown part of the drill bit, and an outer water tank and gauge protection sheets are arranged on the outer side of the crown part of the drill bit; the positions of the inner water tank and the outer water tank are positioned between the cutting PDC composite sheet and the limiting impact-resistant PDC composite sheet; gauge protection piece position corresponds with cutting PDC compound piece, spacing PDC compound piece position of shocking resistance.
Further, the interval is provided with compound piece bearing structure of PDC, spacing compound piece mounting hole of PDC that shocks resistance in drill bit crown upper end, and the drill bit crown outside is provided with the gauge protection piece mounting groove.
Furthermore, the cutting PDC composite sheet is welded on the PDC composite sheet supporting structure, the limiting impact-resistant PDC composite sheet is welded in the limiting impact-resistant PDC composite sheet mounting hole, and the gauge protection sheet is welded in the gauge protection sheet mounting groove.
Furthermore, two cylindrical PDC composite sheets of the limiting impact-resistant PDC composite sheet have equal sizes, and the two times of the outer diameter of the limiting impact-resistant PDC composite sheet are 2-3 mm smaller than the cutting PDC composite sheet.
Further, the number of the cutting PDC compacts is an even number, and is preferably 8, 10, or 12.
Furthermore, the back inclination angle of the cutting PDC composite sheet is 20-25 degrees, and the intersecting size of the lower side of the cutting PDC composite sheet and the crown part of the drill bit is the diameter of the cutting PDC composite sheet.
The invention has the beneficial effects that:
firstly, the depth of the cutting PDC composite sheet into the stratum is limited to 2-3 mm by the limit impact-resistant PDC composite sheet a, so that the drill bit can be kept to bear smaller rock resistance, and the stick-slip vibration of the drill bit is reduced.
Secondly, when the drill bit takes place the bounce, the compound piece a of spacing PDC that shocks resistance can slow down the degree of depth of assaulting, and simultaneously, the compound piece b of spacing PDC that shocks resistance further controls the degree of depth of assaulting.
Thirdly, spacing compound piece a of PDC that shocks resistance and spacing compound piece b of PDC that shocks resistance can produce the shearing action of circumference to remaining rock on the working face, when taking place the bounce, produce axial impact shearing action to the rock, make the rock produce and break and loose to make the rotatory resistance of drilling of cutting compound piece circumference littleer, reach and reduce bad operating mode, improve the drill bit life-span, increase the effect of drilling speed.
Drawings
Fig. 1 is a schematic view of a carcass PDC core bit structure provided by the present invention.
Fig. 2 is a schematic diagram of a PDC composite sheet supporting structure, a limiting impact-resistant PDC composite sheet mounting hole and a gauge protection sheet mounting groove on a carcass PDC coring drill bit.
Wherein: 1-bit crown; 2-cutting the PDC composite sheet; 3-PDC composite sheet support structures; 4-limiting impact-resistant PDC composite sheets; 4.1-limiting impact-resistant PDC composite sheet a; 4.2-limiting impact-resistant PDC composite sheet b; 6-limiting impact-resistant PDC composite sheet mounting holes; 7-inner water tank; 8-an external water tank; 9-a bit body; 10-thread; 11-gauge protection sheet; 12-gauge plate mounting groove.
Detailed Description
The invention will be further explained with reference to the drawings.
Referring to fig. 1, a matrix PDC core drill bit for medium-hard and above homogeneous strata, comprising a bit body 9, a bit crown 1 connected with the bit body 9, characterized in that: the interval of 1 upper end in drill bit crown is provided with cutting PDC composite sheet 2, spacing PDC composite sheet 4 that shocks resistance.
The spacing PDC composite sheet 4 that shocks resistance is two column PDC composite sheets, and two column PDC composite sheets size equals, and the twice of its external diameter should be about 2 ~ 3mm than the spacing PDC2 that shocks resistance. Thus, when drilling is ensured, the columnar PDC composite sheet is positioned in a cutting groove formed during drilling of the cutting PDC composite sheet. The limited impact-resistant PDC composite sheet 4 comprises a limited impact-resistant PDC composite sheet a4.1 and a limited impact-resistant PDC composite sheet b4.2.
The arrangement height of the limiting impact-resistant PDC composite sheet a4.1 is 2-3 mm lower than the axial height of the cutting PDC composite sheet 2; the arrangement height of the limited impact-resistant PDC composite sheet b4.2 is lower than the limited impact-resistant PDC composite sheet a4.11mm, namely the arrangement height of the limited impact-resistant PDC composite sheet b is lower than the axial height of the cutting PDC composite sheet 2 by 3-4 mm. Spacing PDC composite piece a4.1 and the spacing PDC composite piece b4.2 staggered arrangement that shocks resistance, both quantity equals.
The number of PDC compacts 2 cut is an even number, which may be 8, 10, 12. The even number of cutting PDC composite sheets ensures that the following limiting impact-resistant PDC composite sheets are also even numbers, the same quantity of high-low staggered arrangement is realized, and the balance is better. The inclination angle of the structural plane of the supporting structure exposed out of the PDC composite sheet supporting structure 3 is 20-25 degrees (the included angle with the vertical plane), the back inclination angle for cutting the PDC composite sheet 2 is 20-25 degrees, the intersecting size of the lower side of the cutting PDC composite sheet 2 and the drill bit crown 1 is the diameter of the cutting PDC composite sheet 2, the cutting PDC composite sheet can be firmly embedded in the drill bit crown, and the half exposed out of the cutting PDC composite sheet realizes the cutting task.
The crown part 1 of the drill bit is a matrix formed by hot-pressing and sintering metal powder and is combined with the drill bit body 9 in the sintering process. An inner water tank 7 is arranged on the inner side of the drill bit crown portion 1, and an outer water tank 8 and a gauge protection sheet 11 are arranged on the outer side of the drill bit crown portion 1. Interior basin 7, outer basin 8 are located between compound piece 2 of cutting PDC and the compound piece 4 of spacing PDC that shocks resistance, interior basin 7, outer basin 8 make the drill bit cross the water section sufficient to bring good cooling effect to the cutting teeth, slow down wearing and tearing. The 11 positions of gauge protection piece correspond with compound piece 2 of cutting PDC, the compound piece 4 positions of spacing PDC of shocking resistance for compound piece 4 of compound piece 2 of protection cutting PDC, spacing PDC of shocking resistance, further slow down wearing and tearing.
As shown in fig. 2, the interval of 1 upper end of drill bit crown is provided with compound piece bearing structure 3 of PDC, spacing compound piece mounting hole 6 of the PDC of shocking resistance, and 1 outside in drill bit crown is provided with gauge protection piece mounting groove 12.
Cutting PDC compound piece 2 welding is on compound piece bearing structure 3 of PDC, and the compound piece 4 welding of spacing PDC of shocking resistance is in the compound piece mounting hole 6 the inside of spacing PDC of shocking resistance, and the welding of guarantor footpath piece 11 is in the compound piece mounting groove 12 the inside of guarantor footpath piece.
The bit body 9 is threaded 10.
The PDC coring bit of the matrix provided by the invention is connected with a drill string through a thread 10 and is rotationally drilled under the action of small drilling pressure and high rotating speed. The limiting impact-resistant PDC composite sheet a4.1 limits the depth of the cutting PDC composite sheet 2 cut into the stratum to be 2-3 mm, and can keep the drill bit to bear smaller rock resistance, so that the occurrence of stick-slip vibration of the drill bit is reduced. When the drill bit takes place the bounce, the compound piece of spacing PDC a4.1 of shocking resistance can slow down the degree of depth of assaulting, simultaneously, the compound piece of spacing PDC b4.2 of shocking resistance further controls the degree of depth of assaulting. Spacing compound piece a4.1 of PDC that shocks resistance and spacing compound piece b4.2 of PDC that shocks resistance can produce the shearing action of circumference to remaining rock on the working face, when taking place the bounce, produce axial impact shearing action to the rock, make the rock produce and break and loose to make the rotatory resistance of drilling of cutting compound piece 2 circumference littleer, reach and reduce bad operating mode, improve the drill bit life-span, increase the effect of drilling speed.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.
Claims (6)
1. A matrix PDC core drill bit for medium and above homogeneous strata, comprising a bit body (9), a bit crown (1) connected to the bit body (9), characterized in that: the upper end of the drill bit crown part (1) is provided with cutting PDC composite sheets (2) and limiting impact-resistant PDC composite sheets (4) at intervals;
the limiting impact-resistant PDC composite sheets (4) are two cylindrical PDC composite sheets, the two cylindrical PDC composite sheets of the limiting impact-resistant PDC composite sheets (4) are equal in size, and the limiting impact-resistant PDC composite sheets (4) comprise a limiting impact-resistant PDC composite sheet a (4.1) and a limiting impact-resistant PDC composite sheet b (4.2);
the arrangement height of the limit impact-resistant PDC composite sheet a (4.1) is 2-3 mm lower than the axial height of the cutting PDC composite sheet (2), and the arrangement height of the limit impact-resistant PDC composite sheet b (4.2) is 1mm lower than the limit impact-resistant PDC composite sheet a (4.1); the limiting impact-resistant PDC composite sheets a (4.1) and the limiting impact-resistant PDC composite sheets b (4.2) are arranged in a staggered mode;
an inner water tank (7) is arranged on the inner side of the drill bit crown part (1), and an outer water tank (8) and a gauge protection sheet (11) are arranged on the outer side of the drill bit crown part (1); the positions of the inner water tank (7) and the outer water tank (8) are positioned between the cutting PDC composite sheet (2) and the limiting impact-resistant PDC composite sheet (4); gauge protection piece (11) position corresponds with cutting PDC compound piece (2), spacing PDC compound piece (4) position of shocking resistance.
2. The carcass PDC coring bit for medium and above homogeneous formations of claim 1, wherein: bit crown (1) upper end interval is provided with compound piece bearing structure of PDC (polycrystalline diamond compact) 3, spacing compound piece mounting hole of PDC (polycrystalline diamond compact) 6 that shocks resistance, and bit crown (1) outside is provided with guarantor footpath piece mounting groove (12).
3. The carcass PDC coring bit for medium and above homogeneous formations of claim 2, wherein: cutting PDC composite sheet (2) welding is on PDC composite sheet bearing structure (3), and spacing PDC composite sheet (4) welding of shocking resistance is in spacing PDC composite sheet mounting hole (6) the inside of shocking resistance, and gage glass (11) welding is in gage glass mounting groove (12) the inside.
4. The carcass PDC coring bit for medium and above homogeneous formations of claim 1, wherein: two times of the outer diameter of the two cylindrical PDC composite sheets of the limiting impact-resistant PDC composite sheet (4) are 2-3 mm smaller than that of the cutting PDC composite sheet (2).
5. The carcass PDC coring bit for medium and above homogeneous formations of claim 1, wherein: the number of the cutting PDC composite sheets (2) is an even number, and the number of the cutting PDC composite sheets (2) is 8 or 10 or 12.
6. The carcass PDC coring bit for medium and above homogeneous formations of claim 1, wherein: the back rake angle of cutting PDC composite sheet (2) is 20 ~ 25, and the crossing size of cutting PDC composite sheet (2) downside and drill bit crown portion (1) is the diameter of cutting PDC composite sheet (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011186955.2A CN112302541B (en) | 2020-10-29 | 2020-10-29 | A matrix PDC coring bit that is arranged in hard and above homogeneity stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011186955.2A CN112302541B (en) | 2020-10-29 | 2020-10-29 | A matrix PDC coring bit that is arranged in hard and above homogeneity stratum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112302541A CN112302541A (en) | 2021-02-02 |
| CN112302541B true CN112302541B (en) | 2023-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011186955.2A Expired - Fee Related CN112302541B (en) | 2020-10-29 | 2020-10-29 | A matrix PDC coring bit that is arranged in hard and above homogeneity stratum |
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| Country | Link |
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| CN (1) | CN112302541B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116104421B (en) * | 2023-04-04 | 2023-06-20 | 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 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2066887U (en) * | 1990-06-23 | 1990-12-05 | 地质矿产部探矿工程研究所 | Geology drill bit |
| RU47042U1 (en) * | 2005-01-19 | 2005-08-10 | Федеральное государственное унитарное Научно-исследовательское геологическое предприятие "Тульское НИГП" | CURVED DRILL BIT |
| CN204436267U (en) * | 2015-02-09 | 2015-07-01 | 长沙锐合钻石工具有限公司 | A kind of height zigzag interbedding of soft and hard rocks diamond-impregnated bit |
| CN205823167U (en) * | 2016-07-12 | 2016-12-21 | 上海昌润极锐超硬材料有限公司 | A kind of geology drilling special diamond drill bit |
| CN108104722B (en) * | 2018-01-30 | 2023-08-29 | 无锡锡钻地质装备有限公司 | Third-order drill bit and manufacturing method thereof |
| CN208252035U (en) * | 2018-05-22 | 2018-12-18 | 郑州康拜特超硬材料有限公司 | A kind of diamond compact bit |
| CN209724233U (en) * | 2018-10-25 | 2019-12-03 | 长江大学 | A kind of geology PDC core bit |
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2020
- 2020-10-29 CN CN202011186955.2A patent/CN112302541B/en not_active Expired - Fee Related
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| CN112302541A (en) | 2021-02-02 |
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