CN113073941A - Welding-on combined coring bit - Google Patents
Welding-on combined coring bit Download PDFInfo
- Publication number
- CN113073941A CN113073941A CN202110388921.XA CN202110388921A CN113073941A CN 113073941 A CN113073941 A CN 113073941A CN 202110388921 A CN202110388921 A CN 202110388921A CN 113073941 A CN113073941 A CN 113073941A
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- China
- Prior art keywords
- welding
- pdc
- cutting block
- diamond
- rigid body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 80
- 238000003466 welding Methods 0.000 claims description 58
- 229910003460 diamond Inorganic materials 0.000 claims description 37
- 239000010432 diamond Substances 0.000 claims description 37
- 238000005728 strengthening Methods 0.000 claims description 20
- 238000005553 drilling Methods 0.000 description 12
- 230000003014 reinforcing effect Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 230000002787 reinforcement Effects 0.000 description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000036346 tooth eruption Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000005493 welding type Methods 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
- E21B10/46—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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a welding-on combined type coring bit, which relates to the technical field of coring bits and comprises a bit rigid body, wherein a plurality of groups of cutting block groups are fixed at the first end of the bit rigid body, each group of cutting block groups comprises a plurality of cutting blocks, the cutting blocks on the plurality of groups of cutting block groups are distributed on the first end of the bit rigid body in a staggered and spaced manner, and the second end of the bit rigid body is fixedly connected with a coring tool. The invention is provided with various types of cutting blocks on the drill rigid body, thereby being suitable for various types of stratums.
Description
Technical Field
The invention relates to the technical field of coring bits, in particular to a welding-on combined type coring bit.
Background
Core drilling is a drilling method and process aimed at obtaining a core of a rock, and is an important component of drilling engineering. Core drilling is a vital process method in activities such as oil and gas exploration drilling (including conventional petroleum and natural gas, shale gas, natural gas hydrate and the like), geothermal drilling, hot dry rock drilling, scientific drilling and the like. The core bit is an important part in the core drilling process, and the performance of the core bit directly influences the core drilling effect.
The welding method for machining the core bit is an important core bit machining method, particularly the machining of the core bit with a large diameter, and the welding technology is widely applied. Most of the traditional insert welding type core drill bits only comprise one cutting block (diamond sintered body, PDC, hard alloy or mixture of PDC and diamond sintered body), and the adaptability to the stratum is narrow. With the increase of well depth, in order to reduce the extra work load of tripping, the core bit is generally required to have broad spectrum, i.e. the core bit is required to have higher efficiency in various formations of soft-medium-hard type. The structural form of the traditional drill bit is difficult to meet the requirements.
In addition, traditional welding-on type coring bit, the face of weld uses plane and face of cylinder as the main, and the face of weld is few, and welded structure is simple, and welded fastness is relatively poor. During the core drilling process, the phenomenon that cutting teeth (or cutting blocks) fall off often occurs. The falling off of the cutting teeth (or cutting blocks) seriously affects the efficiency of coring drilling and even causes serious downhole accidents.
Therefore, there is a high demand for a new core drill in the market to solve the above problems.
Disclosure of Invention
The invention aims to provide a welding-on combined type core bit, which is used for solving the technical problems in the prior art and can be suitable for various types of strata.
In order to achieve the purpose, the invention provides the following scheme:
the invention discloses a welding-on combined type coring bit which comprises a bit rigid body, wherein a plurality of groups of cutting block groups are fixed at the first end of the bit rigid body, each group of cutting block groups comprises a plurality of cutting blocks, the cutting blocks of the plurality of groups of cutting block groups are distributed on the first end of the bit rigid body in a staggered and spaced mode, and the second end of the bit rigid body is fixedly connected with a coring tool.
Preferably, the first end of the drill rigid body is provided with a plurality of welding grooves, each welding groove is provided with a plurality of welding reinforcement holes, and the cutting block is welded in the welding groove and the welding reinforcement holes.
Preferably, the welding reinforcement hole is a cylindrical hole.
Preferably, the plurality of sets of cutting block sets include a diamond cutting block set and a PDC cutting block set, the diamond cutting block set includes a plurality of diamond cutting blocks, and the PDC cutting block set includes a plurality of PDC cutting blocks.
Preferably, one diamond cutting block comprises a diamond cutting body and two diamond welding reinforcing columns, the two diamond welding reinforcing columns are fixed on the same side of the diamond cutting body, and the two diamond welding reinforcing columns are respectively welded in the two welding reinforcing holes.
Preferably, the PDC cutting block includes a PDC supporter, two PDC welding strengthening columns and a plurality of PDC pieces, two the PDC welding strengthening columns are fixed in one side of the PDC supporter, a plurality of the PDC pieces are fixed in one side of the PDC supporter, two the PDC welding strengthening columns are welded respectively in two the welding strengthening holes.
Compared with the prior art, the invention has the following technical effects:
the invention can set various types of cutting blocks on the rigid body of the drill bit according to the requirements, thereby being capable of flexibly adapting to various types of stratums. In addition, the welding strengthening hole is formed, so that the welding area can be increased, the welding strength is improved, the cutting block is prevented from falling off, the shearing strength (or the torsion resistance) of the welding body can be increased, the circumferential impact load in the underground rock breaking process of the coring bit is resisted, and the firmness of the welding body is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of a bonded composite core bit according to an embodiment;
FIG. 2 is a side cross-sectional view of the present embodiment without a cutting block;
FIG. 3 is a top view of the present embodiment without a cutting block;
FIG. 4 is a schematic structural diagram of a PDC cutting block in this embodiment;
fig. 5 is a schematic structural diagram of a diamond cutting block in the present embodiment;
in the figure: 1 is a diamond cutting block; 1-1 is a diamond welding strengthening column; 1-2 is a diamond cutting body; 2 is a PDC cutting block; 2-1 is a PDC welding strengthening column; 2-2 is a PDC support; 2-3 are PDC slices; 3 is a drill rigid body; 3-1 is a welding strengthening hole; and 3-2 is a welding groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a welding-on combined type core bit, which is used for solving the technical problems in the prior art and can be suitable for various types of strata.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 to 5, the present embodiment provides a welding-on combined core drill, which includes a drill rigid body 3, and the drill rigid body 3 may be a conventional drill rigid body 3. A plurality of groups of cutting block groups (such as combined PDC, diamond, cemented carbide, and the like) are fixed at the first end of the drill rigid body 3, and each group of cutting block groups includes a plurality of cutting blocks. The cutting blocks of a plurality of groups of cutting block groups are distributed at intervals (arranged in a staggered way) on the first end of the drill rigid body 3, and the two sides of one cutting block are cutting blocks of different types. And the second end of the drill bit rigid body 3 is provided with a connecting thread, and the drill bit rigid body is fixedly connected with the coring tool through the thread.
When in use, the coring tool rotates, so that the drill rigid body 3 rotates.
In order to fix the drill rigid body 3 and the cutting blocks, in this embodiment, the first end of the drill rigid body 3 is provided with a plurality of welding grooves 3-2, each welding groove 3-2 is provided with two welding reinforcement holes 3-1, the cutting blocks are welded in the welding grooves 3-2 and the welding reinforcement holes 3-1, and the number of the cutting blocks is the same as that of the welding grooves 3-2. The cutting block goes deep into the welding strengthening hole 3-1, so that the welding area can be increased, the welding strength is improved, the cutting block is prevented from falling off, the shearing resistance (or torsion resistance) strength of a welding body can be increased, the circumferential impact load of the coring bit in the underground rock breaking process is resisted, and the firmness of the welding body is ensured.
Regarding the shape of the welding reinforcement hole 3-1, in the present embodiment, the welding reinforcement hole 3-1 is a generally cylindrical hole. The skilled person can also substitute other shaped holes, such as square holes, triangular holes or special-shaped holes, etc.
In this embodiment, the plurality of cutting block groups include a diamond cutting block group and a PDC cutting block group, the diamond cutting block group includes a plurality of diamond cutting blocks 1, and the PDC cutting block group includes a plurality of PDC cutting blocks 2. One skilled in the art may also replace other types of cutting blocks depending on the actual requirements of the formation.
Regarding the specific structure of the diamond cutting block 1, in the present embodiment, as shown in fig. 5, one diamond cutting block 1 includes one diamond cutting body 1-2 and two diamond welding reinforcing columns 1-1, the outer side of the diamond cutting body 1-2 is a circular arc surface, the two diamond welding reinforcing columns 1-1 are fixed on the inner side of the diamond cutting body 1-2, the two diamond reinforcing columns are respectively welded in the two welding reinforcing holes 3-1, and the diamond reinforcing columns and the welding reinforcing holes 3-1 are matched in shape and size.
As for the specific structure of the PDC cutting block 2, in this embodiment, as shown in fig. 4, the PDC cutting block 2 includes one PDC support 2-2, two PDC welding reinforcing columns 2-1, and a plurality of PDC pieces 2-3, an outer side surface of the PDC cutting block 2 is a circular arc surface, the two PDC welding reinforcing columns 2-1 are fixed on the inner side surface of the PDC support 2-2, the plurality of PDC pieces 2-3 are fixed on a side wall of the PDC support 2-2, the number of PDC pieces 2-3 is four, and a person skilled in the art can adjust the specific number of the PDC pieces 2-3 according to the length of the PDC support 2-2.
In this embodiment, the drill rigid body 3 has a cylindrical structure, a plurality of cutting blocks are uniformly distributed in the circumferential direction of the drill rigid body 3, the drill rigid body 3 has a central through hole, and the drill rigid body 3 may be a common drill rigid body 3.
In this embodiment, a plurality of stepped through holes are formed in the direction from the second end to the first end of the drill rigid body 3, the diameter of the stepped through holes is gradually reduced, and the stepped through holes on the side of the second end are provided with internal threads, so that the drill rigid body is fixedly connected with the coring tool through the internal threads on the stepped through holes.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (6)
1. A welding-on combined type coring bit is characterized in that: including the drill bit rigid body, the first end of drill bit rigid body is fixed with a plurality of cutting block group, every group the cutting block group includes a plurality of cutting block, a plurality of group the cutting block is in crisscross interval distribution on the first end of drill bit rigid body, the second end and the coring tool fixed connection of drill bit rigid body.
2. The insert-welded combination core bit according to claim 1, wherein: the first end of the drill rigid body is provided with a plurality of welding grooves, each welding groove is provided with a plurality of welding strengthening holes, and the cutting block is welded on the welding grooves and the welding strengthening holes.
3. The insert-welded combination core bit according to claim 2, wherein: the welding strengthening hole is a cylindrical hole.
4. The insert-welded combination core bit according to claim 2, wherein: the cutting block group comprises a diamond cutting block group and a PDC cutting block group, the diamond cutting block group comprises a plurality of diamond cutting blocks, and the PDC cutting block group comprises a plurality of PDC cutting blocks.
5. The insert-welded combination core bit according to claim 4, wherein: the diamond cutting block comprises a diamond cutting body and two diamond welding strengthening columns, the two diamond welding strengthening columns are fixed on the same side of the diamond cutting body, and the two diamond welding strengthening columns are respectively welded in the two welding strengthening holes.
6. The insert-welded combination core bit according to claim 4, wherein: the PDC cutting block comprises a PDC supporting body, two PDC welding strengthening columns and a plurality of PDC sheets, wherein the PDC welding strengthening columns are fixed on the same side of the PDC supporting body, the PDC sheets are fixed on one side of the PDC supporting body, and the PDC welding strengthening columns are welded in the welding strengthening holes respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110388921.XA CN113073941A (en) | 2021-04-12 | 2021-04-12 | Welding-on combined coring bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110388921.XA CN113073941A (en) | 2021-04-12 | 2021-04-12 | Welding-on combined coring bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113073941A true CN113073941A (en) | 2021-07-06 |
Family
ID=76617554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110388921.XA Pending CN113073941A (en) | 2021-04-12 | 2021-04-12 | Welding-on combined coring bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113073941A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2136323Y (en) * | 1992-06-24 | 1993-06-16 | 胜利石油管理局钻井工艺研究院 | Pdc sealed coring bit |
| CN201963235U (en) * | 2011-03-14 | 2011-09-07 | 唐山市金石超硬材料有限公司 | Diamond core bit |
| CN203769697U (en) * | 2014-04-04 | 2014-08-13 | 四川川石金刚石钻头有限公司 | Under-size gauge coring bit |
| CN105840105A (en) * | 2016-06-15 | 2016-08-10 | 吉林大学 | PDC (Polycrystalline diamond compact)-impregnated segment hybrid self-adaptive drill bit |
| CN205936406U (en) * | 2016-08-25 | 2017-02-08 | 唐山市金石超硬材料有限公司 | Novel diamond compact piece drill bit |
| CN208633776U (en) * | 2018-08-08 | 2019-03-22 | 王玉杰 | A kind of diamond bit of wave cutting end |
-
2021
- 2021-04-12 CN CN202110388921.XA patent/CN113073941A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2136323Y (en) * | 1992-06-24 | 1993-06-16 | 胜利石油管理局钻井工艺研究院 | Pdc sealed coring bit |
| CN201963235U (en) * | 2011-03-14 | 2011-09-07 | 唐山市金石超硬材料有限公司 | Diamond core bit |
| CN203769697U (en) * | 2014-04-04 | 2014-08-13 | 四川川石金刚石钻头有限公司 | Under-size gauge coring bit |
| CN105840105A (en) * | 2016-06-15 | 2016-08-10 | 吉林大学 | PDC (Polycrystalline diamond compact)-impregnated segment hybrid self-adaptive drill bit |
| CN205936406U (en) * | 2016-08-25 | 2017-02-08 | 唐山市金石超硬材料有限公司 | Novel diamond compact piece drill bit |
| CN208633776U (en) * | 2018-08-08 | 2019-03-22 | 王玉杰 | A kind of diamond bit of wave cutting end |
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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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20210706 |