CN103256008A - PDC drill bit with double shaft bottom covering - Google Patents
PDC drill bit with double shaft bottom covering Download PDFInfo
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- CN103256008A CN103256008A CN2013101898972A CN201310189897A CN103256008A CN 103256008 A CN103256008 A CN 103256008A CN 2013101898972 A CN2013101898972 A CN 2013101898972A CN 201310189897 A CN201310189897 A CN 201310189897A CN 103256008 A CN103256008 A CN 103256008A
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- cutting teeth
- drill bit
- wing
- bit body
- shaft bottom
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Abstract
The invention discloses a PDC drill bit with double shaft bottom covering. The PDC drill bit comprises a drill bit body, at least two tool blades are arranged on the drill bit body, and at least two kinds of cutting teeth with different specifications are arranged on the tool blades. The cutting teeth on the tool blade in the center of the drill bit body are the cutting teeth with large specifications. The cutting teeth on the tool blades on the nose portion and the outer shoulder portions of the drill bit body are the cutting teeth with the large specifications and small specifications, wherein the cutting teeth with the large specifications and the small specifications are arranged on the radial section line of the drill bit body in a staggered mode. Through the mixing tooth distributing mode of the PDC drill bit, the PDC drill bit is made to have double shaft bottom covering effects, different cutting teeth are arranged on the caster angles of the cutting teeth and different positions of the drill bit, a drilling effect is enhanced, the cutting structure enables the PDC drill bit to have good stability and durability and high mechanical drilling speed in a complex stratum, and the aim of improving the rock breaking efficiency of the drill bit in the complex stratum and prolonging the service life of the drill bit is achieved.
Description
Technical field
The present invention relates to a kind of PDC drill bit, be specifically related to the PDC drill bit that a kind of dual shaft bottom covers.
Background technology
The PDC drill bit is the abbreviation of polycrystalline diamond compact bit.It is oil drilling industry a kind of drilling tool commonly used.The PDC drill bit use artificial composite polycrystal-diamond as cutting element with the cutting way fractured rock, in big section soft-medium hard formation, have well broken lithology energy, the rate of penetration height, the life-span is long, overall economic efficiency is remarkable.But be subjected to the restriction of various factors in bad ground (as hard abrasive formation, broken formation, plastic formation of tasting bad etc.), the result of use of PDC drill bit is undesirable.
Restraining dark No. 2 structure Neogene System Ji Dike groups at dark 1 – of the dark district of structural belt gram band gram of storehouse, Tarim Basin car down warping region carat Soviet Union concentrates the layer of gravel of growing that three covers are arranged, the layer of gravel lithology is for containing boulder clay rock, psephitic sandstone, the gravel composition is based on quartz gravel, flint graval, grey shale gluing.Conventional 16mm cutting teeth PDC drill bit drilling efficiency is low, and application life is short, and the PDC drill bit is to the bad adaptability on stratum complicated and changeable in the prior art, and efficiency of breaking rock and the working life of drill bit are low.
Summary of the invention
The present invention has overcome the deficiencies in the prior art, the PDC drill bit that provides a kind of dual shaft bottom to cover, in the hope of PDC drill bit in the prior art to be solved to the bad adaptability on stratum complicated and changeable, problem such as the efficiency of breaking rock of drill bit and working life are low.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
The PDC drill bit that a kind of dual shaft bottom covers comprises bit body, and described bit body is provided with at least two wings, and described wing is provided with the cutting teeth of at least two kinds of different sizes; Cutting teeth is big specification cutting teeth on the described drill bit body-centered portion wing; Described bit body nose cutting teeth to the outer shoulder wing is that big specification cutting teeth and small-sized cutting teeth interlaced arrangement are on bit body radial section line.
Further technical scheme is that big specification cutting teeth is 16 millimeters cutting teeths; Described small-sized cutting teeth is 13 millimeters cutting teeths.
Further technical scheme is that big specification cutting teeth is identical with small-sized cutting teeth height of protrusion.
Further technical scheme is that wing comprises the rimmer knife wing and the short sword wing, and the described rimmer knife wing and the short sword wing are crisscross arranged on bit body.
Further technical scheme is that the rimmer knife wing and short sword wing quantity equate.
Further technical scheme is that big specification cutting teeth quantitative range is 26 to 38, and described small-sized cutting teeth quantitative range is 20 to 32.
Further technical scheme is that big specification cutting teeth is 32, and described small-sized cutting teeth is 26.
Further technical scheme is that cutting teeth back rake angle 15 is spent to 21 degree on the drill bit body-centered portion wing; Cutting teeth back rake angle 19 degree 24 degree on the described bit body nose wing; Cutting teeth back rake angle 23 degree are to 28 degree on the outer shoulder wing of described bit body.
Further technical scheme is cutting teeth back rake angle 18 degree on the drill bit body-centered portion wing; Cutting teeth back rake angle 22 degree on the described bit body nose wing; Cutting teeth back rake angle 25 degree on the outer shoulder wing of described bit body.
Compared with prior art, the invention has the beneficial effects as follows: the present invention's mixing cloth tooth mode makes drill bit have dual shaft bottom coverage effect, such cutting structure makes the PDC drill bit have good stable, durability and higher rate of penetration in the stratum of complexity, reach the efficiency of breaking rock that in bad ground, improves drill bit, prolonged the purpose of drilling life of bit; Cutting teeth back rake angle 15 degree are to 21 degree on the drill bit body-centered portion wing; Cutting teeth back rake angle 19 degree 24 degree on the bit body nose wing; Cutting teeth back rake angle 23 degree are to 28 degree on the outer shoulder wing of bit body, and the specific hypsokinesis angle design that cutting teeth is different makes drilling results better.Cutting teeth is big specification cutting teeth on the drill bit of the present invention body-centered portion wing; Bit body nose cutting teeth to the outer shoulder wing is that big specification cutting teeth and small-sized cutting teeth interlaced arrangement are on bit body radial section line; Can realize better drilling results, effectively protect cutting teeth simultaneously, also save cost.Big specification cutting teeth is identical with small-sized cutting teeth height of protrusion, can form irregular ridge like this when creep in the shaft bottom, can effectively destroy geostatic stress, is more prone to cause the fragmentation of rock.This cloth tooth mode is applicable to the stratum that inhomogeneity complicated and changeable is strong.
Description of drawings
Fig. 1 is the structural representation of one embodiment of the invention.
The specific embodiment
The present invention is further elaborated below in conjunction with accompanying drawing.
As shown in Figure 1, Fig. 1 shows the structural representation of one embodiment of the invention.The PDC drill bit that the dual shaft bottom of present embodiment covers, comprise bit body 100, bit body is provided with three rimmer knife wings and three short sword wings, three rimmer knife wings and three short sword wings are crisscross arranged on bit body 100, specific embodiment is, three rimmer knife wings are the first rimmer knife wing, 101, the second rimmer knife wings 103 and the 3rd rimmer knife wing 105; Between per two rimmer knife wings a short sword wing is set, three short sword wings are respectively the first short sword wing, 102, the second short sword wings 104 and the 3rd short sword wing 106.Be provided with the cutting teeth of at least two kinds of different sizes on each wing; Specific embodiments is to be provided with 16 millimeters cutting teeths and 13 millimeters cutting teeths on each wing; As embodiment preferred be, in the present embodiment on the drill bit body-centered portion wing cutting teeth be 16 millimeters cutting teeths; Bit body nose cutting teeth to the outer shoulder wing is that 16 millimeters cutting teeths and 13 millimeters cutting teeth interlaced arrangement are on bit body radial section line.As embodiment preferred, 16 millimeters cutting teeths are identical with the height of protrusion of 13 millimeters cutting teeths in the present embodiment.When creep in the shaft bottom, can form irregular ridge like this, can effectively destroy geostatic stress, be more prone to cause the fragmentation of rock.This cloth tooth mode is applicable to the stratum that inhomogeneity complicated and changeable is strong.16 millimeters cutting teeth quantitative ranges are 26 to 38 in the present embodiment, and 13 millimeters cutting teeth quantitative ranges are 20 to 32.Preferably 16 millimeters cutting teeths are 32, and 13 millimeters cutting teeths are 26.Specific embodiment is, in the present embodiment tooth according to distance bit body 100 distance of center circle from distance ordering, be that 16 millimeters cutting teeths are that first cutting teeth 1, the 4th cutting teeth 4, the 7th cutting teeth 7, the tenth cutting teeth 10, the 21 cutting teeth 21, the 33 cutting teeth 33,45,13 millimeters cutting teeths of the 45 cutting teeth are the 15 cutting teeth 15, the 27 cutting teeth 27, the 39 cutting teeth 39, the 51 cutting teeth 51, the 57 cutting teeth 57 on the first rimmer knife wing 101 in the distribution situation on each wing; 16 millimeters cutting teeths are that the 22 cutting teeth 22, the 34 cutting teeth 34,46,13 millimeters cutting teeths of the 46 cutting teeth are the 16 cutting teeth 16, the 28 cutting teeth 28, the 40 cutting teeth 40, the 52 cutting teeth 52, the 58 cutting teeth 58 on the first short sword wing 102; 16 millimeters cutting teeths are that the 3rd cutting teeth 3, the 6th cutting teeth 6, the 9th cutting teeth 9, the 13 cutting teeth 13, the 25 cutting teeth 25, the 37 cutting teeth 37,49,13 millimeters cutting teeths of the 49 cutting teeth are the 19 cutting teeth 19, the 31 cutting teeth 31, the 43 cutting teeth the 43, the 55 on the second rimmer knife wing 103; 16 millimeters cutting teeths are the 14 cutting teeth 14, the 26 cutting teeth 26, the 38 cutting teeth 38, the 50 cutting teeth 50 on the second short sword wing 104; 13 millimeters cutting teeths are the 20 cutting teeth 20, the 32 cutting teeth 32, the 44 cutting teeth 44, the 56 cutting teeth 56; 16 millimeters cutting teeths are that second cutting teeth 2, the 5th cutting teeth 5, the 8th cutting teeth 8, the 17 cutting teeth 17, the 29 cutting teeth 29, the 41 cutting teeth 41,53,13 millimeters cutting teeths of the 53 cutting teeth are the 11 cutting teeth 11, the 23 cutting teeth 23, the 35 cutting teeth 35, the 47 cutting teeth 47 teeth on the 3rd rimmer knife wing 105; 16 millimeters cutting teeths are that the 18 cutting teeth 18, the 30 cutting teeth 30, the 42 cutting teeth 42,54,13 millimeters cutting teeths of the 54 cutting teeth are the 12 cutting teeth 12, the 24 cutting teeth 24, the 36 cutting teeth 36, the 48 cutting teeth 48 on the 3rd short sword wing 106.As embodiment preferred, in the present embodiment on the drill bit body-centered portion wing cutting teeth back rake angle 15 degree to 21 degree; Cutting teeth back rake angle 19 degree 24 degree on the described bit body nose wing; Cutting teeth back rake angle 23 degree are to 28 degree on the outer shoulder wing of described bit body.Specific embodiment is, cutting teeth back rake angle 18 degree of first cutting teeth, 1 to the tenth cutting teeth 10 in the present embodiment, cutting teeth back rake angle 22 degree of the 11 cutting teeth the 11 to the 30 cutting teeth 30, cutting teeth back rake angle 25 degree of the 31 cutting teeth the 31 to the 58; This kind back rake angle modular design can be taken into account drilling life of bit and rate of penetration.
" embodiment " who speaks of in this manual, " another embodiment ", " embodiment ", etc., refer to concrete feature, structure or the characteristics described in conjunction with this embodiment and be included among at least one embodiment that the application's generality describes.A plurality of local appearance statement of the same race is not necessarily to refer to same embodiment in manual.Furthermore, when describing a concrete feature, structure or characteristics in conjunction with any embodiment, what advocate is to realize that in conjunction with other embodiment this feature, structure or characteristics also fall within the scope of the invention.
Although invention has been described with reference to a plurality of explanatory embodiment that invents here, but, should be appreciated that those skilled in the art can design a lot of other modification and embodiments, these are revised and embodiment will drop within the disclosed principle scope and spirit of the application.More particularly, in the scope of the open claim of the application, can carry out multiple modification and improvement to building block and/or the layout of subject combination layout.Except modification that building block and/or layout are carried out with improving, to those skilled in the art, other purposes also will be tangible.
Claims (9)
1. the PDC drill bit that dual shaft bottom covers comprises bit body, and described bit body is provided with at least two wings, and described wing is provided with the cutting teeth of at least two kinds of different sizes; It is characterized in that: cutting teeth is big specification cutting teeth on the described drill bit body-centered portion wing; Described bit body nose cutting teeth to the outer shoulder wing is that big specification cutting teeth and small-sized cutting teeth interlaced arrangement are on bit body radial section line.
2. the PDC drill bit of dual shaft bottom covering according to claim 1 is characterized in that described big specification cutting teeth is 16 millimeters cutting teeths; Described small-sized cutting teeth is 13 millimeters cutting teeths.
3. the PDC drill bit of dual shaft bottom covering according to claim 1 and 2 is characterized in that described big specification cutting teeth is identical with small-sized cutting teeth height of protrusion.
4. the PDC drill bit of dual shaft bottom covering according to claim 1 is characterized in that described wing comprises the rimmer knife wing and the short sword wing, and the described rimmer knife wing and the short sword wing are crisscross arranged on bit body.
5. the PDC drill bit of dual shaft bottom covering according to claim 4 is characterized in that the described rimmer knife wing and short sword wing quantity equate.
6. the PDC drill bit of dual shaft bottom covering according to claim 1 is characterized in that described big specification cutting teeth quantitative range is 26 to 38, and described small-sized cutting teeth quantitative range is 20 to 32.
7. the PDC drill bit of dual shaft bottom covering according to claim 6 is characterized in that described big specification cutting teeth is 32, and described small-sized cutting teeth is 26.
8. the PDC drill bit of dual shaft bottom covering according to claim 1 is characterized in that cutting teeth back rake angle 15 degree are to 21 degree on the described drill bit body-centered portion wing; Cutting teeth back rake angle 19 degree 24 degree on the described bit body nose wing; Cutting teeth back rake angle 23 degree are to 28 degree on the outer shoulder wing of described bit body.
9. the PDC drill bit of dual shaft bottom covering according to claim 1 is characterized in that cutting teeth back rake angle 18 degree on the described drill bit body-centered portion wing; Cutting teeth back rake angle 22 degree on the described bit body nose wing; Cutting teeth back rake angle 25 degree on the outer shoulder wing of described bit body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101898972A CN103256008A (en) | 2013-05-21 | 2013-05-21 | PDC drill bit with double shaft bottom covering |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101898972A CN103256008A (en) | 2013-05-21 | 2013-05-21 | PDC drill bit with double shaft bottom covering |
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| CN103256008A true CN103256008A (en) | 2013-08-21 |
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| CN2013101898972A Pending CN103256008A (en) | 2013-05-21 | 2013-05-21 | PDC drill bit with double shaft bottom covering |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798525A (en) * | 2018-06-12 | 2018-11-13 | 中国五冶集团有限公司 | The single-cone rotary drill bit of stack process |
| CN113027372A (en) * | 2020-11-12 | 2021-06-25 | 北京博德世达石油技术股份有限公司 | Novel wear-resisting high-efficient junk mill |
| CN113279699A (en) * | 2021-04-14 | 2021-08-20 | 西南石油大学 | PDC drill bit tooth arrangement design method |
Citations (9)
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|---|---|---|---|---|
| US5033559A (en) * | 1990-05-11 | 1991-07-23 | Dresser Industries, Inc. | Drill bit with faceted profile |
| US5099929A (en) * | 1990-05-04 | 1992-03-31 | Dresser Industries, Inc. | Unbalanced PDC drill bit with right hand walk tendencies, and method of drilling right hand bore holes |
| US5186268A (en) * | 1991-10-31 | 1993-02-16 | Camco Drilling Group Ltd. | Rotary drill bits |
| CN201891387U (en) * | 2010-12-15 | 2011-07-06 | 中国海洋石油总公司 | 6'' six-blade carcase PDC (Polycrystalline Diamond Compact) drill bit |
| CN201891385U (en) * | 2010-12-15 | 2011-07-06 | 中国海洋石油总公司 | 8.5'' six-blade and long-gauge carcase PDC (Polycrystalline Diamond Compact) drill bit |
| CN202249786U (en) * | 2011-09-19 | 2012-05-30 | 四川川石·克锐达金刚石钻头有限公司 | PDC (polycrystalline diamond compact) drilling bit with composite cutting teeth |
| CN202483452U (en) * | 2012-03-13 | 2012-10-10 | 深圳新速通石油工具有限公司 | PDC (Polycrystalline Diamond Compact) drill bit |
| CN202483454U (en) * | 2012-03-13 | 2012-10-10 | 深圳新速通石油工具有限公司 | Six-blade polycrystalline diamond compact (PDC) bit |
| CN203271595U (en) * | 2013-05-21 | 2013-11-06 | 四川川石·克锐达金刚石钻头有限公司 | PDC drill bit with double-well-bottom coverage |
-
2013
- 2013-05-21 CN CN2013101898972A patent/CN103256008A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5099929A (en) * | 1990-05-04 | 1992-03-31 | Dresser Industries, Inc. | Unbalanced PDC drill bit with right hand walk tendencies, and method of drilling right hand bore holes |
| US5033559A (en) * | 1990-05-11 | 1991-07-23 | Dresser Industries, Inc. | Drill bit with faceted profile |
| US5186268A (en) * | 1991-10-31 | 1993-02-16 | Camco Drilling Group Ltd. | Rotary drill bits |
| CN201891387U (en) * | 2010-12-15 | 2011-07-06 | 中国海洋石油总公司 | 6'' six-blade carcase PDC (Polycrystalline Diamond Compact) drill bit |
| CN201891385U (en) * | 2010-12-15 | 2011-07-06 | 中国海洋石油总公司 | 8.5'' six-blade and long-gauge carcase PDC (Polycrystalline Diamond Compact) drill bit |
| CN202249786U (en) * | 2011-09-19 | 2012-05-30 | 四川川石·克锐达金刚石钻头有限公司 | PDC (polycrystalline diamond compact) drilling bit with composite cutting teeth |
| CN202483452U (en) * | 2012-03-13 | 2012-10-10 | 深圳新速通石油工具有限公司 | PDC (Polycrystalline Diamond Compact) drill bit |
| CN202483454U (en) * | 2012-03-13 | 2012-10-10 | 深圳新速通石油工具有限公司 | Six-blade polycrystalline diamond compact (PDC) bit |
| CN203271595U (en) * | 2013-05-21 | 2013-11-06 | 四川川石·克锐达金刚石钻头有限公司 | PDC drill bit with double-well-bottom coverage |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798525A (en) * | 2018-06-12 | 2018-11-13 | 中国五冶集团有限公司 | The single-cone rotary drill bit of stack process |
| CN113027372A (en) * | 2020-11-12 | 2021-06-25 | 北京博德世达石油技术股份有限公司 | Novel wear-resisting high-efficient junk mill |
| CN113279699A (en) * | 2021-04-14 | 2021-08-20 | 西南石油大学 | PDC drill bit tooth arrangement design method |
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Application publication date: 20130821 |