CN105545212B - drilling tool - Google Patents
drilling tool Download PDFInfo
- Publication number
- CN105545212B CN105545212B CN201511000346.2A CN201511000346A CN105545212B CN 105545212 B CN105545212 B CN 105545212B CN 201511000346 A CN201511000346 A CN 201511000346A CN 105545212 B CN105545212 B CN 105545212B
- Authority
- CN
- China
- Prior art keywords
- cutting tooth
- drilling tool
- connecting shaft
- cutting
- drill bit
- 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.)
- Active
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 56
- 238000005520 cutting process Methods 0.000 claims abstract description 131
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 11
- 210000000515 tooth Anatomy 0.000 description 91
- 239000004927 clay Substances 0.000 description 10
- 229910003460 diamond Inorganic materials 0.000 description 4
- 239000010432 diamond Substances 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000003466 welding 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
- E21B10/42—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
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 discloses a kind of drilling tools, comprising: drilling tool ontology；PDC drill bit on drilling tool ontology is set；PDC drill bit includes the connecting shaft with axis；Multiple wings in the connecting shaft are set；The wing is provided with the first cutting tooth in the part for stretching out the connecting shaft, and towards connecting shaft, the center line of the first cutting tooth and the axis of connecting shaft are parallel in the cutting face of the first cutting tooth.Under the premise of not influencing drilling tool drilling well effect, the lower end surface of PDC drill bit is provided with the first cutting tooth, avoids PDC drill bit lower end surface of drill bit when carrying out reaming and is directly contacted with the borehole wall.Meanwhile first cutting tooth the reaming efficiency of drilling tool can be improved, reduce the reaming time, improve reaming effect.
Description
Technical field
The present invention relates to oil-drilling field more particularly to a kind of drilling tools.
Background technique
Drilling tool is mainly used for oil-drilling field, and PDC drill bit can be installed on drilling tool to improve drilling tool
Working efficiency when drilling well.PDC drill bit is to be equipped with PDC in the cutting tooth of normal drill bit.PDC(Polycrystalline
Diamond compact) it is a kind of to cut man-made polycrystalline diamond with what tungsten carbide pedestal welded together at high temperature under high pressure
Cut element.Since PDC drill bit last century the eighties come out, because having the spies such as average rate of penetration is high, drilling depth is more, the service life is long
Point has been increasingly becoming a kind of efficient rock-breaking tool of petroleum, gas industry wide popularization and application；As people are to a new generation
PDC drill bit understanding deepens continuously, its production technology is continuously improved, and usage amount also increases year by year.
Drilling tool in drilling well, in order to prevent wellbore sand setting, undergauge, etc. cause the difficulty that makes a trip, need using drill bit
Come the rounding for modifying wellbore to guarantee wellbore, the operation of this finishing wellbore is known as reaming in field of oil drilling.Reaming operation
Drill bit identical with original hole diameter must be used, makees upper and lower and rotary motion in well.Since normal drill bit wing is followed by inclined-plane,
And there are the presence of hole shrinkage；Drill bit will cause the wing back side in reaming and directly be attached to the upper borehole wall, to influence reaming effect
Fruit.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of drilling tool, the PDC that is arranged on drilling tool
When drill bit carries out reaming, the bottom surface of PDC drill bit is provided with cutting tooth, and the efficiency of reaming can be improved, and reduces the reaming time, mentions
High reaming effect.
To achieve the goals above, the embodiment provides a kind of drilling tools, comprising:
Drilling tool ontology；
PDC drill bit on drilling tool ontology is set；
The PDC drill bit includes:
Connecting shaft with axis；
Multiple wings in the connecting shaft are set；
The wing is provided with the first cutting tooth, the cutting face of first cutting tooth in the part for stretching out the connecting shaft
Towards the connecting shaft, the center line of first cutting tooth is parallel with the axis of the connecting shaft；
The PDC drill bit includes the third cutting tooth being arranged on the wing, and the third cutting tooth is located at the knife
The side of the wing；
The size of first cutting tooth meets relational expression:
Wherein:For the shale content on stratum, t is that the interval time K of reaming twice is and drill body diameter, wing number
Relevant empirical is measured, N is the first cutting tooth number, and D is the first cutting tooth top diameter (mm), and d is the first cutting tooth bottom
Portion's diameter (mm), h are cutting tooth height (mm), and e is natural constant.
Further, the PDC drill bit includes the second cutting tooth being arranged on the wing, second cutting tooth
Cutting face is backwards to the connecting shaft.
Further, first cutting tooth backwards to it is described connection shaft portion diameter be greater than first cutting tooth towards
The diameter of the connection shaft portion.
Further, first cutting tooth is PDC cutting tooth.
Further, second cutting tooth is PDC cutting tooth.
Further, the third cutting tooth is PDC cutting tooth.
Further, the PDC cutting tooth includes pedestal and composite sheet, and the composite sheet is arranged on the pedestal.
In conclusion being provided with second in the lower end surface of PDC drill bit under the premise of not influencing drilling tool drilling well effect
Cutting tooth avoids PDC drill bit lower end surface of drill bit when carrying out reaming and directly contacts with the borehole wall.Meanwhile second cutting tooth can
To improve the reaming efficiency of drilling tool, the reaming time is reduced, improves reaming effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the drilling tool that the embodiment of the present invention provides.
The figures above explanation: 1, connecting shaft；11, interface；2, wing；21, the first protrusion；22, the second protrusion；3, it first cuts
Cut tooth；31, top；32, bottom；4, the second cutting tooth；5, third cutting tooth；6, drilling tool ontology；7, PDC drill bit.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be understood by the person skilled in the art, apparent explicitly be defined to be made to protection scope of the present invention.
As shown in Figure 1, a kind of drilling tool, comprising: drilling tool ontology 6；PDC on drilling tool ontology 6 is set
Drill bit 7；PDC drill bit includes: the connecting shaft 1 with axis, and connecting shaft 1 has opposite upper and lower end face.It is arranged in connecting shaft 1
Multiple wings 2.Wing 2 is provided with the first cutting tooth 3 in the part for stretching out the connecting shaft 1, and first cutting tooth 3 is cut
For bevel towards the connecting shaft 1, the angle of the axis formation of the center line of first cutting tooth 3 and the connecting shaft 1 is 0 °.
Drilling tool ontology 6 may include the connector with the cooperation of other devices, also may include driving connecting shaft rotation
Component, can also be including flushing tool etc..
Preferably, the angle that the center line of the first cutting tooth 3 and the axis of connecting shaft 1 are formed is 0 °, that is, first cuts
The axis direction for cutting tooth 3 and the axis direction of connecting shaft 1 can be arranged in parallel.In order to improve first cutting tooth 3 in reaming
Working efficiency and service life, the direction of the first cutting tooth 3 is identical with the direction of reaming, can guarantee the first cutting tooth 3 in this way
Will not be by the shearing force of vertical first cutting tooth, 3 axis in reaming, and then ensure that the working life of the first cutting tooth 3, and
Third cut tooth 3 to cut area larger, working efficiency can be improved.
The lower end surface of connecting shaft 1 is provided with the interface 11 being connected with drilling rod, and interface 11 can be by matching with drill rod thread
It closes so that drilling rod drives connecting shaft 1 to be rotated, and the diameter of connecting shaft 1 is greater than the diameter of drilling rod.The type of interface 11 can be with
It is selected according to the specification of drilling rod in actual use, the present embodiment not butt joint mouth is limited.The upper surface of connecting shaft 1
And side is provided with multiple wings 2, wing 2 can be integrally formed with connecting shaft 1 and be made, the side that can also be bolted
Formula is fixed in connecting shaft 1, and the mode that wing 2 is arranged in connecting shaft 1 does not limit specifically, and wing 2 is in the process used
In can be fixed on all be to meet requirement of the invention in connecting shaft 1.
Arrangement mode of the wing 2 in connecting shaft 1 can be symmetry arrangement；Wing 2 also can be with 1 upper surface center of connecting shaft
The outside diffusion profile in position.Wing 2 can be divided into the operator wing and pair wing, and the operator wing and secondary wing can be with three main three pairs, two
Main two is secondary.Wing 2 includes that the first protrusion 21 of 1 upper surface of connecting shaft is arranged in and is arranged on 1 side of connecting shaft second convex
Play 22；First protrusion 21 and the second protrusion 22 include multiple.First cutting tooth 3 can be set in the lower end surface of the second protrusion 22
On, and the lower end surface of the second protrusion 22 is towards connecting shaft 1.First cutting tooth 3 can be arranged along 1 circumference of connecting shaft.
By being provided with the first cutting tooth on the cutting face of work when wing carries out reaming, in reaming by the first cutting
The borehole wall in tooth contact, the end face for avoiding wing are directly contacted with the borehole wall；Reaming can be improved by the rotation of the first cutting tooth
Efficiency, subtract
As shown in Figure 1, being provided with the second cutting tooth 4 in the first protrusion 21 of wing 2, the second cutting tooth 4 is located at wing 2
Upper surface, the cutting face of the second cutting tooth 4 is backwards to connecting shaft 1.The main function of second cutting tooth 4 is to carry out drilling well work in drill bit
When industry, the rock etc. in shaft bottom is cut.Second cutting tooth 4 can be set perpendicular to the upper surface of the first protrusion 21 of wing 2
It sets, out of plumb can also be arranged between the upper surface of the first protrusion 21, the set-up mode of the second cutting tooth 4 is mainly according in reality
The working environment when use of border is specifically arranged, and does not limit specifically.
Third cutting tooth 5 is provided in second protrusion 22 of wing 2, third cutting tooth 5 is located at the side of wing 2, third
The main function of cutting tooth 5 is to cut when drill bit carries out drillng operation the rock etc. of the borehole wall.Third cutting tooth 5 can
It is arranged with the side wall of the second protrusion 22 perpendicular to wing 2, out of plumb can also be arranged between the side wall of the second protrusion 22, the
The set-up mode of three cutting tooths 5 is mainly specifically arranged according to working environment in actual use, does not limit specifically.
In a preferred embodiment, the first cutting tooth 3 includes top 31 and bottom 32, and top 31 is the first cutting tooth
3 parts with cutting face, bottom 32 are that the part on wing 2 is arranged in the first cutting tooth 3.In order to enable the first cutting tooth 3
With the bigger area of cut, attack is improved, the diameter at the top 31 of the first cutting tooth 3 is greater than the bottom of the first cutting tooth 3
32 diameter.
When the main function of cutting tooth is that drill bit carries out drilling well, it is broken that cutting is carried out to rock.Therefore the intensity of cutting tooth
Meet certain requirement.PDC can be set in first cutting tooth 3.PDC(Polycrystalline diamond
It compact) is a kind of cutting element for welding together man-made polycrystalline diamond and tungsten carbide pedestal at high temperature under high pressure.It cuts
It cuts element to be arranged on the cutting face of the first cutting tooth 3, to substitute former cutting face.First face of cutting for cutting tooth 3 can be ball
Shape or ellipsoidal structure.The quantity and arrangement mode of first cutting tooth 3 can be designed according to the actual needs, this implementation
Example does not limit the quantity and arrangement mode of the first cutting tooth 3.
Preferably, the cutting demand of the cutting tooth at other positions is considered, in the second cutting tooth 4 and third cutting tooth 5
PDC cutting element can be set to improve the attack of cutting tooth.
When drilling tool carry out reaming operation when, the first cutting tooth 3 being arranged on the end face of wing 2 contacted with the borehole wall into
And cutting is carried out to the borehole wall and is crushed, the lower end surface that such design method can be avoided PDC drill bit 7 is directly contacted with the borehole wall,
The damage of rock on the borehole wall to the lower end surface of drill bit is prevented, while also improving the working efficiency of drilling tool reaming.
(or perhaps cutting tooth geometry designs are roots to the compatibility of the geometry designs of cutting tooth and drilling strata clay content
Designed according to clay content in stratum) there is substantial connections.Containing clay water-swellable in stratum is that wellbore is caused to contract
The key of diameter, and the height of clay content directly affects reaming and is hampered the size of power.Clay content is higher, and undergauge is more obvious,
The cutting tooth cutting power then needed is stronger.
According to results of laboratory: first cuts the design parameter of cutting tooth 3 and the relationship empirical formula of stratum content of mudstone
Are as follows:
In formula:The shale content on-stratum；
The interval time of t- reaming twice；
K-empirical relevant to drill body diameter, drill bit wing quantity；
N- the first cutting tooth number；
D-the first cutting tooth top diameter (mm)；
D-the first cutting tooth base diameter (mm)；
H-first cuts tooth height (mm)；
E-is constant.
Parameter declaration: it is once designed according to current every 40-50m back reaming.
As drilling strata clay content 5-10%, 1 the first cutting tooth 3, top diameter 9mm, base diameter are installed
7mm, 3 height 10mm effect of the first cutting tooth are best.
As drilling strata clay content 5-15%, 1 the first cutting tooth 3, top diameter 10mm, base diameter are installed
7mm, 3 height 10mm effect of the first cutting tooth are best.
As drilling strata clay content 15-20%, 2 the first cutting tooths 3, top diameter 10mm, base diameter are installed
7mm, 3 height 9mm effect of the first cutting tooth are best.
As drilling strata clay content 20-25%, 2 the first cutting tooths 3, top diameter 11mm, base diameter are installed
8mm, the high 8mm effect of the first cutting tooth 3 are best.
When drilling strata clay content is greater than 25%, installation 2-3 the first cutting tooths 3, top diameter 12mm, bottom is straight
Diameter 12mm, the high 9mm effect of cutting tooth are best.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch
It states, many embodiments and many applications except provided example all will be aobvious and easy for a person skilled in the art
See.Therefore, the range of this introduction should not be determined referring to foregoing description, but should referring to appended claims and this
The full scope of the equivalent that a little claims are possessed determines.For comprehensive purpose, all articles and with reference to including special
The disclosure of benefit application and bulletin is all by reference to being incorporated herein.Theme disclosed herein is omitted in preceding claims
Any aspect is not intended to abandon the body matter, also should not be considered as inventor the theme is not thought of as it is disclosed
A part of subject matter.
Claims (7)
1. a kind of drilling tool characterized by comprising
Drilling tool ontology；
PDC drill bit on drilling tool ontology is set；
The PDC drill bit includes:
Connecting shaft with axis；
Multiple wings in the connecting shaft are set；
The wing is provided with the first cutting tooth in the part for stretching out the connecting shaft, the cutting face of first cutting tooth towards
The center line of the connecting shaft, first cutting tooth is parallel with the axis of the connecting shaft；The PDC drill bit includes that setting exists
Third cutting tooth on the wing, the third cutting tooth are located at the side of the wing；
The size of first cutting tooth meets relational expression:
Wherein:For the shale content on stratum, t is the interval time of reaming twice, and K is and drill body diameter, wing quantity
Relevant empirical, N are the first cutting tooth number, and D is the first cutting tooth top diameter (mm), and d is the first cutting tooth bottom
Diameter (mm), h are cutting tooth height (mm), and e is natural constant.
2. drilling tool according to claim 1, which is characterized in that the PDC drill bit includes being arranged on the wing
The second cutting tooth, the cutting face of second cutting tooth is backwards to the connecting shaft.
3. drilling tool according to claim 1, which is characterized in that first cutting tooth is backwards to the connection shaft portion
Diameter be greater than first cutting tooth towards it is described connection shaft portion diameter.
4. drilling tool according to claim 1, which is characterized in that first cutting tooth is PDC cutting tooth.
5. drilling tool according to claim 2, which is characterized in that second cutting tooth is PDC cutting tooth.
6. drilling tool according to claim 1, which is characterized in that the third cutting tooth is PDC cutting tooth.
7. according to any one of drilling tool of claim 4 to 6, which is characterized in that the PDC cutting tooth includes base
Seat and composite sheet, the composite sheet are arranged on the pedestal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511000346.2A CN105545212B (en) | 2015-12-28 | 2015-12-28 | drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511000346.2A CN105545212B (en) | 2015-12-28 | 2015-12-28 | drilling tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105545212A CN105545212A (en) | 2016-05-04 |
| CN105545212B true CN105545212B (en) | 2019-01-18 |
Family
ID=55824717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511000346.2A Active CN105545212B (en) | 2015-12-28 | 2015-12-28 | drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105545212B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110924870A (en) * | 2019-12-26 | 2020-03-27 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | Reaming drill bit with cleaning function and using method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201620762U (en) * | 2010-01-13 | 2010-11-03 | 四川川石金刚石钻头有限公司 | Composite-type back reaming drill bit |
| CN202767888U (en) * | 2012-05-25 | 2013-03-06 | 中煤科工集团西安研究院 | Hinged drill bit with inner center capable of being opened and closed |
| WO2015111016A1 (en) * | 2014-01-24 | 2015-07-30 | Tercel Ip Limited | Drill bit for drilling a borehole |
| CN104989281A (en) * | 2015-07-17 | 2015-10-21 | 盘锦裕达钻采工具制造有限公司 | Gauge protection repairable steel PDC drill bit and gauge protection repairing method of steel PDC drill bit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7487849B2 (en) * | 2005-05-16 | 2009-02-10 | Radtke Robert P | Thermally stable diamond brazing |
-
2015
- 2015-12-28 CN CN201511000346.2A patent/CN105545212B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201620762U (en) * | 2010-01-13 | 2010-11-03 | 四川川石金刚石钻头有限公司 | Composite-type back reaming drill bit |
| CN202767888U (en) * | 2012-05-25 | 2013-03-06 | 中煤科工集团西安研究院 | Hinged drill bit with inner center capable of being opened and closed |
| WO2015111016A1 (en) * | 2014-01-24 | 2015-07-30 | Tercel Ip Limited | Drill bit for drilling a borehole |
| CN104989281A (en) * | 2015-07-17 | 2015-10-21 | 盘锦裕达钻采工具制造有限公司 | Gauge protection repairable steel PDC drill bit and gauge protection repairing method of steel PDC drill bit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105545212A (en) | 2016-05-04 |
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