CN109538125A - Drill bit with centralizer - Google Patents
Drill bit with centralizer Download PDFInfo
- Publication number
- CN109538125A CN109538125A CN201811476064.3A CN201811476064A CN109538125A CN 109538125 A CN109538125 A CN 109538125A CN 201811476064 A CN201811476064 A CN 201811476064A CN 109538125 A CN109538125 A CN 109538125A
- Authority
- CN
- China
- Prior art keywords
- centralizer
- gear wheel
- drill body
- drill bit
- drill
- 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
- 239000007787 solid Substances 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims 1
- 235000019698 starch Nutrition 0.000 claims 1
- 239000011435 rock Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 9
- 238000005553 drilling Methods 0.000 description 7
- 239000002689 soil Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000010959 steel Substances 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
- E21B10/08—Roller 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
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
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 present invention provides a kind of drill bits with centralizer, including drill body, tire, gear wheel, the gear teeth and centralizer, three tires, which are annularly spaced, is connected in drill body side, gear wheel is rotatably connected on tire, three gear wheel axis extended lines and drill body axis coincide with a bit, several gear teeth, which are annularly spaced, to be connected on gear wheel, centralizer is erected on the drill body between gear wheel, centralizer outer diameter and gear wheel closed angle end spacing are 10mm, centralizer protrudes outside gear wheel far from drill body one end, the present invention, which has, makes drill bit put on right position automatically, guarantees the vertical advantage of borehole axis.
Description
Technical field
The present invention relates to oil-well drilling equipment fields, specifically, being related to a kind of drill bit with centralizer.
Background technique
Drill bit is the chief component of drilling equipment, and main function is broken pure rock, forms wellbore；Rotary drilling-head is
The drill bit that petroleum industry generally uses at present, rotary drilling-head can generate rotation under mechanical drive, to drive entire drill bit
It generates centripetal movement, and cuts by invading, grind and make rock generation slight crack and be crushed, play the role of drilling downwards；One wellbore
Formed fine or not, the length of time used is related with the performance of the characteristic of drilled strata rock and drill bit itself, drill bit it is reasonable
Type selecting plays an important role to raising rate of penetration, reduction drilling well overall cost.
Conventional drill bit at work, as drilling depth increases, elongate, then to the direction of feed of drill bit by run of steel
It is more difficult to control, and drill bit is when rotated, it can be different because of each gear wheel institute stress, and it is different size of so that drill bit is obtained different directions
Reaction force can make drill bit direction of feed shift at this time, if righting not in time, wellbore shape can be made irregular, shadow
Ring the insertion of subsequent casings.
Summary of the invention
In place of solving above-mentioned the deficiencies in the prior art, the purpose of the present invention is to provide a kind of brills with centralizer
Head, to overcome defect in the prior art.
To achieve the goals above, the present invention provides a kind of drill bit with centralizer, including drill body, tire, gear wheel,
The gear teeth and centralizer, three tires, which are annularly spaced, is connected in drill body side, and gear wheel is rotatably connected on tire, three roller axles
Line extended line and drill body axis coincide with a bit, several gear teeth, which are annularly spaced, to be connected on gear wheel, and centralizer is erected at gear wheel
Between drill body on, centralizer outer diameter and gear wheel closed angle end spacing are 10mm, centralizer far from the prominent gear wheel in drill body one end outside.
By using above-mentioned technical proposal, centralizer, which is arranged, to abut rock stratum in bit operation using front end face, increase
The plane contact of drill bit and rock stratum makes the direction of feed of drill bit be not easily susceptible to the Effect of Rotation of gear wheel and drill body, ensures that drill bit can
It is moved along fixed-direction；It is 10mm that spacing between centralizer and gear wheel gear wheel closed angle end is arranged simultaneously, not only avoid gear wheel with
Centralizer interferes, while being also avoided that landwaste enters the rotation in the gap between gear wheel and being clamped gear wheel, ensures gear wheel
Rock stratum can smoothly be cut.
As to further explanation of the invention, it is preferable that three gear wheel maximum outside diameters are greater than drill body outer diameter and gear teeth tooth
The vertical gear wheel axis in sharp direction.
By using above-mentioned technical proposal, it can avoid drill body and be in contact and wear with palisades.
As to further explanation of the invention, it is preferable that centralizer is fixed with guide post, guide post far from drill body one end
It is coniform.
By using above-mentioned technical proposal, guide post is set when drill bit enters soil layer, using guide post be inserted into soil layer into
The preliminary punching of row, subsequent gear wheel carry out reaming, then the direction of feed of drill bit reduces the influence of gear wheel rotation and is able to maintain that original side
To raising guiding efficiency makes centralizer that can provide righting effect in a variety of environment for drill bit.
As to further explanation of the invention, it is preferable that interval is fixed with several righting teeth on guide post circular conical surface,
Righting tooth tooth tip is identical as guide post direction.
By using above-mentioned technical proposal, righting tooth, which is arranged, so that guide post is also inserted into rock stratum in bit and rise
Guiding role improves the suitability of guide post.
As to further explanation of the invention, it is preferable that guide post sharp corner offers mud nozzle, mud nozzle with
Drill body communicates.
By using above-mentioned technical proposal, the mud after can making pressurization flows out on palisades from drill bit, not only acts as dimension
The effect that rock pressure avoids blowout is held, may also function as the effect of cooling drill bit.
As to further explanation of the invention, it is preferable that be fixed with pillar between centralizer and drill body, pillar outer diameter is small
In centralizer outer diameter.
By using above-mentioned technical proposal, pillar, which is arranged, can reduce the weight of centralizer, and then reduce the weight of drill bit, just
In transport.
The invention has the following advantages:
1, the present invention is subject to anti-by setting centralizer by the plane contact of increase drill bit and palisades when reducing bit
Active force influences, and keeps drill bit direction of feed more stable；
2, the operating mode of reaming after drill bit being made to form first drilling in soil layer by setting guide post, reduces gear wheel and directly bores
The influence in hole further stablizes drill bit direction of feed；
3, guide post can be made to be also transferred in rock stratum by the way that righting tooth is arranged, improves the suitability of guide post.
Detailed description of the invention
Fig. 1 is general assembly effect picture of the invention；
Fig. 2 is top view of the invention；
Fig. 3 is side view of the invention.
Description of symbols:
1, drill body；2, tire；3, gear wheel；31, inclined-plane；4, the gear teeth；5, pillar；6, centralizer；61, guide post；62, righting tooth；
63, mud nozzle.
Specific embodiment
It is attached now in conjunction with appended preferred embodiment in order to further appreciate that structure of the invention, feature and other purposes
With attached drawing, detailed description are as follows, this attached drawing embodiment described is only used to illustrate the technical scheme of the present invention, and non-limiting
Invention.
A kind of drill bit with centralizer, in conjunction with Fig. 1, Fig. 2, including drill body 1, tire 2, gear wheel 3, the gear teeth 4 and centralizer
6, drill body 1 be it is cylindric, tire 2 is factory's font steelframe, and annularly interval is connected in 1 outside of drill body for three tires 2, and gear wheel 3 is
Coniform, three gear wheels 3 are rotatably connected on respectively on three tires 2, and three 3 axis extended lines of gear wheel are overlapped with 1 axis of drill body
In a bit, several inclined-planes 31 are offered on gear wheel 3, several gear teeth 4 are annularly spaced and are connected on inclined-plane 31, and three gear wheels 3 are most
Big outer diameter is greater than vertical 3 axis of gear wheel of 1 outer diameter of drill body and 4 tooth tip direction of the gear teeth, can avoid drill body 1 and is in contact and grinds with palisades
Damage；Be fixed with pillar 5 between drill body 1 and gear wheel 3, pillar 5 be it is cylindric, centralizer 6 is cylindrical metal stick, and centralizer 6 is solid
Pillar 5 is connected in far from 1 one end of drill body, 5 outer diameter of pillar is less than 6 outer diameter of centralizer, and setting pillar 5 not only acts as supporting centralizer 6
Effect, can also reduce the weight of centralizer 6, and then reduce the weight of drill bit, be transported convenient for drill bit；6 outer diameter of centralizer and tooth
Taking turns 3 closed angle end spacing is 10mm, and centralizer 6 protrudes outside gear wheel 3 far from 1 one end of drill body.
In conjunction with Fig. 1, Fig. 2, centralizer 6, which is arranged, to abut rock stratum in bit operation using front end face, increase drill bit and rock
The plane contact of layer makes the direction of feed of drill bit be not easily susceptible to the Effect of Rotation of gear wheel 3 and drill body 1, ensures that drill bit can be along fixation
Direction is mobile；The spacing being arranged between 3 gear wheel closed angle end of centralizer 6 and gear wheel simultaneously is 10mm, not only avoids gear wheel 3 and righting
Device 6 interferes, while being also avoided that in gap that landwaste enters between gear wheel 3 and being clamped the rotation of gear wheel 3, ensures gear wheel 3
Rock stratum can smoothly be cut.
In conjunction with Fig. 1, Fig. 2, centralizer 6 is fixed with guide post 61 far from 1 one end of drill body, and guide post 61 is coniform, setting
Guide post 61 is inserted into soil layer using guide post 61 and is tentatively punched when drill bit enters soil layer, and subsequent gear wheel 3 carries out reaming,
The operating mode of reaming after making drill bit form first drilling in soil layer, then the direction of feed of drill bit reduces the influence that gear wheel 3 rotates
And it is able to maintain that former direction, guiding efficiency is improved, makes centralizer 6 that can provide righting effect in a variety of environment for drill bit.
In conjunction with Fig. 1, Fig. 3, interval is fixed with several righting teeth 62 on 61 circular conical surface of guide post, 62 tooth tip of righting tooth with lead
Identical to 61 axis direction of column, setting righting tooth 62 can be such that guide post 61 is also inserted into rock stratum and play guiding work in bit
With the suitability of raising guide post 61；61 sharp corner of guide post offers mud nozzle 63, and mud nozzle 63 is communicated with drill body 1,
Mud after can making pressurization flows out on palisades from drill bit, not only acts as the effect for maintaining rock pressure to avoid blowout, may be used also
Play the role of cooling drill bit.
It is to be understood that foregoing invention content and specific embodiment are intended to prove technical solution provided by the present invention
Practical application should not be construed as limiting the scope of the present invention.Those skilled in the art are in spirit and principles of the present invention
It is interior, when can various modifications may be made, equivalent replacement or improvement.Protection scope of the present invention is subject to the appended claims.
Claims (6)
1. a kind of drill bit with centralizer, which is characterized in that including drill body (1), tire (2), gear wheel (3), the gear teeth (4) and help
Positive device (6), annularly interval is connected in drill body (1) side to three tires (2), and gear wheel (3) is rotatably connected on tire (2), and three
A gear wheel (3) axis extended line and drill body (1) axis coincide with a bit, several gear teeth (4) are annularly spaced and are connected gear wheel (3)
On, centralizer (6) is erected on the drill body (1) between gear wheel (3), and centralizer (6) outer diameter is with gear wheel (3) closed angle end spacing
10mm, centralizer (6) protrude gear wheel (3) outside far from drill body (1) one end.
2. the drill bit according to claim 1 with centralizer, which is characterized in that three gear wheel (3) maximum outside diameters are greater than
Vertical gear wheel (3) axis of drill body (1) outer diameter and the gear teeth (4) tooth tip direction.
3. the drill bit according to claim 2 with centralizer, which is characterized in that centralizer (6) is far from drill body (1) one end
It is fixed with guide post (61), guide post (61) is coniform.
4. the drill bit according to claim 3 with centralizer, which is characterized in that be spaced on guide post (61) circular conical surface solid
Several righting teeth (62) are connected with, righting tooth (62) tooth tip is identical as guide post (61) direction.
5. the drill bit according to claim 4 with centralizer, which is characterized in that guide post (61) sharp corner offers mud
It starches nozzle (63), mud nozzle (63) is communicated with drill body (1).
6. the drill bit according to claim 5 with centralizer, which is characterized in that solid between centralizer (6) and drill body (1)
It is connected with pillar (5), pillar (5) outer diameter is less than centralizer (6) outer diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811476064.3A CN109538125A (en) | 2018-12-04 | 2018-12-04 | Drill bit with centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811476064.3A CN109538125A (en) | 2018-12-04 | 2018-12-04 | Drill bit with centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109538125A true CN109538125A (en) | 2019-03-29 |
Family
ID=65853696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811476064.3A Pending CN109538125A (en) | 2018-12-04 | 2018-12-04 | Drill bit with centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109538125A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112012662A (en) * | 2020-10-20 | 2020-12-01 | 胜利油田固邦石油装备有限责任公司 | Lengthened PDC drill bit with centralizer |
-
2018
- 2018-12-04 CN CN201811476064.3A patent/CN109538125A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112012662A (en) * | 2020-10-20 | 2020-12-01 | 胜利油田固邦石油装备有限责任公司 | Lengthened PDC drill bit with centralizer |
| CN112012662B (en) * | 2020-10-20 | 2021-01-05 | 胜利油田固邦石油装备有限责任公司 | Lengthened PDC drill bit with centralizer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190329 |
|
| WD01 | Invention patent application deemed withdrawn after publication |