CN204002567U - Three wing particle impacting drill bits - Google Patents
Three wing particle impacting drill bits Download PDFInfo
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- CN204002567U CN204002567U CN201420166653.2U CN201420166653U CN204002567U CN 204002567 U CN204002567 U CN 204002567U CN 201420166653 U CN201420166653 U CN 201420166653U CN 204002567 U CN204002567 U CN 204002567U
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Abstract
The utility model belongs to petroleum drilling technology field, be particularly related to a kind of three wing particle impacting drill bits, comprise bit matrix and bit central body, external week of bit central is evenly equipped with three wings, is chip area between adjacent wing, on the outer face of wing, is distributed with gauge teeth, outside and the bottom of gauge teeth are distributed with cutting teeth, run through wing inside runner is set, flow field end installation side nozzle, arranges central nozzle on bit central body.After in the utility model, particle sprays at a high speed by the nozzle of particular design, impact grinding rock, and then by drill bit fractured rock, changed the broken rock mode of traditional drill bit, improve the efficiency of breaking rock of drill bit.
Description
Technical field
The utility model relates to a kind of three wing particle impacting drill bits, is applicable to strata drilling hard, extremely hard and that abrasion resistance is strong, belongs to petroleum drilling technology field.
Background technology
Particle impacting drill bit from most of by impacting, grind, the conventional drill of scraping hard formation is different, the utilization of particle impacting drill bit joins medium and small hard steel grit of drilling fluid and comes explosion stratum.The rock break-off process of particle impacting drill bit is, before drill bit fractured rock, first strengthen after the nozzle high speed ejection of steel grit by particular design, impact grinding rock, and then by drill bit fractured rock, changed the broken rock mode of traditional drill bit, improve the efficiency of breaking rock of drill bit, because had the broken rock effect of particle, compared with common mode, alleviated the requirement to the pressure of the drill and moment of torsion.Drill string is during than common creeping into, and suffered power is much smaller, and stressed simpler, has therefore reduced widely the probability of drill string and drilling tool fatigue failure, has reduced the number of times of round trip, has shortened drilling period, reduces drilling cost.
From the proposition of this technology, through a series of indoor and field trial, by the optimization to drill bit structure and material, experience following several drill bit structures:
1. what first occur is four drill bit wings, four nozzles, the centerbody drill bit without nozzle arrangements, and this drill bit has between four drill bit wings, drill bit wing and respectively has a little chip area, and discharge launder has four.Four nozzles are arranged on four drill bit wings, there is no nozzle on centerbody, and nozzle form is column type nozzle, have four inner flow passages, are connected respectively with four nozzles.But there is following defect in this drill bit: 1. drill bit flank number causes the volume of each drill bit flank too little too much, insufficient strength; 2. chip area is too little, and landwaste can not be got rid of in time; 3. on bit central body without nozzle, efficiency of breaking rock is not high; 4. arrangement of nozzles position, angle and unreasonable structure, efficiency of breaking rock is not high and life-span nozzle is too low.
2. and then occurred that four drill bit wings, five nozzles, centerbody have the drill bit of nozzle arrangements, this drill bit has four drill bit wings, respectively has a little chip area between drill bit wing, and discharge launder has four.Nozzle has five, wherein has four nozzles to be arranged on four drill bit wings, and one is arranged on centerbody, and nozzle form is column type nozzle, has five inner flow passages, is connected respectively with five nozzles.This drill bit has solved the not high problem of drill bit efficiency of breaking rock mentioned above, but also has following problem not solve:
1. drill bit flank number causes the volume of each drill bit flank too little too much, insufficient strength; 2. chip area is too little, and landwaste can not be got rid of in time; 3. drill bit inner flow passage unreasonable structure; 4. arrangement of nozzles position, angle and unreasonable structure, efficiency of breaking rock is not high and life-span nozzle is too low.
Utility model content
The technical problems to be solved in the utility model is: provide a kind of rational in infrastructure, firm, can improve brokenly three wing particle impacting drill bits of rock speed and raising working life.
Three wing particle impacting drill bits described in the utility model, comprise bit matrix and bit central body, external week of bit central is evenly equipped with three wings, it between adjacent wing, is chip area, on the outer face of wing, be distributed with gauge teeth, outside and the bottom of gauge teeth are distributed with cutting teeth, run through wing inside runner is set, flow field end installation side nozzle, arranges central nozzle on bit central body.
Between wing and centerbody, have three large discharge launders, fragmented rock and particle directly enter annular space from large chip area, along with drilling fluid returns together to ground; Particle penetrates after accelerating from nozzle, impacts bottom rock surface with certain speed.Particle contacts as the contact of some face with the initial of rock surface, and both contact areas are very little, so the temporary impact compressive force producing on rock is especially large.Under the parameters combination of optimizing, this instantaneous compressive force can exceed the dynamic compressive strength of rock, and causing particle below is the rock pressurized generation fragmentation at initial contact point place, and is formed at the parallel middle crack of impact direction in fragmentation place bottom.Meanwhile, the moment contacting with rock at particle, compression stress wave together with contact interface is propagated with rock to particle respectively.Compressional wave in particle reflects while being transmitted to the other end of particle, becomes stretching ripple, and this back wave will return to contact surface and again through injecting in rock at interface, with the compressional wave acting in conjunction of importing into before in rock.
Described wing is arc, arranges 5 gauge teeths and 14 cutting teeths on each wing.Gauge teeth improves on the one hand abrasion resistance, the impact resistance of drill bit, reduces the lower number of times that bores, and has improved on the other hand the stability of drill bit, has a certain effect to anti-oblique.Cutting teeth on arc wing is arranged in a certain way and can be cut fast by the rock of particle impacting, accelerates broken rock speed, accelerates to creep into.
Described side nozzle is the straight shape of cone, side nozzle and center line of bit are 12 °～16 ° layouts, central nozzle and center line of bit are 20 °～24 °, side nozzle cylindrical section length and outlet diameter ratio are 5, the outlet diameter of central nozzle is 12～16mm, and the outlet diameter of side nozzle is 10～14mm.Find through numerical simulation and laboratory study, the broken rock mass of nozzle Particle Erosion of arranging is like this long-pending maximum, and rock breaking efficiency is best.
Described central nozzle outlet diameter is 14mm, and drill bit side nozzle outlet diameter is 12mm.
The beneficial effects of the utility model are:
Particle flux enters drill bit inner flow passage from drill bit top, then by the ejection at a high speed of four high pressure nozzles, tensile stress and shear stress that particle impacting effect produces exceed after the ultimate strength of rock, fracture propagation in rock, strength decreased, easily broken hole and the generation spliced body of forming, is conducive to the generation of rock " volumetric fracture ".In conjunction with the broken rock effect of cutting teeth, utilize the mode of hydraulic blow effect and mechanism combined-breaking rock simultaneously, form the radially rock ansa of certain position of well centre.
Between drill bit flank, have three large discharge launders, fragmented rock and particle directly enter annular space from large chip area, along with drilling fluid returns together to ground.The rock ansa that Cutter forms with the broken shaft bottom of mode of extrusion expansion under the effect of low the pressure of the drill and low moment of torsion.Rock ansa has discharged original stress, makes along " chip hold down effect " disappearance of the rock of cutting teeth action direction, and the external and internal pressure of rock ansa approaches, and the strength decreased of rock is easily broken.This broken rock mode can produce rock volume fragmentation, is not increasing under the condition of the pressure of the drill and moment of torsion, the well depth that has improved bit speed and can reach, and the larger landwaste producing is conducive to well logging.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure: 1, bit matrix 2, bit central body 3, gauge teeth 4, cutting teeth 5, wing 6, side nozzle 7, central nozzle 8, runner.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described further:
As shown in Figure 1, three wing particle impacting drill bits described in the utility model, comprise bit matrix 1 and bit central body 2, bit central body 2 peripheries are evenly equipped with three wings 5, between adjacent wing 5, are chip area, are distributed with gauge teeth 3 on the outer face of wing 5, the outside of gauge teeth 3 and bottom are distributed with cutting teeth 4, run through wing 5 inside runner 8 is set, runner 8 end installation side nozzles 6, arrange central nozzle 7 on bit central body 2.Wing 5 is arc, arranges 3 and 14 cutting teeths 4 of 5 gauge teeths on each wing 5.Side nozzle 6 is the straight shape of cone, side nozzle 6 is 12 ° of layouts with center line of bit, and central nozzle 7 is 20 ° with center line of bit, and side nozzle 6 cylindrical section length and outlet diameter ratio are 5, central nozzle 7 outlet diameters are 14mm, and drill bit side nozzle 6 outlet diameters are 12mm.
Steel body particle penetrates respectively under the acceleration of drilling fluid from four nozzles, and impact grinding bottom rock forms crack, and then, under the drilling fluid of high-pressure injection and the effect of Cutter 4 combined-breaking rocks, crack develops rapidly and expands, and rock is further broken.All landwaste after fragmentation are taken out of by drilling fluid by discharge launder.This drill bit is applicable to bore the stratum of meeting extremely hard and utmost point abrasion resistance, can increase substantially the utilization rate of energy, and its bit speed is 2 to 3 times of conventional drilling.
Claims (1)
1. a wing particle impacting drill bit, comprise bit matrix (1) and bit central body (2), it is characterized in that: bit central body (2) periphery is evenly equipped with three wings (5), between adjacent wing (5), it is chip area, on the outer face of wing (5), be distributed with gauge teeth (3), the outside of gauge teeth (3) and bottom are distributed with cutting teeth (4), run through wing (5) inside runner (8) is set, runner (8) end installation side nozzle (6), arranges central nozzle (7) on bit central body (2); Wing is arc, upper 5 gauge teeths (3) and 14 cutting teeths (4) arranged of each wing (5); Side nozzle (6) is the straight shape of cone, side nozzle (6) is 12 °～16 ° layouts with center line of bit, central nozzle (7) is 20 °～24 ° with center line of bit, side nozzle (6) cylindrical section length and outlet diameter ratio are 5, the outlet diameter of central nozzle (7) is 12～16mm, and the outlet diameter of side nozzle (6) is 10～14mm; Central nozzle (7) outlet diameter is 14mm, and drill bit side nozzle (6) outlet diameter is 12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420166653.2U CN204002567U (en) | 2014-04-08 | 2014-04-08 | Three wing particle impacting drill bits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420166653.2U CN204002567U (en) | 2014-04-08 | 2014-04-08 | Three wing particle impacting drill bits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204002567U true CN204002567U (en) | 2014-12-10 |
Family
ID=52042587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420166653.2U Expired - Fee Related CN204002567U (en) | 2014-04-08 | 2014-04-08 | Three wing particle impacting drill bits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204002567U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790452A (en) * | 2015-03-31 | 2015-07-22 | 三一重机有限公司 | Particle impact crushing system applied to excavator and crushing method of particle impact crushing system |
| CN105275402A (en) * | 2015-11-12 | 2016-01-27 | 中国石油大学(华东) | Particle jet flow-based drill bit for impacting and breaking rocks |
| CN107989554A (en) * | 2017-12-18 | 2018-05-04 | 中国石油集团川庆钻探工程有限公司 | Particle impact PDC drilling bit |
| CN111608589A (en) * | 2020-05-19 | 2020-09-01 | 中国石油化工股份有限公司石油工程技术研究院 | Bottom hole stress induction unloading drill bit and method for improving drilling speed thereof |
-
2014
- 2014-04-08 CN CN201420166653.2U patent/CN204002567U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104790452A (en) * | 2015-03-31 | 2015-07-22 | 三一重机有限公司 | Particle impact crushing system applied to excavator and crushing method of particle impact crushing system |
| CN104790452B (en) * | 2015-03-31 | 2017-03-22 | 三一重机有限公司 | Particle impact crushing system applied to excavator and crushing method of particle impact crushing system |
| CN105275402A (en) * | 2015-11-12 | 2016-01-27 | 中国石油大学(华东) | Particle jet flow-based drill bit for impacting and breaking rocks |
| CN105275402B (en) * | 2015-11-12 | 2018-01-30 | 中国石油大学(华东) | Particle stream flow rock fracture in dynamic indentation drill bit |
| CN107989554A (en) * | 2017-12-18 | 2018-05-04 | 中国石油集团川庆钻探工程有限公司 | Particle impact PDC drilling bit |
| CN111608589A (en) * | 2020-05-19 | 2020-09-01 | 中国石油化工股份有限公司石油工程技术研究院 | Bottom hole stress induction unloading drill bit and method for improving drilling speed thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20150408 |
|
| EXPY | Termination of patent right or utility model |