CN112681980A - Directional jetting cooling PDC drill bit - Google Patents
Directional jetting cooling PDC drill bit Download PDFInfo
- Publication number
- CN112681980A CN112681980A CN202011594389.9A CN202011594389A CN112681980A CN 112681980 A CN112681980 A CN 112681980A CN 202011594389 A CN202011594389 A CN 202011594389A CN 112681980 A CN112681980 A CN 112681980A
- Authority
- CN
- China
- Prior art keywords
- directional
- drill bit
- nozzles
- cutting teeth
- cutting
- 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.)
- Granted
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses a directional jet cooling PDC drill bit, which belongs to the technical field of drilling such as petroleum and natural gas, mine engineering, geothermal wells, construction foundation engineering construction, geology, hydrology and the like, and comprises a drill bit main body and a plurality of blades, wherein each blade is provided with a cutting tooth; the drill bit main body is further provided with a plurality of groups of directional nozzles and conventional nozzles, each group of directional nozzles and each conventional nozzle are located between two adjacent blades, and an outlet of each group of directional nozzles corresponds to the tooth tip of the cutting tooth on each blade. According to the invention, when the cutting teeth of the drill bit cut rock, the slurry sprayed out of the directional nozzle is directionally sprayed to the tooth tip part of the cutting teeth for cutting the rock, so that the cutting teeth are rapidly cooled and cooled, the cutting teeth are prevented from being thermally damaged due to cutting heat, the performance of the cutting teeth is greatly improved, the service life of the drill bit is prolonged, the footage of a single drill bit is improved, and the slurry sprayed out of the directional nozzle can also be used for removing rock debris generated by cutting of the cutting teeth, so that the rock debris can not be adhered to the cutting teeth, and the mud pocket of the drill bit is prevented; meanwhile, the mud sprayed by the directional nozzles has high flow speed and high pressure, and can assist the cutting teeth to break rock and improve the rock breaking efficiency of the drill bit.
Description
Technical Field
The invention belongs to the technical field of drilling of petroleum and natural gas, mine engineering, geothermal wells, construction foundation engineering construction, geology, hydrology and the like, and particularly relates to a directional jet cooling PDC drill bit.
Background
Since the 20 th century and 80 th era, the PDC drill bit has become a main drill bit for oil and gas drilling due to the unique shearing rock breaking mode, high mechanical drilling speed and long service life in homogeneous sand-shale formations with soft to medium hardness and even high hardness; the hydraulic structure design of the PDC drill bit mainly comprises a nozzle and a flow passage, and is further optimized in the aspects of the number and the layout of blades, the strength and the tooth arrangement of a composite sheet, the size of an inclination angle, the layout of a section, the type of a crown surface, the design of the nozzle flow passage and the like aiming at the corresponding lithology characteristics.
At present, in order to strengthen drilling parameters, high drilling pressure, high displacement and high rotating speed are generally adopted for drilling, and a PDC drill bit is often directly matched with a high-speed screw or a turbine drilling tool for use, so that the rotating speed of the drill bit reaches 200-1000 RPM in the drilling process. The higher the rotating speed is, the higher the linear velocity of the cutting teeth on the PDC drill bit in the rock cutting process is, the heat generated by the cutting teeth in the rock breaking process cannot be dissipated in a short time, the instantaneous temperature of the cutting teeth and the rock is increased, the thermal stability of the cutting teeth is greatly reduced, microcracks crossing the cutting teeth can be generated when the temperature of the cutting teeth reaches 750 ℃, and the abrasion of the cutting teeth is more serious when the temperature of the cutting teeth is higher than 750 ℃, so that the service life of the PDC drill bit is seriously influenced.
Disclosure of Invention
The invention aims to provide a directional jet cooling PDC drill bit to solve the problems.
In order to realize the purpose of the invention, the technical scheme is as follows: a directional jet cooling PDC drill bit comprises a drill bit main body and a plurality of blades, wherein the lower end of each blade is provided with a gauge protection structure, and each blade is provided with a cutting tooth; the drill bit main body is also provided with a plurality of groups of directional nozzles and conventional nozzles, and the outlet of each group of directional nozzles corresponds to the cutting teeth on each blade.
Further, the number of the directional nozzles in each group of the directional nozzles is multiple, and the outlets of the multiple directional nozzles jointly correspond to the multiple cutting tooth tips on the blade.
Furthermore, a boss is further arranged on the front knife face of the knife wing, and the same group of directional nozzles are all positioned on the boss.
Further, the directional nozzle is positioned in a chip groove between two adjacent blades.
Further, the directional nozzle is located on the flank of the adjacent blade.
Furthermore, spray heads are also installed in the directional nozzles, and spray head outlets in the multiple groups of directional nozzles respectively correspond to the cutting teeth on the blades.
Further, the top surface of the directional nozzle is lower than the lower edge of the tooth hole of the cutting tooth.
Furthermore, one end of the directional nozzle is in a closed tubular shape, and the closed end of the directional nozzle is provided with a spray hole corresponding to the cutting teeth.
Furthermore, the inclination of the spray holes is 10-170 degrees.
Furthermore, a conventional nozzle is arranged in a chip removal groove between every two adjacent blades.
The beneficial effect of the invention is that,
in the drilling process, the slurry sprayed from the directional nozzle is directionally sprayed to the tooth tip part of the cutting tooth for cutting rocks, so that the cutting tooth is rapidly cooled and cooled, the cutting tooth is prevented from being thermally damaged due to cutting heat, the performance of the cutting tooth is greatly improved, the service life of a drill bit is prolonged, the footage of the drill bit is improved, and rock debris generated by cutting of the cutting tooth can be removed through the slurry sprayed from the directional nozzle, so that the rock debris cannot be adhered to the cutting tooth, and the drill bit is prevented from being covered with mud; meanwhile, the mud sprayed by the directional nozzles has high flow speed and high pressure, and can assist the cutting teeth to break rock and improve the rock breaking efficiency of the drill bit.
Drawings
FIG. 1 is a block diagram of a directional jet cooled PDC bit provided by the present invention;
FIG. 2 is a top view of a directional jet cooled PDC bit provided by the present invention;
fig. 3 is a structural view of the head.
Reference numbers and corresponding part names in the drawings:
1. the drill bit comprises a drill bit body, 2, blades, 3, cutting teeth, 4, a spray head, 5, a boss, 6, a directional nozzle, 7, a spray hole, 8 and a conventional nozzle.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
As shown in fig. 1 and 2, the directional jet cooling PDC drill bit provided by the invention comprises a drill bit body 1 and a plurality of blades 2, wherein the blades 2 are arranged at intervals along the circumference of the drill bit body 1, the lower end of each blade (2) is provided with a gauge protection structure, a plurality of groups of cutting teeth 3 are distributed on each blade 2, the plurality of groups of cutting teeth 3 are arranged at intervals along the width direction of the blade 2, the plurality of cutting teeth 3 in each group of cutting teeth 3 are uniformly arranged at intervals along the axial direction of the blade 2, and one group of cutting teeth 3 is positioned on the edge of the cutting direction of the blade 2, so that the cutting efficiency of the drill bit is higher.
The drill bit main body 1 is also provided with a plurality of groups of directional nozzles 6, and the inlet end of each group of directional nozzles 6 is communicated with the central water hole on the drill bit main body 1, so that the independent design of inlet channels of the directional nozzles 6 is not needed; the number of the groups of the directional nozzles 6 is equal to the number of the blades 2, so that each blade 2 corresponds to one group of the directional nozzles 6, and each group of directional nozzles 6 corresponds to the cutting teeth 3 on the corresponding blade 2, so that the slurry directionally sprayed out by the directional nozzles 6 can be directly and accurately sprayed to the tooth tips of the cutting teeth 3 cutting the rock, the cutting teeth 3 can be instantaneously cooled while cutting the rock, the performance of the cutting teeth 3 is greatly improved, the service life of the drill bit is prolonged, the footage of a single drill bit is improved, the aperture of the directional nozzle 6 is smaller than the original nozzle aperture on the drill bit main body 1, so that the speed of the slurry sprayed out through the directional nozzle 6 is higher, the pressure is higher, the slurry sprayed out through the directional nozzle 6 can also remove rock debris generated by cutting the cutting teeth 3, the rock debris is prevented from being adhered to the cutting teeth 3, and the drill bit is prevented from being covered with mud; meanwhile, the mud sprayed by the directional nozzles 6 can also assist the cutting teeth 3 in rock breaking, and the rock breaking efficiency of the drill bit is improved.
Each group of directional nozzles 6 in the directional nozzles 6 are multiple, the arrangement direction of the directional nozzles 6 in each group of directional nozzles 6 is consistent with the arrangement direction of the cutting teeth 3 on the blade 2, and the outlets of the directional nozzles 6 in each group of directional nozzles 6 correspond to the cutting teeth 3 on the same blade 2 together, so that the slurry sprayed by the directional nozzles 6 on the same blade 2 can be cooled down quickly, and the quality of a drill bit and the drilling efficiency are ensured.
The side wall of the blade 2 is also provided with a boss 5, the outer side wall of the boss 5 is inclined, namely the width of the boss 5 is gradually increased from the root of the blade 2 to the crown of the blade 2, the boss 5 and the drill bit body 1 are of an integral structure, and the height of the boss 5 is slightly lower than the lower edge of the tooth hole of the cutting tooth 3 of the blade 2, so that the boss 5 does not influence the drilling of the drill bit in the drilling process of the drill bit, and the drilling quality of the drill bit is guaranteed; the same group of directional nozzles 6 are located on the boss 5, so that the distance between the outlet of the directional nozzle 6 and the cutting teeth 3 is smaller, the slurry sprayed out through the directional nozzle 6 is more concentrated, the slurry speed at the spraying position of the directional nozzle 6 is higher, the effect of the slurry sprayed out by the directional nozzle 6 on the cutting teeth 3 is better, and the cooling effect of the cutting teeth 3 is better.
The directional nozzle 6 can also be positioned in a chip groove between two adjacent blades 2, at the moment, although the distance between the outlet of the directional nozzle 6 and the cutting teeth 3 is increased, the slurry directionally sprayed by the directional nozzle 6 is more dispersed, so that the slurry sprayed by one spray nozzle can simultaneously act on a plurality of cutting teeth 3, the number of the spray nozzles can be reduced, the acting force of the slurry on the cutting teeth 3 is relatively reduced, and the cooling efficiency of the cutting teeth 3 is relatively reduced.
The directional nozzle 6 in the present invention can also be located on the flank of the adjacent blade 2, in which case the direction of the jet from the directional nozzle 6 is easier to control. The purpose of accurate injection can be realized, and the performance of the cutting teeth 3 on the blade 2 is ensured by cooling through slurry.
The outlet end of the directional nozzle 6 can be designed into an elliptic cone shape, the opening degree of the outlet end of the directional nozzle 6 is larger than the opening degree of the inlet end of the directional nozzle 6, so that the outlet end of the directional nozzle 6 is flat, the slurry sprayed out through the directional nozzle 6 is fan-shaped, the slurry sprayed out through one directional nozzle 6 can simultaneously cover a plurality of cutting teeth 3, the coverage range of the slurry is wider, and the number of the directional nozzles 6 can be correspondingly reduced.
In order to facilitate the processing of the directional nozzle 6, the spray head 4 can be directly installed in the directional nozzle 6, the spray head 4 is welded in the directional nozzle 6, the outlet of the spray head 4 corresponds to the tooth tip of the cutting tooth 3, so that the drill bit only needs to be provided with the directional nozzle 6 on the drill bit main body 1 during the processing, then the installation position of the spray head 4 is adjusted, and finally the spray head 4 is welded in the directional nozzle 6; simultaneously, in order to prevent the tip department of shower nozzle 4 installation back spray nozzle in directional nozzle 6 from producing the vortex, can set up the step in directional nozzle 6's exit, with shower nozzle 4 welded fastening back, 4 inner walls of shower nozzle and the 6 inner walls parallel and level of directional nozzle make mud be in the advection state when passing through, avoid the vortex that 4 tip of shower nozzle produced to cause the hindrance to mud jet velocity, make the speed of the mud that erupts more stable.
In order to avoid the influence on the drilling of the drill bit due to the overhigh spray head 4, the top surface of the directional nozzle 6 or the top surface of the spray head 4 is lower than the lower edge of the tooth hole of the cutting tooth, so that the service lives of the directional nozzle 6 and the spray head 4 are ensured, and the drilling of the drill bit is ensured.
The spray head 4 provided by the invention is tubular with one closed end, the open end of the spray head 4 is arranged in the directional nozzle 6, the closed end of the spray head 4 faces the cutting teeth 3, the closed end of the spray head 4 is provided with the spray holes 7 corresponding to the cutting teeth 3, and the spray head 4 with the spray holes 8 with different inclination angles can meet the directional spray requirements of the cutting teeth at different positions, so that the drill bit is simpler to process.
As shown in fig. 3, the top of the inner wall of the nozzle 4 is conical, the taper of the inner wall is consistent with the inclination of the nozzle hole 7, so that slurry can flow into the nozzle 4 and flow into the nozzle hole 7 more smoothly, the eddy generated by the slurry in the spraying process is reduced, the energy of the slurry in the spraying process is reduced, the acting force of the slurry sprayed on the cutting teeth 3 is more stable, the cooling effect of the cutting teeth 3 is ensured, and the cleaning and breaking effects on the rock debris around the cutting teeth 3 are better.
The inclination of the spray hole 7 is 10-170 degrees, and the specific inclination of the spray hole 7 can be adjusted according to the installation direction of the spray head 4 and the outlet direction of the directional nozzle 6, so that the spray hole 7 is ensured to correspond to the tooth tip of the cutting teeth 3 on the blade 2; meanwhile, a conventional nozzle 8 is arranged in a chip groove between two adjacent blades 2.
The directional nozzle 6 in the invention can be a through hole arranged on the drill bit body directly; meanwhile, the cutting efficiency of the cutting teeth 3 at the profile of the blade 2 is higher in the drilling process of the drill bit, namely, the slurry sprayed out through the directional nozzle 6 is mainly used for cooling the cutting teeth 3 at the profile of the blade 2, and when the cutting teeth 3 are cooled, the slurry sprayed out through the directional nozzle 6 overflows to the crown of the blade 2, so that the rest cutting teeth 3 on the blade 2 can be cooled.
The invention can completely meet the rotating speed of the high-speed screw drilling tool and the turbine drilling tool, so that the drill bit provided by the invention can be directly used on the high-speed screw drilling tool and the turbine drilling tool, and the service life of the drill bit is ensured.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The PDC drill bit with the directional jet cooling function is characterized by comprising a drill bit main body (1) and a plurality of blades (2), wherein the lower end of each blade (2) is provided with a gauge protection structure, and each blade (2) is provided with a cutting tooth (3); the drill bit main body (1) is further provided with a plurality of groups of directional nozzles (6), and outlets of each group of directional nozzles (6) correspond to the cutting teeth (3) on each blade (2) respectively.
2. A directional jet cooled PDC bit according to claim 1, wherein the number of directional nozzles (6) in each set of directional nozzles (6) is plural, and outlets of the plural directional nozzles (6) collectively correspond to tips of the plural cutting teeth (3) on the blade (2).
3. The PDC bit of claim 1 or 2, wherein the rake face of the blade (2) is further provided with a boss (5), and the same set of directional nozzles (6) are located on the boss (5).
4. A directional jet cooled PDC bit according to claim 1 or 2, wherein the directional nozzles (6) are located in junk slots between two adjacent blades (2).
5. A directional jet cooled PDC bit according to claim 1 or 2, wherein the directional nozzles (6) are located on the flank of adjacent blades (2).
6. The PDC bit of claim 1, wherein the directional jet cooling nozzles (6) are further provided with nozzles (4), and outlets of the nozzles (4) in the plurality of groups of directional nozzles (6) respectively correspond to the cutting teeth (3) on each blade (2).
7. A directional jet cooling PDC drill bit according to claim 7, characterized in that the top surface of the nozzle tip (4) is lower than the perforation lower edge of the cutting tooth (3).
8. The PDC drill bit with the directional jet cooling function as in claim 7 or 8, wherein the directional nozzle (6) is tubular with one closed end, and the closed end of the directional nozzle (6) is provided with a jet hole (7) corresponding to the cutting tooth (3).
9. The directional jet cooling PDC drill bit of claim 9, wherein the inclination of the nozzle holes (7) is 10 ° to 170 °.
10. A directional jet cooling PDC drill bit according to claim 1, wherein a conventional nozzle (8) is further provided in a chip flute between adjacent two of the blades (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011594389.9A CN112681980B (en) | 2020-12-29 | 2020-12-29 | Directional jet cooling PDC drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011594389.9A CN112681980B (en) | 2020-12-29 | 2020-12-29 | Directional jet cooling PDC drill bit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112681980A true CN112681980A (en) | 2021-04-20 |
| CN112681980B CN112681980B (en) | 2023-06-16 |
Family
ID=75455246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011594389.9A Active CN112681980B (en) | 2020-12-29 | 2020-12-29 | Directional jet cooling PDC drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112681980B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201420504Y (en) * | 2009-04-24 | 2010-03-10 | 吴宗明 | Orientation nozzle for oil drill bit |
| CN203097721U (en) * | 2012-12-18 | 2013-07-31 | 中国石油集团渤海石油装备制造有限公司 | High-energy percussion rock-breaking PDC (polycrystalline diamond compact) drill bit |
| CN104763338A (en) * | 2015-03-05 | 2015-07-08 | 成都理工大学 | Hole expanding device, pull-back hole expanding assembly and hole expanding drilling method thereof |
| CN208168805U (en) * | 2018-05-10 | 2018-11-30 | 西迪技术股份有限公司 | Bit nozzle and drill bit |
| CN110107227A (en) * | 2019-04-28 | 2019-08-09 | 中国石油集团长城钻探工程有限公司 | A kind of diamond bit with efficient outlet hole structure |
| CN111322015A (en) * | 2020-04-23 | 2020-06-23 | 成都迪普金刚石钻头有限责任公司 | PDC drill bit adopting high-low pressure combined nozzle |
| CN211397463U (en) * | 2019-10-22 | 2020-09-01 | 西南石油大学 | Diamond bit with sinking surface on blade |
-
2020
- 2020-12-29 CN CN202011594389.9A patent/CN112681980B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201420504Y (en) * | 2009-04-24 | 2010-03-10 | 吴宗明 | Orientation nozzle for oil drill bit |
| CN203097721U (en) * | 2012-12-18 | 2013-07-31 | 中国石油集团渤海石油装备制造有限公司 | High-energy percussion rock-breaking PDC (polycrystalline diamond compact) drill bit |
| CN104763338A (en) * | 2015-03-05 | 2015-07-08 | 成都理工大学 | Hole expanding device, pull-back hole expanding assembly and hole expanding drilling method thereof |
| CN208168805U (en) * | 2018-05-10 | 2018-11-30 | 西迪技术股份有限公司 | Bit nozzle and drill bit |
| CN110107227A (en) * | 2019-04-28 | 2019-08-09 | 中国石油集团长城钻探工程有限公司 | A kind of diamond bit with efficient outlet hole structure |
| CN211397463U (en) * | 2019-10-22 | 2020-09-01 | 西南石油大学 | Diamond bit with sinking surface on blade |
| CN111322015A (en) * | 2020-04-23 | 2020-06-23 | 成都迪普金刚石钻头有限责任公司 | PDC drill bit adopting high-low pressure combined nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112681980B (en) | 2023-06-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5794725A (en) | Drill bits with enhanced hydraulic flow characteristics | |
| US9677343B2 (en) | Tracking shearing cutters on a fixed bladed drill bit with pointed cutting elements | |
| US6763902B2 (en) | Rockbit with attachable device for improved cone cleaning | |
| US4733734A (en) | Method and improvement to drilling tools comprising water passages providing great efficiency in cleaning the cutting face | |
| US2776115A (en) | Drill bit | |
| CN108533183B (en) | PDC drill bit with passive rotary nozzle arranged on blade | |
| EP0742342A2 (en) | Rotary drill bit | |
| US3414070A (en) | Jet drilling bit | |
| CN214303702U (en) | Directional jetting cooling PDC drill bit | |
| CN110067516B (en) | Quick impact-scraping and cutting combined rock breaking PDC drill bit | |
| EP0171915B1 (en) | Improvements in or relating to rotary drill bits | |
| EP0624707A2 (en) | Nozzle arrangement for drag bit | |
| US4077482A (en) | Three cone rock bit | |
| CN112681980A (en) | Directional jetting cooling PDC drill bit | |
| CN210049832U (en) | Diamond drill bit with rear water spray hole | |
| CN112282657B (en) | Mixed structure gas drilling bit based on preferential rock breaking in easily-broken area | |
| US4738320A (en) | Method and improvement to drilling tools allowing great efficiency in cleaning the cutting face | |
| US3467211A (en) | Drill bit for hydraulic jet drilling of wells | |
| CN211397463U (en) | Diamond bit with sinking surface on blade | |
| EP0225082A2 (en) | Improvements in or relating to rotary drill bits | |
| CN212105759U (en) | Retreat platform type shoulder strengthening PDC drill bit | |
| CN208816050U (en) | A kind of diamond bit for total cost management | |
| CN210768608U (en) | PDC drill bit with tapered water hole | |
| JPS63134782A (en) | Compact rotary drill bit equipped with large cutter supplying water stream having directionality to each cutter | |
| CN210798852U (en) | PDC drill bit with back row tooth water hole |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |