CN112814575B - Gas drilling drill bit capable of preventing rock burst and drill sticking - Google Patents
Gas drilling drill bit capable of preventing rock burst and drill sticking Download PDFInfo
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- CN112814575B CN112814575B CN202110271425.6A CN202110271425A CN112814575B CN 112814575 B CN112814575 B CN 112814575B CN 202110271425 A CN202110271425 A CN 202110271425A CN 112814575 B CN112814575 B CN 112814575B
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- 239000011435 rock Substances 0.000 title claims abstract description 112
- 238000005553 drilling Methods 0.000 title claims abstract description 45
- 230000036346 tooth eruption Effects 0.000 claims abstract description 18
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 4
- 238000007790 scraping Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
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- 238000000034 method Methods 0.000 abstract description 6
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- 230000000694 effects Effects 0.000 description 6
- 239000002245 particle Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
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- 230000015572 biosynthetic process Effects 0.000 description 2
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- 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
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
- E21B10/55—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
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- 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
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/61—Drill bits characterised by conduits or nozzles for drilling fluids characterised by the nozzle structure
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- 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
- E21B12/00—Accessories for drilling tools
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Abstract
The invention provides a gas drilling bit capable of preventing rock burst and drill sticking, and relates to the technical field of oil and gas exploration. This gas drilling drill bit of anti-rock burst and anti-sticking drill includes screw thread top connection (1) and installs drill bit body (6) on screw thread top connection (1), is equipped with a plurality of main wing of a knife (7) on drill bit body (6), and its bottom still is equipped with a plurality of vice wing of a knife (8), main wing of a knife (7) keep away from screw thread top connection (1) one end with all be equipped with a plurality of PDC cutting teeth (9) on vice wing of a knife (8), main wing of a knife (7) are close to screw thread top connection (1) and serve and still be equipped with a plurality of cutting teeth of cutting a button down, and main wing of a knife (7) side is equipped with arc wing inclined plane (12) that have certain angle and can scrape arc recess (4) of cutting naturally. The invention can ensure that the drill bit can continuously grind large rock blocks when encountering well wall rock burst or well wall collapse in the drilling process, discharge rock debris and prevent drill sticking.
Description
Technical Field
The invention relates to the technical field of oil and gas exploration, in particular to a gas drilling bit capable of preventing rock burst and drill sticking.
Background
The drill bit is an important tool which is directly contacted with rocks and can break the rocks through cutting, impacting and other actions in the drilling operation process, the ground temperature, the formation pore pressure and the ground stress are increased along with the deepening of the mining depth, the geological structure is more and more complex, the underground complex conditions are more and more, and the sudden borehole wall instability is one of the potential safety hazards. The collapse of the well wall is a condition of instability of the well wall in the drilling construction process, and has great influence on the drilling engineering. Relevant data show that the world oil industry loses more than $ 6 billion each year due to borehole wall instability. The well drilling construction process has a very complicated and changeable geological structure, the instability of the well wall can induce various underground accidents, the safety and the efficiency of the well drilling engineering are seriously damaged, the worldwide problem in the well drilling industry is also solved, a large number of attacks and customs are carried out at home and abroad in the aspect, and a certain effect is achieved. Rock burst (rockburst) is another special phenomenon of borehole wall instability in underground engineering, and is a dynamic mechanical phenomenon that under the disturbance of excavation activity, strain energy stored in a rock body in a high-stress or extreme balance state is released instantly, and surrounding rocks are suddenly and violently ejected, thrown and ejected to an excavation space. When the gas drilling well encounters a large-size crack (the width is more than 500mm) or a grouped large-size crack network and a certain distance exists between the crack and the real-time well bottom, high-pressure gas in the crack cannot obviously release pressure through a rock wall due to the extremely low permeability of the rock wall between the crack and a shaft, so that the trapping high pressure in the crack is caused; when the real-time drilling bottom hole is close to the crack enough, the strength of the rock wall between the crack and the shaft is not enough to resist the destructive force formed by high pressure difference, the rock wall is cracked and broken instantly, a large amount of collapse fragments and released high-pressure gas are sprayed into the well, and the phenomenon is called as the sudden well wall instability phenomenon of gas drilling. The gas-solid multiphase flow can cause erosion and leakage of a ground sand discharge pipeline, so that normal drilling is interrupted, and the exploration and development period is influenced. Rock debris after rock burst returns upwards and enters a drill bit water hole to enter a drill stem to block the drill bit water hole, the upward returning large rock debris with larger gravity is quickly sunk into a well bottom, the well bottom and the upper part of the well bottom are blocked quickly along with the increase of the accumulation of the large rock debris, the air flow pumped in the drill stem cannot circulate, the well bottom is seriously blocked, rock burst occurs in a well, a large amount of debris is formed by the instantaneously exploded rock, the flow passages of the conventional drill bit are more, the aperture of the flow passages is smaller, a large amount of debris inevitably enters the flow passages of the drill bit to quickly block the inner holes of the flow passages, after the rescue is ineffective, the large rock debris returning in the annular space of the drill stem in the upward returning process is larger in gravity and quickly sunk into the large rock debris, the well bottom and the upper part of the well bottom are blocked quickly along with the increase of the accumulation of the large rock debris, namely, the well hole and the annular space are blocked, the pressure of the large rock debris is high, and the rock debris fly everywhere, the drilling bit is flushed to the ground more than needed, the drilling bit falls into the annulus to block the drill bit, and if the bottom of the well collapses, a special drill bit for releasing the block is needed, so that the problem of blockage of the drill bit and the annulus by high-discharge rock debris is solved by finding a special gas drill bit for releasing the block, and the drill bits for gas drilling at present are as follows: 1. patent CN110374517A discloses a novel anti-blocking PDC drill bit, wherein an inner cone and an outer cone both have a certain height, the profile of a crown part is improved, a composite sheet of cutting teeth of the PDC drill bit is optimized, the PDC drill bit adopts an even abrasion design principle, a side turning angle of the cutting teeth of the PDC drill bit adopts a design which changes along with a spiral line angle, the drill bit mainly aims at the use of conventional gas drilling and mainly reduces the abrasion of the drill bit and enhances the use function of the drill bit, but 6 replaceable nozzles are arranged on the outlet of a flow passage of the PDC drill bit and are asymmetrically arranged, and the novel anti-blocking PDC drill bit cannot provide a reliable anti-blocking effect for a large drilling cutting rock block; 2. patent CN201420561870.1 discloses a gas drilling drill bit and gas drilling system, the inside gas storage chamber that is formed with of drill bit, the one end of drill bit body is fixed and is provided with two at least toothholders, rotatably is provided with the cone on the toothholder, is equipped with central nozzle hole in the bottom center department that the drill bit body was equipped with the toothholder, central nozzle hole intercommunication extremely the gas storage chamber. The drill bit body is provided with the bottom end of the tooth holder, and a side nozzle hole is further formed between two adjacent tooth holders. Through the gas drilling drill bit and the gas drilling system that this patent provided, spout the air current simultaneously from center nozzle hole and side nozzle hole, eliminate the detritus of the delay of the central point department of putting of drill bit, thoroughly eliminate the detritus, avoid causing the detritus to subside and accumulational phenomenon to avoided causing the condition of sticking of tool, be favorable to driling. The roller bit can effectively remove rock debris in conventional gas drilling, but a large amount of high-speed rock debris generated by rock burst at the bottom of a well or well wall collapse is difficult to remove smoothly, the aperture of the roller bit nozzle of the patent is still equivalent to that of an inner hole of a conventional nozzle, the inner hole is small in short, large rock debris generated by rock burst and well wall collapse is not easy to remove, and the large rock debris entering the inner hole of the roller bit can not be removed through air flow with the small aperture; 3. patent CN201520956036.7 discloses a device for preparing rock debris for the primary rock breaking of a gas drilling bit, wherein gas can enter from a gas injection port, flow through a flow channel and flow out from a gas outlet, impact and cool a roller bit, and take away the rock debris from the bottom of the roller bit in time; the motor can provide kinetic energy for the rotation of the drill rod, and the roller bit is driven to rotate by the drill rod; the conical bottom surface prevents the accumulation of large debris particles and the separator separates gas from debris particles. The motor is started, the weight adding block is lowered through the winch, the rotary roller bit is enabled to be in contact with the rock block to start rock breaking, broken rocks leave the bottom of the roller bit under the impact of airflow and move along with the airflow and finally enter the separator to be separated, and therefore rock debris of the gas drilling bit for breaking the rock for the first time is obtained.
Disclosure of Invention
The invention aims to provide a gas drilling bit capable of preventing rock burst and sticking, wherein the drill rod is internally prevented from being blocked, even if lower rock debris returns to a water hole of the drill bit, large-particle rock debris blocked at the lower part of the drill bit can be washed away under the action of pumped gas pressure, namely, the lower part of the drill bit can form a high-pressure-holding effect; when the drill bit is clamped by rock debris, large rocks are crushed and fall down along the groove by continuously grinding the inverted-reaming cutting teeth and the spherical hard alloy steel on the inclined plane of the arc-shaped blade, and then the crushed rocks flow back out of a well mouth through airflow and are gradually unfreezed; the drill bit has the advantages that upward-returning rock debris is effectively discharged, the debris removal and cooling efficiency is improved, the blockage can be still removed even if a water hole of the drill bit is blocked, and the technical problem that the existing common drilling drill bit is difficult to smoothly remove rock burst at the bottom of a well or collapse of a well wall to generate a large amount of high-speed rock debris is solved. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention adopts the following technical scheme:
a gas drilling bit that is rock burst and stuck resistant comprising a threaded top sub and a bit body mounted on the threaded top sub, wherein:
the drill bit body is provided with a plurality of main blades, and the bottom of the drill bit body is also provided with a plurality of auxiliary blades;
the main blade and the auxiliary blades are uniformly distributed on the bit body at intervals;
a plurality of PDC cutting teeth are arranged at one end of the main blade far away from the upper thread joint and on the auxiliary blade;
a plurality of back reaming cutting teeth are further arranged at one end, close to the upper thread joint, of the main blade;
the side surface of the main blade is provided with an arc blade inclined plane with a certain angle and an arc groove capable of naturally scraping;
a plurality of hard alloy teeth are arranged on the inclined plane of the arc-shaped blade;
a gas flow channel and a flow channel center are arranged in the drill bit body;
the center of the flow channel is arranged at the bottom of the gas flow channel, and the bottom of the center of the flow channel is also provided with a plurality of spiral drainage channels which are beneficial to rock breaking;
and the tail end of each spiral drainage channel is provided with a hard alloy nozzle.
Optionally or preferably, the number of the main blades and the number of the auxiliary blades are three, and the main blades and the auxiliary blades are uniformly distributed on the bit body at intervals of 60 degrees along the circumferential direction of the bit body.
Optionally or preferably, the carbide teeth are spherical structures and are distributed on the carbide teeth in an arc shape according to the angle of the inclined plane of the arc-shaped blade.
Optionally or preferably, a hoisting groove is arranged on the upper thread joint.
Optionally or preferably, the side surface of the main blade and the inclined surface of the arc-shaped blade form an included angle of 60-75 degrees.
Optionally or preferably, a groove for facilitating falling of rock debris is further arranged between the main blade and the arc-shaped blade inclined plane.
The invention has the following beneficial effects:
1. the anti-blocking drill rod can prevent blocking in the drill rod, when lower rock debris returns to a drill bit water hole, large-particle rock debris blocked at the lower part of the drill bit can be flushed away under the action of pumped gas pressure, namely, the lower part of the drill bit can form a high-pressure suppressing effect, three auxiliary blades are designed at the bottom of the drill bit body and can continuously grind the rock debris, the ground rock debris enters an annular space after returning upwards and cannot fall to the bottom of a well, the diameter of a water hole flow channel of an inner hole of the drill bit is equal to the diameter of an inner hole of a drill collar, and the flow channel center and three spiral drainage channels are arranged, so that the problem of blocking of a single water hole can be effectively prevented, the upward-returning rock debris can be effectively discharged, the chip removal and tooth cooling efficiency can be improved, and even when the water hole of the drill bit is blocked, the blocking can still be removed.
2. The drill bit body is internally provided with a flow channel center and three spiral drainage channels, so that the function of the conventional PDC drill bit is met, the drill bit is favorable for rotating to break rock, and meanwhile, the gas flow channel of the drill bit is not easy to block when rock burst and complex well wall collapse accidents happen underground, or even if the rock burst and complex well wall collapse accidents happen to block the flow channel of the drill bit or the complex well wall collapse causes the complex underground accidents, the drill bit can also apply high-pressure gas to remove the blockage problem of the flow channel of the drill bit through the ground, and the gas circulation at the bottom of the well is established.
3. The main blades of the PDC drill bit are distributed in an angle of 120 degrees, arc-shaped blade inclined planes are arranged laterally, hard alloy teeth are arranged, PDC cutting teeth are arranged on the blade main body, and back-reaming cutting teeth are arranged at the rear end of the blade main body and are used for drilling cutting and drilling clamping treatment; each blade is not overlapped in a crossed mode, a flow channel is formed naturally in the middle of each blade, a groove is formed between the main blade and the inclined plane of each blade, the vertical unobstructed space is larger, rock debris can fall down conveniently when a drill is stuck in a processing mode, reverse drilling is achieved, and therefore the drill bit outer circle has enough space for discharging upward-returning rock debris.
4. This drill bit extends the extension and installs the cutting tooth of back reaming, and the tooth of back reaming can carry out the return drilling while rotatory, and the rock of sticking the brill is broken again for the continuous whereabouts of ground detritus carries out reverse unblock, and the drill bit body has carried out the extension relative conventional drill bit, can make the drill bit creep into more stably, safe and reliable.
5. The tooth layout of each blade of the drill bit extends reversely to the drill bit, so that the drill bit has an upward rock breaking function when reversely drilling, and meanwhile, the blade inclined plane is provided with an arc-shaped groove, so that the drill bit has a natural scraping function; the overall length of the drill bit is increased, the axial stability of the drill bit is improved, the drill bit cannot shake, the inclined surface of the reverse blade can be more gentle, the arrangement of spherical hard alloy steel teeth is more reasonable, and more arc-shaped grooves are formed.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view (top view) of the present invention;
FIG. 3 is a schematic diagram of the operation of the drill chuck for releasing the chuck of the present invention;
FIG. 4 is a schematic diagram illustrating the operation of blockage removal according to the present invention;
in the figure: 1-screwing up a joint; 2-hoisting the groove; 3-back reaming cutting teeth; 4-arc groove; 5-spherical cemented carbide teeth; 6-a bit body; 7-main blade; 8-auxiliary blade; 9-PDC cutters; 10-a groove; 11-a nozzle; 12-arc blade bevel; 13-well wall; 14-a drill collar; 15-bottom hole; 16-the formation; 17-upward return of annular debris; 18-annulus; 19-a gas flow channel; 20-flow channel center; 21-a spiral drainage channel; and 22, returning rock debris on the flow channel.
Detailed Description
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following.
As shown in fig. 1-4:
the invention provides a gas drilling bit capable of preventing rock burst and sticking, which comprises a thread upper joint 1 and a bit body 6 arranged on the thread upper joint 1; wherein:
a plurality of main blades 7 are arranged on the bit body 6, and a plurality of auxiliary blades 8 are arranged at the bottom of the bit body;
the main blades 7 and the auxiliary blades 8 are uniformly distributed on the bit body 6 at intervals;
a plurality of PDC cutting teeth 9 are arranged at one end of the main blade 7, which is far away from the upper thread joint 1, and on the auxiliary blade 8;
a plurality of back reaming cutting teeth 3 are further arranged at one end, close to the upper thread joint 1, of the main blade 7;
the side surface of the main blade 7 is provided with an arc-shaped blade inclined plane 12 with a certain angle and an arc-shaped groove 4 capable of naturally scraping;
a plurality of hard alloy teeth 5 are arranged on the arc blade inclined plane 12;
a gas flow passage 19 and a flow passage center 20 are arranged in the bit body 6;
the flow channel center 20 is arranged at the bottom of the gas flow channel 19, and a plurality of spiral drainage channels 21 which are helpful for rock breaking are further arranged at the bottom of the flow channel center 20;
the tail end of each spiral drainage channel 21 is provided with a hard alloy nozzle 11.
As an alternative embodiment, the number of the main blades 7 and the auxiliary blades 8 is three, and the main blades and the auxiliary blades are uniformly distributed on the bit body 6 at intervals of 60 ° along the circumferential direction of the bit body 6.
In an alternative embodiment, the cemented carbide teeth 5 are spherical and distributed in an arc shape according to the angle of the arc blade bevel 12.
As an optional implementation mode, the upper thread connector 1 is provided with a hoisting groove 2, so that a drill bit can be conveniently fixed for hoisting.
As an optional implementation mode, the side face of the main blade 7 and the arc-shaped blade inclined plane 12 form an included angle of 60-75 degrees, so that the PDC cutting teeth 9 break rock smooth transition through the spherical hard alloy teeth 5 on the arc-shaped blade inclined plane 12, and the abrasion of the PDC cutting teeth 9 is reduced.
As an optional embodiment, a groove 10 for facilitating falling of rock debris is further formed between the main blade 7 and the arc-shaped blade inclined plane 12, so that the space in the vertical direction is enlarged, and the rock debris can fall conveniently in the unfreezing process.
As an alternative embodiment, the gas flow passage 19 of the bit body 6 has an inner bore diameter comparable to the inner bore diameter of the drill collar 14.
As an alternative embodiment, the end of the main blade 7 away from the upper thread joint 1 is provided with a plurality of PDC cutting teeth 9, and the end close to the upper thread joint 1 is also provided with a plurality of back-reaming cutting teeth 3 for drilling cutting and drilling clamping.
As an optional implementation mode, the main blades 7 and the auxiliary blades 8 are uniformly distributed on the bit body 6 at intervals, each blade is not overlapped in a crossed manner, a flow channel is formed naturally in the middle of each blade, and a groove 10 is formed between each main blade 7 and each arc-shaped blade inclined surface 12, so that the vertical unobstructed space is larger, rock debris can conveniently fall downwards during drill clamping treatment, reverse drilling is realized, and therefore, the outer circle of the drill bit has enough space for discharging upward-returning rock debris.
As an alternative embodiment, the threaded upper joint 1 and the drill body 6 are fixedly connected through welding after being matched with each other through threads, and the threaded upper joint 1 is in threaded connection with the drill collar 14.
As an alternative embodiment, the counter-blade 8 at the bottom of the bit body 6 continuously grinds large rock blocks generated by a stratum 16 due to rock burst at the bottom of a well 15 or collapse of a well wall 13 to form smaller upward-returning annular rock debris 17 and upward-returning rock debris 22 of a flow channel, if the upward-returning rock debris 22 of the flow channel is smaller, after the impact of high-pressure air flow pumped in the upper part, the pressure P0 of the high-pressure air flow is greater than the pressure P1 and P2 of the rock debris returned on the bottom of the well 15, the upward-returning rock debris 22 entering the flow channel is forced to reversely enter the annular space 18 and then returns to the ground, if the upward-returning rock debris 22 of the flow channel is larger, the high-pressure air flow is temporarily accumulated at the outlet of a gas flow channel, and because the hole diameter of a central inner hole of the flow channel is larger, the pressure P0 of the pumped high-pressure air flow is continuously increased and is far greater than the pressure P1 and P2 of the rock debris returned on the bottom of the well 15 and the gravity of the outlet of the gas flow channel, finally, the pressure P0 of the high-pressure airflow pumped in from the upper part is enough to lead the blocked rock debris to rush out of the outlet, and as the auxiliary blades 8 continuously grind the large rock mass generated by rock burst at the well bottom 15, the large rock debris mass is bound to be processed into small rock debris which is then returned to the annular space 18 and then returned to the well head.
Claims (3)
1. The utility model provides a gas drilling drill bit of anti-rock burst and anti-sticking brill, includes threaded top connection (1) and installs bit body (6) on threaded top connection (1), its characterized in that:
a plurality of main blades (7) are arranged on the bit body (6) and distributed in an angle of 120 degrees, and a plurality of auxiliary blades (8) are arranged at the bottom of the bit body;
the main blades (7) and the auxiliary blades (8) are uniformly distributed on the bit body (6) at intervals;
a plurality of PDC cutting teeth (9) are arranged at one end of the main blade (7) far away from the upper thread joint (1) and on the auxiliary blade (8);
a plurality of back reaming cutting teeth (3) are further arranged at one end, close to the upper threaded joint (1), of the main blade (7);
the side surface of the main blade (7) is provided with an arc-shaped blade inclined plane (12) with a certain angle and an arc-shaped groove (4) capable of naturally scraping;
a plurality of hard alloy teeth (5) are arranged on the arc-shaped blade inclined plane (12);
a gas flow channel (19) and a flow channel center (20) are arranged in the bit body (6);
the flow channel center (20) is arranged at the bottom of the gas flow channel (19), and a plurality of spiral drainage channels (21) which are helpful for rock breaking are further arranged at the bottom of the flow channel center (20);
the tail end of each spiral drainage channel (21) is provided with a hard alloy nozzle (11);
the number of the main blades (7) and the number of the auxiliary blades (8) are three, and the main blades and the auxiliary blades are mutually and uniformly distributed on the bit body (6) at intervals of 60 degrees along the circumferential direction of the bit body (6);
the hard alloy teeth (5) are of spherical structures and are distributed on the arc-shaped blade wing inclined planes (12) in an arc shape;
the side surface of the main blade (7) and the arc blade inclined plane (12) form an included angle of 60-75 degrees;
the main blade (7) and the auxiliary blade (8) are uniformly distributed on the drill bit body (6) at intervals, each blade is not overlapped in a crossed mode, a flow channel is formed in the middle of each blade naturally, a groove (10) is formed between each main blade (7) and each arc-shaped blade inclined plane (12), so that the vertical unobstructed space is larger, rock debris can conveniently fall down when drilling is carried out, reverse drilling is achieved, and therefore sufficient space is reserved on the outer circle of the drill bit for discharging upward-returning rock debris;
the auxiliary blade (8) at the bottom of the bit body (6) continuously grinds large rock blocks generated by a stratum (16) due to rock burst at the bottom of a well bottom (15) or collapse of a well wall (13) to form smaller upward returning annular rock debris (17) and flow channel upward returning rock debris (22), if the flow channel upward returning rock debris (22) is smaller, after high-pressure airflow impact pumped in the upper part, the upward returning rock debris (22) entering the flow channel is forced to reversely enter the annular space (18) due to the fact that the pressure P0 of the high-pressure airflow is larger than the pressure P1 and P2 of the rock debris returned at the bottom of the well bottom (15), and then the rock debris returns to the ground, if the flow channel upward returning rock debris (22) is larger, the rock debris is temporarily accumulated at the outlet of the gas flow channel, and due to the larger hole diameter of the central inner hole of the flow channel, the pumped high-pressure airflow is blocked, so that the pressure P0 of the high-pressure airflow is continuously increased and is far larger than the pressure P1, 25, far larger, the pressure of the rock debris returned at the upper returning of the flow channel (15), P2 and the gravity of the rock debris gathered at the outlet of the gas flow channel, and the pressure P0 of the high-pressure airflow pumped in the upper part finally is enough to lead the blocked rock debris to rush out of the outlet, and the large rock debris block generated by the rock burst at the bottom of the well (15) is continuously ground along with the auxiliary blade (8), and the large rock debris block can be processed into small rock debris and returns to the annular space (18) to return to the wellhead.
2. The gas drilling bit of claim 1, wherein: and a hoisting groove (2) is arranged on the upper thread joint (1).
3. The gas drilling bit of claim 1, wherein: and a groove (10) convenient for rock debris to fall is further arranged between the main blade (7) and the arc-shaped blade inclined plane (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110271425.6A CN112814575B (en) | 2021-03-12 | 2021-03-12 | Gas drilling drill bit capable of preventing rock burst and drill sticking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110271425.6A CN112814575B (en) | 2021-03-12 | 2021-03-12 | Gas drilling drill bit capable of preventing rock burst and drill sticking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112814575A CN112814575A (en) | 2021-05-18 |
| CN112814575B true CN112814575B (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110271425.6A Active CN112814575B (en) | 2021-03-12 | 2021-03-12 | Gas drilling drill bit capable of preventing rock burst and drill sticking |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837568A (en) * | 2022-06-09 | 2022-08-02 | 常州智港智能装备有限公司 | PDC rotary cutting composite drill bit and construction method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204082017U (en) * | 2014-08-18 | 2015-01-07 | 中国石油集团长城钻探工程有限公司 | The long gauge negative pressure antiimpact PDC drill bit of a kind of ultradeep well |
| CN106050148A (en) * | 2016-07-29 | 2016-10-26 | 成都保瑞特钻头有限公司 | Novel PDC drill bit with stable function |
| CN205977105U (en) * | 2016-08-30 | 2017-02-22 | 武汉亿斯达工具有限公司 | Anti -sticking bores diamond bit |
| CN108952582A (en) * | 2018-08-28 | 2018-12-07 | 新疆贝肯能源工程股份有限公司 | PDC drill bit suitable for double pendulum speed-raising drilling tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US9115552B2 (en) * | 2010-12-15 | 2015-08-25 | Halliburton Energy Services, Inc. | PDC bits with mixed cutter blades |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204082017U (en) * | 2014-08-18 | 2015-01-07 | 中国石油集团长城钻探工程有限公司 | The long gauge negative pressure antiimpact PDC drill bit of a kind of ultradeep well |
| CN106050148A (en) * | 2016-07-29 | 2016-10-26 | 成都保瑞特钻头有限公司 | Novel PDC drill bit with stable function |
| CN205977105U (en) * | 2016-08-30 | 2017-02-22 | 武汉亿斯达工具有限公司 | Anti -sticking bores diamond bit |
| CN108952582A (en) * | 2018-08-28 | 2018-12-07 | 新疆贝肯能源工程股份有限公司 | PDC drill bit suitable for double pendulum speed-raising drilling tool |
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| CN112814575A (en) | 2021-05-18 |
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