CN111779453A - Combined reaming method and device - Google Patents
Combined reaming method and device Download PDFInfo
- Publication number
- CN111779453A CN111779453A CN202010743578.1A CN202010743578A CN111779453A CN 111779453 A CN111779453 A CN 111779453A CN 202010743578 A CN202010743578 A CN 202010743578A CN 111779453 A CN111779453 A CN 111779453A
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- China
- Prior art keywords
- reaming
- flexible
- chain
- combined
- bit
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
- E21B10/322—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools cutter shifted by fluid pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B17/22—Rods or pipes with helical structure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
Abstract
The invention relates to a combined reaming method and a combined reaming device in the technical field of coal mine drilling, which are used for flexibly and jointly reaming in a mode of combining hydraulic reaming and mechanical flexible reaming through a combined reaming device on the basis of common drilling. The device disclosed by the invention can be used for rapidly and efficiently reaming the coal mine gas extraction drill hole by adopting a mode of combining hydraulic cutting and flexible mechanical reaming, and is simple in structure, high in reliability, good in wear resistance and stability, convenient in drill withdrawal and suitable for popularization and application.
Description
Technical Field
The invention belongs to the technical field of coal mine drilling, and particularly relates to a combined reaming method and device.
Background
Before coal mine collection, a hole needs to be drilled for gas extraction, a hole needs to be drilled from a rock layer to a coal seam during drilling, and in order to save drilling cost and increase gas extraction efficiency, the hole needs to be reamed under the condition that the hole diameter of a rock layer drilling section is not changed, so that the surface area of an inner hole of the coal seam is enlarged, and the gas overflow efficiency is improved. The existing gas extraction drilling hole expanding device and method have the problems of low working efficiency, difficulty in drill withdrawal, low reliability and the like. Thus, there is a need for improvements in existing borehole reaming methods and apparatus.
Disclosure of Invention
In order to solve the technical problem, the invention provides a combined reaming method, which comprises the following steps:
1) drilling and positioning: measuring and setting out according to the coal seam condition to position the drilling hole;
2) drilling: firstly, drilling a common drill hole in a coal seam through a rock layer by using a common gas extraction drilling machine, stopping drilling after the depth of the common drill hole reaches a designed position, and withdrawing a common drill bit;
3) reaming: flexible combined reaming is carried out by adopting a mode of combining hydraulic reaming and mechanical flexible reaming;
31) hydraulic reaming is carried out by adopting a hydraulic cutting head provided with a high-pressure spray head along the radial direction;
32) flexible reaming bit is connected at the rear end of hydraulic power cutting head to flexible reamer bit of machinery, carries out the flexible reaming of machinery through flexible reamer bit, flexible reamer bit passes through the drilling rod drive of taking gear motor, be equipped with along radial getting rid of the chain or getting rid of the cable on the flexible reamer bit, wear to be equipped with high-pressure hose in getting rid of the chain or getting rid of the cable, high-pressure hose is linked together with the water under high pressure in the reamer bit, the one end that flexible reamer bit was kept away from to high-pressure hose is got rid of the chain or gets rid of the cable through the cooperation of high-pressure water jet, carries out the supplementary cutting.
Preferably, in the step 32), the working speed of the speed reducing motor is 500r/min, and the swinging chain or the swinging cable is unfolded by using the rotation inertia, so that the precision of the hole expanding size is ensured and the hole expanding efficiency is improved.
Preferably, the working pressure of the high-pressure water is 30MPa, so that a better hydraulic cutting effect is achieved.
As another aspect of the invention, the invention also provides a combined reaming device, comprising a drill stem, a hydraulic cutting head and a flexible reaming bit, one end of the drill rod is in transmission connection with the speed reducing motor, the other end of the drill rod is fixedly connected with the flexible expanding bit, the hydraulic cutting head is connected with one end of the flexible expanding bit far away from the drill rod, the flexible expanding bit and the hydraulic cutting head are internally provided with communicated high-pressure water channels, the outer circular surface of the hydraulic cutting head is radially provided with a plurality of high-pressure spray heads, and one end of the hydraulic cutting head far away from the flexible reamer bit is also connected with a tunneling drill bit, the flexible reamer bit comprises a reamer seat and a swinging chain or a swinging cable, the swinging chain or the swinging cable is made of high-strength wear-resistant metal materials, and a high-pressure hose penetrates through the swing chain or the swing cable, and a high-pressure water injection port is arranged at one end, far away from the reaming base, of the high-pressure hose. After this device got into the coal seam, through the multiplicable drilling depth of tunnelling drill bit, quick reaming when realizing boring deeply through water conservancy cutting head and flexible reamer bit cooperation operation, and the reaming is accomplished the back, through carrying out the pressure release to the high-pressure hose, can realize moving back the brill fast to effectively improved the work efficiency of reaming operation, improved reaming device's reliability simultaneously. The outer surfaces of the reaming seat and the drill rod are provided with spiral guide grooves, broken coal particles can be conveniently conveyed out of drilled holes in time during reaming, and reaming efficiency is guaranteed.
Preferably, the swinging chain is a mining high-strength round-link chain, the degree of freedom is high, and fatigue damage is not easy to occur.
Preferably, the high-pressure hose is an armored metal hose, so that the service life of the high-pressure hose is guaranteed.
Preferably, the high-strength wear-resistant metal material is 27SiMn material, so that the strength is high, the wear resistance is good, and the service life of the device is prolonged.
Preferentially, get rid of and be equipped with the diamond compact piece on chain or the cable of getting rid of, improve the wearability of getting rid of the chain or getting rid of the cable, be favorable to extension fixture's life.
Preferably, the reaming seat is provided with three rings of reaming assemblies along the axial interval, and every ring of reaming assembly at least comprises two flail chains or flail cables to guarantee the stability of flexible reamer bit operation, improve the reliability of device, guarantee reaming efficiency.
Preferably, the reaming radius of three rings of reaming subassemblies is 100mm, 200mm and 250mm respectively, get rid of the chain or get rid of the cable and be close to hydraulic cutting head more, the reaming radius is less, makes the device by the drilling direction of drill bit reaming step by step from the front to the back, makes every circle of reaming subassemblies all be in reasonable reaming radius, reduces the wearing and tearing of device, guarantees the reliability of device when improving reaming efficiency.
The present invention also includes other steps, devices or components that enable the normal use of the combined reaming method and device, all of which are conventional in the art, and further, the steps, devices or components not limited in this invention are conventional in the art.
According to the invention, common drill holes are drilled in a rock stratum and a coal seam through a common gas extraction drilling machine, after a common drill bit is withdrawn, a flexible hole expanding drill bit with a hydraulic cutting head is used for reaming, hydraulic jet is carried out by the hydraulic cutting head at the front end of the drill hole, so that the coal seam is looser, then the coal seam is mechanically thrown through a swinging chain or a swinging cable on the flexible hole expanding drill bit, the crushing of the coal seam is accelerated, a high-pressure hose is arranged in the swinging chain or the swinging cable in a penetrating mode, the expansion and stretching effects of high-pressure water on the high-pressure hose are utilized, the extension rigidity of the swinging chain or the swinging cable can be improved, the mechanical reaming efficiency is improved, and the aim of assisting hydraulic cutting is fulfilled for the coal seam in the drill holes by matching with the high-pressure water jet nozzle at the tail end of the high-pressure hose in the swinging chain or the swinging cable.
The device has the advantages that the hydraulic cutting and flexible mechanical reaming are combined to conduct rapid and efficient reaming on the coal mine gas extraction drilled hole, the device is simple in structure, high in reliability, good in wear resistance and stability, convenient to withdraw, and suitable for popularization and application.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic view of the overall structure of the combined reaming device of the present invention.
Fig. 2 is a schematic perspective view of the end of the chain slinger of the present invention.
Detailed Description
The present invention will be described more clearly with reference to the accompanying drawings, which are included to illustrate and not to limit the present invention. All other embodiments, which can be obtained by those skilled in the art without any inventive step based on the embodiments of the present invention, should be included in the scope of the present invention.
Example 1
The invention provides a combined reaming method, which comprises the following steps:
1) drilling and positioning: measuring and setting out according to the coal seam condition to position the drilling hole;
2) drilling: firstly, drilling a common drill hole in a coal seam through a rock layer by using a common gas extraction drilling machine, stopping drilling after the depth of the common drill hole reaches a designed position, and withdrawing a common drill bit;
3) reaming: flexible combined reaming is carried out by adopting a mode of combining hydraulic reaming and mechanical flexible reaming;
31) hydraulic reaming is carried out by adopting a hydraulic cutting head provided with a high-pressure spray head along the radial direction;
32) the flexible reaming device comprises a mechanical flexible reaming head, wherein a flexible reaming bit is connected to the rear end of a hydraulic cutting head, mechanical flexible reaming is performed through the flexible reaming bit, the flexible reaming bit is driven by a drill rod with a speed reduction motor, a swinging chain or a swinging cable is arranged on the flexible reaming bit along the radial direction, a high-pressure hose is arranged in the swinging chain or the swinging cable in a penetrating manner, the high-pressure hose is communicated with high-pressure water in the reaming bit, and one end, far away from the flexible reaming bit, of the high-pressure hose is matched with the swinging chain or the swinging cable through a high-pressure water nozzle to perform hydraulic auxiliary cutting on; the working speed of the speed reducing motor is 500r/min, and a swinging chain or a swinging cable is unfolded by utilizing the rotation inertia, so that the precision of the hole expanding size is ensured and the hole expanding efficiency is improved; the working pressure of the high-pressure water is 30MPa, so that a better hydraulic cutting effect is achieved.
Example 2
As shown in fig. 1-2, the invention further provides a combined reaming device, which comprises a drill rod 1, a hydraulic cutting head 2 and a flexible reaming bit 3, wherein one end of the drill rod 1 is in transmission connection with a speed reduction motor (not shown in the figures), the other end of the drill rod 1 is fixedly connected with the flexible reaming bit 3, the hydraulic cutting head 2 is connected to one end of the flexible reaming bit 3 away from the drill rod 1, a communicated high-pressure water channel 4 is arranged in the drill rod 1, the flexible reaming bit 3 and the hydraulic cutting head 2, a plurality of high-pressure nozzles 5 are radially arranged on the outer circumferential surface of the hydraulic cutting head 2, one end of the hydraulic cutting head 2 away from the flexible reaming bit 3 is also connected with a tunneling bit 6, the flexible reaming bit 3 comprises a reaming base 3-1 and a swinging chain 3-2, the swinging chain 3-2 is made of high-strength wear-resistant metal, and a high-pressure hose 3, and a high-pressure water spraying opening is formed in one end, far away from the reaming seat 3-1, of the high-pressure hose 3-21. After the device enters a coal seam, the drilling depth can be increased through the tunneling drill bit 6, the hydraulic cutting head 2 and the flexible hole expanding drill bit 3 are matched for operation to realize quick hole expanding while drilling depth, and after hole expanding is completed, quick hole withdrawing can be realized by releasing pressure to the high-pressure hoses 3-21, so that the working efficiency of hole expanding operation is effectively improved, and the reliability of the hole expanding device is improved.
The outer surfaces of the reaming seat 3-1 and the drill rod 1 are provided with spiral guide chutes 7, so that broken coal particles can be conveniently and timely conveyed out of drilled holes during reaming, and the reaming efficiency is ensured. The swinging chain 3-2 adopts a mining high-strength round-link chain, has high degree of freedom and is not easy to generate fatigue damage. The high-pressure hose 3-21 is made of armored metal hoses, so that the service life of the high-pressure hose 3-21 can be guaranteed. The high-strength wear-resistant metal material is 27SiMn material, so that the strength is high and the wear resistance is good; the diamond composite sheet 8 is arranged on the throwing chain 3-2, so that the wear resistance of the throwing chain 3-2 can be improved, and the service life of the device can be prolonged. The reaming base 3-1 is provided with three circles of reaming assemblies at intervals along the axial direction, and each circle of reaming assembly at least comprises two swinging chains 3-2, so that the stability of the operation of the flexible reaming bit 3 is ensured, the reliability of the device is improved, and the reaming efficiency is ensured. The reaming radius of the three circles of reaming assemblies is respectively 100mm, 200mm and 250mm, the swing chain 3-2 is closer to the hydraulic cutting head 2, the smaller the reaming radius is, the device is reamed step by step from front to back in the drilling direction of the drill bit, each circle of reaming assemblies are in the reasonable reaming radius, the abrasion of the device is reduced, and the reliability of the device is ensured while the reaming efficiency is improved.
The invention firstly drills common drill holes on a rock stratum and a coal seam through a common gas extraction drilling machine, carries out reaming operation by replacing a flexible reaming bit 3 with a hydraulic cutting head 2 after the common drill bit is withdrawn, firstly carries out hydraulic jet by the hydraulic cutting head 2 at the front end of the drill hole to make the coal seam looser, then mechanically throws the coal seam through a throwing chain 3-2 on the flexible reaming bit 3 to accelerate the crushing of the coal seam, can improve the stretching rigidity of the throwing chain 3-2 by penetrating a high-pressure hose 3-21 in the throwing chain 3-2 and utilizing the expansion and stretching action of high-pressure water on the high-pressure hose 3-21, is beneficial to improving the mechanical reaming efficiency, and then plays the aim of assisting the hydraulic cutting of the coal seam in the drill hole by matching with a high-pressure water jet orifice at the tail end of the high-pressure hose 3-21 in the throwing chain 3-2, and is beneficial to improving the reliability of, but also is beneficial to further improving the hole expanding efficiency.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the illustrated embodiments.
Claims (10)
1. A combined reaming method, comprising the steps of:
1) drilling and positioning: measuring and setting out according to the coal seam condition to position the drilling hole;
2) drilling: firstly, drilling a common drill hole in a coal seam through a rock layer by using a common gas extraction drilling machine, stopping drilling after the depth of the common drill hole reaches a designed position, and withdrawing a common drill bit;
3) reaming: flexible combined reaming is carried out by adopting a mode of combining hydraulic reaming and mechanical flexible reaming;
31) hydraulic reaming is carried out by adopting a hydraulic cutting head provided with a high-pressure spray head along the radial direction;
32) flexible reaming bit is connected at the rear end of hydraulic power cutting head to flexible reamer bit of machinery, carries out the flexible reaming of machinery through flexible reamer bit, flexible reamer bit passes through the drilling rod drive of taking gear motor, be equipped with along radial getting rid of the chain or getting rid of the cable on the flexible reamer bit, wear to be equipped with high-pressure hose in getting rid of the chain or getting rid of the cable, high-pressure hose is linked together with the water under high pressure in the reamer bit, the one end that flexible reamer bit was kept away from to high-pressure hose is got rid of the chain or gets rid of the cable through the cooperation of high-pressure water jet, carries out the supplementary cutting.
2. The combined reaming method according to claim 1, wherein in step 32), the operating speed of the reduction motor is 500 r/min.
3. The combined reaming method of claim 1, wherein in step 32), the high pressure water has a working pressure of 30 MPa.
4. A combined reaming device based on the combined reaming method according to claim 1, characterized in that: including drilling rod, water conservancy cutting head and flexible reamer bit, drilling rod one end is connected with the gear motor transmission, the other end and flexible reamer bit fixed connection, the one end that the drilling rod was kept away from to the water conservancy cutting head at flexible reamer bit is connected, be equipped with the high pressure water channel who link up mutually in drilling rod, flexible reamer bit and the water conservancy cutting head, radially be equipped with a plurality of high pressure nozzle on the outer disc of water conservancy cutting head, and the water conservancy cutting head one end of keeping away from flexible reamer bit still is connected with the tunnelling drill bit, flexible reamer bit includes the reaming seat and gets rid of the chain or gets rid of the cable, get rid of the chain or get rid of the cable and all adopt the high-strength wear-resisting metal material, and get rid of the chain or get rid of and wear to be equipped.
5. The combined reaming device of claim 4, wherein: the method is characterized in that: the swinging chain adopts a mining high-strength round-link chain.
6. The combined reaming device of claim 4, wherein: the high-pressure hose is an armored metal hose.
7. The combined reaming device of claim 4, wherein: the high-strength wear-resistant metal material is a 27SiMn material.
8. The combined reaming device of claim 4, wherein: and a diamond compact is arranged on the swinging chain or the swinging cable.
9. The combined reaming device of claim 4, wherein: the reaming base is provided with three circles of reaming assemblies at intervals along the axial direction, and each circle of reaming assembly at least comprises two throwing chains or throwing cables.
10. The combined reaming device of claim 9, wherein: the reaming radius of the three-ring reaming assembly is 100mm, 200mm and 250mm respectively, and the closer the chain throwing or cable throwing is to the hydraulic cutting head, the smaller the reaming radius is.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010743578.1A CN111779453A (en) | 2020-07-29 | 2020-07-29 | Combined reaming method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010743578.1A CN111779453A (en) | 2020-07-29 | 2020-07-29 | Combined reaming method and device |
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| Publication Number | Publication Date |
|---|---|
| CN111779453A true CN111779453A (en) | 2020-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010743578.1A Pending CN111779453A (en) | 2020-07-29 | 2020-07-29 | Combined reaming method and device |
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| CN (1) | CN111779453A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412465A (en) * | 2020-11-26 | 2021-02-26 | 河南理工大学 | High-pressure water gun for coal mining |
| CN112727378A (en) * | 2021-02-05 | 2021-04-30 | 黄南 | Drill rod for oil exploitation |
-
2020
- 2020-07-29 CN CN202010743578.1A patent/CN111779453A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412465A (en) * | 2020-11-26 | 2021-02-26 | 河南理工大学 | High-pressure water gun for coal mining |
| CN112412465B (en) * | 2020-11-26 | 2023-06-13 | 河南理工大学 | High-pressure water gun for coal mining |
| CN112727378A (en) * | 2021-02-05 | 2021-04-30 | 黄南 | Drill rod for oil exploitation |
| CN112727378B (en) * | 2021-02-05 | 2023-11-24 | 荆州大方智能科技股份有限公司 | Drill rod for petroleum exploitation |
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