CN219570089U - Hydraulic fracturing system utilizing hollow drill rod - Google Patents
Hydraulic fracturing system utilizing hollow drill rod Download PDFInfo
- Publication number
- CN219570089U CN219570089U CN202321192814.0U CN202321192814U CN219570089U CN 219570089 U CN219570089 U CN 219570089U CN 202321192814 U CN202321192814 U CN 202321192814U CN 219570089 U CN219570089 U CN 219570089U
- Authority
- CN
- China
- Prior art keywords
- drill rod
- drill
- hollow
- rod
- hole
- 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.)
- Active
Links
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model discloses a hydraulic fracturing system utilizing a hollow drill rod, which comprises a drilling machine with a drill rod and a hole packer, wherein the rear end of the drilling machine is sequentially connected with a control valve and a high-pressure water injection pump through a water pipe, the drill rod is arranged in a drill hole, the hole packer is used for sealing holes at the opening of the drill hole, the drill rod is formed by butting a plurality of sections of hollow drill rods, a row of grooves are formed in the outer surface of the drill rod and used for placing and fixing cables, the cables are restrained by fastening a screw ring with external threads at the lower end of the drill rod, a pressure sensor is arranged in the hollow drill rod, and the pressure sensor can be used for monitoring and recording pressure changes in the drill hole in real time. The hollow drill rod is not limited by the distance, a plurality of drill rods can be butted according to the length required by the present place, deep hole hydraulic fracturing injection is realized, and the method is flexible and changeable; the outside of the drill rod is provided with a column of grooves which can be used for placing and fixing cables so as to conveniently convey discharge electrodes into holes, and in addition, the inside of the drill rod is of a hollow structure, and a pressure sensor can be installed in the drill rod according to the requirement.
Description
Technical Field
The utility model relates to the technical field of safe and efficient mining of coal strata, in particular to a hydraulic fracturing system utilizing a hollow drill rod.
Background
In recent years, with the increasing depth of mine exploitation, higher requirements are being placed on safe exploitation of coal seams. The existing hydraulic fracturing system utilizes a hollow drill rod to inject high-pressure water, but the existing drill rod structure is mostly single-section, the manufacturing difficulty of the drill rod is high, and the length of the drill rod is greatly limited; meanwhile, the drill rod has single function, and cannot meet the requirements of chip removal, wiring, sensor installation and other aspects.
Disclosure of Invention
The utility model aims to provide a hydraulic fracturing system utilizing a hollow drill rod, which can remove chips, wire layout and sensor installation, meets the deep drilling requirement, reduces the manufacturing difficulty and is flexible and changeable.
The technical scheme adopted by the utility model is as follows: the utility model provides an utilize hydraulic fracturing system of hollow drilling rod, includes rig, hole packer of taking the drilling rod, control valve and high-pressure water injection pump are connected gradually through the water pipe to the rear end of rig, the drilling rod is arranged in the drilling, and the hole packer is carried out the hole packer and is sealed to the drilling oral area, the drilling rod adopts the butt joint of multisection hollow drilling rod to form, and the surface of drilling rod is equipped with a series of recess for place and fix the cable, and utilize the fastening of helicoid and drilling rod lower extreme external screw thread to carry out the cable constraint, be equipped with pressure sensor in the hollow drilling rod, utilize pressure sensor to monitor in real time and record drilling internal pressure change.
As the scheme is preferable, each section of drill rod comprises an inner drill rod, an outer drill rod and a nut, wherein the inner drill rod and the outer drill rod are nested together to form an inner channel and an outer channel, the inner drill rod adopts a spiral drill rod, the spiral structure is combined with the outer channel for removing scraps, and the inner channel is used for injecting water; the inner part and the outer part of the lower end of the inner drill rod are provided with threads for realizing the butt joint of the drill rods; the inner part of the upper end and the outer part of the lower end of the outer drill rod are internally and externally provided with threads, so that the inner drill rod and the outer drill rod are nested, and the hole wall can be protected from being damaged in the drilling process; the number of nuts on each section of drill rod is at least two, threads are arranged inside and outside the nuts, the nuts are used for nesting connection of the inner drill rod and the outer drill rod, the nuts are fixedly connected through middle spiral blades, and the hollow parts among the blades of the spiral blades are used for removing scraps. The inner drill rod and the outer drill rod are detachable, are of hollow structures, can be used for injecting water, can be used for selecting whether to detach the inner drill rod according to the water consumption of the present place, and can increase the unit water injection rate of the outer drill rod if the water consumption is large. The drill rod is simple in structure, strong in stability and convenient to assemble; not only is favorable for slag discharge, but also can protect the hole wall from damage.
It is further preferable that the outer diameter of the upper and lower ends of the outer drill rod is larger than the outer diameter at the intermediate position.
It is further preferred that the number of nuts on each section of drill rod is two, and the nuts are respectively positioned at two ends of the drill rod.
The utility model has the beneficial effects that: the hollow drill rod is not limited by the distance, a plurality of drill rods can be butted according to the length required by the present place, deep hole hydraulic fracturing injection is realized, and the method is flexible and changeable; the outside of the drill rod is provided with a column of grooves which can be used for placing and fixing cables so as to conveniently convey discharge electrodes into holes, and in addition, the inside of the drill rod is of a hollow structure, and a pressure sensor can be installed in the drill rod according to the requirement.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is an exploded view of a single section of drill pipe.
Fig. 3 is a schematic view of a hollow drill rod after two sections are butted.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1-3, a hydraulic fracturing system using a hollow drill rod mainly comprises a cable 8, a pressure sensor 7, a drilling machine 9 with a drill rod, a hole packer 10, a water pipe 11, a control valve 12 and a high-pressure water injection pump 13.
The rear end of the drilling machine 9 is sequentially connected with a control valve 12 and a high-pressure water injection pump 13 through a water pipe 11, the high-pressure water injection pump 13 is used as power, and high-pressure water in a water tank is injected into a drill hole to carry out hydraulic fracturing. The drill rod is placed in the drill hole, and the opening of the drill hole is sealed by the hole sealer 10. And the hole packer is used for sealing holes, and high-pressure water can be continuously injected into the drilled holes to carry out hydraulic fracturing.
The drill rod is formed by butt joint of a plurality of sections of hollow drill rods, a column of grooves 2a are formed in the outer surface of the drill rod and used for placing and fixing cables 8, and the cables are restrained by fastening the screw rings 4 with external threads at the lower end of the drill rod. The pressure sensor 7 is arranged in the hollow drill rod, and the pressure sensor 7 can be used for monitoring and recording the pressure change in the drill hole in real time.
The drill rod adopts a double-drill rod structure and can realize multi-section butt joint. Each section of drill rod mainly comprises an inner drill rod 1, an outer drill rod 2, a nut 3 and a spiral ring 4.
The inner drill rod 1 is nested with the outer drill rod 2 to form an inner passage 5 and an outer passage 6. The inner drill rod 1 adopts a spiral drill rod, the spiral structure is combined with the outer channel 6 for removing the chip slag, and the inner channel 5 is used for injecting water.
The inner drill rod 1 is threaded at the upper end, the inner and the outer parts of the lower end, and is used for realizing the butt joint of the drill rods. The inner part of the upper end and the inner part of the lower end of the outer drill rod 2 are internally and externally provided with threads, so that the inner drill rod 1 and the outer drill rod 2 are nested, and the hole wall can be protected from being damaged in the drilling process.
The outer surface of the outer drill rod 2 is provided with a row of grooves 2a for placing and fixing cables, and the cables are restrained by fastening the screw ring 4 with the external threads at the lower end of the outer drill rod 2. Preferably, the outer diameter of the upper and lower ends of the outer drill rod 2 is larger than the outer diameter at the intermediate position.
At least two nuts 3 are arranged on each section of drill rod, threads are arranged inside and outside the nuts 3 and used for nesting connection of the inner drill rod 1 and the outer drill rod 2, the nuts are fixedly connected through middle spiral blades 3a, and the blades of the spiral blades 3a are hollowed out for removing scraps. Preferably, the number of nuts 3 on each section of drill rod is two, and the nuts are respectively positioned at two ends of the drill rod.
After the drilling construction is completed, the drill rod is withdrawn, the drill bit at the front end of the drill rod is unscrewed, the discharge electrode of the connecting cable can be arranged at the front end of the drill rod, the discharge electrode is fed into the drill hole through the drill rod, and after fracturing, the drill rod does not need to be taken out to directly discharge high-voltage electric pulse through the discharge electrode. After hydraulic fracturing is completed, the electrical pulse generating system can be remotely started to discharge. The discharge electrode discharges in water, the electric energy is converted into mechanical energy, and the shock wave which propagates outwards in a spherical shape is formed and acts on the coal body or the rock body to enable the coal body or the rock body to generate new cracks, and meanwhile, the directional large-range cracks generated by hydraulic slotting and hydraulic fracturing are further expanded and extended.
Claims (4)
1. The utility model provides an utilize hydraulic fracturing system of hollow drilling rod, includes rig (9) of taking the drilling rod, hole packer (10), control valve (12) and high-pressure water injection pump (13) are connected gradually through water pipe (11) to the rear end of rig (9), in the drilling was arranged in to the drilling rod, and the hole packer (10) are passed through in the drilling hole oral area and are sealed, its characterized in that: the drill rod is formed by butt joint of a plurality of sections of hollow drill rods, a row of grooves (2 a) are formed in the outer surface of the drill rod and used for placing and fixing cables (8), the cables are restrained by fastening of screw rings (4) and external threads at the lower end of the drill rod, a pressure sensor (7) is arranged in the hollow drill rod, and the pressure sensor (7) can be used for monitoring and recording pressure changes in a drilled hole in real time.
2. A hydraulic fracturing system utilizing a hollow drill rod as recited in claim 1 wherein: the method is characterized in that: each section of drill rod comprises an inner drill rod (1), an outer drill rod (2) and a nut (3), wherein the inner drill rod (1) and the outer drill rod (2) are nested together to form an inner channel (5) and an outer channel (6), the inner drill rod (1) adopts a spiral drill rod, the spiral structure is combined with the outer channel (6) to be used for removing scraps, and the inner channel (5) is used for injecting water; the inner drill rod (1) is provided with threads at the inner part and the outer part of the lower end at the upper end and is used for realizing the butt joint of the drill rods; the inner part of the upper end and the inner part of the lower end of the outer drill rod (2) are internally and externally provided with threads, so that the inner drill rod (1) and the outer drill rod (2) are nested, and the hole wall can be protected from being damaged in the drilling process; the number of nuts (3) on each section of drill rod is at least two, threads are arranged inside and outside the nuts (3) and used for nesting connection of the inner drill rod (1) and the outer drill rod (2) and are fixedly connected through middle spiral blades (3 a), and the hollow parts among the blades of the spiral blades (3 a) are used for removing chip residues.
3. A hydraulic fracturing system utilizing a hollow drill rod as recited in claim 2 wherein: the outer diameters of the upper end and the lower end of the outer drill rod (2) are larger than the outer diameter of the middle position.
4. The hydraulic fracturing system utilizing a hollow drill pipe of claim 2 wherein: the number of the nuts (3) on each section of drill rod is two, and the nuts are respectively positioned at the two ends of the drill rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321192814.0U CN219570089U (en) | 2023-05-17 | 2023-05-17 | Hydraulic fracturing system utilizing hollow drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321192814.0U CN219570089U (en) | 2023-05-17 | 2023-05-17 | Hydraulic fracturing system utilizing hollow drill rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219570089U true CN219570089U (en) | 2023-08-22 |
Family
ID=87655229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321192814.0U Active CN219570089U (en) | 2023-05-17 | 2023-05-17 | Hydraulic fracturing system utilizing hollow drill rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219570089U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117345190A (en) * | 2023-11-20 | 2024-01-05 | 重庆大学 | Electric pulse-ultrasonic dual fracturing coal seam anti-reflection system and application method |
| CN117514108A (en) * | 2023-11-20 | 2024-02-06 | 重庆大学 | Ultrasonic-hydraulic acupoint-making pressure-relief composite fracturing permeability-increasing system and application method |
-
2023
- 2023-05-17 CN CN202321192814.0U patent/CN219570089U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117345190A (en) * | 2023-11-20 | 2024-01-05 | 重庆大学 | Electric pulse-ultrasonic dual fracturing coal seam anti-reflection system and application method |
| CN117514108A (en) * | 2023-11-20 | 2024-02-06 | 重庆大学 | Ultrasonic-hydraulic acupoint-making pressure-relief composite fracturing permeability-increasing system and application method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN219570089U (en) | Hydraulic fracturing system utilizing hollow drill rod | |
| CN109577864B (en) | Electrode drill bit for coiled tubing high-voltage electric pulse-mechanical composite drilling | |
| CN101660391B (en) | Radial horizontal drilling device | |
| CN109630020A (en) | Multichannel high-low pressure composite plasma boring method | |
| CN109577859B (en) | Continuous tube high-voltage electric pulse-mechanical composite rock breaking drilling method | |
| CN109026097B (en) | Anti-floating anchor rod double-drill-bit hole forming construction method | |
| CN219034680U (en) | Underground coal seam horizontal drilling push rod shifting anti-reflection system | |
| CN111456801B (en) | Method for permeability-increasing coal seam in drilling holes in top plate and bottom plate of coal seam | |
| CN219733306U (en) | Drill rod for deep coal rock mass | |
| CN201627535U (en) | Secondary reaming drainage bit | |
| CN206769819U (en) | Broken screw thread deslagging bottom plate efficient drilling drill bit device in a kind of outer brill | |
| CN219570090U (en) | High-voltage electric pulse system for deep coal seam | |
| CN204492646U (en) | Bore broken integrated sluicing internal discharging type tunnel drilling tool | |
| CN116677324A (en) | Drill rod suitable for deep coal rock mass | |
| CN113700522B (en) | Gas extraction process method for lower screen pipe while drilling and matched lower screen pipe drill bit | |
| CN115234237A (en) | Device for fracturing hard rock mass by underground electric pulse based on liquid-electricity effect | |
| CN113756803A (en) | Rock breaking method based on impact-resistant water-filled bag | |
| CN213063513U (en) | Sleeve pipe coring drilling device | |
| CN201544128U (en) | Hydraulic sand-blasting cutter | |
| CN201196045Y (en) | Down-hole jet stream decompression device | |
| CN208534396U (en) | A kind of drilling structure of double drill bits | |
| CN211422544U (en) | Multi-edge double-channel multi-stage pushing deslagging drill rod | |
| CN116557040A (en) | Coal seam anti-reflection and outburst prevention extraction method for high-voltage electric pulse cooperated hydraulic directional seam making | |
| CN116557041A (en) | Remote control shock wave synergistic hydraulic large-range permeability-increasing coal seam extraction method | |
| CN110748304A (en) | Multi-edge double-channel multi-stage pushing deslagging drill rod and use method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |