CN217106855U - Double-thread double-wall drill rod - Google Patents
Double-thread double-wall drill rod Download PDFInfo
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- CN217106855U CN217106855U CN202220970846.8U CN202220970846U CN217106855U CN 217106855 U CN217106855 U CN 217106855U CN 202220970846 U CN202220970846 U CN 202220970846U CN 217106855 U CN217106855 U CN 217106855U
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Abstract
The utility model relates to the technical field of geological drilling, in particular to a double-thread double-wall drill rod which has light weight and good sealing performance and avoids the phenomena of air leakage and air leakage between an inner pipe and an outer pipe, and comprises the outer pipe and the inner pipe; the outer pipe and the inner pipe are both through pipes with two open ends, the inner pipe is arranged on the inner side of the outer pipe, one end of the outer pipe is connected with the female joint of the outer pipe, and the other end of the outer pipe is connected with the male joint of the outer pipe; the one end of inner tube matches and pegs graft in the inboard of inner tube female joint, and the inner tube male joint is connected to the other end, outer tube female joint and inner tube female joint fixed connection, outer tube male joint and inner tube male joint fixed connection, and the junction of inner tube and inner tube female joint is equipped with the sealing washer, and when two drilling rods interconnect, outer tube male joint can with the outer tube female joint threaded connection of another drilling rod, and inner tube male joint also can with the inner tube female joint threaded connection of another drilling rod simultaneously.
Description
Technical Field
The utility model relates to a technical field of geological drilling especially relates to a double thread double-walled drilling rod.
Background
The air reverse circulation continuous sampling coring drilling technology can realize continuous sampling, has higher sampling efficiency than the coring efficiency of drilling, has low labor intensity, and can be suitable for drilling in the leaking stratum and water-deficient areas, thereby being widely applied in the world. The double-wall drill rod is an important tool in the air reverse circulation drilling process, the double-wall drill rod is a conveying channel for high-pressure air and broken rock debris, the high-pressure air is conveyed to the bottom of a hole through an annular gap between an inner pipe and an outer pipe of the double-wall drill rod to drive a down-the-hole hammer to impact and drill the broken rock, and the rock debris at the bottom of the hole is discharged out of a hole through a central channel of an inner pipe of the double-wall drill rod.
The outer pipe of the conventional air reverse circulation double-wall drill rod is connected by threads, the inner pipe is in a plug-in type, and the inner pipe and the outer pipe are made of steel materials, so that the whole weight of the drill rod is large, the drill rod is difficult to unscrew, the power of a drilling machine required in the drilling process is large, and the drilling efficiency is influenced; the plug-in type inner tube structure needs to be sealed by a sealing ring to seal the plug-in position of the inner tube, the inner tube and the outer tube need to be plugged in each time of additionally connecting the drill rod, the sealing ring is easy to cut, the sealing performance between the inner tubes is influenced, the phenomena of air leakage and air leakage between the inner tube and the outer tube are easy to occur, the reverse circulation is not facilitated to be formed, the application of the reverse circulation is influenced by the problems, and the plug-in type inner tube structure becomes a main weak point influencing the drilling efficiency.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a double thread double-walled drilling rod of usefulness is bored in air reverse circulation, it has light in weight, characteristics such as the leakproofness is good, avoid taking place between the interior outer tube to get across gas, gas leakage phenomenon.
In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:
the utility model relates to a double-thread double-wall drill rod, which comprises an outer pipe and an inner pipe; the outer pipe and the inner pipe are both through pipes with two open ends, the inner pipe is arranged on the inner side of the outer pipe, one end of the outer pipe is connected with the female joint of the outer pipe, and the other end of the outer pipe is connected with the male joint of the outer pipe; one end of the inner pipe is matched and inserted into the inner side of the inner pipe female joint, the other end of the inner pipe is connected with the inner pipe male joint, the outer pipe female joint is fixedly connected with the inner pipe female joint, the outer pipe male joint is fixedly connected with the inner pipe male joint, a sealing ring is arranged at the connecting part of the inner pipe and the inner pipe female joint, when two drill rods are connected with each other, the outer pipe male joint can be in threaded connection with the outer pipe female joint of another drill rod, and meanwhile, the inner pipe male joint can also be in threaded connection with the inner pipe female joint of another drill rod.
In a possible technical scheme, the outer tube and the inner tube are made of aluminum alloy, and the outer tube female joint, the outer tube male joint, the inner tube female joint and the inner tube male joint are made of alloy steel.
In one possible technical scheme, the outer pipe is in threaded connection with the outer pipe female joint and the outer pipe male joint respectively; the inner pipe is connected with the male connector of the inner pipe through threads; when two drilling rods are connected with each other, the male joint of the outer pipe can be in threaded matching connection with the female joint of the outer pipe of the other drilling rod, and meanwhile, the male joint of the inner pipe can also be in threaded matching connection with the female joint of the inner pipe of the other drilling rod.
In a possible technical scheme, the inner pipe female joint and the inner pipe male joint are both through pipes with two open ends, and positioning structures are arranged on the outer sides of the through pipes and are fixedly connected with the outer pipe female joint and the inner pipe male joint respectively.
In a possible technical scheme, the positioning structures are three positioning claws which are uniformly distributed.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses outer tube female joint with inner tube female joint fixed connection, outer tube male joint with inner tube male joint fixed connection, fix a position outer tube and inner tube, the one end of inner tube adopts the grafting mode to be connected with the inboard of inner tube female joint, under the prerequisite of guaranteeing that the inner tube body does not bear the moment of torsion and the axial force in the drilling process, need not to add when connecing the drilling rod at every turn and carry out the grafting of inner tube, do not influence the leakproofness of sealing washer; high-pressure air is conveyed to the bottom of the hole through an annular gap between the inner pipe and the outer pipe of the double-wall drill rod to drive the down-the-hole hammer to impact and drill broken rocks, and rock debris at the bottom of the hole is discharged out of the hole through a central channel of the inner pipe of the double-wall drill rod, so that the phenomena of air leakage and air leakage between the inner pipe and the outer pipe are prevented, and reverse circulation is favorably formed.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic sectional view of the female joint of the inner pipe along the direction A-A or the male joint of the inner pipe along the direction B-B;
reference numerals: 1-outer tube female joint; 2-an outer tube; 3-outer tube male joint; 4-inner pipe female joint; 5-sealing ring; 6-inner tube; 7-inner tube male joint; 8-positioning claws.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
As shown in fig. 1, the double-thread double-wall drill rod of the embodiment of the present invention includes an outer pipe 2 and an inner pipe 6; the outer pipe 2 and the inner pipe 6 are through pipes with two open ends, the inner pipe 6 is arranged on the inner side of the outer pipe 2, the left end of the outer pipe 2 is connected with the outer pipe female joint 1, the right end of the outer pipe is connected with the outer pipe male joint 3, the outer pipe female joint 1 and the outer pipe male joint 3 are through pipes with two open ends, and the outer pipe female joint 1 and the outer pipe male joint 3 are fixedly connected with the outer pipe 2 or detachably connected with the outer pipe, for example, the connection modes include but not limited to welding, riveting, threaded connection or buckle connection and the like; the left end of the inner pipe 6 is inserted inside the inner pipe female joint 4 in a matching manner, and the right end of the inner pipe is connected with the inner pipe male joint 7 in a fixed connection or a detachable connection manner, for example, welding, riveting, threaded connection or buckling connection or the like can be selected; the inner pipe female joint 4 and the inner pipe male joint 7 are also through pipes with two open ends, the outer pipe female joint 1 is fixedly connected with the inner pipe female joint 4, the outer pipe male joint 3 is fixedly connected with the inner pipe male joint 7, and the connection mode includes but is not limited to welding, riveting, threaded connection or buckle connection; the connecting part of the inner pipe 6 and the inner pipe female joint 4 is provided with a sealing ring 5, when two drill rods are connected with each other, the outer pipe male joint 3 can be in threaded connection with the outer pipe female joint 1 of another drill rod, and meanwhile, the inner pipe male joint 7 can also be in threaded connection with the inner pipe female joint 4 of another drill rod.
The utility model discloses outer tube female joint 1 and inner tube female joint 4 fixed connection, outer tube male joint 3 and inner tube male joint 7 fixed connection, fix a position outer tube 2 and inner tube 6, the one end of inner tube 6 adopts the grafting mode to be connected with the inboard of inner tube female joint 4, under the prerequisite of guaranteeing that the inner tube body does not bear the moment of torsion and the axial force in the drilling process, need not to add when connecing the drilling rod at every turn and carry out the interior outer tube grafting, do not influence the leakproofness of sealing washer; high-pressure air is conveyed to the bottom of the hole through an annular gap between the inner pipe and the outer pipe of the double-wall drill rod to drive the down-the-hole hammer to impact and drill broken rocks, and rock debris at the bottom of the hole is discharged out of the hole through a central channel of the inner pipe of the double-wall drill rod, so that the phenomena of air leakage and air leakage between the inner pipe and the outer pipe are prevented, and reverse circulation is favorably formed.
In the embodiment, in order to solve the problems of large overall weight of the drill rod and difficulty in screwing and unscrewing the drill rod, the outer pipe 2 and the inner pipe 6 are made of aluminum alloy, the density of the aluminum alloy is 1/3 of steel materials, the drill rod is convenient to connect, the power consumption of the drilling machine can be obviously reduced in the drilling process, and the capability of the drilling machine for handling accidents in the hole is improved; the outer pipe female joint 1, the outer pipe male joint 3, the inner pipe female joint 4 and the inner pipe male joint 7 are all made of alloy steel, so that the strength in the drilling process is guaranteed, and the abrasion resistance is good in the process of additionally connecting a drill rod.
As a specific embodiment, the outer pipe female joint 1 and the inner pipe female joint 4 are welded into a whole through punching, the outer pipe male joint 3 and the inner pipe male joint 7 are welded into a whole through punching, threads are processed at two ends of the outer pipe female joint 1 and the inner pipe female joint 4, threads are processed at two ends of the outer pipe male joint 3 and the inner pipe male joint 7, and the outer pipe 2 is respectively connected with the outer pipe female joint 1 and the outer pipe male joint 3 through threads; the inner pipe 6 is connected with the male connector 7 of the inner pipe by screw thread; the outer pipe male joint 3 and the outer pipe female joint 1 as well as the inner pipe male joint 7 and the inner pipe female joint 4 respectively adopt threads with the same pitch and the same buckle type, when two drill rods are connected with each other, the outer pipe male joint 3 can be in threaded matching connection with the outer pipe female joint 1 of another drill rod, and meanwhile, the inner pipe male joint 7 can also be in threaded matching connection with the inner pipe female joint 4 of another drill rod; the inner pipe and the outer pipe are connected in a double-thread mode, sealing performance of the drill rod is guaranteed, air leakage between the inner pipe and the outer pipe of the double-wall drill rod is effectively avoided, and reverse circulation is formed.
Preferably, inner tube female joint 4 and inner tube male joint 7 are the siphunculus of both ends open, its outside all is provided with location structure, location structure respectively with outer tube female joint 1 and inner tube male joint 7 fixed connection, location structure carries out radial positioning with the inner tube, high-pressure air can pass through at its clearance, and outer tube female joint 1 and the welding of inner tube female joint 4, outer tube male joint 3 and the welding of inner tube male joint 7, carry out axial positioning to the inner tube simultaneously, make double thread double-walled drilling rod inner tube mounted position fixed before the add and connect the drilling rod, need not to carry out interior outer tube grafting when adding the drilling rod at every turn, do not influence the leakproofness of sealing washer.
As shown in fig. 2, as one embodiment, the positioning structures are three positioning claws 8 which are uniformly distributed.
The double-thread double-wall drill rod provided by the embodiment of the utility model has the advantages that when the double-thread double-wall drill rod works, the outer pipe female joint 1 and the inner pipe female joint 4 are welded into a whole through punching, the outer pipe male joint 3 and the inner pipe male joint 7 are welded into a whole through punching, threads are processed at the two ends of the outer pipe female joint 1 and the inner pipe female joint 4, threads are processed at the two ends of the outer pipe male joint 3 and the inner pipe male joint 7, and the outer pipe 2 is in threaded connection with the outer pipe female joint 1 and the outer pipe male joint 3 respectively; the inner pipe 6 is connected with the inner pipe male joint 7 by screw threads, and the left end of the inner pipe 6 is matched and inserted into the inner side of the inner pipe female joint 4; when two drill rods are connected with each other, the outer pipe male joint 3 can be in threaded matching connection with the outer pipe female joint 1 of the other drill rod, and meanwhile, the inner pipe male joint 7 can also be in threaded matching connection with the inner pipe female joint 4 of the other drill rod; high-pressure air is conveyed to the bottom of the hole through an annular gap between the inner pipe and the outer pipe of the double-wall drill rod to drive the down-the-hole hammer to impact and drill broken rocks, and rock debris at the bottom of the hole is discharged out of the hole through a central channel of the inner pipe of the double-wall drill rod.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A double-thread double-wall drill rod comprises an outer pipe (2) and an inner pipe (6); the pipe is characterized in that the outer pipe (2) and the inner pipe (6) are through pipes with two open ends, the inner pipe (6) is arranged on the inner side of the outer pipe (2), one end of the outer pipe (2) is connected with the outer pipe female joint (1), and the other end of the outer pipe (2) is connected with the outer pipe male joint (3); the drill pipe is characterized in that one end of the inner pipe (6) is matched and inserted into the inner side of the inner pipe female joint (4), the other end of the inner pipe (6) is connected with an inner pipe male joint (7), the outer pipe female joint (1) is fixedly connected with the inner pipe female joint (4), the outer pipe male joint (3) is fixedly connected with the inner pipe male joint (7), a sealing ring (5) is arranged at the connecting part of the inner pipe (6) and the inner pipe female joint (4), when two drill pipes are connected with each other, the outer pipe male joint (3) can be in threaded connection with the outer pipe female joint (1) of another drill pipe, and meanwhile, the inner pipe male joint (7) can also be in threaded connection with the inner pipe female joint (4) of another drill pipe.
2. The double-thread double-wall drill rod according to claim 1, characterized in that the outer pipe (2) and the inner pipe (6) are made of aluminum alloy, and the outer pipe female joint (1), the outer pipe male joint (3), the inner pipe female joint (4) and the inner pipe male joint (7) are made of alloy steel.
3. The double-threaded double-walled drill rod according to claim 1, characterized in that the outer pipe (2) is screwed to the outer pipe female joint (1) and the outer pipe male joint (3), respectively; the inner pipe (6) is in threaded connection with the inner pipe male connector (7); when two drilling rods are connected with each other, the outer pipe male joint (3) can be in threaded matching connection with the outer pipe female joint (1) of the other drilling rod, and meanwhile, the inner pipe male joint (7) can also be in threaded matching connection with the inner pipe female joint (4) of the other drilling rod.
4. The double-thread double-wall drill pipe as recited in claim 3, characterized in that the inner pipe female joint (4) and the inner pipe male joint (7) are both through pipes with two open ends, and positioning structures are arranged on the outer sides of the through pipes and fixedly connected with the outer pipe female joint (1) and the inner pipe male joint (7), respectively.
5. Double-threaded double-walled drill rod according to claim 4, characterized in that the positioning structure is three positioning claws (8) distributed uniformly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220970846.8U CN217106855U (en) | 2022-04-25 | 2022-04-25 | Double-thread double-wall drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220970846.8U CN217106855U (en) | 2022-04-25 | 2022-04-25 | Double-thread double-wall drill rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217106855U true CN217106855U (en) | 2022-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220970846.8U Active CN217106855U (en) | 2022-04-25 | 2022-04-25 | Double-thread double-wall drill rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217106855U (en) |
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2022
- 2022-04-25 CN CN202220970846.8U patent/CN217106855U/en active Active
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