CN210622728U - Wear-resistant drill rod for coal bed gas drainage - Google Patents
Wear-resistant drill rod for coal bed gas drainage Download PDFInfo
- Publication number
- CN210622728U CN210622728U CN201921647733.9U CN201921647733U CN210622728U CN 210622728 U CN210622728 U CN 210622728U CN 201921647733 U CN201921647733 U CN 201921647733U CN 210622728 U CN210622728 U CN 210622728U
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- drilling rod
- drill rod
- wear
- circular cone
- rod body
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Abstract
The utility model discloses a coal seam gas is taken out and is put and use wear-resisting drilling rod, this coal seam gas are taken out and are put and use wear-resisting drilling rod include cylindrical drilling rod body, are equipped with axial through hole at this internal drilling rod that is equipped with of drilling rod, are equipped with male joint, the other end and are equipped with female joint in drilling rod body one end, are equipped with the circular cone external screw thread on male joint, are equipped with the circular cone internal thread on female joint, are equipped with antifriction alloy permeable zone on the outer cylinder surface of drilling rod body, are equipped with corrosion-resistant alloy permeable zone on circular cone external screw thread surface and circular cone internal thread surface, antifriction alloy permeable zone is the zinc-nitrogen alloy permeable zone of thickness at 50-100 microns, corrosion-resistant alloy permeable zone is the zinc. The drill rod has the advantages of high outer cylindrical surface hardness, good wear resistance, good corrosion resistance of connecting threads and high connecting strength.
Description
Technical Field
The utility model relates to a drilling rod, especially a drilling rod that is used for coal seam gas drainage usefulness.
Background
In the process of mining the high-gas coal seam, deep holes need to be drilled in the coal seam in advance before mining, and gas in the coal seam is pumped and discharged. A drilling rod body that is used for gas drainage among the prior art is cylindricly usually, is equipped with the male joint in the one end of drilling rod, and the other end is equipped with female joint, connects the male joint and the female joint of many drilling rods in order during the use and forms long drilling rod. The drilling depth of gas pumping and discharging usually reaches dozens of meters, so the drill rod cannot be kept absolutely straight in the drilling process, the outer cylindrical surface of the drill rod positioned in the middle can generate intense friction with a rock stratum or a coal seam, the larger the drilling depth is, the more serious the abrasion of the outer cylindrical surface of the drill rod is, and the abrasion of the outer cylindrical surface of the drill rod in the using process is the main reason for influencing the service life. At present, the rod body of a drill rod for coal bed gas drainage is generally hardened and tempered alloy steel, the surface hardness of the drill rod is about HRC30, and the outer cylindrical surface of the drill rod is quickly abraded in the use process. In order to improve the wear resistance of the rod body, the drill rod is subjected to surface hardening treatment, the hardness of the thread surface of the obtained drill rod is the same whether the outer cylindrical surface of the drill rod body or the male joint and the female joint, and the connection strength between the drill rods is reduced due to the improvement of the hardness of the thread surface, so that the drilling operation is not facilitated.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is: the wear-resistant drill rod for coal bed gas drainage is high in outer cylindrical surface hardness, good in wear resistance, good in corrosion resistance of connecting threads and high in connecting strength.
The technical scheme for solving the technical problem is as follows: the utility model provides a coal seam gas drainage is with wear-resisting drilling rod, includes cylindrical drilling rod body, is equipped with axial through hole at this internal drilling rod, is equipped with male joint, the other end at drilling rod body one end and is equipped with female joint, is equipped with circular cone external screw thread on male joint, is equipped with circular cone internal thread on female joint, is equipped with antifriction alloy infiltration layer on the outer cylinder surface of drilling rod body, is equipped with corrosion-resistant alloy infiltration layer on circular cone external screw thread surface and circular cone internal thread surface.
As the improvement of the utility model: the antifriction alloy diffusion layer is a zinc-nitrogen alloy diffusion layer with the thickness of 50-100 microns.
As a further improvement of the utility model: the corrosion-resistant alloy infiltration layer is a zinc-iron alloy infiltration layer with the thickness of 30-50 microns.
Has the advantages that: the wear-resistant drill rod for coal bed gas drainage of the utility model comprises a cylindrical drill rod body, an axial through hole is arranged in the drill rod body, a male joint is arranged at one end of the drill rod body, a female joint is arranged at the other end of the drill rod body, a conical external thread is arranged on the male joint, a conical internal thread is arranged on the female joint, an antifriction alloy infiltration layer is arranged on the outer cylindrical surface of the drill rod body, the technical proposal that the surface of the conical external thread and the surface of the conical internal thread are provided with corrosion-resistant alloy infiltration layers, by arranging alloy infiltration layers with different characteristics on the outer cylindrical surface of the drill rod body and the joint thread, the hardness and the wear resistance of the outer cylindrical surface of the drill rod body are improved, the connection strength of the joint threads is not influenced, and the corrosion resistance of the joint thread is further improved, so that the service life of the drill rod is prolonged on the premise of not changing the original specification of the drill rod. Because the technical characteristic that the antifriction alloy diffusion layer is a zinc-nitrogen alloy diffusion layer with the thickness of 50-100 microns is adopted, the strength of the outer cylindrical surface of the drill rod is increased, and the nitrogen element can enable the outer cylindrical surface of the drill rod to have good self-lubricating property, so that the antifriction alloy diffusion layer has better abrasion resistance and smaller working resistance during drilling. Due to the technical characteristic that the corrosion-resistant alloy infiltration layer is a zinc-iron alloy infiltration layer with the thickness of 30-50 microns, the corrosion resistance of the threaded part of the joint is further improved, so that the drill rod is more convenient to assemble and disassemble, better in connection strength and longer in service life.
Drawings
The wear-resistant drill rod for coal bed gas drainage of the present invention will be further described in detail with reference to the accompanying drawings.
FIG. 1 is the axial section structure diagram of the abrasion-resistant drill rod for coal bed gas drainage of the present invention.
Detailed Description
As shown in fig. 1, the utility model discloses a wear-resisting drilling rod is used in drainage of coal seam gas, including cylindrical drilling rod body 1, this internal axial through hole 4 that is equipped with of drilling rod is equipped with male joint 3, the other end in drilling rod body one end and is equipped with female joint 2, is equipped with circular cone external screw thread 31 on male joint, is equipped with circular cone internal thread 21 on female joint, is equipped with antifriction alloy infiltration layer 11 on the outer cylinder surface of drilling rod body, antifriction alloy infiltration layer is the zinc-nitrogen alloy infiltration layer of thickness at 50-100 microns. And corrosion-resistant alloy infiltration layers (32, 22) are arranged on the surface of the conical external thread and the surface of the conical internal thread, and the corrosion-resistant alloy infiltration layers are zinc-iron alloy infiltration layers with the thickness of 30-50 micrometers.
The utility model discloses a coal seam gas is taken out and is put with wear-resisting drilling rod forms different alloy permeable beds respectively on the outer cylinder surface of drilling rod and screw thread surface, and the permeable bed of drilling rod surface is wear-resisting, antifriction alloy composition, the utility model discloses a coal seam gas is taken out and is put with wear-resisting drilling rod body of rod outer cylinder surface hardness can reach HV 350-1000, and the internal and external screw thread section of drilling rod is corrosion-resistant, antifriction alloy composition permeable bed, and the different permeable bed drilling rods can guarantee that the wear resistance of the body of rod compromises the joint strength of screw thread simultaneously.
The utility model discloses a coal seam gas drainage is with wear-resisting drilling rod is because only increase the permeable stratum and do not change the size specification than ordinary drilling rod, consequently, can conveniently upgrade and reform transform current coal seam gas drainage is with wear-resisting drilling rod, and upgrade and reform transform can not influence coal seam gas drainage and use wear-resisting drilling rod and the rig among the prior art, drill bit supporting.
Claims (3)
1. The utility model provides a coal seam gas drainage is with wear-resisting drilling rod, includes cylindrical drilling rod body, is equipped with axial through hole at this internal drilling rod, is equipped with male joint, the other end at drilling rod body one end and is equipped with female joint, is equipped with circular cone external screw thread on male joint, is equipped with circular cone internal thread on female joint, characterized by: an antifriction alloy infiltration layer is arranged on the outer cylindrical surface of the drill rod body, and corrosion-resistant alloy infiltration layers are arranged on the outer conical thread surface and the inner conical thread surface.
2. The wear-resistant drill rod for coal seam gas drainage of claim 1, which is characterized in that: the antifriction alloy diffusion layer is a zinc-nitrogen alloy diffusion layer with the thickness of 50-100 microns.
3. The abrasion-resistant drill rod for coal bed gas drainage according to claim 1 or 2, which is characterized in that: the corrosion-resistant alloy infiltration layer is a zinc-iron alloy infiltration layer with the thickness of 30-50 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921647733.9U CN210622728U (en) | 2019-09-30 | 2019-09-30 | Wear-resistant drill rod for coal bed gas drainage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921647733.9U CN210622728U (en) | 2019-09-30 | 2019-09-30 | Wear-resistant drill rod for coal bed gas drainage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210622728U true CN210622728U (en) | 2020-05-26 |
Family
ID=70751436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921647733.9U Expired - Fee Related CN210622728U (en) | 2019-09-30 | 2019-09-30 | Wear-resistant drill rod for coal bed gas drainage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210622728U (en) |
-
2019
- 2019-09-30 CN CN201921647733.9U patent/CN210622728U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200526 Termination date: 20210930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |