product description
The central cable drill pipe is mainly used for 1000-meter directional drilling rigs for deep hole directional drilling. It is an important tool for directional drilling and geologically controlled drilling in underground coal mines. effect.
The drill pipe manufacturing process is divided into joint thickening integrated type and friction welding type. The joint adopts special heat treatment process and has high strength and hardness. The drill pipe body is produced by API standard G105 and S135 oil pipe, which is quenched and tempered as a whole to increase the service life.
The cable joint is custom-made with imported PPR (100) grade new raw materials, with high mold precision, and the sealing effect is higher than that of the same kind. The communication cable is an imported special conductor copper alloy cable, which is suitable for use in various extreme environments.
Product applicable functions:
The center cable drill pipe is required to be constructed in complete coal seam (F≥1) or stable rock layer (F≤6). It is mainly used in the construction of near-horizontal and long-distance gas drainage drilling, water exploration and drainage drilling in coal mines, gas layer development, emergency rescue, detection and discharge of water accumulation in goaf and geological structure, etc.
detailed drawing
technical parameter
| Technical parameters of central cable drill pipe |
| No. |
Diameter |
Length |
water pressure |
Insulation resistance |
Conductor resistance |
Drill pipe helix |
steel grade |
| 1 |
Φ70mm |
1.5-3m |
7-10Mpa |
≥500MΩ |
0.5-1.5Ω |
Outer flat
Body Milling Pin Type |
G105,S135 |
| 2 |
Φ73mm |
1.5-3m |
7-10Mpa |
≥500MΩ |
0.5-1.5Ω |
G105,S135 |
| 3 |
Φ76mm |
1.5-3m |
7-10Mpa |
≥500MΩ |
0.5-1.5Ω |
G105,S135 |
| 4 |
Φ89mm |
1.5-3m |
7-10Mpa |
≥500MΩ |
0.5-1.5Ω |
G105,S135 |
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