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Downhole Drill Pipe

  •  Drill rods for water well
  •  Pin type sub saver for water well drilling
  •  Box sub saver for DHT drill
Features of DHT Drill Pipe

Caston manufactures DHT drill pipe with friction welding technique. The joints are given forging, and quenching and tempering treatment. Our drill pipes are fabricated from oil pipes in conformity with API standards, with the 2 pipe ends given internal thickening and heat treatment, which contributes to a steel grade of S135. Featured by high impact strength, and excellent mechanical performance, Caston DHT drill pipe is applicable in mining and water well drilling. It incorporates drill pipe and auxiliary casings.

Drill Pipe Specification
Dimension Thread Steel Width of square buckle (mm ) Size of square buckle (mm ) Weight (kg)
76mm×5.5mm×3m 2-3/8REG N80 57 45 33
76mm×4mm×3m 2-3/8REG S135 57 45 26
89mm×6.5mm×3m 2-3/8REG N80 65 45 47
Features of Casings

In drilling operation, casings work to protect the wall and reduce the straightness deviation. Casings with different length and diameter are prepared for different drill rigs. They are made from seamless steel pipes. For thread processing, pipes with thin wall should firstly be upset in the ends, and pipes with thick wall can be processed directly. The tubing joint generally comes with arc shape. It is also customizable upon clients' needs.

Casing Specification
Outer diameter (mm) Inner diameter (mm) Wall thickness (mm) Length (mm) Weight (mm) Length (mm) Weight (mm) Length (mm) Weight (mm)
108 93 7.5 1000 17 1500 26 2000 34
114 101 6.5 1000 16 1500 25 2000 32
127 114 6.5 1000 18 1500 28 2000 36
146 127 9.5 1000 30 1500 45 2000 60
168 149 9.5 1000 35 1500 53 2000 70
178 159 9.5 1000 38 1500 56 2000 70
193 173 10 1000 43 1500 65 2000 86
203 183 10 1000 46 1500 69 2000 92
244 224 10 1000 56 1500 84 2000 112
273 251 11 1000 69 1500 103 2000 138
323 301 11 1000 82 1500 124 2000 164
406 382 12 1000 114 1500 171 2000 228
457 433 12 1000 129 1500 194 2000 258
508 483 12.5 1000 150 1500 226 2000 300

Remark: casings are customizable upon clients' request

Among the downhole drilling tools, we offer downhole drill pipe and other drill rig accessories, including oil drilling tools, exploration drilling tools, geothermal drilling tools, building construction drilling tools, heavy engineering drilling tools, etc. Fully equipped with drill pipe production lines and other process equipment, as each detail is checked during manufacturing, we can provide quality downhole drill pipe and other drilling tools for global customers.

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