With maximum thread strength and Valley Longwall's innovative lightweight thin-walled rod body, Valley Longwall's DDR 71 drill rods will expand your drilling capabilities while reducing your costs in all surface conditions.

Valley Longwall uses a unique forging technology to produce DDR71 Rods, eliminating the risk of welding cracks and possible failures.

The DDR71 rod is rated for 3,000 meters and features a unique forging, heat treatment process and coarse thread design to provide maximum pull-back torque with lower torque. Thread yield increased to 11,224 Nm.

DDR 71 threads have larger, deeper coarse threads providing maximum durability and pullback as well as lower make-up torque.

The DDR 71 is manufactured with a case-hardened pin thread. The result is a rod that has more than twice the thread life of competitor products.

High Thread Strength: The drill pipe joints feature high-strength threads with increased tooth height, providing excellent anti-galling performance and ensuring a more reliable connection.

Superior Tensile Performance: By increasing the thread pitch and length (2.5 threads per inch, 50.8mm thread length), the tensile capacity is significantly enhanced, making it suitable for high-intensity operating environments.

Excellent Mechanical Properties: The drill pipe body is manufactured using a friction welding process, which results in a more stable structure, superior mechanical performance, and an extended service life.

Real-Time Signal Transmission: Equipped with an internal signal transmission device, the drill pipe enables bidirectional real-time communication between the downhole measurement probe and the surface explosion-proof computer, ensuring high efficiency and data precision.

High Sealing & Stability: The internal joints offer exceptional sealing performance and maintain high stability during drilling, effectively reducing the frequency of equipment failures.

Superior Flexibility & Adaptability: With outstanding flexibility, this drill pipe is specifically designed to adapt to complex conditions such as long-distance directional drilling.

Lightweight Design: The overall lightweight construction effectively reduces labor intensity for operators while minimizing the risk of safety accidents.