"Domestic Substitution" of Parts for Second-hand Rotary Drilling RIGS: Which Parts Can Be Replaced with Domestic Ones?

  Second-hand rotary drilling RIGS, due to their long service life and high frequency of parts replacement, often face problems such as high prices and delayed supply of imported parts. With the upgrading of domestic manufacturing technology, many components have achieved reliable domestic substitution, which can not only reduce maintenance costs but also ensure construction efficiency.

Improvement in drill pipe technology

         Drill pipes and accessory components: Through structural optimization and process improvement, domestic drill pipes can make up for material tolerance defects, and their quality can now meet the usage requirements. Its wear-resistant blocks, welded square heads and other vulnerable parts are designed in a modular way, and the replacement cost is only about 50% of that of imported parts.

Drill bit and hydraulic device

      Wear-resistant parts for drill bits: The alloy teeth of conical and helical drill bits, as well as the tool holders of hob drill bits, can all be replaced with domestic parts. The price of a single domestic alloy tooth is 150 to 400 yuan, which is only half that of imported parts. When there is mild wear, domestic surfacing materials can also meet the repair requirements.

        Hydraulic rotary devices: The products of Ningbo Telems, Bangli and other enterprises have been able to replace brands such as German Rexroth and Italian Brevini. Its integrated hydraulic rotary device has a transmission efficiency of 92% and is compatible with mainstream drilling rig models.

Conventional hydraulic components

         The domestic production of basic hydraulic components such as gear pumps and hydraulic cylinders is mature, and the products of leading enterprises have passed the load sensitive system adaptation verification. Compared with imported parts, the delivery cycle of domestic hydraulic components is shortened by more than 70%.

Brake system accessories

         The friction plates, seals and other vulnerable parts of the sheet wet brake can be fully replaced. Domestic parts are made of highly wear-resistant materials and have a service life of over 10,000 hours. The maintenance and replacement cost has been reduced by 60%.

Electrical auxiliary components

       For auxiliary electrical components such as instrument panels and sensors in the operation room, domestic products have no shortcomings in terms of compatibility. And it can be compatible with the demands of intelligent upgrades, with a significantly better cost performance than imported components.

        In conclusion, the vulnerable parts, basic hydraulic components, electrical auxiliary parts and other components of second-hand rotary drilling RIGS have achieved mature domestic substitution, and the domestic products of core transmission components also have a relatively high cost performance. When making a choice, priority can be given to products from leading enterprises. This ensures the reliability of equipment while controlling costs and provides support for extending the service life of second-hand equipment.