Core Bit Having a Spiral-Tube-Shaped Drill Shaft, and Method for Producing a Spiral-Tube-Shaped Drill Shaft for a Core Bit

• 1. 具有螺旋管状的钻杆的钻头和用于制造用于钻头的螺旋管状的钻杆的方法 [P] . 中国专利： CN110035854B . 2020.09.15
• 2. 具有螺旋管状的钻杆的钻头和用于制造用于钻头的螺旋管状的钻杆的方法 [P] . 中国专利： CN110035853A . 2019-07-19
• 3. DRILL BIT HAVING A SPIRAL-TUBE-SHAPED DRILL SHAFT AND METHOD FOR PRODUCING A SPIRAL-TUBE-SHAPED DRILL SHAFT FOR A DRILL BIT [P] . 欧洲知识产权局专利： EP3558574A1 . 2019-10-30

  机译： 具有螺旋形钻头的钻头和用于制造钻头的螺旋形钻头的方法

• 4. Drill Bit Having a Spiral-Tube-Shaped Drill Shaft and Method for Producing a Spiral-Tube-Shaped Drill Shaft for a Drill Bit [P] . 美国专利： US2019366451A1 . 2019-12-05

  机译： 具有螺旋管形钻杆的钻头以及用于生产钻头的螺旋管形钻杆的方法

• 5. DRILL BIT HAVING A SPIRAL-TUBE-SHAPED DRILL SHAFT AND METHOD FOR PRODUCING A SPIRAL-TUBE-SHAPED DRILL SHAFT FOR A DRILL BIT [P] . 世界知识产权组织专利： WO2018114240A1 . 2018-06-28

  机译： 具有螺旋形钻头的钻头和用于制造钻头的螺旋形钻头的方法

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• 1. Microstructure and properties of composites gun drill bit/drill pipe interface produced by 3D printing method [J] . 赵菲 ,王康 ,段宣政 . 中国焊接:英文版 . 2021,第4期
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