Method and apparatus for casing and directional drilling using bi-centred bit

• 1. 具有套管部件钻出能力的钻地钻头、用于所述钻地钻头的切削元件以及所述钻地钻头的使用方法 [P] . 中国专利： CN101310090A . 2008-11-19
• 2. 一种双心胎体钻头的烧结方法 [P] . 中国专利： CN114086890A . 2022-02-25
• 3. Method and apparatus for casing and directional drilling using bi-centered bit [P] . 美国专利： US2005133268A1 . 2005-06-23

  机译： 使用双心钻头进行套管定向钻井的方法和设备

• 4. Methods and apparatus for attaching a casing to a drill bit in overburden drilling equipment [P] . NO992236L . 1999-05-07

  机译： 在覆盖钻探设备中将套管附接到钻头的方法和设备

• 5. Methods and apparatus for attaching a casing to a drill bit in overburden drilling equipment [P] . 美国专利： US5839519A . 1998-11-24

  机译： 在覆盖钻探设备中将套管附接到钻头的方法和设备

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• 2. 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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