| 摘要 |
A method for assembling a drilling device. A first drilling member is power transittingly, coupled with a second drilling member during drilling for rotational, feeding and/or hammering motion, and removably coupled to remove the first drilling member from a hole. A casing is pulled into the hole by power from the second drilling member transmitted through a shoulder between the casing and second drilling member. The shoulder enables independent rotation of the casing and second drilling member and restricts mutual longitudinal movement thereof. A casing shoe is fastened at an end of the casing and includes an internal or external counterpart shoulder in the radial direction of the shoulder. A separate sleeve minimizes radial expansion of an outermost structural part in the drilling device and/or kinetic energy transmitted by counterpart shoulders. Also, a drilling device. |
