| 摘要 |
A linkage device separate from the integrated slips bridge links the pair of spaced- apart members of each slip (58) to prevent sizeable fractured bits from moving away in the event of a fracture in the slip. The linkage device comprises a pair of ductile steel bars (68) the ends of which loosely anchor in holes (69) in each slip member (66), the holes being located at bothsides of the slips at opposite ends of a groove (71) that houses the linkage bar preventing it from falling out of the holes. In this way, a fractured slip may continue to assist in setting the tool and, moreover, potential hazardous interference in further tool operations are avoided. Furthermore, tool damage including slips fracture is reduced by a resilient damper material (96) which buffers the lower cone (57) as it slides down on the slip-holder cage (61) during a tool release operation. |
