Linhai Wangda building machinery factory is a development, production of jacket well backfill grab drill leader, grasping Chong drilling is a drilling engineering piling machine, its structure decided not only can be used as a set of well building foundation construction pile driving machine, reservoir dam leakage of construction equipment, grab the well drilling machine, but also longhole drop good tool for salvage and pile hole cleaning.

　　　Due to grab bit closed the natural formation of a taper, under no gap, mud and gravel are encased not drain, so it is suitable for dry hole is also suitable for underwater work, lost fishing, water so it is widely used in deep drop litter salvage and bored pile hole cleaning the hole depth (Kong Shen, no limit is determined by the steel wire rope hoist capacity), diameter greater than 600MM can be used. For example in the use of impact hammer pore in the steel wire rope fracture caused by impact hammer lost in deep hole, then the bit in deep hole, drill bit in the process of falling leaves is opened automatically, bit after the pull rope, the blade is automatically closed, clamping hammer can be put in deep hole. In addition such as rotary, rotary machine wear tooth, steel pipe can be recovered, it is also known as the fishing hole cleaning special grab, grab deep hole drill bit or salvage for deep hole drill bit, underwater salvage salvage.

　Note: the user can separate purchase grab bit hanging other hoist complete salvage work, as a temporary fishing purposes, even can be hung on the crane on the salvage operation. The salvage work see instructions for use, for temporary fishing also has distribution with detailed instructions!

　The schematic as shown below: 110 bit 450mm grab grip diameter gear. (salvage something larger diameter, grab bit does not necessarily closed into a cone, and salvage gravel, mud or pile hole cleaning drill bit will be closed and not let the mud and so on outflows, only water will flow in the gaps).