绳索取芯工具是一种不提钻而从钻杆内捞取岩芯的钻井工具。整套钻具包括：钻具总成、打捞器、钻杆、绞车、提引器、夹持器及自由钳等部件。它具有钻进效率高、岩芯采取率高、钻头寿命长、劳动强度小等优点。随着钻孔的加深，其优势更为明显。

Wire-line drill tools can lift drill core from drill rods without picking up bit.All the tools include principal of the drill tools,overshot assembly,drill rods,holding dog,circle wrench and etc.Their advantages are higher penetrarion,higher core recovery ratio.Longer bit life and lower labour intensity,and the advantages get more clear with the increasing of hole depth.