Patent ID: 6695078
Filing Date: 2004-02-24
Classification: E21B

Abstract:
A cutting apparatus for use in a sampler, wherein the sampler has an outer tube with a bit for excavating a ground, a protecting tube for protecting a sample from a disturbance generated by a rotating excavation of the bit, a sampling tube for containing a sample and an up-lifting rod for up-lifting the sampling tube and the protecting tube, comprising:an extension tube which is internally equipped within the protecting tube and having a round unit on a bottom side of the extension tube, which is rounded; a cutting ring located in a bottom portion of the protecting tube in a cylindrical form; a guide tube which is internally equipped within the cutting ring; a plurality of cutters connected to an outside of the cutting ring within a predetermined interval for closing a bottom portion of the sampling tube when the cutting ring is pulled by uplifting the up-lifting rod of the sampler, wherein the plurality of the cutters are uplifted followed by the guide tube and bended according to the round unit in order to be gathered and closed; and a connection means for fixing a plurality of the cutters on the cutting ring.