A method and apparatus for determining the location of stuck pipe are
provided. In one embodiment, the method includes the step of attaching a
free point logging tool to a working line such as a slickline or
wireline. The free point logging tool has a freepoint sensor and,
optionally, an acoustic sensor. The freepoint sensor acquires magnetic
permeability data in a string of pipe, while the acoustic sensor acquires
acoustic data in the pipe. Two sets of data for each sensor are
acquired--one in which the pipe under investigation is unstressed, and
one in which the pipe is stressed. The first set and second sets of
magnetic permeability data are compared to determine the stuck point
location for the pipe. The first and second sets of acoustic data are
compared to determine the nature in which the pipe is stuck.