Patent ID: 7526930

Claim:
A method, practiced in a computer system, of determining a depth of an object of interest in a borehole at a particular time, the computer system including: a processor that is responsive to input data; a recorder or display device; and a memory storing executable instructions, the method comprising: executing, by the processor, the instructions stored in the memory of the computer system in response to said input data; recording or displaying on the recorder or display device an output display including a time log having a plurality of times and a time line; and a depth log having a plurality of depths and the object of interest; moving said time log relative to said time line, said time line identifying said particular time among the plurality of times on the time log; moving said depth log relative to said object of interest in synchronism with the movement of the time log relative to the time line; and determining one of the plurality of depths on the depth log, which is located adjacent to the object of interest when the time line identifies said particular time on the time log, and thereby determining said one of the plurality of depths on the depth log representing said depth of the object of interest in the borehole at said particular time.