Wells – Processes – With indicating – testing – measuring or locating
Patent
1993-11-01
1994-11-08
Novosad, Stephen J.
Wells
Processes
With indicating, testing, measuring or locating
73151, 166 64, 166 651, 166 664, 324221, E21B 4709, G01V 311, G01V 328
Patent
active
053618386
ABSTRACT:
An electromechanical detector structure is used to sense and log the joints in a downhole jointed tubular structure, such as a well bore casing or production tubing, in a subterranean well. The detector is lowered into the tubular structure on an elongated positioning member, representatively a slick line, through a series of joints to be logged, and then pulled upwardly through the joints. As the detector passes upwardly through each joint it electromagnetically senses the joint and responsively generates an electric output signal. The output signal is used to momentarily drive a drag structure portion of the detector into forcible, motion inhibiting contact with the interior surface of the tubular structure. This, in turn, momentarily creates a detectable tension increase in the elongated positioning member. These tension increases serve as mechanical output signals transmitted upwardly through the positioning member, and may be plotted on a strip chart recorder at the surface to record the joint locations and correlate them to the lowered depth odometer readings of the detection system. Using this electromechanical joint detection apparatus, correlative joint logging procedures may be carried out for tool setting purposes without the necessity of utilizing an electrical conductor line.
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Druce Tracy W.
Halliburton Company
Konneker J. Richard
Novosad Stephen J.
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