CASING INSPECTION

Key Benefits

Capabilities

Our Sonic Casing Inspection Tool   

The principle of the tool is that a narrow pulsed acoustic beam scans the inside of the casing in a tight helix as the tool moves up the hole.

To scan the casing wall, the acoustic beam generator is rotated by an electric motor.  During the rotation of the beam pulses of acoustic energy are sent towards the casing.  Acoustic energy is reflected form the casing and the amplitude and travel time of the reflected signal are measured with the same transducer that generates the acoustic beam.  The tool records 256 amplitude and travel time values per revolution,  the transducer rotates at 7 revolutions per second.  As the tool moves up the hole a detailed 360 degree image of the casing is produced.

MAGNETIC CASING INSPECTION TOOL

This tool is electro magnetic in design and uses alternating current to create a flux field that extends outside the casing. By focusing special wound coils, we are able to see any disturbance in the flux field indicating a change in casing. To calibrate the tool we use two pieces of the same size casing each being of different weight ( wall thickness ) of the casing that we are going to log, giving an accurate wall thickness along with any variations caused by pitting ( inside or out ), perforations, collars, holes and changes in pipe size or weight.

All of the processing of raw data is done in the field.

Downhole Video

Enviro-Log has acquired a new video system with two 1-11/16th  diameter tools and has 5000 feet of cable. The system has already proven itself by doing videos on  wells in three states to depths to 2900 ft. The small diameter makes it easy to run on the outside of pipe to guide fishing tools over or into a fish. By using a centralizer to center the tool in the hole and a lens that has a field of view of 88 degrees large diameter holes or casing is not a problem.

Send mail to mike-mayfield@enviro-log.com with questions or comments about this web site.