|Visual Tube Body Inspection
||A thorough visual inspection of possible
noticeable external damages inflicted is performed; most damages encountered
arise from handling of the tubing, such as major dents and mashes.
Other types of flags will be external corrosion, laps, and straightness.
Visual Inspection includes internal end area of each tube end for
service induced defects.
|Visual Thread Inspection
(API & Premium Connections)
|Thread Protectors are removed and both pin and
box ends are thoroughly cleaned and visually evaluated for any obvious
defects or mechanical damages, such as dents, corrosion, galled threads,
Premium threads are inspected to evaluate the condition of the seals,
threads and for any mechanical damages like dents, corrosion, galled
API Dope is applied to the threads and thread protectors are installed.
The dope shall be supplied by the customer.
|API Drifting (Full Length)
||Drift mandrels conforming to API Specifications
are passed through the full length of each tube to assure compliance
with API internal diameter specifications. If a mashed or dented area
prevents drift, the location is noted on the inspection report and
marked physically on the pipe.
|Special Clearance Drift – Full Length
||Special clearance drift mandrels, furnished by
the customer, are passed through the full length of each tube to determine
special clearances on the internal diameter. This is not an API inspection
and is usually performed to assure passage of special tools.
|Magnetic Particle Inspection (MPI)
||Pipe is magnetized with a DC magnetizing coil
with variable current to provide active longitudinal magnetization
for detection of transverse flaws.
|Electromagnetic Inspection (EMI)
||Buggy Inspection Unit is used for transverse defect
||Portable Hardness Testers are utilized to perform
hardness reading on the pipe.
|Wall Thickness Measurements
Ultrasonic wall thickness tests are utilized to determine the minimum
and maximum wall thickness at any one area on a tube. A test consists
of taking as many circumferential measurements as required to determine
the minimum and maximum wall thickness in one area.
Measurement: Micrometer measurements are utilized in measuring
the wall thickness on the ends of plain end pipe.
Wall Verification: Ultrasonic wall thickness test to verify
that the tube body, in general, satisfies nominal wall thickness requirements.
|API Thread Gauging
||API eight round and buttress threads are gauged
with mechanical instruments to determine compliance on taper, lead
and height. At the same time, the threads are examined for visual
|Tubing Pipe Maintenance
||Wire brushing or rattling to remove rust, scale
and other debris.
||Bent pipe is straightened using a ram type hydraulic
||A rust preventive coating is applied to maintain
the integrity of the casing.
|New casing and tubing couplings are
magnetized and magnetic particle inspected for longitudinal defects
and other flaws on the internal and external surface. Physical damage
such as cuts or mashes are noted and reported to the customer.