New and used casing Inspection

Inspection Procedure

• Visual Tube (Mechanical Optical Inspection)

The outside surface of the tube is visually examined to locate visible, injurious defects.

Magnetic Particle Inspection (MPI)

A transversely oriented magnetic field is induced into the tube and iron powder applied to its outside surface. The powder is attracted to areas of variation in the magnetic field created by longitudinal or three dimensional defects, thus outlying the defects. Depth of the defect is then determined by grinding to the point of maximum penetration and measuring with an accurate depth gauge. The tube is marked and classified as under API Spec.

MPI for Special Upset of High Strength Materials

This inspection locates injurious defects in the end areas of this material. Utilizing AC-YOKE magnetizing equipment longitudinal and transverse magnetic fields are induced into the end areas to detect defects regardless of orientation. Careful magnetic particle inspection is performed on the outside surface. Sandblasting is recommended for most sensitive inspection.

Magnaflux Inspection of End Areas

This inspection detects all defects extending to the surface and representing external damage or actual parting material inspection procedure.

1. Protectors are removed and threads cleaned if necessary.
2. Threads and shoulders are inspected magnetically and visually for cracks and other defects.
3. Small defects on the thread shoulders are removed and shoulders trimmed.
4. Threads are inspected by means of profile gauge or ring and plug gauge.
5. Threads are inspected by means of profile gauge or ring gauge
6. The joints are marked and an inspection report prepared.

API Drifting (Full Length)

Drifts according to API standards are applied to insure specified I.D. dimensions

Ultrasonic Wall Thickness Spot Test

Ultrasonic spot checks are made to determine the wall thickness along a helical path or in specified areas.

Visual Thread Inspection

1. Protectors are removed.
2. Threads are visually checked.
3. Threads are lubricated and protectors reinstalled.

Thread Inspection with API Thread Gauge

Pins and coupling are measured for compliance with API Spec.

Manual Thread Repair

1. Small imperfections are removed by means of grinding or finishing off.
2. Small imperfections on the thread shoulders are removed and shoulders trimmed.

Hardness Testing

Hardness testers are employed to determine pipe hardness

Internal Cleaning (Full Length)

Removal of scale rust and other deposits with rotary metallic brushes.

External Cleaning (Full Length)

Removal of external scale rust and other deposits with rotary metallic brushes.

Inspection After Machine Shop Repair

Dimensional inspection and Magnetic Particle Inspection performed to API Specifications of dimensions