Abstract: In accordance with aspects of the present invention, a method of inspecting a well tubular is disclosed. The method utilizes a probe with a transmitter and detectors spaced from the transmitter by at least twice the diameter of the pipe to be tested. In some cases where multi-tubular structures are tested, the probe can include further detectors spaced from the transmitter by at least twice the diameter of the outer pipes as well. The phase of signals detected by the detectors relative to the transmitter are utilized to detect faults in the pipes.

Abstract: In accordance with aspects of the present invention, a method of inspecting a well tubular is disclosed. The method utilizes a probe with a transmitter and detectors spaced from the transmitter by at least twice the diameter of the pipe to be tested. In some cases where multi-tubular structures are tested, the probe can include further detectors spaced from the transmitter by at least twice the diameter of the outer pipes as well. The phase of signals detected by the detectors relative to the transmitter are utilized to detect faults in the pipes.

Abstract: A perforating system includes a casing collar locator. The casing collar locator includes a coil. The perforating system includes a plurality of perforation charge elements. Each perforation charge element is in a circuit parallel to the coil. The perforating system includes a transient voltage suppressor in a circuit parallel to the coil.

Abstract: A system for perforating a well includes a plurality of perforating guns suspended in the well from the wireline or coiled tubing. A downhole electronic command circuit is provided for firing each of the guns in response to a command signal from the surface. A conductor cable, which may be the wireline, extends from the surface to the downhole command circuit, such that command signals fire the guns in a selected order.