A method and device for inspecting marine risers is described. The marine riser is deployed from a floating unit and connected to a lower marine riser package (LMRP) and a blow-out prevention (BOP) stack, and the method comprises: performing a first riser inspection with an inspection tool where the marine riser is in an unconnected well configuration, wherein the inspection tool includes an ultrasonic transducer device, and the first riser inspection comprises: conveying the inspection tool in an internal diameter of the marine riser, detecting information on the marine riser with the inspection tool while conveying the inspection tool through the marine riser, and collecting data with the inspection tool corresponding to the information detected by the inspection tool.

A system, device and method for imaging, measuring and identifying surface features in a tubular, such as a casing, wellbore, or pipe. The device comprises an ultrasound transducer for sonifying an area of the surface of the tubular, with a pulse intercepting axial locations of the sonified area at different times. Reflected signals are processed using their time of flight to interpret the reflected signals as axial locations of features on the surface of the tubular. Multiple sonified areas are partially overlapped in the axial direction to capture features redundantly. Reflections from the multiple areas are combined to remove noise and strengthen reflections from real features. A geometric model of the surface of the tubular is rendered and displayed. Capturing larger areas per frame increases the logging rate and oversampling improves the resolution and signal to noise ratio.

Systems and methods are provided for obtaining a flexural-attenuation measurement for cement evaluation that may be effective even for wells with relatively thick casings. A method includes emitting an acoustic signal at a casing in a well that excites the casing into generating an acoustic response signal containing acoustic waves, such as Lamb waves. The Lamb waves include flexural waves and extensional waves. The casing may be relatively large, having a thickness of at least 16 mm. The acoustic response signal may be detected and filtered to reduce a relative contribution of the extensional waves. This may correspondingly increase a relative contribution of the flexural waves. The filtered acoustic response signal may be used as a flexural-attenuation measurement for cement evaluation.

A scanning device is provided. The scanning device includes a frame having a first portion and a second portion pivotably coupled to the first frame portion. The scanning device also has a first set of wheels coupled with the first frame portion and a second set of wheels coupled with the second frame portion. In addition, the scanning device has a rail movably disposed on the first frame portion that includes a channel and a rail along with a rail arm coupled with the channel. The scanning device has a sensor assembly that includes sensor forks, a sensor coupled with the sensor forks and a sensor arm. The sensor arm is coupled with the sensor forks and with the rail arm. In addition, the sensor is adjustable between a first position and a second position via the rail.

The invention is embodied in a crawler that measures alignment, distance, grade, and vertical deflection of underground conduits (pipelines). The crawler drives through the conduit and collects data that can be used to inspect and evaluate whether the construction meets the grade and alignment according to the construction documents and specifications and spot locations of culvert deflections from material defect and/or bedding deficiencies.

The preferred crawler can be moved into and out of a conduit via remote control. The preferred crawler comprises a deck for carrying electronic sensors, a battery, and other devices. A computer located on the deck communicates with the electronic sensors and the other devices. Most importantly, the preferred crawler comprises at least one wheel that rides on the invert of the conduit. The guide wheel is a key element of the invention because having at least one wheel ride on the invert provides a referential location for other measurements.

There is provided an untethered, single-bodied pig for inspecting a tubular object. The pig comprises: a plurality of transducer casings (3), each transducer casing (3) including an electrical terminal (13); a plurality of transducers for detecting a condition of the tubular object, each transducer mounted on or in a respective one of the plurality of transducer casings (3); a transducer body defining a plurality of receptacles (12), each transducer casing (3) removably received in a respective one of the plurality of receptacles (12); and a plurality of compressible electrical connectors (14), each compressible electrical connector (14) at least partially arranged inside a respective one of the plurality of receptables (12), wherein each compressible electrical connector (14) is configured to be in electrical contact with the electrical terminal (13) of the transducer casing (3) received in the corresponding receptacle (12).

Examples of determining tuberculation in a fluid distribution system are disclosed. In one example implementation according to aspects of the present disclosure, an acoustical wave generator generates an acoustical wave within a fluid path of a fluid distribution system. A first acoustical sensor and a second acoustical sensor sense the acoustical wave. An acoustical signal analysis module determines an amount of tuberculation within the fluid distribution system by analyzing the sensed acoustical wave.

An apparatus for inspecting a well having nested multi-tubular structure, includes: an acoustic transducer conveyed in an inner-most tubular in the structure and configured to receive a return acoustic signal having a plurality of resonances due to the structure; an acoustic impedance matching material disposed on a sensing face of the acoustic transducer; a signal generator that generates a signal having a plurality of frequencies to drive the acoustic transducer; a signal shaper that modifies the signal to provide a drive signal to the acoustic transducer; and a processor configured to determine an annulus distance of any tubular in the structure with respect to an adjacent tubular using a time of flight of a transmitted acoustic signal, an acoustic speed in a component in the nested multi-tubular structure using the annulus distance and the plurality of resonances, and a characteristic of the component that corresponds with the acoustic speed.

A contactless odometer system can include a sensor array. The sensor array can include a plurality of sensing elements adjacent to a target surface and configured to receive signals based on a distance separating the sensing element from the adjacent surface and a defect present below the adjacent surface of the target. The system can also include a controller configured to receive the signals from first and second locations within the target and to generate first and second defect maps corresponding to the first and second locations. The controller can identify overlapping portions of first and second defect maps and can determine a translation distance in at least one direction. Related methods of determining a distance traveled by a contactless odometer system are also provided.

A method and system for cement evaluation. The method may include disposing an acoustic logging tool into a pipe string that is disposed in a first casing of a wellbore, transmitting an acoustic wave at a first location within the wellbore from an acoustic source disposed on the acoustic logging tool, and recording one or more acoustic signals with one or more receivers on the acoustic logging tool at the first location. The method may further include performing a multichannel multimode dispersion analysis of the one or more acoustic signals, extracting one or more fluid modes propagating in the first casing from the dispersion analysis, extracting one or more pseudo-lamb waves propagating in the first casing from the dispersion analysis, extracting one or more pseudo-SH-plate waves propagating in the first casing from the dispersion analysis, and identifying a bonding condition between the first casing and a cement.