A caliper-arm-position sensor comprising a differential variable reluctance transducer (DVRT) and circuits to drive the DVRT with a substantially sinusoidal signal and to sample a signal at the DVRT once per drive-signal cycle at a predetermined position in the drive-signal cycle is disclosed.

A caliper-arm-position sensor comprising a differential variable reluctance transducer (DVRT) and circuits to drive the DVRT with a substantially sinusoidal signal and to sample a signal at the DVRT once per drive-signal cycle at a predetermined position in the drive-signal cycle is disclosed.

A downhole packer system includes a swellable material configured to expand to seal against a wellbore wall in response to exposure to downhole fluids. The downhole packer system also includes at least one sensor disposed proximate the swellable material. The at least one sensor is configured to measure one or more electrical properties of the swellable material to determine a degree of expansion of the swellable material.

A downhole packer system includes a swellable material configured to expand to seal against a wellbore wall in response to exposure to downhole fluids. The downhole packer system also includes at least one sensor disposed proximate the swellable material. The at least one sensor is configured to measure one or more electrical properties of the swellable material to determine a degree of expansion of the swellable material.

A computer-implemented method includes receiving a plurality of sensor signals, each signal of the plurality of sensor signals being tagged with an associated time and depth. The method also includes selecting a baseline signal. The method further includes comparing a selected sensor signal, of the plurality of sensor signals, to the baseline signal. The method also includes determining a difference between the baseline signal and the selected sensor signal exceeds a threshold. The method includes identifying, based at least in part on the difference, a feature of interest associated with the selected sensor signal.

A computer-implemented method includes receiving a plurality of sensor signals, each signal of the plurality of sensor signals being tagged with an associated time and depth. The method also includes selecting a baseline signal. The method further includes comparing a selected sensor signal, of the plurality of sensor signals, to the baseline signal. The method also includes determining a difference between the baseline signal and the selected sensor signal exceeds a threshold. The method includes identifying, based at least in part on the difference, a feature of interest associated with the selected sensor signal.

Disclosed herein is a system including a wellsite controller. The wellsite controller receives workflow inputs such as wellsite details and communications settings, generates a local configuration entry including the workflow inputs, sensor configuration information about wellsite sensors connected to the controller, and a unique identifier for the controller. The unique identifier is based upon the workflow inputs, the sensor configuration information, and location information for the wellsite. The controller generates a registration message from the local configuration entry. A server receives the registration message, and compares the unique identifier to a store of known identifiers. If the unique identifier does not match one of the known identifiers, the server recognizes the controller as being newly added, adds the wellsite to a monitoring system of the server by creating an entry for the wellsite from the registration message, and attempts to map the wellsite sensors to the entry for the wellsite.

Disclosed herein is a system including a wellsite controller. The wellsite controller receives workflow inputs such as wellsite details and communications settings, generates a local configuration entry including the workflow inputs, sensor configuration information about wellsite sensors connected to the controller, and a unique identifier for the controller. The unique identifier is based upon the workflow inputs, the sensor configuration information, and location information for the wellsite. The controller generates a registration message from the local configuration entry. A server receives the registration message, and compares the unique identifier to a store of known identifiers. If the unique identifier does not match one of the known identifiers, the server recognizes the controller as being newly added, adds the wellsite to a monitoring system of the server by creating an entry for the wellsite from the registration message, and attempts to map the wellsite sensors to the entry for the wellsite.

Techniques according to the present disclosure include moving an untethered downhole tool through a wellbore between a terranean surface and a particular depth in the wellbore; during the moving the untethered downhole tool through the wellbore, acquiring a set of sensed data from one or more sensors in the untethered downhole tool in a time domain; transforming the plurality of data values associated with the wellbore parameter in the time-domain into a plurality of data values associated with the wellbore parameter in a depth-domain based at least in part on at least one accelerometer output and the locations of a plurality of casing collars; and preparing the plurality of data values associated with the wellbore parameter in the depth-domain for presentation on a graphical user interface (GUI).

The present disclosure introduces an apparatus including a toolstring for use in a tubular extending into a subterranean formation. The toolstring includes modular components that include one or more caliper modules and a power and control (P/C) module. The one or more caliper modules each include radially rotatable fingers for sensing an internal diameter of the tubular. The P/C module is operable for distributing power and control signals to the one or more caliper modules. The caliper and P/C modules are mechanically and electrically interconnected by common lower interfaces of the caliper and P/C modules.