Abstract: System and methods for encoding downhole image data are provided. Measurements collected by a downhole tool around a circumference of a borehole drilled within a formation are obtained. The acquired measurements are assigned to a plurality of azimuthal bins. Each azimuthal bin corresponds to an angular sector around the circumference of the borehole in which at least one of the measurements was collected by the downhole tool at a predetermined depth within the formation. At least one of a plurality of delta encoding schemes is selected for encoding the measurements assigned to the plurality of azimuthal bins. A delta-encoded binary representation of the measurements assigned to the plurality of bins is generated, based on the selected delta encoding scheme. The generated delta-encoded binary representation is transmitted from the downhole computing device to a surface computing device located at the surface of the borehole.

Abstract: System and methods for encoding downhole image data are provided. Measurements collected by a downhole tool around a circumference of a borehole drilled within a formation are obtained. The acquired measurements are assigned to a plurality of azimuthal bins. Each azimuthal bin corresponds to an angular sector around the circumference of the borehole in which at least one of the measurements was collected by the downhole tool at a predetermined depth within the formation. At least one of a plurality of delta encoding schemes is selected for encoding the measurements assigned to the plurality of azimuthal bins. A delta-encoded binary representation of the measurements assigned to the plurality of bins is generated, based on the selected delta encoding scheme. The generated delta-encoded binary representation is transmitted from the downhole computing device to a surface computing device located at the surface of the borehole.

Abstract: Mud pulse telemetry. The various embodiments are directed to methods and systems of encoding data in a mud pulse telemetry system, where at least a portion of the data is encoded the time between pressure transitions. Moreover, the various embodiments are directed to detection methods and systems that detect the pressure transitions at the surface.

Abstract: A system having a downhole sensor device and a compression device to obtain a sparse representation of data in downhole telemetry applications is described. The downhole sensor device can collect sensor data while the downhole sensor device is within a borehole. The compression device is coupled to the downhole sensor device and configured to receive the sensor data. The compression device can determine a wavelet coefficient vector for at least one row of n-tuple vectors. The wavelet coefficient vector can have a sparse representation of one or more nonzero elements. The compression device can process the wavelet coefficient vector through a set of compression algorithms, and determine a minimal bit cost of the processed wavelet coefficient vector. The compression device can select a compression algorithm from the set of compression algorithms corresponding to the minimal bit cost. The compression device can generate compressed data based on the selected compression algorithm.

Abstract: An example mud pulse telemetry method includes positioning an external acoustic or vibration sensor on or near a pump to collect acoustic or vibration data during operation of the pump. The method also includes monitoring a pressure of fluid in a tubular, the fluid conveying a data stream as a series of pressure variations. The method also comprises processing the monitored pressure to demodulate the data stream. The processing uses a pump noise estimate obtained at least in part from analysis of the acoustic or vibration data.

Abstract: Embodiments of systems and methods for classification and storage of acquired well data according to the invention are disclosed. In one embodiment of the invention a system for handling information generally includes, but is not limited to, a sensor associated with a well and a memory coupled to receive data from the sensor and store the data. The system also includes a processor programmed to read data identified as active from the memory and programmed to read other data from an electronic storage, where the memory is capable of being read at higher speed than the electronic storage.

Abstract: Mud pulse telemetry. The various embodiments are directed to methods and systems of encoding data in a mud pulse telemetry system, where at least a portion of the data is encoded the time between pressure transitions. Moreover, the various embodiments are directed to detection methods and systems that detect the pressure transitions at the surface.

Abstract: A system having a downhole sensor device and a compression device to obtain a sparse representation of data in downhole telemetry applications is described. The downhole sensor device can collect sensor data while the downhole sensor device is within a borehole. The compression device is coupled to the downhole sensor device and configured to receive the sensor data. The compression device can determine a wavelet coefficient vector for at least one row of n-tuple vectors. The wavelet coefficient vector can have a sparse representation of one or more nonzero elements. The compression device can process the wavelet coefficient vector through a set of compression algorithms, and determine a minimal bit cost of the processed wavelet coefficient vector. The compression device can select a compression algorithm from the set of compression algorithms corresponding to the minimal bit cost. The compression device can generate compressed data based on the selected compression algorithm.

Abstract: Mud pulse telemetry. The various embodiments are directed to methods and systems of encoding data in a mud pulse telemetry system, where at least a portion of the data is encoded the time between pressure transitions. Moreover, the various embodiments are directed to detection methods and systems that detect the pressure transitions at the surface.

Abstract: Mud pulse telemetry. The various embodiments are directed to methods and systems of encoding data in a mud pulse telemetry system, where at least a portion of the data is encoded the time between pressure transitions. Moreover, the various embodiments are directed to detection methods and systems that detect the pressure transitions at the surface.

Abstract: Mud pulse telemetry. The various embodiments are directed to methods and systems of encoding data in a mud pulse telemetry system, where at least a portion of the data is encoded the time between pressure transitions. Moreover, the various embodiments are directed to detection methods and systems that detect the pressure transitions at the surface.

Abstract: A plurality of inputs from an oil field system is monitored. It is determined that a failure in the oil field system has occurred. In response, a mechanical release mechanism to release an apparatus is triggered. A remote signal is provided to report a subset of the inputs to a remote location as the processor is monitoring the signal inputs. A memory stores the inputs. An output is provided through which the stored inputs can be extracted to analyze the failure in the oil field system.

Abstract: Mud pulse telemetry. The various embodiments are directed to methods and systems of encoding data in a mud pulse telemetry system, where at least a portion of the data is encoded the time between pressure transitions. Moreover, the various embodiments are directed to detection methods and systems that detect the pressure transitions at the surface.

Abstract: This application relates to various methods and apparatus for rapidly obtaining accurate formation property data from a drilled earthen borehole. Quickly obtaining accurate formation property data, including formation fluid pressure, is vital to beneficially describing the various formations being intersected. For example, methods are disclosed for collecting numerous property values with a minimum of downhole tools, correcting and calibrating downhole measurements and sensors, and developing complete formation predictors and models by acquiring a diverse set of direct formation measurements, such as formation fluid pressure and temperature. Also disclosed are various methods of using of accurately and quickly obtained formation property data.

Abstract: The specification discloses systems and methods that provide improved capability to detect and decode encoded telemetry data. More particularly, the specification discloses embodiments for detecting and decoding telemetry data by receiving a plurality of waveforms comprising encoded telemetry data. A first set of outputs is detected from the encoded telemetry data using a first set of filtering and detection parameters, and a second set of outputs is detected substantially concurrently from the encoded telemetry data using a second set of filtering and detection parameters. The sets of outputs are merged to produce decoded telemetry data.

Abstract: This application relates to various methods and apparatus for rapidly obtaining accurate formation property data from a drilled earthen borehole. Quickly obtaining accurate formation property data, including formation fluid pressure, is vital to beneficially describing the various formations being intersected. For example, methods are disclosed for collecting numerous property values with a minimum of downhole tools, correcting and calibrating downhole measurements and sensors, and developing complete formation predictors and models by acquiring a diverse set of direct formation measurements, such as formation fluid pressure and temperature. Also disclosed are various methods of using of accurately and quickly obtained formation property data.

Abstract: A method and system of reducing logging data for log analysis applications. Some embodiments may be a method comprising sending a request for logging data from a log analysis application to a repository of logging data gathered by a logging device, and sending a reply comprising a reduced representation of at least some of the logging data.

Abstract: A method of testing a downhole formation using a formation tester on a drill string. The formation tester is disposed downhole on a drill string and a formation test is performed by forming a seal between a formation probe assembly and the formation. A drawdown piston then creates a volume within a cylinder to draw formation fluid into the volume through the probe assembly. The pressure of the fluid within the cylinder is monitored. The formation test procedure may then be adjusted. The test procedure may be adjusted to account for the bubble point pressure of the fluid being monitored. The pressure may monitored to verify a proper seal is formed or is being maintained. The test procedure may also be performed by maintaining a substantially constant drawdown rate using a hydraulic threshold or a variable restrictor.

Abstract: A method and related apparatus for telemetry between downhole devices and surface devices. In particular, the methods and related apparatus may send a first datum of a first parameter in an uncompressed form, and send a second datum of the first parameter in compressed form.

Abstract: A method and related apparatus for telemetry between downhole devices and surface devices. In particular, the methods and related apparatus may send a first datum of a first parameter in an uncompressed form, and send a second datum of the first parameter in compressed form.