Halliburton Energy Services, Inc.

Sperry Sun Drilling Services, Inc.

Laban M Marsh

Bipin Kumar Pillai

Cili Sun

Paul F Rodney

Christopher A Golla

James H Dudley

Ronald L Spross

Paul D Beene

Mark Anton Proett

Gregory N Gilbert

Jean Michel Beique

James E Stone

David Welshans

James M Fogal

M Vikram Rao

Mark Anthony Sitka

John Ransford Hardin, Jr

Svetozar Dimitrov Simeonov

John R Hardin

Malcolm Douglas McGregor

Glenn C Gray

Billy C Bankston

Chris Gao

William Edward Hendricks

Barry McKay

Robert A Schave

Alp Kozak

Jay Martin

Wilbert Joseph Chenevert

Leonardo Viana

Stuart Sargeant

Bobby T Wilson

Chris A Golla

William E Hendricks

Malcolm D Mcgregor

Jean M Beique

Bipin K Pillai

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.

Delta encoding of downhole images of petrophysical rock properties

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.

Mud pulse telemetry

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.

Sensor data compression for downhole telemetry applications

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.

System and method for classifying and storing well data

For some embodiments, a software application for correcting sensor data in a remote database () according to magnetic correction parameters obtained from a geophysical survey service, the sensor data obtained from directional instruments on a well tool (). The remote database resides in a field computer () at a well site, and a copy of the remote database may also reside in a real time operations computer system. For some embodiments, the sensor data for particular depths and measurement times are stored as rows in a table (FIG.). The correction software may write new rows in the remote database with the corrected sensor data, or may write new rows in a second database for storing corrected sensor data (FIG.).

Remote processing of well tool sensor data and correction of sensor data on data acquisition systems

A string of subs includes a controller sub. The controller sub includes a first end, a second end, a controller, a first controller bus coupled to the controller, the first controller bus exiting at the first end of the controller sub, and a second controller bus coupled to the controller, the second controller bus being separate from the first controller bus, the second controller bus exiting at the second end of the controller sub. The string of subs also includes a first measuring sub and a second measuring sub. A process, running on a computer, discovers that the first measuring sub is connected to the first controller bus, discovers that the second measuring sub is connected to the first controller bus, determines that the first measuring sub is physically closer to the controller sub than the second measuring sub, and use the fact that the first measuring sub is physically closer to the controller sub than the second measuring sub in controlling the operation of the string of subs.

Determining the order of devices in a downhole string

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.

Methods and apparatus for measuring formation properties

One embodiment includes an apparatus that includes a storage medium to store data. The apparatus also includes a connector having an optical interface for data communication, coupled to the storage medium, to communicate in a combustible gas environment.

Optical communications with a bottom hole assembly

One embodiment includes an apparatus that includes a coherent radiation source to emit coherent radiation through a signal carrier that is positioned along at least a part of a length of a downhole drilling component. The apparatus also includes a receiver to receive the coherent radiation that is to be emitted through the signal carrier.

Measuring the weight on a drill bit during drilling operations using coherent radiation

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.

Filtering and detection of telemetry

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.

Method and system of sending a reduced representation of logging data to log analysis applications

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.

Methods for using a formation tester

Growing community of inventors

Houston, TX, United States of America

Laban M Marsh