Class / Patent application number | Description | Number of patent applications / Date published |
367086000 | BOREHOLE TESTING | 13 |
20090262603 | Method for characterizing a geological formation traversed by a borehole - Methods for characterizing a geological formation, the methods include retrieving measured data provided by a measuring tool along one or more logged borehole length for a borehole, another borehole or both in order to produce a borehole imaging log. Selecting depth-defined intervals of the borehole imaging log as training images for inputting in a multi-point geostatistical model. Determining pattern based simulations for each training image using a pixel-based template of the multi-point geostatistical model so as to obtain training image patterns. Using the pattern based simulation of each training image to assign to each of the training image a corresponding training image pattern. Constructing from the training image patterns one or more fullbore image log of a borehole wall of the borehole. Repeat the second to fourth steps through the one or more logged borehole length in order to construct fullbore images from successive, adjacent training images. | 10-22-2009 |
20110188348 | METHOD AND APPARATUS FOR MONITORING ACOUSTIC ACTIVITY IN A SUBSURFACE FORMATION - A method and apparatus is disclosed for monitoring microseismic activity in a formation. The method and apparatus include placing a tool string having a shuttle including a sensor thereon in a stimulation well, and activating the shuttle to acoustically couple the sensor to an inner surface of a casing. The sensor is acoustically decoupled from the tool string. Fluid is then injected into the formation via the tool string. The sensor is reengaged with the tool string. The tool string may then be removed from the stimulation well or moved to another position along the wellbore. | 08-04-2011 |
20110242938 | ULTRASONIC MEASUREMENTS PERFORMED ON ROCK CORES - One or more embodiments and methods of analyzing a formation sample with in a coring tool are disclosed herein. The methods and embodiments may include extracting a first core from a sidewall of a wellbore with a coring tool at a first depth, ultrasonically measuring a sound speed of the first core, transmitting the ultrasonically measured sound speed of the first core to a surface display unit, analyzing the ultrasonically measured sound speed in real time, determining the quality of the first core, extracting a second core at the first depth if the first core is determined to be low quality, and extracting the second core at a second depth if the core first is determined to be high quality. | 10-06-2011 |
20120127830 | DOWNHOLE IMAGING SYSTEM AND RELATED METHODS OF USE - A downhole imaging system includes a downhole imaging tool, a surface workstation, and a real-time data feed configured to connect between the downhole imaging tool and the surface workstation. | 05-24-2012 |
20120230151 | Borehole Imaging And Orientation Of Downhole Tools - Methods of generating radial survey images of a borehole and methods of orienting downhole operational tools are disclosed. The disclosed techniques are used to generate a radial survey of the borehole in the form of one or more rose-plots and/or a radial image of the borehole and surrounding area that can be used to properly orient downhole operational tools in the desired direction. The tool string includes, from the top to bottom, a telemetry module, a non-rotating centralizer, a motor module, an imaging sonde used to survey the borehole, a rotating centralizer and a downhole operational tool. The motor module can be used to rotate the imaging sonde to generate the radial survey and then rotate the downhole operational tool to the desired direction based upon a review of the radial survey. | 09-13-2012 |
20120314540 | HOLLOW REBAR FOR CROSSHOLE SONIC LOGGING ACCESS TUBES AND LONGITUDINAL CONCRETE REINFORCING IN DRILLED SHAFTS - Hollow rebar may be used for structural reinforcement in a drilled shaft and to provide access tubes for a sonic integrity testing probe. Rebar (short for reinforcing bar) is steel bar used as a tensioning device in reinforced concrete that holds the concrete in compression. According to the system described herein, hollow rebar may provide high strength reinforcement in the drilled shaft while at the same time providing an access tube for a sonic integrity testing process, such as crosshole sonic logging (CSL). The high strength hollow rebar, having ridges, threads and/or other appropriate surface deformations, provides improved adhesion to concrete, thus eliminating the problem of debonding associated with non-structural access tubes made of smooth PVC or steel pipe. | 12-13-2012 |
20140086012 | VOLUMETRIC PIEZOELECTRIC SEISMIC WAVE SOURCE AND RELATED METHODS - Seismic wave sources and related methods are provided. A seismic wave source includes a housing, plural pillars and an excitation system. The housing is split in two halves along a plane including a longitudinal axis of the housing. The plural pillars are made of piezoelectric elements and are positioned inside the housing to have one end in contact with a semi-cylindrical middle portion of one half of the housing and another end in contact with a semi-cylindrical middle portion of the other half of the housing. The excitation system connected by wires to the plural pillars and is configured to provide electrical signals to the piezoelectric elements. Upon receiving the electrical signals from the excitation system, the pillars generate forces on the housing thereby generating seismic waves. | 03-27-2014 |
20140219057 | SYSTEM AND DEVICE FOR ACOUSTIC MEASURING IN A MEDIUM - A device for acoustic measuring in a medium in a borehole such as velocity of sound in the medium or velocity of the medium, includes at least a first acoustic array situated in a first, slanted sidewall of a measuring area and operating to emit a series of acoustic waveforms across a measuring area. In one form, the device includes a second acoustic array situated in a second, slanted sidewall of the measuring area and operating to receive an acoustic signal resulting from the emitted series of acoustic waveforms or to receive said acoustic signal and emit a second series of acoustic waveforms. A the processor measures a time between when a predefined portion of one of the series of acoustic waveforms was emitted and when a predefined portion of the received acoustic signal corresponding to the predefined portion of one of the series of acoustic waveforms is received by the acoustic receiver, and correlates the measured time to a reference time, then outputs a correlation factor for determining the velocity of sound in the medium in the measuring area. The processor may also calculate transit time for the two emitted acoustic signals or echoes from the first emitted acoustic signals to determine medium flow velocity. | 08-07-2014 |
20140233354 | METHOD FOR DETERMINING THE ACOUSTIC CHARACTERISTICS OF A MUD FILTER CAKE - At least one acoustic sensor registers a pressure response to a low-frequency non-oscillating pressure signal generated in a borehole by at least one source. At least one characteristic of a transient process of pressure change is determined from the registered signal. A thickness of a mudcake is determined. Then, based on the values received, a mudcake piezoconductivity or a fluid mobility or both are determined. | 08-21-2014 |
20140247694 | Acoustic Standoff and Mud Velocity Using a Stepped Transmitter - A system, apparatus and method for determining an acoustic property of a fluid in a wellbore is disclosed. A faceplate is placed in the wellbore with a stepped surface of the faceplate in contact with the fluid. The stepped surface includes a non-stepped face and a stepped face. A first portion of an acoustic pulse passes from the faceplate into the fluid via the non-stepped face and a second portion of the acoustic pulse passes from the faceplate into the fluid via the stepped face. A first reflected acoustic pulse related to the first portion of the acoustic pulse is received. A second reflected acoustic pulse related to the second portion of the acoustic pulse is received. A measurement of the first reflected acoustic pulse and a measurement of the second reflected pulse are used to determine the acoustic property of the fluid in the wellbore. | 09-04-2014 |
20140334262 | Method and Apparatus for Active Seismic Shear Wave Monitoring of Hydro-Fracturing of Oil and Gas Reservoirs Using Arrays of Multi-Component Sensors and Controlled Seismic Sources - Disclosed herein are various embodiments of a technique to monitor hydro-fracturing in oil and gas wells by use of active seismic sources and arrays of monitoring sensors. The invention utilizes combinations of seismic sources such as vertical vibrators in anti-phase pairs. The invention utilizes combinations of multi-component rotational seismic sensors, and/or multi-component linear sensors, and/or pressure sensors. Sensors are jointly deployed in arrays on the surface and/or in shallow monitoring wells to avoid the complicating effects of the free surface of the earth. The emplacement of sensors on the surface or in the shallow monitoring wells may be permanent. Fractures are monitored by combinations of physical effects such as propagation time delays, shear reflections, birefringent shear wave splitting, and amplitude variations. The method has a wide range of application in oil and gas exploration and production. This abstract is not intended to be used to interpret or limit the claims of this invention. | 11-13-2014 |
20160047238 | METHODS AND APPARATUS FOR EVALUATING PROPERTIES OF CEMENT UTILIZING ULTRASONIC SIGNAL TESTING - Apparatus and methods are provided. An ultrasonic tool with an array of axially spaced receivers and a transmitter is located in a borehole and is activated. Ultrasonic waveform indications recorded by the receivers are processed and analyzed to determine the presence of non-dispersive headwave signatures. If a non-dispersive headwave signature is located, the presence of a solid such as cement in the annulus is confirmed, and one or more of the compressional and shear velocities of the cement can be determined. If only casing dispersive mode signatures are found, the annulus is determined to possibly contain no cement at the location of interest and additional processing is required. | 02-18-2016 |
20160108721 | METHOD AND APPARATUS FOR INVESTIGATING A BOREHOLE WITH A CALIPER - Embodiments of the present invention relate to a caliper and method for mapping the dimensions and topography of a formation such as the sidewall of a borehole. Examples of formations in which embodiments of the invention can be used include, but are not limited to, an oil, gas, pile borehole or barrette that has been drilled or excavated into the earth. | 04-21-2016 |