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| Number | Title | Issue Date |
| 8190369 | System and method for stress field based wellbore steering A system and method for the geomechanical steering of the orientation of a wellbore is disclosed. In one embodiment, any available a priori data regarding the stress characteristics of a region of interest are used to develop a preliminary stress model for the regio... | 05/29/2012 |
| 8180571 | Wellbore surveying This invention relates to surveying wellbores. In particular this invention provides methods of correcting magnetic surveys for the effects introduced by magnetic mud. The method of the present invention comprises, in broad terms, measuring gravitational and magneti... | 05/15/2012 |
| 8170800 | Method and system for monitoring a drilling operation The present invention provides a computer-implemented software tool that is adapted to listen continuously to data streams from a drilling operation and to process the data to generate a situation description for a current drilling situation in a form useful for aut... | 05/01/2012 |
| 8165815 | Method for electromagnetic air-wave suppression by active cancellation and shielding Method for reducing air wave and/or magnetotelluric noise in controlled source electromagnetic surveying by either shielding the source (61) from the air interface, shielding the receivers from downward traveling electromagnetic energy, or by employing a seco... | 04/24/2012 |
| 8145428 | Assessing petroleum reservoir reserves and potential for increasing ultimate recovery Determining a Recovery Deficiency Indicator™ (RDI™) for a petroleum reservoir provides a novel leading indicator and metric that is designed to quickly assess the potential for increases in reserves and ultimate recovery of petroleum from an operating petroleum ... | 03/27/2012 |
| 8082104 | Method to determine rock properties from drilling logs A method of identifying one or more rock properties and/or one or more abnormalities occurring within a subterranean formation. The method includes obtaining a plurality of drilling parameters, which include at least the rate of penetration, the weight on bit, and t... | 12/20/2011 |
| 8073623 | System and method for real-time quality control for downhole logging devices An illustrative embodiment of a method is disclosed for assessing image quality of a down hole formation image, the method comprising collecting acquisition system data from a plurality of sensors down hole; applying a set of rules to the acquisition system data to ... | 12/06/2011 |
| 8060310 | Geosteering in earth formations using multicomponent induction measurements A multicomponent induction logging tool is used on a MWD bottomhole assembly. Multifrequency focusing that accounts for the finite, nonzero, conductivity of the mandrel is applied. Using separation of modes, the principal components and a direction of a conductivity... | 11/15/2011 |
| 7991555 | Electromagnetic directional measurements for non-parallel bed formations An orientation vector, referred to hereinafter as the “geosteering vector,” is directed to the more conductive formation area within the DOI of the tool and away from the more resistive formation areas. Accordingly, drilling in a direction opposite the geosteeri... | 08/02/2011 |
| 7991554 | Method for predicting rate of penetration using bit-specific coefficients of sliding friction and mechanical efficiency as a function of confined compressive strength A method for predicting the rate of penetration (ROP) of a drill bit drilling a well bore through intervals of rock of a subterranean formation is provided based on determined relationships between a bit-specific coefficient of sliding friction μ and mechanical eff... | 08/02/2011 |
| 7970543 | Predicting tropical cyclone destructive potential by integrated kinetic energy according to the Powell/Reinhold scale A method of predicting the destructive capacity of a tropical cyclone based on a new Wind Destructive Potential (WDP) and Storm Surge Destructive Potential (SDP) scales which provide a manner to rate the severity of hurricanes and typhoons, based on information prov... | 06/28/2011 |
| 7962288 | Multiple distributed force measurements Methods, computer programs, and systems for detecting at least one downhole condition are disclosed. Forces are measured at a plurality of locations along the drillstring. The drillstring includes a drillpipe. At least one of the forces is measured along the drillpi... | 06/14/2011 |
| 7953554 | Signal thresholding apparatus, systems, and methods In some embodiments, an apparatus and a system, as well as a method and an article, may include selecting a plurality of signal thresholds T(i)=i*(TMAX/N) for i=2 to N comprising a positive integer greater than one. TMAX may be equal to AMAX/R, where AMAX=a maximum ... | 05/31/2011 |
| 7894991 | Statistical determination of historical oilfield data A method, system, and computer program product for performing oilfield surveillance operations. The oilfield has a subterranean formation with geological structures and reservoirs therein. The oilfield is divided into a plurality of patterns, with each pattern compr... | 02/22/2011 |
| 7877211 | Downlink based on pump noise A method for determining a drilling event includes measuring a first signal from a sensor over a first selected time interval, measuring a second signal from the sensor over a second time interval, determining if a noise is reduced in the second signal. ... | 01/25/2011 |
| 7848887 | Making directional measurements using a rotating and non-rotating drilling apparatus A system and method to determine directional measurements for a drilling tool that at times rotates and at other times does not rotate. The method includes making a first set of measurements when the apparatus is rotating, making a second set of measurements when th... | 12/07/2010 |
| 7725263 | Gravity azimuth measurement at a non-rotating housing Aspects of this invention include methods for surveying a subterranean borehole. In one exemplary aspect, a change in borehole azimuth between first and second longitudinally spaced gravity measurement sensors may be determined directly from gravity measurements mad... | 05/25/2010 |
| 7711486 | System and method for monitoring physical condition of production well equipment and controlling well production A system and method for producing fluid from a completed well is provided wherein the method in one aspect includes determining a first setting of at least one first device under use for producing the fluid from the well; selecting a first set of input parameters th... | 05/04/2010 |
| 7706980 | Blowout preventer testing system and method A method and apparatus for testing a blowout preventer (BOP) wherein a pressurization unit applies fluid to an isolated portion of the throughbore of the BOP. A signal that is representative of the actual pressure in the isolated portion of the throughbore over succ... | 04/27/2010 |
| 7684929 | Geometrical optimization of multi-well trajectories A novel method is presented to automatically design a multi-well development plan given a set of previously interpreted subsurface targets. This method identifies the optimal plan by minimizing the total cost as a function of existing and required new platforms, the... | 03/23/2010 |
| 7672785 | Method and system for evaluating and displaying depth data A method and apparatus for displaying depth of positional data with tubing analysis data obtained by instruments analyzing tubing sections being withdrawn from a well includes an apparatus for communicably linking an encoder or other positional or depth sensors to t... | 03/02/2010 |
| 7650241 | Use of the dynamic downhole measurements as lithology indicators A drilling system provides indications of the lithology of the formation being drilled by dynamically measuring at least one parameter of interest that is affected by the lithology of the formation being drilled. Suitably positioned sensors make dynamic measurements... | 01/19/2010 |
| 7617051 | Method and system for pre-drill pore pressure prediction In general, the invention relates to a method for pore pressure prediction. The method includes obtaining a compressional wave (P-wave) velocity and a shear wave (S-wave) velocity for a pre-drill location, calculating an effective stress at the pre-drilling location... | 11/10/2009 |
| 7606666 | System and method for performing oilfield drilling operations using visualization techniques The invention relates to a method of performing a drilling operation for an oilfield. The method includes collecting oilfield data, a portion of the oilfield data being real-time drilling data generated from the oilfield during drilling, defining a number of oilfiel... | 10/20/2009 |
| 7584055 | Core sample orientation A core orientation device (10) for a core drill (12). The device (10) includes an arrangement (14) for providing signals (16) associated with a physical orientation (18) of the core orientation device (10). Processing... | 09/01/2009 |
| 7558675 | Probablistic imaging with azimuthally sensitive MWD/LWD sensors A method for forming a borehole image of an azimuthally sensitive borehole or formation parameter is disclosed. Such a borehole image may be formed, for example, by processing logging sensor data with a predetermined sensor response function (also referred to herein... | 07/07/2009 |
| 7555391 | Multiple distributed force measurements Methods, computer programs, and systems for detecting at least one downhole condition are disclosed. Forces are measured at a plurality of locations along the drillstring. The drillstring includes a drillpipe. At least one of the forces is measured along the drillpi... | 06/30/2009 |
| 7548817 | Formation evaluation using estimated borehole tool position Caliper measurements made during rotation of a bottomhole assembly are processed to estimate the location of the BHA, and size and shape of the borehole. A piecewise elliptical fitting procedure may be used. These estimates may be used to correct measurements made b... | 06/16/2009 |
| 7546209 | Formation dip geo-steering method A method of drilling a well. The method includes calculating an estimated formation dip angle, wherein said estimated formation dip angle being based on offset well data, seismic data, core data, pressure data. Next, the method includes drilling a well with a loggin... | 06/09/2009 |
| 7529626 | Method of integration and displaying of information derived from a mud gas isotope logging interpretative process in association with geophysical and other logs from oil and gas drilling operations A method of displaying well log isotopic information in a drilling operation of a target area. The method begins by profiling a plurality of mud gas samples through a well bore at a plurality of incremental depths of the well bore. The plurality of gas samples are a... | 05/05/2009 |
| 7529625 | Method and system for assessing pore fluid pressure behaviour in a subsurface formation A method and system for assessing pore fluid pressure behaviour in a region of interest in a subsurface formation below an earth surface. A stress value representative of formation stress is determined in a measurement region in the subsurface formation. Signals rep... | 05/05/2009 |
| 7519475 | Method for determining block properties of a service rig by evaluating rig data An operator of a well service rig can retrieve and monitor a display of data on the position of a block during rod and tubing insertion and removal. The operator inputs into the system a minimum and maximum height range that he wants the block to operate within. Dat... | 04/14/2009 |
| 7472022 | Method and system for managing a drilling operation in a multicomponent particulate system In general, the invention relates to a method for managing a drilling operation in a multicomponent particulate system. The method includes obtaining a plurality of geophysical and petrophysical data associated with the multicomponent particulate system, obtaining a... | 12/30/2008 |
| 7460957 | Geometrical optimization of multi-well trajectories A novel method is presented to automatically design a multi-well development plan given a set of previously interpreted subsurface targets. This method identifies the optimal plan by minimizing the total cost as a function of existing and required new platforms, the... | 12/02/2008 |
| 7440876 | Method and apparatus for drilling waste disposal engineering and operations using a probabilistic approach A method for determining distribution data for a disposal domain parameter to increase assurance in a cuttings injection process, including performing a fracturing simulation using a site specific datum to obtain a fracturing result, determining a probability of cre... | 10/21/2008 |
| 7438128 | Identifying zones of origin of annular gas pressure A method for identifying annular gas sources in a wellbore is disclosed. In one embodiment, the method comprises providing a set of parameters, wherein the set of parameters corresponds to depths in the wellbore. In addition, the method comprises analyzing annular g... | 10/21/2008 |
| 7421345 | Geosteering in earth formations using multicomponent induction measurements A multicomponent induction logging tool is used on a MWD bottomhole assembly. Multifrequency focusing that accounts for the finite, nonzero, conductivity of the mandrel is applied. Using separation of modes, the principal components and a direction of a conductivity... | 09/02/2008 |
| 7418348 | Signal thresholding apparatus, systems, and methods In some embodiments, an apparatus and a system, as well as a method and an article, may include selecting a plurality of signal thresholds including a product of an integer ranging from about 2 to N and a ratio of a quotient of a maximum peak amplitude of the acoust... | 08/26/2008 |
| 7412331 | Method for predicting rate of penetration using bit-specific coefficient of sliding friction and mechanical efficiency as a function of confined compressive strength A method for predicting the rate of penetration (ROP) of a drill bit drilling a well bore through intervals of rock of a subterranean formation is provided. The method uses an equation based upon specific energy principles. A relationship is determined between a bit... | 08/12/2008 |
| 7404456 | Apparatus and method of identifying rock properties while drilling Acoustic signals generated by drilling a bore hole with a drill bit are received at sensors placed in the drill string. The acoustic signals received by the sensors are processed, e.g. using a Fourier transform, and a characteristic of the acoustic signals is used t... | 07/29/2008 |
