Patent application number | Description | Published |
20130017980 | Compositions and Methods for Mitigation of Annular Pressure Buildup in Subterranean Wells - Compositions and methods that mitigate pressure buildup in the annular space between two tubular bodies in subterranean wells. The composition of the invention comprises an aqueous solution of crosslinkable acrylamide-base polymer, a crosslinker and a gas. Once foamed and placed in the annular space, the composition provides a resilient, flexible, compressible and durable body that is able to compensate for pressure increases in the annular space, thereby protecting the integrity of the tubular bodies. | 01-17-2013 |
20130020066 | APPARATUS AND METHOD FOR TREATING A SUBTERRANEAN FORMATION USING DIVERSION - Apparatus and method comprising a plurality of particles which are magnetically attracted to one another in response to exposure to a magnetic field, and which maintain attraction to one another after removal of the magnetic field, the attraction being disabled when the particles are demagnetized, whereby the particles operate to alter the rheological properties of a fluid in which the particles are mixed when the attraction is enabled or disabled is disclosed. | 01-24-2013 |
20130021874 | Methods for Locating A Cement Sheath in A Cased Wellbore - A distributed acoustic wave detection system and method is provided. The system may include a fiber optic cable deployed in a well and configured to react to pressure changes resulting from a propagating acoustic wave and an optical source configured to launch interrogating pulses into the fiber optic cable. In addition, the system may include a receiver configured to detect coherent Rayleigh noise produced in response to the interrogating pulses. The CRN signal may be used to track the propagation of the acoustic waves in the well. Such capability allows the location of the cement sheath, as well as measuring the bonding of cement to at least a casing string at least partially surrounded by a cement sheath. | 01-24-2013 |
20130025215 | SYSTEM AND METHODS FOR ACTUATING REVERSIBLY EXPANDABLE STRUCTURES - An actuator is provided for reconfiguring a reversibly expandable structure, also referred to as a deployable structure. The deployable structure includes an enclosed mechanical linkage capable of transformation between expanded and collapsed configurations while maintaining its shape. An actuator coupled to the deployable structure provides a load, force or torque for actuating a transformation. The actuated deployable structure transfers the actuation force to an external body substances, or element in contact with the deployable structure. The force can be directed inwardly or outwardly depending upon direction of the transformation (i.e., expanding or contracting). The force provided by the deployable structure can be used to perform work by its application over at least a portion of the distance traveled by a perimeter of the deployable structure during its transformation. In some embodiments, the actuatable deployable structure is lockable structure supporting a static load. | 01-31-2013 |
20130025863 | Methods for Servicing Subterranean Wells - Pumpable process-fluid compositions comprise polyacrylamide, a non-metallic crosslinker and a pH-adjustment material. Such compositions have utility in the context of controlling lost circulation in subterranean wells. Upon entering at least one lost circulation zone, the compositions crosslink, thereby forming a barrier that minimizes or stops fluid flow from the wellbore into the lost circulation zone. | 01-31-2013 |
20130044566 | Seismic Source Controller and Display System - A seismic survey system for performing offset borehole seismic survey measurement operations. The system may include a first seismic survey subsystem having a first wireless digital communication device and a second seismic survey subsystem having a second wireless digital communication device and remotely located from the first seismic survey subsystem. The first and second digital communication devices may be configured to provide a digital communication link for transporting digital information between the first seismic survey subsystem and second seismic survey subsystem. The system may be configured to enable a user at the first seismic survey subsystem to remotely modify at least a portion of a first plurality of operating parameters associated with at least one source signal device located at the second seismic survey subsystem. The system may also be configured to utilize GPS information in order to improve accuracy of source signal firing timing synchronization. | 02-21-2013 |
20130054207 | Fracture Network Characterization Method - A method of representing and using fractures in a model of a subterranean reservoir is described including the partitioning the fracture network into a discretely modeled part and a remaining statistically described part from a statistical description of all fractures, the determination of the correlation effects caused by fractures with dimensions exceeding dimension of the local grid cells and the determination of petrophysical properties while allowing for arbitrary distribution of facture orientations, with all three aspects being combinable to improve the modeling of fractures and the simulation of fractured reservoirs. | 02-28-2013 |
20130062059 | FOCUSED SAMPLING OF FORMATION FLUIDS - An apparatus for obtaining a fluid at a position within a wellbore that penetrates a subterranean formation includes a body adapted to be disposed in the wellbore on a conveyance equipped with one or more expandable packers providing a sample region disposed between an upper cleanup zone and a lower cleanup zone when expanded into abutting contact with the wellbore wall; an upper cleanup port provided at the upper cleanup zone; a lower cleanup port provided at the lower cleanup zone; at least one fluid cleanup flowline in fluid connection with the upper and lower cleanup ports; a sampling inlet provided at the sampling region; and a sampling flowline in fluid connection with the sampling inlet for drawing fluid from the sampling region. | 03-14-2013 |
20130075095 | Method and Apparatus for Treatment of A Perforated Casing - A method of and apparatus for treating a zone in a well is disclosed. A tube that is permeable to a material is inserted into a wellbore, creating an annulus inside the wellbore. Two zones—the annular region and the formation surrounding the wellbore—may be treated. The method comprises the following steps. (1) A setting section surrounded by a sleeve is placed inside the tube near the zone to treat, the sleeve being expandable and impermeable to the material. (2) The sleeve is inflated inside the tube near the zone to treat, ensuring that a first zone of the tube is impermeable to the material, but leaving a second zone permeable to the material. (3) A treatment fluid is pumped to the zone to treat, the treatment fluid passing into the annulus via the second zone. (4) The zone to treat is treated with the treatment fluid. | 03-28-2013 |
20130079260 | METHOD FOR SINGLE-STAGE TREATMENT OF SILICEOUS SUBTERRANEAN FORMATIONS - In a method of treating a sandstone-containing formation penetrated by a wellbore, a treatment fluid comprising an aqueous fluid containing a Bronsted acid, a hydrogen fluoride source and an organic acid or salt thereof that is substantially soluble in the aqueous fluid is formed. The treatment fluid contains less than about 2% of fluoride (F | 03-28-2013 |
20130080059 | INTEGRATED DIP FROM 3D RESISTIVITY TOOL AND BOREHOLE IMAGING TOOL - A method for determining a dip of a geological structure in a subterranean formation, involves generating, using a 3D resistivity analyzer, a first intermediate result describing the dip of the geological structure based on 3D resistivity data collected from a borehole penetrating the subterranean formation. The method further involves generating, using a borehole image analyzer, a second intermediate result describing the dip of the geological structure based on a borehole image collected from the borehole. The method further involves generating, by a computer processor combining the first intermediate result and the second intermediate result based on a pre-determined criterion, an integrated result describing the dip of the geological structure. | 03-28-2013 |
20130083031 | Customizable User Interface for Real-Time Oilfield Data Visualization - Real-time visualization of well data is provided on a customized user interface. A visualization module server stores a plurality of visualization modules, each of which is configured to graphically display elements of the well data based on aggregated data in a set of data aggregation servers. One or more advanced user computers are each configured to compose viewers including one or more of the visualization modules, and a viewer server stores the viewers composed on the one or more advanced user computers. Each viewer is configured to graphically display well data in real-time specific to a data context of the one or more well sites, e.g., on one or more end user computers that are each configured to access one or more of the composed viewers on the viewer server. | 04-04-2013 |
20130087903 | Electronics Packaging For High Temperature Downhole Applications - A downhole tool is described. The downhole tool includes a work device and an electronics packaging connected to the work device. The electronics packaging comprises a housing, a substrate, at least one first type component, and at least one second type component. The housing defines a void. The substrate is positioned within the void of the housing and forms a first cavity and a second cavity relative to the housing. The first cavity and the second cavity are isolated to form separate atmospheric chambers. The at least one first type component is disposed in the first cavity and connected to the substrate. The at least one second type component is disposed in the second cavity and connected to the substrate. The at least one first type component is different from the at least one second type component. | 04-11-2013 |
20130091922 | Composite Materials And Calibration Assemblies Using The Same - A calibration assembly is disclosed. In one embodiment, a calibration assembly calibrating a downhole formation evaluation tool includes a calibration base having a first geometry, a calibration insert including a first material and having a second geometry, and a second material having a third geometry and being different from the first material. The second geometry enables the calibration insert to receive the second material to form a first composite region, wherein the first and second materials and the second and third geometries are selected such that a calibration property of the calibration assembly apparatus substantially matches a corresponding calibration property of a third material. Additional apparatuses, devices, and methods are also disclosed. | 04-18-2013 |
20130092377 | USE OF A CHOPPER MECHANISM TO ADD FIBERS TO A WELL - A chopper mechanism for providing a fiber to a fluid at an oilfield. The chopper mechanism may be employed to process the fiber from an uncut form to a cut form in order to provide a mixture of the fluid and the fiber with flowback inhibiting character. Techniques of employing the chopper mechanism may be utilized at the site of an oilfield for applications such as fracturing, cementing, and drilling. Additionally, the chopper mechanism itself may be made available as a large high capacity chopper assembly, or a smaller handheld chopper gun for slower rate fiber supply operations. | 04-18-2013 |
20130092384 | SUBSEA TREE SAFETY CONTROL SYSTEM - An embodiment of a method for limiting the probability of failure on demand of a subsea test tree (“SSTT”) includes the steps of providing a safety shut-in system for actuating a safety valve of the SSTT, the safety shut-in system including a surface control station positioned above a water surface connected via an umbilical to a subsea control system positioned below the water surface to actuate the safety valve; and diagnostically testing the safety shut-in system without actuating the safety valve. | 04-18-2013 |
20130092443 | Formation Evaluation While Drilling - In one embodiment, a sampling while drilling tool includes a drill collar having a first end, a second end, an outer wall extending between the first and second ends, and at least one opening extending through the outer wall to a cavity within the drill collar. The sampling while drilling tool also includes a sample chamber positionable in the cavity through the opening in the outer wall and a passage for conducting a drilling fluid through the drill collar. | 04-18-2013 |
20130098619 | SPLIT STREAM OILFIELD PUMPING SYSTEMS - A method of pumping an oilfield fluid from a well surface to a wellbore is provided that includes providing a clean stream; operating one or more clean pumps to pump the clean stream from the well surface to the wellbore; providing a dirty stream including a solid material disposed in a fluid carrier; and operating one or more dirty pumps to pump the dirty stream from the well surface to the wellbore, wherein the clean stream and the dirty stream together form said oilfield fluid. | 04-25-2013 |
20130113480 | MULTIPHYSICS NMR LOGGING TECHNIQUES FOR THE DETERMINATION OF IN SITU TOTAL GAS IN GAS RESERVOIRS - Methods for the determination of the Total Gas in Place (TGiP) in gas-bearing formations are provided. Aspects of the subject disclosure also relate to the determination of the TGiP from nuclear magnetic resonance (NMR) logs alone or in combination other well logs. | 05-09-2013 |
20130113629 | PHASE SENSITIVE COHERENT OTDR WITH MULTI-FREQUENCY INTERROGATION - A fiber optic sensor system includes a coherent-detection optical time domain reflectometry system to extract phase information from optical signals returned from a fiber optic sensor arrangement in response to a plurality of interrogating pulses. The system includes a frequency-shifting circuit to repeatedly translate the frequency of an optical pulse generated by a narrowband source to generate a train of interrogating pulses of multiple frequencies. The optical signals returned from the sensor arrangement in response to the pulse train is mixed on a photodetector with light from the narrowband source that has not been shifted to generate mixed output signals. The mixed output signals are filtered into frequency bands, and the phase for each frequency band is extracted. | 05-09-2013 |
20130114376 | AUTOMATIC DISPERSION EXTRATION OF MULTIPLE TIME OVERLAPPED ACOUSTIC SIGNALS - Slowness dispersion characteristics of multiple possibly interfering signals in broadband acoustic waves as received by an array of two or more sensors are extracted without using a physical model. The problem of dispersion extraction is mapped to the problem of reconstructing signals having a sparse representation in an appropriately chosen over-complete dictionary of basis elements. A sparsity penalized signal reconstruction algorithm is described where the sparsity constraints are implemented by imposing a l | 05-09-2013 |
20130116156 | CHEMICAL SEAL RING COMPOSITION AND METHOD OF USING - Disclosed herein is a chemical seal ring composition that includes polyacrylamide crosslinked with a non-metallic crosslinker such as polylactam. Also, described in a method of forming a chemical seal ring from the chemical seal ring composition. | 05-09-2013 |
20130118742 | Engineered Fibers for Well Treatments - Mixtures of fibers and solid particles are effective for curing fluid losses and lost circulation in a subterranean well. Stiff fibers are more effective than flexible ones; however, mixtures of stiff and flexible fibers have a synergistic effect. The quantity and particle-size distribution of the solids are optimized according to the stiffness, dimensions and concentrations of fibers. | 05-16-2013 |
20130118748 | Gelled Foam Compositions And Methods - The invention provides a method made of steps of injecting into a wellbore, a composition comprising a solvent, a surfactant, a foaming gas, a foam enhancer, a crosslinkable polymer, and a crosslinking agent capable of crosslinking the polymer, wherein the foam enhancer increases the foam half-life of the gel composition compared to the gel composition without the foam enhancer; and allowing viscosity of the composition to increase and form a gel. | 05-16-2013 |
20130118758 | HYDROSTATIC PRESSURE INDEPENDENT ACTUATORS AND METHODS - An actuator that may be used in a wellbore to change the state of a downhole tool. The actuator has an operator that is axially movable in response to changes in tubing pressure. The actuator includes a hydraulic circuit that creates a temporary reference pressure against which the tubing pressure indexes the operator. | 05-16-2013 |
20130124096 | Determining Drill String Status in A Wellbore - A method for determining a status of a drill string in a wellbore. The method can include obtaining pressure data and hook load data for the drill string. The pressure data can be filtered to obtain pressure sections. A low pressure threshold can be determined based upon the pressure sections. The hook load data can be filtered to obtain hook load sections. Hook load baselines can be determined based upon the hook load sections. Dynamic thresholds can be determined based upon the hook load baselines. An in-slips status of the drill string can be determined based upon the low pressure threshold, the dynamic thresholds, or both. | 05-16-2013 |
20130124178 | MULTISEGMENT FRACTURES - A method can include identifying a discrete natural fracture in a three-dimensional environment that includes a reservoir modeled by a three-dimensional grid model, representing the discrete natural fracture via a multisegment model in a two-dimensional region within the three-dimensional grid model, defining at least one connection for fluid communication between the multisegment model and the three-dimensional grid model, defining boundary conditions for the multisegment model, and solving the multisegment model subject to the at least one connection and the boundary conditions to provide values for fluid flow in the two-dimensional region. Various other apparatuses, systems, methods, etc., are also disclosed. | 05-16-2013 |
20130126171 | Heat Dissipation in Downhole Equipment - A downhole assembly may include a housing having an outer surface and an inner surface, the outer surface adapted for contact with a downhole fluid, the inner surface defining an interior volume. One or more heat producing components may be disposed within the interior volume and in thermal contact with a structural component (e.g., chassis). One or more thermal dissipation members may be disposed within the housing, the one or more thermal dissipation members in thermal contact with the chassis and in thermal contact with the inner surface of the housing. | 05-23-2013 |
20130126239 | Directional Drilling Attitude Hold Controller - An attitude hold controller method includes receiving at a navigable apparatus a demand inclination and a demand azimuth with respect to a global coordinate system and determining at the navigable apparatus a demand attitude vector according to the received demand inclination and the demand azimuth. Determining at the navigable apparatus a current navigable apparatus attitude vector. Evaluating a control law using the current navigable apparatus vector and the navigable apparatus demand attitude to derive a control law tool face, converting the control law tool face to an equivalent tool face, and applying the equivalent tool face with the navigable apparatus to control the navigable apparatus attitude. | 05-23-2013 |
20130132050 | Dynamic Prediction of Downhole Temperature Distributions - Downhole temperature distributions of aspects of a drilling scenario are predicted using computer-implemented methods. The temperature distributions are predicted based on models defined as functions of sets of parameters associated with the drilling environment. Numerical solution methods are utilized to predict downhole temperature distributions, accounting for translation of the drill string. | 05-23-2013 |
20130140025 | Equipment for Remote Launching of Cementing Plugs - An apparatus for remotely launching cementing plugs is configured such that the length of a dart is not necessarily the same as the corresponding plug to be launched. Such a design presents operational and ergonomic advantages, particularly in an offshore environment. Methods for launching cementing plugs and cementing a subterranean well are also presented. | 06-06-2013 |
20130140031 | SYSTEM AND METHOD FOR PERFORMING OPTIMIZED DOWNHOLE STIMULATION OPERATIONS - A method of performing a stimulation operation for an unconventional wellsite having natural fractures and hydraulic fractures. The method involves providing at least one treatment parameter with a corresponding objective function value and performing a fracture operation based on the treatment parameter. The fracture operation involves defining a treatment schedule, conducting a hydraulic fracture operation, and estimating production. The objective function value is based on an objective function. The method also involves modifying the treatment parameter and performing the fracture operation based on the modified treatment parameter. The modified treatment parameter has a corresponding modified objective function value based on the objective function. The method continues with optimizing the treatment operation by comparing the objective function value with the modified objective function value, and repeating the modifying and optimizing for new modified treatment parameters until convergence about a desired outcome whereby an optimized parameter is defined at convergence. | 06-06-2013 |
20130141103 | Induction Coil Impedance Modeling Using Equivalent Circuit Parameters - Methods and related systems are described for making an electromagnetic induction survey of a formation surrounding a cased section of a borehole. An electromagnetic transmitter and/or receiver is deployed into the cased section of the borehole. Electromagnetic survey measurements and impedance measurements relating to impedance of the transmitter and/or receiver are made while deployed in the section of the borehole. Compensation is made for the attenuation amplitude and/or phase in the electromagnetic survey measurements due to the conductive casing. The compensation is based on the impedance measurements and equivalent circuit parameters. The impedance measurements are correlated with numerical modeling results of a purely inductive electromagnetic transducer, and calculated equivalent circuit parameters are combined with the numerical modeling results. | 06-06-2013 |
20130141104 | Shielded Antenna For A Downhole Logging Tool - This disclosure relates to a downhole logging tool for acquiring data in an earth formation. In one embodiment, the downhole logging tool has a tool body with a longitudinal axis, a set of antennas located on the tool body and including coil windings forming a closed-loop pattern, and a shield disposed over the antennas and having an arrangement of slots with each slot being substantially perpendicular to a proximate portion of at least one of the underlying coil windings, wherein the path length around each slot is more than twice the length of the distance between the slot and a directly adjacent slot along an arc of the coil windings. The downhole logging tool may be a wireline or while-drilling tool, and it may be an induction or propagation tool. | 06-06-2013 |
20130141122 | MICROSENSOR FOR MERCURY - Methods and devices for detecting a concentration of one or more element in hydrocarbon and/or natural gas in an oil and gas field application. The device including a microstructure having a low thermal mass suspended within a channel, the microstructure includes a supporting layer and a insulating layer; a controllable thermal device in communication with the supporting layer of the microstructure, wherein the controllable thermal device is controllably heated to one or more release temperature of the one or more element; a sensing layer arranged on the insulating layer to absorb molecules of the one or more element from hydrocarbon and/or natural gas; a detecting and measuring resistance device in communication with the sensing layer for measuring the resistance changes caused by absorption of molecules of the one or more element onto the sensing layer at a first temperature and a second temperature, and storing the data on a processor. | 06-06-2013 |
20130144579 | ROTATIONS FROM GRADIENT DIRECTIONS - A method can include defining a two dimensional grid of cells for a region associated with a geologic environment, assigning directions to at least some of the cells, tracing a first set of trajectories with respect to the grid based on the directions, determining a first set of scalar field values based on the first set of trajectories, rotating the directions, tracing a second set of trajectories with respect to the grid based on the rotated directions, determining a second set of scalar field values based on the second set of trajectories, outputting a map based on the first set of scalar field values and the second set of scalar field values and applying the map to map a spatially distributed variable in the region associated with the geologic environment. Various other apparatuses, systems, methods, etc., are also disclosed. | 06-06-2013 |
20130145837 | Downhole Sensor Systems and Methods Thereof - A sensor module for a sensing apparatus configured for operation downhole, within a borehole. The sensor module comprises a sensor array having a plurality of sensors to sense selected formation parameters and a control system for selective and independent operation of each sensor of the sensor array. Each sensor of the sensor array is configured or designed as a discrete sensor unit for individual and independent communication and control. Each sensor of the sensor array may have an associated electronics module that provides standardized electronic connectivity with the control system. | 06-13-2013 |
20130151215 | RELAXED CONSTRAINT DELAUNAY METHOD FOR DISCRETIZING FRACTURED MEDIA - Systems and methods for modeling a fractured medium are provided. The method includes discretizing fractures in a representation of the fractured medium, with the discretizing including defining points along the fractures and edges extending between adjacent points. The method also includes determining that at least one of the edges is a non-Gabriel edge, and removing the non-Gabriel edge from the representation. The method further includes approximating the removed non-Gabriel edge to generate an approximated edge, and inserting the approximated edge into the representation. | 06-13-2013 |
20130152668 | METHODS FOR DETERMINING WETTABILITY ALTERATION - A protocol for determining the effect of water composition on surface alteration is described using simple and less preparation sensitive, brine/oil and rock/brine/air systems when compared to conventional rock/brine/oil measurement methods. A model glass/brine/oil system is described and it is demonstrated that experimental measurements of contact angle obtained using a conventional approach agree well with the contact angles predicted using the proposed protocol. | 06-20-2013 |
20130153229 | SYSTEM, METHOD AND APPARATUS FOR ENHANCING WELLBORE TREATMENT FLUID FLEXIBILITY - A method includes performing a chemical process to create a chemical product and an amount of heat, and transferring the heat to a first fluid. The method further includes hydrating a polymer in the first fluid, and adding the chemical product from the chemical process to the first fluid to create a treatment fluid. The method further includes diluting the treatment fluid with respect to at least one constituent of the treatment fluid. The method includes treating a formation of interest in a wellbore with the treatment fluid. The method includes changing a formulation of the treatment fluid during the treating. The method also includes extending the treating beyond a design amount, or ending the treatment before the design amount and preserving some reagents of the chemical process. | 06-20-2013 |
20130158876 | COMBINING INELASTIC AND CAPTURE GAMMA RAY SPECTROSCOPY FOR DETERMINING FORMATION ELEMENTAL - A method for determining weight fractions of a plurality of elements in a subsurface formation penetrated by a wellbore includes determining weight fractions of a first plurality of elements using measurements of capture gamma rays made in the wellbore. The capture gamma rays result from bombardment of the formations with high energy neutrons. A weight fraction of a second plurality of elements is determined using measurements of inelastic gamma rays made in the wellbore resulting from bombardment of the formations with high energy neutrons. The weight fraction for the second plurality is determined by setting a transformation factor for those elements common to both the first and second plurality to result in a statistically equivalent weight fraction for the common elements as determined, for the first plurality of elements. Weight fractions of elements in the second plurality not common to the first plurality of elements is determined using the set transformation factor. | 06-20-2013 |
20130161501 | Systems and Methods for Determining Property of A Geological Formation from Gravitational Potential Difference - Systems and methods are provided for determining a property, e.g., density, of a geological formation based on Einstein's theory of gravitation. A gravitational potential difference is determined between two positions of the geological formation by measuring a frequency shift of a radiation travelling from a source to an absorber of a differential gravimeter. The gravitational potential difference determined can be converted to a density of the geological formation, e.g., based on a concentric spherical shell model. The systems can be a part of a downhole tool. | 06-27-2013 |
20130161503 | Systems and Methods Using Tunable Differential Gravimeter - Systems and methods are provided for determining a property, e.g., density, of a geological formation based on Einstein's theory of gravitation. A gravitational potential difference is determined between two positions of the geological formation by measuring a frequency shift of radiation travelling from a source to an absorber of a differential gravimeter. The differential gravimeter can be a part of a downhole tool. The gravitational potential difference determined can be used to determine the property of the geological formation. | 06-27-2013 |
20130161504 | Systems and Methods Using Tandem Gravimeter - Systems and methods are provided for determining a property, e.g., density, of a geological formation based on Einstein's theory of gravitation. A tandem-structured gravimeter uses two gamma radiations emitted to two directions to determine a gravitational potential difference between two positions of the geological formation. The gravimeter can be a part of a downhole tool. The gravitational potential difference determined can be used to determine the property of the geological formation. | 06-27-2013 |
20130168084 | Determination of Stick Slip Conditions - A method for determining stick slip conditions. The method may include disposing an operating apparatus in fluid communication with a pressure wave transmission medium. At least one pressure measurement device may be disposed at least partially within the pressure wave transmission medium and at some distance from the operating apparatus. One or more pressure waves generated by the operating apparatus may be measured within the pressure wave transmission medium with the at least one pressure measurement device and pressure measurement data may be generated therefrom. The pressure measurement data from the at least one pressure measurement device may be transmitted to a data acquisition system. The pressure measurement data may be analyzed to detect one or more stick slip conditions from one or more variations in the pressure measurement data. | 07-04-2013 |
20130168096 | Additive to Fluid for The Treatment of Subterranean Formation and A Method for Treating Subterranean Formation - The composition includes a pH adjusting agent and a precipitation-control agent. The pH adjusting agent provides the hydrolysis of degradable fibers at a temperature of no more than 50° C. and comprises substances that may provide and maintain a high pH environment. The precipitation-control agent allows maximally delaying or completely suppressing the formation and deposition of precipitate during the hydrolysis of the degradable components in the treatment fluid A method of treating an subterranean formations penetrated by a wellbore with the additives described herein comprises providing a treatment fluid comprising a base mixture and a degradable substance, with additionally added degradable materials, and injecting the prepared treatment fluid into the subterranean formation. | 07-04-2013 |
20130170713 | SLABBED CORE FORMAT FOR BOREHOLE IMAGE DATA - A method can include providing borehole data organized with respect to a cylindrical surface, defining one or more bedding planes based at least in part on the borehole data, and transforming at least a portion of the borehole data to a planar slab format for a plane interior to the cylindrical surface. Various other apparatuses, systems, methods, etc., are also disclosed. | 07-04-2013 |
20130175041 | PRESSURE TOLERANT BATTERY - A pressure tolerant battery that may be utilized in a subsea riser includes one or more lithium polymer cells enclosed in a pressure compensated housing. The pressure tolerant battery can be mounted on a landing string a disposed in the riser annulus to provide electrical power to landing string and subsea well system devices. | 07-11-2013 |
20130175045 | IN-RISER HYDRAULIC POWER RECHARGING - A method for pressurizing a hydraulic accumulator includes creating an annulus pressure zone in hydraulic communication with the hydraulic accumulator through a hydraulic recharging circuit and applying a hydraulic pressure to the annulus pressure zone. Operating the hydraulic recharging circuit in response to applying the hydraulic pressure and pressurizing the hydraulic accumulator in response to operating the hydraulic recharging circuit. | 07-11-2013 |
20130176026 | Magnetic Resonance Imaging Methods - A method of investigating an object using nuclear magnetic resonance (NMR) equipment includes generating a one-dimensional projection of the object for each of a plurality of echoes utilizing echo train signal indications resulting from pulse sequences, and utilizing the plurality of one-dimensional projections, for each of the plurality of echoes, generating NMR image data for at least one location in the object. The NMR image data may be displayed. The displayed data may include a T2 decay curve, a T2 value display, a T2 distribution graph, or petrophysical data for at least one object location. | 07-11-2013 |
20130180722 | TECHNIQUE OF FRACTURING WITH SELECTIVE STREAM INJECTION - A technique facilitates enhanced hydrocarbon recovery through selective stream injection. The technique employs a system and methodology for combining a fracturing technique and application of selective injection streams. The selective injection streams are delivered to select, individual subterranean layers until a plurality of unique subterranean layers are fractured to enhance hydrocarbon recovery. | 07-18-2013 |
20130180735 | COMPLETIONS FLUID LOSS CONTROL SYSTEM - A completions fluid loss control system for incorporation into upper completion hardware. The system allows for the avoidance of a dedicated intermediate completion installation in advance of upper completion delivery to a lower completion at a formation interface. The system includes a unique cup packer and flow regulation arrangement such that annular fluid thereabove may be isolated away from space below the system while at the same time allowing annular fluid therebelow to bypass the system. As such, the upper completion may be advanced toward the installed lower completion while maintaining well control at the noted formation interface. | 07-18-2013 |
20130180780 | Pulsed Neutron Generator Tube Design Which Extends The Lifetime Of A Cathode - A method for operating a pulsed neutron generator including an ionizer with an electron emitting cathode and a grid wherein the cathode and grid are disposed in a sealed chamber. At least one of the following is applicable to the ionizer; a distance between the cathode and the grid, a cathode current and/or a potential on the grid are selected such that the ionizer operates at most about one-half the space charge limited current for a grid current selected to provide a predetermined amount of neutron production. | 07-18-2013 |
20130181689 | BROADBAND VIBRATIONAL ENERGY HARVESTING - A system that converts environmental vibrational energy into electrical energy includes a transducer that undergoes oscillating movement in response to the vibrational energy in order to produce an oscillating electrical signal. Power electronics process the oscillating electrical signal. A control system (including at least one control element of the power electronics, at least one sensor and control electronics) carries out a control scheme that dynamically varies the dampening of the oscillating movement of the transducer over time. The control scheme is based upon a predetermined parametric relation involving a plurality of variables derived from the properties measured by the at least one sensor. In several embodiments, the plurality of variables includes a first variable representing excitation frequency of the transducer. In another embodiment, the predetermined parametric relation represents relative phase between two variables derived from the properties measured by the at least one sensor. | 07-18-2013 |
20130183177 | Tubing Encased Motor Lead - A system and methodology facilitates the supply of electrical power in a variety of harsh environments. The technique may utilize an electrical power cable having an insulator located around an electrical conductor. The insulator and the electrical conductor are positioned within a metallic tube. In a variety of applications, the metallic tube enables construction of the electrical power cable without an armor layer. A jacket is disposed between the insulator and the metallic tube and is designed to compensate for differences in thermal expansion between the materials. The jacket may be formed with gas pockets distributed therein to compensate for a different level of thermal expansion of the jacket relative to, for example, the metallic tube. | 07-18-2013 |
20130185940 | MANUFACTURING OF SAND SCREENS - A rod-based well screen is formed in place on a perforated pipe base by wrapping wire around the pipe base and a plurality of rods located around the outside of the pipe. The wire is welded sequentially to each individual rod as it is wrapped around the pipe. The welding and ground electrodes engage the wire and the rods respectively. The rod engaging ground electrode is positioned a short distance ahead of the wire being wrapped around the rods and the pipe base. The ground electrode includes a plurality of contacts. Each contact is mounted to pivot toward and away from a rod. Springs urge each contact toward a rod to hold the rod against the outside surface of the pipe base and to maintain good electrical contact between the contact and the rod. Each contact has a groove to guide the rod into position for welding to the wire. | 07-25-2013 |
20130186203 | Sensor Configuration - A sensing unit includes four uniaxial sensors each capable of detecting a movement component along a respective axis having a respective orientation and arranged such that the angles between any two of said respective orientations of said respective axes are substantially equal, wherein the uniaxial sensors are arranged such that in use the respective axes are at substantially the same angle to the vertical direction and the horizontal direction. | 07-25-2013 |
20130187035 | WELL-LOGGING APPARATUS INCLUDING AZIMUTHALLY SPACED RADIATION DETECTORS - A well-logging device may include a housing to be positioned within a larger borehole of a subterranean formation and thereby define a stand-off distance with respect to the larger borehole. The well-logging device may also include at least one radiation source carried by the housing to direct radiation into the subterranean formation, and radiation detectors carried by the housing in azimuthally spaced relation to detect radiation from the subterranean formation. The well-logging device may further include a controller to cooperate with the radiation detectors to determine at least one property of the subterranean formation corrected for the stand-off distance. | 07-25-2013 |
20130191044 | METHOD AND SYSTEM FOR PRESENTING STRESS DOMAIN - A method for presenting a stress domain includes analyzing, using a cost function, multiple stress ratio values and orientation values to obtain results, generating a stress domain diagram relating the stress ratio values and the orientation values to the results, and presenting the stress domain diagram. | 07-25-2013 |
20130192357 | Job Monitoring Methods And Apparatus For Logging-While-Drilling Equipment - Job monitoring methods and apparatus for logging-while-drilling equipment are disclosed. A disclosed example method includes identifying a downhole scenario based on a property of an underground geological formation, selecting a first telemetry frame type based on the identified downhole scenario, conveying an identifier representative of the selected first telemetry frame type to a downhole fluid sampling tool, and receiving a first telemetry data frame from the downhole fluid sampling tool, the telemetry data frame containing fluid analysis parameters for a fluid, and being constructed in accordance with the selected first telemetry frame type. | 08-01-2013 |
20130192844 | PASSIVE OFFSHORE TENSION COMPENSATOR ASSEMBLY - A tensions compensator assembly for a slip type joint in an offshore work string. The assembly includes a chamber at the joint which is constructed in a manner to offset or minimize a pressure differential in a production channel that runs through the work string. Thus, potentially very high pressures running through the string are less apt to prematurely force actuation and expansiveness of the slip joint. Rather, the expansive movement of the joint is more properly responsive to heave, changes in offshore platform elevation and other outside forces of structural concern. | 08-01-2013 |
20130192845 | LINER DRILLING USING TEMPORARILY SEALED LINER - A drilling apparatus including a first cylindrical layer including a plurality of cylindrical members, and a second cylindrical layer including a plurality of elongate members, the plurality of cylindrical members and the plurality of elongate members arranged to form a plurality of spaces between an outer diameter of the first cylindrical layer and an inner diameter of the second cylindrical layer. | 08-01-2013 |
20130192848 | COMPLETIONS ASSEMBLY WITH EXTENDABLE SHIFTING TOOL - A completions assembly that includes an extendable and retractable shifting tool at a lower end of an upper completion. Outfitted with this type of tool, the upper completion may be sealably landed out at an installed lower completion without prematurely opening an isolation valve that ensures well control thereat. Rather, the full completions assembly may be finished out and the valve later opened by extending of the shifting tool from the upper completion toward the isolation valve at the lower completion. Once more, this type of well control is achieved through use of hydraulic lines that are dedicated to the upper completion even though the isolation valve is located therebelow. As a result, the extended use of hydraulic couplings and other complex or wear-prone well control architecture may be largely avoided. | 08-01-2013 |
20130195683 | Pre-Charging Pump Chamber By Preemptively Opening A Valve - A reciprocating pump with chamber-charging mechanism is provided. In an example diaphragm pump, a discharge valve can be opened by the pressure of fluid leaving the pump and can also be opened by an intermittent mechanical linkage actuated by the reciprocating member powering the pump. The discharge valve is mechanically opened to allow pressure backflow into the pumping chamber, thereby charging compressible fluid mixtures and gases with an increase in pressure. The increased pressure enables the compressible fluids to open the discharge valve on the next compression stroke and exit the pump. In an implementation, the discharge valve is pushed open by the reciprocating power source in a configuration that seals the valve mechanism from well fluid. In another implementation, the discharge valve is pulled open to pre-charge the pumping chamber. | 08-01-2013 |
20130195684 | SUBSEA PUMPING SYSTEM - A technique is provided for pumping fluid in subsea applications. A self-contained pumping module is created by mounting a pumping unit on a skid that can be lowered to a sea floor. The skid comprises a support structure designed to hold the pumping unit in a desired orientation, such as an inclined orientation with respect to a base of the skid. The self-contained nature of the pumping module facilitates deployment to a sea floor/retrieval from the sea floor to enable use of the pumping module in a variety of subsea applications with reduced complexity and cost. | 08-01-2013 |
20130197808 | Methods And Apparatus For Characterization Of Hydrocarbon Reservoirs - A methodology performs downhole fluid analysis at multiple measurement stations within a wellbore traversing a reservoir to determine gradients of compositional components and other fluid properties. A model is used to predict concentrations of a plurality of high molecular weight solute part class-types at varying reservoir locations. Such predictions are compared against downhole measurements to identify the best matching solute part class-type. If the best-matching class type corresponds to at least one predetermined asphaltene component, phase stability of asphaltene in the reservoir fluid at a given depth is evaluated using equilibrium criteria involving an oil rich phase and an asphaltene rich phase of respective components of the reservoir fluid at the given depth. The result of the evaluation of asphaltene rich phase stability is used for reservoir analysis. The computational analysis that evaluates asphaltene rich phase stability can also be used in other reservoir understanding workflows and in reservoir simulation. | 08-01-2013 |
20130199799 | CONTRACTION JOINT SYSTEM - A system and methodology facilitates conveyance of a tool, e.g. a downhole completion or completion component, via a tool string. The tool string comprises a contraction joint designed to contract if the tool incurs sufficient axial loading. The contraction joint may comprise an outer housing and a mandrel slidably received in the outer housing. The contraction joint also comprises a resettable locking member which selectively releases the mandrel with respect to the outer housing to contract the contraction joint when under sufficient axial loading. | 08-08-2013 |
20130204534 | Method Of Estimating A Subterranean Formation Property - A method of analyzing a subterranean formation may include collecting a plurality of tool responses from different tools and generating a respective theoretical equation relating tool responses for each of the tools to properties of the subterranean formation. The method may also include generating a database having the tool responses stored therein based upon each respective theoretical equation and generating a non-linear mapping function relating at least one of the tool responses to at least one property of the subterranean formation. The method may also include estimating a value for the at least one property based upon the non-linear mapping function. | 08-08-2013 |