| Patent Number |
Title Of Patent |
Date Issued |
| 6835243 |
Cementing in deep water offshore wells |
December 28, 2004 |
| An improved method of cementing casing in a deep water offshore formation penetrated by a well bore comprising the steps of preparing a foamed cement composition comprised of calcium aluminate cement, a set accelerating additive, a thickening time increasing additive, water, a gas, a |
| 6834721 |
System for disconnecting coiled tubing |
December 28, 2004 |
| A disconnect system for coiled tubing. A first end of the coiled tubing is disconnected from a second end of the coiled tubing by holding the coiled tubing in a stationary position at a first and a second location. The coiled tubing is then sheared at one or more locations between the fi |
| 6833699 |
Method for using conventional core data to calibrate bound water volumes derived from true verti |
December 21, 2004 |
| Disclosed are a method and system for developing customized bound water transformations to obtain accurate determinations of non-producible water from nuclear magnetic resonance (NMR) logs. The approaches of this invention can be applied for in situ calibration where laboratory NMR m |
| 6832651 |
Cement composition exhibiting improved resilience/toughness and method for using same |
December 21, 2004 |
| A cement composition for use in borehole applications comprising hydraulic cement, sufficient water to form a slurry, and an effective amount of a resilience/toughness enhancing additive comprising a thermoplastic block copolymer having a tensile strength of from 500 to 4000 psi, a recov |
| 6832650 |
Methods of reducing or preventing particulate flow-back in wells |
December 21, 2004 |
| Methods of reducing or preventing particulate flow-back in subterranean zones. In accordance with the methods, a treating fluid having a mixture of reticulated foam fragments and particulate solids are suspended therein. The treating fluid is introduced into a subterranean zone and the |
| 6832158 |
Real-time method for maintaining formation stability and monitoring fluid-formation interaction |
December 14, 2004 |
| A real-time method is disclosed for maintaining subterranean formation stability through monitoring the interaction between the formation and fluids introduced into (or produced from) a wellbore penetrating the formation. The method employs real-time wellbore (in)stability logging me |
| 6831571 |
Logging device data dump probe |
December 14, 2004 |
| A method and apparatus for transferring data from a logging tool to a surface computer that involves attaching a stand-alone data dump device to the logging tool after the logging tool has gathered data about downhole parameters. After attaching the data dump device, data contained in a |
| 6830106 |
Multilateral well completion apparatus and methods of use |
December 14, 2004 |
| A multilateral well completion. In a described embodiment, a multilateral well completion system includes a completion apparatus installed in a cased parent wellbore. The completion apparatus has an opening in its side which is rotationally aligned with a window in the parent wellbore ca |
| 6830105 |
Proppant flowback control using elastomeric component |
December 14, 2004 |
| According to the invention, a method of treating a subterranean formation is provided comprising the steps of: (a) forming a mixture comprising: (i) a particulate, (ii) an elastomer-forming component in a liquid form or in a solvent solution, and (iii) a fluid for carrying the particulat |
| 6830104 |
Well shroud and sand control screen apparatus and completion method |
December 14, 2004 |
| Improved methods and apparatus for completing a subterranean zone penetrated by a wellbore are provided. The improved methods basically comprise the steps of placing a sand control screen (e.g., screens, screened pipes, perforated liners, prepacked screens, etc.) and an outer shroud |
| 6829947 |
Acoustic Doppler downhole fluid flow measurement |
December 14, 2004 |
| apparatus and system are disclosed for in situ measurement of downhole fluid flow using Doppler techniques. First, a baseline speed of sound is established as close to the desired measurement point as possible. This speed of sound measurement is then used in Doppler calculations for |
| 6829922 |
Evaluating foamed cement under pressure and temperature |
December 14, 2004 |
| A test method for foamed cement does not transfer the test composition under pressure from one device to another and the equipment is not handled under dangerous pressure, thereby providing a safe test method. Steps include: rotating a paddle at a first speed in a pressurized foamable |
| 6823940 |
Methods of consolidating formations and forming a chemical casing |
November 30, 2004 |
| Methods of consolidating unconsolidated weak zones or formations and forming chemical casings include drilling a well bore with a drilling fluid having a pH in the range of from about 6 to 10 and that comprises water, a polymeric cationic catalyst which is adsorbed on the mineral sur |
| 6823939 |
Methods of treating subterranean zones penetrated by well bores |
November 30, 2004 |
| Methods of treating subterranean zones penetrated by well bores wherein the static temperatures of the zones are as high as 400.degree. F. and greater include using aqueous treating fluids comprised of an aqueous liquid containing one or more inorganic monovalent salts, multivalent salts |
| 6823711 |
Static and dynamic calibration of quartz pressure transducers |
November 30, 2004 |
| A system and method for dynamically calibrating signals from a quartz pressure sensor to correct for temperature transients. A series of differences of time spaced temperature readings is stored in a tapped delay line and coupled to a transfer function. The transfer function uses the |
| 6822061 |
Well cement additives, compositions and methods |
November 23, 2004 |
| Improved well cement additives, compositions and methods of using the compositions are provided. The well cement additives are basically comprised of a first monomer selected from the group of 2-acrylamido-2-methylpropane sulfonic acid, 2-allyloxy-2-hydroxy-1-propane sulfonic acid an |
| 6820695 |
Snap-lock seal for seal valve assembly |
November 23, 2004 |
| A float apparatus for use in a casing string. The float apparatus includes an outer case having a check valve positioned therein. A body portion which may be comprised of high compressive strength cement affixes the check valve to the outer case. The check valve includes a valve body and |
| 6820693 |
Electromagnetic telemetry actuated firing system for well perforating gun |
November 23, 2004 |
| A perforating gun assembly for use in a subterranean well incorporates therein an electromagnetic frequency receiver coupled to a motor section which, in turn, is coupled to the mechanically actuatable firing head portion of the perforating gun. The assembly is lowered into a cased w |
| 6819260 |
Synchronous CDMA telemetry system for use in a wellbore |
November 16, 2004 |
| A synchronous CDMA telemetry system is provided for use in a wellbore. In one described embodiment, each data bit of digital outputs of multiple downhole data sources is multiplied by an orthogonal code unique to each data source. The resulting encoded outputs are modulated on a carrier |
| 6819112 |
Method of combining vertical and magnetic dipole induction logs for reduced shoulder and borehol |
November 16, 2004 |
| There is disclosed herein a method of enhancing the vertical resolution of an induction tool, in a manner that may advantageously also reduce undesirable borehole and "negative resistivity" effects. In one embodiment, the method comprises: a) obtaining a vertical magnetic dipole (VMD |
| 6817376 |
Gel hydration tank and method |
November 16, 2004 |
| The present invention relates to a gel hydration tank and method for hydrating gels for use in oil well treatment operations according to which a mixture of water and gel is introduced into the interior of the tank and flows through the tank before being discharged from the tank, whereby |
| 6817229 |
Acoustic sensor for fluid characterization |
November 16, 2004 |
| A method and apparatus for in-situ characterization of downhole fluids in a wellbore using ultrasonic acoustic signals. Measurements of the speed of sound, attenuation of the signal, and acoustic back-scattering are used to provide qualitative and quantitative data as to the composition, |
| 6815946 |
Magnetically activated well tool |
November 9, 2004 |
| A detector assembly and methods including a magnetoresistive sensor capable of detecting anomalies in the wall of a casing string disposed in a wellbore. Examples of anomalies include gaps between casings such as due to casing joints, air gaps in casing threads such as due to flush casin |
| 6815665 |
Apparatus and methods for determining gravel pack quality |
November 9, 2004 |
| Apparatus and method for determining the integrity or quality of a gravel pack positioned between the casing and gravel pack screen of a subterranean borehole, with the method including azimuthally scanning the gravel pack for radiation, with detection of the radiation limited to a l |
| 6814798 |
Storable water-microsphere suspensions for use in well cements and methods |
November 9, 2004 |
| Storable water-microsphere suspensions for use in well cements and methods of cementing well bores are provided. The storable water-microsphere suspensions are basically comprised of water, microspheres and an effective amount of a suspending agent selected from the group consisting |
| 6814142 |
Well control using pressure while drilling measurements |
November 9, 2004 |
| Methods and apparatus for monitoring and controlling the pressure in a wellbore characterized by a drilling system utilizing real-time bottom hole pressure measurements and a control system adapted to control parameters such as well shut-in, drilling fluid weight, pumping rate, and c |
| 6814139 |
Gravel packing apparatus having an integrated joint connection and method for use of same |
November 9, 2004 |
| A gravel packing apparatus comprises multiple joints each having substantially the same construction and each having a perforated outer tubular (150, 152) positioned around a sand control screen (154, 156) including a slurry passageway (190, 194) and a production pathway (188, 192) t |
| 6812811 |
Power discriminating systems |
November 2, 2004 |
| The present invention relates to a control system for selectively supplying electrical power in a remote environment. The system comprises a plurality of electrical circuits, each designed to operate over a unique frequency passband. Power transmitted within the frequency passband of a c |
| 6811603 |
Methods, well cement compositions and lightweight additives therefor |
November 2, 2004 |
| The present invention provides methods, lightweight well cement compositions and additives for the well cement compositions. The methods of the invention for sealing pipe in a well bore penetrating a zone or formation which readily fractures at low hydrostatic pressure is basically c |
| 6810958 |
Circulating cementing collar and method |
November 2, 2004 |
| An apparatus and method for cementing a casing string in a wellbore. A self-filling tubular cementing collar connected to the lower end of a casing string is provided with one-way flow valving that allows well fluid to enter and self-fill the casing string as it is lowered into the w |
| 6810331 |
Fixed-depth of investigation log for multi-spacing multi-frequency LWD resistivity tools |
October 26, 2004 |
| A system and related method for obtaining electromagnetic resistivity logs of a formation having fixed depths of investigation that differ from the actual depths of investigation for the tool. The system and related method comprises calculating actual invaded zone and formation resistivi |
| 6808024 |
Downhole seal assembly and method for use of same |
October 26, 2004 |
| A seal assembly (60) for controlling the flow of fluids in an annulus (68) between a continuous tubular (62) and a cased wellbore (64) is disclosed. The seal assembly (60) includes anchor slips (72) and a seal element (78). The seal assembly (60) is actuated by communicating hydraulic fl |
| 6808022 |
Latch profile installation in existing casing |
October 26, 2004 |
| A method of installing an internal latch profile in an existing tubular string does not require the use of a packer. In a described embodiment, a method of latch installation includes the step of deforming an interior surface of the tubular string after the tubular string is positioned i |
| 6807857 |
Method and apparatus for determining density of a flowing fluid |
October 26, 2004 |
| The current invention provides a process and apparatus for determining the density of a flowing fluid without requiring knowledge of the fluid's Theological properties. The process of the current invention is capable of providing continuous "real time" analysis of fluid density. The appa |
| 6805199 |
Process and system for effective and accurate foam cement generation and placement |
October 19, 2004 |
| A method and apparatus for generating foam cement and placing foam cement in an annulus between a casing and a wellbore. The method includes the steps of displacing cement downwardly in the casing and injecting a gas, preferably nitrogen, into the cement at a predetermined location downh |
| 6802380 |
Pressure relief system and methods of use and making |
October 12, 2004 |
| A roller-cone rock bit in which the compensation reservoir is integrated with a hydrostatically-asymmetric seal, such as a V-seal, which provides pressure relief. This seal not only relieves overpressure during filling, and when the grease thermally expands as the bit first goes downhole |
| 6801135 |
Webserver-based well instrumentation, logging, monitoring and control |
October 5, 2004 |
| Apparatus and methods for webserver-based well instrumentation, logging, monitoring and control provide convenience and economy in well site and off-site operations. In a described embodiment, a well tool includes a webserver connected to a sensor and an actuator of the tool. In response |
| 6800128 |
Whey protein retarder |
October 5, 2004 |
| A method and composition is provided using whey protein as a retarder in a cementing composition for use in cementing operations in a subterranean zone penetrated by a well bore. |
| 6799686 |
Tubular filtration apparatus |
October 5, 2004 |
| An expandable well screen has a desirable thin-wall construction together with a simplified fabrication method. In fabricating the screen, a flexible sheet of metal mesh filter media is diffusion bonded to an inner side of a perforated metal sheet which is then deformed to a tubular shap |
| 6799638 |
Method, apparatus and system for selective release of cementing plugs |
October 5, 2004 |
| A running tool for wiper plugs used in cementing well casings into a wellbore. The running tool and setting balls or darts used to launch the plugs are retrievable following deployment of the plugs. Flapper valve assemblies on the wiper plugs are activated after the plugs are displaced |
| 6799636 |
Methods and compositions for cementing in wellbores |
October 5, 2004 |
| Methods of cementing in wellbores using cement compositions having elasticity or high compressive strength and low permeability are provided. The cement compositions are basically comprised of particulate acid degradable glass, water, at least one water soluble polymerizable alkenoic |
| 6799635 |
Method of cementing a tubular string in a wellbore |
October 5, 2004 |
| Methods of expanding well tools, which permit operation of the well tools after expansion, are provided. In a described example, a cementing tool includes a valve and a packer. After the cementing tool is expanded, the valve is selectively opened and closed, and the packer is sealingly |
| 6799633 |
Dockable direct mechanical actuator for downhole tools and method |
October 5, 2004 |
| The present invention provides an improved system and method for performing a desired operation at a remote location in a wellbore. The system is composed of a downhole docking station assembly and a detachable downhole tool assembly. The downhole tool assembly includes electrically oper |
| 6799117 |
Predicting sample quality real time |
September 28, 2004 |
| Systems and methods for estimating properties of fluid samples pumped from a formation through a well are described. Based upon input properties, an artificial neural network (ANN) may predict a plurality of data points, and each data point may correspond to a predicted time sample of th |
| 6797054 |
Foamed well cement slurries, additives and methods |
September 28, 2004 |
| The present invention provides improved foamed well cement slurries, additives and methods. The foamed well cement slurries are basically comprised of a hydraulic cement, sufficient water to form a pumpable slurry, sufficient gas to form a foam and an effective amount of an additive |
| 6796378 |
Methods of cementing high temperature wells and cement compositions therefor |
September 28, 2004 |
| The present invention provides light weight high temperature well cement compositions and methods. The compositions are basically comprised of calcium aluminate, ASTM class F fly ash, sodium polyphosphate, a cationic derivatized starch fluid loss control additive and water. |
| 6796377 |
Anti-rotation apparatus for limiting rotation of cementing plugs |
September 28, 2004 |
| An apparatus for preventing or limiting the rotation of cementing plugs in a casing string during drillout. The apparatus includes an outer housing with a sleeve disposed therein. The sleeve has an inner surface configured to engage cementing plugs received therein to cause an interferen |
| 6795774 |
Method for asymptotic dipping correction |
September 21, 2004 |
| Induction and other resistivity well logging tools determine formation conductivity at various depths but these measurements contain pronounced errors when the tool is proximate to an inclined underground bed boundary. A method to correct tool measurements includes calculating an expecte |
| 6795773 |
Well completion method, including integrated approach for fracture optimization |
September 21, 2004 |
| Fracture design for well completion includes determining a conductivity profile for the given reservoir to be fractured. Materials needed to obtain this conductivity profile are selected based on their ability to meet the conductivity objective and their rank based on economic value. A |
| 6794875 |
Induction well logging apparatus and method |
September 21, 2004 |
| A coil arrangement and method of collecting and processing data in induction logging of wells is disclosed. The coil arrangement includes three essentially identical coils made of elliptical conductive loops lying in a plane tilted from the axis of the logging tool. Each coil is cent |
