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| Number | Title | Issue Date |
| 7726404 | Use of carbon-dioxide-based fracturing fluids A method of treating a shale-containing subterranean formation penetrated by a wellbore is accomplished by forming a carbon dioxide treatment fluid having a viscosity of less than about 10 mPa-s at a shear rate of about 100 s−1. The carbon dioxide treat... | 06/01/2010 |
| 7661477 | System and method for unsticking a tool stuck in a wellbore An unsticking assembly for releasing a tool that is stuck in a wellbore including a first anchor actuatable between an engaging position wherein the first anchor engages a wall of the wellbore and a retracted position wherein the first anchor does not engage the wal... | 02/16/2010 |
| 7635028 | Acidic internal breaker for viscoelastic surfactant fluids in brine Compositions and methods are given for delayed breaking of viscoelastic surfactant gels inside formation pores, particularly for use in hydraulic fracturing. Breaking inside formation pores is accomplished without mechanical intervention or use of a second fluid. Ac... | 12/22/2009 |
| 7632787 | Low damage treatment fluids and methods of using the same The invention relates to novel wellbore treatment methods and fluids using compositions formed from an aqueous medium, a regularly substituted hydrophilically functional polysaccharide having a degree of substitution from about 0.1 to about 0.5, wherein the percent ... | 12/15/2009 |
| 7603261 | Method for predicting acid placement in carbonate reservoirs A computationally efficient general method of modeling or simulating matrix acidizing treatment when flow is not axisymmetric involves determining streamlines in the general flow field using complex potential theory to solve for the flow along the streamlines. The f... | 10/13/2009 |
| 7589050 | Composition comprising a fully dissolved non-HF fluoride source and method for treating a subterranean formation An aqueous oilfield treatment fluid containing a chelating agent and an HF source is described. This fluid is effective at dissolving siliceous materials such as clays and keeping the dissolved materials in solution. In particular it is effective at preventing re-pr... | 09/15/2009 |
| 7588081 | Method of modifying permeability between injection and production wells The invention provides a method of treating a subterranean formation penetrated by at least one injection well and at least one production well, the method comprising the steps of a) analyzing the injection well, the production well, and reservoir contained in the s... | 09/15/2009 |
| 7581590 | Heterogeneous proppant placement in a fracture with removable channelant fill A method of heterogeneous proppant placement in a subterranean fracture is disclosed. The method comprises injecting well treatment fluid including proppant (16) and proppant-spacing filler material called a channelant (18) through a wellbore (10 | 09/01/2009 |
| 7578346 | Method of plugging fractured formation A material and method for treating a fractured formation penetrated by a wellbore includes providing a quantity of resin coated particles having a particle size of from about 0.2 mm to about 2.35 mm. A quantity of smaller deformable or non-deformable particles is co... | 08/25/2009 |
| 7565929 | Degradable material assisted diversion Degradable material assisted diversion (DMAD) methods for well treatment, DMAD treatment fluids, and removable plugs for DMAD in downhole operations. A slurry of solid degradable material is injected into the well, a plug of the degradable material is formed, a down... | 07/28/2009 |
| 7398828 | Well cementing slurries containing fibers The problem of fiber or particle settling in well cement slurries is addressed by providing a fluid containing two fiber components of differing properties. Such a well treatment fluid, comprising a base fluid; a first fiber component that it substantially more dens... | 07/15/2008 |
| 7387986 | Viscoelastic surfactant rheology modification A method for shortening the shear recovery time of cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of an amphiphilic polymeric rheology enhancer containing at least one portion that is a partially hydrolyzed... | 06/17/2008 |
| 7350572 | Methods for controlling fluid loss A method of treatment of subterranean formations in which leakoff through natural fractures is controlled through the use of fibers. The method involves pumping a mixture of a formation treatment fluid and a fiber into the formation for matrix stimulation, fracture ... | 04/01/2008 |
| 7345012 | Foamed viscoelastic surfactants A method for increasing the foam stability of foams made with cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of an amphiphilic polymeric foam stabilizer containing at least one portion that is a partially h... | 03/18/2008 |
| 7281585 | Offshore coiled tubing heave compensation control system An offshore oil well assembly is provided that includes a floating vessel and a coiled tubing injector supported on the floating vessel. A coiled tubing string is movable by the injector into and out of a wellbore. The assembly also includes at least one measurement... | 10/16/2007 |
| 7265079 | Self-destructing filter cake A composition and method are given for self-destructive fluid loss additives and filter cakes in wellbores and subterranean formations. The fluid loss additives and filter cakes are formed from a mixture of particulate solid acid-precursors, such as a polylactic aci... | 09/04/2007 |
| 7259689 | Transmitting power and telemetry signals on a wireline cable A wireline logging assembly includes a cable having primary conductors, secondary conductors, and a central conductor. A first power source excites the primary conductors using a first propagation mode. A first telemetry transceiver excites the primary conductors us... | 08/21/2007 |
| 7259331 | Lightweight armor wires for electrical cables Disclosed are electric cables with improved armor wires used with wellbore devices to analyze geologic formations adjacent a wellbore. The cables include at least one insulated conductor, and one or more armor wires surrounding the insulated conductor. The armor wir... | 08/21/2007 |
| 7258522 | Method for mounting a frac blender on a transport vehicle A frac blender mounted on a transport vehicle and adapted for movement along a vertical, linear path between a raised stowed position and a lowered operating position. The frac blender is moved between positions by a drive system that is slip connected to the frac b... | 08/21/2007 |
| 7119283 | Enhanced armor wires for electrical cables Electric cables used with wellbore devices to analyze geologic formations adjacent a wellbore including at least one insulated conductor, and one or more armor wires surrounding the insulated conductor, the armor wires formed of a high strength core surrounded by a ... | 10/10/2006 |
| 7055604 | Use of distributed temperature sensors during wellbore treatments The invention relates to a method for treating subterranean formation comprising providing distributed temperature sensors, injecting a treatment fluid and monitoring the temperature across the treatment interval during the injection process. ... | 06/06/2006 |
