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| Number | Title | Issue Date |
| 7533728 | Ball operated back pressure valve A method for selectively closing a downhole one way check valve, the method having the following steps: attaching the valve to a casing; locking the valve in an open configuration; running the casing and the valve into the wellbore; reverse circulating a composition... | 05/19/2009 |
| 7458267 | Acoustic emission inspection of coiled tubing A method for testing tubing having the following steps: plastically deforming the tubing with a tubing handling system, the tubing handling system having a reel, a gooseneck and an injector; sensing with at least one sensor acoustic emissions emitted by the tubing d... | 12/02/2008 |
| 7455112 | Methods and compositions relating to the control of the rates of acid-generating compounds in acidizing operations Of the many methods provided, in one embodiment, a method is provided that comprises: providing an acid-generating fluid that comprises an acid-generating compound, a base fluid, and a salt; placing the acid-generating fluid in a well bore penetrating a subterranean... | 11/25/2008 |
| 7451817 | Methods of using casing strings in subterranean cementing operations Improved casing strings, and methods of using improved casing strings in subterranean cementing operations, are provided. An example of an apparatus is a pipe string comprising at least one pipe section and a delivery system of an activator. Another example of an ap... | 11/18/2008 |
| 7416590 | Water-based ink set for ink-jet recording A water-based ink set for ink-jet recording includes at least a yellow ink, a magenta ink and a cyan ink. At least one color ink of the yellow, magenta and cyan inks includes a first ink and a second ink which have different hue angles h having therebetween the colo... | 08/26/2008 |
| 7409991 | Methods of using casing strings in subterranean cementing operations Improved casing strings, and methods of using improved casing strings in subterranean cementing operations, are provided. An example of an apparatus is a pipe string comprising at least one pipe section and a delivery system of an activator. Another example of an ap... | 08/12/2008 |
| 7405998 | Method and apparatus for generating fluid pressure pulses Apparatuses and methods for generating fluid pressure pulses are disclosed. An example apparatus may include a chamber that can collect fluid and an upstream ported disc coupled to a downstream end of the chamber. The upstream ported disc may rotate about a central ... | 07/29/2008 |
| 7404440 | Methods of using casing strings in subterranean cementing operations Improved casing strings, and methods of using improved casing strings in subterranean cementing operations, are provided. An example of an apparatus is a pipe string comprising at least one pipe section and a delivery system of an activator. Another example of an ap... | 07/29/2008 |
| 7404416 | Apparatus and method for creating pulsating fluid flow, and method of manufacture for the apparatus In one embodiment, the present invention provides an apparatus for creating pulsating fluid flow, including an inlet into which fluid flows and a chamber having an upstream end and a downstream end. The chamber is defined by a pair of outwardly-projecting sidewalls,... | 07/29/2008 |
| 7401861 | Apparatus for removing surface coverings and methods for using such apparatus A apparatus for removing surface coverings, includes a shaft having a first end and a second end; a sleeve slidably mounted on the first end of the shaft; a clevis pivotably mounted on a first end of the sleeve; a drive mechanism for shifting a rod between a first r... | 07/22/2008 |
| 7401646 | Methods for reverse-circulation cementing in subterranean formations Methods and systems for reverse-circulation cementing in subterranean formations are provided. An example of a method is a method of cementing casing in a subterranean well bore, comprising inserting a casing into the well bore, the casing comprising a casing shoe; ... | 07/22/2008 |
| 7392840 | Method and means to seal the casing-by-casing annulus at the surface for reverse circulation cement jobs A method for sealing an annulus defined between an outer casing and an inner casing, the method having steps as follows: fastening a lock ring to an anchor base, wherein the lock ring comprises a threaded fastener of the lock ring to the head; positioning the lock r... | 07/01/2008 |
| 7390178 | Compressor A compressor comprises a plurality of pairs of a cylinder bore and a piston moving reciprocally in the cylinder bore, a valve plate provided with a plurality of outlet holes for leading pressurized gas in the cylinder bores to the outside, a plurality of strap-shape... | 06/24/2008 |
| 7389815 | Methods for reverse-circulation cementing in subterranean formations Methods and systems for reverse-circulation cementing in subterranean formations are provided. An example of a method is a method of cementing casing in a subterranean well bore, comprising inserting a casing into the well bore, the casing comprising a casing shoe; ... | 06/24/2008 |
| 7384112 | Inkjet recording apparatus An inkjet recording apparatus for recording an image on a recording medium, including a recording head, a drive circuit and a control device. The head includes an ink passage, a nozzle communicated with the passage, an actuator applying energy to ink in the passage ... | 06/10/2008 |
| 7363978 | Methods of using reactive surfactants in subterranean operations Novel uses of reactive surfactants in treating subterranean formations and/or proppant particulates are provided. In one embodiment, the present invention provides a method comprising: providing a treatment fluid that comprises a base fluid and a reactive surfactant... | 04/29/2008 |
| 7363502 | Systems and methods for powering up controllers In one embodiment of the present invention, a system for powering up a controller is described. The system includes a power source, a heat generator adapted to receive power from the power source, and a controller adapted to receive power from the power source and a... | 04/22/2008 |
| 7360373 | Vehicle air-conditioning system An evaporator placed in a vehicle compartment includes a meandering flattened pipe, a header joined with one end of the flattened pipe for introducing a compressed refrigerant from a compressor placed in an engine room, and a header joined with the other end of the ... | 04/22/2008 |
| 7362591 | Power supply device and image forming apparatus When a detected current value deviates from a range between an upper limit value and a lower limit value, a pulse width adjustment operation for increasing or decreasing a currently set counter value is repeatedly performed at every operation time interval such that... | 04/22/2008 |
| 7357181 | Apparatus for autofill deactivation of float equipment and method of reverse cementing A method for cementing a casing in a wellbore, the method having the following steps: attaching a valve to a casing; locking the valve in an open configuration; running the casing and the valve into the wellbore; reverse circulating a cement composition down an annu... | 04/15/2008 |
| 7353876 | Self-degrading cement compositions and methods of using self-degrading cement compositions in subterranean formations Methods of stimulating subterranean formations are provided. More particularly, methods of fracturing subterranean formations using a fracturing fluid comprising a self-degrading cement composition are provided. An example of a method is a method of treating a subte... | 04/08/2008 |
| 7356427 | Methods and systems for estimating a nominal height or quantity of a fluid in a mixing tank while reducing noise Systems and methods are provided for estimating the height of a fluid contained in a mixing tank. A dynamic control device which operates as an external observer is used for controlling and monitoring the estimation. This estimate of the height is then compared to t... | 04/08/2008 |
| 7350568 | Logging a well A method for logging a well. Includes receiving energy with at least one array of elements coupled to a drill bit, wherein the at least one array of elements functions as an electronic array. An apparatus for logging a well includes a drill bit and at least one arra... | 04/01/2008 |
| 7352598 | Inverter units with duty cycle control based on the detected, high and low output voltage An inverter unit includes a DC power source, an inverter circuit having two or more pairs of switching elements which are connected in parallel to the DC power source, so that a DC voltage of the DC power source is converted into a pulse train-like, pseudo-AC voltag... | 04/01/2008 |
| 7350578 | Diverter plugs for use in well bores and associated methods of use Zonal isolation of well bores is often desirable for performing downhole operations such as stimulation operations. In certain embodiments, diverter plugs for achieving zonal isolation in a casing string in a well bore may comprise a mandrel having a first end and a... | 04/01/2008 |
| 7350571 | Methods of preparing and using coated particulates The present invention involves methods of preparing coated particulates and using such coated particulates in subterranean applications such as production enhancement and sand control. One embodiment of the present invention provides a method of preparing coated par... | 04/01/2008 |
| 7343975 | Method for stimulating a well A bottomhole assembly (BHA) and method for stimulating a well includes setting a packer of the BHA in a wellbore. The BHA includes the packer and a jetting tool coupled to a tubing string. Process fluid is pumped down the tubing string and jetted with the jetting to... | 03/18/2008 |
| 7345011 | Methods for mitigating the production of water from subterranean formations The present invention relates to treatment operations in subterranean zones, and more particularly, to consolidation compositions and methods of using these consolidation compositions to mitigate water production from subterranean formations. The present invention p... | 03/18/2008 |
| 7343973 | Methods of stabilizing surfaces of subterranean formations A method of treating a subterranean formation or of stabilizing a surface within a subterranean fracture comprising: providing a treatment fluid comprising lightweight proppant at least partially coated with an adhesive substance; introducing the treatment fluid int... | 03/18/2008 |
| 7334636 | Methods of creating high-porosity propped fractures using reticulated foam One embodiment of the prevent invention provides a method of creating a high porosity propped fracture comprising creating a slurry comprising a treatment fluid, proppant particulates, pieces of reticulated foam having cells, and an adhesive substance such that the ... | 02/26/2008 |
| 7334635 | Methods for fracturing subterranean wells A method of forming a propped fracture comprising: providing a fracture having a far-well bore area and a near-well bore area; placing first proppant particulates at least partially coated with an adhesive substance; placing a portion of second proppant particulates... | 02/26/2008 |
| 7331389 | Re-use of recovered treating fluid Treating fluid production and subterranean formation treating methods as well as treating fluid compositions that reuse at least part of a prior treating fluid, particularly a fluid having one or more constituents that can be relinked. This includes conditioning a s... | 02/19/2008 |
| 7332343 | Determining enantiomeric excess using indicator-displacement assays The invention includes an enantioselective indicator-displacement assay useful to determine enantiomeric excess (ee) enantiomeric samples calorimetrically. Determination may be by inspection of color with the naked eye, spectrographic measurement, or mathematical ca... | 02/19/2008 |
| 7328744 | Methods and compositions for treating subterranean formations with gelled hydrocarbon fluids In one embodiment, a method of treating a subterranean formation is provided comprising the steps of providing a gelled liquid hydrocarbon treatment fluid comprising a liquid hydrocarbon and a gelling agent that comprises a polyvalent metal salt of an organophosphon... | 02/12/2008 |
| 7325613 | Crosslinkable polymer compositions comprising phenols and associated methods Crosslinkable-polymer compositions that comprise a chitosan-based compound and a phenol source, and associated methods, are provided. Various methods of use are also provided. In one embodiment, the methods comprise providing a crosslinkable-polymer composition comp... | 02/05/2008 |
| 7325608 | Methods of hydraulic fracturing and of propping fractures in subterranean formations Methods that comprise: providing a carrier fluid comprising a delayed breaker; providing a plurality of proppant aggregates comprising a binder fluid and a filler material; suspending the plurality of proppant aggregates in the carrier fluid; introducing the carrier... | 02/05/2008 |
| 7325615 | Viscosified treatment fluids comprising polycarboxylic acid gelling agents and associated methods Novel polycarboxylic acid copolymer gelling agents and viscosified treatment fluids comprising these gelling agents, and their associated methods of use and manufacture are provided. In one embodiment, a method comprising: providing a viscosified treatment fluid com... | 02/05/2008 |
| 7322412 | Casing shoes and methods of reverse-circulation cementing of casing A method having the following steps: running a circulation valve comprising a reactive material into the well bore on the casing; reverse-circulating an activator material in the well bore until the activator material contacts the reactive material of the circulatio... | 01/29/2008 |
| 7322414 | Crosslinkable-polymer compositions and associated methods Crosslinkable-polymer compositions are provided that may be useful for, among other things, reducing, stopping, or diverting the flow of fluids in subterranean formations. The crosslinkable-polymer compositions may comprise an aqueous fluid, a chitosan-reacting poly... | 01/29/2008 |
| 7318473 | Methods relating to maintaining the structural integrity of deviated well bores Methods of enhancing at least partially the structural integrity of a longitudinal portion of a deviated well bore are provided. The methods include providing a gravel matrix composition; providing a longitudinal portion of a deviated well bore; and placing a suffic... | 01/15/2008 |
