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| Number | Title | Issue Date |
| 8171994 | Multi-position valve for fracturing and sand control and associated completion methods A completion tubular is placed in position adjacent the zone or zones to be fractured and produced. It features preferably sliding sleeve valves that can assume at least two configurations: wide open and open with a screen material juxtaposed in the flow passage. In... | 05/08/2012 |
| 8157011 | System and method for performing a fracture operation on a subterranean formation A system and method for performing a fracture operation on a well site having a subterranean formation with a reservoir therein. The method involves measuring at least one seismic wave before and after stimulating the subterranean formation, comparing the seismic wa... | 04/17/2012 |
| 8151886 | Open hole stimulation with jet tool A fracturing method for preferably open hole uses fluid velocity impinging on the wellbore wall to initiate fractures. Telescoping members that extend using nozzles inside them but come out to a distance from the wellbore wall can be used. Fixed nozzles that do not ... | 04/10/2012 |
| 8127849 | Method of using lightweight polyamides in hydraulic fracturing and sand control operations Lightweight polyamide particulates may be used in treatment of subterranean formations, including hydraulic fracturing and sand control methods, such as gravel packing. The polyamide particulates typically have an apparent specific gravity (ASG) between from about 1... | 03/06/2012 |
| 8127850 | Method of treating subterranean formations using sequential proppant stages An increase in effective propped lengths is evidenced in hydraulic fracturing treatments by the use of ultra lightweight (ULW) proppants. The ULW proppants have a density less than or equal to 2.45 g/cc and may be used as a mixture in a first proppant stage wherein ... | 03/06/2012 |
| 8104539 | Bottom hole assembly for subterranean operations Methods and systems for stimulating a wellbore. A coil tubing bottom hole assembly is disclosed which includes a jetting tool. A non-caged ball sub is coupled to the jetting tool and a ported sub is coupled to the non-caged ball sub. Additionally, a caged ball sub i... | 01/31/2012 |
| 8104538 | Fracturing with telescoping members and sealing the annular space A fracturing operation is done in open hole. The annular space is spanned by telescoping members that are located behind isolation valves. A given bank of telescoping members can be uncovered and the telescoping members extended to span the annular space and engage ... | 01/31/2012 |
| 8096361 | Stimulated oil production using reactive fluids A method of stimulating production from a subterranean formation penetrated by a wellbore, comprising pumping a fluid from the well into the formation so as to create a hydraulic fracture. The fluid contains one or more reactive species that destabilize cohesive for... | 01/17/2012 |
| 8061427 | Well product recovery process A process for fracturing a selected region of a formation including: introducing a supply of fracturing fluid to the region of the formation until a first threshold is reached, adjusting the flow of the fracturing fluid to the region of the formation to reach a seco... | 11/22/2011 |
| 7967069 | Active seismic monitoring of fracturing operations A method for managing a fracturing operation. In one implementation, the method may include positioning a seismic source and at least one seismic receiver near a hydrocarbon reservoir; pumping a fracturing fluid into a well bore of the hydrocarbon reservoir; perform... | 06/28/2011 |
| 7958937 | Process for hydrofracturing an underground aquifer from a water well borehole for increasing water flow production from Denver Basin aquifers A process for hydrofracturing a specific interval or zone in a water aquifer from a water well borehole and introducing high-pressure water and gravel proppants for increasing water flow production from the water well. The process uses a hydrofracture tool having a ... | 06/14/2011 |
| 7938188 | Completion method with telescoping perforation and fracturing tool An apparatus and method for perforating a liner, fracturing a formation, and injection or producing fluid, all in one trip with a single tool. The tool has a plurality of outwardly telescoping elements (12, 14) for perforation and fracturing. The tool also ha... | 05/10/2011 |
| 7931087 | Method of fracturing using lightweight polyamide particulates Lightweight polyamide particulates may be used in treatment of subterranean formations, including hydraulic fracturing and sand control methods, such as gravel packing. The polyamide particulates typically have an apparent specific gravity (ASG) between from about 1... | 04/26/2011 |
| 7931088 | Methods for treating a well by simultaneously introducing into a mixer streams of water, a viscosity-increasing agent, and a particulate and introducing the mixture into the well A method is provided for treating at least a portion of a well. The method includes the steps of: (a) simultaneously introducing into a mixer at least: (i) a first stream comprising water; (ii) a second stream comprising a dry, hydratable, viscosity-increasing agent... | 04/26/2011 |
| 7921914 | Combined three-in-one fracturing system A three-in-one fracturing system is provided, which combines on a single trailer that can be pulled by a single tractor, a blending system for blending a fracturing fluid, a fluid pumping system for pumping the fracturing fluid into the well, and a data cabin for mo... | 04/12/2011 |
| 7882895 | Method for impulse stimulation of oil and gas well production A method for fracturing an oil or gas formation. The method includes introducing a gas impulse device into a wellbore followed by pumping a pressurized liquid into a wellbore at a pressure equal to or lower than the estimated fracture pressure of the formation. Fina... | 02/08/2011 |
| 7857056 | Hydrocarbon recovery from impermeable oil shales using sets of fluid-heated fractures An economic method for in situ maturing and production of oil shale or other deep-lying, impermeable resources containing immobile hydrocarbons. Vertical fractures are created using horizontal or vertical wells. The same or other wells are used to inject pressurized... | 12/28/2010 |
| 7828063 | Rock stress modification technique A technique involves facilitating fracturing operations along a wellbore extending through a subterranean formation. A stress device is deployed in a wellbore and activated to engage a surrounding wall. The stress device can then be manipulated to create a reduced s... | 11/09/2010 |
| 7819193 | Parallel fracturing system for wellbores Downhole fracturing tools comprise upper and lower isolation devices and a housing disposed in between. The housing comprises a housing bore that is divided into two chambers isolated from each other within the housing bore. The upper bore is in fluid communication ... | 10/26/2010 |
| 7814981 | Fracture valve and equalizer system and method Disclosed herein is an equalizer and fracture valve system. The system includes, a tubular, at least one fracture valve disposed at the tubular is openable and closeable to flow therethrough, and at least one equalizer disposed at the tubular is openable to flow the... | 10/19/2010 |
| 7810570 | Shock-release fluid fracturing method and apparatus A shock tool is adapted to a bottom hole tool assembly for isolating a zone in a subterranean formation accessed by a wellbore. Fracturing fluid such as nitrogen is accumulated at fracturing pressures uphole of the shock tool for subsequent and rapid release to the ... | 10/12/2010 |
| 7798227 | Methods for placing multiple stage fractures in wellbores A production tubing comprising a liner is placed downhole in a wellbore. A fluid pill containing proppant is squeezed into the annulus between the formation and liner, thereby packing the proppant into the annulus, effectively isolating the annulus. The packed propp... | 09/21/2010 |
| 7784545 | In-situ method of fracturing gas shale and geothermal areas A method is provided for in-situ production of oil shale, gas via gas (methane) hydrates and gas shale, and steam via geothermal formations wherein a network of fractures is formed by injecting liquified gases into at least one substantially horizontally disposed fr... | 08/31/2010 |
| 7766083 | Methods of isolating hydrajet stimulated zones The present invention is directed to a method of isolating hydrajet stimulated zones from subsequent well operations. The method includes the step of drilling a wellbore into the subterranean formation of interest. Next, the wellbore may or may not be cased dependin... | 08/03/2010 |
| 7757770 | Method of stimulating a coalbed methane well A method of stimulating gas production from a coalbed methane well that involves injecting a foam forming liquid and an expandable fluid into a coal seam proximate the wellbore. When the wellbore pressure is reduced, at least a portion of the expandable fluid can va... | 07/20/2010 |
| 7748458 | Initiation and propagation control of vertical hydraulic fractures in unconsolidated and weakly cemented sediments A method and apparatus for initiating and propagating a vertical hydraulic fracture in unconsolidated and weakly cemented sediments from a single bore hole to control the fracture initiation plane and propagation of the hydraulic fracture, enabling greater yield and... | 07/06/2010 |
| 7748457 | Injection of treatment materials into a geological formation surrounding a well bore Methods and systems for creating fractures in a geological formation surrounding a well bore. In one implementation, a treatment material may be disposed at the bottom of the well bore. One or more propellant apparatuses may be immersed in the treatment material and... | 07/06/2010 |
| 7748459 | Annular pressure monitoring during hydraulic fracturing A pressure or flow responsive valve is provided in a hydraulic fracturing assembly so that if the formation sands out during proppant pumping and pressure in the bypass to the annulus around the work string rises, the bypass is closed by the valve to prevent overpre... | 07/06/2010 |
| 7740072 | Methods and systems for well stimulation using multiple angled fracturing Methods, systems, and apparatus for inducing fractures in a subterranean formation and more particularly methods and apparatus to place a first fracture with a first orientation in a formation followed by a second fracture with a second angular orientation in the fo... | 06/22/2010 |
| 7730951 | Methods of initiating intersecting fractures using explosive and cryogenic means Methods and systems that utilize explosive and cryogenic means to establish fluid communication to areas away from the well bore walls are disclosed. A first fracture is induced in the subterranean formation. The first fracture is initiated at about a fracturing loc... | 06/08/2010 |
| 7726403 | Apparatus and method for ratcheting stimulation tool A method and apparatus for ratcheting a stimulation tool in a well in which the stimulation tool is movable from a first radial position to a second radial position without moving the tool string. ... | 06/01/2010 |
| 7699107 | Mechanical and fluid jet drilling method and apparatus A device useful for conducting lateral or transverse excavating operations within a wellbore comprising a rotating drill bit with jet nozzles on a flexible arm. The arm can retract within the housing of the device during deployment within the wellbore, and can be ex... | 04/20/2010 |
| 7677315 | Degradable surfactants and methods for use The present invention provides a method of generating an acid downhole that comprise providing a degradable surfactant; introducing the degradable surfactant into a well bore that penetrates a subterranean formation; and allowing at least a portion of the degradable... | 03/16/2010 |
| 7677316 | Localized fracturing system and method A method and apparatus useful for fracturing subterranean formations with ultra high fluid pressure. The apparatus is capable of producing isolated pressure in a formation surrounding a primary wellbore, sufficient pressure is included within the formation for creat... | 03/16/2010 |
| 7588085 | Method to improve the injectivity of fluids and gases using hydraulic fracturing A method of improving injectivity of fluid, particularly produced water, in enhanced hydrocarbon recovery is disclosed. The method includes introducing a fracturing fluid into the subterranean formation to create a fracture, and introducing proppant into the fractur... | 09/15/2009 |
| 7584794 | Mechanical and fluid jet horizontal drilling method and apparatus A device useful for conducting lateral or transverse excavating operations within a wellbore comprising a rotating drill bit with jet nozzles on a flexible arm. The arm can retract within the housing of the device during deployment within the wellbore, and can be ex... | 09/08/2009 |
| 7559373 | Process for fracturing a subterranean formation A well may intersect a mineral bearing stratum. A fracturing fluid in the nature of a non-participating gas may be injected into the stratum at high rates of flow, to yield a high down hole pressure, and a time v. pressure pulse extending over a period of time. A se... | 07/14/2009 |
| 7546877 | Process for hydrofracturing an underground aquifer from a water well borehole for increasing water flow production from Denver Basin aquifers A process for hydrofracturing a specific interval or zone in a water aquifer from a water well borehole and introducing high-pressure water and gravel proppants for increasing water flow production from the water well. The process uses a hydrofracture tool having a ... | 06/16/2009 |
| 7540328 | Solid sandstone dissolver A dry solid composition is disclosed that, when added to an aqueous liquid, provides a slurry that can be used in sandstone acid fracturing. The slurry generates hydrofluoric acid downhole to etch the sandstone fracture faces created. The chemical and physical prope... | 06/02/2009 |
| 7516792 | Remote intervention logic valving method and apparatus A system of valves in which the valves operate over a designated pressure interval and are arranged to actuate performance of a sequenced set of events by downhole tools with the application of pressure to said valves. ... | 04/14/2009 |
