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| Number | Title | Issue Date |
| 8127831 | Wellbore method and apparatus for sand and inflow control during well operations Method and apparatus for producing hydrocarbons including a wellbore that accesses a subsurface reservoir; a production tubing string disposed within the wellbore; and sand control devices coupled to the production tubing string. At least one of the sand control dev... | 03/06/2012 |
| 7784532 | Shunt tube flowpaths extending through swellable packers Shunt tube flowpaths extending through swellable packers. A well system includes a packer assembly including a base pipe and an annular seal element which is swellable in response to contact with a selected fluid, and a shunt tube flowpath extending through the seal... | 08/31/2010 |
| 7559357 | Frac-pack casing saver A deflection device keeps high velocity gravel slurry flow from directly impinging the wellbore wall in open hole and breaking loose the filter cake coating on the wall or, in a cased hole, prevents the direct impingement of gravel slurry on the casing which can cau... | 07/14/2009 |
| 7503384 | Multiple port cross-over design for frac-pack erosion mitigation A system for use in gravel packing operations wherein a gravel placement mandrel defines an axial flowbore and two or more lateral slurry flow ports for communication of slurry from the flowbore to the interior of the wear sleeve/blast liner. The slurry flow ports a... | 03/17/2009 |
| 7431085 | Gravel pack multi-pathway tube with control line retention and method for retaining control line A gravel pack multi-pathway tube includes a body and a flow passage at the body. Further, the tube includes a projection at the body, the projection receptive to a control line. A gravel packing device component wherein the component includes a shroud, a multi-pathw... | 10/07/2008 |
| 7419004 | Method of gravel packing with oil-based carrier fluid A method is disclosed for gravel packing a hole in a subterranean formation including the step of pumping into the hole a gravel pack composition comprising gravel and a carrier fluid comprising a brine-in-oil emulsion, said emulsion being stabilized by an emulsifie... | 09/02/2008 |
| 7407007 | System and method for isolating flow in a shunt tube A technique is provided to selectively control flow along shunt tubes, such as those used in gravel pack operations. The technique utilizes a swellable material valve that comprises a swellable material deployed along the shunt tube flow path. When flow through a sp... | 08/05/2008 |
| 7401648 | One trip well apparatus with sand control An apparatus and method for drilling a well bore, placing a liner, cementing and perforating the liner, and injecting or producing fluid, sand-free, through the perforations. The liner has a plurality of outwardly extendable elements for perforation and sand control... | 07/22/2008 |
| 7395859 | Method for growth of a hydraulic fracture along a well bore annulus and creating a permeable well bore annulus A method for growth of a hydraulic fracture or a tall frac is described wherein the tall frac is disposed next to a well bore using a sandpacked annulus. Also, a method for creating a permeable well bore annulus is disclosed. The method for creating the tall frac in... | 07/08/2008 |
| 7383884 | Cross-over tool A well system comprising an improved cross-over tool is provided. The tool may comprise a debris shield for substantially preventing sand, proppant or other well debris from fouling a flow port closing sleeve located below the cross-over tool fracture ports; a retur... | 06/10/2008 |
| 7377320 | Apparatus and method for gravel packing An improved apparatus and method for gravel packing is provided. The apparatus includes a substantially tubular-shaped base pipe having a plurality of apertures disposed along part of its length and a dual-wall sand screen coaxially secured to the base pipe. The dua... | 05/27/2008 |
| 7373978 | Method for drilling and completing wells A method for drilling and completing a gravel packed well is disclosed. The method comprises drilling a wellbore with a drilling fluid, conditioning the drilling fluid, running the gravel packing assembly tools to depth in the wellbore with the conditioned drilling-... | 05/20/2008 |
| 7373979 | Workstring and a method for gravel packing Disclosed is a workstring for use in a gravel packing system. The workstring includes a washpipe with at least one port and a selectively openable and closeable closure mechanism in operable communication with the at least one port. Further disclosed is a col... | 05/20/2008 |
| 7370700 | Multiple entrance shunt Multiple pathways are provided by which fluid can enter one or more alternate pathway conduits. Entrance tubes can be arranged such that their spacing prevents all of them from being simultaneously obstructed, covered, or otherwise blocked. ... | 05/13/2008 |
| 7367395 | Sand control completion having smart well capability and method for use of same A sand control completion (100) for installation in a wellbore (102) includes first and second packers (114, 116) that define a first zone (110) in the wellbore (102). A production tubing (120) extends substantially through ... | 05/06/2008 |
| 7363974 | Gravel packing a well A technique that is usable with a subterranean well includes communicating a slurry through a shunt flow path and operating a control device to isolate slurry from being communicated to an ancillary flow path. The system may include a shunt tube and a diverter. The ... | 04/29/2008 |
| 7347289 | Dart-operated big bore by-pass valve A by-pass tool is provided which has a large bore throughflow passage when in an inactive drilling mode, and which is capable of being activated upon launching of an activation dart from the surface, to an active mode in which drillstring fluids can be diverted to a... | 03/25/2008 |
| 7337840 | One trip liner conveyed gravel packing and cementing system A well completion assembly including apparatus for gravel packing and cementing in a single trip. An outer assembly comprises: a liner and screen; a valved gravel packing port; upper and lower valved cementing ports; and seal bores positioned below and above the gra... | 03/04/2008 |
| 7331388 | Horizontal single trip system with rotating jetting tool A method for completing a well in a single trip is described, which includes inserting a completion tool assembly into the wellbore. The completion tool assembly includes a gravel packing assembly having a central channel substantially therethrough and a service too... | 02/19/2008 |
| 7325616 | System and method for completing multiple well intervals A system and method for completing a well with multiple zones of production includes a casing having a plurality of flapper valves integrated therein for isolating each well zone and a perforating gun string for selectively perforating the casing and underlying form... | 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 |
| 7303014 | Casing strings and methods of using such 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... | 12/04/2007 |
| 7303008 | Methods and systems 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; ... | 12/04/2007 |
| 7296624 | Pressure control apparatus and method Pressure control in an isolated lower wellbore annulus, defined by a conduit sealably positioned within an isolated lower wellbore segment, is achieved while gravel packing by sensing the pressure within the isolated lower annulus while gravel packing and admitting ... | 11/20/2007 |
| 7290612 | Apparatus and method for reverse circulation cementing a casing in an open-hole wellbore The present invention is directed to an apparatus and method for reverse circulation cementing a casing in an open-hole wellbore. The apparatus includes a surface pack-off device, which has a housing defined by an upper section and lower section. A load bearing plat... | 11/06/2007 |
| 7290610 | Washpipeless frac pack system A frac pack system and method for operating a frac pack system wherein an isolation string assembly has a lower circulation valve with lateral flow ports that are operated to an open position without the use of shifters on a wash pipe. The isolation string assembly ... | 11/06/2007 |
| 7290611 | Methods and systems for cementing wells that lack surface casing Methods and systems for cementing casing in well bores drilled in subterranean formations, and more particularly, methods and systems for cementing casing in a well bore without surface casing or a well head are provided. A method provided herein may comprise sealin... | 11/06/2007 |
| 7287596 | Method and apparatus for stimulating hydrocarbon wells One or more flapper valve assemblies are placed in a casing string extending through one or more hydrocarbon bearing intervals. The flapper valve assemblies are placed between some of the hydrocarbon bearing intervals. In an open or inoperative position, the flapper... | 10/30/2007 |
| 7284608 | Casing strings and methods of using such strings in subterranean cementing operations Improved casing strings, and methods of using improved casing strings in subterranean operations, are provided. An example of a method is a method of cementing a pipe string in a subterranean formation. Another example of a method is a method of cementing a pipe str... | 10/23/2007 |
| 7275595 | Method and apparatus to isolate fluids during gravel pack operations The present invention provides for an apparatus and method to displace fluids and to prevent the mixing or bypassing of fluids used in gravel pack operations. A moveable plug is used to create a physical partition between fluids. ... | 10/02/2007 |
| 7270191 | Flapper opening mechanism Methods and devices for operation of a flapper valve. A valve assembly is described with a flapper element and a valve opening assembly that will mechanically open the flapper element. The valve opening assembly is particularly valuable where the flapper element fai... | 09/18/2007 |
| 7258054 | Continuous explosive charge assembly for use in an elongated cavity A method and apparatus for placement of continuous pre-split, gel explosive in an elongated borehole or cavity. An anchor is attached to one end of a selected length of continuous gel explosive. A suitable anchor is a flexible, plastic “pilgrim's hat” with a hol... | 08/21/2007 |
| 7252147 | Cementing methods and systems for initiating fluid flow with reduced pumping pressure A method of initiating fluid circulation in a well bore through a casing inner diameter and an annulus outside the casing, the method having the following steps: inducing an increase in the annulus fluid pressure; flowing cement composition into the annulus at the t... | 08/07/2007 |
| 7243723 | System and method for fracturing and gravel packing a borehole A system and method for fracturing an earth formation surrounding a borehole includes an elongate conduit positioned in the borehole. A packer assembly is provided about the conduit and is adapted to seal an annulus between the conduit and the borehole. A packing pa... | 07/17/2007 |
| 7243715 | Mesh screen apparatus and method of manufacture The present invention provides for a design and method of manufacture for a mesh-type screen to be used in subsurface well completions to prevent the production of sand. ... | 07/17/2007 |
| 7243724 | Apparatus and method for treating an interval of a wellbore An apparatus (110) and method for treating an interval of a wellbore comprises an outer tubular (112) disposed within the wellbore. A sand control screen (118) is disposed within the outer tubular (112). A treatment fluid passageway (1... | 07/17/2007 |
| 7240378 | Flange valve A flange valve to deter entry of rodents and pests, insertable on existing devices, comprising a unidirectional swinging door attached on an inner wall of a frame, the door and the inner wall of the frame having a clearance between them of a dimension not allowing e... | 07/10/2007 |
| 7240739 | Well fluid control A well conduit that has an aperture for communicating with a target reservoir and a one-way valve in the aperture may be used in injection and production wells. Other devices, systems, methods, and associated uses are also included in the present invention. For exam... | 07/10/2007 |
| 7237611 | Zero drill completion and production system The present invention is a method and apparatus for a one trip completion of fluid production wells. A completion tool string includes a pressure activated cementing valve, an external casing packer, a pressure activated production valve, an opening plug and a plug ... | 07/03/2007 |
| 7228900 | System and method for determining downhole conditions The present invention provides a system for determining downhole conditions including a time domain reflectometer (172) that is operable to generate a transmission signal and receive a reflected signal. A tubular (192) is positioned downhole in a downh... | 06/12/2007 |
