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| Number | Title | Issue Date |
| 8245776 | Wellhead system having wicker sealing surface A wellhead system comprising an outer wellhead housing, an inner wellhead member, and an annulus therebetween. The inner wellhead member, such as a casing hanger, is adapted to land in the outer wellhead housing. The outer wellhead housing may comprise a wickers for... | 08/21/2012 |
| 7422058 | Reinforced open-hole zonal isolation packer and method of use A packer device and methods of use for a packer within uncased wellbore to form a complete fluid seal. The packer device includes a central mandrel body that retains a plurality of nested, telescopic expanding elements that are moveable outwardly from the mandrel bo... | 09/09/2008 |
| 7413023 | Wellhead seal unit A wellhead seal unit for sealing a subsea oil and/or gas well at the wellhead. The unit comprises a sleeve, sealingly engaged to the workstring and to which, blow out preventer rams can engage. The unit allows the workstring to be rotated and reciprocated within the... | 08/19/2008 |
| 7357188 | Mono-diameter wellbore casing A mono-diameter wellbore casing is formed by radially expanding a first tubular liner off of a mandrel into contact with a second tubular liner. The first and second tubular liners are positioned within the wellbore in an overlapping relationship. The overlapping po... | 04/15/2008 |
| 7338265 | Scroll machine with single plate floating seal A scroll machine utilizes a floating seal to isolate pressurized fluid to provide axial biasing. The floating seal is designed as a single piece plate with inner and outer annular seals. The inner and outer annular seals can be U-shaped, V-shaped or L-shaped and eac... | 03/04/2008 |
| 7331581 | Inflatable packers Improved inflatable packers are provided. A packer may be constructed from hybrid structures including slat structures and weave structures. A packer may include a bladder and a cover, with a plurality of slats disposed therebetween, and/or a weave structure or anti... | 02/19/2008 |
| 7308935 | Rotary pump stabilizer A stabilizer is provided for stabilizing a rotary or progressive cavity pump suspended from production tubing in well casing. The stabilizer is connected between the production tubing and the pump. The stabilizer has a tubular body having a cylindrical wall and a lo... | 12/18/2007 |
| 7240728 | Expandable tubulars with a radial passage and wall portions with different wall thicknesses A tubular liner including a first tubular portion, a second tubular portion, and an intermediate tapered tubular portion coupled to, and positioned between, the first and second tubular portions. ... | 07/10/2007 |
| 7237810 | Plastic pipe adhesive joint A method of joining two pipe ends, by forming male threads on an end of a first pipe with a steep taper angle, forming matching female threads on an end of a second pipe, and applying adhesive material to the threads before twisting the pipes to fully engage the mal... | 07/03/2007 |
| 7182142 | Downhole apparatus Apparatus (10) for facilitating coupling and cementing of downhole tubulars (12, 28) comprises a tubing section (12, 10) for use in lining a bore. The tubing section has upper and lower ends and defines a tubing wall having cement outlets (20... | 02/27/2007 |
| 7172027 | Expanding tubing A method of expanding tubing downhole comprises providing a section of expandable tubing of a first diameter, and axially compressing the tubing to induce buckling, such that the buckled portion describes a larger second diameter. The resulting diametric expansion m... | 02/06/2007 |
| 7168497 | Downhole sealing A method of providing a downhole seal, such as a packer, in a drilled bore between inner tubing and outer tubing comprises: providing an intermediate tubing section defining a seal arrangement for engaging with the inner tubing; and radially plastically deforming th... | 01/30/2007 |
| 7168606 | Method of mitigating inner diameter reduction of welded joints Aspects of the present invention provide methods and apparatus for connecting two tubulars using a welding process with reduced inner diameter flash. The method includes connecting an end of a first expandable tubular to an end of a second expandable tubular using a... | 01/30/2007 |
| 7128145 | High expansion sealing device with leak path closures A high expansion packer or bridge plug is described. It features an external portion of a soft material that flows into spiral exterior leak paths formed when the sealing element is subjected to longitudinal compression. Preferably, the sealing element is an elastom... | 10/31/2006 |
| 7073583 | Method and apparatus for expanding tubing downhole Aspects of the invention relate to apparatus and methods for remedial and repair operations downhole. Certain embodiments of apparatus include a lightweight expandable member (22) that can be radially expanded to increased its inner and outer diameters using ... | 07/11/2006 |
| 7066259 | Bore isolation A method of isolating a section of a drilled bore containing a problem zone comprises: providing a section of tubing; locating the tubing in the section of the bore; and expanding the tubing and forming at least an outer portion of the tubing to conform to irregular... | 06/27/2006 |
| 7063142 | Method of applying an axial force to an expansion cone A method of applying an axial force to a first piston positioned within a first piston chamber including applying an axial force to the first piston using a second piston positioned within the first piston chamber. ... | 06/20/2006 |
| 7044221 | Apparatus for coupling a tubular member to a preexisting structure An apparatus for coupling a tubular member to a preexisting structure. ... | 05/16/2006 |
| 7040396 | Apparatus for releasably coupling two elements An apparatus for coupling two elements including an outer tubular member defining one or more outer tubular member slots, an inner tubular member defining one or more inner tubular member slots positioned within the outer tubular member, and a coupling assembly for ... | 05/09/2006 |
| 7021390 | Tubular liner for wellbore casing A method for expanding tubulars including providing an expandable tubing and a larger diameter tubing, wherein the larger diameter tubing has an expandable, tapering end portion; coupling an end portion of the expandable tubing to the expandable tapering end portion... | 04/04/2006 |
| 7004257 | Apparatus and methods for separating and joining tubulars in a wellbore The present invention provides methods and apparatus for cutting tubulars in a wellbore. In one aspect of the invention, a cutting tool having radially disposed rolling element cutters is provided for insertion into a wellbore to a predetermined depth where a tubula... | 02/28/2006 |
| 6997266 | Expandable hanger and packer A first tubular is disposed coaxially within a portion of a second, larger tubular. A portion of the first tubular is expanded into frictional contact with the second tubular, thereby creating a liner and a hanger. In one embodiment, a pattern of grooves and profile... | 02/14/2006 |
| 6976539 | Tubing anchor A method of installing a liner in a drilled bore below a section of bore previously lined with casing comprises the steps of: running a length of liner into the bore such that at least an upper end of the liner is positioned in overlapping relation with at least a l... | 12/20/2005 |
| 6971450 | Completion apparatus and methods for use in wellbores An apparatus and methods for preventing the accumulation of unwanted materials in an enlarged inner diameter portion of a casing or housing. In one aspect of the invention, a sleeve is disposed in the housing to isolate an annular area defined by the outer surface s... | 12/06/2005 |
| 6969070 | Split carrier annulus seal assembly for wellhead systems The seal assembly 10 seal between a subsea wellhead housing 12 and a casing hanger 16. A metal seal body 20 includes fingers 32 and 34 and one or more elastomeric seals 38. An upper seal body 64 may include thr... | 11/29/2005 |
| 6966370 | Apparatus for actuating an annular piston An apparatus comprising a first tubular member; a second tubular member positioned within and coupled to the first tubular member; a first annular piston chamber defined by the space between the first and second tubular members; an annular piston movably coupled to ... | 11/22/2005 |
| 6935429 | Flash welding process for field joining of tubulars for expandable applications The present invention generally relates to methods of connecting two expandable tubulars. In one aspect, the method includes flash welding the ends of the expandable tubulars together. Thereafter, the connected tubulars are lowered into the wellbore for expansion. T... | 08/30/2005 |
| 6932161 | Profiled encapsulation for use with instrumented expandable tubular completions The present invention provides an encapsulation for housing instrumentation lines, control lines, or instruments downhole. In one use, the encapsulation resides between an expandable downhole tool, such as an expandable sand screen, and the wall of the wellbore. The... | 08/23/2005 |
| 6923261 | Apparatus and method for expanding a tubular A method of isolating a section of downhole tubing comprises: running a length of expandable tubing (20) into a tubing-lined borehole (12, 14) and positioning the expandable tubing (20) across a section of tubing to be isolated; deforming at lea... | 08/02/2005 |
| 6920932 | Joint for use with expandable tubulars Embodiments of the present invention generally relate to a joint used with expandable sand screens and other expandable tubulars that permits elongation or contraction of the expandable tubulars during a tubular expansion operation within a wellbore. In one aspect, ... | 07/26/2005 |
| 6695067 | Wellbore isolation technique A wellbore isolation device having an expandable component. The expandable component comprises a layer of bistable cells that can be expanded from a contracted stable state towards an expanded stable state. A seal material may be placed along the expandab... | 02/24/2004 |
| 6695054 | Expandable sand screen and methods for use A particulate screen suitable for use in a wellbore. The particulate screen is expandable and may be at least partially formed of a bistable tubular. Also, a filter media may be combined with the bistable tubular to limit influx of particulates.... | 02/24/2004 |
| 6688400 | Downhole sealing A method of providing a downhole seal, such as a packer, in a drilled bore between inner tubing and outer tubing comprises: providing an intermediate tubing section defining a seal arrangement for engaging with the inner tubing; and radially plastically d... | 02/10/2004 |
| 6648071 | Apparatus comprising expandable bistable tubulars and methods for their use in wellbores A technique for connecting expandable tubulars. The technique comprises an expandable connector system that facilitates the connection of tubular components, such as tubulars used in wellbore environments.... | 11/18/2003 |
| 6622788 | External casing anchor A plurality of steel rings are crimped or shrink fitted onto a joint of steel well casing to produce the casing anchor. The rings and joint are sufficiently interlocked so that, when the anchor is cemented in a well, the joint can transfer axial load from... | 09/23/2003 |
| 6612372 | Two-stage downhole packer A two-stage packer and method for sealing an annulus in a wellbore is provided. The packer may be set by a force which will not cause a sealing element to buckle, collapse, or otherwise fail. In one aspect, the packer comprises a body having a sealing ele... | 09/02/2003 |
| 6595283 | Extrusion resistant inflatable tool Extrusion resistant inflatable tool having a biaxially oriented woven material disposed about at least one elastomeric element of the inflatable tool and radially inwardly of a rib structure of the inflatable tool. The woven material prevents extrusion of... | 07/22/2003 |
| 6530574 | Method and apparatus for expansion sealing concentric tubular structures A device and method for sealing a first cylinder in a fixed position inside a second concentric cylinder. The inner cylinder has an annular depression in its wall at the point of sealant placement, which causes the wall of the inner cylinder to intrude in... | 03/11/2003 |
| 6431271 | Apparatus comprising bistable structures and methods for their use in oil and gas wells Apparatus for use in a wellbore comprises (1) a first structure that comprises (a) at least one extendable member that can be reconfigured from a coiled form to an extended form, the member having a flattened transverse cross-section when in the coiled fo... | 08/13/2002 |
| 6425444 | Method and apparatus for downhole sealing A method of providing a downhole seal, such as a packer (12), in a drilled bore between inner tubing (11) and outer tubing (16) comprises: providing an intermediate tubing section (18) defining a seal arrangement for engaging with the inner tubing; and ra... | 07/30/2002 |
