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| Number | Title | Issue Date |
| 7997338 | Sealing feed through lines for downhole swelling packers A swelling element on a packer has a trough formed on a longitudinal axis. The control line or cable or conduit that needs to run along the string where the packer is mounted is first wrapped in a preferably non-swelling underlayment that can be a loose scroll or ha... | 08/16/2011 |
| 7434616 | System and method for fluid control in expandable tubing In accordance with the teachings of the present invention, a system and method for forming a seal within tubing is provided. A section of tubing is installed in a borehole. The tubing has an inflatable element disposed along an inner surface of the tubing. The infla... | 10/14/2008 |
| 7363980 | Downhole flow control apparatus, operable via surface applied pressure Flow control apparatus, for placement in a downhole location in the tubing string of a well. The apparatus comprises a valve element and a lock element. Application and removal of annulus pressure (on the annulus between the tubing and the casing) permits the appara... | 04/29/2008 |
| 7353878 | Apparatus and method for wellbore isolation An apparatus for isolating a selected leg of a wellbore from the remainder of the wellbore includes a packer positionable in the selected leg of the wellbore, a tube extending through the packer from an uphole side of the packer to a downhole side of the packer to p... | 04/08/2008 |
| 7264061 | Well packer for a pipe string and a method of leading a line past the well packer The invention concerns an external well packer (4, 4′, 4″) for a pipe string (2), and also a method of leading at least one line (18) seamlessly past at least one packer (4, 4′, 4″) along the pipe string (2). What is charac... | 09/04/2007 |
| 7172029 | Bi-directionally boosting and internal pressure trapping packing element system The present invention is a packer for sealing an annular region in a wellbore. The packer includes a packing element which is held through bidirectional forces. The packer first comprises an inner mandrel. Disposed around the inner mandrel are three tubulars: (1) a ... | 02/06/2007 |
| 7163066 | Gravity valve for a downhole tool A gravity valve for a downhole tool for use in a subterranean well and a method of use thereof. The gravity valve is adapted to control the flow of a dowuhole fluid through the downhole tool. The gravity valve typically includes a plunger and a seat. The plunger may... | 01/16/2007 |
| 7147059 | Use of downhole high pressure gas in a gas-lift well and associated methods A gas-lift petroleum well and method for producing petroleum products using downhole pressurized gas to provide lift. The gas-lift well having a well casing, a production tubing, a packer, and a gas-lift valve. The well casing extends within a wellbore of the well, ... | 12/12/2006 |
| 7100693 | Process for pressure stimulating a well bore through a template One or more templates are provided for circulating fluids in a main well bore and for drilling and completing at least one offset well bore from the main well bore. Each template has a body, an inlet leg, a main outlet leg, and an offset outlet leg. A straddle assem... | 09/05/2006 |
| 7063152 | Model HCCV hydrostatic closed circulation valve Devices and methods for methods for cleaning of excess cement from a production assembly as well as from the annulus surrounding the production assembly. A hydrostatic closed circulation valve (HCCV) assembly is described that is primarily actuatable between open an... | 06/20/2006 |
| 7021384 | Apparatus and method for wellbore isolation An apparatus for isolating a selected leg of a wellbore from the remainder of the wellbore includes a packer positionable in the selected leg of the wellbore, a tube extending through the packer from an uphole side of the packer to a downhole side of the packer to p... | 04/04/2006 |
| 7004248 | High expansion non-elastomeric straddle tool The present invention involves a pack-off system for use in packing off an area of interest within a wellbore. The pack-off system comprises at least two packing elements disposed on a tubular body. The packing elements of the present invention comprise overlapping ... | 02/28/2006 |
| 6959762 | Method and apparatus for formation damage removal A method for evaluating the permeability and formation damage in the porous rock around a well bore. This method relates to the use of a single string coiled tubing and a down hole assembly which includes a microcontroller, an electrically operable fluid control val... | 11/01/2005 |
| 6942039 | Flapper valve and associated method for single trip retrieval of packer tools A method of providing for a single trip removal of packer tools by providing a flapper valve in the upper packer tools which opens when pressure below the tool exceeds the pressure above the tool to allow the tools to be released and allowing flow up the center of t... | 09/13/2005 |
| 6938698 | Shear activated inflation fluid system for inflatable packers A subterranean well packer is inflated by a pumped transfer of rheotropic fluid through a tortuous flow channel into a packer sealing element expansion chamber. The tortuous flow channel and fluid delivery pressure are coordinated with the fluid properties to impose... | 09/06/2005 |
| 6902008 | Bi-directionally boosting and internal pressure trapping packing element system Present invention is a packer for sealing an annular region in a wellbore. The packer includes a packing element which is held through bi-directional forces. The packer first comprises an inner mandrel. Disposed around the inner mandrel are three tubulars: (1) a top... | 06/07/2005 |
| 6866095 | Downhole safety valve for central circulation completion system A downhole safety valve for a central circulation completion system having concentric inner and outer tubular members defining a production bore therebetween comprises a generally cylindrical body which includes an outer surface which is sealed to the outer tubular ... | 03/15/2005 |
| 6799638 | Method, apparatus and system for selective release of cementing plugs A running tool for wiper plugs used in cementing well casings into a wellbore. The running tool and setting balls or darts used to launch the plugs are retrievable following deployment of the plugs. Flapper valve assemblies on the wiper plugs are activated after the... | 10/05/2004 |
| 6719046 | Apparatus for controlling the annulus of an inner string and casing string A apparatus is disclosed for attaching and sealing to the upper end of the casing allowing the inner string to be run through the apparatus. The apparatus provides a latch for anchoring the inner string and a seal for sealing on the inner string. Also disclosed is a... | 04/13/2004 |
| 6615926 | Annular flow restrictor for electrical submersible pump A method of pumping well fluid from a well having casing with perforations includes connecting an electrical motor to a lower end of a pump and securing the pump to tubing. A restrictor is mounted to the tubing above the pump, the restrictor having a rest... | 09/09/2003 |
| 6564876 | Packer A packer for use inside a casing of a subterranean well includes a resilient element, a housing and a rupture disc. The resilient element is adapted to seal off an annulus of the well when compressed, and the housing is adapted to compress the resilient e... | 05/20/2003 |
| 6540019 | Intelligent thru tubing bridge plug with downhole instrumentation A conventional thru tubing bridge plug is rendered in a more effective and useful downhole tool by incorporating a sensor module complete with preferably a plurality of downhole sensors to monitor downhole parameters such as but not limited to temperature... | 04/01/2003 |
| 6530428 | Method and apparatus for in-situ production well testing An apparatus for in situ borehole testing having a drill string with drill pipe and drill bit. An upper sleeve and lower sleeve are telescopically coupled together. A valve seat is located in an interior passage and closes the interior passage when a valv... | 03/11/2003 |
| 6427773 | Flow through bypass tubing plug A tubing plug is adapted for insertion into a tubing string for sealing the tubing string. The tubing plug is comprised of a housing having an outer surface, wherein the housing is adapted for insertion in the tubing string such that an annulus is defined... | 08/06/2002 |
| 6343650 | Test, drill and pull system and method of testing and drilling a well A test, drill and pull system for testing a well formation or zone of interest and further drilling of the well in a single trip into the wellbore. The system includes a surface readout tester valve, a rotation-operated reversing valve, a resettable packe... | 02/05/2002 |
| 6321836 | Utilization of energy from flowing fluids A fluid powered downhole vibration tool used in a well bore having fluids under pressure. The tool includes a resonant chamber with a through passage in communication with the fluids under pressure wherein the chamber vibrates as the fluids pass through t... | 11/27/2001 |
| 6305878 | Adjustable depth air sparging well An adjustable depth air sparging well comprising a flow through packer which is slidably mounted within a well casing allowing for vertical movement of the flow through packer within the well casing. Flow through packer includes an inflatable packer fabri... | 10/23/2001 |
| 6269878 | Drillable inflatable packer and methods of use An inflatable packer with a packer body, an inflatable bladder mounted around the packer body, a bladder support mounted around the inflatable bladder, the packer body, the inflatable bladder and the bladder support made of drillable material. A method fo... | 08/07/2001 |
| 6247533 | Utilization of energy from flowing fluids A fluid powered downhole vibration tool used in a well bore having fluids under pressure. The tool includes a resonant chamber with a through passage in communication with the fluids under pressure wherein the chamber vibrates as the fluids pass through t... | 06/19/2001 |
| 6186227 | Packer A packer for use inside a casing of a subterranean well includes a resilient element, a housing and a rupture disc. The resilient element is adapted to seal off an annulus of the well when compressed, and the housing is adapted to compress the resilient e... | 02/13/2001 |
| 6109357 | Control line actuation of multiple downhole components One or more downhole tools can be set using an apparatus and method where a control line runs outside a tubular string. The string and downhole tools do not have lateral penetrations and the downhole tool(s) are actuated externally from the control line w... | 08/29/2000 |
| 6059031 | Utilization of energy from flowing fluids A fluid powered downhole vibration tool used in a well bore having fluids under pressure. The tool includes a fluid powered motor located within the well bore, the fluid powered motor is in communication with the fluids under pressure. An actuator couplin... | 05/09/2000 |
| 5954137 | Apparatus and method for avoiding formation impairment during completion of wellbores Completion method for avoiding formation impairment in the completion of a wellbore by anchoring and activating a plug at a selected position in the wellbore to seal off a selected portion of the wellbore from other portions of the wellbore. The plug is p... | 09/21/1999 |
| 5924696 | Frangible pressure seal A frangible sealing disk for use downhole in combination with packer components. The sealing disk is a molded ceramic disk having a circular seating face and extending centrally through a dome-shaped seal. The seal is preferred for use in combination with... | 07/20/1999 |
| 5782298 | Retrievable safety packer The invention relates to a safety packer assembly for use in a cement-lined pipe. The assembly provides for the use of a packer body which carries one or more resilient collars that expand in response to a compression force created by rotation of an upper... | 07/21/1998 |
| 5782306 | Open hole straddle system A set of inflatable well packing elements are separated by a variable length of tubing and are set in a well to isolate a segment of the annulus by applying fluid under pressure through a tubing string to the well packing elements. The flow of the fluid u... | 07/21/1998 |
| 5775422 | Tree test plug A test plug for sealing a bore within a tubing hanger comprising an annular plug body having an axial bore extending therethrough, the axial bore forming a tapered annular seat and an enlarged receptacle within the plug body; a plurality of support dogs r... | 07/07/1998 |
| 5579841 | Plugs for well logging operations A hollow body is provided with a seal by which it may be sealed within a nipple profile included in a tubing string. The body allows a wireline to be passed through it while maintaining a substantial seal. During running-in lower collet fingers engage a s... | 12/03/1996 |
| 5400855 | Casing inflation packer A casing inflation packer for use in a casing string in a well bore. The apparatus includes a housing connected in the casing string. An inflatable packer portion on the housing sealingly engages the well bore when inflated. An inflation passageway is def... | 03/28/1995 |
| 5343945 | Downholde gas/oil separation systems for wells Oil and gas are separated downhole in a free flowing well and are transmitted separately to the surface. Liquid oil is transmitted through an elongated tubing which extends into a liquid column in the bottom of the well and is anchored in a liquid product... | 09/06/1994 |
