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| Number | Title | Issue Date |
| 7819186 | Downhole tool Disclosed herein is a device that relates to a downhole tool. The tool comprising, a tool body having first and second support portions, and at least one extendable assembly pivotally mounted between the first and second support portions. The extendable assembly is ... | 10/26/2010 |
| 7810560 | Expansion joint with communication medium bypass An expansion joint with one or more communication medium bypass paths is described herein. At least some illustrative embodiments include a first axially flexible cylinder, one or more additional axially flexible cylinders positioned within the first cylinder, and f... | 10/12/2010 |
| 7806179 | String mounted hydraulic pressure generating device for downhole tool actuation Two subs are held in a fixed position relative to each other when assembled to a string and run into a wellbore. A reservoir of fluid is defined in a wall between the subs. The reservoir has one or more outlets connected by a short jumper line to an adjacent tool to... | 10/05/2010 |
| 7798213 | Radial spring latch apparatus and methods for making and using same New locking connector assemblies and telescoping extension/retraction assemblies are disclosed that operate on the natural spring rate constraints of radial protrusions or radially constrained rings as they interact with engaging members to provide the locking force... | 09/21/2010 |
| 7510003 | Downhole connection system A technique is provided in which a soft landing system is used for connecting upper and lower assemblies in a wellbore. The soft landing system cushions the engagement of an upper well assembly with a lower well assembly and facilitates the controlled engagement of ... | 03/31/2009 |
| 7413036 | Sub drilling sub A telescoping sub (50) for mining operations and the like. The telescoping sub (50) includes a rotor (94) portion coupleadle to the rotary head of a drilling rig, and a stator (74) portion that is coupleable to a drill rod. The rotor (... | 08/19/2008 |
| 7398822 | Downhole connection system A technique is provided in which a contraction joint is used to facilitate connection of well equipment assemblies at a downhole location. The contraction joint accommodates changes in system length during engagement and use or the well equipment assemblies in a wel... | 07/15/2008 |
| 7380596 | Downhold disconnect safety joint A safety joint that allows disconnection from a downhole section of a drill string without rotating the drill string. In an example class of embodiments, the innovative safety joint includes a sleeve with a j-slot that fits to a lug attached to the mandrel. A piston... | 06/03/2008 |
| 7353871 | Downhole automatic tool release and method of use A release tool adapted to be connected between a perforating gun and a tubing for releasing the perforating gun from the tubing after detonation of the perforating gun, the tool including a housing in connection with the tubing, the housing having an axial bore; an ... | 04/08/2008 |
| 7320363 | Energized slip ring assembly A slip ring assembly including a slip ring and an electrical contact assembly. The slip ring defines a circumference and an electrical contact groove extending around the circumference of the slip ring. The electrical contact assembly preferably includes a plurality... | 01/22/2008 |
| 7296639 | Wellstring assembly A wellstring assembly comprising a tubular first wellstring part with a passageway; a second wellstring part co-operating with the first wellstring part; and a releasable wellstring-interconnecting means for selectively interconnecting the first and second wellstrin... | 11/20/2007 |
| 7284606 | Downhole position locating device with fluid metering feature A tool for multiple purposes features one ore more dogs that can engage a collar groove or restriction sub in the wellbore. The dogs are extendable through a sleeve biased in opposed directions and are supported from a mandrel. The dogs can retract into mandrel groo... | 10/23/2007 |
| 7252150 | Downhole tool A downhole tool including a selectively releasable joint, a downhole drilling assembly including the downhole tool, and a corresponding method. In one embodiment of the invention, a downhole drilling assembly includes a downhole tool having a first body and a second... | 08/07/2007 |
| 7246659 | Damping fluid pressure waves in a subterranean well A system and method of damping fluid pressure waves in a subterranean well. In a described embodiment, pressure waves are damped by positioning a dampener in the well during a perforating operation. The dampener may attenuate the pressure waves by absorbing the pres... | 07/24/2007 |
| 7243728 | Sliding sleeve devices and methods using O-ring seals as shear members Devices and methods for releasably securing components of a device having a sliding sleeve arrangement to prevent premature actuation due to vibration. In a currently preferred embodiment, standard elastomeric O-rings are used as shear members. The O-ring shear memb... | 07/17/2007 |
| 7234522 | Apparatus and method for drilling a wellbore with casing and cementing the casing in the wellbore A float system for use in cementing a casing in a wellbore. The wellbore is drilled with a drill bit attached to the casing. The drill bit is removed after the wellbore is drilled. The float system is lowered into the casing after the drill bit is removed. The float... | 06/26/2007 |
| 7228898 | Gravel pack completion with fluid loss control fiber optic wet connect A gravel pack completion with fluid loss control and fiber optic wet connect. In a described embodiment, a system for completing a subterranean well includes multiple assemblies installed in a wellbore. Each assembly has a fiber optic line. The fiber optic lines are... | 06/12/2007 |
| 7210534 | Lock for a downhole tool with a reset feature The lock allows two members in a downhole tool to be temporarily held together. In an application where mandrel movement is dictated by pressure cycling in combination with a J-slot mechanism, such as in a downhole valve, the mandrel is releaseably retained to an ad... | 05/01/2007 |
| 7188672 | Well string assembly A well string assembly includes an upper tubular well string part having upper and lower ends between which there is formed a passageway, a lower well string part having upper and lower ends, which lower end is spaced apart from the lower end of the upper well strin... | 03/13/2007 |
| 7175176 | Device for feeding suction air or blowing air in a sheet-processing machine A device for feeding suction air or blowing air to a sheet-retaining device displaceable relative to a machine element in a sheet-processing machine, includes a first air-feeding element connectible in terms of flow to a suction-air or blowing-air source. A second a... | 02/13/2007 |
| 7174963 | Device and a method for disconnecting a tool from a pipe string A disconnection device for disconnecting a tool and a pipe string comprises a first connection part releasably connected to a second connection part by means of a locking device and a release object. The release object is soluble by means of, for example, acid. ... | 02/13/2007 |
| 7152674 | Disconnect devices A disconnect device for use as part of a tubing string downhole in an oil or gas well and which comprises a tubular body, at least one slip held within the tubular body, and a sleeve housed within the tubular body to hold the at least one slip in coupling engagement... | 12/26/2006 |
| 7090008 | System to connect conduit sections in a subterranean well An apparatus that is usable with a subterranean well includes a latch and an engagement mechanism. The latch is adapted to form a releasable connection between a first conduit section and a second conduit section in response to engagement of an actuator of the latch... | 08/15/2006 |
| 7083209 | Hydraulic overshot tool without a nozzle, and method of retrieving a cylinder The present invention provides an improved hydraulic overshot tool. The overshot tool mechanically engages a cylindrical body downhole attempting to be retrieved. In the event retrieval is unsuccessful, the overshot tool may be hydraulically released from the cylind... | 08/01/2006 |
| 7066251 | Hydraulic jar lock An internal, positive engagement lock that locks a tool, such as a hydraulic drilling jar, in the fully open position when the tool is racked back and when tripping in and out of the hole close to the surface. The lock mechanism is spring biased into a locked positi... | 06/27/2006 |
| 7064676 | Downhole data transmission system A system for transmitting data through a string of downhole components. In one aspect, the system includes first and second magnetically conductive, electrically insulating elements at both ends of the component. Each element includes a first U-shaped trough with a ... | 06/20/2006 |
| 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 |
| 6981547 | Wire lock expandable connection The present invention generally relates to a connector arrangement for connecting a first tubular to a second tubular. In particular, the present invention relates to methods and apparatus for connecting the tubulars in such a way that the connection is prevented fr... | 01/03/2006 |
| 6935430 | Method and apparatus for expanding a welded connection 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 |
| 6923256 | Disconnect device A disconnect device for use in oil well and gas well servicing operations. The device comprising a mandrel having one or more locking formations, and a hollow, female member in which the mandrel is releasably securable. The female member includes one or more lugs th... | 08/02/2005 |
| 6915865 | Locking swivel apparatus with a supplemental internal locking mechanism A locking swivel apparatus is provided. The locking swivel includes an upper body portion having a counter bore about a cylindrical axis, a mandrel receivable in the counter bore, and a lower cap member threadably engaged with the upper body portion. The apparatus f... | 07/12/2005 |
| 6899174 | Floating instrument insert for a tool An instrument insert for a tool of the type comprising an inner member extending within an outer member, the inner and outer members being capable of relative longitudinal movement. The insert includes a first insert portion comprising a first instrument component o... | 05/31/2005 |
| 6880637 | Full bore automatic gun release module A well completion procedure and apparatus comprises a first assembly that includes production tubing combined with a production packer and an internal bore latching profile. A second assembly comprises an explosive perforating gun secured to a latching mechanism. Th... | 04/19/2005 |
| 6808023 | Disconnect check valve mechanism for coiled tubing A tubing conveyed disconnect check valve mechanism having releasable connection with a payload tool and being selectively actuated downhole for disconnecting from the payload tool for retrieval by the tubing string, with the check valve enabled for direct circulatin... | 10/26/2004 |
| 6772835 | Apparatus and method for disconnecting a tail pipe and maintaining fluid inside a workstring An embodiment of a downhole tool for use with a workstring in a wellbore includes a first section, a second section, and a coupling mechanism adapted such that in a first configuration the coupling mechanism couples the first section to the second section. In a seco... | 08/10/2004 |
| 6712146 | Downhole assembly releasable connection A disconnect assembly connecting two portions of a downhole assembly having a downhole apparatus attached to a coiled tubing string. The disconnect assembly includes a first housing connected to one portion of the downhole assembly and a second housing connected to ... | 03/30/2004 |
| 6626244 | Deep-set subsurface safety valve assembly An apparatus and method for use in a cased well having a production tubing assembly installed in the well and terminating with a connection mechanism at a subterranean location. The apparatus and method utilizes a spoolable tubular assembly for installati... | 09/30/2003 |
| 6591912 | Full bore automatic gun release module A perforation gun is secured to the inside bore of a well completion tube by a releasable connection module. The connection module mechanism includes radially expanding anchor dogs that are retained at an expanded position by a latching mechanism that may... | 07/15/2003 |
| 6527048 | Hydraulically actuated downhole coupler system, especially for combination washover/fishing tool assemblies A coupler system for downhole wellbore service tools comprises an elongated main body having a longitudinal bore, a plurality of release blocks disposed in slots in the main body wall, and an exterior spline about its circumference below the release block... | 03/04/2003 |
| 6516878 | Downhole tension swivel sub A downhole equipment for use in the gas and oil drilling industry includes a first elongate member arranged in telescopic relation with a second elongate member, the elongate members being moveable relative to one another between a retracted position in w... | 02/11/2003 |
