Quotables
"Without question, the greatest invention in the history of mankind is beer. Oh, I grant you that the wheel was also a fine invention, but the wheel does not go nearly as well with pizza."
Dave Barry
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8011429 | Transport assembly A transport assembly configured to be attached to downhole apparatus has a support assembly configured to be attached to the downhole apparatus and a ground engaging assembly, which may be a roller wheel configured to contact with and move in relation to a surface o... | 09/06/2011 |
| 7866384 | Downhole device The invention relates to a downhole device for incorporation into a downhole string and movement in a wellbore. The device comprises a body member, at least one roller arranged on the device to engage the inner surface of the wellbore and means to orient the device ... | 01/11/2011 |
| 7854259 | PC rod guide with rotor ridges A rod guide is provided for use in a rotating rod string (12) for powering a progressive cavity pump (14) for pumping downhole fluids through tubing (16) to the surface. The rod guide includes a rotor sleeve (20) secured to the rod string... | 12/21/2010 |
| 7493948 | Wellbore consolidating tool for rotary drilling applications The present invention generally relates to an apparatus and methods for improving the stability of a wellbore during drilling operations using a rotary drill string. More specifically, embodiments of the present invention provide systems and methods for enhancing th... | 02/24/2009 |
| 7434620 | Cavity positioning tool and method In accordance with the teachings of the present invention, a method is provided for preventing formation of sludge in a subsurface cavity having particulate laden fluid disposed therein. The method includes positioning a downhole device having a fluid agitator into ... | 10/14/2008 |
| 7395881 | Roller subs A roller sub system for reducing friction between a tool string and a wall in a well bore for use in the oil and gas industry. The apparatus has a roller body and wheel sub system, which is configured to have removably mounted wheels of variable diameters. A plurali... | 07/08/2008 |
| 7279052 | Method for hydrate plug removal A method for removal of deposits such as hydrate plugs from a pipeline is provided including inserting a thruster pig connected to a return flow line into the pipeline The pig is then advanced forward into the pipeline by pumping a thrusting fluid into an annulus be... | 10/09/2007 |
| 7255165 | Field-installable rod guide A field-installable rod guide for a rod moveable within an oilfield tubular having an interior tubular surface for driving a downhole pump to pump liquids to the surface through the oilfield tubular. The rod guide comprises a body including interfitting body members... | 08/14/2007 |
| 7256351 | Jacket construction having increased flame resistance A communications cable having increased fire resistance and reduced attenuation and crosstalk includes a core having at least one insulated electrical conductor, and a jacket having an inner surface and a plurality of ribs projecting radially inward from the inner s... | 08/14/2007 |
| 7213644 | Cavity positioning tool and method In accordance with the teachings of the present invention, a method is provided for preventing formation of sludge in a subsurface cavity having particulate laden fluid disposed therein. The method includes positioning a downhole device having a fluid agitator into ... | 05/08/2007 |
| 7188671 | System, method, and apparatus for survey tool having roller knuckle joints for use in highly deviated horizontal wells A highly flexible, wireline survey tool has roller knuckle joints that enable the survey tool string to penetrate and survey horizontal wells having inclinations of about 80° and more from vertical. The survey tool string includes a nose, roller stems, roller knuck... | 03/13/2007 |
| 7178611 | System and method for directional drilling utilizing clutch assembly According to one embodiment of the invention, a system for directional drilling within a wellbore includes a drill string having an upper portion, a lower portion, a bent motor coupled to the lower portion, and a drill bit coupled to bent motor, and a clutch assembl... | 02/20/2007 |
| 7159668 | Centralizer A centralizer 10 for mounting on a tubular member such as a section of casing, together with one or more stops 42, 48 for retaining the centralizer thereon. The stops 42, 48 are provided with profiles for engaging the centralizer to restrict rot... | 01/09/2007 |
| 7156171 | Dual diameter and rotating centralizer/sub A centralizer for maintaining stand-off and/or centralizing a tubular member inside a larger diameter tubular member, for instance, in a wellbore. The centralizer is provided with bow springs that compress to a minimal diameter around the outer diameter of the sub t... | 01/02/2007 |
| 7144243 | Tubing expansion A tubing expansion device (20) is adapted to be advanced axially, without rotation, through tubing (10) to be expanded. The device (20) comprises a body (22) and a plurality of expansion members (30,32,34) mounted on the body (2... | 12/05/2006 |
| 7143848 | Downhole tool An expandable centralizer is disclosed having a body having a first portion of circular cross-section and a second portion of polyhedral cross-section. Centralizing members are arranged on the faces of the second portion which, in a first position, limit the diamete... | 12/05/2006 |
| 7140432 | Dual diameter and rotating centralizer/sub and method A dual diameter centralizing sub for maintaining stand-off and/or centralizing a tubular member inside a larger diameter tubular member, for instance, in a wellbore. The centralizer is provided with bow springs that compress into grooves between radially outwardly-e... | 11/28/2006 |
| 6830103 | Roller subs The present invention provides a roller sub for use downhole in oil or gas wells as part of a toolstring or drill string to reduce friction between the string and wellbore. The roller sub is a modular assembly of parts which assemble together to trap the roller whee... | 12/14/2004 |
| 6761233 | Apparatus for propulsion in elongated cavities An apparatus for propulsion inside an oblong cavity, such as pipes or the like, is disclosed. The apparatus is characterized by comprising a central rotating part comprising an inclined wheel construction arranged to thrust towards the inner wall of the cavity, in t... | 07/13/2004 |
| 6684965 | Method and apparatus for operations in underground subsea oil and gas wells A method and apparatus for advancing a rotating motorized downhole tool for operations in oil/gas wells. The apparatus is adapted for drilling and milling away of casing sections in the wells, as preparation for plugging the same. The apparatus includes a... | 02/03/2004 |
| 6679325 | Minimum clearance bow-spring centralizer A centralizer apparatus for centralizing tubular casing in a borehole having two stop collars for securing to the casing in a spaced apart relationship and two moving collars, one slidably and rotatably coupled to each stop collar, a plurality of bow spri... | 01/20/2004 |
| 6655462 | Magnetic well cleaning apparatus Apparatus which can collect loose debris, particularly ferrous debris, has a body 2 with upper 3 and lower 4 stabiliser sleeve. The body 2 has a one or more integral magnets or magnetic areas 5. In one embodiment the magnets are located in a first and sec... | 12/02/2003 |
| 6622803 | Stabilizer for use in a drill string A stabilizer especially adapted for use with an drill string having an eccentric drilling element, such as a bi-center bit. The stabilizer has a pair of circumferentially displaced blades that lie in a common circumferential plane and extend from a rotata... | 09/23/2003 |
| 6585043 | Friction reducing tool A centralizer having a first group of rollers (5) for reducing friction between the centralizer and an oil field tubular (7) and a second group of rollers (4) for reducing friction between the centralizer and the wall of a well. The axles of the first gro... | 07/01/2003 |
| 6533034 | Centralized stop collar for floating centralizer A centralizer for engagement with a pipe exterior surface to be positioned downhole in a wellbore. The centralizer includes a collar which can be fastened with set screws or other connector to the pipe exterior surface. A body is engaged with said collar ... | 03/18/2003 |
| 6457519 | Expandable centralizer A centralizer for laterally positioning an instrument in an opening larger in diameter than the diameter of an opening through which the centralizer can freely pass. The centralizer includes spring blades affixed at one end to an outer surface of the inst... | 10/01/2002 |
| 6453999 | Centralizer A centralizer which comprises a pair of annular bands (2, 3) which are spaced apart by a plurality of hollow members (4 to 9) characterized in that the hollow members (4 to 9) are each provided with at least one window (24, 25, 26) having a roller (12, 13... | 09/24/2002 |
| 6435275 | Casing centralizer A casing centraliser and assembly comprising a tubular and a centraliser, the centraliser comprising a plastics material.... | 08/20/2002 |
| 6412556 | Cavity positioning tool and method A cavity positioning tool is provided that includes a head piece adapted to receive a downhole string having a longitudinal axis. A plurality of blunt arms are coupled to the head piece. The blunt arms are operable to be radially extended outward from a f... | 07/02/2002 |
| 6382333 | Friction reducing tool for oilfield drilling applications A friction reducing tool for drilling applications having a plurality of rollers for about the periphery of the tool (3). The rollers (4) have extensions (7) which locate within cavities (8) to prevent the rollers from passing from cavity (10) to the exte... | 05/07/2002 |
| 6260617 | Skate apparatus for injecting tubing down pipelines A method and apparatus which inserts and withdraws tubing from pipes without bending or kinking the tubing. The method and apparatus may be employed to insert and withdraw tubing to depths greater than ever possible before. The method involves using skate... | 07/17/2001 |
| 6250394 | Apparatus for assisting the advancement of a work string and method An apparatus for assisting the advancement of a work string. In the preferred embodiment, the work string is concentrically disposed within a highly deviated tubular member. The apparatus comprises a cylindrical member having a first half clamp and a seco... | 06/26/2001 |
| 5908072 | Non-metallic centralizer for casing A non-metallic centralizer for casing having a tubular, plastic sleeve adapted to fit closely about a joint of casing, said sleeve having a plurality of blades extending substantially longitudinally along an outer surface of said sleeve. The non-metallic ... | 06/01/1999 |
| 5901798 | Drill pipe tubing and casing protectors A drill pipe protector comprises an annular body (820) adapted to surround a drill pipe (824) in a borehole to protect the drill pipe and borehole (or borehole casing) against damage caused by contact between the two, such that the drill pipe may rotate f... | 05/11/1999 |
| 5810100 | Non-rotating stabilizer and centralizer for well drilling operations A non-rotating stabilizer tool is provided for connection within a drilling string for stabilization and centralization of the drill string within a well bore being drilled by a rotary drill bit. The tool incorporates an elongate stabilizer and centralize... | 09/22/1998 |
| 5727627 | Well rod centralizer/centralizer stop interface with wear reducing surface Improved wear interface surfaces on well rod stabilizers and stabilizer stops. Well apparatus includes a rotary tool in a string of tubing extending into a well hole in the earth and a rod extending to the ground surface through such tubing which is drivi... | 03/17/1998 |
| 5692562 | Well rod, centralizer and centralizer stop interfaces with wear reducing surface Improved wear interface surfaces on well rod centralizers and centralizer stops. Well apparatus includes a rotary tool in a string of tubing extending into a well hole in the earth and a rod extending to the ground surface through such tubing which is dri... | 12/02/1997 |
| 5649603 | Downhole tools having circumferentially spaced rolling elements A downhole tool for providing rotary support of a downhole assembly in which the tool is incorporated, the tool also converting rotary contact with the wellbore to a longitudinal force tending to propel the assembly along the wellbore. The tool resembles ... | 07/22/1997 |
| 5358040 | Method and apparatus for running a mechanical roller arm centralizer through restricted well pipe Method and apparatus for running a mechanical roller arm centralizer through restricted well pipe including roller arms with staggered longitudinal height and limitations upon extension and compression of the arms.... | 10/25/1994 |
| 5334268 | Method of producing high strength sucker rod coupling A sucker rod coupling 10 having a high ultimate tensile strength, resistance to corrosion, and resistance to surface cracking arising out of a method of making the sucker rod coupling 10, which employs a five-step process of forming a coupling 10. First, ... | 08/02/1994 |
