Quotables
"What, sir, would you make a ship sail against the wind and currents by lighting a bonfire under her deck? I pray you, excuse me, I have not the time to listen to such nonsense."
Napoleon Bonaparte ; When told of the Robert Fulton steamboat
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 |
| 7954567 | Adjustable winged centering tool for use in pipes with varying diameter An adjustable centering tool for use in pipes of varying inner diameter. The centering tool being provided with a number of identical and steplessly adjustable, radially protruding wings having guiding lugs and chamfered end faces. The wings, having been set, are re... | 06/07/2011 |
| 7600587 | Wear resistant sleeve for sub assembly An apparatus for protecting a sub assembly inside a borehole of a well, with a sleeve having a sleeve outer diameter larger than the body outer diameter; a plurality of offset indentations formed on the outer side of the sleeve formed in rows of 4 to 8 offset indent... | 10/13/2009 |
| 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 |
| 7347287 | Hydraulic timing device A jar for use in a downhole environment comprises an hydraulic timing device which allows pressure to be controllably increased to a desired level and, on firing, a near-instantaneous release of that pressure, and which allows for selective bi-directional firing of ... | 03/25/2008 |
| 7308955 | Stabilizer arrangement A stabilizer comprises a body having first and second ends, each of which is formed with a respective connector means, the body having an outer wall upon which is formed a plurality of the upstanding blades radially outer surfaces of which define gauge pads, flow ch... | 12/18/2007 |
| 7252163 | Downhole under-reamer tool A downhole tool comprises a body having slots communicating the outside of the body with the body through-bore. A sleeve actuator and mandrel are selectively axially slidable. The actuator has flanges extending into the slots. The flanges have ribs on their sides th... | 08/07/2007 |
| 7219727 | Wear resistant tubular connection A wear resistant casing connection including a wear resistant portion on its exterior surface is taught. A casing connection having a controlled bend angle is also taught. ... | 05/22/2007 |
| 7188682 | Multi-stage diffuser nozzle A multi-stage diffuser nozzle for use as a drill bit nozzle jet includes a flow restriction portion upstream of a fluidic distributor portion, and also preferably includes a transition region between these two. The flow restrictor communicates with the interior flui... | 03/13/2007 |
| 7188689 | Variable gauge drilling apparatus and method of assembly therefor A variable gauge drilling apparatus and a method for assembling a variable gauge drilling apparatus for insertion in a subject borehole. The variable gauge drilling apparatus includes: an apparatus housing having a housing size which is suitable for insertion in a s... | 03/13/2007 |
| 7168507 | Recalibration of downhole sensors In downhole drilling tools, a first set of inexpensive and/or relatively small sensors that typically have lower accuracy and higher drift than conventional downhole sensors are located in the drill string adjacent to the bit. A second set of highly accurate sensors... | 01/30/2007 |
| 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 |
| 7048064 | Multi-unit centralizer A multi-unit centralizer for centralizing or otherwise positioning a tubing string in a well bore. The centralizer has a centralizer hub including multiple hub subunits for removably engaging each other and at least one spacer lug for removably engaging each of the ... | 05/23/2006 |
| 7036611 | Expandable reamer apparatus for enlarging boreholes while drilling and methods of use An expandable reamer apparatus and methods for reaming a borehole, wherein a laterally movable blade carried by a tubular body may be selectively positioned at an inward position and an expanded position. The laterally movable blade, held inwardly by blade-biasing e... | 05/02/2006 |
| 6957708 | Electrical imaging in conductive and non-conductive mud The invention is a method and apparatus for determining an electrical property a formation surrounding a borehole with a measuring-while-drilling device. The apparatus an antenna configuration disposed along the outer face of an extendable stabilizer joined to a rot... | 10/25/2005 |
| 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 |
| 6851489 | Method and apparatus for drilling wells A well borehole is prevented from deviating from its intended vertical path as it is being drilled by use of a sub assembly which is eccentrically weighted with respect to its axis of rotation. Such a sub assembly can comprise a straight tubular member weight reliev... | 02/08/2005 |
| 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 |
| 6776247 | Stabilizer tool block wear pad assembly The present invention is for a drill string stabiliser tool (18) used in borehole drilling. The tool includes a symmetrical body (20) with a plurality of external recesses (22). The recesses (22) have internal opposite surfaces (23... | 08/17/2004 |
| 6343648 | Down-hole tool with detachable cleaning pads A down-hole tool for use in an oil or gas well is provided with detachable components that are held to a body or tool housing by longitudinal mechanical fasteners disposed in a generally radial orientation. The mechanical fasteners allow for the component... | 02/05/2002 |
| 6223840 | Cutting bed impeller A cutting bed impeller comprises a body portion and a plurality of paddles projecting outwardly from the body portion, at least one of the paddles comprising a radially outer face extending between a leading edge and a trailing edge in a normal direction ... | 05/01/2001 |
| 6102142 | Drilling tool with shock absorbers A drilling tool including a drilling head equipped with cutting edges and fitted with several shock-absorption elements, of which at least one part is made of an elastomer material. Each shock-absorption element having a block incorporating one portion in... | 08/15/2000 |
| 6098727 | Electrically insulating gap subassembly for downhole electromagnetic transmission An electrically insulating gap subassembly for inclusion in a pipe string (30) comprising a pair of tubular members (90, 98) having an electrically insulating isolation subassembly (94) threadably disposed therebetween is disclosed. The electrically insul... | 08/08/2000 |
| 5937957 | Cutting bed impeller A cutting bed impeller (10) comprises a body portion and a plurality of paddles (24) projecting from the body portion, one or more of the paddles (24) having a recess (18) on its leading face in the direction of rotation of the impeller (10). The radially... | 08/17/1999 |
| 5868212 | Stabiliser tool A stabilizer tool (15) for a drill string (10) has a circular body (16) with recesses (17) containing projecting pad assemblies (18) arranged in a spaced helical configuration, each pad assembly (18) having at least one projecting wear block (20) maintain... | 02/09/1999 |
| 5803194 | Wear protector for a drilling tool A wear assembly for attachment to a protective sleeve for a drill bit sub wherein the wear assembly includes an elongate wear bar which has an interior surface for attachment to the protective sleeve. The wear bar also has an exterior surface. The wear ba... | 09/08/1998 |
| 5788000 | Stabilizer-reamer for drilling an oil well The subject of the present invention is a stabilizer-reamer for drilling an oil well. The invention provides an improvement to drillpipe string stabilizers used when drilling an oil well. The purpose of the stabilizer, which forms the subject of the invention,... | 08/04/1998 |
| 5474143 | Drill bit reamer stabilizer A drill bit reamer stabilizer has an upper and lower stabilizer on a bottom hole assembly with the lower stabilizer as close as possible to the drill bit. This arrangement reduces deviations when drilling a straight hole. Furthermore there is a reamer por... | 12/12/1995 |
| 5447207 | Downhole tool A stabilizer-type downhole tool comprises an elongate main body. At least one elongate blade lying generally longitudinally along the exterior of the main body projects radially outwardly therefrom. Attachment means cooperative between the main body and t... | 09/05/1995 |
| 5343964 | Petroleum, gas or geothermal driling apparatus The invention relates to a petroleum, gas or geothermal drilling apparatus comprising a central tool and a coaxial bit, wherein the central tool is driven by the rotor of a bottom engine which is fed by the drilling mud and wherein the bit is driven from ... | 09/06/1994 |
| 5339914 | Adjustable drilling mechanism A down hole drilling tool activating mechanism is provided which will adjustably activate tool elements such as stabilizer pads by a mandrel which will move vertically against a bias spring and has inclined surfaces to bear on the inside of the adjustable... | 08/23/1994 |
| 5224558 | Down hole drilling tool control mechanism A down hole drilling tool activating mechanism comprising a drill string sub connectable between adjacent lengths of drill string pipe which provides a hollow housing with a central bore, a mandrel having a central bore positioned within the bore of said ... | 07/06/1993 |
| 5058689 | Wear protective means for a drilling tool A drill bit sub, which has a drill bit with three equally angularly spaced cutters releasably threaded into its bottom surface, has its lower portion reduced in diameter. A protective sleeve, which is a hollow cylindrical metal tube, is releasably attache... | 10/22/1991 |
| 5042600 | Drill pipe with helical ridge for drilling highly angulated wells The drilling of highly angulated wellbores (with a rotary rig having a drill string terminated with a bit wherein drilling fluid is employed) is improved by employing in the highly angulated drill string a length of drill pipe which has a helical ridge di... | 08/27/1991 |
| 5012863 | Pipe milling tool blade and method of dressing same A blade (8) for a pipe milling tool having a body (1) and a longitudinal axis (100) has a plurality of slots (12) extending both in a generally radial direction and in an intended direction of rotation of the milling tool about the longitudinal axis. Loca... | 05/07/1991 |
| 4995466 | Method and device for stabilizing the path of a drilling tool An apparatus, and method of using the apparatus, for use in a drill string inserted into a borehole to stabilize the path of travel of a drilling tool. The apparatus is attached to the lower end of a drill string, and comprises a tubular section having a ... | 02/26/1991 |
| 4958692 | Downhole stabilizers There is described a downhole stabilizer having a number of spiral fin-like blades. Each blade is provided with a pocket each of which carries an omni-directional rolling element bearing in the form of a ball which is engaged against the wall of the drill... | 09/25/1990 |
| 4877092 | Near bit offset stabilizer A near bit offset stabilizer for use with a bent sub or bent motor housing is presented wherein a mechanism is provided to correctly orient and lock the stabilizer in a desired position in alignment with the bend angle in the bent sub or bent motor housin... | 10/31/1989 |
| 4862974 | Downhole drilling assembly, apparatus and method utilizing drilling motor and stabilizer A downhole drilling apparatus for use with an undergauge drill bit comprises a downhole drilling motor which includes a housing and means for rotating the drill bit relative to the housing about an axis of rotation. The apparatus also comprises stabilizer... | 09/05/1989 |
| 4854403 | Stabilizer for deep well drilling tools A stabilizer for deep well drilling tools is disclosed which includes a tubular outer casing having a plurality of slit openings distributed around its periphery with a tubular adjusting mandrel supported in the casing for relative axial movement therewit... | 08/08/1989 |
| 4854399 | Tubular element for use in a rotary drilling assembly A tubular drill string element, such as a stabilizer or tool joint, comprises an outer surface having in circumferential direction a ratchetted profile. The ratchetted profile is preferably oriented such that provides low resistance against right hand rot... | 08/08/1989 |
