Did You Know...
...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!
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| Number | Title | Issue Date |
| 7984772 | Downhole centrifugal drilling fluid separator In one aspect of the invention, a downhole centrifugal drilling fluid separator has a bore within a tubular body comprising a central axis. The bore is formed to receive drilling fluid comprising particulate matter. At least one fin rigidly fixed within the bore and... | 07/26/2011 |
| 7980332 | Downhole centrifugal drilling fluid separator In one aspect of the invention, a downhole centrifugal drilling fluid separator has a bore within a tubular body comprising a central axis. The bore is formed to receive drilling fluid comprising particulate matter. At least one fin rigidly fixed within the bore and... | 07/19/2011 |
| 7958952 | Pulse rate of penetration enhancement device and method The system and device described relates to flow pulsing for use in down-hole drilling rate of penetration (ROP) enhancement and measurement while drilling (MWD) using a pulse drilling device (PDD) with a fast acting valve in conjunction with a pilot valve to produce... | 06/14/2011 |
| 7836977 | Method of drilling a well at or under balance using a electrical submersible pump A drilling system for use in a well bore consists of a drill string, an electrically powerable pump (8), a connector (16) for supporting the pump (8) including a through bore (32) through which fluid can flow, and a power cable (15... | 11/23/2010 |
| 7424922 | Rotary valve for a jack hammer In one aspect of the present invention a tool string comprises a jack element substantially coaxial with an axis of rotation. The jack element is housed within a bore of the tool string and has a distal end extending beyond a working face of the tool string. A rotar... | 09/16/2008 |
| 7387176 | Down hole air diverter A down hole air diverter having a first opening in communication with the central passageway of a drillstring; a second opening in communication with the well bore annulus; and a means to control the flow of pneumatic fluid between the first opening and the second o... | 06/17/2008 |
| 7383881 | Stabiliser, jetting and circulating tool A downhole tool (10) for use in oil and/or gas well bores. The tool has a tubular body (20) and a sleeve (22) including stabilizer blades (30). The tool is ball (76), activated, weight activated or hydraulically activated to select... | 06/10/2008 |
| 7353887 | Control systems and methods for active controlled bottomhole pressure systems An active differential pressure device (APD device) in fluid communication with a returning fluid creates a differential pressure across the device, which controls pressure below the APD Device. In embodiments, a control unit controls the APD Device to provide a sel... | 04/08/2008 |
| 7350598 | Downhole tool A downhole tool for use within a well comprising a body having an external diameter smaller than the diameter of the well so as to form an annular gap between the body and the interior surface of the well. A first downhole fluid passage having an upper inlet and a l... | 04/01/2008 |
| 7311148 | Methods and apparatus for wellbore construction and completion The present invention relates methods and apparatus for lining a wellbore. In one aspect, a drilling assembly having an earth removal member and a wellbore lining conduit is manipulated to advance into the earth. The drilling assembly includes a first fluid flow pat... | 12/25/2007 |
| 7296637 | Oil drilling tool The present invention comprises a drilling tool assembly for drilling oil comprising a bit release subassembly, a test sleeve that is removable to open and close flow ports, and a profile nipple. ... | 11/20/2007 |
| 7281592 | Injecting a fluid into a borehole ahead of the bit A method and system for introducing a fluid into a borehole, in which there is arranged a tubular drill string including a drill bit, wherein the drill bit is provided with a passageway between the interior of the drill string and the borehole, and with a removable ... | 10/16/2007 |
| 7243743 | Drilling assembly and method for drilling a barehole into geological formations A drilling assembly for drilling a borehole into geological formations. The assembly comprises a drilling shaft and a pump device, both placable in the borehole. The drilling shaft comprises a drilling head, and the pump device comprises a sealing device for sealing... | 07/17/2007 |
| 7204327 | Reverse circulation directional and horizontal drilling using concentric drill string Method and apparatus for drilling a directional or horizontal wellbore in a hydrocarbon formation using concentric drill string having an inner pipe and an outer pipe defining an annulus there between. A bottomhole assembly comprising a directional drilling means su... | 04/17/2007 |
| 7174975 | Control systems and methods for active controlled bottomhole pressure systems Methods and control systems are provided for a wellbore drilling system having an active differential pressure device (APD device) in fluid communication with a returning fluid. The APD Device creates a differential pressure across the device, which reduces the pres... | 02/13/2007 |
| 7165634 | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 01/23/2007 |
| 7147068 | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 12/12/2006 |
| 7134512 | Method of downhole drilling and apparatus therefor A downhole drilling apparatus suspended by tubing includes a drill bit driven by an electric motor powered by a cable means. The motor is mounted upon a hollow shaft which allows fluid to pass through, so that a fluid circuit along the tube and back along the annulu... | 11/14/2006 |
| 7114581 | Active controlled bottomhole pressure system & method A wellbore drilling system has an umbilical that carries a drill bit in a wellbore. Drilling fluid pumped into the umbilical discharges at the drill bit bottom and returns through an annulus between the umbilical and the wellbore carrying entrained drill cuttings. A... | 10/03/2006 |
| 7108080 | Method and apparatus for drilling a borehole with a borehole liner A method for drilling a borehole includes; providing a drill string of drill pipe including a center bore, a distal end, a bit assembly at the distal end; hanging a liner from the drill string, thereby forming an annular space between the drill string and the liner ... | 09/19/2006 |
| 7090039 | Assembly for drilling low pressure formation The invention relates to a drilling assembly for drilling a borehole into geological formations which assembly comprises: a drilling shaft placable in the borehole, which shaft has a drilling head; and a pump devic... | 08/15/2006 |
| 7090023 | Apparatus and methods for drilling with casing The present invention provides an apparatus and methods to reduce ECD and pressure associated therewith while drilling with casing. In one aspect, the invention provides an energy transfer assembly locatable at a predetermined location in a casing string. The assemb... | 08/15/2006 |
| 7048050 | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 05/23/2006 |
| 7044229 | Downhole valve device A downhole valve device (1) in a drill string (14) in a petroleum well (2) and method for maintaining optimal annular fluid velocity and wellbore pressure. The device comprises a valve housing (20) connected between adjacent segments (... | 05/16/2006 |
| 7036610 | Apparatus and method for completing oil and gas wells A method of drilling and completing a wellbore in a geological formation to produce hydrocarbons from a well comprising at least the following four steps: drilling the well with a retrievable drill bit attached to a casing; removing the retrievable drill bit from th... | 05/02/2006 |
| 7025155 | Rock bit with channel structure for retaining cutter segments A roller cone body defines a circumferential channel or race into which a plurality of cutter or wear segments are mounted. The wear segments may be of any appropriate contour or shape, such as for example chisel, spherical, or even flat face and are preferably made... | 04/11/2006 |
| 6966393 | Drill drive steel A drive steel member for driving engagement with a rotary drilling machine, including a chuck adapter having main body and chuck seating means and being constructed and arranged in fixed, sealed relation on one end of the drive steel member. ... | 11/22/2005 |
| 6918452 | Drill string shutoff valve A valve assembly connects into a drill string for opening and closing the inner passage within the drill string. The valve member moves between the open and closed positions in response to axial movement of the drill string. The valve member has an upper portion and... | 07/19/2005 |
| 6896075 | Apparatus and methods for drilling with casing The present invention provides an apparatus and methods to reduce ECD and pressure associated therewith while drilling with casing. In one aspect, the invention provides an energy transfer assembly locatable at a predetermined location in a casing string. The assemb... | 05/24/2005 |
| 6877571 | Down hole drilling assembly with independent jet pump A Down Hole Drilling Assembly (DHDA) that induces artificial lift to remove the drilling fluid from a well bore using a jet pump attached to a casing string. The DHDA includes a drill string that passes through the jet pump assembly. The power fluid is separated fro... | 04/12/2005 |
| 6830107 | Fluid flow switching device A fluid flow switching device for a drill string comprises a tubular member having a port (4). A sleeve member is slidable within the tubular member between a first position in which a port (3) thereof is in alignment with the port (4) and a sec... | 12/14/2004 |
| 6769498 | Method and apparatus for inducing under balanced drilling conditions using an injection tool attached to a concentric string of casing A method and apparatus for under balanced drilling comprising a production casing extending vertically from the ground to the area where the drilling is taking place, a concentric casing mounted within the production casing and forming therewith an outer annulus, a ... | 08/03/2004 |
| 6550548 | Rotary steering tool system for directional drilling A rotary steering apparatus including a drill string, a drill bit, a main body connected at one end to the drill string and at another end to the drill bit, a sleeve extending around the main body such that the main body is freely rotatable within the sle... | 04/22/2003 |
| 6520271 | Fluid powered rotary drilling assembly A drilling fluid powered rotary drilling motor is mounted on the downhole end of a non-rotating fluid conducting drill string has a drill bit on its distal end and a plurality of fluid engaging, rotating elements coupled to at least one speed reducing pla... | 02/18/2003 |
| 6497295 | Torque limiting tool A down-hole tool comprises a generally tubular body for connection in a drill string, the body typically having an upper tubular member and a lower tubular member interconnected to be axially secured and relatively rotatable, and a frangible element secur... | 12/24/2002 |
| 6457541 | Surface controlled by-pass valve The diverter valve is carried in a housing that serves as a length of drill string. A selector valve is actuated by selective mud flow control signals from the surface and can close to build internal pressure to move a poppet to open a by-pass channel. Po... | 10/01/2002 |
| 6367566 | Down hole, hydrodynamic well control, blowout prevention The system and method of the present invention permits control of down hole fluid pressures during under balanced drilling, tripping of the drill string, and well completion to substantially avoid "killing" of the well and thereby damaging the producing f... | 04/09/2002 |
| 6283230 | Method and apparatus for lateral well drilling utilizing a rotating nozzle Method and apparatus for drilling into earth strata surrounding a well casing utilizing a rotating fluid discharge nozzle and reduction of static head pressure in the well casing in conjunction with the drilling operation.... | 09/04/2001 |
| 6263981 | Deepwater drill string shut-off valve system and method for controlling mud circulation A method is disclosed for controlling the mud circulation system for deepwater marine drilling operations in which a drill string is run from surface facilities, through a blowout preventor and into a borehole. Mud is injected into the drill string, up a ... | 07/24/2001 |
| 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 |
