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| Number | Title | Issue Date |
| 8113302 | Drilling tool A drilling tool that has a flexible shaft so as to be able to make short radius curves while still being able to transmit torque and axial loads. The drilling tool includes a drill shaft for transmitting axial load, comprising a series of coaxial ring members connec... | 02/14/2012 |
| 8061450 | Percussion drilling assembly having erosion retarding casing A percussion drilling assembly for drilling through earthen formations and forming a borehole. In some embodiments, the drilling assembly includes a retainer sleeve having an upper end with an outer diameter and a tubular casing engaging the retainer sleeve. The tub... | 11/22/2011 |
| 8051927 | Percussive drill bit for rock drilling and method for the manufacture of such a drill bit A drill bit for percussive rock drilling of the type that comprises a front head and a tubular skirt, which extends rearward from the head to a rear, ring-shaped end and includes an internal thread for the transfer of combined impact and rotary motions to the drill ... | 11/08/2011 |
| 7980331 | Accessible downhole power assembly A drill string component includes a downhole power assembly and a center mandrel with a through-bore adapted to accommodate a flow of drilling fluid. The downhole power assembly includes a tubular battery cage disposed around the center mandrel. At least one battery... | 07/19/2011 |
| 7954565 | Thread retention for an earth boring device The invention relates to an earth boring device including a housing which has at least one portion with an inner thread, and a threaded element which has a corresponding outer thread, wherein the threaded element is slotted and has a receptacle for a securing elemen... | 06/07/2011 |
| 7942216 | Drill rod, drill bit, and drilling tool A drill rod has a fitting portion protruding toward the distal end of the drill rod. The drill rod fitting portion further encompasses a parallel male thread portion in which a minimum distance from a first axial line in a cross-section perpendicular to the first ax... | 05/17/2011 |
| 7934570 | Data and/or PowerSwivel In one aspect of the invention, a swivel for use in a drilling operation comprises a body with a central bore adapted for threaded connection to a tool string component. At least one electrically conductive medium is rotationally supported within the bore and adapte... | 05/03/2011 |
| 7900719 | Bi-steel percussive drill rod A drill rod includes a first end section, a mid-section, wherein the first end section and the mid-section are connected and wherein the first end section is manufactured using different steel than is used for the mid-section. Such a configuration can reduce the cos... | 03/08/2011 |
| 7900718 | Earth-boring tools having threads for affixing a body and shank together and methods of manufacture and use of same Earth-boring tools comprise a shank comprising a distal connector including a set of threads thereon and a bit body comprising a shank connector, also comprising at least one set of threads thereon. The set of threads on the distal connector and the at least one set... | 03/08/2011 |
| 7891442 | Flexible drill string member A drilling tool that has a flexible shaft so as to be able to make short radius curves while still being able to transmit torque and axial loads. The drilling tool includes a drill shaft for transmitting axial load, comprising a series of coaxial ring members connec... | 02/22/2011 |
| 7857078 | Cutting tools and methods of making the same A cutting tool includes a mandrel; a matrix affixed to the mandrel; and cutting material disposed within the matrix and method of making the same. ... | 12/28/2010 |
| 7779934 | Flexible/rigid drilling assembly A flexible/rigid drilling assembly that can be flexible enough to bend around and into a curved hole form a vertical well to the horizontal with a short horizontal hole extension. When the flexible/rigid drilling assembly is placed in the short horizontal hole exten... | 08/24/2010 |
| 7571779 | Drill rod and method of manufacture thereof A drill rod for percussive rock drilling includes a first rod part and an additional second rod part. The first rod part includes first and second ends, an inner duct, and an external thread disposed adjacent the first end, wherein the external thread is at least pa... | 08/11/2009 |
| 7565936 | Combined telemetry system and method Telemetry systems and methods are disclosed for real time communication of information between multiple positions in a wellbore. ... | 07/28/2009 |
| 7543659 | Modular connector and method A connector connects auxiliary flow lines and electrical lines that extend through and terminate at or near opposing ends of two respective components of a downhole tool string. The connector comprises a body assembly for fluidly-connecting the auxiliary flow lines ... | 06/09/2009 |
| 7472763 | 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. ... | 01/06/2009 |
| 7431094 | Method for utilizing downhole safety joint A method of operating 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... | 10/07/2008 |
| 7429154 | Insertion end for a rotary and a percussive tool An insertion end of a tool is driven along an axis at least partially rotary or percussively, which extends along the axis within a maximum guide diameter. At least one longitudinally closed locking groove and rotary driving groove is longitudinally closed at a long... | 09/30/2008 |
| 7413034 | Steering tool A steering tool for use in drilling a borehole, including a tubular housing, a tool actuating device movably supported within the housing, a plurality of hydraulically actuated steering devices circumferentially spaced about the housing, and a hydraulic control syst... | 08/19/2008 |
| 7413021 | Method and conduit for transmitting signals An expandable tubular sleeve having utility for lining a downhole tubular member includes a tubular body having a portion that is predisposed to initiate expansion thereof under the application of internal fluid pressure. The predisposed portion of the body may be a... | 08/19/2008 |
| 7407021 | Methods for the installation of earth anchors An adapter attachment for an auger which includes an connecting shaft sized and shaped to be attached to the pilot bit hole present in the end of an auger, after the removal of pilot bit. The adapter also includes a bolt flange for connection to a foundation anchor ... | 08/05/2008 |
| 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 |
| 7377337 | Downhole drilling tool A downhole drilling tool 136 comprises a drillstring 138, a drilling head 140, and a freewheel 144 for transferring drive from the drillstring to the drilling head. The freewheel 144 is positioned between the drillstring 138... | 05/27/2008 |
| 7374375 | Shank for a rotary and/or percussion working tool A shank of a rotary-percussion working tool (2) has at least two, diametrically opposite locking grooves (5a, 5b) each having a locking shoulder (11) at an axial locking end (3) and spaced from a free end surface (... | 05/20/2008 |
| 7364203 | Reinforcement for arched type structure with beveled screwed ends An electrical isolation connector subassembly for interconnecting adjacent tubular drill rods of a drilling system used in drilling bore holes in earth formations, the connector comprising an electrically insulative sleeve being sandwiched between two electrically i... | 04/29/2008 |
| 7360796 | Electrical isolation connector subassembly for use in directional drilling An electrical isolation connector subassembly for interconnecting adjacent tubular drill rods of a drilling system used in drilling bore holes in earth formations, the connector comprising an electrically insulative sleeve being sandwiched between two electrically i... | 04/22/2008 |
| 7353888 | Tension/collar/reamer assemblies and methods The present invention provides drilling assembles and methods that are especially useful for a bottom hole drilling assembly for drilling/reaming/or other operations related to drilling a borehole through an earth formation. In one embodiment, the drilling assembly ... | 04/08/2008 |
| 7347283 | Using a rotating inner member to drive a tool in a hollow outer member A rotating inner member is used to drive a downhole tool housed within the hollow outer member of a dual-member drill string. The downhole tool preferably will be adapted to receive rotational energy from the inner member. In a preferred embodiment, the downhole too... | 03/25/2008 |
| 7348892 | Pipe mounted telemetry receiver Methods and apparatus for receiving a telemetry signal with a receiver that is moveably disposed within a drillstring. In certain embodiments, the system comprises a surface module coupled to the upper end of a drillstring, an upper module detachably connected to th... | 03/25/2008 |
| 7341116 | Drilling efficiency through beneficial management of rock stress levels via controlled oscillations of subterranean cutting elements A device and system for improving efficiency of subterranean cutting elements uses a controlled oscillation super imposed on steady drill bit rotation to maintain a selected rock fracture level. In one aspect, a selected oscillation is applied to the cutting element... | 03/11/2008 |
| 7322378 | Semiconductor apparatuses and pipe supports thereof A semiconductor apparatus with a modified pipe support. The apparatus comprises an outer pipe, an inner pipe, and a pipe support. The support comprises a seat and a support ring. The seat comprises a tubular portion for supporting an outer pipe at a top end. The sup... | 01/29/2008 |
| 7318490 | Connection design and sonde housing assembly for a directional drill Drill stem elements and connections are shown with advantages such as being mechanically robust. The absence of a side access window in a sonde housing is one design feature that provides robust mechanical properties. Further advantages of sonde housings include bei... | 01/15/2008 |
| 7309195 | Shank for a rotary and/or percussive tool A shank for a rotary and percussive tool has a locking groove (3) arranged between two guided regions (1a, 1b) and axially closed at its opposite ends for receiving at least one radially displaceable and axially displaceable, withi... | 12/18/2007 |
| 7290623 | Welded joints for rotary-vibratory drills having reduced stress A drill string for a rotary-vibratory drill comprises a plurality of drill pipes. Each of the drill pipes has a longitudinal axis and at least one end. A female connector member and a male connector member are between the ends of adjacent said drill pipes, the femal... | 11/06/2007 |
| 7291303 | Method for bonding a transmission line to a downhole tool An apparatus for bonding a transmission line to the central bore of a downhole tool includes a pre-formed interface for bonding a transmission line to the inside diameter of a downhole tool. The pre-formed interface includes a first surface that substantially confor... | 11/06/2007 |
| 7284623 | Method of drilling a bore hole A method for drilling a borehole through a production zone underlying an overburden of various earth formations includes drilling the borehole through the overburden with a first drill bit. The first drill bit being selected to optimize at least one drilling perform... | 10/23/2007 |
| 7281594 | Rock drill bit The present invention relates to a rock drill bit for percussive drilling. The drill bit comprises a bit body, a head portion defining a longitudinal center axis. The head portion includes an axially forward rock-crushing surface and a skirt that extends axially rea... | 10/16/2007 |
| 7278478 | Tubing string anchoring tool An anchoring tool anchors a tubing string within a surrounding well casing against rotation in either clockwise or counter clockwise directions. The tool includes a tubular housing for connection in line with the tubing string. A fixed jaw is fixedly mounted on the ... | 10/09/2007 |
| 7267185 | Bit retainer system A bit retainer system comprising a casing, a driver sub adapted to be disposed around a shank of a bit, and a bit retainer. The driver sub comprises a threaded connector, a threaded pin end configured to engage with the hammer case, and a stop. The bit retainer comp... | 09/11/2007 |
| 7261169 | Shank for a rotary/percussion tool A shank for a working tool has at least three recesses (5) provided within the lockable region (3) and arranged in a cross-section (c-c) to the tool axis (A) at least at angles of 0°, 120°, and 240° within the radial reference dimension (R) of the s... | 08/28/2007 |
