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| Number | Title | Issue Date |
| 7320374 | Wellbore top drive systems A system for wellbore operations, the system, in at least certain aspects, including a derrick, a guide beam connected to the derrick, a top drive movable on the guide beam, torque reaction structure connected to the guide beam and to the derrick, skid apparatus hel... | 01/22/2008 |
| 7143849 | Flush mounted spider A gripping apparatus for supporting a tubular includes a longitudinal opening extending therethrough. A bowl is formed on an inner wall of the housing to provide an incline surface for one or more gripping members. As the gripping members are move down along the inc... | 12/05/2006 |
| 7143665 | Mechanical-hydraulic control device for controlling the locking and unlocking movements of rotary disk in a rotary disc table workpiece processing apparatus An improved mechanical-hydraulic device for controlling the locking and unlocking movements of a rotary disk—ring gear system comprises a mechanical screw and screw-nut assembly for driving the disk between a locking position, and an unlocking position, and a coop... | 12/05/2006 |
| 6951256 | Machine tool having coaxial driving device A machine tool includes a housing slidably supported on a table, a moving device may be used to move the housing up and down relative to the table, a tubular shaft is rotatably received within the housing and includes a bore to receive a chuck device which may coupl... | 10/04/2005 |
| 6543121 | Method and apparatus for actuating riveting tooling Riveting apparatus wherein a planetary roller screw delivers the high forces required for actuating the fastener upset tooling. In order that precise control of the entire upset operation may be obtained, a servo-controlled electric motor operates the act... | 04/08/2003 |
| 6536541 | Boring unit for pile foundations Boring unit for pile foundations presenting a tracked vehicle facing the mouth of a hole, a mast (5) which is supported by the tracked vehicle, a rotary table (6) which is slidingly mounted along the mast (5), and at least one excavation element (7) which... | 03/25/2003 |
| 6357100 | Apparatus for actuating tooling Riveting apparatus wherein a planetary roller screw delivers the high forces required for actuating the fastener upset tooling. In order that precise control of the entire upset operation may be obtained, a servo-controlled electric motor operates the act... | 03/19/2002 |
| 5186262 | Powered tool apparatus An electro-hydraulically operated tool apparatus installs and removes bolts of track shoes for assembling and disassembling endless track assemblies. In the assembly procedure, a wrench of the tool apparatus engages the head portion of a track shoe bolt a... | 02/16/1993 |
| 5107941 | Kelly saver drive A split, solid mass, drive bushing-drive plate for use when a kelly is used to sever a length of well casing. The invention fits into the master bushing and prevents wear on the corners between the flat sides of the kelly.... | 04/28/1992 |
| 5090489 | Machining unit for machine tools, in particular for machine tools with several machining stations Machining unit for machine tools with several machining stations with a tool spindle (4), which is accommodated longitudinally displaceably on the inside of a displacement unit (1) which consists of a hollow threaded spindle (5) and a threaded nut (6) wit... | 02/25/1992 |
| 5067567 | Remote handling apparatus Apparatus for remote handling operations in which a tool carrier is provided with elongate resilient members which permit transverse or lateral displacement of the tool carrier to thereby cater for misalignment between the tool carrier and an object to be... | 11/26/1991 |
| 4860837 | Rotary and reciprocating drilling machine The invention relates to a drilling machine comprising a kelly (5) suspended from a boom (3) mounted for pivoting on a chassis (1), a rotary table (7) through which the kelly is movable axially, drive members provided in the rotary table for rotating the ... | 08/29/1989 |
| 4429753 | Rotary pull down pull up drive for drill pipes A gear drive used in water well drilling or blast hole drilling to remove overburden in open pit coal mining, not only rotates the drill pipe but also pulls down or pulls out the drill pipe as it rotates. A hydraulic motor within a housing operates a firs... | 02/07/1984 |
| 4351398 | Well drilling apparatus A drill rig for drilling wells having a derrick adapted to hold and lower a conductor string and drill pipe string. A support frame is fixed to the derrick to extend over the well to be drilled, and a rotary table, for holding and rotating drill pipe stri... | 09/28/1982 |
| 4317493 | Kelly drive bushing adapter An adapter is provided for positioning a kelly drive bushing of a surface drilling assembly in spaced relationship to an associated rotary table. The adapter permits the wireline of an electronic steering assembly to pass through the central aperture in t... | 03/02/1982 |
| 4285215 | Rotary table and kelly guard A kelly bushing guard which encapsulates the rotating parts of a rotary table of a rotary drilling rig. The guard includes a shoe which rests on the fixed floor area of the table. The rotating center is located inwardly of the shoe. A bearing member has a... | 08/25/1981 |
| 4254638 | Positive release means for articulated flexible shaft A flexible shaft is formed of a plurality of linked sections which lock together to provide a rigid shaft when turned in a first direction as for drilling and which, when turned in the opposite direction, unlatch, thereby permitting limited relative movem... | 03/10/1981 |
| 4210213 | Kelly bushing guard A Kelly Bushing Guard is comprised of an outer protective guarding shell which coverably mounts on the kelly bushing portion of a drilling apparatus. The outer shell is comprised of an upper smaller shell section which is mountable on the kelly bushing it... | 07/01/1980 |
| 4095656 | Raise bore drilling In raise bore drilling, a drill string of non-round cross-sectional configuration is connected through a pilot hole from a raise bore bit at the lower end of the pilot hole to a raise bore drilling rig at the upper end of the hole. The drill string is def... | 06/20/1978 |
| 4081163 | Blow out preventer handling system A system for testing and installing a blow out preventer on a floating vessel and offshore drilling rigs, although the system may be used on other rotary drlling rigs, is disclosed. Retractable rotary table supporting beams are disposed over the moon pool... | 03/28/1978 |
| 4073352 | Raise bore drilling machine A raise bore drilling rig is provided for use with a drill string of non-round cross-sectional configuration; the drill string is connectible through a pilot hole from a raise bore bit at the lower end of the pilot hole to the raise bore drilling rig at t... | 02/14/1978 |
| 4057116 | Slim hold drilling A slim hole drilling method wherein a wellbore of a diameter no greater than about 6 inches is drilled using a drill pipe rotation rate of at least 500 rpm and rotating the drill pipe with at least one electric motor operably connected to the drill pipe. ... | 11/08/1977 |
