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| Number | Title | Issue Date |
| 8181720 | Sealing system and bi-directional thrust bearing arrangement for a downhole motor A bearing assembly for a downhole motor comprises a housing having an upper end, a lower end, a radially inner surface, and a radially outer surface. In addition, the bearing assembly comprises a mandrel rotatably disposed within the housing. Further, the bearing as... | 05/22/2012 |
| 8151908 | Jet motor for providing rotation in a downhole tool An exemplary embodiment of the jet motor includes a control sleeve, and power shaft having at least one opening thereon. The power shaft is rotatable in relation to the control sleeve. The power shaft has a central longitudinal shaft axis and upper and lower ends. T... | 04/10/2012 |
| 8118117 | Thrust bearing assembly A thrust bearing assembly comprising a bearing runner and a bearing carrier, the carrier defining thrust pad sites annularly around the carrier, with a thrust pad disposed at a site and with the carrier limiting movement of the thrust pad in a direction generally ra... | 02/21/2012 |
| 8069933 | Bearing assemblies, and bearing apparatuses and motor assemblies using same Various embodiments of the present invention relate to bearing assemblies configured to accommodate non-uniform loading and misalignment with an adjacent bearing assembly. In one embodiment of the present invention, a bearing assembly for use in a subterranean drill... | 12/06/2011 |
| 8061448 | Hydraulic braking device for turbine, turbine equipped with such a device and drilling equipment comprising such a turbine The hydraulic braking device (10) to be installed in a turbine (2) provided with a turbine shaft (4) comprising at least one body (12) connected to the said turbine shaft (4). When the said hydraulic braking device (10 | 11/22/2011 |
| 8016052 | Thrust bearing assembly A thrust bearing assembly comprising a rotating bearing runner and a stationary bearing carrier, the carrier defining a plurality of thrust pad sites annularly around the carrier, with a thrust pad disposed at a site and with the carrier constraining movement of the... | 09/13/2011 |
| 7938200 | Apparatus and method for a hydraulic diaphragm downhole mud motor A downhole motor to drill a wellbore including a pumping apparatus having a first chamber configured to receive a first fluid and a second fluid, and a first flexible diaphragm disposed with the first chamber configured to separate the first and second fluid, wherei... | 05/10/2011 |
| 7918290 | Systems and methods for protecting drill blades in high speed turbine drills A drilling assembly in an elongated hole including a housing defining an interior with a plurality of motor stages in the interior. Each motor stage has at least one blade with supporting platform surfaces. A casing within the interior surrounds the plurality of mot... | 04/05/2011 |
| 7870913 | Bearing assemblies, and bearing apparatuses and motor assemblies using same Various aspects of the present invention relate to bearing assemblies configured to accommodate non-uniform loading and misalignment with an adjacent bearing assembly. In one aspect of the present invention, a bearing assembly is disclosed. The bearing assembly comp... | 01/18/2011 |
| 7832503 | Downhole motor with a continuous conductive path A downhole drilling motor comprising a housing and a shaft extending within the housing, wherein the shaft is movable relative to the housing. Further, a conducting path extends within the housing between a first axial position and a second axial position. The condu... | 11/16/2010 |
| 7802638 | Drive system The invention relates to a drive system, in particular a downhole drilling assembly (10). In the preferred embodiment, a bearing mechanism (14,24) of the assembly (10) is isolated from a gear mechanism (20) of the assembly (10), to... | 09/28/2010 |
| 7712550 | Thrust bearing assembly A thrust bearing assembly comprising a rotating bearing runner and a stationary bearing carrier, the carrier defining a plurality of thrust pad sites annularly around the carrier, with a thrust pad disposed at a site and with the carrier constraining movement of the... | 05/11/2010 |
| 7703551 | Fluid driven drilling motor and system A fluid driven drilling motor and system includes a flex shaft between the rotor and a cylindrical flow collar. The end of the flow collar opposite from the flex shaft has a bore in fluid communication with a drill bit. Ramped apertures are formed in the side wall o... | 04/27/2010 |
| 7686102 | Jet motor for providing rotation in a downhole tool The invention comprises a downhole jet motor, and a method of using same, that can be utilized to drill or to clean a well bore or tubing. The jet motor comprises a power shaft partially surrounded by a control sleeve defining a blind annular space, closed at the up... | 03/30/2010 |
| 7552782 | Thrust-bearing assembly Thrust-bearing assemblies, and thrust-bearing apparatuses and downhole motors incorporating such thrust-bearing assemblies are disclosed. In one aspect of the present invention, a thrust-bearing assembly is disclosed. The thrust-bearing assembly comprises a seat inc... | 06/30/2009 |
| 7451835 | Downhole turbine In one aspect, a downhole assembly has a downhole tool string component with a bore adapted to accommodate drilling mud. A fluid barrier is disposed within the bore and has a cylindrical portion substantially aligned with the bore. A drive shaft is sealed within and... | 11/18/2008 |
| 7448455 | Turbodrill with asymmetric stator and rotor vanes A turbodrill has rotor vanes and stator vanes that are asymmetric with respect to each other. The rotor blade on which the rotor vanes are disposed has a reaction of less than about 0.5. A method of designing a turbodrill comprises optimizing a first design of stato... | 11/11/2008 |
| 7434634 | Downhole turbine In one aspect, a downhole assembly has a downhole tool string component with a bore adapted to accommodate drilling mud. A fluid barrier is disposed within the bore and has a cylindrical portion substantially aligned with the bore. A drive shaft is sealed within and... | 10/14/2008 |
| 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 |
| 7416034 | Drive system The invention relates to a drive system, in particular a downhole drilling assembly (10). In the preferred embodiment, a bearing mechanism (14, 24) of the assembly (10) is isolated from a gear mechanism (20) of the assembly (10), t... | 08/26/2008 |
| 7405998 | Method and apparatus for generating fluid pressure pulses Apparatuses and methods for generating fluid pressure pulses are disclosed. An example apparatus may include a chamber that can collect fluid and an upstream ported disc coupled to a downstream end of the chamber. The upstream ported disc may rotate about a central ... | 07/29/2008 |
| 7389832 | Hydrostatic mechanical seal with local pressurization of seal interface A hydrostatic mechanical seal assembly includes a locally deployed pump for pressurizing a lubricant fluid between the opposing faces of a mating ring and a sealing ring. In one exemplary embodiment, such pressurization may be achieved via a device that converts the... | 06/24/2008 |
| 7383898 | Inner and outer motor with eccentric stabilizer A downhole motor arrangement for a directional drilling comprises a first motor component (22), a second motor component (24) encircling at least part of the first motor component (22), and a third motor component (26) encircling at least... | 06/10/2008 |
| 7360595 | Method and system for underground treatment of materials A method for underground treatment of subsurface materials comprises providing an injection pattern and a recovery pattern, the injection pattern and the recovery pattern located proximate to a subsurface treatment zone and at least one of the injection pattern and ... | 04/22/2008 |
| 7360609 | Directional drilling apparatus A general housing encloses a drilling motor that can be disabled to permit optimum rotary drilling practice. A mode selector responds to manipulation of the drilling fluid flow rate and permits activation of the drilling motor to drive a drill bit. The general housi... | 04/22/2008 |
| 7360594 | Drilling with casing latch A latch assembly, and methods of using the latch assembly, for use with a bottom hole assembly (BHA) and a tubular, are provided. In one embodiment, the latch assembly is disposable within the tubular, configured to be rotationally and axially coupled to the tubular... | 04/22/2008 |
| 7354348 | Hollow universal joint A hollow universal joint having a first member, a second member and a first hollow yoke ring coupling the first member to the second member to transfer rotational motion between the first and second members. The first hollow yoke ring has a first central axis. The f... | 04/08/2008 |
| 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 |
| 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 |
| 7325631 | Mill and pump-off sub A downhole mill includes a plurality of cutters extending generally radially from a center region to a gage diameter, wherein the plurality of cutters includes a first serrated cutter blade having a plurality of peaks and valleys along its length. The plurality of c... | 02/05/2008 |
| 7318489 | Hydraulic motor arrangement and method of operating a hydraulic motor A hydraulic motor for use in subterranean drilling operations in which a drive fluid within a first reservoir is forced through the motor by a high pressure working fluid, such as drilling mud, the drive fluid entering a second reservoir upon exiting the motor. Upon... | 01/15/2008 |
| 7314100 | System for use in a bore hole for axially coupling a tubular end and a mandrel System for coupling two tubular ends for use in a well bore, the system comprising a first tubular end, a second tubular end for inserting into the first tubular end in axial alignment thereof, thereby forming an annular space between the first tubular end and the s... | 01/01/2008 |
| 7306059 | Thrust bearing assembly A thrust bearing assembly in which each thrust pad is individually mounted on a deflection element. An embodiment of the invention comprises a rotating bearing runner having a wear resistant face and a stationary bearing carrier defining a plurality of cavities disp... | 12/11/2007 |
| 7306031 | Tubing string rotator and method A tubing string rotator for rotating a tubing string in a well having a downhole pump. The tubing string rotator includes a housing having a first portion and a second portion. At least the second portion of the housing is adapted to be operatively connected to the ... | 12/11/2007 |
| 7303007 | Method and apparatus for transmitting sensor response data and power through a mud motor Apparatus and methods for establishing electrical communication between an instrument subsection disposed below a mud motor and an electronics sonde disposed above the mud motor in a drill string conveyed borehole logging system. Electrical communication is establis... | 12/04/2007 |
| 7299886 | Stabilized down hole drilling motor A down hole drilling motor includes a stator housing having an exterior surface, an upper end, a lower end, an upper vane mounting region at the upper end and lower vane mounting region at the lower end. An upper mounting sleeve engages the upper vane mounting regio... | 11/27/2007 |
| 7299880 | Surge reduction bypass valve Methods and apparatus are provided for reducing surge pressure while running casing into a wellbore. The apparatus includes a running string for running casing having a diverter tool therein. The diverter tool has one or more bypass ports between its upper and lower... | 11/27/2007 |
| 7290625 | Reverse-circulation drilling method and system A reverse-circulation drilling method and system includes a drill bit, a drill string having drill rods, and a rotary table or power swivel for bringing the drill bit into rotation by means of the rods. The system includes a positive-displacement pump made up of a s... | 11/06/2007 |
| 7287607 | Directional drilling apparatus A drilling motor is housed in the upper portion of a housing, with a drive shaft extending through a lower portion of the housing. The two portions are coupled by bearing that has an axis of rotation that is tilted a small amount relative to the axes of both portion... | 10/30/2007 |
| 7278211 | Bore hole tool assembly and method of designing same A bore hole tool assembly utilizes a multi-stage bearing system deployed between an inner mandrel and an outer tool housing wherein each bearing stage includes bearing element deployed between two deformable elements. The deformable elements are selected, based on t... | 10/09/2007 |
