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| Number | Title | Issue Date |
| 7441596 | Swelling element packer and installation method A sealing element that swells on exposure to well fluids present or added to the wellbore is assembled to the mandrel in a manner to induce circumferential stresses proximately to the inside diameter of the element so as to resist the tendency of the inside diameter... | 10/28/2008 |
| 7434618 | Apparatus for expanding a tubular member An apparatus for expanding a tubular member comprising a support member, an expansion device for radially expanding the tubular member movably coupled to the support member for longitudinal displacement relative to the support member, at least one pressure chamber d... | 10/14/2008 |
| 7380610 | Stripper rubber insert assembly A high-pressure stripper rubber provides inserts and support members that cooperatively support the profile of the rubber against elastic deformation. The inserts dynamically cooperate to resist elastic deformation of the rubber due to down hole pressure. The stripp... | 06/03/2008 |
| 7377593 | Continous extraction of underground narrow-vein metal-bearing deposits by thermal rock fragmentation A method for extracting minerals from a narrow-vein deposit by thermal fragmentation is provided. The method includes locating the vein and determining the extent thereof to form the boundaries of a stope. Access to the stope is prepared by forming a panel having an... | 05/27/2008 |
| 7377339 | System and method for damping vibration in a drill string A system for damping vibration in a drill string can include a valve assembly having a supply of a fluid, a first member, and a second member capable of moving in relation to first member in response to vibration of the drill bit. The first and second members define... | 05/27/2008 |
| 7373976 | Well production optimizing system A method and system for controlling a producing cycle in a well, during the production cycle, for optimizing production from the well including disrupting fluid in a wellbore with a pulse generator to create a pressure pulse transmitted through the fluid in the well... | 05/20/2008 |
| 7367396 | Blowout preventers and methods of use Methods and apparatuses for severing a wellbore tubular, the apparatus, in certain aspects, including: a first member movable toward a tubular to be severed; a second member with a second blade disposed opposite to the first member and movable toward the tubular; a ... | 05/06/2008 |
| 7363983 | ESP/gas lift back-up A well production system has a string of production tubing with a junction having two legs. A first leg is sealed to the casing by a packer located above well perforations. A submersible pump assembly is secured to a second leg, the pump having an intake in the tubi... | 04/29/2008 |
| 7360611 | Flow system for a hydraulic choke solids strainer A strainer system having two separate strainers positioned in parallel, where one strainer can be cleaned while still permitting normal flow through the other strainer. The system flow circuit is arranged so that a high pressure backwashing flow can be applied to on... | 04/22/2008 |
| 7357458 | Boring rig A boring rig (14) for underground boring for excavating purposes and including a substructure (21, 22), a propulsion device, a stabilizing device (31, 32, 35, 36, 37, 38, 39, 42), and a boring unit (20) having a cutter head (29) an... | 04/15/2008 |
| 7357178 | In and relating to downhole tools An improved centralizer is provided for centralization of tubulars such as casings, liners, production tubing, and production screens, in oil/gas wells. Such a centralizer comprises a tubular body, wherein a portion of an outermost surface of the tubular body is for... | 04/15/2008 |
| 7357188 | Mono-diameter wellbore casing A mono-diameter wellbore casing is formed by radially expanding a first tubular liner off of a mandrel into contact with a second tubular liner. The first and second tubular liners are positioned within the wellbore in an overlapping relationship. The overlapping po... | 04/15/2008 |
| 7353889 | Rotary driven pipe-bursting tool An apparatus for bursting pipe is preferably adapted to receive rotational energy from the inner member of a dual-member drill string. In a preferred embodiment, a plurality of pipe-bursting members, driven by the interconnected inner members, cut or burst a subterr... | 04/08/2008 |
| 7350563 | System for lining a wellbore casing A system for lining a wellbore casing includes a support member, an expansion device coupled to an end of the support member, and a tubular liner coupled to the expansion device. The tubular liner includes an expandable tubular member that includes a first tubular p... | 04/01/2008 |
| 7350593 | Electronically controlled earth drilling rig An electronic control, for automated earth drilling using a pneumatic hammer-operated bit, preliminarily weighs a drill string, and, during drilling, automatically maintains a desired weight on the bit, and also maintains a constant rate of drilling progress by regu... | 04/01/2008 |
| 7350596 | Methods and apparatus for expanding the diameter of a borehole A borehole reamer which may be deployed to a desired depth in an existing uncased borehole or below existing casing and used to substantially expand the diameter of the borehole. The diameter may be expanded by an amount that ranges from a fraction to a multiple of ... | 04/01/2008 |
| 7350588 | Method and apparatus for supporting a tubular in a bore A method of supporting a tubular within a bore including the steps of at least partially expanding a sleeve into contact with a bore wall to secure the sleeve within the bore, and engaging a portion of the tubular to be supported with the sleeve to provide hanging s... | 04/01/2008 |
| 7350580 | Subsea pass thru switching system A coupling switches control fluid from a tubing hanger to a downhole completion of a subsea well. The coupling, located between a tubing hanging running tool and a downhole completion, includes a coupling body and a tubing hanger. A hydraulic poppet switches control... | 04/01/2008 |
| 7350577 | Method and apparatus for injecting steam into a geological formation The present invention generally provides a method and apparatus for injecting a compressible fluid at a controlled flow rate into a geological formation at multiple zones of interest. In one aspect, the invention provides a tubing string with a pocket and a nozzle a... | 04/01/2008 |
| 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 |
| 7347273 | Bottom hold completion system for an intermittent plunger A bottom hole assembly for an intermittent lift plunger system includes a retrievable downhole anchor which may be set and reset in one downhole trip, a retrievable packing device, and a plunger stop. ... | 03/25/2008 |
| 7343982 | Tractor with improved valve system A hydraulically powered tractor adapted for advancement through a borehole including an elongate body, aft and forward gripper assemblies, and a valve control assembly housed within the elongate body. The aft and forward gripper assemblies are adapted for selective ... | 03/18/2008 |
| 7331387 | Downhole window finder and method of using the same The present invention relates to a downhole method and apparatus for locating a window in a wellbore casing and determining the depth and orientation of said window. Apparatus of the present invention comprises a body (4) and a window engaging member (6 | 02/19/2008 |
| 7328749 | Method and apparatus for accumulating liquid and initiating upward movement when pumping a well with a sealed fluid displacement device Liquid is accumulated above fluid displacement device which is moveable and sealed within a production chamber defined by a production tubing, and upward movement of the fluid displacement device is initiated to pump liquid and gas from a well, by different magnitud... | 02/12/2008 |
| 7322416 | Methods of servicing a well bore using self-activating downhole tool A method of servicing a well bore comprises deploying into the well bore a zonal isolation device operable to self-set at a sensed location, and self-setting the zonal isolation device to hold at the sensed location without receiving command communications from the ... | 01/29/2008 |
| 7320365 | Methods for increasing production from a wellbore The present invention generally relates to a method for recovering productivity of an existing well. First, an assembly is inserted into a wellbore, the assembly includes a tubular member for transporting drilling fluid downhole and an under-reamer disposed at the e... | 01/22/2008 |
| 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 |
| 7314082 | Methods of improving well bore pressure containment integrity Methods of improving the pressure containment integrity of subterranean well bores are provided. The methods include pumping a fracture sealing composition into the well bore that rapidly converts into a high friction pressure sealing composition which is impermeabl... | 01/01/2008 |
| 7314101 | Inner core barrel head assembly for core tube within a drill string Inner core barrel head assembly (10) includes an upper latch body (24), a plurality of latching balls (26) which are retained in the latch body (24) and a locking sleeve (28) disposed within the latch body (24). The sleeve (... | 01/01/2008 |
| 7311153 | Flow-biased sequencing valve A technique that is usable with a well includes providing a sequencing valve to in a first state to communicate a first flow through a first port of the valve and in a second state close fluid communication through the first port. The technique includes communicatin... | 12/25/2007 |
| 7308953 | Mobile drilling rig An embodied mobile drilling rig is made of three sections, two substructures and a mast section, which are easily transported and installed at a drilling site. Each substructure includes a mast starting section; a floor side box connected to the mast starting sectio... | 12/18/2007 |
| 7306036 | System for reducing adhesion and cohesion between non metallic bailers and side wall of wells A water well bailer. In one embodiment, the bailer includes a tubular housing composed of any polymer used as a plastic, such as, polyethylene, polypropylene, polystyrene, polyesters, polycarbonate, polyvinyl chloride, nylon, poly(methyl methacrylate), polytetrafluo... | 12/11/2007 |
| 7306033 | Apparatus for isolating zones in a well An apparatus and method, particularly useful for isolating zones in a hydrocarbon wellbore. The apparatus includes a tubular section, such as a length of casing or liner tubular, arranged to be run into and secured within the wellbore which may be open hole or alrea... | 12/11/2007 |
| 7306055 | Automatic method for installing mobile drilling rig at a drilling site A method for installing a mobile drilling rig at a drilling site entails transporting the mobile drilling rig to the drilling site, wherein the mobile drilling rig is made three sections: two substructures and a mast section. The substructures are placed parallel to... | 12/11/2007 |
| 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 |
| 7293614 | Multiple impact jar assembly and method A hydraulic jarring tool may be suspended in a well from a wireline, tubular string or drill string, and may be activated to release a tool stuck in the well, or to release the drill string. Each of an upper and lower jarring section include a housing, a piston, a p... | 11/13/2007 |
| 7290617 | Running a completion assembly without killing a well A technique to place a completion assembly in a well while maintaining the well in an underbalanced condition includes running a plug on a deployment tool to a desired depth in the well. The technique includes setting the plug in the well; retrieving the deployment ... | 11/06/2007 |
| 7287591 | Primary electro-mechanical initiating dump bailer device and method of use Electro-mechanically initiated dump bailer devices are disclosed generally comprising a top assembly and one or more bottom assemblies, the top assembly having a means for transferring electrical power from a surface power supply through the top end of the assembly,... | 10/30/2007 |
| 7284601 | Casing conveyed well perforating apparatus and method Disclosed is a device and method for externally perforating a well-bore casing. The perforating apparatus is attached to the outside of the casing itself and is conveyed along with the casing when it is inserted into the well bore. The perforation is accomplished us... | 10/23/2007 |
