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| Number | Title | Issue Date |
| 8146682 | Apparatus and methods of milling a restricted casing shoe A method of removing a restriction in a tubular located in a well includes providing a drilling assembly with a drill bit and a reamer, the reamer having a cutting structure for removing the restriction; drilling through a lower portion of the tubular; expanding the... | 04/03/2012 |
| 8011449 | Method and apparatus for directional drilling The present invention is directed at a pullhead/reamer for use in digging a hole in the ground; comprising a first end (22) shaped to receive a mandrel struts, connecting the first end to the second end, the struts defining a set of open flutes (48) th... | 09/06/2011 |
| 7958950 | Reamer and methods for directional drilling A reamer for underground boring is provided. The reamer includes at least: (a) a center mandrel, wherein the center mandrel defines a mandrel axis; (b) a plurality of radial members extending radially from the center mandrel; (c) a plurality of cutting heads, wherei... | 06/14/2011 |
| 7891439 | Method of multistage manufacturing a ground bore In a method for multistage manufacture of a borehole between two earth shafts, a drilling device drills in a first direction a pilot bore between a starting shaft and an end shaft and lines the pilot bore with pipes. Subsequently, the pilot bore is expanded in a sec... | 02/22/2011 |
| 7730969 | Reamer and methods for directional drilling A reamer for underground boring is provided. The reamer includes at least: (a) a center mandrel, wherein the center mandrel defines a mandrel axis; (b) a plurality of radial members extending radially from the center mandrel; (c) a plurality of cutting heads, wherei... | 06/08/2010 |
| 7699123 | Bore hole sleeve reaming apparatus and method A bore hole sleeve reaming apparatus which is characterized by one or more subterranean bore clearing devices or sleeves for use with one or more clearing or bursting heads attached to a pull rod or cable and a pulling apparatus. One or more tapered sleeves are atta... | 04/20/2010 |
| 7654340 | Directional reaming system A horizontal directional drilling system is used to drive operation of a guidable reamer assembly connected to a drill string. The guidable reamer assembly preferably has a cutting member with a central longitudinal axis and a support member also having a central lo... | 02/02/2010 |
| 7624817 | Bore hole reaming apparatus and method A bore hole reaming apparatus characterized by one or more cleaning devices such as bursting heads attached to a pull rod and typically having one or more mandrels attached thereto in tandem for pulling a length of pipe through a pre-bored opening using a pulling ap... | 12/01/2009 |
| 7490680 | Process and system for drilling and lining a bore hole An apparatus is provided for the drilling of a borehole and its simultaneous lining with cement or the like by the same apparatus. The apparatus comprises a combination spray bead and reamer head, a means to drive the reamer head through a borehole and a means for d... | 02/17/2009 |
| 7422076 | Autoreaming systems and methods Methods and systems for controlling movement of a bit of a drilling assembly during reaming of an already-drilled hole; the methods, in certain aspects, including determining a ream speed for downward movement of the bit in the hole, moving the bit downward in a hol... | 09/09/2008 |
| 7413031 | Apparatus and method for maintaining control of a drilling machine An apparatus is provided for maintaining control of a machine which produces thrust, rotation or other outputs in response to input signals. The apparatus has two distinct parts, namely the operator input portion and the output portion. The operator input portion co... | 08/19/2008 |
| 7389829 | Method and apparatus for forming bored hole A method and apparatus for creating a reamed hole below the surface are disclosed. The reaming apparatus is arranged to be connected to one or more boring stems and has an interior section and an exterior section. The interior section is rotatable independently of t... | 06/24/2008 |
| 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 |
| 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 |
| 7337859 | Method and device for drilling a channel In a drilling method for creating a channel leading from surrounding soil into a shaft which is separated from the soil by a wall, a channel is drilled through the soil from a starting pit in the direction of the shaft using a first drill head. The first drill head ... | 03/04/2008 |
| 7264048 | Slot cavity A method for accessing a subterranean zone from the surface includes drilling a substantially vertical well bore from the surface to the subterranean zone and forming a slot cavity in the substantially vertical well bore proximate to the subterranean zone. The slot ... | 09/04/2007 |
| 7255516 | Method and apparatus for replacement of underground pipe An impactor for use with a directional boring machine for replacement of underground pipes includes a bursting head having a rearwardly opening recess and a front end opening that communicates with the recess. An inlet pipe is connected at its front end to a distal ... | 08/14/2007 |
| 7243737 | Interchangeable reamer The present disclosure relates to back reamers having bases including leading ends that can be connected to a drill string and trailing ends that can be connected to product desired to be pulled through a bore being backreamed. The back reamers also include reaming ... | 07/17/2007 |
| 7240728 | Expandable tubulars with a radial passage and wall portions with different wall thicknesses A tubular liner including a first tubular portion, a second tubular portion, and an intermediate tapered tubular portion coupled to, and positioned between, the first and second tubular portions. ... | 07/10/2007 |
| 7237628 | Fixed cutter drill bit with non-cutting erosion resistant inserts The present invention is directed to a drill bit with non-cutting erosion resistant inserts. In one illustrative embodiment, the apparatus comprises a matrix drill bit body comprising a plurality of blades, a plurality of cutting elements positioned on each of the b... | 07/03/2007 |
| 7225881 | Passive logging sonde auger tool The auger is attached to a spiral gear and a spring, the apparatus then being connected to the downhole, leading end of the logging sonde. When the auger nose of the modified sonde assembly strikes any of various obstructions on the sidewall that cause it to lose mo... | 06/05/2007 |
| 7219750 | Process and system for drilling and lining a bore hole An apparatus is provided for the drilling of a borehole and its simultaneous lining with cement or the like by the same apparatus. The apparatus comprises a combination spray head and reamer head, a means to drive the reamer head through a borehole and a means for d... | 05/22/2007 |
| 7216724 | Coupling for dual member pipe A coupling assembly to interconnect an inner member and an outer member of a dual member drill string in torque transmitting engagement is disclosed. The coupling assembly is adapted to transmit torque input from both members to a downhole tool. In one embodiment, t... | 05/15/2007 |
| 7213644 | Cavity positioning tool and method In accordance with the teachings of the present invention, a method is provided for preventing formation of sludge in a subsurface cavity having particulate laden fluid disposed therein. The method includes positioning a downhole device having a fluid agitator into ... | 05/08/2007 |
| 7207395 | Method and system for testing a partially formed hydrocarbon well for evaluation and well planning refinement A method and system for testing a partially formed well includes forming a first well bore intersecting a subterranean formation. The first well bore includes a portion of a planned well having a first configuration. A production characteristic of the subterranean f... | 04/24/2007 |
| 7207390 | Method and system for lining multilateral wells In accordance with one embodiment of the present invention, a method for lining a lateral wellbore includes drilling a main wellbore extending from a surface to a subterranean zone, casing the main wellbore with a main casing having a plurality of lateral wellbore w... | 04/24/2007 |
| 7195079 | Directional reaming system A horizontal directional drilling system is used to drive operation of a guidable reamer assembly connected to a drill string. The guidable reamer assembly preferably has a cutting member with a central longitudinal axis and a support member also having a central lo... | 03/27/2007 |
| 7168509 | Percussive reamer and method of use thereof A percussive drill bit or reamer having a plurality of bit segments formed into a circular pattern suitable for drilling or reaming a hole. The bit segments are close-fitted and shaped to increase the cutting area and improve efficiency. Pressurized air exhausted fr... | 01/30/2007 |
| 7163063 | Method and system for extraction of resources from a subterranean well bore A method for stimulating production of resources from a coal seam includes forming a drainage well bore in the coal bed that has a first end coupled to a ground surface and a second end in the coal seam. The method further includes inserting a liner into the well bo... | 01/16/2007 |
| 7152702 | Modular system for a back reamer and method A modular back reamer to be used in subterranean drilling includes a drive stem, a reamer body having a plurality of receptacles, wherein the receptacles are configured to retain a cutting leg assembly, and a plurality of shims engaged within the receptacles to secu... | 12/26/2006 |
| 7152700 | Dual wall drill string assembly A coil tubing or jointed dual wall drill string assembly for subsurface drilling. The drill string assembly includes a metallic outer tube having an outer tube first end and an outer tube second end opposite the outer tube first end. The assembly also includes a fle... | 12/26/2006 |
| 7143843 | Traction control for downhole tractor Apparatus, system and methods useful for controlling the traction of a downhole tractor in a borehole include the capability of repeatedly adjusting the normal force applied to at least one component that causes movement of the tractor in the borehole. ... | 12/05/2006 |
| 7137460 | Back reaming tool A back reaming tool is disclosed which includes a tool body adapted to be coupled to a drill string, and at least cutting structure mounted to a leg and having cutting elements disposed thereon. The leg is removably coupled to the tool body. ... | 11/21/2006 |
| 7131790 | Boring and conduit/pipe system An extension rod has an interior end and an exterior end. The exterior end is formed with male screw threads. A primary bit has a cylindrical interior end and a conical exterior. Female threads at the interior end releasably couple with the extension rod. A secondar... | 11/07/2006 |
| 7128168 | Reamer apparatus for ground boring machine The invention provides a reamer apparatus for a ground boring machine that is capable of restricting increase in drawing resistance when performing drawing of a buried pipe by using a reamer and of efficiently performing drawing operations of the buried pipe without... | 10/31/2006 |
| 7118307 | Cooling water intake system A cooling water intake system is configured to minimize entrainment, impingement and thermal plumes associated with the operation of onshore industrial facilities, such as a power plant, and includes a delivery system guiding ground waters from under the sand bottom... | 10/10/2006 |
| 7111694 | Fixed blade fixed cutter hole opener A hole opener including a tool body having upper and lower ends. The upper and lower ends may be coupled to adjacent drilling tools. At least two blades are formed on the tool body and are arranged so that the hole opener is positioned concentric with a wellbore, an... | 09/26/2006 |
| 7111693 | System and method for locating and tracking a boring tool A system for monitoring the position and orientation of a downhole tool assembly having multiple beacons. In a preferred embodiment the first and second beacons are supported by the downhole tool assembly. Both beacons are adapted to transmit signals that are indica... | 09/26/2006 |
| 7108082 | Hole reaming apparatus and method An enhanced reaming apparatus and method are disclosed. A reaming assembly may have a motor and a pump that provide linear force, torsional force, and pressurized drilling fluid to a reamer to cause the reamer to enlarge the bore of a pilot hole. The reamer may have... | 09/19/2006 |
