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| Number | Title | Issue Date |
| 8141660 | Excavator apparatus for underground excavation An excavator for underground excavating arranged to perform excavating work with low vibration and low noise. A rotary excavator and an underground excavating method are also provided. The excavator (1) for underground excavating comprises a plurality of bits... | 03/27/2012 |
| 8047305 | Vacuum feed supply system for drilling fluid additives A system for forming a subterranean wellbore may include a pump and an additive supply. The pump pumps a drilling fluid into the wellbore while also generating a pressure differential that draws an additive across a supply line connected to the additive supply. The ... | 11/01/2011 |
| 7992653 | Foamed fluid additive for underbalance drilling A method of drilling or gas-lifting is disclosed where the methods including the use of a foaming agent and a gas, where the foaming agent is a keratin and the hydrostatic pressure of the fluid in the well is for a portion of the drilling or gas-lift operation less ... | 08/09/2011 |
| 7918289 | Method of completing a well with sand screens A method for drilling and completing a wellbore that includes drilling a wellbore through a subterranean formation with a wellbore fluid, the wellbore fluid comprising: a base fluid; and micronized weighting agent; and disposing a sand screen in an interval of the w... | 04/05/2011 |
| 7882903 | Cuttings bed removal tool A cuttings bed removal tool for use on a drill string in a well bore includes: a sub having a region of enlarged outer diameter over the string diameters indicated by its upper end connection and an indicator disposed downhole of the region of enlarged outer diamete... | 02/08/2011 |
| 7784566 | Bit balling treatment A solid body contains a surfactant and crushed walnut hulls. The solid body is shaped to predetermined dimensions that permit passage through the central interior opening of drill pipe. The solid body dissolves in drilling mud for delivery of a pill to the annulus t... | 08/31/2010 |
| 7614462 | Drilling fluids Drilling fluids, drilling lubricants for such drilling fluids, and methods of drilling wells, particularly oil and/or gas wells using such drilling fluids. The inclusion of lubricants affords lubrication in drilling fluids in which the lubricant compatibility and/or... | 11/10/2009 |
| 7441609 | Method of decreasing the disintegration of shale-containing cuttings and drilling fluid therefor The invention provides a method of enhancing the recovery of shale-containing cuttings during the drilling of a borehole in a shale-containing subterranean formation which comprises adding to the drilling fluid circulating in the borehole a finely ground, very spari... | 10/28/2008 |
| 7439210 | Inhibitive water-based drilling fluid system and method for drilling sands and other water-sensitive formations An inhibitive water-based polymer mud system and method for using the system in drilling and in stabilizing wellbores is disclosed for use in water sensitive formations as an alternative to oil-based muds. The system comprises a non-ionic low molecular weight polyac... | 10/21/2008 |
| 7440876 | Method and apparatus for drilling waste disposal engineering and operations using a probabilistic approach A method for determining distribution data for a disposal domain parameter to increase assurance in a cuttings injection process, including performing a fracturing simulation using a site specific datum to obtain a fracturing result, determining a probability of cre... | 10/21/2008 |
| 7398838 | Impact excavation system and method with two-stage inductor A system and method for excavating a subterranean formation according to which a fluid is introduced into a vessel to draw a plurality of impactors into the vessel to form a suspension. The suspension is discharged from the vessel and into another vessel, and fluid ... | 07/15/2008 |
| 7373978 | Method for drilling and completing wells A method for drilling and completing a gravel packed well is disclosed. The method comprises drilling a wellbore with a drilling fluid, conditioning the drilling fluid, running the gravel packing assembly tools to depth in the wellbore with the conditioned drilling-... | 05/20/2008 |
| 7367410 | Method and device for liner system Method for drilling and lining a well wherein at least one liner (1, 2, 32) with a larger external diameter than the substantial part of a drilling riser (10) is pre-installed at a point below the substantial part of the drilling riser (10). A b... | 05/06/2008 |
| 7367405 | Electric pressure actuating tool and method Disclosed herein is a downhole tool actuation arrangement. The arrangement includes a housing having a chamber, at least one piston in operable communication with the chamber and at least one electrode exposed to the chamber. The electrodes are receptive to a power ... | 05/06/2008 |
| 7363691 | Method and apparatus for forming a mono-diameter wellbore casing A mono-diameter wellbore casing. The mono-diameter wellbore casing is formed by plastically deforming and radially expanding a first tubular member within a wellbore. A second tubular member is then plastically deformed and radially expanded in overlapping relation ... | 04/29/2008 |
| 7363690 | Method and apparatus for forming a mono-diameter wellbore casing A mono-diameter wellbore casing. The mono-diameter wellbore casing is formed by plastically deforming and radially expanding a first tubular member within a wellbore. A second tubular member is then plastically deformed and radially expanded in overlapping relation ... | 04/29/2008 |
| 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 |
| 7350589 | Telemetering system A pipe installation system has a pipe composed of sections that are added and removed to increase and decrease a length of the pipe. The system further has a cable storage spool for stowing a length of cable in a compact manner inside the pipe and for paying out the... | 04/01/2008 |
| 7347259 | Downhole oilfield erosion protection by using diamond A device for use with components for a downhole tool—such as a throat, a nozzle, or a diffuser—used for cleaning a wellbore, are disclosed which decreases the erosion of the components. The device may be comprised of a hardened material, such as stack of pure di... | 03/25/2008 |
| 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 |
| 7343986 | Drilling fluids This invention relates to drilling fluids, to drilling lubricants for such drilling fluids and to methods of drilling wells, particularly oil and/or gas wells using such drilling fluids. In particular, the invention relates to the inclusion of lubricants which affor... | 03/18/2008 |
| 7341117 | Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell An assembly and methods for constructing a MONOWELL includes a monodiameter casing disposed in a monodiameter wellbore having diametric efficiency with a monobore production delivery system disposed within the monodiameter casing. An assembly for constructing a mono... | 03/11/2008 |
| 7328755 | Hydraulic drill bit assembly In one aspect of the present invention a drill bit assembly has a body portion intermediate a shank portion and a working portion. The working portion has at least one cutting element and the body portion has at least a portion of a jackleg apparatus. The jackleg ap... | 02/12/2008 |
| 7323434 | Electropositive production well treating fluid and method of preparing the same An electropositive and water-based production well treating fluid system exhibits electropositivity by using a cationic viscosifier meanwhile matched with a cationic fluid loss additive and, optionally, contains a mud-building agent, an electrical stabilizing agent,... | 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 |
| 7318557 | Rotary distributor, methods for its use and the use of the distributor A rotary distributor is for use in spreading solid particles and/or liquid from an agricultural machine. The rotary distributor comprises a round distributor having outlet holes arranged peripherally in the horizontal bottom of the housing and connected to outlet pi... | 01/15/2008 |
| 7316275 | Well treating compositions containing water superabsorbent material and method of using the same A well treating composition containing a polysaccharide-based water-superabsorbent material has particularly applicability as a thermal insulating, fracturing or acid stimulation fluid. The water-superabsorbent material is capable of absorbing, at a minimum, its own... | 01/08/2008 |
| 7318013 | Method for slurry and operation design in cuttings re-injection A method for simulating cuttings re-injection in a wellbore, that includes defining a mass balance equation for a solids bed, defining a mass balance equation for a suspension solids, segmenting the wellbore into a plurality of elements, wherein each element include... | 01/08/2008 |
| 7311814 | Process for the production of hydrocarbon fluids Hydrocarbon fluids are produced by hydrocracking a vacuum gas oil stream, fractionating and/or hydrogenating the hydrocracked vacuum gas oil. The fluids typically have ASTM D86 boiling point ranges within the range 100° C. to 400° C. the range being no more than 7... | 12/25/2007 |
| 7311158 | Silicate-containing additives for well bore treatments and associated methods The present invention relates to methods and compositions for use in subterranean operations. More particularly, the present invention relates to additives comprising one or more silicates used to treat tar resident in a well bore, and methods of use. In one embodim... | 12/25/2007 |
| 7308952 | Underbalanced drilling method and apparatus A method of drilling well bore (20) through and below permeable formation (22) bearing such fluids as gas, oil, water wherein drill cuttings may be evacuated by formation fluid (23) being produced through the drill string (26) either by d... | 12/18/2007 |
| 7306042 | Method for completing a well using increased fluid temperature Methods for forming a portion of a wellbore are provided. The well is drilled from a first selected depth to a second selected depth to form a bore through a surrounding earth formation. A fluid heating apparatus is disposed within the bore on a working string. Flui... | 12/11/2007 |
| 7299887 | Roller bit with a journal pin offset from the central axis thereof This invention relates to a single cone bit with offset axis and composite cones for oil and gas drilling, mining and other subterranean drilling operations. The bit consists of a head body and a cone. The cone section has a shape of composite cones. The outer circu... | 11/27/2007 |
| 7293617 | Polycrystaline diamond compact insert reaming tool A reaming tool including a body adapted to couple to a drill string at both axial ends thereof, the body including a plurality of reaming blades affixed at azimuthally spaced apart locations around the circumference of the body, wherein selected ones of the pluralit... | 11/13/2007 |
| 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 |
| 7279447 | Subterranean well and oil or gas stream treatment with bis(3-alkoxyalkan-2-ol) sulfides, sulfones, and sulfoxides: new surface active agents Compositions containing surfactant compounds according to formula (I) ROCH2CH(OH)CR1R2ZCR1R2CH(OH)CH2OR, (I) wherein Z is S, SO, or SO2, can have a range of equilib... | 10/09/2007 |
| 7272912 | Method and apparatus for converting spent water-based drilling muds into fertile indigenous top soil A method and apparatus for converting spent water-based drilling mud into fertile indigenous top soil at a well site or location. The fertile indigenous top soil is produced by the steps of: admixing, at a well site, effective amou... | 09/25/2007 |
| 7270185 | Drilling system and method for controlling equivalent circulating density during drilling of wellbores A drilling system for drilling subsea wellbores includes a tubing-conveyed drill bit that passes through a subsea wellhead. Surface supplied drilling fluid flows through the tubing, discharges at the drill bit, returns to the wellhead through a wellbore annulus, and... | 09/18/2007 |
| 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 |
| 7258176 | Drill bit A drill bit for drilling a well bore using solid material impactors comprising a nozzle and a cavity for accelerating the velocity of the solid material impactors and directing flow of the solid material impactors through the nozzle. The drill bit may also comprise ... | 08/21/2007 |
