Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780)
12/2007
12/18/2007US7308936 Methods of improving well bore pressure containment integrity
12/18/2007CA2505628C Apparatus and method for moving drilled cuttings
12/18/2007CA2489300C A valve for a fill up tool
12/18/2007CA2463447C Method of disposing of water from a boiler associated with a drilling or service rig
12/13/2007WO2006127845A3 Drill cuttings re-injection system
12/12/2007EP1540131B8 "top drive swivel apparatus and method"
12/12/2007EP1454031B1 An improved transmission sleeve
12/12/2007CN200989175Y Underbalancing drilling pipe assemblage
12/12/2007CN100354499C Automatic switching three-way circulation joint for oil well
12/11/2007US7306057 Thermal drill cuttings treatment with weir system
12/11/2007US7306042 Method for completing a well using increased fluid temperature
12/11/2007US7306032 Fluid collecting device
12/11/2007CA2492286C Running a completion assembly without killing a well
12/11/2007CA2394121C Flow actuated shut-off valve
12/11/2007CA2320903C Apparatus and method for downhole fluid phase separation
12/06/2007WO2007140310A1 Shear type circulation valve and swivel with open port reciprocating feature
12/06/2007WO2007138170A1 Rock drilling rig and method of controlling thereof
12/06/2007WO2007109803A3 Recovery system
12/06/2007WO2006116023A3 Stimulation tool having a sealed ignition system
12/06/2007US20070278012 Apparatus for separating solids from liquids
12/06/2007US20070278011 Cuttings bed removal tool
12/06/2007US20070278007 Reverse Circulation Pressure Control Method and System
12/05/2007CN200985914Y Reverse circulation parallel pipe squirtpump
12/05/2007CN200985756Y Novel gas drilling dust removing apparatus
12/05/2007CN200985755Y Continuance bounce-back sand-flushing device
12/05/2007CN200985754Y Reversing continue sand-flushing device casing in casing
12/05/2007CN101082270A Drilling fluid treatment system
12/05/2007CN100353027C Under balance drilling bottom pressure automatic control system and method
12/04/2007US7303022 Wired casing
12/04/2007US7303016 Casing with isolated annular space
12/04/2007CA2450432C Packing assembly for rotary drilling swivels
11/2007
11/30/2007CA2589580A1 Cuttings bed removal tool
11/30/2007CA2549342A1 Apparatus for separating solids from liquids
11/28/2007CN200982168Y Water-returning pipe for drilling
11/28/2007CN101078336A Low-pressure well negative pressure continuous sand washing technique
11/27/2007US7300578 Apparatus for recycling of oil-based drilling fluid contaminated with water and water contaminated with oil based drilling fluid
11/27/2007US7299884 Seismic measurements while drilling
11/27/2007US7299880 Surge reduction bypass valve
11/22/2007WO2007134059A1 Downhole swivel apparatus and method
11/21/2007EP1856371A1 Centralization and running tool and method
11/21/2007EP1485574B1 Method and system for controlling well circulation rate
11/21/2007CN200978639Y Skid-mounted multifunctional self-cleaning device for oil well
11/21/2007CN200978638Y Continuous reverse flushing device for horizontal well
11/20/2007US7296640 Solids control system
11/20/2007US7296623 Methods and apparatus for applying torque and rotation to connections
11/20/2007CA2371133C Method of creating a wellbore
11/15/2007WO2007057712A3 Apparatus and method for separating solids from a solids laden fluid
11/15/2007WO2007057711A3 Apparatus and method for separating solids from a solids laden fluid
11/15/2007WO2007057710A3 Apparatus and method for separating solids from a solids laden fluid
11/15/2007US20070261888 Mud pump systems for drilling operations
11/15/2007US20070261858 Apparatus and method for facilitating the connection of tubulars using a top drive
11/15/2007US20070261848 Weighted zero solids loss circulation, fluid loss and insulating annular space fluid systems
11/14/2007EP1853791A1 System and method for well intervention
11/14/2007EP1853367A1 Vibratory separator and method for separating solids from a solids laden drilling fluid
11/14/2007EP1668220B1 Method and device for boring holes in soil or rock
11/14/2007EP1558833B1 Drilling mud filtration device
11/13/2007CA2481847C Methods for increasing production from a wellbore
11/13/2007CA2443111C Method and apparatus for analyzing casing wear and retrieval of metallic fragments
11/13/2007CA2429707C Waste mud agitation system
11/13/2007CA2401075C Wellbore circulation system
11/08/2007WO2007126833A1 Reverse circulation pressure control method and system
11/08/2007US20070256867 Releasable mill
11/08/2007US20070256489 System and Method for Estimating Formation Supercharge Pressure
11/08/2007DE19745766B4 Schlammaufbereitungsstation für eine Tunnelvortriebsmaschine, deren Strebspitze aus durch Druck verdichtetem Schlamm besteht Sludge treatment station for a tunnel boring machine, the longwall top is made of compacted by pressure mud
11/07/2007CN200971760Y Device for implementing double-gradient drilling
11/06/2007US7291651 Carbon dioxide foamed fluids
11/06/2007US7290617 Running a completion assembly without killing a well
11/06/2007US7290607 Device for the separation of the gas phase from a mixture of fluid/gas for use in hydrocarbons producing and injection wells
11/06/2007CA2400602C Pressure boost pump
11/01/2007WO2007124041A2 A system and method for estimating supercharge pressure and initial pressure of a formation
11/01/2007WO2007123410A1 A fluid treatment system and method and use of same
11/01/2007WO2007122528A1 Auxiliary equipment for use with drilling apparatus
11/01/2007WO2007122393A1 Underbalanced drilling method into a gas-bearing formation
11/01/2007WO2007122288A1 Method of controlling operation of rock drilling rig, and rock drilling rig
11/01/2007WO2007121560A1 Drill cutting sampler
11/01/2007WO2007070150A3 Drill cuttings transfer system and related methods
11/01/2007CA2650052A1 A fluid treatment system and method and use of same
11/01/2007CA2649910A1 Drill string flow control valves and methods
10/2007
10/31/2007EP1849957A1 Swivel seal assembly for washpipe
10/31/2007EP1540131B1 "top drive swivel apparatus and method"
10/31/2007EP1425494B1 Swing mounted fill up and circulating tool
10/31/2007CN200968187Y Movable well washing device for oilfield water injection well
10/31/2007CN200968179Y Dust proof water injection type helical reclaiming anchor rod and drill stem Injector
10/30/2007US7287589 Well treatment system and method
10/30/2007US7287544 Triple valve blow out preventer
10/25/2007WO2007118821A1 Separator and process for removing solids from drilling liquids
10/25/2007WO2007118328A1 Methods of preparing hydrocarbon, water and organophilic clay emulsions and compositions thereof
10/25/2007US20070249505 Fracturing subterranean formations by pumping aqueous solutions of erucyl amidopropyl betaine and an acid or salt, preferably sulfonic acids or aromatic carboxylic acids, chlorides of potassium, ammonium, calcium or tetramethylammonium, or calcium bromide, and a corrosion inhibitor; enhanced oil recovery
10/25/2007US20070246431 Method, system and apparatus for separating solids from drilling slurry
10/25/2007US20070246223 Erosion control for use with flow control devices
10/25/2007US20070246217 Downhole Swivel Joint Assembly and Method of Using Said Swivel Joint Assembly
10/25/2007CA2645905A1 Separator and process for removing solids from drilling liquids
10/24/2007EP1847679A1 Underbalanced drilling method into a gas-bearing formation
10/24/2007EP1846332A2 Apparatus for separation of water from oil-based drilling fluid and advanced water treatment
10/24/2007CN200964789Y Submersion type reverse circulation engineered drilling machine
10/23/2007US7285166 Zeolite-containing cement composition
10/23/2007US7284612 Controlling transient pressure conditions in a wellbore
10/23/2007US7284611 Contacting a lost circulation zone with a lost circulation composition; resilient particles and thermoset polymer laminate particles; trimodal particle sizes
10/23/2007CA2287843C Method and apparatus for lateral well drilling utilizing a rotating nozzle
10/23/2007CA2262911C Method and apparatus for the downhole metering and control of fluids produced from wells
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