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)
04/2005
04/13/2005EP0932745B1 Continuous circulation drilling method
04/13/2005CN2692333Y Sand washing transfer device
04/12/2005US6878447 Polycrystalline diamond partially depleted of catalyzing material
04/12/2005US6877571 Down hole drilling assembly with independent jet pump
04/12/2005US6877565 Arrangement for the removal of cuttings and gas arising from drilling operations
04/12/2005US6877558 Apparatus and method for locating joints in coiled tubing operations
04/07/2005WO2005031107A1 Method and device for boring holes in soil or rock
04/07/2005US20050074302 Apparatus and method for transporting waste materials
04/07/2005US20050072599 Zeolite-containing remedial compositions
04/07/2005US20050072572 Downhole bypass valve
04/06/2005EP1519998A1 System and method for removing particles from a well bore
04/06/2005EP1121508B1 Drilling method
04/06/2005CN2690570Y Spiral flow sand remover
04/06/2005CN2690558Y Fracturing string with sand washing pen pin
04/06/2005CN1603571A Oil well washing method and vehicle-carried oil well washing apparatus
04/06/2005CN1603570A Water-saving drilling system based on liquid partial circulation in hole
04/05/2005US6874579 Creating an underbalance condition in a wellbore
03/2005
03/31/2005WO2005028807A1 Method for pressurized mud cap and reverse circulation drilling from a floating drilling rig using a sealed marine riser
03/31/2005US20050067350 Via contacting with water-in-oil emulsion comprising polyacrylamide
03/31/2005US20050067194 by mixing water in oil emulsions comprising polymer derived from water soluble monomers
03/30/2005EP1519002A1 BOP and separator combination
03/30/2005EP1268032B1 A screen assembly, a support structure, a method of making same and a vibratory shaker
03/30/2005CN2688873Y High-strength boxed stainless steel netting filter of well top
03/30/2005CN2688872Y Choke
03/30/2005CN1601055A Caterpillar chain stepped type drilling machine
03/29/2005CA2290277C Swivel chamber for water actuated wireline drills
03/24/2005WO2004070159A3 Apparatus and methods for drilling a wellbore using casing
03/24/2005US20050061551 Releasable mill
03/24/2005US20050061546 Method for pressurized mud cap and reverse circulation drilling from a floating drilling rig using a sealed marine riser
03/24/2005US20050061514 Well drilling and completions system
03/24/2005US20050061506 Well Treatment System and Method
03/23/2005EP1516104A1 A valve for a fill up tool
03/23/2005EP1228290A4 Drilling formation tester, apparatus and methods of testing and monitoring status of tester
03/23/2005EP1208285A4 Method and apparatus for displacing drilling fluids with completion and workover fluids, and for cleaning tubular members
03/23/2005EP1208284A4 Sliding sleeve assembly for subsurface flow control
03/23/2005CN2687311Y Drilling cementation water injection mud non-return valve
03/23/2005CN1599835A Method and device for injecting a fluid into a formation
03/22/2005US6868906 Closed-loop conveyance systems for well servicing
03/22/2005CA2276169C Downhole cutting separator
03/19/2005CA2654524A1 Improving reservoir communication by creating a local underbalance and using treatment fluid
03/17/2005WO2005024173A1 Drilling arrangement
03/17/2005WO2005023430A1 Waste solid cleaning
03/17/2005WO2004005670A8 Closed loop multiphase underbalanced drilling process
03/17/2005CA2743617A1 Automatic downlink system
03/17/2005CA2537969A1 Waste solid cleaning
03/16/2005EP1226336A4 Drilling formation tester, apparatus and methods of testing and monitoring status of tester
03/16/2005EP1187966A4 Controlling pressure and detecting control problems in gas-lift riser during offshore well drilling
03/16/2005CN2685542Y Drilling column type talus bed removing tool
03/16/2005CN1193160C Drilling apparatus for drilling well in stratum
03/15/2005US6866106 Fluid drilling system with flexible drill string and retro jets
03/09/2005EP1511937A1 Methods and apparatus for unloading a screw compressor
03/09/2005EP1511914A2 Equalizer valve and method of use
03/09/2005EP1082515B1 Offshore drilling system
03/09/2005CN2683830Y Automatic mud pouring installation for well drilling
03/08/2005US6863809 Shale bin/settling tank/centrifuge combination skid
03/08/2005US6863183 Shale shaker
03/03/2005WO2005019599A1 Methods of drilling and consolidating subterranean formation particulates
03/03/2005WO2005019596A1 Method and apparatus for adding a tubular to drill string with diverter
03/03/2005WO2005019594A1 Releasable mill
03/03/2005US20050045384 Methods of drilling and consolidating subterranean formation particulate
03/03/2005US20050045383 Method, apparatus and system for substantially reducing or eliminating the plugging of downhole sand control screens
03/03/2005US20050045382 Apparatus and method to reduce fluid pressure in a wellbore
03/03/2005US20050045337 Method for completing a well using increased fluid temperature
03/03/2005US20050045336 Propellant treatment and continuous foam removal of well debris
03/03/2005US20050045334 Propellant treatment and continuous foam removal of well debris
03/03/2005CA2539039A1 Method and apparatus for adding a tubular to drill string with diverter
03/02/2005EP1510650A2 Downhole surge pressure reduction and filtering apparatus
03/02/2005EP1264073B1 Downhole surge pressure reduction and filtering apparatus
03/02/2005CN2682192Y Well washing device
03/02/2005CN1587634A Compressed air circulation sand cleaning process and matching device
03/01/2005US6861137 High volume density polycrystalline diamond with working surfaces depleted of catalyzing material
03/01/2005US6861098 Polycrystalline diamond partially depleted of catalyzing material
03/01/2005CA2360083C Valves for use in wells
03/01/2005CA2358896C Method and apparatus for formation isolation in a well
02/2005
02/28/2005CA2438640A1 Propellant treatment and continuous foam removal of well debris
02/24/2005WO2005017308A1 Drilling system and method
02/24/2005WO2005017307A1 Electrical treatment for oil based drilling or completion fluids
02/24/2005WO2004083590A3 Method and apparatus for drilling a borehole with a borehole liner
02/24/2005WO2002075104A8 Downhole tool
02/24/2005US20050042064 Tank having multiple screw-type transfer augers
02/23/2005EP1282757A4 Subsea riser disconnect and method
02/23/2005EP1169540B1 Arrangement in rock drilling apparatus
02/22/2005US6857486 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles
02/22/2005US6857485 Shale hydration inhibition agent and method of use
02/22/2005CA2338119C Method and apparatus for measuring fluid density and determining hole cleaning problems
02/22/2005CA2167491C Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing
02/17/2005WO2005014969A1 Apparatus and method for recovering used drilling fluid
02/17/2005WO2004022903A3 Top drive swivel apparatus and method
02/17/2005US20050037930 Drilling fluids, drilling fluids additives and methods useful for limiting tar sands accretion on metal surfaces
02/17/2005US20050037929 blend of carboxylic acid terminated polyamide and/or wetting agent with reaction product or mixture produced by Diels-Alder reaction of dienophiles, preferably carboxylic acids, acid anhydrides, with fatty acids and resin acids; emulsion stability
02/17/2005US20050037927 Drilling Fluids, Drilling Fluids Additives and Methods Useful for Limiting Tar Sands Accretion on Metal Surfaces
02/17/2005US20050034854 Underbalanced well completion
02/17/2005US20050034853 Top drive swivel apparatus and method
02/16/2005EP1401550B1 Process and arrangement for separating oil from oil containing materials
02/15/2005US6855261 Method for handling and disposing of drill cuttings
02/15/2005US6854953 Speed governor
02/15/2005US6854537 Portable placer exploration and sampling apparatus
02/15/2005US6854534 Two string drilling system using coil tubing
02/15/2005US6854533 Apparatus and method for drilling with casing
02/15/2005US6854532 Subsea wellbore drilling system for reducing bottom hole pressure
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