| Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780) |
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| 02/05/2014 | CN103556940A Dual-channel porous turbulence pressure relief drilling tool for soft coal rock drilling, and construction method of drilling tool |
| 02/05/2014 | CN102330545B Oil well sand prevention method for heavy oil reservoir |
| 02/04/2014 | US8645069 Method for determining a steam dryness factor |
| 02/04/2014 | US8641899 Method and apparatus for removing metal cuttings from an oil well drilling mud stream |
| 02/03/2014 | DE202006021233U1 Mobile Flüssigkeitsfördervorrichtung für ein Werkzeuggerät Mobile liquid delivery device for a tool unit |
| 01/30/2014 | WO2014018686A1 Packaging of products the use of which generates dust production |
| 01/30/2014 | WO2014018310A2 Apparatus and method to test a property of a fluid |
| 01/29/2014 | EP2689095A2 System and method for controlling the pressure in a hydrocarbon well |
| 01/29/2014 | EP2414619B1 Apparatus for and method of drilling a subterranean borehole |
| 01/29/2014 | CN203412577U Lead screw clamp for tower type electric degasser |
| 01/29/2014 | CN203412547U Well-washing switch of packer |
| 01/29/2014 | CN203412535U Drilling fluid shunt device for starting or stopping pump through multiple steps |
| 01/29/2014 | CN203412534U Three-in-one mud cleaner |
| 01/29/2014 | CN203412533U Wet dust removal system for coal-mine gas pumping-exhaust drill hole |
| 01/29/2014 | CN203412532U Sand remover |
| 01/29/2014 | CN203412531U Bridge plug well washing pipe column |
| 01/29/2014 | CN203412530U Backwashing device for oil field |
| 01/29/2014 | CN203412529U Secondary bore cleaning device for bored pile |
| 01/29/2014 | CN103541676A Automatic control device of mud returning pipeline used for well drilling |
| 01/29/2014 | CN103541675A Well cementation flushing fluid evaluation device and method based on principle of identical shearing rate |
| 01/29/2014 | CN103541674A Hydraulic power pulse device |
| 01/29/2014 | CN103541673A Continuous sand flushing device |
| 01/29/2014 | CN102007264B Method and apparatus for programmable pressure drilling and programmable gradient drilling, and completion |
| 01/23/2014 | WO2013178295A9 Apparatus and method for controlling pressure in a borehole |
| 01/23/2014 | US20140021151 Offshore cargo rack for use in transferring palletized loads between a marine vessel and an offshore platform |
| 01/23/2014 | US20140021120 Shale shakers with selective series/parallel flow path conversion |
| 01/23/2014 | US20140021114 Drilling mud cleaning and recirculating system and vehicle formed therewith |
| 01/23/2014 | US20140020955 System, Method And Apparatus For Controlling Fluid Flow Through Drill String |
| 01/23/2014 | US20140020562 Wet Scrubber Having a Compact Demister that Requires Reduced Energy Demand |
| 01/22/2014 | CN203403848U Curing equipment test station for processing drilling fluid |
| 01/22/2014 | CN203403847U Mixing hopper for petroleum solid control mud |
| 01/22/2014 | CN203403846U Energy conservation and environmental protection well drilling three-stage solid control skid-mounted device |
| 01/22/2014 | CN203403845U Energy-saving and environmental-protection well drilling five-stage solid control skid-mounted device |
| 01/22/2014 | CN203403844U Energy conservation and environmental protection well drilling four-stage solid control skid-mounted device |
| 01/22/2014 | CN203403843U Device for fixing high-pressure water hose on tank opening |
| 01/22/2014 | CN203403842U Combined sand removal device for coalbed methane production |
| 01/22/2014 | CN203400788U Anti-falling and sealing structure for nozzle |
| 01/22/2014 | CN103534434A Submersible progressive cavity pump driver |
| 01/22/2014 | CN103527124A Unlimitedly-opened/closed by-pass valve and well drilling system |
| 01/22/2014 | CN103527123A Abandoned well drilling matter disposal system with abandoned well drilling matter not falling on ground during drilling |
| 01/22/2014 | CN103527122A Flushing system |
| 01/22/2014 | CN103527093A Jet-suction type reverse-circulation reamer for crossing of horizontal directional drilling |
| 01/22/2014 | CN103527092A In-hole jet-suction cuttings removing and reaming method for horizontal directional drilling |
| 01/22/2014 | CN103527078A Hole forming technology and device for bored pile construction through down-the-hole hammer |
| 01/22/2014 | CN102518393B Combined down-the-hole hammer |
| 01/21/2014 | CA2794331C Mechanical counter |
| 01/21/2014 | CA2620925C An apparatus and a method of fragmenting hard particles |
| 01/16/2014 | WO2014011968A1 Pump noise reduction and cancellation |
| 01/16/2014 | WO2014011812A2 Multi-cycle circulating tool |
| 01/16/2014 | WO2014011587A1 Breaker fluid |
| 01/16/2014 | WO2014011529A1 Improved flexibility of downhole fluid analyzer pump module |
| 01/16/2014 | WO2014011463A1 Drilling system with flow control valve |
| 01/16/2014 | WO2014008598A1 Drilling fluids with nano and granular particles and their use for wellbore strengthening |
| 01/16/2014 | WO2013104770A3 Nested dual drill pipe |
| 01/16/2014 | US20140014589 Method for cleaning drilling fluid in rock sampling drilling and a cleaning unit |
| 01/16/2014 | US20140014343 Systems and Methods for Managing Milling Debris |
| 01/16/2014 | DE112012001700T5 Elektrotauchpumpendruckmodul mit verbesserter Schmierung und Temperaturabführung Electric submersible pumps pressure module with improved lubrication and temperature dissipation |
| 01/16/2014 | CA2877369A1 Multi-cycle circulating tool |
| 01/15/2014 | EP2683910A2 Well treatment methods and systems |
| 01/15/2014 | EP2683909A2 Plug and pump system for routing pressurized fluid |
| 01/15/2014 | CN203394494U Coiled tubing fracturing and pressure conducting reverse circulation tool |
| 01/15/2014 | CN203394468U PE screen casing apparatus for well completion of horizontal coalbed gas well |
| 01/15/2014 | CN203394397U Underground multifunctional sand washing processor |
| 01/15/2014 | CN203394396U A device capable of automatically closing packer backwashing well |
| 01/15/2014 | CN203394395U Anti-backwash device for pore forming of down-the-hole drill under sand layer geological conditions |
| 01/15/2014 | CN203394394U Horizontal well sand washing and salvage integral tool |
| 01/15/2014 | CN203394393U Sand washing pen point |
| 01/15/2014 | CN103518032A Functionally gradient composite article |
| 01/15/2014 | CN103510893A Well drilling device and method for controlling bottom hole pressure by monitoring flow |
| 01/15/2014 | CN103510866A Roller-bit drill rig with double air outlet channels |
| 01/15/2014 | CN102278068B Method for treating formation water production in gas drilling process |
| 01/15/2014 | CN102168534B Special mining suction drill for coal mine |
| 01/14/2014 | US8627890 Rotating continuous flow sub |
| 01/09/2014 | WO2014008095A2 Method and system for measuring and calculating a modified equivalent circulating density (ecdm) in drilling operations |
| 01/09/2014 | WO2014007942A1 Pulsating rotational flow for use in well operations |
| 01/09/2014 | WO2014007804A1 Check valve for well stimulation |
| 01/09/2014 | WO2014007798A1 Pressure control in drilling operations with offset applied in response to predetermined conditions |
| 01/09/2014 | WO2014007797A1 Pressure control in drilling operations with choke position determined by cv curve |
| 01/09/2014 | WO2012140445A3 Subsea wellbore construction method and apparatus |
| 01/09/2014 | WO2012128872A3 Sonde with integral pressure sensor and method |
| 01/09/2014 | CA2877702A1 Pressure control in drilling operations with offset applied in response to predetermined conditions |
| 01/09/2014 | CA2877697A1 Pressure control in drilling operations with choke position determined by cv curve |
| 01/08/2014 | CN203383768U Drilling orifice dust catching device |
| 01/08/2014 | CN203383759U Decompression and manifold device for foam drilling |
| 01/08/2014 | CN203383758U Automatic dust collection cover for impact hammer |
| 01/08/2014 | CN203383757U Under-balanced self-starting grouting device |
| 01/08/2014 | CN103502563A Method of making and using a functionally gradient composite tool |
| 01/08/2014 | CN103502562A Device for measuring and controlling on-line viscosity at high pressure |
| 01/08/2014 | CN103498642A Rotation split type tensioning ring of marine riser |
| 01/08/2014 | CN103498641A Sand removing device and method of oil well negative-pressure machine |
| 01/08/2014 | CN103498639A Portable well head device and using method |
| 01/07/2014 | US8622135 Apparatus and methods for separating sand from well fracturing return water |
| 01/03/2014 | WO2014003998A1 Impedance spectroscopy measurement device and methods for analysis of live reservoir fluids and assessment of in-situ corrosion of multiple alloys |
| 01/03/2014 | WO2014003754A1 Well clean-up with subsea separator |
| 01/02/2014 | US20140000893 Set-Delayed Cement Compositions Comprising Pumice and Associated Methods |
| 01/02/2014 | US20140000889 Wireline flow through remediation tool |
| 01/01/2014 | CN203374228U Oil-water well head vapor cleaning apparatus |
| 01/01/2014 | CN203374227U Direct circulation hole-cleaning device |
| 01/01/2014 | CN203374207U Multifunctional casing running and grouting device for well drilling |
| 01/01/2014 | CN103492664A Well treatment methods and systems |