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)
05/2014
05/01/2014WO2013127609A3 Actuator for dual drill string valve and drill string valve configurations therefor
05/01/2014WO2013116381A3 Dual gradient managed pressure drilling
04/2014
04/30/2014EP2723970A2 Tubular device with radiofrequency communication for well head
04/30/2014EP2723969A2 A fluid diverter system for a drilling facility.
04/30/2014EP2723968A1 Direct drive fluid pump for subsea mudlift pump drilling systems
04/30/2014CN203570236U Choke manifold control device for oil producing well
04/30/2014CN203570235U Twin-stage degritting sand-washing liquid handling truck
04/30/2014CN203570234U Hollow sleeve seal type orifice dust extractor and hollow sleeve seal device thereof
04/30/2014CN203570233U Dust collection cover and dust collection device using same
04/30/2014CN203570232U Oil production well flushing device
04/30/2014CN203570231U Sinking pump deep hole slag removing device
04/30/2014CN203570230U Pile bottom sediment cleaning system
04/30/2014CN203570196U Slurry pumping type well sinking device
04/30/2014CN203565335U Wear-proof vibrating sieve plate
04/30/2014CN103764944A A method of conditioning a wall of a bore section
04/30/2014CN103764939A Downhole fluid flow control system having a fluidic module with a bridge network and method for use of same
04/30/2014CN103758474A Process for recycling oil base mud from oil base mud well drilling waste
04/30/2014CN103758454A Pore forming, pit building, powder stamping and pressure relief integrated device in soft coal development area
04/30/2014CN102477846B Soil-layer broaching bit
04/29/2014US8708065 Vessel to condition dry drill cuttings
04/29/2014US8708043 Methods and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing
04/24/2014WO2014062626A1 Method and apparatus for testing lost circulation materials within a permeability plugging apparatus
04/24/2014WO2014062485A1 Drilling tool system and method of manufacture
04/24/2014WO2014060759A2 Apparatus for continuous circulation drilling of a wellbore
04/24/2014WO2013188124A9 Methods for predicting dynamic sag using viscometer/rheometer data
04/24/2014US20140110358 Enhanced system for sand cleaning in a hydrocyclone
04/24/2014US20140110169 Method and system for identifying a self-sustained influx of formation fluids into a wellbore
04/23/2014EP2721248A2 Process for utilising waste drill cuttings in plastics
04/23/2014CN203561230U Drilling mud forced cooling device
04/23/2014CN203559830U Solid filling device for gas drilling
04/23/2014CN203559829U Liquid feeding mechanism of four-phase separator for drilling
04/23/2014CN203559828U Separated skid-mounted device of four-phase separator
04/23/2014CN203559827U Splash-proof device for drilling fluid vibrating screen
04/23/2014CN203559826U Gas agitator capable of preventing slurry from precipitating in drilling pile shaft
04/23/2014CN203559825U Horizontal well rotational flow sand removal device
04/23/2014CN103748313A Drilling waste treatment
04/23/2014CN103742108A Downhole operation well fluid balance buffering method and multifunctional buffering fluid valve
04/23/2014CN103742088A Double spring support pull type automatic filling valve float valve
04/23/2014CN103742080A Composite driving drive rod
04/22/2014US8703658 Drilling fluid and methods
04/22/2014CA2789289C Oil well drilling fluids, oil well cement composition and slurry of weighting material
04/22/2014CA2722719C Fill up and circulation tool and mudsaver valve
04/22/2014CA2621041C Enclosed circulation tool for a well
04/17/2014WO2014058778A1 System for downhole and surface multiphase pumping and methods of operation
04/17/2014WO2013154420A3 Apparatus and method to remotely control fluid flow in tubular strings and wellbore annulus
04/17/2014WO2013123141A3 Systems and methods for managing pressure in a wellbore
04/17/2014WO2013079929A3 Apparatus and method for controlling a downhole device
04/17/2014WO2013043489A3 Permeable lost circulation drilling liner
04/17/2014US20140102805 Direct Drive Fluid Pump for Subsea Mudlift Pump Drilling Systems
04/17/2014US20140102802 Center discharge gas turbodrill
04/17/2014US20140102789 Dual gradient drilling system
04/17/2014US20140102699 Defoaming Agent Compositions and Methods of Making and Using Same
04/16/2014CN203547636U Drill rod sealing device, mining dust catching device and mining drilling device
04/16/2014CN203547609U Single-flow type PDM drill by-pass valve
04/16/2014CN203547608U Waste drilling fluid treatment device
04/16/2014CN203547607U Treating device for waste drilling fluid in oil field
04/16/2014CN203547606U Drilling fluid degasser outlet flow monitoring device and drilling fluid degasser
04/16/2014CN203547605U Dustproof protective cover of drilling machine
04/16/2014CN203547604U Rock debris filter device
04/16/2014CN203547603U Anchoring agent protection crushing plant used for anchor cable
04/16/2014CN203547530U Coaxial double-deceleration forward and reverse two-way output spiral rock-entering drilling machine
04/16/2014CN203546894U Flushing well
04/16/2014CN103726802A Deslagging device and rotary drilling rig
04/16/2014CN103726801A Deslagging device and rotary drilling rig
04/16/2014CN103725271A Collapse resistant and high temperature resistant leakproof organic fluosilicic drilling fluid with strong inhibitive ability
04/16/2014CN103725265A Compound viscosity reducer and viscosity reducing process applicable to bentonite solution
04/15/2014CA2725717C Apparatus and methods for drilling a wellbore using casing
04/10/2014WO2014055192A1 Multi-cycle ball activated circulation tool with flow blocking capability
04/10/2014WO2014055074A1 Downhole flow control using perforator and membrane
04/10/2014WO2013043911A3 Three-way flow sub for continuous circulation
04/09/2014EP2715044A1 Proppant mixing and metering system
04/09/2014EP2715043A2 Lubricated soil mixing systems and methods
04/09/2014EP2715039A2 Wellbore junction completion with fluid loss control
04/09/2014CN203531812U Down-hole diverter for deep drilling
04/09/2014CN203531811U Storing and stirring integrated mud sand mulling device
04/09/2014CN203531810U Drilling fluid vibrating screen
04/09/2014CN203531809U High pressure airflow sand adding device
04/09/2014CN203531808U Sand removal and separation device for sand-carrying airflow
04/09/2014CN203531807U Protecting bush type drill rod filter
04/09/2014CN203531771U Continuous air drilling circulation nipple
04/09/2014CN203531748U Dedusting rotary drill rig
04/09/2014CN103711454A Filling process applied to petroleum drilling well
04/09/2014CN103711449A Device for removing rock debris in hole through waterpower
04/09/2014CN102834358B Compact wastewater concentrator and contaminant scrubber
04/09/2014CA2829890A1 Auger tank apparatus for wellbore cuttings
04/08/2014US8691731 Heat generation process for treating oilfield deposits
04/08/2014US8689906 Methods and apparatus for reducing stick-slip
04/08/2014US8689874 Visco-elastic surfactant spacers
04/08/2014CA2734351C High rate stimulation method for deep, large bore completions
04/08/2014CA2708799C Gas trap for drilling mud having quick-release separable lower section
04/03/2014WO2014052400A1 Triggerable lost circulation material and method of use
04/03/2014WO2014049369A2 Drilling method for drilling a subterranean borehole
04/03/2014WO2014022320A3 Monitoring, diagnosing and optimizing gas lift operations
04/03/2014WO2013150280A3 Downhole actuator
04/03/2014US20140091028 Systems and Methods for Drying Drill Cuttings
04/03/2014US20140090888 Apparatus, System, and Method for Controlling the Flow of Drilling Fluid in a Wellbore
04/02/2014CN203516069U Discharging pipeline device of three-cylinder plunger pump
04/02/2014CN203515403U Sand washing device capable of converting inverse well-flushing into conventional well-flushing
04/02/2014CN203515402U Continuous circulating short piece applicable to oil and gas drilling
04/02/2014CN203515401U Piston type stand pipe pressure transmitter
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