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)
01/2013
01/02/2013CN202645474U Application of double-O-ring seal structure in sealing side water feeder
01/02/2013CN102852475A Core drill with cuttings exhauster
01/02/2013CN102852474A Drilling anti-dust device
01/02/2013CN101451423B Drilling tool with dust collector
01/01/2013US8343894 Controlled variable density fluid for wellbore operations
12/2012
12/27/2012WO2012178041A2 Fluid migration shut-off
12/27/2012WO2012177460A2 Production system and method of varying restrictions to flow along the same
12/27/2012WO2012177331A1 Direct drive fluid pump for subsea mudlift pump drilling systems
12/27/2012WO2012175658A2 Tubular device with radiofrequency communication for well head
12/27/2012WO2012148578A3 Centrifugal subterranean debris collector
12/27/2012WO2012143851A3 Water treatment system
12/27/2012WO2012141880A3 Selectively variable flow restrictor for use in a subterranean well
12/27/2012WO2011151446A3 System and method for passing matter in a flow passage
12/27/2012US20120325557 Water/slurry containment device
12/27/2012US20120325469 Process and system for treating produced water and flowback water from oil and gas operations
12/26/2012EP2536916A2 A valve device for a side pocket or a sub in a well
12/26/2012CN202628061U Heating device with double hollow rods
12/26/2012CN202628045U Oil well filling sand prevention valve switch
12/26/2012CN202628002U Vacuum degasser
12/26/2012CN202628001U Air drill pore-forming and drilling dedusting equipment
12/26/2012CN102839935A Drilling fluid vibrating screen with anti-splash cover plate
12/26/2012CN102839934A Mud mixing system with performance parameter intelligent detecting function and detecting method
12/26/2012CN102839933A Dust cleaning device
12/26/2012CN102839914A Intermediate wind pressure high-speed rock drilling machine
12/26/2012CN101963049B Underground motor bypass valve
12/26/2012CN101498199B Controllable liquid injection pipe and controllable liquid injection method convenient for downhole and uplifting
12/25/2012US8338341 Process for the production of a granule of a coated oxidizing compound such granule and uses of the granule
12/20/2012WO2012173972A2 Managing treatment of subterranean zones
12/20/2012WO2012173852A2 Tubular valving system, body and method of opening
12/20/2012WO2011138580A3 Electric or natural gas fired small footprint fracturing fluid blending and pumping equipment
12/20/2012US20120318583 Cutting wash apparatus and method
12/20/2012CA2837175A1 Process for utilising waste drill cuttings in plastics
12/19/2012EP2535508A1 Downhole deployment valves
12/19/2012EP2535507A1 Downhole deployment valves
12/19/2012EP2535506A1 Downhole deployment valves
12/19/2012EP2535505A1 Downhole deployment valves
12/19/2012EP2535504A1 Downhole deployment valves
12/19/2012CN202611637U Well drilling spool
12/19/2012CN202611636U Environment-friendly barite powder adding device
12/19/2012CN202611635U Drilling rock debris and waste liquid separating device
12/19/2012CN202611634U Dust remover of pneumatic drilling machine
12/19/2012CN202611633U Geological logging rock debris automatic acquisition washing device
12/19/2012CN202611632U Cast-in-place drilled/punched pile construction plant with mud pit and mud separating device
12/19/2012CN202611631U Small sundries ground catching device for circulating flushing well
12/19/2012CN202611591U Three-dimensional waterpower vibrator for petroleum drilling
12/19/2012CN102834358A Compact wastewater concentrator and contaminant scrubber
12/19/2012CN102828732A Two-stage two-section separate-injection pipe column capable of back-flushing well and protected by insert seal sleeve and separate-injection method of two-stage two-section separate-injection pipe column
12/19/2012CN102828723A By-pass valve capable of memorizing working time for screw drill
12/19/2012CN102828712A Double-throttle control slurry pump distributing manifold for applying wellhead back pressure and method
12/19/2012CN102828711A Oil extraction circulation well drilling system
12/19/2012CN102828710A Coiled tubing cable penetrating check valve
12/19/2012CN102828709A Well-drilling safety intelligent monitoring method and well-drilling safety monitoring alarming device
12/19/2012CN102828708A Drilling fluid solid control system
12/19/2012CN102828707A Dustproof deslagging device of anchor drill
12/19/2012CN102828706A Slidable main unit base of continuous drilling fluid circulating system
12/19/2012CN102828690A Walking dual-swing downhole drill
12/19/2012CN102828689A Cable suspending type air partial reverse circulating motor mechanical core bit
12/19/2012CN102828496A Tool type pile foundation drilling platform based on HSE (Health, Safety and Environmental) management system
12/19/2012CN101906952B Auxiliary circulatory chip returning device of production of vertical well when the coalbed methane well generates radially hydraulical jet
12/19/2012CN101852070B Pressure balancing inclined plane locking-type gradually deblocking packer
12/19/2012CN101705798B Vortex sand washing device
12/18/2012US8333240 Reduced carbon footprint settable compositions for use in subterranean formations
12/18/2012CA2573526C Under-neutralized alkylxylene sulfonic acid composition for enhanced oil recovery processes
12/14/2012DE212010000211U1 Steuersystem und Schnittstelle für eine Tunnelvorrichtung Control system and interface for a tunnel device
12/13/2012WO2012170577A2 Method and apparatus for handling oil and gas well drilling fluids
12/13/2012WO2012149345A8 Drilling waste treatment
12/13/2012WO2012102620A3 Check valve
12/13/2012WO2011117576A3 Laminar phase ring for fluid transport applications
12/13/2012US20120312539 Apparatus and method for water well cleaning
12/12/2012EP2532829A2 Continuous flow drilling systems and methods
12/12/2012EP2532828A2 Continuous flow drilling systems and methods
12/12/2012CN202596676U Cluster well field closed oil test production device
12/12/2012CN202596623U Portable foam generator
12/12/2012CN202596622U Coiled tubing low-pressure acid-washing circulating valve
12/12/2012CN202596621U Novel slurry outlet flow detection meter
12/12/2012CN202596620U Novel floating ball type slurry outlet flow detection meter
12/12/2012CN202596619U Rectangular tank type measuring device of drilling fluid returning flow
12/12/2012CN202596618U Communicating pipe type drilling fluid return flow measuring device
12/12/2012CN202596617U Return flow rate measuring device of well repair circulating liquid
12/12/2012CN202596616U Mud centrifugal separation device
12/12/2012CN202596615U Mixed crystal containing device of rock debris-slurry in oil field
12/12/2012CN202596614U Well flushing device for further flushing well in water source heat pump system
12/12/2012CN202596613U Layer sealing sand flushing device
12/12/2012CN202596612U Reverse circulating continuous sand flushing reversing nipple
12/12/2012CN202596611U Automatic grouting control system in petroleum drilling pull-out-of-hole work
12/12/2012CN202596598U Drilling fluid filter circulation short section and drilling fluid filter circulation pipe string
12/12/2012CN102822445A Method for determining formation fluid control events in a borehole using a dynamic annular pressure control system
12/12/2012CN102817564A Fluid sand carrying experimental device
12/12/2012CN102080552B Underground double liquid grouting process and underground double liquid grouting machine thereof
12/12/2012CN102031935B Extendable combined drill rod with water passage, air passage and slurry returning passage
12/12/2012CN101942977B Continuous cyclic drilling device
12/12/2012CN101709629B Reverse circulation aerodynamic cavitation method for coalbed methane well and equipment
12/06/2012WO2012167170A2 Lubricated soil mixing systems and methods
12/06/2012WO2012166590A1 Proppant mixing and metering system
12/06/2012WO2012166400A2 Wellbore junction completion with fluid loss control
12/06/2012WO2011123438A8 Method for maintaining wellbore pressure
12/06/2012DE112011100555T5 Gelenkbefestigung für einen Vorabscheider A pivot mounting for a pre-separator
12/06/2012CA2837863A1 Lubricated soil mixing systems and methods
12/06/2012CA2837592A1 A method of conditioning a wall of a bore section
12/06/2012CA2836924A1 Wellbore junction completion with fluid loss control
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