| Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129) |
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| 08/01/2013 | US20130192835 Method of reducing dust with self-assembly composites |
| 08/01/2013 | US20130192818 Devices, systems and methods relating to down hole operations |
| 07/31/2013 | CN203097829U Multifunctional oil well chemical feeding device |
| 07/31/2013 | CN203097828U Pressure balance movable joint device of oil pipe wax removing device |
| 07/31/2013 | CN203097827U Christmas tree production-continuous opening-detecting and wax-drawing-out device |
| 07/31/2013 | CN203097799U Inflatable oil-scraping self-sealing preventer |
| 07/31/2013 | CN203097794U Intelligent hydraulic type wellhead sealer |
| 07/31/2013 | CN203097749U Multi-effect sucker rod centralizing protector |
| 07/31/2013 | CN103225491A Technology for restraining gas cross flow via condensate gas reservoir salt precipitation |
| 07/31/2013 | CN103224776A Oil field flooding stratum protective agent and preparation method and application thereof |
| 07/31/2013 | CN103224775A Low-carbon mixed organic acid used for oil well plug removal, preparation method and application thereof |
| 07/31/2013 | CN102337111B Bio-enzyme blockage removal production promoter and application thereof |
| 07/30/2013 | CA2694151C Treatment fluids comprising clarified xanthan and associated methods |
| 07/25/2013 | WO2013109600A2 Methods and apparatuses for wiping subterranean casings |
| 07/25/2013 | US20130186632 Methods and apparatuses for wiping subterranean casings |
| 07/24/2013 | CN203081404U Oil field wax removing device |
| 07/24/2013 | CN203081403U Multistage immersible pump submerged in shaft bottom sediment and water mixture to clean deep shaft machine |
| 07/24/2013 | CN103221633A Artificial system for simultaneous production and maintenance with mechanical pumping with flexible pipe for fluid extraction |
| 07/24/2013 | CN103216214A Oil well chemical dosing device |
| 07/18/2013 | US20130180719 Method for autonomous control of a chemical injection system for oil and gas wells |
| 07/17/2013 | CN203066948U Flow monitor for dosing producing well |
| 07/17/2013 | CN203066932U Novel dedicated cleaning device for natural gas pipeline |
| 07/17/2013 | CN203066931U Steam paraffin removal equipment for hollow sucker rod |
| 07/17/2013 | CN103206192A Method for rapidly cleaning insoluble dirt in oil wells and oil reservoirs close to oil wells |
| 07/11/2013 | WO2013073997A3 Method for eliminating and preventing the formation of asphaltene and paraffin deposits in oil wells and pipelines, and apparatus for the implementation thereof |
| 07/11/2013 | US20130174408 Clamp |
| 07/10/2013 | CN203050632U Chemical agent injection device |
| 07/10/2013 | CN203050631U High-frequency and high-pressure heat-washing device |
| 07/10/2013 | CN203050630U Fluid amount increasing device for washing well |
| 07/10/2013 | CN203050557U Sucker rod self-rotation eccentric-wear-resistant oil-production-enhancing device |
| 07/10/2013 | CN203049585U Device for removing slurry on inner wall of steel protective drum of cast-in-situ bored pile |
| 07/10/2013 | CN103195393A Anti-pollution thermal washing and paraffin removal unit with dosage channel |
| 07/10/2013 | CN103195392A Anti-pollution thermal washing wax removing device |
| 07/09/2013 | US8479821 Method and apparatus for removal of pigs, deposits and other debris from pipelines and wellbores |
| 07/09/2013 | CA2592770C Floating head reaction turbine rotor with improved jet quality |
| 07/04/2013 | WO2012149104A3 Methods of establishing and/or maintaining flow of hydrocarbons during subsea operations |
| 07/03/2013 | CN203035163U Novel paraffin removal device for flowing well oil pipe |
| 07/03/2013 | CN203035162U Novel clingage removal device for water injection well oil pipe |
| 07/03/2013 | CN203035161U Combined type detection drift well gauge |
| 07/03/2013 | CN203035150U Coiled tubing self-styled blowout preventer |
| 07/03/2013 | CN103189595A Method and apparatus to remove deposits |
| 07/03/2013 | CN103189594A Hydrate deposit inhibition with surface-chemical combination |
| 07/03/2013 | CN103184852A Downhole cleaning device |
| 07/03/2013 | CN101963054B Underground synchronous developing and imaging device and use method thereof |
| 07/03/2013 | CN101802347B Method for managing hydrates in subsea production line |
| 06/27/2013 | WO2013096385A1 Apparatus and method to clean a tubular member |
| 06/27/2013 | WO2012115763A3 Method of introducing treatment agents into a well or flow conduit |
| 06/26/2013 | CN203022696U Self-balancing type doser for pumping wells |
| 06/26/2013 | CN203022695U Chemical feed tool for offshore oilfield production tubular column |
| 06/26/2013 | CN203022694U Electromagnetic compound paraffin removal device |
| 06/26/2013 | CN203022693U Electromagnetic and superconductive heating dewaxing device for hollow sucker rod of producing well |
| 06/26/2013 | CN102250603B Separated injection oil well composite blocking remover and injection method thereof |
| 06/25/2013 | US8469103 Plunger lift with chemical injection |
| 06/25/2013 | US8469100 Integrated fluid filtration and recirculation system and method |
| 06/25/2013 | CA2506991C Method and system for reservoir characterization in connection with drilling operations |
| 06/20/2013 | WO2013090347A1 Copolymers for use as paraffin behavior modifiers |
| 06/20/2013 | US20130153303 Apparatus and method to clean a tubular member |
| 06/20/2013 | US20130153245 Multi-purpose well servicing apparatus |
| 06/20/2013 | US20130153230 Mitigation of hydrates, paraffins and waxes in well tools |
| 06/20/2013 | CA2858089A1 Copolymers for use as paraffin behavior modifiers |
| 06/19/2013 | CN203008862U Oil extraction down-hole pump solid paraffin (dirty) prevention device |
| 06/19/2013 | CN203008861U Dirt-cleaning machine for tubular column of water injection well |
| 06/19/2013 | CN203008860U Sleeve paraffin removal device |
| 06/19/2013 | CN203008859U Paraffin prevention device for oil well |
| 06/19/2013 | CN101949285B Screen pipe completed well gel-breaking tester |
| 06/18/2013 | CA2617891C System for cyclic injection and production from a well |
| 06/13/2013 | US20130146295 Filter cake removal composition for drilling fluids and method of use thereof |
| 06/13/2013 | US20130146289 Two-stage filter cake removal composition for drilling fluids and method of use thereof |
| 06/12/2013 | CN202990974U Oil well chemical dosing device based on advanced RISC machine (ARM) |
| 06/12/2013 | CN202990973U Long-distance well opening self-control medicine adding system |
| 06/12/2013 | CN202990972U Multi-well-opening chemical dosing device of natural gas well |
| 06/12/2013 | CN202990971U Anchor teeth type hydraulic composite tube scraper |
| 06/12/2013 | CN202990970U Paraffin cleaning and centering anti-drop device for sucker rod |
| 06/12/2013 | CN202990969U Intelligent electromagnetic paraffin control device for oil well |
| 06/12/2013 | CN202986933U Gas circuit structure of gas well flushing-wax removal vehicle |
| 06/12/2013 | CN102093868B Microbial wax removal and control system and application thereof |
| 06/11/2013 | CA2663456C Method for controlled placement of additives in oil and gas production |
| 06/06/2013 | WO2013079572A1 A cleaning tool and a method for treating an inner surface of a casing |
| 06/06/2013 | WO2013036478A3 Disintegrative particles to release agglomeration agent for water shut-off downhole |
| 06/06/2013 | US20130140032 Rod guide and solids control assembly |
| 06/06/2013 | US20130140028 Wellbore cleaning apparatus and method |
| 06/06/2013 | CA2856162A1 A cleaning tool and a method for treating an inner surface of a casing |
| 06/05/2013 | EP2599953A1 An Improved Wellbore Cleaning Apparatus and Method |
| 06/05/2013 | CN202970662U Skid mounted oil well medicine adding device |
| 06/05/2013 | CN202970628U Horizontal well open-hole gravel packing tool |
| 06/05/2013 | CN202970627U Diameter-changeable scale-borer |
| 06/05/2013 | CN202970626U Oil well intelligent type electromagnetic paraffin-control and viscosity-reduction device |
| 06/05/2013 | CN202970625U Device for removing sealing fluid in process of taking rock core out of cylinder |
| 06/05/2013 | CN202970530U Well drilling borehole dredging device |
| 06/05/2013 | CN103132951A High-pressure well-mouth continuous feeding device |
| 06/05/2013 | CN103132950A Oil well paraffin prevention and scale prevention device |
| 06/05/2013 | CN103132949A Heater cable for tubing in shale type hydrocarbon production wells |
| 06/05/2013 | CA2769051A1 Sand check filter |
| 06/04/2013 | US8453740 System of pipes for use in oil wells |
| 06/01/2013 | CA2795945A1 An improved wellbore cleaning apparatus and method |
| 05/30/2013 | US20130133893 Debris removal system for downhole closure mechanism, and method thereof |
| 05/29/2013 | CN202954773U Twin-stage self-adaption flashboard blowout preventer |
| 05/23/2013 | WO2013073948A1 Equalized hydrostatic bailer |
| 05/23/2013 | CA2852510A1 Equalized hydrostatic bailer |
| 05/22/2013 | CN202946134U Guttation enclosed automatic control device of injection well |