| Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129) |
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| 10/31/2013 | US20130284422 Integrated fluid filtration and recirculation system and method |
| 10/31/2013 | US20130284421 Sand control device cleaning system |
| 10/30/2013 | CN203257647U Oil well pump capable of realizing direct circulation well washing |
| 10/30/2013 | CN101718184B Foamed acid washing technological method for horizontal well |
| 10/29/2013 | US8567504 Composition and method relating to the prevention and remediation of surfactant gel damage |
| 10/29/2013 | US8567503 Composition and method relating to the prevention and remediation of surfactant gel damage |
| 10/23/2013 | CN203248121U Crude oil dirt-decomposition purification device |
| 10/23/2013 | CN203248120U Pressurized paraffin inhibitor adding device |
| 10/23/2013 | CN103362477A Oil field automatic feed descaling and paraffin removal device with blade assembly |
| 10/23/2013 | CN103362476A Casing type downhole heat exchanger heating system capable of preventing wall of producing well from paraffin precipitation |
| 10/16/2013 | CN203239307U Impulse type steam distributing tubular column |
| 10/16/2013 | CN203239291U Continuous chemical feeding device of high-pressure well mouth |
| 10/16/2013 | CN203239290U Intelligent oil well chemical dosing instrument |
| 10/16/2013 | CN203239289U Mud scraping device of spiral drill rod |
| 10/16/2013 | CN102134981B Paraffin cleaning shuttle |
| 10/16/2013 | CN101649729B Oil pipe connector and heat washing and paraffin removing system |
| 10/15/2013 | CA2559797C Paraffin inhibitors |
| 10/13/2013 | CA2775138A1 Hydrodynamic pulse tool |
| 10/10/2013 | US20130264060 Fluid suitable for treatment of carbonate formations containing a chelating agent |
| 10/09/2013 | CN203230400U Split type multifunctional dosing device for oil field |
| 10/09/2013 | CN203230399U Movable combined multifunctional dosing device for oil field |
| 10/09/2013 | CN203230388U Downhole liquid release device for oil and gas fields |
| 10/09/2013 | CN103343675A Compound plug removal technological method for offshore oil field injection well |
| 10/08/2013 | US8550165 Well servicing fluid |
| 10/08/2013 | US8550161 Shear-activated viscoelastic surfactant fluid and method |
| 10/08/2013 | CA2758493C Slickline conveyed tubular scraper system |
| 10/08/2013 | CA2530837C Helical rod guide and method |
| 10/02/2013 | EP2644822A2 Method for electromagnetic stimulation of downhole area during hydrocarbon production |
| 10/02/2013 | CN203223208U Anti-pollution hot wash paraffin removal device |
| 10/02/2013 | CN103334716A Composite tube scraper |
| 10/01/2013 | CA2728072C Apparatus for cleaning boreholes within substrates |
| 09/26/2013 | WO2012140432A3 Method and apparatus for cleaning fluid conduits |
| 09/26/2013 | US20130248186 Method for inhibiting scale formation in oil wells |
| 09/25/2013 | EP2642068A1 Artificial system for simultaneous production and maintenance with mechanical pumping with flexible pipe for fluid extraction |
| 09/25/2013 | CN203214011U Anti-falling oil extraction and paraffin prevention device |
| 09/25/2013 | CN203214010U Online-jetting scale removing and preventing device for oilfield four-in-one fire tube |
| 09/25/2013 | CN203214009U Electromagnetic paraffin control device based on single chip microprocessor |
| 09/25/2013 | CN203214008U Paraffin scraping device for flow strings |
| 09/25/2013 | CN203214007U Oil production paraffin control device with two component dual structure |
| 09/25/2013 | CN103328762A Fluid injection device |
| 09/24/2013 | CA2608292C Device and method for retrieving debris from a well |
| 09/18/2013 | CN203201534U Oil field heating power well flushing device |
| 09/18/2013 | CN203201533U Electric heating rod wax-removal and viscosity-reduction device for oil well |
| 09/18/2013 | CN103314178A Process for the preparation of conformable materials for downhole screens |
| 09/18/2013 | CN103306640A Fluid power paraffin removal device of rodless pump oil recovery system |
| 09/17/2013 | US8534359 Leach recovery of oil from oil sands and like host materials |
| 09/12/2013 | WO2013133719A1 A method for combined cleaning and plugging in a well and a flushing tool for flushing in a well |
| 09/11/2013 | EP2635384A1 Method and cleaning tool device |
| 09/11/2013 | CN203188974U Diameter-changing spiral spring for pumping well oil tube paraffin removal |
| 09/11/2013 | CN203188973U Pumping well energy-saving environment-friendly well repairing operating equipment |
| 09/11/2013 | CN103291250A Anti-stuck barrel oil pump |
| 09/11/2013 | CN103291245A Oil wellhead electromagnetic heating device |
| 09/11/2013 | CN103289662A Microbial powder for removing and inhibiting wax and application method thereof |
| 09/10/2013 | CA2707263C Breaker fluids and methods of using the same |
| 09/04/2013 | CN203175497U Oil well eccentric-wear-prevention centralizer pumping-assistance device |
| 09/04/2013 | CN203175492U Multi-magnetic-field strong-resonance automatic temperature adjusting type electromagnetic paraffin control and removal scale inhibition device |
| 09/04/2013 | CN203175491U Underground integrated three proofing tool |
| 09/04/2013 | CN203175490U Anti-paraffin and viscosity-reducing scale inhibition apparatus |
| 09/04/2013 | CN103275684A Oilfield hot-washing oil-base high-efficiency paraffin-removal paraffin inhibitor |
| 09/04/2013 | CN102182425B Suspended movable drill rod mud scraping device |
| 09/04/2013 | CN102027192B Method and apparatus for reducing deposits in petroleum pipes |
| 09/04/2013 | CN101864904B Operation device for stripping sucker rod at pressure |
| 09/03/2013 | US8522881 Thermal hydrate preventer |
| 09/03/2013 | US8522876 In situ extraction of hydrocarbons from hydrocarbon-containing materials |
| 08/29/2013 | WO2013126639A1 Hybrid aqueous-based suspensions for hydraulic fracturing operations |
| 08/29/2013 | WO2012115763A9 Method of introducing treatment agents into a well or flow conduit |
| 08/29/2013 | US20130225675 Bacterial control of water based fluids during subsurface injection and subsequent residence time in the subterranean formation |
| 08/29/2013 | US20130220618 Method and system for cleaning fracture ports |
| 08/29/2013 | US20130220607 Methods of using cellulose in various oilfield applications |
| 08/29/2013 | US20130220596 Wellbore cleaning method and apparatus |
| 08/28/2013 | EP2630326A2 Fluid injection device |
| 08/28/2013 | CN203161180U Agent adding vehicle for oil well |
| 08/28/2013 | CN203161179U Negative-pressure blockage remover for acidification, acid discharge and blockage removal |
| 08/28/2013 | CN203161178U Novel stepping paraffin scraper |
| 08/28/2013 | CN203161177U Hollow rod hot washing pipe wellhead equipment |
| 08/28/2013 | CN203161176U Oil well self-cleaning heat cleaning vehicle |
| 08/28/2013 | CA2769935A1 Method and system for cleaning fracture ports |
| 08/22/2013 | WO2013123040A2 Methods and systems for wiping surfaces when performing subterranean operations |
| 08/22/2013 | US20130213659 Breaker and displacement fluid |
| 08/22/2013 | US20130213658 Methods and systems for wiping surfaces when performing subterranean operations |
| 08/21/2013 | CN203145897U Multifunctional oil pump |
| 08/21/2013 | CN103256016A Automatic wire-feeding device for underground electric pulse work and automatic wire feeding method of same |
| 08/21/2013 | CN103256012A Multifunctional centralizing and oil increasing device |
| 08/20/2013 | US8511375 Wellbore cleaning devices |
| 08/19/2013 | WO2013105865A1 Method and device for removal of a hydrate plug |
| 08/19/2013 | CA2861318A1 Method and device for removal of a hydrate plug |
| 08/15/2013 | US20130210684 Method of removing water-based filter cake |
| 08/14/2013 | CN203130046U Agent adding device for oil well |
| 08/14/2013 | CN203130045U Independent well washing device for rod-pumped well |
| 08/14/2013 | CN203130044U Solar energy electromagnetic wax-proof viscosity-reducing device |
| 08/14/2013 | CN203130043U Electromagnetic paraffin-proof viscosity reduction device of field with variable frequency and variable intensity |
| 08/14/2013 | CN203129957U Drilling and scraping integrated well repair drill bit |
| 08/14/2013 | CN103244076A Single-chip microcomputer based electromagnetic paraffin control device |
| 08/13/2013 | US8505626 α-Amino acid phosphonic acid compounds, method of preparation of use thereof |
| 08/07/2013 | CN203114249U Skid-mounted maintaining device of water injection well |
| 08/07/2013 | CN203114248U Safe and environment-friendly wellhead paraffin removing and recycling apparatus |
| 08/07/2013 | CN203114247U Strong magnetic rotational flow self-generating electricity vacuum superconducting four-effect paraffin control and viscosity reduction device |
| 08/07/2013 | CN103233701A Reduction spiral spring for tubing paraffin removal of pumping well |
| 08/07/2013 | CN101711273B Well service compositions for consolidation of particulates in subterranean coal seams |
| 08/06/2013 | CA2702593C Method, apparatus, and magnet for magnetically treating fluids |