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 37 - Methods or apparatus for cleaning boreholes or wells
Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129)
12/2012
12/12/2012CN202596669U Oil pipe inner wall rotary cleaning device
12/12/2012CN202596654U Pumping well sliding sleeve type leakage-proof tool
12/12/2012CN202596590U Hollow oil pumping rod well-washing pipe rod column
12/12/2012CN102817586A Paraffin scraping device for pumping rod
12/12/2012CN102817585A Double-pipe circulating sand bailing device
12/12/2012CN102817566A Horizontal well sand bailing device
12/12/2012CN102814143A Instant mixing device
12/11/2012US8327942 Method and an apparatus for cold start of a subsea production system
12/06/2012US20120305234 Sucker Rod Cleaner
12/05/2012CN202578643U Automatic chemical feeding device of cluster well group oil pumping machine
12/05/2012CN202578642U Quantitative constant-flow continuous dosing anti-scaling and anti-separating device for a closed wellhead
12/05/2012CN202578641U Sucker rod cleaner of oil well
12/05/2012CN202578640U Mud scraping device for cable
12/05/2012CN202578639U Hot washing wax oil pipe convenient to disassemble and assemble
12/05/2012CN202578638U Mechanical descaling system for geothermal well
12/05/2012CN102808598A Washing machine of drill rod sleeve
12/04/2012US8322455 Manually driven surgical cutting and fastening instrument
12/04/2012US8322442 Well unloading package
11/2012
11/29/2012WO2012162593A2 Mineral separation using sized-, weight-or magnetic-based polymer bubbles or beads
11/29/2012US20120298369 Differential Pressure Wellbore Tool and Related Methods of Use
11/29/2012US20120298350 Well Cleaning Tool
11/29/2012CA2836308A1 Mineral separation using sized-, weight-or magnetic-based polymer bubbles or beads
11/28/2012EP2526255A2 Differential pressure wellbore tool and related methods of use
11/28/2012EP2526254A1 Wellbore knock-out chamber and related methods of use
11/28/2012EP2526252A1 Wellbore obstruction-clearing tool and method of use
11/28/2012CN202560192U Multi-medicament multi-wellhead remote automatic control chemicals feeding device
11/28/2012CN202560168U Hollow rod well flushing device for oil well
11/28/2012CN202560167U An oil recovery low-frequency pulse electromagnetic paraffin control device
11/28/2012CN202560166U Efficient cleaning machine for wax-stuffed oil tube
11/27/2012CA2713212C Method for treating oil and gas wells
11/27/2012CA2683272C Squeeze process for reactivation of well treatment fluids containing diatomaceous earth
11/27/2012CA2515901C Liquid carbon dioxide cleaning of wellbores and near-wellbore areas
11/27/2012CA2499525C Casing brush assembly
11/22/2012WO2012082463A4 Vacuum debris removal with articulated pickup and visual capability
11/21/2012CN202544814U Charging device
11/21/2012CN202544813U Automatic drill stem scraper
11/21/2012CN102791955A Differential pressure wellbore tool and related methods of use
11/21/2012CN102787828A Method for integrating segregated completion and acid cleaning inflated packing of horizontal well
11/21/2012CN102787827A Electromagnetic paraffin-inhibiting viscosity reducer
11/20/2012US8312930 Apparatus and method for water well cleaning
11/20/2012CA2499532C Casing scraper
11/19/2012CA2743742A1 Rod guide with wrapping vanes
11/16/2012CA2743805A1 Expandable mill and methods of use
11/15/2012US20120285743 Wellbore obstruction clearing tool and method of use
11/15/2012US20120285696 Cement Wiper Plug with Size Changing Feature
11/14/2012CN202531115U Waterpower pump for oil well
11/14/2012CN202531114U Chemical reagent injection device
11/14/2012CN202531113U Integrated skid for paraffin removal
11/14/2012CN202531112U Sucker rod oil wiper in oil well sleeve
11/14/2012CN202531111U Multi-functional polished rod oil scraper
11/14/2012CN202531038U Anti-paraffin and anti-abrasion sucker rod with strong magnetism
11/14/2012CN202527423U Multifunctional pipeline cleaning device
11/14/2012CN1977027B Process for disruption of filter cakes
11/14/2012CN102782247A Wellbore knock-out chamber and related methods of use
11/14/2012CN102777150A Gapless self-adapting scraper assembly
11/14/2012CN102775973A Scale removing agent applicable to alkaline-surfactant-polymer flooding and scale removing and unfreezing process
11/14/2012CN101769141B Localization hot washing device
11/08/2012WO2012151376A2 Chemical line flush systems
11/08/2012WO2012150864A1 Method and device for cleaning the upper portion of a well
11/08/2012US20120279716 Oil-Gas Well Structure for Facilitating Extracting a Downhole Filter String and Method for Extracting the String
11/07/2012EP2519608A1 Additive and method for removal of impurities formed due to sulfur compounds in crude oils containing calcium naphthenate
11/07/2012CN202520289U Anti-blocking bailing swab for oil field
11/07/2012CN102767348A Wax scraper of oil tube
11/01/2012WO2012146725A1 Downhole cleaning system
11/01/2012WO2012099668A3 Expanding mill having camming sleeve for extending cutting blade
11/01/2012WO2012091986A3 Process for the preparation of conformable materials for downhole screens
11/01/2012CA2834472A1 Downhole cleaning system
10/2012
10/31/2012EP2518263A1 Downhole cleaning system
10/31/2012EP2516793A1 Downhole tool for borehole cleaning or for moving fluid in a borehole
10/31/2012CN202510096U Liquid adding device for power supply free well
10/26/2012WO2012144277A1 Scale inhibition method and geothermal power generating device
10/26/2012WO2012142918A1 Pneumatic control system for dust collector
10/26/2012WO2012058143A3 Method and apparatus to remove deposits
10/24/2012CN202500548U Floating probe device for detecting wellhead flaw of drill tool
10/24/2012CN202500535U Oil pumping tubing string and oil pumping rod string with automatic paraffin removing apparatus
10/24/2012CN102753658A Additive and method for removal of impurities formed due to sulfur compounds in crude oils containing calcium naphthenate
10/24/2012CN102747985A Pneumatic control system of dust collector
10/24/2012CN102747984A Flowing well bipolar paraffin scraper and use method
10/11/2012WO2012088132A3 Surface signal for flow blockage for a subterranean debris collection apparatus
10/11/2012WO2012082463A3 Vacuum debris removal with articulated pickup and visual capability
10/11/2012US20120255724 Downhole tool for borehole cleaning or for moving fluid in a borehole
10/10/2012CN202483536U Preset working barrel of water injection well
10/10/2012CN202483518U Combined type sucker rod oil wiper
10/10/2012CN202483517U Sucker rod atomizing oil spraying device
10/10/2012CN202483516U Demulsification and paraffin removal device for oil well
10/10/2012CN202483515U Vacuum return bailing pump
10/10/2012CN202483514U Tubular column for positioning and hot-washing oil well
10/10/2012CN102720467A Residual acid flowback method after acid method hole-flushing in-situ leach of uranium
10/10/2012CN102720466A Special alloy wax-proofing tool
10/04/2012WO2012134265A1 A system for the solidification of hydrocarbon wax
10/03/2012CN202467782U Electromagnetic anti-wax oil production device
10/03/2012CN202467766U Polish rod oil wiper
10/03/2012CN202467765U Micro high pressure injection device
10/03/2012CN202467703U Limiting-type rotatable wax scraping centering device
10/03/2012CN102713129A Downhole device
10/03/2012CN102713091A Deep-well pump system
10/03/2012CN102704893A Method for cleaning and recovering wax oil of oil pipes, and special thermal washing wax oil removing pipes capable of being disassembled and assembled conveniently
10/03/2012CN102704866A Novel sucker rod centralizer
10/03/2012CN102703045A Multi-slug composite pressure decreasing and injection increasing agent for ultra-low permeability oil field
10/02/2012US8276668 Method and device for cleaning and sealing a well
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