| Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129) |
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| 06/01/2011 | CN201851055U Double-ejection wax-resistant and viscosity-break oil enhancing device |
| 05/31/2011 | US7950462 Scale inhibitors compatible with sandstone acidizing |
| 05/31/2011 | US7950459 Using a biphasic solution as a recyclable coiled tubing cleanout fluid |
| 05/31/2011 | US7950450 Apparatus and methods of cleaning and refinishing tubulars |
| 05/27/2011 | CA2686508A1 Process and process line for the preparation of hydraulic fracturing fluid |
| 05/26/2011 | WO2011062720A1 Piggable static mixer apparatus and system for generating a hydrate slurry |
| 05/26/2011 | WO2011062588A1 Method and apparatus for forming a borehole |
| 05/26/2011 | WO2011028448A3 Debris catcher with retention within screen |
| 05/26/2011 | CA2781468A1 Downhole circulation apparatus |
| 05/25/2011 | CN201843586U High-efficiency energy-saving electromagnetic paraffin cleaner |
| 05/25/2011 | CN201843585U IF electromagnetic heating device for removing wax |
| 05/25/2011 | CN102076928A Apparatus for cleaning boreholes within substrates |
| 05/19/2011 | US20110114323 Heat Generation Process for Treating Oilfield Deposits |
| 05/18/2011 | EP2321492A2 Drill string mounted rotatable tool and cleaning method |
| 05/18/2011 | EP2225438B1 Method for removing hydrate plug from a flowline |
| 05/18/2011 | CN201835793U Scraper for inner walls of oil tubes |
| 05/17/2011 | CA2566563C Low dosage naphthenate inhibitors |
| 05/12/2011 | US20110108278 Apparatus and method for stripping solids and fluids from a string used in drilling or servicing wells |
| 05/11/2011 | CN201826827U Modular underground three-phase separator |
| 05/11/2011 | CN201826811U Drifting scraping device |
| 05/04/2011 | CN201818298U Gel breaker tester for screen pipe well completion |
| 05/04/2011 | CN201818282U Oil wiper of sucker rod |
| 05/04/2011 | CN201818281U Descaling device for inner wall of oil pipeline |
| 05/04/2011 | CN201818280U Detachable intense magnetic anti-wax apparatus |
| 05/04/2011 | CN102041976A Method for removing and inhibiting wax by oil well air heating |
| 05/04/2011 | CN102040992A Rod blockage prevention liquid for carbon dioxide huff-puff enhanced oil recovery and injection method thereof |
| 05/03/2011 | US7935662 System, method, and apparatus for injection well clean-up operations |
| 05/03/2011 | US7934553 Method for controlling placement and flow at multiple gravel pack zones in a wellbore |
| 04/28/2011 | WO2010143000A3 Debris removal method and assembly |
| 04/28/2011 | US20110094747 Method of remediating bit balling using oxidizing agents |
| 04/27/2011 | CN201810274U Underground automatic dosing device |
| 04/27/2011 | CN201810265U Hollow rod well-cleaning check valve |
| 04/26/2011 | CA2566414C Improved flexible cup for downhole devices |
| 04/21/2011 | WO2011002943A3 Water treatment systems and methods |
| 04/20/2011 | EP2310621A2 Improved downhole tool |
| 04/20/2011 | CN201802357U Scale remover for underground oil pipe |
| 04/20/2011 | CN201799437U Electromagnetically-driving pitching device |
| 04/20/2011 | CN102027192A Method and apparatus for reducing deposits in petroleum pipes |
| 04/20/2011 | CN102022097A Oil field multifunction paraffin removal unit |
| 04/19/2011 | CA2502228C Self-destructing filter cake |
| 04/14/2011 | WO2011043872A2 Multi-point chemical injection system for intelligent completion |
| 04/13/2011 | CN201794525U Sucker rod trip operating device under pressure |
| 04/12/2011 | US7923416 Method of reducing the viscosity of hydrocarbon fluids |
| 04/12/2011 | CA2635300C Drilling fluid composition comprising hydrophobically associating polymers and methods of use thereof |
| 04/07/2011 | WO2011041572A1 Double string pump for hydrocarbon wells |
| 04/07/2011 | US20110079561 System and method for producing hot water without a flame |
| 04/07/2011 | DE102009018383B4 Vorrichtung zum Aktivieren oder Reinigen von Filterrohrbrunnen Means for activating or cleaning filter tube wells |
| 04/07/2011 | CA2775109A1 Double string pump for hydrocarbon wells |
| 04/06/2011 | EP2305948A1 A brush assembly |
| 04/06/2011 | CN201786328U Super oil well swab |
| 04/06/2011 | CN201786327U Packer rubber for high-sand oil well bailing pumping unit swab |
| 04/06/2011 | CN201786277U Apparatus for scrubbing and protecting underground oil extraction machine |
| 04/06/2011 | CN102003166A Gravity type oil well downhole continuous chemical adding device |
| 04/05/2011 | US7918281 Method of treating flow conduits and vessels with foamed composition |
| 03/31/2011 | WO2011036244A1 A brush assembly |
| 03/31/2011 | WO2010120453A3 Slickline conveyed tubular scraper system |
| 03/31/2011 | US20110073312 Debris protection for sliding sleeve |
| 03/30/2011 | CN201778811U Oil over-annulus logging top-and-bottom pulley oil-scraping counting four-functional device |
| 03/30/2011 | CN201778793U Underground drug adding device |
| 03/30/2011 | CN201778766U Hydraulic oil layer unblocking pump |
| 03/30/2011 | CN201778765U Gas mud remover for drill column |
| 03/30/2011 | CN201778764U Chain-transmission reciprocating descaling device for heat exchange tube bundle for oil field |
| 03/29/2011 | US7913763 Washing a cylindrical cavity |
| 03/24/2011 | WO2011035251A2 Open-hole mudcake cleanup |
| 03/24/2011 | WO2010135115A3 Dissolvable downhole tool, method of making and using |
| 03/24/2011 | WO2010123963A3 Utilizing electromagnetic radiation to activate filtercake breakers downhole |
| 03/24/2011 | US20110067877 Open-hole mudcake cleanup |
| 03/23/2011 | EP2297428A1 Method of remediating bit balling using oxidizing agents |
| 03/23/2011 | CN201771471U Vapor cleaning and paint repair device for oil-water well mouth |
| 03/23/2011 | CN201771469U Tool for oil well filling and backwashing |
| 03/22/2011 | CA2456834C Alkali metal tungstate compositions and uses thereof |
| 03/17/2011 | US20110061870 High density breaker fluids and methods of use thereof |
| 03/16/2011 | EP2295709A1 Downhole tool head for mounting onto a downhole tool for releasing of precipitated solids |
| 03/16/2011 | CN201763298U Special-purpose forcing cone for horizontal well sand washing |
| 03/15/2011 | US7906462 Mutual solvent system and method for improved oil and gas permeability in high temperature formations |
| 03/15/2011 | US7905291 Borehole cleaning using downhole pumps |
| 03/15/2011 | US7905285 Method and apparatus for perforating a casing and producing hydrocarbons |
| 03/15/2011 | CA2642242C Methods of cleaning sand control screens and gravel packs |
| 03/10/2011 | WO2011028448A2 Debris catcher with retention within screen |
| 03/10/2011 | US20110056694 Methods For Removing Paraffinic Hydrocarbon Or Bitumen In Oil Producing Or Disposal Wells |
| 03/10/2011 | CA2684689A1 Methods for removing paraffinic hydrocarbon or bitumen in oil producing or disposal wells |
| 03/09/2011 | CN201756949U Multifunctional scraping and washing device for pumping well |
| 03/09/2011 | CN201756948U Electric well flushing wax removal vehicle |
| 03/08/2011 | US7902124 Self-diverting acid treatment with formic-acid-free corrosion inhibitor |
| 03/03/2011 | WO2010151176A3 Method and device for eliminating paraffin and hydrate plugs in oil and gas wells |
| 03/03/2011 | WO2010135245A3 Intelligent debris removal tool |
| 03/03/2011 | WO2010132807A3 Packer retrieving mill with debris removal |
| 03/02/2011 | CN201753597U Cleaning reamer in oil pipe with scale in oil field |
| 03/01/2011 | US7897063 Composition for denaturing and breaking down friction-reducing polymer and for destroying other gas and oil well contaminants |
| 03/01/2011 | US7896080 Method of improving hydrocarbon production from a gravel packed oil and gas well |
| 02/24/2011 | WO2011020917A1 Downhole tool head for releasing precipitated solids |
| 02/24/2011 | US20110042089 Openhole perforating |
| 02/24/2011 | CA2768753A1 Downhole tool head for releasing precipitated solids |
| 02/23/2011 | EP2287441A2 Oil and gas field chemicals |
| 02/23/2011 | EP2286059A2 Downhole debris removal tool |
| 02/22/2011 | US7891419 Downhole well cleaning tool |
| 02/22/2011 | CA2468136C Thermoacoustic electric power generation |
| 02/22/2011 | CA2464936C Method of drilling a borehole with magnetic filter-cake removal |
| 02/17/2011 | WO2011018617A1 Downhole device |
| 02/17/2011 | WO2011018036A1 Pressure reducing system for fuel gas and natural gas dewaxing vehicle |