| Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129) |
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| 08/08/2007 | CN2931775Y Highly effective pipeline scraper |
| 08/08/2007 | CN2931774Y Oil well paraffin prevention device connecting with oil pipe |
| 08/08/2007 | CN2931773Y Oil well paraffin prevention device connecting with pumping rod |
| 08/02/2007 | WO2007063022A3 Washing a cylindrical cavity |
| 08/02/2007 | US20070175635 Controlling inorganic scale of zinc sulfide or iron sulfide in a subterranean formation or wellbore, by pumping downhole a copolymer comprising a quaternary ammonium salt and an acrylamide unit; well completion; copolymer of acrylamide and diallyldimethylammonium salt and possibly acrylic acid or salt |
| 08/01/2007 | EP1529152B1 Subsea chemical injection unit for additive injection and monitoring system for oilfield operations |
| 08/01/2007 | CN2929171Y Chemical adder for oil well with pressure |
| 08/01/2007 | CN2929170Y Turbulence flow anti-paraffine tube |
| 08/01/2007 | CN2929169Y Anti-paraffin separator for petroleum production |
| 08/01/2007 | CN2929168Y Disc sheet type vortex oscillation reducing viscosity and anti-paraffin device of oil pumping rod |
| 08/01/2007 | CN2929157Y Wellhead compensator of hot liquid paraffin removing for oil well |
| 07/31/2007 | CA2535774A1 Storm water filter with debris sweep |
| 07/31/2007 | CA2227935C Improved method for the thermo-chemical dewaxing of large dimension lines |
| 07/26/2007 | US20070169938 Methods of controlled acidization in a wellbore |
| 07/25/2007 | CN2926490Y Self-jetting well paraffin scraper |
| 07/24/2007 | CA2388771C Surfactant compositions for well cleaning |
| 07/24/2007 | CA2288784C Monitoring of downhole parameters and tools utilizing fiber optics |
| 07/19/2007 | WO2007082207A1 Water absorbing polymers for treatment of brines and water-based drilling fluids |
| 07/19/2007 | WO2007081240A1 Method and device for treating bottom-hole zones of oil-and-gas-bearing formations |
| 07/19/2007 | US20070163779 Compositions containing a buffer and a peroxide or peracid useful for treating wells |
| 07/19/2007 | CA2636766A1 Method and device for treating bottom-hole zones of oil-and-gas-bearing formations |
| 07/17/2007 | US7243726 Enhancing a flow through a well pump |
| 07/12/2007 | WO2007077411A1 Wellbore intervention tool |
| 07/12/2007 | US20070158067 Scale Inhibitors Compatible with Sandstone Acidizing |
| 07/11/2007 | CN2921271Y Oil well active metal paraffin removal deplugging bar |
| 07/11/2007 | CN2921269Y Moving oil well crude oil paraffin removal unit |
| 07/11/2007 | CN1995692A Disk type eddy oscillating viscosity-reduction paraffin control device for use in sucker rod |
| 07/10/2007 | US7240733 Pressure-actuated perforation with automatic fluid circulation for immediate production and removal of debris |
| 07/05/2007 | US20070151736 Well tool protection system and method |
| 07/04/2007 | EP1697482B1 Oil-based drilling fluid comprising a non-polluting emulsifying system which can be used for any base oil and which is stable in respect of gas hydrates formation |
| 07/04/2007 | CN2918725Y Oil conduit short-circuiting hot washing apparatus |
| 07/03/2007 | CA2322484C Method for removal of cuttings from a deviated wellbore drilled with coiled tubing |
| 06/28/2007 | US20070144742 Method of generating stable foam for oil and gas well cleanouts |
| 06/28/2007 | CA2530729A1 Barrel debris trap |
| 06/27/2007 | CN2916107Y Oil-water well casing descaling milling wimble |
| 06/26/2007 | US7234524 Subsea chemical injection unit for additive injection and monitoring system for oilfield operations |
| 06/20/2007 | CN2913595Y New type vacuum superconductive heater |
| 06/20/2007 | CN2913594Y Microwave heating wax-proof device for oil well |
| 06/19/2007 | US7231976 Method of treating an oil or gas well with biodegradable low toxicity fluid system |
| 06/14/2007 | US20070131426 Junk removal tool |
| 06/12/2007 | CA2315669C Apparatus and method for cleaning debris from wells |
| 06/07/2007 | WO2007063022A2 Washing a cylindrical cavity |
| 06/07/2007 | US20070125537 membranes with selectivity between methane and the stimulant or fracturing gas ( N2 or CO2) are available; enables the gas under treatment to be processed to yield a fracturing-gas depleted stream that meets prescribed targets for composition or methane recovery; automatic monitoring and control means |
| 06/07/2007 | CA2632285A1 Washing a cylindrical cavity |
| 06/06/2007 | EP1792052A2 Integrated magnetic ranging tool |
| 06/06/2007 | CN1977089A Low dosage naphthenate inhibitors |
| 06/06/2007 | CN1977027A Process for disruption of filter cakes |
| 06/05/2007 | US7225878 Methods and apparatus for production of hydrocarbons |
| 06/05/2007 | CA2454312C Method and composition for cleaning and inhibiting solid, bitumin tar, and viscous fluid accretion in and on well equipment |
| 06/05/2007 | CA2401116C Sand removal and device retrieval tool |
| 05/31/2007 | US20070119593 Scale dissolver fluid |
| 05/30/2007 | CN2906058Y Sewage filtering well-cleanout device for water injection well |
| 05/30/2007 | CN2906050Y Self-adjusting type paraffin scraper for wellhead sucker rod |
| 05/30/2007 | CN1318727C Method for filling well aperture of subterranean terrane with gravel and gravel filling agent |
| 05/24/2007 | US20070114036 Silicate-Containing Additives for Well Bore Treatments and Associated Methods |
| 05/23/2007 | EP1787005A1 Magnetic assemblies for deposit prevention |
| 05/23/2007 | EP1689971B1 Method and system for injecting a treatment fluid into a well |
| 05/23/2007 | CN2903362Y Multifunctional centering guide, wax scraping, oil increasing device |
| 05/23/2007 | CN2903358Y Gaseous liquid balancing auto continuous chemicals adding apparatus |
| 05/22/2007 | US7219735 Immiscible with capping fluid; preventing pollution; kits |
| 05/22/2007 | US7219724 Downhole magnetic retrieval tool |
| 05/22/2007 | CA2401184C Improving reservoir communication with a wellbore |
| 05/16/2007 | CN2900773Y Well washing and wax removing machine for oil field |
| 05/15/2007 | US7216712 Treatment of oil wells |
| 05/15/2007 | CA2459646C Down hole well cleaning apparatus |
| 05/15/2007 | CA2182091C Method for removing alkaline earth metal scale |
| 05/09/2007 | EP1781898A1 Water flooding method |
| 05/09/2007 | EP1068426B8 Apparatus and method for stimulating a subterranean formation |
| 05/09/2007 | CN2898285Y Two-purpose equipment for cleaning pipe and pigging |
| 05/09/2007 | CA2530837A1 Helical rod guide and method |
| 05/08/2007 | US7213650 System and method for scale removal in oil and gas recovery operations |
| 05/08/2007 | US7213648 Pressure-actuated perforation with continuous removal of debris |
| 05/08/2007 | US7213642 Multi-fluid sparging |
| 05/03/2007 | US20070095539 Eccentrically-Disposed Choke Injector |
| 05/02/2007 | CN2895726Y Chemical feeder for oil-well protection |
| 05/02/2007 | CN2895725Y Expansion type oil reservoir protector |
| 04/25/2007 | CN2893220Y Efficient energy-saving rod oil-well pump capable of positive well flushing |
| 04/25/2007 | CN2893138Y Free rotary bailing swab with centralizer |
| 04/25/2007 | CN2893137Y Strong magnetic screen pipe |
| 04/25/2007 | CN1312378C Method for generating electric power in or near gas transportation duct and thermoacoustic electric power generator |
| 04/24/2007 | US7207389 Hybrid coiled tubing/fluid pumping unit |
| 04/24/2007 | CA2462472C Casing-engaging well tree isolation tool and method of use |
| 04/12/2007 | US20070079960 Well Treatment System and Method |
| 04/11/2007 | CN2888065Y Moveable electric-heating well-cleanout apparatus |
| 04/11/2007 | CN1309930C Method and compound for inhibiting plugging of conduits by gas hydrates |
| 04/10/2007 | US7201238 Low friction face sealed reaction turbine rotors |
| 04/10/2007 | US7201221 Wellbores utilizing fiber optic-based sensors and operating devices |
| 04/04/2007 | EP1769134A1 Scale inhibition method |
| 04/04/2007 | CN1308567C Fluid backward injection short joint |
| 04/03/2007 | US7198099 Method and system for injecting a treatment fluid into a well |
| 03/29/2007 | US20070071543 Object securing device |
| 03/29/2007 | US20070068670 Downhole tool |
| 03/28/2007 | EP1766184A1 Use of lithium salts of fatty alcohol sulphates for cleaning boreholes, boring devices and borings |
| 03/28/2007 | EP1766183A1 Enhancement modifiers for gas hydrate inhibitors |
| 03/28/2007 | CN2883670Y Multifunction high efficiency tubing inside calliper |
| 03/27/2007 | US7195068 Degrading a filter cake using a composition of an acid-soluble portion and a polymeric portion; introducing a delayed-release acid component of orthoesters or poly(orthoesters), and a delayed-release oxidizer component into a well bore; useful in unconsolidated or poorly consolidated formations |
| 03/22/2007 | US20070062698 Fluid with asphaltene control |
| 03/22/2007 | US20070062690 Packer washout assembly |
| 03/22/2007 | US20070062687 Flow tube exercising tool |
| 03/21/2007 | CN2881083Y Electromagnetic pulse chemical feeding device |