Patents for E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129)
03/2007
03/15/2007US20070056773 Downhole impeller device
03/15/2007US20070056738 Stimulation and injection system
03/14/2007CN1928320A Cleaning wax apparatus
03/14/2007CN1928318A Stainless steel seepage scale removal blowdown backwash fine filter for flooding well
03/13/2007US7188676 Pumping into the well a composition to dissolve oil and dispersing solids, inhibiting the formation of solid, improve the permeability; containing dispersants, pH adjusting agent, solvents, salts; subterranean oil well
03/07/2007CN2876322Y Jet beat washing wax removing chemical adding multi purpose car
03/06/2007US7185704 Service tool with flow diverter and associated method
03/01/2007WO2007003894A3 Wellbore cleaning method and apparatus
03/01/2007WO2005086799A3 Multi-fluid sparging
02/2007
02/28/2007CN2874017Y Paraffin cleaning stick for oil well
02/28/2007CN2874016Y Paraffin scrapper
02/28/2007CN2874009Y Up-and-down wall scraper
02/28/2007CN1920247A Magneto-thermo wax-proofing apparatus for oil exploitation
02/27/2007US7182138 Reservoir communication by creating a local underbalance and using treatment fluid
02/22/2007US20070039739 Well chemical treatment utilizing plunger lift delivery system with chemically improved plunger seal
02/22/2007US20070039737 Dual function cleaning tool
02/21/2007CN2871804Y Stabilizer of high-magnetic waxproofing oil-pumping unit
02/21/2007CN2871803Y Stabilizer of strong-magnetic waxproofing oil-pumping unit
02/21/2007CN2871797Y Sucker rod of positioning rotary wax scraping stabilizer
02/20/2007US7178593 Piggable separation system and method
02/20/2007US7178588 Flexible cup for downhole devices
02/15/2007WO2007017353A1 System for cyclic injection and production from a well
02/15/2007WO2006085791A3 Method for heating an oil-producing well with the aid of a deep-well pump, a device for carrying out said method and a deep-well pump (variants) for said device
02/15/2007US20070034369 Controlling transient pressure conditions in a wellbore
02/15/2007CA2617891A1 System for cyclic injection and production from a well
02/14/2007EP1750930A1 Downhole ultrasonic well cleaning device
02/14/2007CN2869307Y Antisluding device
02/14/2007CN2869306Y Differential pressure self-sealing composite heat flushing protector
02/13/2007US7177016 Electronic surveying apparatus
02/13/2007US7174958 Drill string member
02/08/2007US20070029086 Methods of forming packs in a plurality of perforations in a casing of a wellbore
02/08/2007CA2614868A1 Scale inhibiting well treatment
02/07/2007EP1749142A2 Filter cake degradation compositions and associated methods
02/06/2007US7172026 Apparatus to allow a coiled tubing tractor to traverse a horizontal wellbore
01/2007
01/31/2007CN2864074Y Two-side wax scraping centralizer
01/30/2007US7168494 Dissolvable downhole tools
01/25/2007WO2007011475A1 Middle phase micro emulsions and process of making and using the same
01/25/2007WO2006010124A3 Fluid conditioning system and method
01/25/2007US20070017679 Downhole multi-action jetting tool
01/24/2007CN2861453Y Wall-cleaning machine of tubing inner wall
01/24/2007CN2860932Y Self-cycle well cleanup vehicle for oil field water injection well
01/24/2007CN1902376A Dissolving filter cake
01/23/2007CA2472105C Apparatus and method for cleaning and sealing a well borehole portion for formation evaluation
01/23/2007CA2193923C Method of oil/gas stimulation
01/18/2007US20070012451 Piggable flowline-riser system
01/17/2007CN2858939Y General paraffin scraper of oil well
01/17/2007CN1896455A Mud-scraping ring and scraper for drilling-rod external wall
01/16/2007CA2347957C Method and composition for sweep of cuttings beds in a deviated borehole
01/11/2007WO2007004886A1 Device and method for cleaning a compressor
01/11/2007WO2007003894A2 Wellbore cleaning method and apparatus
01/11/2007CA2612092A1 Wellbore cleaning method and apparatus
01/10/2007EP1740671A1 Inhibitive water-based drilling fluid system and method for drilling sands and other water-sensitive formations
01/09/2007US7159675 Method of drilling a borehole into an earth formation
01/09/2007US7159658 well completion using mixtures of water, viscosity increasing polymers and water soluble strongly delayed polymer breakers comprising chelating agents, peroxide and iron source; removal of filter cakes
01/09/2007US7159655 pumping well completion fluids comprising cationic polymers and brines, used as antiscaling agents
01/06/2007CA2552073A1 Rod for a well string
01/03/2007EP1556458B1 Self-destructing filter cake
01/03/2007CN1890453A Method and system for injecting a treatment fluid into a well
01/02/2007US7156177 For dissolving scale (e.g barite and calcite) in a subterranean hydrocarbon-bearing formation; has a surfactant for reducing the viscosity of the fluid
12/2006
12/27/2006CN1884791A Permanent magnetic casing type adhesion reducing and wax preventing device for down-hole oil production
12/26/2006US7152697 Stabilizing with amine surfactant primarily in unprotonated form; charging with such as ethylene diamine tetraacetic acid
12/21/2006US20060283599 Methods for remediating subterranean formations
12/20/2006CN2849151Y Oil well puraffin preventer
12/20/2006CN2848845Y Plugging type rare earth permanent magnet wax preventing scale remover
12/20/2006CN1882759A Method for providing a temporary barrier in a flow pathway
12/14/2006US20060278395 Flow reversing apparatus and methods of use
12/12/2006CA2216430C Hydrocarbon production using multilateral well bores
12/07/2006US20060272809 Wellbores utilizing fiber optic-based sensors and operating devices
12/06/2006CN2844425Y Solid waxproofing equipment under pump of oil well
12/06/2006CN1288327C Composite for stratum treatment and method thereof
12/05/2006US7143829 Downhole tool
12/05/2006US7143827 Placing a spacer fluid between first and second fluids to separate first and second fluids and to remove first fluid from the walls of well bore, displacing first fluid and spacer fluid from well bore with second fluid
11/2006
11/29/2006EP1266123B1 Subsea production system
11/28/2006US7140438 Orthoester compositions and methods of use in subterranean applications
11/23/2006WO2006123109A1 Device and method for retrieving debris from a well
11/23/2006CA2608292A1 Device and method for retrieving debris from a well
11/21/2006US7137449 Magnet arrangement and method for use on a downhole tool
11/21/2006CA2345305C Acidic surfactant composition and method for cleaning wellbore and flowline surfaces using the surfactant composition
11/16/2006WO2006121699A2 Flow through subassembly for a downhole drill string and method for making same
11/16/2006WO2006120453A1 Wellbore cleaning tool and method
11/16/2006US20060254770 Method and composition for cleaning a well bore prior to cementing
11/16/2006CA2606899A1 Flow through subassembly for a downhole drill string and method for making same
11/16/2006CA2606782A1 Wellbore cleaning tool and method
11/15/2006EP1720954A1 Drilling fluids with improved shale inhibition and methods of drilling in subterranean formations
11/14/2006US7135440 Method for controlled placement of oilfield chemicals and composition useful for practicing same
11/14/2006US7134496 Reducing or removing wellbore skin damage, invert emulsion drilling fluid and filter cake deposition during and after oil well drilling
11/14/2006US7134494 Method and system for recirculating fluid in a well system
11/14/2006CA2307227C Method and apparatus for the removal of sand in an underwater well
11/14/2006CA2300683C Coiled tubing drilling with supercritical carbon dioxide
11/07/2006US7131495 adding chlorates or stable chlorine dioxide and water into one tank; in another tank adding acidic substances, which can be dissolved in water and produce hydrogen ion in an aqueous solution; providing a high pressure injection pump
11/01/2006CN2833100Y Paraffin cleaner for ground oil pipe
10/2006
10/31/2006CA2270218C Heavy oils with improved properties and an additive for the same
10/25/2006EP1713568A1 Use of polyaminothylenephosphonates as dispersing agents
10/24/2006US7124822 introducing a completion fluid: water; lts selected from ammonium chloride, sodium chloride/bromide/formate, potassium chloride/formate, calcium chloride/bromide, zinc bromide, and cesium formate; oxygen or nitrogen gas; capryl/capramidopropylbetaine surfactant foaming agent to a subterranean zone
10/24/2006CA2508339C Drilling fluid and methods of use thereof
10/19/2006WO2006109008A1 Apparatus for removing debris in a wellbore
10/18/2006EP1339937A4 Improved method for stimulation of liquid flow in a well
10/18/2006CN2828308Y Sucker rod oil wiper
10/17/2006US7121343 Selectively operational cleaning tool
10/17/2006US7121336 Well scrubber
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