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 33 - Sealing or packing boreholes or wells
Patents for E21B 33 - Sealing or packing boreholes or wells (33,564)
09/2008
09/03/2008EP1963613A1 Plug retrieval and debris removal tool
09/03/2008EP1963612A2 Apparatus for gripping a tubular on a drilling rig
09/03/2008EP1238234B1 Ground energy transfer system and method
09/03/2008CN201110173Y Bowling type step-by-step water-searching technique tubular pile
09/03/2008CN201110159Y Tool for ir-drill bung half-distance cementing
09/03/2008CN201110158Y Automatic slurry-distributing heavy system
09/03/2008CN201110157Y Casing tube sealer
09/03/2008CN201110156Y Multifunctional well head sealer
09/03/2008CN201110155Y Well head receding machine
09/03/2008CN201110154Y Oil production, gas well mouth apparatus
09/03/2008CN201110153Y Machine for blowout prevention of non casing thread oil water well head
09/03/2008CN201110152Y Lower hollow bar operation blowout preventer
09/03/2008CN201110151Y Novel well head sealing device
09/03/2008CN201110150Y Central tube type double-tube thermal-picking cellar connection
09/03/2008CN201110149Y Picking-infusion-measurement multifunctional cellar connection
09/03/2008CN201110148Y Novel steam drive cellar connection
09/03/2008CN101255785A Skidproof well cementing rubber plug
09/03/2008CN101255784A Method for sealing packer outside pipe with cement paste to auxiliary cement well
09/02/2008CA2545376C Compressible darts and methods for using these darts in subterranean wells
09/02/2008CA2542633C Packer with foldback rings
09/02/2008CA2506583C Two-part telescopic tensioner for risers at a floating installation for oil and gas production
09/02/2008CA2494283C Tensioning system for production tubing in a riser at a floating installation for hydrocarbon production
08/2008
08/28/2008US20080202771 Subterranean Well Tool Including a Locking Seal Healing System
08/28/2008US20080202753 Method and apparatus for expanding and separating tubulars in a wellbore
08/28/2008US20080202752 Low density, high yield cement slurry formulation and method of using the same
08/28/2008US20080202751 Methods and Devices for Forming a Wellbore with Casing
08/27/2008EP1339938B1 Boring apparatus
08/27/2008CN201106435Y Separate-layer fracturing slide bushing type packer
08/27/2008CN201106434Y Self-checking packer
08/27/2008CN201106433Y Hanger type thermal-picking casing head of casing
08/27/2008CN201106432Y Wear prevention sleeve of casing head as well as special sending, taking-up tool
08/27/2008CN201106431Y High temperature no-killing well working equipment
08/27/2008CN201106430Y Oil well cable sealer
08/27/2008CN201106428Y Hydraulic machinery double-acting intumescence type tailpiece hanger
08/27/2008CN201106427Y Rotatable hydraulic machinery double-acting intumescence type tailpiece hanger
08/27/2008CN201106426Y Rotatable hydraulic machinery double-acting intumescence type tailpiece hanger
08/27/2008CN201106425Y Hydraulic machinery double-acting intumescence type tailpiece hanger
08/27/2008CN201106424Y Machine for rapidly feeding eenter pipe rubber plug
08/27/2008CN201106412Y Well mouth casing head
08/27/2008CN201106410Y Ir-kill-job perforating blow-in rotating-laying integrated tubular pile
08/27/2008CN101253307A Control system for seabed processing system
08/27/2008CN101250996A Oil-gas field multi-well short distance concatenation gas collection technique
08/27/2008CN101250995A Middle-low pressure gas collection technique
08/27/2008CN101250989A Surface drilling down-hole sealing technique without unpackaging condition
08/27/2008CN101250988A Technique for increasing seat envelop rated tonnage of packer
08/27/2008CN101250987A Method for testing and dislodging oil well intelligent delamination
08/27/2008CA2622052A1 Subterranean well tool including a locking seal healing system
08/26/2008US7417011 modifying the permeability to water of a subterranean formation comprising injecting into the formation aqueous alkyl or an alkylene oxide branched polyhydroxyetheramine or a salts
08/26/2008US7416770 Reinforcement ring
08/26/2008US7416226 Spring-biased pin connection system
08/26/2008US7416022 In-situ method of producing oil shale, on-shore and off-shore
08/26/2008US7416021 Armored stripper rubber
08/26/2008US7416020 Wellhead isolation tool, wellhead assembly incorporating the same, and method of fracturing a well
08/26/2008CA2570526C Degradable additive for viscoelastic surfactant based fluid system
08/26/2008CA2547007C Swelling layer inflatable
08/26/2008CA2490455C Reciprocating slickline pump
08/26/2008CA2470435C A pressure control system for a wet connect/disconnect hydraulic control line connector
08/26/2008CA2369411C Method and system for controlling well bore pressure
08/26/2008CA2330870C Subterranean well tool and slip assembly
08/21/2008WO2008100964A1 Apparatus and methods of flow testing formation zones
08/21/2008WO2008100810A2 Silicate-based wellbore fluid and methods for stabilizing unconsolidated formations
08/21/2008WO2008100176A1 Method for developing hydrocarbon accumulations
08/21/2008WO2008099161A1 Systems for actuating a downhole tool
08/21/2008WO2008098380A1 Method and apparatus for fluid migration profiling
08/21/2008US20080197605 Method for Constructing and Treating Subterranean Formations
08/21/2008US20080197306 Ram bop position sensor
08/21/2008US20080196904 Wireline entry sub
08/21/2008US20080196897 Methods of completing wells for controlling water and particulate production
08/21/2008US20080196889 Reverse Circulation Cementing Valve
08/21/2008US20080196888 Ram bop position sensor
08/21/2008US20080196885 Shaft Plugging System
08/21/2008US20080196884 Expandable Packer with Mounted Exterior Slips and Seal
08/21/2008CA2799564A1 Apparatus and methods of flow testing formation zones
08/21/2008CA2677478A1 Apparatus and methods of flow testing formation zones
08/20/2008EP1957749A1 Plug intended to be inserted into a duct on which a fluid flows and associated fluid prospecting well
08/20/2008EP1844211B1 Ram automatic locking system for a blowout preventer
08/20/2008EP1518037B1 Methods of sealing expandable pipe in well bores
08/20/2008CN201103391Y Hydraulic pressure test pressurizing pump of well control device
08/20/2008CN201103390Y Experiment detecting system for well control device
08/20/2008CN201103376Y Self-compensation sand-filling machine for oil water well
08/20/2008CN201103375Y Bidirectional sealing wedge type packer
08/20/2008CN201103374Y Plugged tube sealing device
08/20/2008CN201103373Y Oil pipe plugging device for oil-gas field
08/20/2008CN201103372Y Sucker-rod pumping well completion tubular pile plugging device for oil well operation under pressure
08/20/2008CN201103371Y Manual double-gate sucker rod blow-out preventer
08/20/2008CN201103370Y Pumping rod unfreezing blow-out preventer
08/20/2008CN201103369Y Shaft mouth anti-theft oil alarm device
08/20/2008CN201103368Y Shaft mouth anti-theft oil sensor
08/20/2008CN201103367Y Shaft mouth swing type sealing device
08/20/2008CN201103366Y Sealing blowout preventer for pumping work
08/20/2008CN201103365Y Encrypted sealing joint for oil gas well
08/20/2008CN201103364Y Liquid fill adapter for gas well
08/20/2008CN201103363Y Water/gas calamity exploring and drilling anti-burst device
08/20/2008CN100412313C Plug-free cement filling method for well fixing
08/19/2008US7413023 Wellhead seal unit
08/19/2008US7413018 Apparatus for wellbore communication
08/19/2008US7413014 Cementing in a subterranean zone by providing a low density foamed cement comprising fly ash comprising calcium oxide or calcium hydroxide, water to form a slurry, foaming or foam stabilizing surfactant and gas; setting
08/14/2008WO2008098006A1 Wellhead system and connector for wellheads
08/14/2008WO2008097312A1 Swellable packer with enhanced sealing capability
08/14/2008WO2008096174A1 A method for recovering fluid from an underwater apparatus submerged in deep water
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