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 23 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
Patents for E21B 23 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells (12,712)
11/2012
11/21/2012CN102787825A Tool and method for cementing well and preventing channeling
11/21/2012CN101787855B Reentry device of later-operation pipe column of multi-branch well
11/20/2012US8312922 Metal-to-metal seal with travel seal bands
11/15/2012WO2012154686A1 Downhole shifting tool
11/15/2012WO2012154471A1 Expandable downhole casing coupling locator tool
11/15/2012WO2012154058A1 Mandrel arrangement and method of operating same
11/15/2012US20120285703 Hydro-mechanical downhole tool
11/15/2012US20120285702 System and method for actuating tools downhole
11/15/2012US20120285678 Running tool
11/15/2012CA2835238A1 Downhole shifting tool
11/14/2012CN202531096U Wall-hook packer for horizontal well fracturing
11/14/2012CN202531071U Hydraulic oil pipe anchoring device
11/14/2012CN202531070U Blowout preventer transfer device
11/14/2012CN202531069U Fixed-angle salvage device
11/14/2012CN202531068U Slave tube hanger of dual-tube well
11/14/2012CN202531067U Dropping-salvaging head of gas lift valve
11/14/2012CN102777145A Electric control fluid drive coiled tubing downhole retractor
11/13/2012US8307903 Methods and apparatus for subsea well intervention and subsea wellhead retrieval
11/13/2012US8307890 Whipstock assembly
11/08/2012WO2012091984A3 Dissolvable barrier for downhole use and method thereof
11/08/2012US20120279725 Expandable Tubular Centralizer
11/08/2012US20120279724 Downhole tractor
11/08/2012US20120279716 Oil-Gas Well Structure for Facilitating Extracting a Downhole Filter String and Method for Extracting the String
11/08/2012US20120279709 Expandable downhole casing coupling locator tool
11/08/2012US20120279701 Locking Assembly for Mechanically Set Packer
11/07/2012EP2519707A1 Downhole guiding tool
11/07/2012CN202520257U Device for replacing main control valve of christmas tree without killing well
11/07/2012CN101624902B Anchor for coaxially bidirectionally anchoring oil pump
11/06/2012US8302696 Actuator and tubular actuator
11/06/2012US8302682 Wireline tractor device
11/06/2012US8302679 Expandable ramp gripper
11/06/2012DE202012007972U1 Spannpacker mit mechanischer Spannvorrichtung Clamping packer with mechanical tensioner
11/06/2012CA2521033C Drifting tubing
11/01/2012WO2012149318A2 Expansion system for an expandable tubular assembly
11/01/2012WO2012149224A2 Expandable open-hole anchor
11/01/2012WO2012148429A1 Shock load mitigation in a downhole perforation tool assembly
11/01/2012WO2012146725A1 Downhole cleaning system
11/01/2012WO2012048180A8 Electrically driven coiled tubing injector assembly
11/01/2012US20120273238 Jacking units and bellows for down hole intervention tools
11/01/2012US20120273237 Expansion system for an expandable tubular assembly
11/01/2012US20120273236 Expandable open-hole anchor
11/01/2012US20120273235 Flow-induced electrostatic power generator for downhole use in oil and gas wells
11/01/2012US20120273234 Flow-induced electrostatic power generator for downhole use in oil and gas wells
11/01/2012US20120273231 Downhole release joint
11/01/2012US20120273224 Electronic Control System for a Downhole Tool
11/01/2012CA2834472A1 Downhole cleaning system
11/01/2012CA2834293A1 Casing relief valve
11/01/2012CA2834253A1 Smart hydraulic pumping device for recovery of oil and obtaining of infomation from the reservoir
11/01/2012CA2834026A1 Expandable open-hole anchor
11/01/2012CA2833882A1 Expansion system for an expandable tubular assembly
11/01/2012CA2832785A1 Improved limit collar
10/2012
10/31/2012EP2516795A2 Hydraulic deployment of a well isolation mechanism
10/31/2012EP2516794A2 Automatic modular maintenance device operating in the annulus of a well for the production of hydrocarbons
10/31/2012CN202510071U Logging instrument pushing device for horizontal well production
10/31/2012CN202510070U Surface casing hanger
10/31/2012CN102758593A Valve replacing device for water injection well under condition of pressure
10/30/2012US8297365 Drilling string back off sub apparatus and method for making and using same
10/30/2012US8297350 Method and system for accessing subterranean deposits from the surface
10/26/2012WO2012097071A3 Oilfield apparatus and method comprising swellable elastomers
10/26/2012WO2012094488A3 Shape memory material packer for subterranean use
10/26/2012WO2012091840A4 Isolation of zones for fracturing using removable plugs
10/26/2012WO2012083180A3 "packer assembly with sealing bodies"
10/25/2012US20120267123 Expandable packer
10/25/2012US20120267121 Limit collar
10/24/2012CN202500522U Hydraulic setting tool
10/24/2012CN102753783A Automatic modular maintenance device operating in the annulus of a well for the production of hydrocarbons
10/24/2012CN102747972A Cable following type releasing method
10/24/2012CN102747971A Special take-out tool for hydraulic injector and underwater hydraulic injector take-out method
10/24/2012CN101718190B Completed well body structure with temporary plugging function screen pipe and well completion method for suspending screen pipe at tail pipe
10/23/2012US8291986 Expandable liner hanger
10/18/2012WO2012141881A2 Pressure equalization apparatus and associated systems and methods
10/18/2012WO2012059469A3 Expandable packer
10/17/2012EP2511470A2 Cluster opening sleeves for wellbore
10/17/2012EP2510190A2 Wirelessly actuated hydrostatic set module
10/17/2012EP2510184A1 Non-explosive power source for actuating a subsurface tool
10/17/2012EP2510183A2 Kick-over tool
10/17/2012EP2510182A2 Landing system for well casing
10/17/2012CN102733790A Sliding sleeve sand blower with hydraulic anchor
10/17/2012CN102733769A Method for landing supporting tube in multi-branch horizontal well
10/17/2012CN101718179B Safe setting method of expansion pipe
10/16/2012US8286718 Downhole tubular expander and method
10/16/2012US8286717 Tools and methods for hanging and/or expanding liner strings
10/16/2012US8286716 Low stress traction system
10/16/2012US8286711 Running tool that prevents seal test
10/16/2012US8286700 Damping and sealing device for a well pipe having an inner flow passage and method of using thereof
10/16/2012US8286699 Multiple production string apparatus
10/16/2012CA2622717C Method and apparatus for communicating signals to an instrument in a wellbore
10/16/2012CA2610857C A downhole activation tool using reacting hydrogen peroxide
10/11/2012WO2012138556A2 Borehole metal member bonding system and method
10/11/2012WO2012136258A1 Temperature responsive packer and associated hydrocarbon production system
10/11/2012CA2827132A1 Borehole metal member bonding system and method
10/10/2012EP2507467A2 Grip enhanced tractoring
10/10/2012CN202483492U Hydraulic drive system of wellhead tool of oil rig
10/10/2012CN202483491U Self-orientation positioning device for branch well
10/10/2012CN202483490U Multipoint support type hydraulic anchor
10/10/2012CN202483489U Feeding device of wireless measurement-while-drilling inclinometer
10/10/2012CN102720477A Wheeled telescopic continuous creeping tractor used for horizontal well
10/10/2012CN102720454A Device for feeding support pipe in multi-branch horizontal well
10/10/2012CN101624901B Anchoring device of screw pump
10/09/2012US8281868 Torque transmitting load shoulder
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