| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 09/25/2008 | US20080230236 Packing element and method |
| 09/25/2008 | US20080230235 Downhole bridge plug or packer setting assembly and method |
| 09/25/2008 | US20080230234 System and method for thermal change compensation in an annular isolator |
| 09/25/2008 | US20080230228 System and Method For Well Intervention |
| 09/25/2008 | US20080230227 Control System of an Actuator for the Actuation of Submarine Devices |
| 09/25/2008 | US20080230224 Spear Type Blow Out Preventer |
| 09/24/2008 | CN201121504Y Retrievable packer |
| 09/24/2008 | CN201121503Y Inversion type tail pipe rotary cementing head |
| 09/24/2008 | CN201121502Y Fast loading shaft mouth device for non-drilling rig well cementing |
| 09/24/2008 | CN201121501Y Pressure balancing oil production tree or gas production tree replacing device |
| 09/24/2008 | CN201121500Y Oil-production water-injection well mouth |
| 09/24/2008 | CN201121499Y Anti-theft plugging tubular pile for dead well |
| 09/24/2008 | CN201121491Y Bumper pin lever for fast connecting with cementing head |
| 09/24/2008 | CN201121487Y Deepwater drilling device based on near surface deviation |
| 09/24/2008 | CN101270637A Well building method for preventing brine seepage in salt wells |
| 09/24/2008 | CN101270634A Down-hole wall-fixing method |
| 09/24/2008 | CN101270277A Horizontal well segmenting perforating compression fracture technique and rubber plug of self-breaking glue solution bung |
| 09/23/2008 | US7427584 Treating composition |
| 09/23/2008 | CA2626861A1 Method and apparatus for isolating a wellhead for fracturing |
| 09/23/2008 | CA2565135C Blowout preventer and method for manipulating a ram block |
| 09/23/2008 | CA2522428C Method and apparatus for disposal of well flare gas in oil and gas drilling and recovery operations |
| 09/23/2008 | CA2514967C Alternative method to cementing casing and liners |
| 09/23/2008 | CA2496331C Seal assembly for a safety valve |
| 09/23/2008 | CA2409277C Wellbores utilizing fiber optic-based sensors and operating devices |
| 09/23/2008 | CA2368885C Method for annular sealing |
| 09/23/2008 | CA2365966C Method of creating a wellbore in an underground formation |
| 09/18/2008 | WO2008112330A1 Sealing material to metal bonding compositions and methods for bonding a sealing material to a metal surface |
| 09/18/2008 | WO2008111975A2 Well tool having enhanced packing element assembly |
| 09/18/2008 | WO2008111843A1 Sealing and anchoring device for use in a well |
| 09/18/2008 | US20080224413 Sealing material to metal bonding compositions and methods for bonding a sealing material to a metal surface |
| 09/18/2008 | US20080223588 Well tool having enhanced packing element assembly |
| 09/18/2008 | US20080223587 Ball injecting apparatus for wellbore operations |
| 09/18/2008 | US20080223586 Ball release procedure and release tool |
| 09/18/2008 | US20080223578 reducing the permeability of a subterranean formation; by forming a crosslinked gel by crosslinking a water soluble acrylamide copolymer with a polyanion complexed with a polycation; a polyethylene imine or polypropylene imine complexed with dextran sulfate |
| 09/18/2008 | US20080223577 Foam delivery system |
| 09/18/2008 | US20080223575 Casing and liner drilling bits and reamers, cutting elements therefor, and methods of use |
| 09/18/2008 | US20080223572 Method for drilling and casing a wellbore with a pump down cement float |
| 09/18/2008 | US20080223570 Wellhead isolation tool and wellhead assembly incorporating the same |
| 09/17/2008 | EP1970526A2 Top Drive Casing System |
| 09/17/2008 | EP1969246A1 Cam-actuated centrifugal brake for preventing backspin |
| 09/17/2008 | EP1799957B1 Blow out preventers |
| 09/17/2008 | EP1451442B1 Methods and compositions for sealing an expandable tubular in a wellbore |
| 09/17/2008 | CN201116462Y Well cementing cement foaming vehicle |
| 09/17/2008 | CN201116461Y Well head connecting device |
| 09/17/2008 | CN201116460Y Inner brake type well head christmas tree |
| 09/17/2008 | CN201116459Y Well head sealer |
| 09/17/2008 | CN201116456Y Oil well packing extractor |
| 09/17/2008 | CN101268249A Triple valve blow out preventer |
| 09/17/2008 | CN101265792A Hydraulic switch sliding bush |
| 09/17/2008 | CN101265789A Compound pressurized cyclone tail tube hanging packer |
| 09/17/2008 | CN101265788A Y tube anti-pollution method and its apparatus |
| 09/17/2008 | CN100419207C Oil well head sealing device |
| 09/16/2008 | US7424914 cementing wells using a mixture of calcium phosphate or aluminate, water and minerals selected from mica or vermiculite, and optionally wollastonite, basalt, carbon fibers or plastic fibers |
| 09/16/2008 | US7424913 Methods of using substantially hydrated cement particulates in subterranean applications |
| 09/16/2008 | US7424909 Drillable bridge plug |
| 09/16/2008 | CA2625766A1 Ball injecting apparatus for wellbore operations |
| 09/16/2008 | CA2562770C Retrievable frac mandrel and well control stack to facilitate well completion, re-completion or workover and method of use |
| 09/16/2008 | CA2501882C Telescoping centralizers for expandable tubulars |
| 09/13/2008 | CA2625155A1 Ball release procedure and release tool |
| 09/12/2008 | WO2008109891A1 A casing patch |
| 09/12/2008 | WO2008109890A1 Push/pull belleville stack for use with zertech mtm seal |
| 09/12/2008 | WO2008109693A2 Contacting surfaces using swellable elements |
| 09/12/2008 | WO2008109280A1 Subsea adapter for connecting a riser to a subsea tree |
| 09/12/2008 | WO2008109188A1 Annular seal |
| 09/12/2008 | WO2008107826A2 Reservoir stimulation while running casing |
| 09/12/2008 | WO2008106767A1 Fracturing method and apparatus utilizing gelled isolation fluid |
| 09/12/2008 | WO2008067152A3 Lubricator valve with rotational flip-flap arm |
| 09/12/2008 | CA2679948A1 Apparatus and method of fracturing |
| 09/11/2008 | US20080217860 Method for reducing extrusion of sealing elements |
| 09/11/2008 | US20080217025 Deformable ball seat and method |
| 09/11/2008 | US20080217011 Methods for treating a subterranean formation with a treatment fluid containing a gelling agent and subsequently breaking the gel with an oxidizer |
| 09/11/2008 | US20080216609 Granular Particle Gripping Surface |
| 09/10/2008 | EP1967691A1 Debris protection for sliding sleeve |
| 09/10/2008 | CN201111544Y Oil-submersible electric pump |
| 09/10/2008 | CN201111543Y Universal regulation shaft mouth packing kit |
| 09/10/2008 | CN201111542Y Pressured rolling wheel propelling logging sealing device |
| 09/10/2008 | CN101260795A Circulating piping oil extraction device |
| 09/10/2008 | CN101260790A Wellhead heat insulation and heating equipment for well workover |
| 09/10/2008 | CN101260177A Low molecular weight graft copolymers |
| 09/10/2008 | CN101260176A 磺化接枝共聚物 Sulfonated graft copolymer |
| 09/09/2008 | US7422071 Swelling packer with overlapping petals |
| 09/09/2008 | US7422070 Casing mandrel with well stimulation tool and tubing head spool for use with the casing mandrel |
| 09/09/2008 | US7422069 Telescoping centralizers for expandable tubulars |
| 09/09/2008 | US7422067 Deploying an assembly into a well |
| 09/09/2008 | US7422062 Methods of treating subterranean formations using treatment fluids comprising chlorinated carbohydrates |
| 09/09/2008 | US7422061 Pumping cement slurry including a derivatized hydroxypropyl starch as an additive for fluid loss control into the well bore and maintaining the cement slurry in place until the cement sets |
| 09/09/2008 | US7422060 Methods and apparatus for completing a well |
| 09/09/2008 | US7422058 Reinforced open-hole zonal isolation packer and method of use |
| 09/09/2008 | CA2459839C Methods and apparatus for connecting tubulars while drilling |
| 09/09/2008 | CA2450818C Valve system and method |
| 09/04/2008 | WO2008106639A2 Improved system and method for stimulating multiple production zones in a wellbore |
| 09/04/2008 | WO2008060893A3 Large bore packer and methods of setting same |
| 09/04/2008 | US20080210435 Subsea Trees and Caps for Them |
| 09/04/2008 | US20080210424 Apparatus and Method of Fracturing |
| 09/04/2008 | US20080210423 Circulated Degradable Material Assisted Diversion |
| 09/04/2008 | CA2677252A1 Mandrel and associated positioning method |
| 09/03/2008 | EP1965019A2 Subterranean well tool including a locking seal healing system |
| 09/03/2008 | EP1963618A1 Self centralizing non-rotational slip and cone system for downhole tools |
| 09/03/2008 | EP1963617A1 Slotted slip element for expandable packer |
| 09/03/2008 | EP1963616A1 Electrical power system for a subsea system |