| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 03/26/2008 | CN201041012Y Sealing stuffing box press-cap anti-falling device |
| 03/26/2008 | CN201041011Y Multifunctional polish rod sealing device |
| 03/26/2008 | CN101148976A Non-well killing change christmas tree device and using method thereof |
| 03/25/2008 | US7347274 Annular barrier tool |
| 03/25/2008 | US7347273 Bottom hold completion system for an intermittent plunger |
| 03/25/2008 | US7347265 Method of forming temporary blocking gel containing guar derivative |
| 03/25/2008 | US7347264 Methods and compositions for well completion in steam breakthrough wells |
| 03/25/2008 | US7347263 surprising stability in waters having high salt content/salinity makes them useful for injection into subterranean formations to alter the permeability; hydrophilic polymer containing at least two groups which are independently a primary amine group or a secondary amine group and saccharide |
| 03/25/2008 | US7347262 Downhole sampling tool and method for using same |
| 03/25/2008 | CA2603337A1 Composite cement retainer |
| 03/25/2008 | CA2560501C Procedures and equipment for profiling and jointing of pipes |
| 03/25/2008 | CA2504300C Isolation assembly for coiled tubing |
| 03/25/2008 | CA2370718C Foamed well cement slurries, additives and methods |
| 03/25/2008 | CA2240058C Coupling device for a drive assembly |
| 03/20/2008 | WO2008033714A2 Forming a metal-to-metal seal in a well |
| 03/20/2008 | WO2008033536A2 Method of forming subterranean barriers with molten wax |
| 03/20/2008 | WO2008033385A1 Drillable bridge plug |
| 03/20/2008 | WO2008033115A1 Swellable packer construction |
| 03/20/2008 | WO2008032112A1 Well construction and completion |
| 03/20/2008 | WO2008032049A1 Method to control the physical interface between two or more fluids |
| 03/20/2008 | WO2008032045A1 Packer element retaining system |
| 03/20/2008 | WO2008031923A1 Flow meter |
| 03/20/2008 | WO2008031914A1 Measuring head and measuring method |
| 03/20/2008 | WO2008016663A3 Modified christmas tree components and associated methods for using coiled tubing in a well |
| 03/20/2008 | WO2008002473A3 Wireline slip hanging bypass assembly and method |
| 03/20/2008 | WO2007054664A8 Subsea trees and caps for them |
| 03/20/2008 | US20080067810 Cementing swivel and retainer arm assembly and method |
| 03/20/2008 | US20080067458 Blowout preventer operator locking system |
| 03/20/2008 | US20080066906 Annular bop packing unit |
| 03/20/2008 | US20080066902 Bridge plug and setting tool |
| 03/20/2008 | US20080066655 Low density cements for use in cementing operations |
| 03/20/2008 | US20080066654 Mix of portland cement, fly ash, slag, silica fume, gypsum, bentonite and limestone, diatomaceous earth, zeolite, an alkali metasilicate and/or alkali silicate, an inorganic salt accelerator and an aluminum silicate; good compressive strength |
| 03/20/2008 | CA2662742A1 Measuring head and measuring method |
| 03/20/2008 | CA2662615A1 Method of forming subterranean barriers with molten wax |
| 03/20/2008 | CA2662119A1 Forming a metal-to-metal seal in a well |
| 03/20/2008 | CA2662108A1 Flow meter |
| 03/19/2008 | EP1899572A2 Wellhead bypass method and apparatus |
| 03/19/2008 | CN201037427Y Extrusive danger coal bed safety guide spraying drilling device |
| 03/19/2008 | CN201037416Y Mine mouth pressure testing device |
| 03/19/2008 | CN201037396Y Upstrain release repeatable unset packer |
| 03/19/2008 | CN201037395Y Separated unsealing water well packer |
| 03/19/2008 | CN201037394Y Hydraulic type water-stoppage packer |
| 03/19/2008 | CN201037393Y Small-diameter expanding type squeeze packer |
| 03/19/2008 | CN201037392Y 抽油杆防喷器 Sucker rod BOP |
| 03/19/2008 | CN201037391Y Deep layer anti-theft high-pressure resistant exhaust double-layer oil-water-gas well sealing equipment |
| 03/19/2008 | CN201037390Y Fast installed well head bolt nut |
| 03/19/2008 | CN201037389Y Mine mouth anti-theft box |
| 03/19/2008 | CN201037388Y Packing box with movable box body |
| 03/19/2008 | CN101144377A Oil well sucker rod pump oil pumping completion tubular pile plugging device with pressure |
| 03/18/2008 | US7343983 Method and apparatus for isolating and testing zones during reverse circulation drilling |
| 03/18/2008 | US7343974 Method and apparatus for performing chemical treatments of exposed geological formations |
| 03/18/2008 | US7343968 Washpipe seal assembly |
| 03/18/2008 | CA2752135A1 Method of retreiving a mobilty enhanced formation fluid sample |
| 03/18/2008 | CA2329388C Apparatus and method for packing or anchoring an inner tubular within a casing |
| 03/13/2008 | US20080061510 Forming a metal-to-metal seal in a well |
| 03/13/2008 | US20080060821 Packer element retaining system |
| 03/13/2008 | US20080060820 Method to control the physical interface between two or more fluids |
| 03/13/2008 | US20080060816 Wellhead seal unit |
| 03/13/2008 | US20080060815 Wellhead seal unit |
| 03/13/2008 | US20080060814 Casing Shoes and Methods of Reverse-Circulation Cementing of Casing |
| 03/13/2008 | US20080060813 Casing Shoes and Methods of Reverse-Circulation Cementing of Casing |
| 03/13/2008 | US20080060811 Method to control the physical interface between two or more fluids |
| 03/13/2008 | US20080060802 System for reducing adhesion and cohesion between non metallic bailers and side wall of wells |
| 03/12/2008 | EP1896689A2 Pipe running tool having a cement path |
| 03/12/2008 | EP1896686A2 Tubular runing tool and method of using same |
| 03/12/2008 | CN201034025Y Novel well mouth blow-out preventer for well logging |
| 03/12/2008 | CN201034024Y Automatic center-regulating direction-adjusting vibration-friction resistant pumping unit rod sealing device |
| 03/12/2008 | CN201034023Y Pumping rod sheave root |
| 03/12/2008 | CN201034022Y Eccentric-wear preventive eccentric adaptor of pumping rod |
| 03/12/2008 | CN201034021Y Pipe line collar clamp head sealing arrangement |
| 03/12/2008 | CN201034020Y Christmas tree gate under-pressure repairing apparatus |
| 03/12/2008 | CN101139920A Dibasic composite horizontal well bottom water plugging technique |
| 03/12/2008 | CN101139919A Negative pressure well cementing system and control method thereof |
| 03/12/2008 | CN101139918A Layered water blocking device for oil exploitation well |
| 03/12/2008 | CN101139917A Mounts for blowout preventer bonnets |
| 03/12/2008 | CN101139916A Macroscopic path plunger reciprocating machinery dynamic-sealing mine mouth |
| 03/12/2008 | CN101139912A Deepwater drilling apparatus with automatic-upending subaqueous blow-out preventer |
| 03/11/2008 | US7341117 Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell |
| 03/11/2008 | US7341111 Expandable bridge plug and setting assembly |
| 03/11/2008 | US7341110 Slotted slip element for expandable packer |
| 03/11/2008 | US7341106 Methods for wellbore strengthening and controlling fluid circulation loss |
| 03/11/2008 | US7341105 Cementitious compositions for oil well cementing applications |
| 03/11/2008 | US7341104 Methods of using substantially hydrated cement particulates in subterranean applications |
| 03/11/2008 | US7341101 Enclosed radial wire-line cable conveying method and apparatus |
| 03/11/2008 | CA2450815C Method and apparatus for replacing bop with gate valve |
| 03/11/2008 | CA2430784C Abrasion resistant frac head |
| 03/07/2008 | CA2600602A1 Annulus pressure control drilling systems and methods |
| 03/06/2008 | WO2008026148A1 Drillstring packer assembly |
| 03/06/2008 | WO2008005289A3 Method for improved well control with a downhole device |
| 03/06/2008 | WO2007150022A3 Swelling element packer and installation method |
| 03/06/2008 | US20080059073 Methods and apparatus for handling and drilling with tubulars or casing |
| 03/06/2008 | US20080053706 Continuous monobore liquid lining system |
| 03/06/2008 | US20080053702 Assembly and Method for Determining Thermal Properties of a Formation and Forming a Liner |
| 03/06/2008 | US20080053664 Method and apparatus for ecp element inflation utilizing solid laden fluid mixture |
| 03/06/2008 | US20080053657 Method of manufacturing and using rod-shaped proppants and anti-flowback additives |
| 03/06/2008 | US20080053652 Drillstring packer assembly |
| 03/06/2008 | US20080053650 Drive for a rotating chemical dispensing apparatus |
| 03/06/2008 | CA2661606A1 Method of storage of sequestered greenhouse gasses in deep underground reservoirs |
| 03/06/2008 | CA2559226A1 Method and apparatus for well casing repair and plugging utilizing molten metal |
| 03/05/2008 | CN201031679Y Deep layer gas well multiple fracturing tools string |