| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 05/30/2002 | US20020062966 Wellhead assembly for injecting a fluid into a well and method of using the same |
| 05/30/2002 | US20020062965 Wellhead assembly for accessing an annulus in a well and a method for its use |
| 05/30/2002 | US20020062964 Method and apparatus for injecting a fluid into a well |
| 05/30/2002 | US20020062962 Packer with equalizing valve and method of use |
| 05/30/2002 | US20020062960 Rigless one-trip perforation and gravel pack system and method |
| 05/30/2002 | US20020062957 Tubing hanger lockdown mechanism |
| 05/29/2002 | CN1351106A High-water water blocking mixture and its preparing process and application |
| 05/28/2002 | US6394837 Electrical connector system |
| 05/28/2002 | US6394461 Pressure compensated stuffing box for reciprocating pumping units |
| 05/28/2002 | US6394460 One-piece ram element block for wireline blowout preventers |
| 05/28/2002 | US6394194 Method and apparatus for a drill cutting injection system |
| 05/28/2002 | US6394186 Apparatus for remote adjustment of drill string centering to prevent damage to wellhead |
| 05/28/2002 | US6394184 Method and apparatus for stimulation of multiple formation intervals |
| 05/28/2002 | US6394180 Frac plug with caged ball |
| 05/23/2002 | WO2002021072A3 Displacement measurement with a spring and force measurement for actuators, blow-out preventers, valves |
| 05/23/2002 | US20020060079 Method and apparatus for downhole sealing |
| 05/23/2002 | US20020060078 Forming a wellbore casing while simultaneously drilling a wellbore |
| 05/23/2002 | US20020060075 Method and apparatus for use with two or more hydraulic conduits deployed downhole |
| 05/23/2002 | US20020060069 Forming a wellbore casing while simultaneously drilling a wellbore |
| 05/23/2002 | US20020060068 Forming a wellbore casing while simultaneously drilling a wellbore |
| 05/23/2002 | DE10052168A1 Device for closing boreholes comprises a threaded connection which takes the form of a sleeve which is held in the cover plate by means of a press fit |
| 05/22/2002 | EP1206623A1 Anti-rotation device for use with well tools |
| 05/22/2002 | CN2492678Y Self-anchored pressure difference packer |
| 05/21/2002 | US6390202 Setting an annular seal |
| 05/21/2002 | US6390200 Drop ball sub and system of use |
| 05/21/2002 | US6390197 Well completion |
| 05/21/2002 | US6390196 Method and apparatus for completing a well for producing hydrocarbons or the like |
| 05/21/2002 | US6390194 Method and apparatus for multi-diameter testing of blowout preventer assemblies |
| 05/21/2002 | CA2236585C Sampling device |
| 05/21/2002 | CA1341360C Liquid composition for the production of a gel and process for inserting such gel in a well |
| 05/16/2002 | WO2002038913A1 Energized sealing cartridge for annulus sealing between tubular well components |
| 05/16/2002 | WO2002038912A1 Recovery of production fluids from an oil or gas well |
| 05/16/2002 | WO2002038343A2 Apparatus and methods for separating and joining tubulars in a wellbore |
| 05/15/2002 | EP1205632A2 Method of locating a cementing plug in a subterranean well |
| 05/15/2002 | EP1205628A1 A grease tube |
| 05/15/2002 | EP1204808A1 Drilling and completion system for multilateral wells |
| 05/15/2002 | EP1204616A1 A low-density and low-porosity cementing slurry for oil wells or the like |
| 05/15/2002 | CN2491597Y Land well antitheft box |
| 05/15/2002 | CN1349586A Downhole device for controlling fluid flow in a well |
| 05/15/2002 | CN1349036A Rotary operation equipment for light overhaul of oil-water well and its circulation system |
| 05/14/2002 | US6386796 Composite particles and methods for their application and implementation |
| 05/14/2002 | US6386292 Wellbore annulus packer apparatus and method |
| 05/14/2002 | US6386291 Subsea wellhead system and method for drilling shallow water flow formations |
| 05/14/2002 | US6386290 System for accessing oil wells with compliant guide and coiled tubing |
| 05/14/2002 | US6386225 Modular catch pan for wellheads and a method of use of the same |
| 05/14/2002 | US6386111 Stemming arrangement and method for blast holes |
| 05/14/2002 | CA2175641C Dual tubing string hanging apparatus |
| 05/14/2002 | CA2145130C Method for running downhole tools and devices with coiled tubing |
| 05/10/2002 | WO2002036934A1 Two-stage downhole packer |
| 05/10/2002 | WO2002036932A1 Apparatus and method for connecting tubular members |
| 05/10/2002 | WO2002036928A1 Continuous circulation drilling method |
| 05/10/2002 | CA2718929A1 Coupling apparatus |
| 05/10/2002 | CA2427204A1 Continuous circulation drilling method |
| 05/09/2002 | US20020053433 Cement diverter system for multilateral junctions and method for cementing a junction |
| 05/08/2002 | EP1203424A1 Electrical connectors |
| 05/08/2002 | EP1203139A1 Methods and apparatus for the emergency actuation of control systems |
| 05/08/2002 | EP0885345B1 High pressure tree cap |
| 05/08/2002 | CN2490313Y High-pressure squeezing packer |
| 05/08/2002 | CN2490312Y Hydraulic compression underground repeated setting packer for washability well |
| 05/07/2002 | US6384389 Eutectic metal sealing method and apparatus for oil and gas wells |
| 05/07/2002 | CA2218202C Oil well blow-out preventer |
| 05/02/2002 | WO2002035257A2 Clamping well casings |
| 05/02/2002 | WO2002035054A1 Method and apparatus for in-situ production well testing |
| 05/02/2002 | WO2000079093A9 Well packer and method |
| 05/02/2002 | WO2000043632A9 System with a compliant guide and method for inserting a coiled tubing into an oil well |
| 05/02/2002 | US20020050360 Forming a wellbore casing while simultaneously drilling a wellbore |
| 05/02/2002 | EP0960263B1 Tool and method for removing excess cement from the top of a liner after hanging and cementing thereof |
| 04/30/2002 | US6380138 Injection molded degradable casing perforation ball sealers fluid loss additive and method of use |
| 04/30/2002 | US6380137 Used as additives in drilling fluids, for cementation, as completion and workover fluids, and for water shutoff |
| 04/30/2002 | US6378614 Method of landing items at a well location |
| 04/30/2002 | US6378613 Large bore subsea Christmas tree and tubing hanger system |
| 04/30/2002 | US6378611 Procedure and device for treating well perforations |
| 04/30/2002 | US6378610 Communicating with devices positioned outside a liner in a wellbore |
| 04/30/2002 | US6378606 High temperature high pressure retrievable packer with barrel slip |
| 04/30/2002 | US6378399 Granular particle gripping surface |
| 04/25/2002 | WO2002033213A2 Transport and supply frame for bop assembly |
| 04/25/2002 | US20020049280 Latex prepared by aqueous emulsion polymerization of styrene and butadiene in the presence of a seed polymer containing 2-acrylamido-2-methylpropanesulfonic acid; cement additive; cementing well bores |
| 04/25/2002 | US20020046845 Hydraulic actuator |
| 04/25/2002 | US20020046843 Hydraulic actuator |
| 04/25/2002 | US20020046834 Hydraulic actuator |
| 04/24/2002 | CN2487864Y Blow-out preventer driven by hydraulic action or hand |
| 04/24/2002 | CN2487863Y Universal packer box |
| 04/24/2002 | CN1346422A Method for annalar sealing |
| 04/24/2002 | CN1346011A Method for blocking perforation of oil well by explosion and blocking bullet |
| 04/24/2002 | CN1345907A Water plugging agent for petroleum well |
| 04/23/2002 | US6374917 Inflation element for a downhole tool having a pre-disposed bladder and/or cover, and method shaping tool for pre-disposing the bladder and/or cover |
| 04/23/2002 | US6374915 Process and apparatus for sealing abandoned well bores |
| 04/23/2002 | US6374914 Duel completion bop centralizer |
| 04/23/2002 | CA2229198C Tubing hanger to permit axial tubing displacement in a well bore and method of using same |
| 04/23/2002 | CA2171257C Blow-out preventer |
| 04/23/2002 | CA2153255C Method for installing a gravel pack completion adjacent a formation in a well |
| 04/23/2002 | CA2097188C Process for rock consolidation and/or cavity filling e.g. in tunnel construction and mining |
| 04/18/2002 | US20020043368 Anti-extrusion device for downhole applications |
| 04/17/2002 | EP1197633A1 Open-hole test method and apparatus for subterranean wells |
| 04/17/2002 | EP1197632A2 Anti-extrusion ring |
| 04/17/2002 | EP1078022A4 Injection molded degradable casing perforation ball sealers |
| 04/17/2002 | EP0801705B1 Low profile and lightweight high pressure blowout preventer |
| 04/17/2002 | CN2486733Y Pressure differential hydraulic compressive washable well packet |
| 04/17/2002 | CN2486732Y Rotary blowout preventer clamp tube for drilling well |
| 04/17/2002 | CN2486731Y Arc packing |