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)
05/1991
05/29/1991EP0428515A1 Electrical connectors.
05/29/1991CA2029294A1 Inflatable tool with rib expansion support
05/28/1991US5018579 Arrangement and method for conducting substance and seal therefor
05/28/1991US5018578 Method of arresting hydraulic fracture propagation
05/28/1991US5018574 Tubing conveyed wellbore fluid flow measurement apparatus
05/28/1991US5018321 Subterranean well welding habitat
05/27/1991CA2016662A1 One-trip washdown system
05/22/1991EP0428422A2 Method and apparatus for measurements related to fluid flow in a borehole
05/22/1991CN1051607A Method of well completion
05/21/1991US5016713 In-situ gelation in bottom zone for upward flow
05/16/1991WO1991007567A1 Tubing conveyed wellbore fluid flow measurement apparatus
05/16/1991CA2045537A1 Tubing conveyed wellbore fluid flow measurement apparatus
05/15/1991EP0427424A2 Wash tool
05/15/1991EP0427422A2 Casing valve
05/15/1991EP0427371A1 Method of well completion
05/15/1991CA2029783A1 Hydraulic clamp for rotary drilling head
05/14/1991US5014782 Venting packer
05/14/1991US5014781 Tubing collar position sensing apparatus, and associated methods, for use with a snubbing unit
05/14/1991CA1302235E High pressure adapter for wellheads
05/14/1991CA1284102C High pressure adapter for wellheads
05/14/1991CA1284101C Hydraulically operated and released isolation packer
05/14/1991CA1284099C Packer bypass
05/10/1991WO1991007570A1 Improved method for transporting particles in a porous medium
05/09/1991CA2029530A1 Wash tool
05/08/1991EP0425521A1 Process for inserting gel in a well.
05/08/1991EP0425511A1 Actuable mechanism and control therefor
05/08/1991EP0357711A4 A method and apparatus for repairing casing and the like
05/08/1991EP0353309A4 Method of constructing a well
05/08/1991DE3937034A1 Decontamination of limited area of ground newly contaminated - with oil, etc., by forming concrete barrier below contamination and flushing with oil-absorbent fluid
05/07/1991US5013187 Positioning components and energizing sealing assemblies therefor
05/07/1991US5013178 Latching mechanism
05/07/1991US5013005 Blowout preventer
05/07/1991US5012871 Fluid flow control system, assembly and method for oil and gas wells
05/07/1991US5012867 Well flow control system
05/07/1991US5012865 Annular and concentric flow wellhead isolation tool
05/07/1991US5012854 Pressure release valve for a subsea blowout preventer
05/07/1991CA1283848C Process for plugging subterranean formations, notably in the domain of oil field services and corresponding applications
05/02/1991EP0424452A1 Plug for well logging operations.
04/1991
04/30/1991US5011110 BOP seal with improved metal inserts
04/30/1991US5010958 Multiple cup bridge plug for sealing a well casing and method
04/30/1991US5010957 Environmental monitoring well housing and protection method
04/30/1991US5010952 Tubular member secured within a well support member with a preload
04/27/1991CA2028509A1 Method for using foams to improve alkaline flooding oil recovery
04/26/1991CA2027984A1 Protector for reciprocating rod fluid displacement arrangements
04/24/1991EP0423296A1 Device for blocking off a well in open flow.
04/24/1991CN2075695U Inlay self-irrigation inserting cement pouring device
04/23/1991US5009289 Blowout preventer string support
04/23/1991US5009265 Packer for wellhead repair unit
04/19/1991CA2025682A1 Casing suspension system
04/18/1991WO1991005134A1 Cementing apparatus
04/17/1991EP0422705A2 Wellhead assembly
04/17/1991CA2022905A1 Packer arrangement
04/16/1991CA1283039C Method and device for manipulating ferrofluids for use in cementing wells
04/12/1991CA2026482A1 Foam injected into a gravity override zone for improved hydrocarbon production
04/10/1991EP0421611A1 Method for selective plugging of a zone in a well
04/10/1991EP0421037A1 Hydraulic/torsion packoff installation tool and method of using same
04/10/1991CN2074812U Vertical sand storehouse rotary jet nozzle for sand release
04/10/1991CN2074811U Quick install simple well top device
04/10/1991CN2074810U Well top sleeve corrector
04/09/1991US5006177 Sodium silicate, sodium chloride with lignosulfonate and borax or citric acid to control setting
04/09/1991US5005802 Variable bore packer for a ram type blowout preventer
04/09/1991CA1282686C Annular wellhead seal
04/07/1991CA2021371A1 Hydraulic/torsion packoff installation tool
04/02/1991US5004273 Tieback thread with angular freedom
04/02/1991US5004272 Tendon bottom connector for a tension leg platform
04/02/1991US5004048 Cement
03/1991
03/27/1991EP0419281A2 Method of cementing a well
03/26/1991US5002431 Method of forming a horizontal contamination barrier
03/26/1991US5002131 Casing tensioning mechanism for a casing hanger
03/26/1991US5002130 System for handling reeled tubing
03/26/1991US5002127 Placement aid for dual injection placement techniques
03/26/1991CA1281998C Retrievable well bore tubular member packer arrangement and method
03/26/1991CA1281997C Wellhead isolation tool
03/26/1991CA1281996C Forming a coating on a borehole wall
03/20/1991EP0418056A1 Metal seal casing patch
03/20/1991EP0417879A1 Insulating support for tubing string
03/20/1991EP0417365A1 Marine casing suspension apparatus
03/20/1991CN1012090B Technology for extracting oil by mechanical discovering and plugging water and pipe column thereof
03/19/1991US5000719 Retrievable sealing plug and method of making same
03/19/1991US5000266 Hydraulic/torsion packoff installation tool
03/19/1991US5000265 Packing assembly for use with reeled tubing and method of operating and removing same
03/19/1991US5000261 Inflatable devices for suspending explosives in boreholes
03/19/1991CA1281637C Apparatus for dispensing chemicals into oil and gas wells
03/12/1991CA1281282C Wellhead seals
03/12/1991CA1281281C Casing guide for well template
03/12/1991CA1281280C Annular and concentric flow wellhead isolation tool and method of use thereof
03/06/1991CN1011903B Method and apparatus for packing boreholes absorbent layer
03/05/1991US4997042 Casing circulator and method
03/05/1991CA1281050C Casing patch seal
03/01/1991WO1991003620A1 Well casing flotation device and method
03/01/1991CA2065338A1 Well casing flotation device and method
02/1991
02/27/1991EP0414339A1 Wellhead joint and sealing ring
02/27/1991EP0232285B1 A valve actuator system for controlling of valves
02/27/1991CN1011827B Process and device for installing seismic sensors inside petroleum production well
02/26/1991US4995763 Offshore well system and method
02/26/1991US4995464 Longitudinally adjustable
02/26/1991US4995457 Cementing
02/26/1991CA2021477A1 Well apparatus
02/26/1991CA1280587C Spacer fluid
02/21/1991DE3926986A1 Injector packing bolt with hole through its axial centre - has tapered threaded end in correspondingly tapered threaded expanding sleeve
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