| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 11/28/1995 | US5469918 Positive displacement device to improve placement of cement plugs |
| 11/22/1995 | EP0682739A1 Top drive apparatus |
| 11/22/1995 | CN2213227Y Oil drain device |
| 11/21/1995 | US5467825 Apparatus and method for hanging coiled tubing in wells |
| 11/21/1995 | US5467823 Methods and apparatus for long term monitoring of reservoirs |
| 11/21/1995 | US5467822 Pack-off tool |
| 11/21/1995 | US5467821 Rectilinear tool for use with a slotted face wellbore deviation assembly |
| 11/21/1995 | US5467820 Slotted face wellbore deviation assembly |
| 11/21/1995 | CA2006721C Cementing head for oil wells |
| 11/16/1995 | WO1995023273A3 Whipstock apparatus and methods of use |
| 11/15/1995 | CN1111710A Packer for C and WK |
| 11/14/1995 | US5465794 Hydraulic seal between tubing hanger and wellhead |
| 11/14/1995 | US5465793 Spoolable flexible hydraulic controlled annular control valve |
| 11/14/1995 | US5465788 Tubing string hanging apparatus |
| 11/14/1995 | US5465628 For extracting fluid samples from a desired zone underground |
| 11/14/1995 | US5465609 Apparatus for study of gas migration in cement slag |
| 11/09/1995 | WO1995022681A3 Tubing rotator and hanger |
| 11/08/1995 | EP0681087A2 Temporary plug system for well conduits |
| 11/07/1995 | US5464063 Well assembly metal seal |
| 11/07/1995 | US5464062 Metal-to-metal sealable port |
| 11/07/1995 | US5464060 Mixing with Portland cement and pozzolana; applying settable filter cake on walls; activating to harden |
| 11/07/1995 | CA2025791C Mixing apparatus and method |
| 11/01/1995 | CN1111064A Method and apparatus for oil or gas well cleaning |
| 10/31/1995 | US5462119 Tubing hanging set for a submarine oil-well, running tool for its placing and handling method |
| 10/27/1995 | CA2146272A1 Multiple-completion packer and locking element therefor |
| 10/25/1995 | EP0678656A2 Ram-type blowout preventor |
| 10/25/1995 | CN1110750A High-temp. compound resin sand-fixation agent and its preparation method |
| 10/20/1995 | CA2145145A1 Ram-type blowout preventer |
| 10/18/1995 | CN2210247Y Quick dropping rubber plug for sealing well |
| 10/17/1995 | US5458691 Method and apparatus for flushing fluid through the interstices of subsea umbilicals |
| 10/17/1995 | US5458199 Assembly and process for drilling and completing multiple wells |
| 10/17/1995 | US5458198 Method and apparatus for oil or gas well cleaning |
| 10/17/1995 | US5458194 Subsea inflatable packer system |
| 10/12/1995 | CA2144713A1 Inert stemming materials |
| 10/11/1995 | EP0676002A1 Anti-rotation devices for use with well tools |
| 10/11/1995 | CN2209719Y Sucker rod sealed valve for oil pumping well head |
| 10/10/1995 | US5456322 Coiled tubing inflatable packer with circulating port |
| 10/10/1995 | US5456321 For an oil well |
| 10/10/1995 | US5456320 Method for fracturing a subterranean formation |
| 10/10/1995 | US5456319 Apparatus and method for blocking well perforations |
| 10/10/1995 | US5456317 Buoyancy assisted running of perforated tubulars |
| 10/10/1995 | US5456314 Wellhead annulus seal |
| 10/10/1995 | US5456313 For use in a gas or oil field |
| 10/10/1995 | CA2034444C Method and apparatus for the determination of formation fluid flow rates and reservoir deliverability |
| 10/04/1995 | EP0674744A1 Assembly and process for drilling and completing multiple wells. |
| 10/03/1995 | US5454419 Method for lining a casing |
| 09/28/1995 | WO1995025876A1 Multi-operational expansion gasket |
| 09/28/1995 | CA2186106A1 Multi-operational expansion gasket |
| 09/27/1995 | EP0674094A1 Running downhole tools with coiled tubing |
| 09/27/1995 | CN2208616Y Light eccentric oil obtaining well head device |
| 09/26/1995 | US5452764 Cementing efficiency in horizontal wellbores via dual density fluids and cements |
| 09/20/1995 | CN2208096Y Cement pouring connecting ring |
| 09/20/1995 | CN2208095Y Smooth rod sealer |
| 09/20/1995 | CN1108731A Technology for overcoming U-shape tube effect in the course of pouring cement and apparatus thereof |
| 09/19/1995 | US5450905 Pressure assist installation of production components in wellhead |
| 09/19/1995 | US5450904 Adjustable tieback sub |
| 09/19/1995 | CA1337043C Process for isolating well production zones and apparatus for implementing said process |
| 09/16/1995 | CA2119103A1 Variable speed well head drive |
| 09/13/1995 | EP0671548A1 Flow line structure for interconnection of a satellite well to a subsea production system |
| 09/13/1995 | CN2207441Y Pumping well smooth rod break anti-blowout apparatus |
| 09/12/1995 | US5449040 Wireline-set tubing-release packer apparatus |
| 09/06/1995 | EP0670413A2 Cement head quick connector |
| 09/05/1995 | US5447986 Acceleration of gelation of water soluble polymers |
| 09/05/1995 | CA2108838C Apparatus for rotating a tubing string of a pumping wellhead |
| 08/31/1995 | WO1995023273A2 Whipstock apparatus and methods of use |
| 08/31/1995 | DE4294552C2 Clearing of plug to restore well flow |
| 08/29/1995 | CA2142917A1 Casing valve |
| 08/24/1995 | WO1995022681A2 Tubing rotator and hanger |
| 08/24/1995 | WO1995022680A1 A protective device for an installation mounted on the seabed |
| 08/23/1995 | CN2205869Y Integrated well packer |
| 08/22/1995 | US5443328 Connecting apparatus |
| 08/22/1995 | US5443129 Apparatus and method for orienting and setting a hydraulically-actuatable tool in a borehole |
| 08/22/1995 | US5443124 Hydraulic port collar |
| 08/22/1995 | US5443123 Method of particulate consolidation |
| 08/22/1995 | US5443122 Plug container with fluid pressure responsive cleanout |
| 08/22/1995 | US5443117 Frac pack flow sub |
| 08/17/1995 | WO1995021989A1 A method for providing a substantially leakproof shielding layer in the ground and a device for performing the method |
| 08/16/1995 | CN2205440Y Self well-sealing device |
| 08/15/1995 | US5441311 Connector with opposite moving cam rings |
| 08/15/1995 | US5441310 Cement head quick connector |
| 08/15/1995 | US5441112 Integrated base for oil drilling and production work |
| 08/15/1995 | US5441111 Bridge plug |
| 08/15/1995 | US5441108 Fluid spill catching, containing, collection and recovery system for wellheads |
| 08/10/1995 | WO1995021483A1 Apparatus for terminating and interconnecting rigid electrical cable and method |
| 08/09/1995 | EP0517892B1 Method for reducing the permeability disparity between two zones of a geological formation and use thereof for recovering hydrocarbons |
| 08/09/1995 | CN2204851Y Hot expanding sealer for hot production |
| 08/08/1995 | US5439066 Method and system for downhole redirection of a borehole |
| 08/08/1995 | US5439061 Adjustable surface well head casing hanger |
| 08/08/1995 | US5439056 Using cementitious composition comprising drilling fluid, coal slag and lime |
| 08/08/1995 | US5439053 Reinforcing slat for inflatable packer |
| 08/08/1995 | US5439052 Pitless adapter valve for wells |
| 08/02/1995 | EP0664850A1 Method for drilling and cementing a well |
| 08/02/1995 | EP0522031B1 Improvements in or relating to subsea control systems and apparatus |
| 08/01/1995 | US5437340 Millout whipstock apparatus and method |
| 08/01/1995 | US5437332 Control system for wild oil and gas wells and other uncontrolled dangerous discharges |
| 08/01/1995 | US5437330 Liner cementing system and method |
| 08/01/1995 | US5437302 Equipment for the interconnection of two lines to allow running of pigs |
| 08/01/1995 | CA2086599C Process for enhanced delayed in situ gelation of chromium polyacrylamide gels |
| 07/26/1995 | EP0664373A2 A tool and method of boring and filling the borehole with concrete without removing soil therefrom |
| 07/26/1995 | CA2120098A1 Process for controlling gas influx into well bores |