| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 07/17/1990 | US4941982 Calcium-free clear high density fluids |
| 07/17/1990 | US4941819 Air circulation and exhaust control system for commercial ovens |
| 07/17/1990 | US4941691 Subsea wellhead equipment |
| 07/17/1990 | US4941535 Manual port closing tool for well cementing |
| 07/17/1990 | US4941534 Method and apparatus for sealing a casing in a subterranean well bore |
| 07/17/1990 | CA1271704A1 Wellhead drilling and completion apparatus |
| 07/12/1990 | WO1990007627A1 System and method for sealed connection between two abutting tube ends |
| 07/11/1990 | EP0377255A1 Cementing head for oil wells |
| 07/10/1990 | US4940095 Deployment/retrieval method and apparatus for well tools used with coiled tubing |
| 07/10/1990 | US4940087 Seating arrangement and structure of a spool within a well casing |
| 07/10/1990 | CA1271414A1 Tamp hole plug system |
| 07/10/1990 | CA1271413A1 Well bore treating fluid tool |
| 07/09/1990 | CA2002037A1 Method for setting well casing using a resin coated particulate |
| 07/05/1990 | DE3900050A1 Method of cementing a pipe string and apparatus for carrying out the method |
| 07/04/1990 | EP0376431A1 Annular port-closing tool and method for well cementing |
| 07/03/1990 | US4938290 Wireline blowout preventer having mechanical and hydraulic sealing |
| 07/03/1990 | US4938289 Surface wellhead |
| 07/03/1990 | CA1271135A1 Retrievable well packer |
| 06/27/1990 | CN2058692U Screw disk-seal tube |
| 06/26/1990 | US4936387 Method and apparatus for completion of a horizontal well |
| 06/26/1990 | US4936386 Method for sealing well casings in the earth |
| 06/26/1990 | US4936385 Driving acid curable resin into wellbore, hardening, forming sieve |
| 06/26/1990 | US4936382 Drive pipe adaptor |
| 06/20/1990 | EP0374016A2 Inductively coupled connector for equipping surface well installations |
| 06/20/1990 | EP0373766A2 Subsea wellhead with annulus monitoring system |
| 06/19/1990 | US4934460 Pressure compensating apparatus and method for chemical treatment of subterranean well bores |
| 06/19/1990 | US4934459 Subterranean well anchoring apparatus |
| 06/19/1990 | US4934452 Sub-surface release plug assembly |
| 06/14/1990 | WO1990006419A1 Universal flexbowl wellhead and well completion method |
| 06/14/1990 | WO1990004699A3 Float collar and plug for use in wells |
| 06/13/1990 | EP0372594A2 Tool for treating subterranean wells |
| 06/13/1990 | EP0372535A1 Process for establishing a measuring point for ground water, and device for carrying out this process |
| 06/13/1990 | DE3838537A1 Process for the underground production and for the lining of elongate cavities, in which it is not possible to walk, by the in-situ pipe |
| 06/13/1990 | CN2058205U High pressure ground water intercept device |
| 06/13/1990 | CN1008384B Rotary-track clamping-bush type packer |
| 06/12/1990 | US4932811 Well head conductor and/or caisson support system |
| 06/12/1990 | US4932472 Packoff with flexible section for casing hanger |
| 06/12/1990 | CA1270188A1 Process for selectively treating a subterranean formation using coiled tubing without affecting or being affected by the two adjacent zones |
| 06/12/1990 | CA1270187A1 Well bore servicing arrangement and method |
| 06/06/1990 | EP0371576A1 Non-rotating plug set |
| 06/05/1990 | US4930745 Variable bore ram rubber |
| 06/05/1990 | US4930577 Well sealing apparatus and method |
| 06/05/1990 | US4930575 Method of protecting a permeable formation |
| 06/05/1990 | US4930573 Dual hydraulic set packer |
| 06/05/1990 | CA1269925A1 Connector for well servicing system |
| 05/31/1990 | WO1990005832A1 Method of casing the production seam in a well |
| 05/30/1990 | EP0370744A1 A method of and apparatus for installing a casing under tension |
| 05/29/1990 | US4928769 Casing hanger running tool using string weight |
| 05/29/1990 | US4928763 Method of treating a permeable formation |
| 05/29/1990 | US4928762 For use in a well bore |
| 05/29/1990 | US4928759 Tubing conveyed wellbore fluid flow measurement system |
| 05/29/1990 | US4928522 Steam injection survey apparatus and method for testing wells |
| 05/29/1990 | US4928520 Plug release indicator |
| 05/29/1990 | CA1269615A1 Methods and apparatus for well completion operations |
| 05/23/1990 | EP0369591A1 Grouting well platform legs |
| 05/23/1990 | CN2057455U Righting type packer for cleaning well |
| 05/22/1990 | US4927112 Seal assembly |
| 05/22/1990 | CA1269321A1 Borehole plug and method |
| 05/22/1990 | CA1269320A1 High temperature packer for well conduits |
| 05/16/1990 | EP0368515A1 Method and apparatus for supporting one tubular member within another |
| 05/15/1990 | US4924950 Method of drilling a well by utilizing AE/MA measurement |
| 05/15/1990 | US4924941 Bi-directional pressure assisted sealing packers |
| 05/15/1990 | CA2002392A1 Inflatable packer with improved reinforcing members |
| 05/09/1990 | EP0367419A1 Collet type connector |
| 05/09/1990 | EP0367376A2 Apparatus and method for testing a blow-out prevention device |
| 05/09/1990 | CN2056938U Take-down packer |
| 05/08/1990 | US4923008 Hydraulic power system and method |
| 05/08/1990 | US4923007 Inflatable packer with improved reinforcing members |
| 05/08/1990 | US4923006 Insulating support for tubing string |
| 05/08/1990 | US4923005 System for handling reeled tubing |
| 05/07/1990 | CA2002373A1 Method and apparatus for supporting one tubular member with another |
| 05/03/1990 | WO1990004699A2 Float collar and plug for use in wells |
| 05/02/1990 | CN2056693U Hydraulic pump divide pumping seal device |
| 05/02/1990 | CN2056692U Self adjustable anti-spurting box of oil pump well smooth roll |
| 05/02/1990 | CN2056691U Anti-spurting rubber valve of adjustable offset oil pump well |
| 05/01/1990 | US4922423 Position and seal wear indicator for valves and blowout preventers |
| 05/01/1990 | US4921259 Packoff seal with dual member engaging means |
| 05/01/1990 | US4921046 Horizontal hole cleanup tool |
| 05/01/1990 | US4921045 Slip retention mechanism for subterranean well packer |
| 05/01/1990 | US4920811 Mechanical actuator for moving a shaft |
| 04/25/1990 | CN2056443U Double steering automatic positioning flexible graphite stuffing box |
| 04/24/1990 | US4919989 Article for sealing well castings in the earth |
| 04/24/1990 | US4919460 Wellhead casing hanger support mechanism |
| 04/24/1990 | US4919459 Metal-to-metal backseat lockdown screw |
| 04/24/1990 | US4919456 Union for pipe or tree with metal and resilient seals |
| 04/24/1990 | US4919454 Tieback connector with protective landing sleeve |
| 04/24/1990 | US4919210 Subsea wellhead protection system |
| 04/24/1990 | US4919208 Method and apparatus for manipulating tubing in a well |
| 04/24/1990 | US4919203 Methods and apparatus for field blasting of earth formations using inflatable devices for suspending explosives in bore holes |
| 04/19/1990 | WO1990004084A1 Arrangement for protecting components in subsea systems |
| 04/19/1990 | WO1990004083A1 Coupling arrangement for components in subsea structures and a remotely operated tool unit for handling such components |
| 04/17/1990 | US4917195 Quick latch mud mat apparatus |
| 04/17/1990 | US4917190 Oil well blowout containment system |
| 04/17/1990 | US4917188 Method for setting well casing using a resin coated particulate |
| 04/17/1990 | US4917187 Method and apparatus for hydraulically firing a perforating gun below a set packer |
| 04/17/1990 | US4917184 Cement head and plug |
| 04/17/1990 | CA1267836A1 Device and method for effecting provision of an opening in well casing |
| 04/17/1990 | CA1267834A1 Rotatable reciprocating collar for borehole casing and stage cementing apparatus |
| 04/14/1990 | CA2000518A1 Arrangement for protecting components |
| 04/14/1990 | CA2000517A1 Interface arrangement |