| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 04/12/1990 | DE3843969C1 Borehole plug for ground stabilisation in rock |
| 04/11/1990 | CN2055859U High pressure self-seal well sealing device |
| 04/11/1990 | CN2055858U Improved self-seal well sealing device |
| 04/10/1990 | US4915505 Blender apparatus |
| 04/10/1990 | US4915178 Method of inserting a tool into a well under pressure |
| 04/05/1990 | WO1990003491A1 Submerged umbilical connection arrangement |
| 04/04/1990 | CN2055534U Dustfree well cementation working device |
| 04/03/1990 | US4914432 Apparatus for locating a member in a borehole |
| 04/03/1990 | US4913758 Method and apparatus for repairing casings and the like |
| 04/03/1990 | US4913469 Wellhead slip and seal assembly |
| 04/03/1990 | US4913464 Tubular joint with seal |
| 04/03/1990 | US4913238 Floating/tensioned production system with caisson |
| 04/03/1990 | US4913233 Methods of field blasting of earth formations using inflatable devices for suspending explosives in boreholes |
| 04/03/1990 | US4913232 Method of isolating production zones in a well, and apparatus for implementing the method |
| 04/03/1990 | US4913231 Tool for treating subterranean wells |
| 04/03/1990 | US4913228 Dual string tension-set, tension-release well packer |
| 04/03/1990 | US4913227 Equipment for a drill pipe string including a side entry sub, a safety member for anchoring a cable on a support, and a method of using the equipment |
| 04/03/1990 | US4912941 Drilling fracturing, forcing heat-conducting substance into passages, joining supply and return lines |
| 03/28/1990 | EP0360597A1 Pressure limiter for a downhole pump |
| 03/28/1990 | EP0360319A1 Method for placing a body of shape memory material within a cavity |
| 03/28/1990 | CN2055178U Side-opening type self-sealed submerged pump well head assembly |
| 03/28/1990 | CN1040859A Method for placing body of shape memory metal within tubing |
| 03/27/1990 | US4911586 For use on construction sites |
| 03/27/1990 | US4911480 In a well |
| 03/27/1990 | US4911245 Metal seal with soft inlays |
| 03/27/1990 | US4911244 Marine casing suspension apparatus |
| 03/27/1990 | US4911243 Method for disconnecting a marine drilling riser assembly |
| 03/27/1990 | CA1267078A1 Wellhead isolation tool and setting device and method of using same |
| 03/21/1990 | EP0359355A1 Wellhead slip and seal assembly |
| 03/21/1990 | CN2054824U Oil scraping sparging-proof device of sucker rod |
| 03/20/1990 | US4909747 Sealed electrical connector utilizable in a liquid medium |
| 03/20/1990 | US4909546 Tension lock multibowl wellhead |
| 03/20/1990 | US4909323 For a water well |
| 03/14/1990 | EP0357711A1 A method and apparatus for repairing casing and the like |
| 03/13/1990 | US4907812 Bi-directional unsupported area seal |
| 03/13/1990 | US4907651 Metal-to-metal packer seal for downhole disconnectable pipe joint |
| 03/13/1990 | US4907650 Wellhead with safety valve for pumping well |
| 03/13/1990 | US4907649 Restriction subs for setting cement plugs in wells |
| 03/08/1990 | DE3829678C1 Borehole plug |
| 03/06/1990 | US4905958 Blowout preventer |
| 03/06/1990 | US4905764 Protective cover assembly for a well casing and a method of protecting a well casing |
| 03/06/1990 | US4905763 Method for servicing offshore well |
| 03/06/1990 | CA1266431A1 Metal seal for a tubular connection |
| 03/06/1990 | CA1266430A1 Plastic well with plastic well adapter |
| 02/28/1990 | EP0355588A2 Stepwise rotation device for an element especially a screw of a two piece connection part for the coupling of two conduits under water |
| 02/27/1990 | US4903994 Connectors |
| 02/27/1990 | US4903993 Tieback connector with two point interference fit |
| 02/27/1990 | US4903992 Locking ring for oil well tool |
| 02/27/1990 | US4903777 Dual seal packer for corrosive environments |
| 02/27/1990 | US4903776 Casing hanger running tool using string tension |
| 02/27/1990 | US4903774 Annulus shut-off mechanism |
| 02/27/1990 | US4903764 Swivelsub |
| 02/21/1990 | CN1039867A Method and apparatus for packing boreholes absorbent layer |
| 02/20/1990 | US4902170 Sealing annular space, particulate material and alkali silicate solutions |
| 02/20/1990 | US4902045 Connectors |
| 02/20/1990 | US4902044 Well apparatus |
| 02/20/1990 | US4901794 Subterranean well anchoring apparatus |
| 02/20/1990 | CA1265997A1 Subermerged hydroelectric plant for the control of a submarine oilwell plant |
| 02/14/1990 | EP0128206B1 Flow diverter |
| 02/13/1990 | US4900067 Retrievable packoff with an embedded flexible, metallic band |
| 02/13/1990 | US4900041 Subsea well casing hanger packoff system |
| 02/13/1990 | US4899823 Method and apparatus for running coiled tubing in subsea wells |
| 02/13/1990 | US4899822 Apparatus for controlling the operation of an underwater installation |
| 02/13/1990 | US4899819 Method for suspending wells |
| 02/13/1990 | US4899818 Method to improve use of polymers for injectivity profile control in enhanced oil recovery |
| 02/13/1990 | US4899816 Apparatus for guiding wireline |
| 02/07/1990 | EP0353309A1 Method of constructing a well |
| 02/07/1990 | CN1006729B Seal system |
| 02/06/1990 | US4898245 Retrievable well bore tubular member packer arrangement and method |
| 02/06/1990 | US4898243 Liner and drill pipe assembly |
| 02/06/1990 | US4898242 Method for suspending wells |
| 02/06/1990 | US4898239 Retrievable bridge plug |
| 02/06/1990 | US4898236 Drill stem testing system |
| 02/06/1990 | CA1265441A1 Lock for downhole apparatus |
| 02/06/1990 | CA1265440A1 Subsurface injection tool |
| 01/31/1990 | EP0207136B1 Diverter/bop system and method for a bottom supported offshore drilling rig |
| 01/31/1990 | CN1039283A Technology for extracting oil by mechanical discovering and plugging water and pipe column thereof |
| 01/30/1990 | US4897139 Method of producing progressively inflated packers |
| 01/30/1990 | US4896726 Slip stream device |
| 01/30/1990 | US4896724 Method for suspending wells |
| 01/30/1990 | US4896720 Method and system for cleaning well casing |
| 01/25/1990 | WO1990000667A1 Plug for well logging operations |
| 01/23/1990 | USRE33150 Borehole drill pipe continuous side entry or exit apparatus and method |
| 01/23/1990 | US4896367 In well pumping apparatus |
| 01/23/1990 | US4895205 Pipe washer and chemical applicator system |
| 01/23/1990 | US4895185 Expandable hose device |
| 01/17/1990 | EP0350544A1 Blowout preventer testing apparatus |
| 01/16/1990 | US4893842 Wellhead tieback system with locking dogs |
| 01/16/1990 | US4893678 Multiple-set downhole tool and method |
| 01/16/1990 | US4893677 Guidelineless reentry system with retracting rollers |
| 01/10/1990 | EP0349685A1 Annulus valve for concentric tubing hangers |
| 01/09/1990 | US4892149 Method of securing a tubular member within an annular well member, the combined well structure and the tool |
| 01/09/1990 | US4892144 Inflatable tools |
| 01/09/1990 | CA1264290A1 Subsea tubing hanger alignment system |
| 01/09/1990 | CA1264288A1 Production riser footing, and method for its activation |
| 01/03/1990 | EP0349335A2 Plug for a gravel packer |
| 01/02/1990 | US4890927 Cement mixing apparatus |
| 12/28/1989 | DE3921044A1 Elektrischer verbinder mit unter wasser zusammenfuegbaren verbinderteilen Electrical connector with underwater joinable connector Share |
| 12/27/1989 | CN2050070U Bit-fishing unit |
| 12/26/1989 | US4889259 Apparatus for injecting balls into a well |