| Patents for E21B 41 - Equipment or details not covered by groups (7,984) |
|---|
| 05/16/1978 | US4089626 Injector pump |
| 05/09/1978 | US4088191 High pressure jet well cleaning |
| 05/02/1978 | US4086776 Lock means for a tension line |
| 03/21/1978 | US4079998 Lixiviant recirculator for in situ mining |
| 03/07/1978 | US4077777 Neutralization of gases |
| 03/07/1978 | US4077428 Transportable water injection plant |
| 02/21/1978 | US4074540 Tool system for submergible chamber |
| 01/31/1978 | US4071203 Laying of flexible pipe |
| 01/17/1978 | US4068729 Apparatus for multiple wells through a single caisson |
| 12/27/1977 | US4064936 Chemical treating system for oil wells |
| 12/20/1977 | US4063386 Restoration of drilling mud-pits |
| 12/13/1977 | US4062403 Pump-down sand washing tool |
| 12/06/1977 | US4061967 Support system for rotatable detecting element |
| 11/22/1977 | US4059156 Geothermal brine production |
| 11/08/1977 | US4057108 Completing wells in deep reservoirs containing fluids that are hot and corrosive |
| 10/18/1977 | US4054320 Method for the removal of radioactive waste during in-situ leaching of uranium |
| 10/04/1977 | US4051901 Process for water treatment in mobility controlled caustic flooding process |
| 10/04/1977 | US4051686 Platforms resting upon the bed of a body of water |
| 09/13/1977 | US4047579 Sea drilling jig |
| 09/13/1977 | US4047569 Method of successively opening-out and treating productive formations |
| 09/06/1977 | US4046199 Steam injection apparatus and method |
| 08/30/1977 | US4045591 Protecting against corrosion by cleaning, cold working, and coating with a stainless steel |
| 08/23/1977 | US4043150 Safety sleeve |
| 08/16/1977 | US4042033 Combination subsurface safety valve and chemical injector valve |
| 08/16/1977 | US4041719 Method and apparatus for connecting submarine pipelines |
| 08/09/1977 | US4040866 Laundering of oil base mud cuttings |
| 08/09/1977 | US4040486 Method and apparatus for air development and rejuvenation of water wells |
| 08/02/1977 | US4039717 Method for reducing the adherence of crude oil to sucker rods |
| 07/19/1977 | US4036539 Drill string system |
| 07/12/1977 | US4035289 Purifying treatment for effluents of mineral oil drillings |
| 07/05/1977 | US4033410 Monoethanolamine process for sulfur removal from circulating oil used in sour gas wells |
| 06/28/1977 | US4031955 Down hole inhibitor injector |
| 06/21/1977 | US4031544 Television system for use in underwater exploration |
| 06/21/1977 | US4030310 Monopod drilling platform with directional drilling |
| 06/21/1977 | US4030309 Work arm system for submergible chamber |
| 06/14/1977 | US4029034 Method and apparatus for buoyancy control of submergible chambers |
| 05/24/1977 | US4024718 Subsea cable apparatus and method of handling same |
| 05/17/1977 | US4023619 Method of connecting of an undersea central station to a group of undersea wells and outflow pipes |
| 05/10/1977 | US4022281 Method and apparatus for orienting equipment in a well |
| 04/12/1977 | US4016728 Device for severing underwater cables |
| 04/12/1977 | US4016723 Speed measurement system for turbine power plant |
| 04/05/1977 | US4015662 Well tool which changes reciprocating movement to rotary motion |
| 03/29/1977 | US4015234 Apparatus for measuring and for wireless transmission of measured values from a bore hole transmitter to a receiver aboveground |
| 03/22/1977 | US4013123 Hydraulically actuated wire line apparatus |
| 03/15/1977 | USRE29151 Repulsing clays on drill bits |
| 03/15/1977 | US4011995 Burner nozzle assembly |
| 03/08/1977 | US4010798 Method and apparatus for completing underwater well heads |
| 03/08/1977 | US4010619 Remote unmanned work system (RUWS) electromechanical cable system |
| 02/22/1977 | US4008775 Method of using a porous Fe3 O4 drilling mud additive |
| 01/25/1977 | US4004635 Method for connecting a submerged well head to a pipe consisting of steel tubes |
| 01/18/1977 | US4003669 Anti-corrosive insert for sucker rod couplings |
| 01/18/1977 | US4003428 Apparatus and method for underwater pump installation |
| 12/07/1976 | US3995985 Crude oil burner |
| 12/07/1976 | US3995355 Laying of flexible pipe |
| 11/16/1976 | US3991583 Method of providing an underwater enclosure |
| 10/26/1976 | US3987639 Methods and apparatus for installing a drill conductor from an offshore tower |
| 10/19/1976 | US3986558 Petroleum extraction method and assembly |
| 10/05/1976 | US3983937 Method of connection of an undersea well to a flexible outflow pipe |
| 10/05/1976 | US3983708 Methods and apparatus for placing underwater guide lines |
| 09/14/1976 | US3980416 Oil burner for oil-wells |
| 08/24/1976 | US3975941 Oil well rate metering method |
| 08/10/1976 | US3974220 Quaternary ammonium corrosion inhibitor and petroleum demulsifier |
| 08/10/1976 | US3973635 Method and apparatus for offshore drilling operations |
| 07/20/1976 | US3970877 Power generation in underground drilling operations |
| 07/13/1976 | US3968656 Marine structure with hydraulic tensioner |
| 07/06/1976 | US3967680 Method and apparatus for actuating a downhole device carried by a pipe string |
| 07/06/1976 | US3967462 Method and apparatus for joining a subsea pipeline to an offshore platform riser |
| 07/06/1976 | US3967460 Apparatus for use in replacing broken guidelines |
| 06/22/1976 | US3964543 Underwater wellhead completions with portable atmospheric cellar |
| 06/15/1976 | US3962943 Safety apparatus for a cable feed system |
| 06/08/1976 | US3961667 Hydraulically actuated wire line apparatus |
| 06/01/1976 | US3960215 Method and apparatus for performing sequentially timed operations in a well |
| 06/01/1976 | US3959987 Self-engaging and aligning shaft coupling |
| 05/25/1976 | US3958641 Self-decentralized hydra-jet tool |
| 05/18/1976 | US3958049 Method of inspecting and treating sucker rod |
| 05/04/1976 | US3954610 Method and subsurface work chamber for making transparent an underwater cloudy work area |
| 05/04/1976 | US3954137 Sub-sea well re-entry guidance apparatus |
| 04/20/1976 | US3951211 Method for selectively retrieving a plurality of well packers |
| 04/06/1976 | US3949354 Apparatus for transmitting well bore data |
| 04/06/1976 | US3948196 Apparatus for burning fluid at a burner mounted on a floating vessel subject to wave action |
| 03/30/1976 | US3946571 Service module for hostile environment |
| 03/23/1976 | US3945795 Means for preventing damage to jacketed flexible pumping strand |
| 03/16/1976 | US3943725 Apparatus for guiding a load between a surface apparatus and a submerged base platform |
| 02/03/1976 | US3935903 Well tubing protective fluid injection system |