| Patents for E21B 29 - Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground (5,744) |
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| 04/07/1993 | CN2129334Y Self-control drip |
| 04/06/1993 | US5199513 Side-tracking mills |
| 04/06/1993 | US5199493 Methods and apparatus for shutting a conduit |
| 03/23/1993 | US5195591 Permanent whipstock and placement method |
| 03/23/1993 | US5195584 Sealing apparatus for repairing breaches in casing |
| 03/17/1993 | EP0507838A4 Polymer and asphalt reaction process and polymer-linked-asphalt product |
| 03/04/1993 | WO1993004312A1 Device for cutting a pipe in order to stop a fluid flow |
| 03/04/1993 | CA2115369A1 Device for cutting a pipe in order to stop a fluid flow |
| 03/03/1993 | EP0528801A1 Pipe bursting and replacement apparatus and method |
| 02/24/1993 | EP0527773A1 Anti-rotation device for use in wellbores |
| 02/23/1993 | US5188190 Method for obtaining cores from a producing well |
| 02/23/1993 | US5188177 Magnetic-pulse sealing of oil-well-head pipe |
| 02/09/1993 | CA1313524C Cutting tool for removing materials from well bore |
| 01/26/1993 | US5181564 Milling tool |
| 01/26/1993 | US5181413 Pipe collapsing attachment |
| 01/21/1993 | DE4124189A1 Extinguishing burning oil well by stopping oil flow through riser - by underground arrangement forced from pit horizontally to cut riser, with cutter forming closure |
| 01/19/1993 | US5179973 Valve with pressure assisted closing system |
| 01/12/1993 | US5178360 Wire cutting valve actuator |
| 01/05/1993 | US5177321 Apparatus for severing tubular members |
| 12/23/1992 | WO1992022352A1 Method and apparatus for closing a wellhead casing |
| 12/23/1992 | EP0519757A1 Downhole tool apparatus |
| 12/17/1992 | DE4114767A1 Oil fire extinguishing assembly e.g. for oil well - has system for repairing extinguished well, contg. bell with mobile rotatable tube, for emptying oil and immediate recovery |
| 12/15/1992 | US5171106 Cutting/expanding tool |
| 12/10/1992 | DE4118481A1 Shut=off appliance for damaged pipes - from which gases, liquids or high-pressure oil-gas mixt. escapes, includes sawing through pipe and diverting fluid flow |
| 12/09/1992 | EP0517343A1 Casing mill and manufacturing method |
| 11/26/1992 | DE4116764A1 Appts. for shutting-off escaping oil, gas and other fluids - using large-bore storing equipment to obliquely bore past damage to form cavity around intact piping, removing cementing and pipe section etc. |
| 11/26/1992 | DE4116473A1 Sealing riser in casing of burning oil or gas prodn. well - by driving access tunnel, boring transverse hole through riser, sealing riser, and fitting stop valve to control resumed flow |
| 11/25/1992 | EP0515004A1 Cutting tool and method for removing materials from well bore |
| 11/25/1992 | CN2122929U Multi-layer casing cutting bullet for neritic oil well |
| 11/24/1992 | US5165478 Downhole activated process and apparatus for providing cathodic protection for a pipe in a wellbore |
| 11/19/1992 | DE4116293A1 Restitution of oil well blowouts - using combination of sleeves to tee into the oil pipe in excavated gallery, allowing fire to be extinguished safety whilst maintaining prodn. |
| 11/19/1992 | DE4115712A1 Sealing and extinguishing oil or natural gas blowouts - comprises dropping concrete or metal cap vertically over blowout to snuff out fires, and uses integral valves to put well head back into prodn. quickly |
| 11/19/1992 | DE4115650A1 Extinguishing burning oil and gas escaping at high pressure - from borehole, by tunnelling for underground access and diverting flow by pipe to safe distance |
| 11/17/1992 | US5163512 Multi-zone open hole completion |
| 11/17/1992 | CA1310261C Method and apparatus for repairing casings and the like |
| 11/10/1992 | US5161617 Directly installed shut-off and diverter valve assembly for flowing oil well with concentric casings |
| 11/05/1992 | DE4114355A1 Shutting down oil well blowouts - using remote controlled bore drill in underground shaft beneath well head to pump pressure countering materials into oil pipe |
| 11/05/1992 | DE4114183A1 Closing crude oil blowouts - using ground based remotely controlled clamps, and trolley running on rails to carry tooling as requested |
| 11/05/1992 | DE4114115A1 Closing down burning crude oil natural gas supply pipes - using slide valve with cutting edges, and providing access to underground pipe by digging shaft, does not use sealants and existing installation can be reused |
| 11/03/1992 | US5159983 Thermite reaction |
| 10/29/1992 | WO1992018800A1 Plumbling apparatus |
| 10/27/1992 | US5158138 Apparatus for shutting in a burning oil well |
| 10/22/1992 | DE4114750A1 Shutting off flow in high pressure pipes remote from danger area or pipe end - uses circular cutter in support housing and shaft and valve, suitable for medium being carried by pipe or oil well probe |
| 10/22/1992 | DE4112344A1 Sealing oil and gas well pipelines and extinguishing fire - by sawing through half pipe cross=section with very thin blade, inserting slide plate |
| 10/22/1992 | DE4112293A1 Closing riser pipe from which oil is escaping from oil well and burning - by driving tunnel to expose pipe below ground so that it is compressed or fitted with sleeve and valve to stop flow |
| 10/21/1992 | EP0509741A1 Tool string shock attenuating apparatus and method |
| 10/20/1992 | US5156212 Method and system for controlling high pressure flow, such as in containment of oil and gas well fires |
| 10/17/1992 | CA2066098A1 Shock attenuating apparatus and method |
| 10/14/1992 | EP0507838A1 Polymer and asphalt reaction process and polymer-linked-asphalt product |
| 10/08/1992 | DE4110450A1 Fire fighting machine for oil source fires - surrounds root of flame radially and smoothers it using bell movable on holder and closable at top by valve |
| 10/07/1992 | CN2118152U Cutter for casing of drilling hole |
| 10/06/1992 | US5153718 Cutting apparatus with viewer |
| 10/01/1992 | WO1992016714A1 Apparatus and method for suppressing an uncontrolled blow-out or fire in an oil well |
| 10/01/1992 | DE4110346A1 Closing down burning oil wells with min. danger to personnel - uses tunnelling and excavating technique to clamp and insert valve remote from oil well head |
| 09/29/1992 | US5150755 Cutting through the walls of a pair of casings |
| 09/15/1992 | US5146989 Apparatus for recovering a wellhead |
| 09/15/1992 | CA1307459C Pipeline servicing tool |
| 08/19/1992 | EP0498990A1 Non-rotating cementing plug for wells |
| 08/19/1992 | CN2113336U Form bullet for underground casing of oil field |
| 08/05/1992 | CN2112001U Oil well casing expander |
| 08/04/1992 | US5135698 Drawing, cooling, expansion, conforming |
| 07/30/1992 | DE4109135C1 Appts. for sealing underground pipelines - comprises pressure tube inserted in bore driven to contact pipeline, is hydraulically or explosively forced against pipe |
| 07/29/1992 | CN2111359U Oil field undergroud casing pipe welding expanding bomb |
| 07/26/1992 | WO1992013170A1 Shear ram apparatus |
| 07/26/1992 | CA2079001A1 Shear ram apparatus |
| 07/22/1992 | CN2110708U Integrated well repairing machinery for drilling oil field |
| 07/15/1992 | CN1017463B Detonation assembly for explosive wellhead severing system |
| 07/14/1992 | US5129322 Explosive tubing cutter and method of assembly |
| 07/08/1992 | EP0493645A1 Cutting/expanding tool |
| 07/08/1992 | CN2109436U Pneumatic oil pipe clamping device |
| 07/07/1992 | US5127482 Expandable milling head for gas well drilling |
| 07/07/1992 | US5127473 Repair of microannuli and cement sheath |
| 06/23/1992 | US5123489 Milling tool and method for removing a packer |
| 06/23/1992 | US5123487 Repairing leaks in casings |
| 06/16/1992 | US5121797 Methods and apparatus for shutting in a burning oil well |
| 06/11/1992 | WO1992009785A1 Device for a down-hole assembly |
| 06/04/1992 | CA2056855A1 Consolidation agent and method |
| 06/02/1992 | US5117911 Shock attenuating apparatus and method |
| 06/02/1992 | US5117909 Prevention gas leakage from oil wells |
| 05/26/1992 | CA1301641C Wireline cutting coupling for well drilling and logging, for extraction and for downhole operations |
| 05/26/1992 | CA1301635C Method of well construction |
| 05/22/1992 | CA2055659A1 Tension-actuated mechanical detonating device useful for detonating downhole explosive |
| 05/19/1992 | US5113948 Oil well fire extinguisher with internal pipe crimper |
| 05/19/1992 | US5113940 Well apparatuses and anti-rotation device for well apparatuses |
| 05/19/1992 | CA1301056C Manual port closing tool for well cementing |
| 05/05/1992 | US5109924 One trip window cutting tool method and apparatus |
| 04/28/1992 | US5107941 Kelly saver drive |
| 04/22/1992 | EP0481767A1 Tubing cutting tool |
| 04/15/1992 | EP0480656A1 Milling tool |
| 04/08/1992 | CN1016203B Well cementing method and manual port closing tool |
| 04/07/1992 | US5101895 Well abandonment system |
| 03/24/1992 | US5098225 Cutting/expanding tool |
| 03/24/1992 | CA1297782C Gravel packing system for a production radial tube |
| 03/17/1992 | US5095980 Non-rotating cementing plug with molded inserts |
| 03/11/1992 | CN1015810B Method for fixing rocklayer of contain minerals in drilling well |
| 03/11/1992 | CN1015808B Method for well drilling |
| 02/25/1992 | US5090480 Underreamer with simultaneously expandable cutter blades and method |
| 02/19/1992 | EP0471588A1 Grapples |
| 02/18/1992 | US5088555 Injecting alkali metal silicate and calcium salt; forming impervious calcium silicate cement |
| 02/12/1992 | EP0269653B1 Apparatus for correcting irregularities in or enlarging an underground duct |