| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 03/02/2000 | WO2000011304A1 Reverse circulation drilling system with bit locked underreamer arms |
| 03/02/2000 | WO2000011303A1 Apparatus for directional drilling |
| 03/02/2000 | WO2000011302A1 Device for drilling or draining holes in soil or rock |
| 03/02/2000 | CA2338579A1 Reverse circulation drilling system with bit locked underreamer arms |
| 03/01/2000 | CN1049945C Construction method for big diam deep-well |
| 02/29/2000 | US6029757 Casing hammer assembly for cable tool drilling apparatus |
| 02/29/2000 | US6029747 Through-tubing lateral re-entry |
| 02/28/2000 | CA2246040A1 Lateral jet drilling system |
| 02/24/2000 | WO2000009857A1 Method and apparatus for exploration drilling |
| 02/24/2000 | WO2000009852A1 Bottom-supported guidance device for alignment of multiple wellbores in a single conductor |
| 02/24/2000 | WO2000008911A1 Motorized auger |
| 02/24/2000 | DE19802691C1 Salvage method for cables, leads or other comparable elongated units from ground |
| 02/23/2000 | EP0981007A1 Method of installing replacement pipe |
| 02/23/2000 | EP0980461A2 Directional drilling apparatus |
| 02/23/2000 | EP0817936B1 Process and device for pulling a pipe laid or to be laid in the ground |
| 02/23/2000 | EP0702746B1 System for in situ replacement of cutting means for a ground drill |
| 02/22/2000 | US6028534 Formation data sensing with deployed remote sensors during well drilling |
| 02/17/2000 | WO2000008295A1 An apparatus and method for killing a subsea well |
| 02/17/2000 | WO2000008294A1 Whipstock |
| 02/17/2000 | WO1998050667A8 Directional drilling apparatus |
| 02/16/2000 | EP0979921A1 Method for installing an oil production installation |
| 02/16/2000 | EP0979920A2 Drill apparatus with twin impact system |
| 02/16/2000 | CN2364197Y Super-short radius radial well direction changer |
| 02/15/2000 | US6024169 Method for window formation in wellbore tubulars |
| 02/15/2000 | US6024168 Wellborne mills & methods |
| 02/12/2000 | CA2268400A1 "twin-impact" double-blow drilling apparatus |
| 02/10/2000 | DE19927240A1 Erfassung von unterirdischen Objekten Detection of buried objects |
| 02/10/2000 | DE19901497C1 Driving method for underground pipe line has the butting pipe sections fitted with jointing sleeves to provide flexibility for the line and with a final jointing process to link then pipe sections |
| 02/09/2000 | EP0978626A1 Method of constructing a tunnel lined with a tubing element |
| 02/09/2000 | CN1049272C Sealing shaft sinking method |
| 02/08/2000 | USRE36556 Method and apparatus for drilling bore holes under pressure |
| 02/03/2000 | WO1999060244A9 Multiple lateral hydraulic drilling apparatus and method |
| 02/01/2000 | US6021377 Drilling system utilizing downhole dysfunctions for determining corrective actions and simulating drilling conditions |
| 02/01/2000 | US6019173 Multilateral whipstock and tools for installing and retrieving |
| 02/01/2000 | CA2030024C Hydraulic drilling apparatus and method |
| 01/28/2000 | CA2279148A1 Modular mobile drilling system and method of use |
| 01/27/2000 | WO2000004314A1 Method and device for laying an underground duct made of a plastic material |
| 01/27/2000 | WO2000004270A1 Supplementary borehole drilling |
| 01/27/2000 | WO2000004269A2 Subsea wellbore drilling system for reducing bottom hole pressure |
| 01/27/2000 | WO2000003600A2 Improved tubing handling for subsea oilfield tubing operations |
| 01/26/2000 | EP0973992A1 Subsurface probe system for chemical and mineral exploration |
| 01/26/2000 | EP0840834A4 Apparatus and process for drilling and completing multiple wells |
| 01/26/2000 | EP0759117B1 Device for driving a tunnel or drain pipe |
| 01/26/2000 | CN2360581Y Floating backward appts of underground piercing mill |
| 01/25/2000 | USRE36526 Retrievable through tubing tool and method |
| 01/20/2000 | WO2000003115A1 Boring device |
| 01/20/2000 | DE19831661A1 Recovery of jammed drill strings, in which tool including cutters separates drill pipe permitting expansive sections to grip interior, for extraction by existing surface equipment |
| 01/19/2000 | EP0851966A4 System for selective re-entry to completed laterals |
| 01/18/2000 | US6015112 Arrangement for leading flexible elements to a rock drill, and a hose reel structure |
| 01/18/2000 | US6015012 In-situ polymerization method and apparatus to seal a junction between a lateral and a main wellbore |
| 01/18/2000 | CA2006935C Remote control device for equipment with needle valve system |
| 01/13/2000 | WO2000001921A1 Milling system for forming a window in the wall of a tubular |
| 01/13/2000 | DE19831009A1 Bohrvorrichtung Drilling device |
| 01/11/2000 | US6012536 Method for steering a ground-drilling machine |
| 01/11/2000 | US6012527 Method and apparatus for drilling and re-entering multiple lateral branched in a well |
| 01/11/2000 | US6012526 Method for sealing the junctions in multilateral wells |
| 01/11/2000 | US6012516 Deviated borehole drilling assembly |
| 01/11/2000 | CA2162794C Method and apparatus for producing a well |
| 01/05/2000 | EP0969155A2 Process of replacement of subterranean pipes |
| 01/05/2000 | EP0846216B1 Multi-linked working boom for working machine |
| 01/05/2000 | DE19853198C1 Replacement of underground pipes of different diameter without digging, with optional expansion to greater conducting cross-sections |
| 01/05/2000 | CN2357120Y Creepage extension type drilling rig |
| 01/04/2000 | US6009957 Arrangement in a feed beam of a rock drill |
| 01/04/2000 | US6009949 Apparatus and methods for sealing a wellbore junction |
| 12/30/1999 | DE19824503C1 Method of comparative measurement of pilot tube drive direction towards target for laying pipe connections |
| 12/29/1999 | EP0777814B1 Arrangement for controlling boom for rock drilling unit |
| 12/29/1999 | CN2356137Y Drilling device for central hole enlarging sleeve follow-up down-the-hole hammer drill |
| 12/29/1999 | CA2276786A1 Drill boom support for a drill rig |
| 12/29/1999 | CA2276220A1 Drill rig |
| 12/26/1999 | CA2267019A1 An undersea drilling template |
| 12/23/1999 | WO1999066168A1 Method of and apparatus for horizontal well drilling |
| 12/23/1999 | DE19825582A1 Method for laying underground pipeline from access pit |
| 12/22/1999 | EP0964978A1 Hydrostatic penetration device and tool for the same |
| 12/22/1999 | EP0837978B1 Single trip whipstock assembly |
| 12/22/1999 | EP0819205B1 A surface controlled wellbore directional steering tool |
| 12/22/1999 | CN2355092Y Hydraulic impulsive pressurizer for drill |
| 12/22/1999 | CN1239531A Deformed multiple well template and process of use |
| 12/21/1999 | US6004073 Double walled pipe, jacking method and pipe end structure of leading pipe |
| 12/21/1999 | US6003621 Methods and apparatus for drilling holes laterally from a well |
| 12/21/1999 | US6003601 Methods of completing a subterranean well and associated apparatus |
| 12/16/1999 | WO1999064715A1 Downhole milling device |
| 12/16/1999 | WO1999064713A1 A drilling tool |
| 12/16/1999 | WO1999064712A1 Directional drilling system and apparatus |
| 12/16/1999 | CA2334150A1 Downhole milling device |
| 12/15/1999 | EP0964133A1 Transmitter housing |
| 12/15/1999 | CN1238824A System, vessel, seabed installation and method for producing oil or gas |
| 12/14/1999 | US6000479 Slimhole drill system |
| 12/09/1999 | WO1999051850A3 Underground cable and pipelaying |
| 12/09/1999 | DE19823629A1 Gehäuse zur Senderaufnahme Housing for receiving stations |
| 12/08/1999 | EP0962596A1 Pile and method for installing same |
| 12/08/1999 | EP0961867A1 Structure for the production of oil and/or gas at sea |
| 12/07/1999 | US5997215 Process and device for pulling a pipe laid or to be laid in the ground |
| 12/07/1999 | US5996712 Mechanical locking swivel apparatus |
| 12/07/1999 | US5996711 Method and apparatus for locating indexing systems in a cased well and conducting multilateral branch operations |
| 12/07/1999 | US5996709 Projectile assisted drill for seismic operations |
| 12/07/1999 | CA2070684C Drill bit for well slashing |
| 12/02/1999 | WO1999061748A1 Boom arrangement for rock drilling apparatus |
| 12/01/1999 | EP0961008A2 Apparatus and method for drilling and completing a deviated borehole |
| 12/01/1999 | EP0961007A2 Expandable wellbore junction |
| 12/01/1999 | EP0960261A1 Tool and method for drilling a lateral well |