| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 03/07/2002 | WO2002018740A1 Improved method for drilling multi-lateral wells with reduced under-reaming and related device |
| 03/07/2002 | WO2002018739A1 Adjustable stabiliser for directional drilling |
| 03/07/2002 | WO2001051760A3 System for automatically drilling and backreaming boreholes |
| 03/07/2002 | DE10132753A1 Horizontal direction drilling machine, uses planetary gear mechanism to keep excavator head rotation speed lower than drive shaft rotation speed |
| 03/06/2002 | CN1080361C Directional boring method and apparatus |
| 03/05/2002 | US6352128 Steered-head ram drilling tool |
| 03/05/2002 | US6352112 Flexible swage |
| 02/28/2002 | WO2002016728A1 Method and device for assembling, particularly for lengthening, a pipe or system of rods |
| 02/28/2002 | US20020023781 Method and apparatus for lateral well drilling utilizing a rotating nozzle |
| 02/28/2002 | US20020023758 Deviated borehole drilling assembly |
| 02/28/2002 | US20020023757 Deviated borehole drilling assembly |
| 02/28/2002 | US20020023756 Deviated borehole drilling assembly |
| 02/28/2002 | US20020023753 Method for drilling multilateral wells with reduced under-reaming and related device |
| 02/28/2002 | US20020023747 Deviated borehole drilling assembly |
| 02/28/2002 | US20020023745 Deviated borehole drilling assembly |
| 02/28/2002 | DE10040261A1 Multi-channel deep drilling system has roller bits in two opposed channels in working positions, bit in waiting position in one channel; new bit can be inserted into channel during drilling |
| 02/27/2002 | EP1181433A1 Drill, drilling method and extraction of hot water |
| 02/27/2002 | EP1181432A1 Method of creating a wellbore |
| 02/27/2002 | CN2479185Y Derrick member of deep drill rig for petroleum geologic prospecting |
| 02/27/2002 | CN1079881C Hydraulic device to be connected in pipe string |
| 02/27/2002 | CN1079880C Process and device for simultaneously drilling and lining hole |
| 02/27/2002 | CN1079879C Drilling device, drilling system and drilling method |
| 02/27/2002 | CN1079878C Method and apparatus for blasting hard rock |
| 02/26/2002 | US6349778 Integrated transmitter surveying while boring entrenching powering device for the continuation of a guided bore hole |
| 02/26/2002 | US6349769 Apparatus and method for establishing branch wells from a parent well |
| 02/26/2002 | US6349768 Method and apparatus for all multilateral well entry |
| 02/26/2002 | CA2181065C Method of creating a borehole in an earth formation |
| 02/21/2002 | WO2002014644A2 Method and device for introducing tools or instruments into earth formations |
| 02/21/2002 | US20020020566 Working tool for a percussion power tool |
| 02/21/2002 | US20020020562 Boring apparatus |
| 02/21/2002 | US20020020561 Real-time control system and method for controlling an underground boring machine |
| 02/21/2002 | US20020020560 Wireline system for multiple direct push tool usage |
| 02/21/2002 | US20020020559 Auger drill directional control system |
| 02/21/2002 | US20020020531 Method and apparatus for cementing branch wells from a parent well |
| 02/20/2002 | CN2477829Y Boss type sucking weight increasing rod |
| 02/20/2002 | CN2477806Y Drilling mounting of petroleum and ore prospecting drilling machine |
| 02/20/2002 | CN2477804Y Side liner-type well completion appts. of branching well |
| 02/20/2002 | CN2477803Y Sliding drill block engineering drilling machine |
| 02/20/2002 | CN1079483C Multiactivating offshore exploration and/or development drilling method and apparatus |
| 02/19/2002 | US6347675 Coiled tubing drilling with supercritical carbon dioxide |
| 02/19/2002 | US6347674 Electrically sequenced tractor |
| 02/19/2002 | CA2108918C Method and apparatus for automatic closed loop drilling system |
| 02/14/2002 | US20020017400 Method for drilling a wellbore using a bi-center drill bit |
| 02/14/2002 | DE10019663C2 Verfahren zur Erkennung der drohenden Überschreitung der zulässigen Belastungswerte von Kunststoff-Rohren Methods for the detection of impending exceeding the allowable loads of plastic pipes |
| 02/13/2002 | EP1179115A1 In-tubing wellbore sidetracking operations |
| 02/07/2002 | WO2002010549A2 Drilling and lining method using a spoolable tubing |
| 02/07/2002 | WO2002010547A1 Directional drilling apparatus with shifting cam |
| 02/07/2002 | WO2001051761A8 Steerable modular drilling assembly |
| 02/07/2002 | US20020014354 Hydraulic in-the-hole percussion rock drill |
| 02/07/2002 | US20020014353 Horizontal boring apparatus |
| 02/07/2002 | US20020014352 Directional boring attachment and method |
| 02/07/2002 | US20020014333 Apparatus for establishing branch wells form a parent well |
| 02/07/2002 | US20020014332 Apparatus for establishing branch wells from a parent well |
| 02/06/2002 | EP0678628B1 Multi-shaft excavating device |
| 02/05/2002 | US6343663 Horizontal boring apparatus |
| 02/05/2002 | US6343655 Method of setting up a production installation |
| 01/31/2002 | WO2002008563A1 Method and device for rotary well drilling |
| 01/31/2002 | WO2001044614B1 Remote lock-out system and method for a horizontal direction drilling system |
| 01/31/2002 | US20020011359 Directional drilling apparatus with shifting cam |
| 01/31/2002 | US20020011358 Steerable drill string |
| 01/31/2002 | US20020011357 Fluid drilling system with drill string and retro jets |
| 01/31/2002 | US20020011355 Method and apparatus for directional boring under mixed conditions |
| 01/31/2002 | DE10034742A1 Werkzeug mit zugeordnetem Schlagwerkzeug Tool with an associated impact tool |
| 01/30/2002 | EP1176283A2 Mobile drilling unit |
| 01/30/2002 | EP1175546A1 Abrasive jet drilling assembly |
| 01/30/2002 | CN1333858A Method and system for accessing substerranean deposits from the surface |
| 01/30/2002 | CN1333112A Cutter with impact tool |
| 01/30/2002 | CN1078652C Stone breaking operating apparatus of construction machinery |
| 01/29/2002 | CA2156982C Torque-resistant, seal setting force-limited, hydraulically settable well packer structure and associated methods |
| 01/29/2002 | CA2085473C Apparatus for feeding a drilling machine in extension rod drilling |
| 01/24/2002 | WO2002006633A1 Remote control for a drilling machine |
| 01/24/2002 | WO2002006630A1 Apparatus and method for maintaining control of a drilling machine |
| 01/24/2002 | WO2002006628A1 Method and apparatus for placing and interrogating downhole sensors |
| 01/24/2002 | WO2001065049A3 Cavitating jet |
| 01/24/2002 | US20020010547 Long range electronic guidance system for locating a discrete in-ground boring device |
| 01/24/2002 | US20020007970 Well system |
| 01/24/2002 | US20020007969 Method and apparatus for directional actuation |
| 01/24/2002 | US20020007968 Method and system for hydraulic friction controlled drilling and completing geopressured wells utilizing concentric drill strings |
| 01/24/2002 | DE10063049A1 Laying buried pipes, e.g. for telecommunication cables, has a main ram and cutter fitted into a start shaft to cut a passage through to the end shaft, with intermediate rams between the pipe sections |
| 01/24/2002 | CA2416111A1 Method and apparatus for placing and interrogating downhole sensors |
| 01/23/2002 | EP1174583A2 Method for drilling a wellbore using a bi-center drill bit |
| 01/23/2002 | EP1174582A2 Drilling apparatus with motor-driven pump steering control |
| 01/23/2002 | EP1174225A1 Percussion tool |
| 01/23/2002 | CN2473326Y Modulating type bias guide tool |
| 01/23/2002 | CN2473325Y Bias guide tool |
| 01/23/2002 | CN1332308A Remote controlled wall bent housing angle changing method and device and the application |
| 01/22/2002 | US6340270 Apparatus and method for the longitudinal splitting of pipes laid underground |
| 01/22/2002 | US6340063 Steerable rotary directional drilling method |
| 01/22/2002 | CA2131456C Downhole tool for controlling the drilling course of a borehole |
| 01/22/2002 | CA2076026C Device for remotely operating an assembly comprising a bean/needle system, and use thereof in a drilling string |
| 01/17/2002 | US20020005297 Underground boring machine employing solid-state inertial navigation control system and method |
| 01/17/2002 | US20020005286 Horizontal directional drilling in wells |
| 01/16/2002 | EP1171946A1 High frequency switch-mode dc powered computer system |
| 01/16/2002 | EP0815345B1 Milling tool, whipstock, milling system and method of forming a window in the wall of a tubular |
| 01/16/2002 | CN1331394A Method for structure duct in ground |
| 01/16/2002 | CN1331376A Gravitational signal method for remotely controlling track in well and its device |
| 01/15/2002 | US6338390 Method and apparatus for drilling a subterranean formation employing drill bit oscillation |
| 01/15/2002 | CA2244451C Multiple string completion apparatus and method |
| 01/10/2002 | WO2002002903A1 Milling of casing using coiled tubing |
| 01/10/2002 | WO2002002900A2 Apparatus and method to complete a multilateral junction |