| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 08/24/2004 | US6781520 Motion sensor for noise cancellation in borehole electromagnetic telemetry system |
| 08/24/2004 | US6779605 Downhole tool deployment safety system and methods |
| 08/24/2004 | US6779598 Swivel and eccentric weight to orient a roller sub |
| 08/24/2004 | US6779407 Fluid flow measuring device and method of manufacturing thereof |
| 08/24/2004 | CA2278080C Formation pressure measurement with remote sensors in cased hole |
| 08/21/2004 | CA2740053A1 Side-hole cane waveguide sensor |
| 08/19/2004 | WO2004070167A1 Method and system for the use of a distributed temperature system in a subsea well |
| 08/19/2004 | WO2004070159A2 Apparatus and methods for drilling a wellbore using casing |
| 08/19/2004 | WO2003067018A3 Well system |
| 08/19/2004 | US20040162224 Method of tracking fluids produced from various zones in subterranean well |
| 08/19/2004 | US20040160858 Method and apparatus for determining downhole pressures during a drilling operation |
| 08/19/2004 | US20040160514 Borescope for drilled shaft inspection |
| 08/19/2004 | US20040159444 Method and apparatus to facilitate wet or dry control line connection for the downhole environment |
| 08/19/2004 | US20040159429 Testing a junction of plural bores in a well |
| 08/19/2004 | US20040159428 Acoustical telemetry |
| 08/19/2004 | US20040159149 Sensor apparatus and method of using same |
| 08/19/2004 | US20040158997 Imaging near-borehole structure using directional acoustic-wave measurement |
| 08/19/2004 | DE102004005332A1 Druckimpulsgenerator A pressure pulse generator |
| 08/19/2004 | CA2808302A1 Apparatus and methods for drilling a wellbore using casing |
| 08/18/2004 | EP1197011B1 Power line communication system |
| 08/18/2004 | EP1105621B1 System and method for controlling fluid flow in one or more oil and/or gas wells |
| 08/18/2004 | EP0977931B1 Multizone production monitoring system |
| 08/18/2004 | CN2634115Y Remote sensing type well deep monitor |
| 08/18/2004 | CN2634114Y Micro electrode micro ball focusing hole diameter integrated data logging instrument |
| 08/17/2004 | US6778918 Methods for monitoring fluid front movements in hydrocarbon reservoirs using permanent sensors |
| 08/17/2004 | US6777669 Scale monitor |
| 08/17/2004 | US6776240 Downhole valve |
| 08/17/2004 | US6776233 Method and system for drilling a wellbore having cable based telemetry |
| 08/17/2004 | CA2239416C Method of communicating data through a slickline or other single cable suspension element |
| 08/12/2004 | WO2004068169A1 Downhole process control method utilizing seismic communication |
| 08/12/2004 | WO2004067912A1 Imaging near-borehole structure using directional acoustic-wave measurement |
| 08/12/2004 | WO2004067904A1 Self-orienting selectable locating collet and method for location within a wellbore |
| 08/12/2004 | WO2004067901A1 Data transmission system for a downhole component |
| 08/12/2004 | WO2004051402A3 Data recovery for pulse telemetry using pulse position modulation |
| 08/12/2004 | WO2004046505A3 Bottomhole assembly |
| 08/12/2004 | WO2004005662A3 Method for upward growth of a hydraulic fracture along a well bore sandpacked annulus |
| 08/12/2004 | US20040156265 Pressure pulse generator for downhole tool |
| 08/12/2004 | US20040156264 Downhole telemetry system using discrete multi-tone modulation in a wireless communication medium |
| 08/12/2004 | US20040155794 Downhole telemetry system using discrete multi-tone modulation with adaptive noise cancellation |
| 08/12/2004 | US20040154833 Long range data transmitter for horizontal directional drilling |
| 08/12/2004 | US20040154832 Method and apparatus for controlling wellbore equipment |
| 08/12/2004 | US20040154831 Systems for deep resistivity while drilling for proactive geosteering |
| 08/12/2004 | US20040154390 Downhole sub for instrumentation |
| 08/12/2004 | CA2512567A1 Downhole process control method utilizing seismic communication |
| 08/11/2004 | EP1445419A1 Method and apparatus for controlling wellbore equipment |
| 08/11/2004 | EP0975851A4 Acoustic data link for downhole mwd system |
| 08/11/2004 | CN2632319Y Photoelectric combined logging hoister slip rings |
| 08/10/2004 | CA2299175C Directional coupling sensor for ensuring complete perforation of a wellbore casing |
| 08/05/2004 | WO2004066000A2 System and method for deploying an optical fiber in a well |
| 08/05/2004 | WO2004065754A1 Inventory counter for oil and gas wells |
| 08/05/2004 | WO2004065749A2 Integrated drilling dynamics system and method of operating same |
| 08/05/2004 | WO2003042489A3 Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell |
| 08/05/2004 | US20040150533 Downhole tool adapted for telemetry |
| 08/05/2004 | US20040150532 Method and apparatus for transmitting and receiving data to and from a downhole tool |
| 08/05/2004 | US20040149491 Device and method for improved data transfer |
| 08/05/2004 | US20040149471 Data transmission system for a downhole component |
| 08/05/2004 | US20040149452 Self-orienting selectable locating collet and method for location within a wellbore |
| 08/05/2004 | US20040149436 System and method for automating or metering fluid recovered at a well |
| 08/05/2004 | US20040149434 Monitoring a reservoir in casing drilling operations using a modified tubular |
| 08/05/2004 | US20040149432 Method and system for accessing subterranean deposits from the surface |
| 08/05/2004 | US20040149431 Method and apparatus for a monodiameter wellbore, monodiameter casing and monobore |
| 08/05/2004 | US20040149004 Downhole calibration system for directional sensors |
| 08/05/2004 | CA2513749A1 Inventory counter for oil and gas wells |
| 08/05/2004 | CA2509810A1 System and method for deploying an optical fiber in a well |
| 08/04/2004 | EP1442320A1 Relative drill bit direction measurement |
| 08/04/2004 | EP1269149A4 Method and apparatus for determining fluid viscosity |
| 08/04/2004 | EP1159510B1 Wellbore primary barrier and related systems |
| 08/04/2004 | CN2630496Y Push rod screw of flow-collecting umbrella for water exploring instrument |
| 08/04/2004 | CN2630495Y Oil well impedance moisture content loggig instrument sand-preventing apparatus |
| 08/03/2004 | US6769497 Use of axial accelerometer for estimation of instantaneous ROP downhole for LWD and wireline applications |
| 08/03/2004 | US6769487 Apparatus and method for actively cooling instrumentation in a high temperature environment |
| 08/03/2004 | US6769296 Apparatus and method for measuring formation pressure using a nozzle |
| 08/03/2004 | CA2299176C Method of locating wellbore casing collars using dual-purpose magnet |
| 07/29/2004 | WO2004063835A2 Digital pressure derivative method and program storage device |
| 07/29/2004 | WO2004063743A1 Methods and apparatus for the measurement of hydrogen sulphide and thiols in fluids |
| 07/29/2004 | WO2004063528A1 Data transmission device |
| 07/29/2004 | WO2004042185B1 Downhole cutting locator tool |
| 07/29/2004 | WO2004011761A3 Rupture disc with non-circular varying depth score line |
| 07/29/2004 | US20040145970 Apparatus for receiving downhole acoustic signals |
| 07/29/2004 | US20040145492 Data Transmission Element for Downhole Drilling Components |
| 07/29/2004 | US20040144568 Drilling system with expandable sleeve |
| 07/29/2004 | US20040144533 Method and apparatus for fast pore pressure measurement during drilling operations |
| 07/29/2004 | US20040144530 Toroidal choke inductor for wireless communication and control |
| 07/29/2004 | DE10297122T5 Messung der Krümmung eines Untergrundbohrlochs und Anwendung einer derartigen Messung beim gerichteten Bohren Measuring the curvature of a subterranean well and application of such a measurement when directional drilling |
| 07/29/2004 | CA2512828A1 Digital pressure derivative method and program storage device |
| 07/28/2004 | EP1441105A1 Methods and apparatus for ultrasound velocity measurements in drilling fluids |
| 07/28/2004 | EP0803073B1 Dipmeter processing technique |
| 07/28/2004 | CN2628727Y Coaxle double-protection petroleum logging bridle |
| 07/28/2004 | CN2628726Y Logging cable cleaning lubricating apparatus |
| 07/28/2004 | CN1515785A Equipment and method for defining drilling mode and using optimized formation to make assess measurement |
| 07/28/2004 | CN1159513C Gravtational signal method for remotely controlling track in well and its device |
| 07/27/2004 | US6768700 Method and apparatus for communications in a wellbore |
| 07/27/2004 | US6768307 Flux plane locating in an underground drilling system |
| 07/27/2004 | US6768106 Method of kick detection and cuttings bed buildup detection using a drilling tool |
| 07/27/2004 | US6766855 Apparatus and method for determining the dip of an underground formation in a cased or uncased borehole |
| 07/27/2004 | US6766854 Well-bore sensor apparatus and method |
| 07/27/2004 | US6766703 Apparatus and method for enhancing remote sensor performance and utility |
| 07/27/2004 | CA2190811C Gadolinium compounds for use as oil-soluble tracers |
| 07/22/2004 | WO2004062081A1 Downhole communication system |
| 07/22/2004 | WO2004061269A1 Communication system for down hole use |