Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 47 - Survey of boreholes or wells
Patents for E21B 47 - Survey of boreholes or wells (31,352)
04/2005
04/20/2005EP1356189A4 Method to evaluate the hydrocarbon potential of sedimentary basins from fluid inclusions
04/20/2005EP1214501B1 Apparatus and method for measuring depth
04/20/2005CN1608273A A coiled tubing inspection system using image pattern recognition
04/20/2005CN1608167A In situ thermal processing of a hydrocarbon containing formation using a natural distributed combustor
04/19/2005US6882937 Downhole referencing techniques in borehole surveying
04/19/2005US6882154 Tracking the positional relationship between a boring tool and one or more buried lines using a composite magnetic signal
04/19/2005US6880647 Chassis for downhole drilling tool
04/19/2005US6880634 Coiled tubing acoustic telemetry system and method
04/19/2005US6880632 Calibration assembly for an interactive swage
04/19/2005US6880402 Deposition monitoring system
04/19/2005CA2428651C Remotely deployable sensor and method
04/14/2005WO2005033907A2 Activity data capture system for a well service vehicle
04/14/2005WO2005033742A1 Multi-pole transmitter source
04/14/2005WO2005033633A2 Apparatus and method for fluid flow measurement with sensor shielding
04/14/2005WO2005033473A1 System and method for correcting errors in depth for measurements made while drilling
04/14/2005WO2005033465A2 Downhole fiber optic acoustic sand detector
04/14/2005US20050079063 Fluid controlled pumping system and method
04/14/2005US20050078555 Method and apparatus for LWD shear velocity measurement
04/14/2005US20050077086 Multiple zone testing system
04/14/2005US20050077085 Tracking positions of personnel, vehicles, and inanimate objects
04/14/2005US20050077084 Make-up control system for tubulars
04/14/2005US20050076528 Depthometer
04/14/2005CA2825499A1 Apparatus and method for fluid flow measurement with sensor shielding
04/14/2005CA2540363A1 Multi-pole transmitter source
04/14/2005CA2539249A1 Apparatus and method for fluid flow measurement with sensor shielding
04/13/2005EP1354118A4 Backreamer
04/13/2005EP1315881A4 Method and system for perforating
04/13/2005CN2692632Y Laser direction apparatus for tunnel
04/13/2005CN2692347Y Fast fixing anti blowing out bypass
04/13/2005CN1605713A Ultrasonic well logging instrument
04/13/2005CN1605709A Down-hole traction apparatus for directional or horizontal well
04/13/2005CN1196914C Sound sensor assembly
04/12/2005US6877558 Apparatus and method for locating joints in coiled tubing operations
04/12/2005US6877557 In-well monitoring and flow control system
04/12/2005US6877332 Downhole sorption cooling and heating in wireline logging and monitoring while drilling
04/12/2005US6877241 Measurement of curvature of a subsurface borehole, and use of such measurement in directional drilling
04/12/2005CA2369574C Choke valve with pressure transmitters
04/12/2005CA2328454C Orienting downhole tools
04/12/2005CA2165645C Resistivity antenna shield, wear band and stabilizer assembly for measuring-while-drilling tool
04/07/2005WO2005031913A2 Antenna system
04/07/2005WO2005031389A2 Obstacle detection for underground operations
04/07/2005WO2005031277A2 Inferential densometer and mass flowmeter
04/07/2005US20050075853 Methods for determining characteristics of earth formations
04/07/2005US20050074196 Gravel pack completion with fiber optic monitoring
04/07/2005US20050073313 Position and orientation locator/monitor
04/07/2005US20050072565 MWD formation tester
04/07/2005US20050072564 Gravel pack completion with fluid loss control fiber optic wet connect
04/06/2005EP1409839B1 Method and apparatus for detonating an explosive charge
04/06/2005EP1305547A4 Data transmission system for a string of downhole components
04/06/2005EP1250514B1 Downhole wireless two-way telemetry system
04/06/2005EP1250513B1 System and method for fluid flow optimization in a gas-lift oil well
04/06/2005EP1194678B1 Data transmission in pipeline systems
04/06/2005CN2690596Y Anti-key dropping tool of radio inclino meter while drilling
04/06/2005CN2690595Y Oil pipe anchoring tubular column of accentric detecting well of oil pumping unit
04/06/2005CN1603576A Real time measuring method and apparatus for horizontal directional drilling
04/05/2005US6874361 Distributed flow properties wellbore measurement system
04/05/2005CA2385376C Drawdown apparatus and method for in-situ analysis of formation fluids
04/05/2005CA2251870C Method and apparatus for measuring volumetric water flow rates in highly inclined wellbores
04/05/2005CA2235341C Producing well artificial lift system control
04/01/2005CA2747368A1 Permanent downhole deployment of optical sensors
03/2005
03/31/2005WO2005028811A1 Atomic clock for downhole applications
03/31/2005US20050071120 Method and apparatus for determining drill string movement mode
03/31/2005US20050070144 Internal coaxial cable seal system
03/31/2005US20050068703 Electromagnetic gap sub assembly
03/31/2005US20050068036 Apparatus and method for wireline imaging in nonconductive muds
03/31/2005US20050068035 Flux orientation locating in a drilling system
03/31/2005US20050067193 Pressure reading tool
03/31/2005US20050067191 Multi-pole transmitter source
03/31/2005US20050067169 Modular weight bar
03/31/2005US20050067166 Erectable arm assembly for use in boreholes
03/31/2005US20050067160 Pulsed-neutron formation density
03/31/2005US20050067005 Thermoacoustic electric power generation
03/31/2005DE102004043151A1 Verfahren und Vorrichtung zum Bestimmen der Geschwindigkeit und von Eigenschaften von strömenden Fluiden unter Verwendung von magnetischen Kernresonanzmessungen Method and apparatus for determining the velocity and of properties of flowing fluids using nuclear magnetic resonance measurements
03/31/2005CA2539105A1 Atomic clock for downhole applications
03/30/2005CN1601049A Automatic downlink system
03/29/2005US6871712 Remote control for a drilling machine
03/29/2005US6871532 Method and apparatus for pore pressure monitoring
03/29/2005US6871410 Autonomous apparatus and method for acquiring borehole deviation data
03/24/2005WO2005026496A1 Hydraulic fracturing
03/24/2005WO2004070159A3 Apparatus and methods for drilling a wellbore using casing
03/24/2005WO2004020776A3 Well treatment apparatus and method
03/24/2005US20050065759 Lumping and delumping method for describing hydrocarbon-containing fluids
03/24/2005US20050062665 Antenna system
03/24/2005US20050061547 Obstacle detection system for underground operations
03/24/2005US20050061513 Monitoring of a reservoir
03/24/2005US20050061061 Inferential densometer and mass flowmeter
03/24/2005DE19713754B4 Bohrlochsonde Borehole probe
03/24/2005CA2539118A1 Hydraulic fracturing
03/23/2005EP1228290A4 Drilling formation tester, apparatus and methods of testing and monitoring status of tester
03/23/2005EP1147283B1 Multilateral well and electrical transmission system
03/23/2005CN2687335Y Dual-packing-cup hanging flow-measuring sealing section
03/23/2005CN2687334Y Dual-packing-cup hanging pressure-measuring sealing section
03/23/2005CN2687333Y Thick oil production measuring well head device
03/23/2005CN1599995A Burst QAM downhole telemetry system
03/22/2005US6868922 Method for measuring digging positions
03/22/2005US6868921 Boring tool tracking fundamentally based on drill string length, pitch and roll
03/22/2005CA2229800C Apparatus and method for performing imaging and downhole operations at work site in wellbores
03/19/2005CA2654524A1 Improving reservoir communication by creating a local underbalance and using treatment fluid
03/17/2005WO2005024182A1 Borehole telemetry system
03/17/2005WO2005024177A1 Downhole power generation and communications apparatus and method
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