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)
08/1998
08/12/1998EP0857249A2 Closed loop drilling system
08/12/1998EP0800614B1 Downhole electricity transmission system
08/12/1998CN1190150A Drill bit for horizontal directional drilling of rock formations
08/12/1998CN1190149A Method for horizontal directional drilling of rock formations
08/06/1998WO1998034007A1 Tool and method for drilling a lateral well
08/05/1998EP0558534B1 Well completion system
08/04/1998US5790185 For inspecting the inside of a borehole or pipeline
08/04/1998US5789663 Porous medium test with tracer recharging and discharging through a single well
08/04/1998US5787997 Method of qualifying a borehole survey
08/04/1998US5787978 Multi-face whipstock with sacrificial face element
07/1998
07/28/1998US5787052 Snap action rotary pulser
07/28/1998US5785120 Tubular patch
07/23/1998WO1998012418A3 Autonomous downhole oilfield tool
07/23/1998EP0862682A3 Autonomous downhole oilfield tool
07/22/1998EP0853754A1 Method and measuring device for measuring hydrostatic pressure, in particular that of ground water
07/21/1998US5784004 Apparatuses and systems for reducing power consumption in remote sensing applications
07/21/1998US5783822 Traceable well cement compositions and methods
07/21/1998US5782770 Hyperspectral imaging methods and apparatus for non-invasive diagnosis of tissue for cancer
07/16/1998WO1998017894A3 Drilling system with integrated bottom hole assembly
07/15/1998EP0852653A1 Method and apparatus for selective horizontal well re-entry using retrievable diverter oriented by logging means
07/15/1998EP0852652A1 Method for isolating multi-lateral well completions while maintaining selective drainhole re-entry access
07/15/1998CN1187682A Adjoint alpha neutron tube for logging
07/07/1998US5777278 Method to identify fluid hydrocarbon flow rates in a fluid flow line
07/07/1998US5775422 Tree test plug
07/02/1998WO1998028890A1 An apparatus, system and method to transmit and display acquired well data in near real time at a remote location
07/01/1998EP0850348A1 Borehole surveying
06/1998
06/30/1998US5774420 Method and apparatus for retrieving logging data from a downhole logging tool
06/25/1998WO1998005848A3 Method and apparatus for the downhole metering and control of fluids produced from wells
06/23/1998US5769558 Flex joint
06/23/1998US5769163 Adjustable flexibility anchor device with retractable arms for well tools
06/17/1998EP0848512A2 Method of and system for communication between points along a fluid flow
06/17/1998CN2284298Y Self-floating logging instrument carrier
06/16/1998US5767680 Method for sensing and estimating the shape and location of oil-water interfaces in a well
06/16/1998US5767678 In a technique for locating a boring tool
06/16/1998US5767400 Hydraulic test system mounted with borehole television set for simultaneous observation in front and lateral directions
06/16/1998US5765640 Multipurpose tool
06/11/1998CA2224464A1 Method of and system for communication between points along a fluid flow
06/10/1998EP0846841A2 Apparatus and method for determining boring direction when boring underground
06/10/1998EP0846840A2 Video inspection or logging tool
06/10/1998EP0846834A2 Boring ram with path control
06/10/1998CN2283730Y Current collector capable of drawed ring-cavity logging instrument
06/10/1998CN2283729Y Cover tyre of current collector of over-ring water-exploration instrument
06/10/1998CN2283728Y Underground totally-enclosed well testing instrument
06/09/1998US5764062 Technique for establishing and recording a boring tool path using a survey reference level
06/09/1998US5763773 To evaluate quality of a cement seal in an annulus
06/04/1998WO1998023931A1 Gas flow rate measurement
06/04/1998WO1998023849A1 Borehole data transmission system
06/04/1998CA2223311A1 Percussion boring machine with run monitoring
06/03/1998CN2283238Y Flow detector
06/03/1998CN2283129Y Injector for polymer injection profile logging tracer
06/02/1998US5758539 Logging method and system for measuring mechanical parameters of the formations crossed through by a borehole
05/1998
05/28/1998WO1998022689A2 Whipstock
05/27/1998EP0844366A1 Reinforced elastomeric bag for use with electric submergible motor protectors
05/26/1998US5757190 System including an arrangement for tracking the positional relationship between a boring tool and one or more buried lines and method
05/26/1998CA2221435A1 One-trip whipstock setting and squeezing method
05/26/1998CA2191262A1 Marsh case
05/22/1998WO1998021448A1 Method of correcting wellbore magnetometer errors
05/22/1998WO1998021444A2 Apparatus and method for expanding a liner patch; a stroke indicator; and a tubular patch
05/20/1998EP0597898B1 Tubing test valve
05/20/1998CN2282068Y Multiple effect pressure tester
05/20/1998CN2282067Y Multiple parameter water absorption section downhole instrument for logging
05/19/1998US5754495 Method for acoustic determination of the length of a fluid conduit
05/19/1998US5753813 Apparatus and method for monitoring formation compaction with improved accuracy
05/19/1998US5753812 Transducer for sonic logging-while-drilling
05/19/1998US5752320 Borehole dip instrument
05/13/1998EP0841465A1 Drill verticality measuring device
05/13/1998CN1181451A Multifunctional full-path ground directly-reading tester
05/12/1998USRE35790 System for drilling deviated boreholes
05/12/1998US5751895 Selective excitation of heating electrodes for oil wells
05/12/1998US5749417 Production log
05/07/1998DE19749464A1 Determination of deviation from vertical of sunken slit, shaft, bore hole, sealing wall
05/07/1998DE19645103A1 Temperature probe having radially spring-loaded sensor unit for borehole measurements
05/05/1998US5748471 Well collar identification method
05/05/1998CA2115306C Borescope drill pipe and light guide sleeve
04/1998
04/30/1998WO1998017894A2 Drilling system with integrated bottom hole assembly
04/30/1998WO1998017891A1 Method of longitudinally splitting a pipe coupling within a wellbore
04/29/1998CN2280155Y Graduation checking tool of sound wave well surveying instrument
04/28/1998US5745047 Downhole electricity transmission system
04/28/1998US5743642 Method for compensating earth surface temperatures for the skyward effect thereon
04/23/1998WO1998016720A1 Constant bottom contact thruster
04/23/1998WO1998016712A1 Apparatus and method for drilling boreholes
04/23/1998DE19745947A1 Vorrichtung und Verfahren zum Bohren von Erdformationen Apparatus and method for drilling earth formations
04/23/1998CA2218209A1 Method for determining resistivity derived porosity and porosity derived resistivity
04/22/1998EP0837217A2 Downhole tool
04/22/1998EP0836670A2 Method and system for logging mechanical parameters of formations crossed through by a borehole
04/22/1998EP0836667A1 Locating a discrete in-ground boring device
04/22/1998CN2279443Y Wellhead acoustical generator
04/22/1998CN1179500A Microphone
04/21/1998US5741978 Method for determination of flow rate in a fluid
04/21/1998US5741971 Method for analyzing physical properties of materials
04/21/1998US5741967 Method for determining optimum horizontal drilling direction and drilling horizon
04/21/1998US5740864 Method of placement of a whipstock in a wellbore
04/21/1998US5740863 Subsea wellhead mechanical erosion detector
04/21/1998US5740861 Replaceable consumable erosion detector
04/21/1998US5740860 Side pocket mandrel for a measuring instrument
04/16/1998WO1998015850A1 Method of obtaining improved geophysical information about earth formations
04/16/1998WO1998015801A1 Method for controlling the speed of a pump based on measurement of the fluid depth in a well
04/16/1998WO1998007049A3 Reservoir acquisition system with concentrator
04/15/1998CN2278769Y Connection separation mechanism for memory electronic logging instrument
04/15/1998CN2278768Y Auto-controllable rubber ball collector
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