| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
|---|
| 10/24/1978 | US4121345 Linearly corrected articulated linkage for wellbore measuring instrument |
| 10/24/1978 | CA1041007A1 Methods for dtermining velocities and flow rates of fluids flowing in a well bore |
| 10/17/1978 | US4121193 Kelly and kelly cock assembly for hard-wired telemetry system |
| 10/17/1978 | US4120354 Determining the locus of a processing zone in an in situ oil shale retort by pressure monitoring |
| 10/17/1978 | US4120353 Device to move density logging tool against well wall |
| 10/17/1978 | US4120199 Hydrocarbon remote sensing by thermal gradient measurement |
| 10/17/1978 | US4120198 Weight-on-bit measuring apparatus |
| 10/17/1978 | US4120097 Pulse transmitter |
| 10/10/1978 | US4119148 Perforating apparatus and method for well casing |
| 10/03/1978 | US4118148 Downhole well pump control system |
| 10/03/1978 | US4117600 Method and apparatus for providing repeatable wireline depth measurements |
| 10/03/1978 | CA1039831A1 Oil well pumpoff control system utilizing integration timer |
| 09/26/1978 | US4116274 Wireline latching apparatus and method of use |
| 09/26/1978 | US4116044 Packoff leak detector |
| 09/19/1978 | US4114721 Method and system for acoustic noise logging |
| 09/19/1978 | CA1038749A2 Pressure operated isolation valve for use in a well testing and treating apparatus, and its method of operation |
| 09/19/1978 | CA1038748A2 Pressure operated isolation valve for use in a well testing and treating apparatus, and its method of operation |
| 09/12/1978 | US4113036 Laser drilling method and system of fossil fuel recovery |
| 09/12/1978 | CA1038286A1 Well consolidation method |
| 09/05/1978 | US4110912 Triaxial deflection meter |
| 08/29/1978 | US4110688 Method and apparatus for pipe joint locator, counter and displacement calculator |
| 08/29/1978 | US4109717 Method of determining the orientation of hydraulic fractures in the earth |
| 08/29/1978 | US4109521 Method and apparatus for logging inclined earth boreholes using the measured acceleration of the well logging instrument |
| 08/22/1978 | CA1037143A1 Apparatus for detecting high temperature in wells |
| 08/15/1978 | USRE29734 Well bore data-transmission apparatus with debris clearing apparatus |
| 08/15/1978 | US4107644 System and method for digitally transmitting well logging information |
| 08/08/1978 | US4105279 Removable downhole measuring instruments with electrical connection to surface |
| 08/08/1978 | US4105071 Methods and apparatus for determining the stuck point of a conduit in a borehole |
| 08/08/1978 | US4105070 Methods for determining the stuck point of a conduit in a borehole |
| 08/08/1978 | US4104911 Methods and apparatus for determining the stuck point of a conduit in a borehole |
| 07/25/1978 | US4103281 Measuring-while-drilling system having motor speed detection during encoding |
| 07/25/1978 | US4102394 Control unit for oil wells |
| 07/25/1978 | US4102185 Acoustic-nuclear permeability logging system |
| 07/18/1978 | US4100969 Tubing tester valve apparatus |
| 07/11/1978 | US4100528 Measuring-while-drilling method and system having a digital motor control |
| 07/11/1978 | US4099565 Of hydrocarbons from subterranean formations |
| 07/04/1978 | US4098342 Method and apparatus for maintaining electric cable inside drill pipe |
| 06/27/1978 | US4096752 Oil well logging probe assembly |
| 06/27/1978 | US4096737 Underwater wellhead testing |
| 06/13/1978 | US4094360 Self-locking mule shoe |
| 06/06/1978 | US4093936 Logging method and apparatus |
| 05/30/1978 | US4091868 Method of treating oil wells |
| 05/23/1978 | US4090397 Pneumatic transducer for underground burial |
| 05/23/1978 | US4090395 Casing seal and blowout preventer tester and test method |
| 05/02/1978 | US4087781 Electromagnetic lithosphere telemetry system |
| 04/25/1978 | US4085798 Method for investigating the front profile during flooding of formations |
| 04/25/1978 | US4085509 Apparatus for compensating for the heaving of a floating drilling platform for connection with apparatus for measuring the rate of penetration of pipe run into an offshore well |
| 04/11/1978 | US4083117 All angle borehole tool |
| 04/04/1978 | US4082145 Determining the locus of a processing zone in an in situ oil shale retort by sound monitoring |
| 03/21/1978 | US4079784 Method for in situ combustion for enhanced thermal recovery of hydrocarbons from a well and ignition system therefor |
| 03/14/1978 | US4078620 Method of and apparatus for telemetering information from a point in a well borehole to the earth's surface |
| 03/07/1978 | US4078232 Optical analog to digital converter |
| 02/28/1978 | US4077022 Well logging method and means using an armored multiconductor coaxial cable |
| 02/28/1978 | US4076458 Automatic pump speed controller |
| 02/28/1978 | US4076457 Downhole pump speed control |
| 02/21/1978 | US4074756 Apparatus and method for well repair operations |
| 02/14/1978 | US4073341 Acoustically controlled subsurface safety valve system |
| 02/07/1978 | US4072200 Surveying of subterranean magnetic bodies from an adjacent off-vertical borehole |
| 02/07/1978 | US4071959 Gyro-stabilized single-axis platform |
| 01/31/1978 | USRE29526 Directional drilling apparatus |
| 01/31/1978 | US4071757 Detection of behind casing water flow at an angle to the axis of a well borehole |
| 01/31/1978 | US4071756 Radioactive tracers |
| 01/24/1978 | US4069865 Bottom hole fluid pressure communicating probe and locking mandrel |
| 01/24/1978 | US4069591 Elastomeric inclinometer |
| 01/10/1978 | US4067386 Casing collar indicator |
| 01/03/1978 | US4066995 Acoustic isolation for a telemetry system on a drill string |
| 01/03/1978 | US4066994 Well data telemetry by explosions |
| 12/27/1977 | US4065747 Acoustical underwater communication system for command control and data |
| 12/27/1977 | US4064951 Underreamer having cutter arm position indication |
| 12/20/1977 | US4063592 System for logging highly deviated earth boreholes utilizing auxiliary sinker bar assembly |
| 11/22/1977 | US4059008 Method and device for pore pressure sounding |
| 11/15/1977 | US4058757 Well pump-off controller |
| 11/15/1977 | US4058366 Tracer, polysaccharide, hydrolysis to glucose, reaction with o-toluidine |
| 11/08/1977 | US4057781 Well bore communication method |
| 11/08/1977 | US4057780 Method for describing fractures in subterranean earth formations |
| 11/08/1977 | US4057720 Behind casing fluid flow detection in producing wells using gas lift |
| 10/25/1977 | US4055399 Tracers in predetermined concentration ratios |
| 10/11/1977 | US4052903 Pressure sensor |
| 10/04/1977 | US4052703 Intelligent multiplex system for subsurface wells |
| 09/27/1977 | US4051456 Apparatus for establishing and maintaining electric continuity in drill pipe |
| 09/27/1977 | US4051368 Method of measuring horizontal flow speed of fluids in earth formations penetrated by a wellborehole |
| 09/13/1977 | US4047430 Method and apparatus for logging earth boreholes using self-contained logging instrument |
| 09/13/1977 | US4047306 Bore hole probe |
| 09/06/1977 | US4047028 Resolution of through tubing fluid flow and behind casing fluid flow in multiple completion wells |
| 09/06/1977 | US4046220 Method for distinguishing between single-phase gas and single-phase liquid leaks in well casings |
| 09/06/1977 | US4046006 Tubing plug apparatus for performing down-hole pressure tests |
| 08/30/1977 | US4044828 Process for direct measurement of the orientation of hydraulic fractures |
| 08/30/1977 | US4044473 Tilt detector and system |
| 08/30/1977 | US4044470 Collar locating apparatus |
| 08/23/1977 | US4043394 Plugging of abandoned dry wells |
| 08/23/1977 | US4043180 Gathering line leak detection system tester |
| 08/16/1977 | US4042824 Dual spectra well logging system and method |
| 08/16/1977 | US4042046 Directional control mechanism for underground driven pipes and conduits |
| 08/16/1977 | US4041780 Method and apparatus for logging earth boreholes |
| 08/09/1977 | US4040494 Drill director |
| 08/09/1977 | US4040482 Optional fire and release tool and method |
| 08/09/1977 | US4040189 Method and apparatus for leveling an instrument in a well bore |
| 08/02/1977 | US4040003 Downhole seismic source |
| 08/02/1977 | US4040002 Well depth matcher utilizing programmable shifting of well logging data |
| 07/26/1977 | US4038632 Oil and gas well disaster valve control system |