| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 10/20/1992 | US5155922 Cable length measuring device |
| 10/20/1992 | US5155916 Error reduction in compensation of drill string interference for magnetic survey tools |
| 10/20/1992 | CA1309016C Homogeneous fluoroassay methods employing fluorescent background rejection and water-soluble rare earth metal chelate fluorophores |
| 10/20/1992 | CA1309015C Method and apparatus for analyzing a multi-phase flow in a hydrocarbon well |
| 10/15/1992 | DE4112116A1 Coring drill sand with compressed air feed - has transparent cylinder scaled on outside and seal allowing limited movement |
| 10/14/1992 | EP0508894A1 A method of locally determining the nature of a phase in a three-phase fluid, and application for determining flow parameters of the fluid |
| 10/14/1992 | EP0508728A2 Borehole apparatus control system |
| 10/14/1992 | CN2118815U Micro sound receiver |
| 10/13/1992 | US5155442 Position and orientation locator/monitor |
| 10/13/1992 | US5154078 Kick detection during drilling |
| 10/10/1992 | CA2065613A1 Self-contained downhole gauge system |
| 10/07/1992 | EP0506919A1 Motorized swivel provided with a dynamometric measurement unit. |
| 10/07/1992 | CN2118155U Contrast measuring apparatus for winch of measuring well |
| 10/06/1992 | US5153832 For recording digital information pertinent to samples |
| 10/06/1992 | US5153718 Cutting apparatus with viewer |
| 10/06/1992 | US5152177 Process for the detection and quantitation of corrosion and scale inhibitors in produced well fluids |
| 10/01/1992 | WO1992016720A1 System for measuring excavation position of underground excavator |
| 10/01/1992 | WO1992016719A1 Error reduction in compensation of drill string interference for magnetic survey tools |
| 10/01/1992 | CA2105564A1 Error reduction in compensation of drill string interference for magnetic survey tools |
| 09/30/1992 | CN2117464U Layer-yield profile and pressure sysnchronously surveying column |
| 09/29/1992 | US5151882 Method for deconvolution of non-ideal frequency response of pipe structures to acoustic signals |
| 09/29/1992 | US5151658 Three-dimensional detection system for detecting fractures and their distributions in the earth crust utilizing an artificial magnetic field and magnetic particle tracer |
| 09/29/1992 | US5150750 Device for activating and measuring nonflowing producing wells |
| 09/29/1992 | CA2064279A1 Seismic data method and apparatus |
| 09/23/1992 | EP0505276A1 Probe for determining particularly the injectivity of an oil well and measuring process making use of this probe |
| 09/23/1992 | EP0505261A2 Stand-off compensated formation measurements apparatus and method |
| 09/23/1992 | EP0505260A2 Retrievable radiation source carrier |
| 09/23/1992 | EP0504413A1 Mirror for producing development image of wall of hole in ground and device for producing image |
| 09/23/1992 | CN2116776U Pressure test set under oil well |
| 09/22/1992 | US5150333 Method and apparatus for providing improved pressure pulse characteristics for measuring while drilling |
| 09/22/1992 | US5148880 Apparatus for drilling a horizontal controlled borehole in the earth |
| 09/22/1992 | US5148699 Stuffing box leak detector |
| 09/21/1992 | CA2063509A1 Probe to specifically determine the injectivity of a petroleum well and measuring method implementing said probe |
| 09/17/1992 | WO1992015772A1 Device for measuring drilling mast swivel movement |
| 09/17/1992 | WO1992015768A1 Method of checking that an oil well safety valve is operating correctly |
| 09/16/1992 | EP0504008A1 Method and device for the installation of a probe against the wall of a cased borehole |
| 09/16/1992 | CN2116086U Tester for sand prevention well oil bed section |
| 09/15/1992 | US5148408 Acoustic data transmission method |
| 09/15/1992 | US5148017 Apparatus for detecting changes of length in a medium employing different fiber length |
| 09/15/1992 | US5148001 System and method of short circuiting arc welding |
| 09/15/1992 | CA1307456C Surface read-out tester valve and probe |
| 09/15/1992 | CA1307455C Locking orientation sub and alignment housing for drill pipe conveyed logging system |
| 09/10/1992 | DE4107678A1 Annular tooth load sensor for roller tunnelling tool - has measuring points and evaluator on drill head, with measuring points fitted with magnetic field sensors |
| 09/10/1992 | DE4107676A1 Roller tunnelling tool monitoring axle load measurement - forms load independent of over-roll signal from strain gauges, recessed into axle at measurement point under rollers |
| 09/10/1992 | DE4107537A1 Earth sample extractor using probe with cylindrical pipe sleeve - having handling section at top and exchangeable tip at base |
| 09/09/1992 | EP0502757A1 Method for characterizing the texture heterogeneities of geological formations traversed by a borehole |
| 09/09/1992 | CN2115403U No-cable type horizontal drilling trace logging instrument |
| 09/08/1992 | US5146433 Mud pump noise cancellation system and method |
| 09/08/1992 | CA1307359C Method and apparatus for locating wet cement plugs in open bore holes |
| 09/08/1992 | CA1307197C Piezometer actuator device and method for its installation in a borehole |
| 09/03/1992 | WO1992014908A1 Method for automatically monitoring the vibrational condition of a drill string |
| 09/03/1992 | WO1992014905A2 Device for the precise directional control of capping bores |
| 09/02/1992 | EP0501051A1 Dual frequency microwave water cut monitoring means and method |
| 09/02/1992 | EP0500709A1 Pipe system with electrical conductors. |
| 09/02/1992 | CN1064129A Mechanical protector of logging instrument for horizontal well |
| 09/02/1992 | CN1018076B Drill pipes and castings utilizing multi-conduit tubulars |
| 09/01/1992 | US5144298 Dynamometric measuring assembly for a drill pipe equipped with means of radiotransmission |
| 09/01/1992 | US5144126 Apparatus for nuclear logging employing sub wall mounted detectors and electronics, and modular connector assemblies |
| 09/01/1992 | US5143158 Subsea wellhead apparatus |
| 08/26/1992 | EP0499635A1 Method for acoustically transmitting well drilling data |
| 08/25/1992 | US5142472 Method of measuring the resistivity and thickness of a thin underground layer using induction logging |
| 08/25/1992 | US5142471 Method for determining the pressure or stress of a geological formation from acoustic measurement |
| 08/25/1992 | US5142180 Direct current motor for operation at elevated temperatures in a hostile environment |
| 08/25/1992 | US5141062 Tool actuator |
| 08/25/1992 | US5141061 Method and equipment for drilling control by vibration analysis |
| 08/25/1992 | US5141060 Method for optimizing of stabilizer positioning in a bottomhole assembly to eliminate the effects of borehole inclination |
| 08/20/1992 | WO1992014033A1 Down hole camera assembly |
| 08/20/1992 | WO1992014029A1 Apparatus for carrying out subsea wireline operations |
| 08/20/1992 | WO1992014027A1 System for controlled drilling of boreholes along planned profile |
| 08/20/1992 | DE4104992A1 Vorrichtung zur zielgenauen steuerung von ueberlagerungsbohrungen A device for targeted control of about storage holes |
| 08/19/1992 | EP0498876A1 Method for determining the rotational speed of a drill bit. |
| 08/19/1992 | EP0353275B1 Shut-in tool |
| 08/19/1992 | CN2113340U Sliding bush type pin-break mechanism for drilling clinometer |
| 08/19/1992 | CN1017940B System for transmission of signals between reception assembly lowered into well and central and recording laboratory |
| 08/19/1992 | CN1017915B Method of using acoustic wave to evaluate cement-bond well quality in all its aspests |
| 08/18/1992 | US5140319 Video logging system having remote power source |
| 08/18/1992 | US5140318 Data transmission system for downhole logging tools |
| 08/18/1992 | US5138877 Method and apparatus for intersecting a blowout well from a relief well |
| 08/18/1992 | US5138876 Method and apparatus for measuring steam profiles in steam injection wells |
| 08/18/1992 | US5138875 Method of monitoring the drilling of a borehole |
| 08/12/1992 | CN2112686U Magnetic signal marking instrument for well measuring cable depth |
| 08/11/1992 | US5138585 Method for fluid identification and evaluation within wellbores using ultrasonic scanning |
| 08/11/1992 | US5138313 Electrically insulative gap sub assembly for tubular goods |
| 08/11/1992 | CA1306186C Casing hanger and packoff running tool |
| 08/06/1992 | WO1992013174A1 Improvements in remote sensing |
| 08/06/1992 | WO1992013173A1 Device for the generation of an absolute, location-independent reference direction |
| 08/06/1992 | WO1992013167A1 Method and apparatus for preventing drilling of a new well into an existing well |
| 08/05/1992 | EP0497405A1 Steerable drill head |
| 08/05/1992 | CN1063334A Well-temperature measuring installation of steam-driven observation well |
| 08/05/1992 | CN1017739B Method for determining azimuth of borehole |
| 08/05/1992 | CN1017738B Auto anti-bounce circuit system for micro-computer sound velocity logging |
| 08/04/1992 | US5136525 Method and apparatus for carrying out borehole temperature measurements |
| 08/04/1992 | CA1305856C2 Well bore measurement tool |
| 08/01/1992 | WO1992014342A1 Method and apparatus for viewing a bore hole |
| 08/01/1992 | WO1992014034A1 Optic system for a down hole camera assembly |
| 08/01/1992 | CA2101748A1 Optic system for a down hole camera assembly |
| 08/01/1992 | CA2101747A1 Method and apparatus for viewing a bore hole |
| 07/29/1992 | CN1017639B Automatic multiparameter recorder for geology of well drilling |
| 07/29/1992 | CA2060091A1 Controllable drill head |
| 07/28/1992 | US5134471 System for monitoring the walls of a borehole using a video camera |