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| Number | Title | Issue Date |
| 5605192 | Means and method to displace a logging tool to the bottom of a well for withdrawal through the well A device and method for displacing a logging tool to the bottom of a well. The lower end of the logging g tool is connected with an upper member which is releasably connected with a plug being displaced along the well. A lower member is releasably connect... | 02/25/1997 |
| 5560437 | Telemetry method for cable-drilled boreholes and method for carrying it out A telemetry system for obtaining loggings by an independently guiding logging probe provided with a sensor includes the logging probe ejected in a drill string, so that the sensor projecting through a drill bit of the drill string has an access to the bot... | 10/01/1996 |
| 5495755 | Slick line system with real-time surface display An apparatus and method is provided whereby a small diameter, single conductor wireline is combined with standard slick line equipment to obtain "real-time" surface display from well logging tools. A helically formed, insulated conductor coextending withi... | 03/05/1996 |
| 5469736 | Apparatus and method for measuring a borehole An apparatus and a method are provided for measuring the caliper of a borehole, and the standoff of a drilling tool from the walls of a borehole during a drilling operation. The apparatus includes three or more sensors, such as acoustic transducers arrang... | 11/28/1995 |
| 5443119 | Method for controlling sand production from a hydrocarbon producing reservoir In a hydrocarbon-producing well penetrating an unconsolidated hydrocarbon reservoir, the azimuthal direction of the maximum in-situ horizontal compressive stress within the reservoir having non-uniform horizontal tectonic stresses surrounding the well is ... | 08/22/1995 |
| 5438169 | Apparatus and method for determining the quality of clamping of a borehole seismic sensor system to the wall of a wellbore The invention is a method and apparatus for measuring the quality of acoustic coupling between a wellbore wall and a borehole seismic sensor system. The system includes the steps of positioning the system at a desired depth in the wellbore and activating ... | 08/01/1995 |
| 5402392 | Determining orientation of vertical fractures with well logging tools The orientation of vertical fractures in subsurface rock formations is determined. A cross-dipole logging tool collects four-component shear-wave seismic data through a formation interval of interest in a subsurface formation adjacent a well bore. A gyros... | 03/28/1995 |
| 5372038 | Probe to specifically determine the injectivity or productivity of a petroleum well and measuring method implementing said probe Conventional injection tests conducted on petroleum operating wells are effected by measuring the hydraulic characteristic quantities of the fluid injected into the well (mainly pressure, temperature, flowrate). The present invention adds microseismic mea... | 12/13/1994 |
| 5363094 | Stationary system for the active and/or passive monitoring of an underground deposit Monitoring of an underground effluent deposit (2) and the exploration thereof are performed by installing various devices or user modules : reception arrays (Ri, Rj, Rk) such as geophones or hydrophones, condition sensors (C1, C2) , tools requiring electr... | 11/08/1994 |
| 5361838 | Slick line casing and tubing joint locator apparatus and associated methods An electromechanical detector structure is used to sense and log the joints in a downhole jointed tubular structure, such as a well bore casing or production tubing, in a subterranean well. The detector is lowered into the tubular structure on an elongate... | 11/08/1994 |
| 5361632 | Method and apparatus for determining multiphase holdup fractions using a gradiomanometer and a densitometer A method and apparatus determines three phase holdup fractions and flow rates for the individual phases of a fluid flowing in a well. A logging tool comprising a temperature compensated gradiomanometer having a differential pressure detector comprised of ... | 11/08/1994 |
| 5279366 | Method for wireline operation depth control in cased wells Wireline operation depth control in cased wells can be substantially improved by attaching a combined magnetic and radioactive marker to the casing in the vicinity of the zone of interest. A cased hole log is then performed, such as a perforation depth co... | 01/18/1994 |
| 5247829 | Method for individually characterizing the layers of a hydrocarbon subsurface reservoir The invention relates to reservoir evaluation and is more specifically directed to a method of characterizing the individual response of a layer of a multi-layer hydrocarbon reservoir traversed by a well, based on downhole flow rate and pressure measureme... | 09/28/1993 |
| 5242020 | Method for deploying extendable arm for formation evaluation MWD tool An extending arm is incorporated into a formation evaluation MWD collar or sub for extending outwardly from the tool and maintaining direct and continuous contact with the borehole wall (e.g., formation). In accordance with this invention, a method is pre... | 09/07/1993 |
| 5217072 | Device for carrying out interventions in nonflowing deflected producing wells The device comprises an intervention tool consisting for example of a pumping assembly (6) and a measuring assembly (8) which are associated with a tubing (7) and taken down into a well. The connection between at least one of the two assemblies and a surf... | 06/08/1993 |
| 5180011 | Method and device for carrying out measuring operations of interventions in a well Measuring operations can for example be carried out in wells (1) where the progress of an intervention tool (3) is difficult (deflected wells for example) by means of a tubing (2), a support frame (5) linked with the tool and which can be anchored in the ... | 01/19/1993 |
| 5159978 | Connecting apparatus for logging tools including electrical feedthrough and isolation system with bridle assembly A rigid bridle for supporting a current emitting logging tool in a sonde is set forth. The rigid bridle is formed of multiple segments of tubular members, normally formed of metal. At selected locations along the length thereof, they are interrupted by el... | 11/03/1992 |
| 5151658 | Three-dimensional detection system for detecting fractures and their distributions in the earth crust utilizing an artificial magnetic field and magnetic particle tracer A three-dimensional detection system for detecting fractures and their distributions in the earth crust utilizing an artificial magnetic field which comprises: a magnetic particle tracer being injected into the fractures of the earth crust, having high ma... | 09/29/1992 |
| 5044437 | Method and device for performing perforating operations in a well A method and device for perforating a wall of a well by use of a tool such as an explosive gun includes the use of an intervention set. This set has a perforating tool associated with a measuring box such as a logging sonde and temperature and pressure se... | 09/03/1991 |
| 5010527 | Method for determining the depth of a hydraulic fracture zone in the earth The depth of a hydraulic fracture zone is determined by sensing and recording seismic wave motion at a series of spaced depths in a portion of a bore hole subjected to fracturing pressure during a shut-in period after the application of pressure while the... | 04/23/1991 |
| 4799546 | Drill pipe conveyed logging system A method and apparatus for drill pipe conveyed logging is disclosed. In a highly deviated well borehole, the apparatus comprises a housing for surrounding a logging tool, lockable and releasable rotating standoff means along said housing, and weights alon... | 01/24/1989 |
| 4700778 | Wet connector for use with drill pipe conveyed logging apparatus For use in drill pipe conveyed logging systems wherein the logging apparatus is enclosed in a housing affixed to the lower end of a drill pipe string, a system is disclosed utilizing a wet connector and overshot. The wet connector includes a centralized u... | 10/20/1987 |
| 4700140 | Determination of water or residual oil saturation in earth formations independent of lithology A method for determining the water or residual oil saturation of subsurface earth formations substantially independent of lithology utilizing electromagnetic energy propagation measurements. The subsurface formations are first logged to obtain base log me... | 10/13/1987 |
| 4690218 | Method for depth control and detonation of tubing conveyed gun assembly A method of registering perforating guns in a tubing conveyed perforating assembly as set forth. On a tubing string, a TCP assembly is lowered in a cased well. In the tubing string, a logging cable supported radioactive logging tool is then moved along th... | 09/01/1987 |
| 4635718 | Continuous obstruction monitor for well logging tools A continuous obstruction monitor for well logging drill strings including a well logging instrument at the forward end thereof transports the logging instrument through an earth borehole while continuously monitoring for obstructions. An outer tubular hou... | 01/13/1987 |
| 4597440 | Method and apparatus for displacing logging tools in deviated wells Method for displacing a logging tool through a non-gravity descent portion of a well such as a highly deviated portion, comprising the steps of providing a logging tool at the lower end of a drill pipe as an exposed extension to said drill pipe, displacin... | 07/01/1986 |
| 4570709 | Method and device for effecting, by means of specialized tools, such operations as measurements in highly inclined to the vertical or horizontal well portions A method for effecting logging or servicing operations in a predetermined zone of a well, following an initial portion thereof, comprising fastening a logging or servicing tool body at the end of a string of rods lowered into the well, said tool body bein... | 02/18/1986 |
| 4495992 | Hydraulic logging technique for inverted oil wells A hydraulic technique for logging well holes particularly in oil mining environments where the well holes extend upwardly from mining drifts. In the technique, the logging tool is initially positioned within the well hole in a fluid-tight, sealing engagem... | 01/29/1985 |
| 4488597 | Pump-down stinger assembly method and apparatus A pump-down stinger assembly method for use with a well-logging tool or well bore perforator suspended from a well-logging cable utilizes a stinger adaptor which releasably attaches a length of well-logging cable to the lower end of the stinger adapter an... | 12/18/1984 |
| 4484628 | Method and apparatus for conducting wireline operations in a borehole For conducting wireline operations in a deviated borehole, a dual or two-stage locomotive pulls a wireline cable through both the entire length of a drill string and the entire length of a stinger therein to dock with a tool at the bottom of the stinger. ... | 11/27/1984 |
| 4457370 | Method and device for effecting, by means of specialized tools, such operations as measurements in highly inclined to the vertical or horizontal well portions A method for effecting logging or servicing operations in a predetermined inclined or horizontal zone of a well, following an initial vertical portion thereof, comprising fastening a logging or servicing tool body at the end of a string of rods lowered in... | 07/03/1984 |
| 4349072 | Method and apparatus for conducting logging or perforating operations in a borehole A method and apparatus for conducting logging or perforating operation in a borehole, particularly a deviated borehole, includes lowering a length of drill pipe having the well-logging tool, or well bore perforator, releasably mounted thereon into the bor... | 09/14/1982 |
| 4281712 | Minimizing clay and shale damage in a log-inject-log procedure This invention relates to a method of determining oil saturation in an underground rock formation penetrated by a wellbore by use of a log-inject-log technique. In such techniques, thermal neutron decay time logs are taken with the formation in the native... | 08/04/1981 |
| 4216536 | Transmitting well logging data The accuracy of well logging data transmitted from a downhole location to the surface of the earth is verified by generating the data at the downhole location, storing the data in a subsurface assembly in the well, transmitting signals corresponding to th... | 08/05/1980 |
| 4192380 | Method and apparatus for logging inclined earth boreholes Apparatus for aiding a well logging instrument in traversing highly deviated boreholes including a plurality of extensible arms mounted in the elongated logging instrument, each arm terminating in a pad member which includes a toothed wheel or gear mounte... | 03/11/1980 |
| 4187908 | Method for ascertaining optimum location for well stimulation and/or perforation A method is disclosed for the in situ examination of earth formations penetrated by a borehole to ascertain the optimum location along the length thereof for instituting well stimulation operations or, where the well is cased, the optimum location for per... | 02/12/1980 |
| 4168747 | Method and apparatus using flexible hose in logging highly deviated or very hot earth boreholes After drilling an earth borehole, the drill pipe and drill bit are removed from the borehole and the drill pipe is reinserted into the borehole. A flexible hose such as a fire hose, and having a retro-nozzle at its lower end, is then pumped down through t... | 09/25/1979 |
| 4166500 | Well logging method and apparatus using friction-reducing agents A well logging instrument has a fluid chamber at its lower end and a plurality of controlled flow orifices leading from the chamber to the exterior of the instrument. A piston within the chamber, having a spring at its upper end, forces a friction-reducti... | 09/04/1979 |
| 4064939 | Method and apparatus for running and retrieving logging instruments in highly deviated well bores The system consists of means for running a logging instrument connected to a long rigid extension on a logging cable through open-ended drill pipe. The extension consists of a number of sections of tubing that are joined together on top of the instrument ... | 12/27/1977 |
| 3987850 | Well completion method for controlling sand production This specification discloses a method of completing a well that penetrates a subterranean formation. The formation is vertically fractured and a lower portion of the fracture is propped by hydraulic fracturing techniques leaving an overlying unpropped por... | 10/26/1976 |
