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| Number | Title | Issue Date |
| 7779683 | Tracking fluid displacement along a wellbore using real time temperature measurements Tracking fluid displacement along a wellbore using real time temperature measurements. A method of tracking fluid displacement along a wellbore includes the steps of: monitoring temperature in real time in the wellbore; and observing in real time a variation in temp... | 08/24/2010 |
| 7730774 | Tracking fluid displacement along a wellbore using real time temperature measurements Tracking fluid displacement along a wellbore using real time temperature measurements. A method of tracking fluid displacement along a wellbore includes the steps of: monitoring temperature in real time in the wellbore; and observing in real time a variation in temp... | 06/08/2010 |
| 7363717 | System and method for using rotation sensors within a borehole A system and method for using a survey tool within a borehole is provided. The survey tool includes a plurality of rotation sensors each having a sensing axis and a direction of least acceleration sensitivity. The sensing axes of the plurality of rotation sensors ar... | 04/29/2008 |
| 7350410 | System and method for measurements of depth and velocity of instrumentation within a wellbore A survey tool for use in a wellbore includes a downhole portion having an axis. The downhole portion is adapted to move within the wellbore with the axis generally parallel to the wellbore. The survey tool further includes a first acceleration sensor mounted at a fi... | 04/01/2008 |
| 7318673 | Temperature control system for food items The invention relates to a control system of the chilling process of the temperature of food items at values near but above 0° C. that prevents surface freezing of a food item. The surface freezing can be foreseen due to a mathematical relationship that is a functi... | 01/15/2008 |
| 7258483 | Device for measuring the level and/or the temperature in a container A device for measuring at least one of a level and a temperature of a liquid in a container includes a resistor arrangement adapted to be immersed in the liquid. An immersed length of the resistor arrangement in the liquid corresponds to the level of the liquid in t... | 08/21/2007 |
| 7210336 | Gas link leak evacuation and monitoring system An apparatus and method for evacuating gas from the soil surrounding a leaking gas conduit utilizes non-sparking and static dissipating components to reduce the risk of an explosion. The evacuation of gas from probes in boreholes in the vicinity of the leak is induc... | 05/01/2007 |
| 7128167 | System and method for rig state detection A method and system is disclosed for automatically detecting the state of a drilling rig during the drilling process of a wellbore. Two or more, but preferably four independent input data channels are received, each input data channel representing a series of measur... | 10/31/2006 |
| 7086484 | Determination of thermal properties of a formation The present invention relates to methods and apparatus for making in situ thermal property determinations utilizing a heat source employed in wellbore stabilization procedures, well drilling, or well perforating, for example. In particular, using a heat source, such... | 08/08/2006 |
| 7017650 | Earth loop energy systems Wellbore heat loop systems, fillers for bores in the systems, and methods of the use of such systems; the systems in certain aspects having a heat loop wellbore in the earth having heat loop pipe extending down to one side of a bottom member and up therefrom on anot... | 03/28/2006 |
| 6957580 | System and method for measurements of depth and velocity of instrumentation within a wellbore A survey tool for use in a wellbore includes a downhole portion having an axis. The downhole portion is adapted to move within the wellbore with the axis generally parallel to the wellbore. The survey tool further includes a first acceleration sensor mounted at a fi... | 10/25/2005 |
| 6945691 | Method and apparatus for inferring a temperature A heat-conducting element having known length D is disposed at a first end in a first region having a first temperature T1 to be inferred. The second end of the element is disposed in a second region having a measureable second temperature T2 d... | 09/20/2005 |
| 6905241 | Determination of virgin formation temperature A method for determining virgin formation temperature of earth formations surrounding a borehole is provided. The time duration of drilling fluid circulation and the time after cessation of drilling fluid circulation at the borehole depth regions of interest are tra... | 06/14/2005 |
| 6778908 | Environmentally mitigated navigation system An environmentally mitigated navigation system includes a thermal isolating chamber, an inertial measurement unit that can include individual gyroscopes and accelerometers for making inertial measurements, and a temperature control system; the temperature control sy... | 08/17/2004 |
| 6585036 | Energy systems An earth energy transfer system with a moving energy transfer fluid, the system for transferring energy for an entity, the system, in certain aspects, having apparatus and related items for measuring an amount of energy transferred for the entity to or fr... | 07/01/2003 |
| 6497279 | Method of using a heater with a fiber optic string in a wellbore The present invention provides a heater cable (10) that may be deployed in a wellbore to elevate the temperature of the wellbore above the temperature of the surrounding fluid and the formation. One or more fiber optic strings are included in or are carri... | 12/24/2002 |
| 6276438 | Energy systems An earth energy transfer system with a moving energy transfer fluid, the system for transferring energy for an entity, the system, in certain aspects, having apparatus and related items for measuring an amount of energy transferred for the entity to or fr... | 08/21/2001 |
| 5767400 | Hydraulic test system mounted with borehole television set for simultaneous observation in front and lateral directions The present invention provides a hydraulic test system, by which it is possible to select a proper position and to select a reliable measurement interval corresponding to said position, to obtain information for preventing retention or leaving of the equi... | 06/16/1998 |
| 5226333 | Deep-well thermal flowmeter The flowmeter includes a planar wire grid immersed in the fluid flow perpendicular to the direction of fluid flow. Capacitors discharge an electrical current through the wire grid to heat the wire grid and thereby produce, by heat conduction, a thermopuls... | 07/13/1993 |
| 5201219 | Method and apparatus for measuring free hydrocarbons and hydrocarbons potential from whole core A heating probe and collection assembly is provided for evaluating free hydrocarbons and hydrocarbon potential of whole core. In one embodiment, the one or more assemblies are used with a core transport system to provide measures of hydrocarbon potential ... | 04/13/1993 |
| 5159569 | Formation evaluation from thermal properties A method for determining thermal characteristics of a geological formation from observations of temperature relaxation in a formation after a temperature perturbation, such as that resulting from circulation of drilling mud. A method of determining petrop... | 10/27/1992 |
| 4616705 | Mini-well temperature profiling process In treating a well, automatically controlled measurements of temperature with depth within a subterranean interval which can be longer than hundreds of feet, deeper than thousands of feet and hotter than 600° C., are made by extending a slender measuring... | 10/14/1986 |
| 4575260 | Thermal conductivity probe for fluid identification For use with a sonde adapted to be lowered into a well borehole, the sonde supports a thermal conductivity probe response to well fluid thermal conductivity. In the preferred and illustrated embodiment, a four leg resistor bridge circuit has two temperatu... | 03/11/1986 |
| 4559818 | Thermal well-test method A well-test method involving injection of hot (or cold) water into a groundwater aquifer, or injecting cold water into a geothermal reservoir. By making temperature measurements at various depths in one or more observation wells, certain properties of the... | 12/24/1985 |
| 4537067 | Inertial borehole survey system An inertial borehole survey system is disclosed. The survey system of the present invention includes a probe suitable for insertion into a borehole. The probe includes a plurality of temperature sensitive inertial measuring instruments which are utilized ... | 08/27/1985 |
| 4469451 | Method and apparatus for measuring temperature of an earth formation in the presence of a radio frequency electromagnetic field A method and apparatus for measuring the temperature in a subsurface earth formation that is being heated in situ by subjection to a radio frequency electromagnetic field. It includes lowering a maximum registering thermometer into the formation on a non-... | 09/04/1984 |
| 4420974 | In-situ measurement system A multipurpose in situ underground measurement system comprising a plurality of long electrical resistance elements in the form of rigid reinforcing bars, each having an open loop "hairpin" configuration of shorter length than the other resistance element... | 12/20/1983 |
| 4343181 | Method for determining thermal conductivity and thermal capacity per unit volume of earth in situ A method for determining the thermal conductivity of the earth in situ is based upon a cylindrical probe (10) having a thermopile (16) for measuring the temperature gradient between sets of thermocouple junctions (18 and 20) of the probe after it has been... | 08/10/1982 |
| 4109717 | Method of determining the orientation of hydraulic fractures in the earth A method of determining the orientation of fractures in a cased well by determining the temperature differences (and direction thereof) between the circumference and the interior of the well prior to dissipation of the thermal disturbances created by the ... | 08/29/1978 |
| 3981187 | Method for measuring the thermal conductivity of well casing and the like A method for measuring the thermal conductivity of well casing in situ. The instrument consists of a probe several feet in length lowered into a well and decentralized so that it maintains contact with the casing wall. Two temperature sensors situated adj... | 09/21/1976 |
| 3938383 | Method and apparatus for detecting the thermal characteristics of a subsurface formation in situ A method and apparatus for detecting the thermal characteristics of a subsurface formation in situ wherein a borehole has been drilled from the earth's surface, including inserting a known volume of cryogenic material into the borehole to a predetermined ... | 02/17/1976 |
