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7357021 |
Methods of monitoring downhole conditions
Methods of monitoring various downhole conditions are described, including a system for determining and/or identifying the flow of fluid in a well, determining sand production in a well,...
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7168311 |
Fiber optic monitoring of flow inside and outside a tube downhole
An apparatus and method for monitoring and characterizing the fluid flow in and around the tubing string in a wellbore, preferably using fiber optic componentry. The apparatus includes a signal...
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7032661 |
Method and apparatus for combined NMR and formation testing for assessing relative permeability with formation testing and nuclear magnetic resonance testing
Formation testing, resistivity and NMR measurements are used concurrently to determine a relative permeability representative of a formation surrounding the borehole. A method and apparatus is...
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7017662 |
High temperature environment tool system and method
In at least some embodiments, a tool may comprise a tool body and one or more tool components. The tool may further comprise tool electronics located within the tool body, wherein the tool...
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6799634 |
Tracer release method for monitoring fluid flow in a well
A tracer release method for monitoring fluid flow in a well utilizes a deformable container having a liquid tracer material which container has an outlet which debouches into the neck portion of a...
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6650280 |
Measurement system and method
System and methods are disclosed for fluid measurements which may be utilized to determine mass flow rates such as instantaneous mass flow of a fluid stream. In a preferred embodiment, the present...
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6499344 |
Apparatus and method to obtain representative samples of oil well production
A well tester adapted to select among members of an oil well family to provide a purged and clean vessel to receive samples of well production that include gas and oil, and by selective use of...
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6343507 |
Method to improve the quality of a formation fluid sample
The present invention provides a method for improving the quality of a formation fluid sample by taking the sample at a time when the formation fluid composition contains the most favorable portion...
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6324904 |
Miniature pump-through sensor modules
Sensor modules are provided which are pumped into a well by first being pumped downhole within a drill string, then passing through the drill bit and being circulated uphole in the annulus between...
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6301959 |
Focused formation fluid sampling probe
A formation fluid sampling probe uses two hydraulic lines to recover formation fluids from two zones in a borehole. One of the zones is a guard zone and the other is a probe zone. The guard zone...
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6234250 |
Real time wellbore pit volume monitoring system and method
A system is provided for monitoring in the real time the wellbore pit volume to promptly determine the occurrence of a wellbore kick and take corrective action to minimize fluid influx volume...
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6212948 |
Apparatus and method to obtain representative samples of oil well production
An apparatus and process for obtaining representative samples of fluids produced from one or more oil wells by means of a closed vessel chamber with lease water supply port connected to a lease...
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6176129 |
Method and apparatus for acquiring data in a hydrocarbon well
In a hydrocarbon well, a speed measurement is performed at substantially the same level as a determination of the proportions of the phases of the fluid flowing along the well in at least one local...
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6028307 |
Data acquisition and reduction method for multi-component flow
A method of determining a holdup value for a multiphase fluid. A first holdup component is calculated using a first detection technique which is insensitive to small inclusions of a first fluid...
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5955666 |
Satellite or other remote site system for well control and operation
The downhole portion of the system of the present invention provides entirely downhole methods and apparatus for the monitoring and control of wells. The components of the system are modular. There...
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5831156 |
Downhole system for well control and operation
A downhole, modular, well-monitoring and control system is disclosed for use as a stand alone system capable of being left unconnected to the surface in a cased and completed well borehole. Annular...
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5744709 |
Measurement of specific interfacial areas of immiscible fluid interfaces in flow systems
This invention relates generally to methods of measuring interfacial areas, and more specifically to flow-based methods for measuring the area of the interfaces between two immiscible fluids. The...
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5736637 |
Downhole multiphase flow sensor
A system for evaluating multiphase flow of a fluid downhole in a borehole. Dielectric permittivity electrodes generate a capacitance output signal through the fluid, and conductivity electrodes...
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5661236 |
Pad production log tool
A production logging tool includes a plurality of pads affixed on a log tool so that the pads are located on the outer periphery of the well and are directed toward the borehole center. In the...
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5461909 |
Oxygen activation method for quantitative water flow measurements within and behind well bore casing
A method for measuring the linear flow velocity, radial position, direction, and the flow rate of water flowing within and behind a well borehole casing. A logging tool containing a source of...
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5404752 |
Method for measuring the velocity of water flow through nested conduits
This disclosure provides a method for measuring the velocities of water volumes flowing co-directionally in separate conduits nested such as in injection or production well-bores. The method allows...
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5383122 |
Method for analyzing pressure buildup in low pumping rate wells
The pressure build-up of hydrocarbon wells is quickly measured allowing the well to be shut-in for a shorter length of time than previously possible to achieve the same results. After the well has...
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5375465 |
Method for gas/liquid well profiling
A method for profiling of a gas and liquid producing wells comprising compiling calibration data from measuring instruments within non-in situ test equipment, valuing downhole gas and liquid...
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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,...
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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...
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5351533 |
Coiled tubing system used for the evaluation of stimulation candidate wells
The present invention is an improved apparatus and method for measuring downhole flowing and shut-in pressures to determine the condition of the reservoir and the potential of the well as a...
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5275041 |
Equilibrium fracture test and analysis
The present invention is generally directed to a method for determining certain parameters necessary for fracture treatment design. The method and analysis of the present invention provide for...
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5265015 |
Determining horizontal and/or vertical permeability of an earth formation
Fluid flow measurements are made in situ using a repeat formation tester with a modified probe aperture, or on rock samples using a mini-permeameter with a modified probe aperture. The modified...
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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...
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5219388 |
Method and apparatus for testing water permeability of concrete
A method for measuring the water permeability in a concrete structure comprising: (a) pressure sealing a selected length of a borehole in the concrete structure, (b) injecting an aqueous medium...
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5211842 |
Three-phase well test apparatus using pumped recirculation to maintain homogenous flow
A three-phase well test apparatus and method using a two-phase separator. A separator is used to separate well fluid into gas and liquid constituents. The gas constituent is measured by a gas flow...
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5138876 |
Method and apparatus for measuring steam profiles in steam injection wells
A method and apparatus for determining the vapor flow only, or the vapor and liquid flows into various formations surrounding a thermal injection well. The apparatus utilizes a downhole tool having...
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5107441 |
System for evaluating the flow performance characteristics of a device
A system for determining the flow performance of a valve by first measuring certain flow parameters of the valve with the stem fixed in a plurality of different positions between full open and full...
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5094103 |
Steam quality and flow rate measurement
A method and apparatus for measuring both the quality and flow rate of steam injected into a hydrocarbon formation in a thermal recovery process. The method measures both the quantity of water and...
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5063776 |
Method and system for measurement of fluid flow in a drilling rig return line
Improved methods and systems are provided for determining a volumetric flow rate of mud in a return line without the aid of a velocity probe. A mud level sensor is located in a return line chimney...
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5042296 |
Method of in-situ testing of a drilling fluid
The method comprises during a drilling operation wherein the drilling fluid is set moving and the drill string is stationary, monitoring the pressure of the drilling fluid pumped into the drill...
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5042297 |
Well-logging process and device in a non-flowing production well
A well logging process and device for use in a non-flowing production well, wherein the well is activated to trigger production of effluents on both sides of a first measuring arrangement, with at...
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4928522 |
Steam injection survey apparatus and method for testing wells
A radio-active tracer, carried by a pressurized gas, is injected through an axially displaceable tube into a flow stream of steam within a well tubing string to perform a steam injection survey of...
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4901563 |
System for monitoring fluids during well stimulation processes
Certain wellbore fluid stimulation treatments may be monitored by a system including instrumented manifolds which may be connected between a base fluid source and a blending unit and between the...
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4843878 |
Method and apparatus for instantaneously indicating permeability and horner plot slope relating to formation testing
For use in a formation testing tool adapted to be lowered into a borehole on a logging cable, apparatus is set forth which conducts formation measurements including extension of a snorkel into a...
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4821564 |
Method and system for determining fluid pressures in wellbores and tubular conduits
Friction pressure losses are obtained for non-Newtonian or generalized Newtonian fluids being pumped through conduits at high flow rates, such as in hydraulic fracturing of subterranean formations,...
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4803873 |
Process for measuring flow and determining the parameters of multilayer hydrocarbon producing formations
The invention concerns a process for measuring the flow as a function of time of the several layers of a subterranean multilayer hydrocarbon-producing formation through which a well is drilled, and...
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4761997 |
Ground water well dimensioning procedure
The dimensioning of a ground water well is obtained by investigating the yield characteristics of the ground water region by conducting a series of pumping runs using an observation tube in...
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4757709 |
Flowmeter for use in a hydrocarbon well
The flowmeter comprises a central mandrel suspended from a cable and centered in the fluid stream so as to leave an annular passage. Fluid stream contracting means are provided for forming a...
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4703664 |
Fluid flow measurement system sensor mounting block
A system, or apparatus combination, and apparatus components, for the measurement of fluid flow. Such system, or apparatus can be used, e.g. for measuring the amount or flow of drilling fluid, or...
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4571993 |
Cementing system including real time display
For use with a cement supply, cement pump and a cement delivery system for cementing a well, an indicator including a real time display system is set forth in the preferred and illustrated...
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4558592 |
Apparatus for on-site assessment of the effectiveness of a treatment in the course of its application to a hydrocarbon well
The invention relates to an apparatus enabling assessment in real time of the effectiveness of a treatment of a hydrocarbon well which is being applied by introducing fluids under pressure into an...
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4527425 |
System for detecting blow out and lost circulation in a borehole
A drilling mud flow rate detector, including a sub adapted for being positioned in the drill string, having a sonic signal generator located near the center of the sub in both the incoming mud flow...
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4523459 |
Method for performing step rate tests on injection wells
In a method for performing a step rate test on an injection well, a portable pumping unit is employed to increase the pressure on the injected water to a predetermined level in order to carry out...
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4513612 |
Multiple flow rate formation testing device and method
A method and apparatus for measuring the permeability, as well as the deliverability, of earth formations traversing a well bore, includes drawing one or more formation flow tests, usually of small...
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