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7311142 Apparatus and method for aquiring information while drilling  
A downhole tool positionable in a wellbore for penetrating a subterranean formation includes a housing having at least one protuberance extending therefrom. The protuberance has at least one...
7284604 Methods for measurement of a dimensional characteristic and methods of predictive modeling related thereto  
A method of optically determining a change in magnitude of at least one dimensional characteristic of a sample in response to a selected chamber environment. A magnitude of at least one dimension...
7281422 Method for borehole conductivity profiling  
A method of using an everting borehole liner to perform fluid conductivity measurements in materials surrounding a pipe, tube, or conduit, such as a borehole below the surface of the Earth. A...
7273097 Formation characterization using wellbore logging data  
Methods for determining formation characteristics comprising establishing baseline casing conditions for a string of casing disposed within a wellbore in a formation and measuring updated casing...
7255166 Imbibition well stimulation via neural network design  
A method for stimulation of hydrocarbon production via imbibition by utilization of surfactants. The method includes use of fuzzy logic and neural network architecture constructs to determine...
7228902 High data rate borehole telemetry system  
A system and method for communicating information between downhole equipment in a wellbore and surface equipment, comprising a first device disposed in a wellbore for receiving at least one first...
7210344 Method for measuring formation properties with a time-limited formation test  
An apparatus and method for determining at least one downhole formation property is disclosed. The apparatus includes a probe and a pretest piston positionable in fluid communication with the...
7137446 Fluids comprising reflective particles and methods of using the same to determine the size of a wellbore annulus  
In embodiments, methods of determining a size of an annulus in a wellbore include: (a) displacing a fluid comprising reflective particles downhole and up through the annulus, wherein the reflective...
7114562 Apparatus and method for acquiring information while drilling  
An apparatus and method useful for acquiring information from a subsurface formation penetrated by a wellbore contemplate the use of a tubular body adapted for connection within a drill string...
7059404 Variable intensity memory gravel pack imaging apparatus and method  
An apparatus and method are provided for varying an operating parameter for a nuclear gamma ray tool for evaluating the integrity of gravel packing. The gamma ray outpat intensity and area of...
7031841 Method for determining pressure of earth formations  
A method for determining formation pressure at a depth region of formations surrounding a borehole, including: keeping track of the time since cessation of drilling at the depth region; deriving...
7022241 Gas-gas-water treatment system for groundwater and soil remediation  
A sparging system for in-situ groundwater remediation for removal of contamination including dissolved chlorinated hydrocarbons and dissolved hydrocarbon petroleum products including the use in...
6983803 Equalizer valve and associated method for sealing a fluid flow  
A dirty fluid valve for sealing high differential fluid pressures in a drilling environment and methods for using such a valve is disclosed. One embodiment of the valve includes a seal cartridge...
6910374 Borehole conductivity profiler  
A method of using an everting borehole liner to perform fluid conductivity measurements in materials surrounding a pipe, tube, or conduit, such as a borehole below the surface of the Earth. A...
6827861 Gas-gas-water treatment system for groundwater and soil remediation  
A sparging system for in-situ groundwater remediation for removal of contamination including dissolved chlorinated hydrocarbons and dissolved hydrocarbon petroleum products including the use in...
6755246 In-situ heavy-oil reservoir evaluation with artificial temperature elevation  
Many reservoirs of interest include heavy oil. In such reservoirs, parti at normal temperatures, many instruments commonly used for formation evaluation may not be able to distinguish between heavy...
6675892 Well testing using multiple pressure measurements  
A technique includes measuring a first pressure of well fluid in a first region. The well fluid is produced from a formation into the first region. A second pressure of well fluid is measured in a...
6672386 Method for in-situ analysis of formation parameters  
A method of performing a formation rate analysis from pressure and formation flow rate data. Pressure and flow rate data are measured as fluid is withdrawn from a formation. Variable system volume...
6668922 Method of optimizing the design, stimulation and evaluation of matrix treatment in a reservoir  
A method for designing acid treatments provides for the selection of optimal treatment for well stimulation wherein reservoir characteristics are obtained to further select the reaction kinetic...
6618695 Method for gradually deforming a stochastic model of a heterogeneous medium such as an underground zone  
Method for gradually deforming, totally or locally, a Gaussian or similar type stochastic model of a heterogeneous medium such as an underground zone, constrained by a series of parameters relative...
6585045 Formation testing while drilling apparatus with axially and spirally mounted ports  
An apparatus and method for determining permeability of a subterranean formation is provided. The apparatus and method comprise a work string, at least one selectively extendable member mounted on...
6581685 Method for determining formation characteristics in a perforated wellbore  
A method for determining the characteristics of a subterranean formation penetrated by an existing or drilled well is disclosed. The method uses a mathematical model to estimate formation...
6575242 Method and an apparatus for use in production tests, testing an expected permeable formation  
When production testing a permeable first formation, fluid flowing out from the first formation is subjected to a pressure measurement and a flow rate control. In order to avoid bringing up the...
6554065 Memory gravel pack imaging apparatus and method  
The present invention provides apparatus and method for evaluating the integrity of gravel packing. A screen is disposed in an annulus between the wellbore and a production tubing. A tubing, such...
6543540 Method and apparatus for downhole production zone  
The present invention provides systems and methods for performing production testing in open holes and in cased holes that avoid transporting formation fluid to the surface. The invention...
6467542 Method for resonant vibration stimulation of fluid-bearing formations  
A process is provided to enhance fluid production, recovery, and/or injection from and/or into fluid-bearing formations. The process includes the stimulation of the formation by vibrations,...
6453727 Method of evaluating physical parameters of an underground reservoir from rock cuttings taken therefrom  
System of evaluating physical parameters such as the absolute permeability of porous rocks of a zone of an underground reservoir, from fragments taken from this zone, such as rock cuttings carried...
6450257 Monitoring fluid flow through a filter  
It is desirable to be able to monitor the condition of a filter in a fluid flow system, for example a sandscreen 3,4 in a fluid well. The invention provides monitoring apparatus including an...
6415648 Method for measuring reservoir permeability using slow compressional waves  
The present invention provides a method that is useful in determining the permeability of rock within a subterranean formation surrounding a borehole. The method involves the establishment of a...
6312605 Gas-gas-water treatment for groundwater and soil remediation  
A sparging system and process for in-situ removal of contaminants from soil and an associated subsurface groundwater aquifer of a site is disclosed. The sparge system is capable of extracting...
6305470 Method and apparatus for production testing involving first and second permeable formations  
When production testing a permeable first formation, fluid flowing out from the first formation is subjected to a pressure measurement and a flow rate control. In order to avoid bringing up the...
6138753 Technique for treating hydrocarbon wells  
A hydrocarbon producing well is treated by first igniting a gas generating charge in the well to clean out perforations communicating between the casing and the formation without creating high...
5974874 Method for testing gas wells in low pressured gas formations  
The "Tank Test" method for determining well tests in low pressured reservoirs or aquifers utilizes gravity drainage from a water storage tank to inject water into the reservoir. The Tank Test...
5925598 Water-based drilling fluid for use in shale formations  
A water-based drilling fluid for use in shale formations having a given average pore size has solutes dissolved therein sized so as to allow the pores of the shale formations to at least partially...
5871047 Method for determining well productivity using automatic downtime data  
A method is presented to estimate the productivity index, PI, and the well condition, s, of a pumping well utilizing the knowledge of pump runtime versus downtime. Runtime and downtime may be...
5832409 Automated gas permeameter  
An automated gas permeameter measures permeabilities of porous samples, such as rocks, ranging from 0.1 milliDarcys to 10 Darcys within 0.5% under dry and humid conditions. The automated gas...
5784333 Method for estimating permeability of earth formations by processing stoneley waves from an acoustic wellbore logging instrument  
A method for determining the permeability of earth formations penetrated by a wellbore from acoustic signals measured by an acoustic wellbore logging instrument. The method includes separating...
5663499 Method for estimating permeability from multi-array induction logs  
An improved method of estimating formation permeability is provided. Essentially, the improved method of the present invention combines a mud cake build-up/invasion model and a fully implicit...
5644076 Wireline formation tester supercharge correction method  
An improved formation testing method increases the accuracy of in-situ formation pressure measurements by characterizing the mudcake properties. Specifically, after a formation tester is lowered to...
5549159 Formation testing method and apparatus using multiple radially-segmented fluid probes  
An apparatus for withdrawing fluid from an earth formation comprising an elongated housing, a first inflatable elastomeric seal adapted to expansively fill an annular space between the housing and...
5520248 Method and apparatus for determining the hydraulic conductivity of earthen material  
An earthen material hydraulic conductivity determining apparatus includes, a) a semipermeable membrane having a fore earthen material bearing surface and an opposing rear liquid receiving surface;...
5519322 Magnetic field method and apparatus for evaluating in situ and/or measuring the premeability of a rock formation  
A method and the apparatus for in situ analysis of a rock formation that already contains fluid in its interstices an excitation device is provided for imparting motion to the fluid relative to the...
5477922 Method of evaluating the damage to the structure of rock surrounding a well  
Method for evaluating the damage to the structure of rock surrounding a well, comprising the following steps: injection into the rock, which is already saturated with a first fluid having a first...
5335542 Integrated permeability measurement and resistivity imaging tool  
A borehole tool having adjacently located fluid injection/withdrawal apparatus and an electromagnetic measurement apparatus is provided. The electromagnetic measurement apparatus can be an imaging...
5269180 Borehole tool, procedures, and interpretation for making permeability measurements of subsurface formations  
A borehole tool has a source probe in fluid contact with the borehole wall, a fluid flow line for bringing fluids to and from the source probe, two injection fluid chambers containing clean oil and...
5263360 Low permeability subterranean formation testing methods and apparatus  
The present invention provides methods and apparatus for determining the gas permeability of very low permeability subterranean formations as well as the gas permeability reducing effects of...
5156205 Method of determining vertical permeability of a subsurface earth formation  
A method of determining vertical permeability of a subsurface earth formation having the steps of perforating a production casing for an initial area less than a thickness of the subsurface earth...
4986120 Low-water-pressure controlled hydrologic test method  
A low-water-pressure-controlled hydrologic test using a measurement pipe containing an inner packer which is equipped with a water pressure gage at its tip is disclosed. Some water is poured into...
4716973 Method for evaluation of formation invasion and formation permeability  
A method is presented for evaluation of formation invasion and formation permeability by conducting a series of formation resistivity loggings in the operation of a measurement while drilling (MWD)...
4691772 Process for obtaining permeability logs using radioactive drilling mud additives  
A method for determining the permeability profile of an uncased borehole penetrating a subterranean formation by a natural gamma ray well logging technique in which particles containing gamma ray...
Matches 1 - 50 out of 59 1 2 >