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Class 166/250.05 - Scale or corrosion determination


Subclass of Class 166 - Wells
Definition: Indicating including the step(s) of finding detritus or
No. of patents: 26
Last issue date: 06/21/2011


NumberTitleIssue Date
7963324Flow control actuation
A method usable with a subterranean well that includes actuating a downhole tool (a valve assembly, for example). The method also includes applying at least one of an impulse stimulus and a vibration stimulus to the tool during the actuating to enhance operation of ...
06/21/2011
7325605Flexible piezoelectric for downhole sensing, actuation and health monitoring
Thin flexible piezoelectric transducers are bonded to or imbedded into oilfield tubular members or structural members. The transducers may be used to telemeter data as acoustic waves through the members. By proper spacing of transducers and phasing of driving signal...
02/05/2008
7289942Performance prediction method for hydrocarbon recovery processes
The invention relates to a method for predicting the performance of large-scale hydrocarbon-bearing reservoir floods. One embodiment of the invention includes a method for predicting performance of a patterned flooding process in a subterranean hydrocarbon-bearing f...
10/30/2007
7231819Chemical sensor for wellbore applications
There is described an analyzing device having two separation units to separate molecular species to detect molecular species in wellbore fluids with both separation units operating under forced flow conditions to provide for an active separation of subterranean well...
06/19/2007
7219541Method and apparatus for downhole fluid analysis for reservoir fluid characterization
A formation fluid sample is exposed to a rigidly-supported semi-permeable membrane such as silicone rubber to permit diffusion of gases and vapors from the formation fluid into a vacuum chamber, while at the same time, blocking the passage of any liquids. The membra...
05/22/2007
7216533Methods for using a formation tester
A method of testing a downhole formation using a formation tester on a drill string. The formation tester is disposed downhole on a drill string and a formation test is performed by forming a seal between a formation probe assembly and the formation. A drawdown pist...
05/15/2007
7076992Method and apparatus for calibrating position and thickness in acoustic hull testing
A system is provided for calibrating an acoustic hull integrity sensing system by providing a coupon attached to the interior surface of the hull, in which the coupon has a stepped calibration block, with one of the steps approximating the thickness of the hull to b...
07/18/2006
7048803Method of dissolving scale
A method of dissolving scale comprises contacting the scale with a solution of an alkali metal bisulfate. Another method of dissolving scale comprises contacting the scale with a solution of an alkali metal bisulfate and a strong mineral acid. A further method of di...
05/23/2006
7037724Method for storing and transporting crude oil
Disclosed is a method for transporting blended crude oils comprising the steps of; (a) admixing a first crude oil with a second, different crude oil to form a crude oil admixture; (b) determining a first value representing the content of unprecipitated asphaltenes i...
05/02/2006
7025138Method and apparatus for hydrogen sulfide monitoring
The present invention relates to a method and apparatus for detection of hydrogen sulfide in downhole operations. A downhole tool is provided with a coupon adapted to react at varying degrees to exposure to concentrations of hydrogen sulfide. The downhole tool is po...
04/11/2006
6998999Hybrid piezoelectric and magnetostrictive actuator
An electromechanical transducer formed by an electrical and mechanical combination of a piezoelectric device and a magnetostrictive device. The two devices are electrically coupled so that their capacitive and inductive reactances approach a balance to provide an es...
02/14/2006
6792796Scale prediction probe
A method for predicting scale deposition in a general environment has been discovered which involves providing a localized environment where scale would preferentially form, where the localized environment is adjacent the general environment. Monitoring the depositi...
09/21/2004
6725925Downhole cathodic protection cable system
A downhole cathodic protection cable system includes an attachment shoe electrically connected to a metallic structure at a distance substantially below the earth's surface, and an electrical cable having a first end connected to a connection structure substantially...
04/27/2004
6712139Method of well casing cathodic protection optimization using the drill stem data
A method of cathodic current optimization measures drill stem resistances along a well hole being drilled, correlates the drill stem resistances to respective types of underground formations at corresponding positions along the well hole, predicts a respective posit...
03/30/2004
6668922Method 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 data on the minerals of interests, the treatment to the reser...
12/30/2003
6467340Asphaltenes monitoring and control system
The present invention provides a system that monitors and controls the precipitation of asphaltenes in a formation fluid recovered from a subsurface formation or reservoir by using a sensor to make a direct real-time on-site measurement of the relative co...
10/22/2002
6223822Downhole sampling tool and method
A sampling device for use downhole is provided comprising a hollow body (24) having a fluid inlet port (26) for fluid entry to the interior thereof, characterised by a gas extraction system (64) associated with the hollow body (24) and capable of securing...
05/01/2001
6131659Downhole well corrosion monitoring apparatus and method
The existence and rate of corrosion in a section of a well tubing or well casing string is determined and monitored continuously or intermittently by installing at predetermined locations as the string is placed in the well bore, sections of pipe that hav...
10/17/2000
5783524Use of glycine-N,N-diacetic acid derivatives as complexing agents for alkaline earth metal and heavy metal ions in the production and transport of petroleum and natural gas
Glycine-N,N-diacetic acid derivatives and their alkali metal, akaline earth metal, ammonium and substituted ammonium salts, used as completing agents for alkaline earth metal and heavy metal ions in the production and transport of petroleum and natural ga...
07/21/1998
5533572System and method for measuring corrosion in well tubing
Corrosion in well tubing strings, pipe and similar conduits may be determined by a circuit which includes a current sensitive meter and a known voltage source which is placed at selected intervals in the tubing string to make current flow measurements and...
07/09/1996
5360065Scale inhibitor and process for using
A copolymer of sodium vinyl sulfonate and polyalkylene glycol mono- or di-methacrylate and a process for inhibiting scale deposition, particularly inorganic sulfate such as barium sulfate. An aqueous fluid present in or produced from a subterranean format...
11/01/1994
5171459Scale deposition inhibitor
A aqueous oil well scale inhibiting composition is disclosed as well as a dispersion and scale inhibiting method. The inhibitor comprises a phosphate ester or phosphonate calcium carbonate inhibitor and a sulfonated alkyldiphenylether zinc and/or lead sul...
12/15/1992
5152177Process for the detection and quantitation of corrosion and scale inhibitors in produced well fluids
Corrosion and scale inhibitors in fluids produced from a subterranean formation are separated, detected, and quantified by thin layer chromatography through the use of selected developing solvents and visualization reagents....
10/06/1992
4856584Method for monitoring and controlling scale formation in a well
Formation of scale from radioactive components is monitored with a radiation detector. Upon indication of initiation of scale formation in a system, treatment with inhibitor is carried out....
08/15/1989
4665981Method and apparatus for inhibiting corrosion of well tubing
Method and apparatus of inhibiting corrosion of well tubing. A corrosion monitor detects the concentration of a corrosive element in fluid produced from well tubing. Corrosion inhibitor is injected into the tubing by a pump at the depth at which water vap...
05/19/1987
4354553Corrosion control downhole in a borehole
Well treatment method and apparatus for chemically inhibiting downhole production equipment with corrosion inhibitors. Water is separated from the produced well fluid, and the flow rate and corrosive properties of the separated water is measured. Inhibito...
10/19/1982
 
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