Patents by Inventor Ahmadi Tehrani
Ahmadi Tehrani has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8312920Abstract: A drilling fluid test device including a cell body having a pressurization inlet configured to allow for pressurization of the cell body, a fluid inlet configured to provide a test fluid, a filtrate outlet configured to discharge a filtrate, and a fluid outlet configured to discharge the fluid. The device also including a filter medium disposed in the cell body and a cleaning system disposed in the cell body and configured to clean the filter medium. Additionally, a method of testing a drilling fluid including injecting a drilling fluid into an automated testing cell, the automated testing cell having a filter medium. Furthermore, pressurizing the automated testing cell, forming a filter cake on the filter medium, and separating the drilling fluid into a filtrate and a residual drilling fluid. Additionally, transferring the filtrate to a filtrate collection vessel and determining a volume of filtrate in the filtrate collection vessel.Type: GrantFiled: April 25, 2008Date of Patent: November 20, 2012Assignee: M-I L.L.C.Inventors: Mostafa Ahmadi Tehrani, Jacqueline Joan Cameron
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Publication number: 20110180256Abstract: Methods for maintaining the rheology and reducing the fluid loss of chrome-free, aqueous-based wellbore fluids under high temperature-high pressure conditions are disclosed. The method may comprise formulating the chrome-free, aqueous wellbore fluid with an aqueous base fluid, at least one chrome-free viscosifier, at least one chrome-free fluid loss control additive, at least one chrome-free dispersant; and circulating the chrome-free aqueous-based wellbore fluid in a wellbore at temperatures exceeding 300° F.Type: ApplicationFiled: October 13, 2009Publication date: July 28, 2011Applicants: M-I L.L.C., M-I DRILLING FLUIDS UK LIMITEDInventors: Ahmadi Tehrani, Donna Gerrard, Steven Young, Jorge Fernandez
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Patent number: 7870782Abstract: Methods and apparatus to measure flow of a drilling fluid composition include a test housing including a test matrix located between an inlet and an outlet, a test valve connected between the inlet of the test housing and a fluid reservoir, and a pressure assembly configured to apply pressure to drilling fluid contained in the fluid reservoir. The apparatus and methods further include a sample valve connected to the outlet of the test housing and a measurement device configured to measure a filtrate fluid flowing through the outlet. A method to measure flow of a drilling fluid includes measuring an amount of filtrate fluid flowing through the test matrix as a function of time.Type: GrantFiled: March 17, 2008Date of Patent: January 18, 2011Assignee: M-I L.L.C.Inventors: Mostafa Ahmadi Tehrani, Jacqueline Joan Cameron
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Publication number: 20100298174Abstract: A method of slurrifying drill cuttings that includes admixing oil-contaminated drill cuttings, water, and at least one surface active agent; emulsifying at least a portion of the oil contaminants within the mixture; and forming a pourable slurry of drill cuttings in water is disclosed.Type: ApplicationFiled: July 23, 2008Publication date: November 25, 2010Applicant: M-I L.L.C.Inventors: Mostafa Ahmadi Tehrani, Mary Ann George
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Publication number: 20100139914Abstract: A drilling fluid test device including a cell body having a pressurization inlet configured to allow for pressurization of the cell body, a fluid inlet configured to provide a test fluid, a filtrate outlet configured to discharge a filtrate, and a fluid outlet configured to discharge the fluid. The device also including a filter medium disposed in the cell body and a cleaning system disposed in the cell body and configured to clean the filter medium. Additionally, a method of testing a drilling fluid including injecting a drilling fluid into an automated testing cell, the automated testing cell having a filter medium. Furthermore, pressurizing the automated testing cell, forming a filter cake on the filter medium, and separating the drilling fluid into a filtrate and a residual drilling fluid. Additionally, transferring the filtrate to a filtrate collection vessel and determining a volume of filtrate in the filtrate collection vessel.Type: ApplicationFiled: April 25, 2008Publication date: June 10, 2010Applicant: M-I LLCInventors: Mostafa Ahmadi Tehrani, Jacqueline Joan Cameron
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Publication number: 20100133204Abstract: A reusable filter for testing drilling fluids including a non-porous filter medium configured to be disposed in a drilling fluid testing device. The non-porous filter medium having a plurality of perforations extending therethrough. Additionally, a method of cleaning a reusable filter medium for a drilling fluid test device including exposing the reusable filter medium to a washing fluid, and agitating the washing fluid with a mechanical agitator to break up solids disposed on the reusable filter medium. Also, a drilling fluid test device including a cell body having a fluid inlet configured to provide a test fluid, a filtrate outlet configured to discharge a filtrate, and a fluid outlet configured to discharge the fluid. The drilling fluid test device also having a non-porous filter medium disposed in the cell body.Type: ApplicationFiled: April 25, 2008Publication date: June 3, 2010Applicant: M-I LLCInventors: Mostafa Ahmadi Tehrani, Jacqueline Joan Cameron
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Publication number: 20100099585Abstract: Embodiments disclosed herein related to an aqueous based well bore fluid that includes at least one ionized polymer, at least one non-ionic polymer, a non-magnetic weighting agent, and an aqueous base fluid.Type: ApplicationFiled: March 20, 2008Publication date: April 22, 2010Inventor: Ahmadi Tehrani
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Publication number: 20080236253Abstract: Methods and apparatus to measure flow of a drilling fluid composition include a test housing including a test matrix located between an inlet and an outlet, a test valve connected between the inlet of the test housing and a fluid reservoir, and a pressure assembly configured to apply pressure to drilling fluid contained in the fluid reservoir. The apparatus and methods further include a sample valve connected to the outlet of the test housing and a measurement device configured to measure a filtrate fluid flowing through the outlet. A method to measure flow of a drilling fluid includes measuring an amount of filtrate fluid flowing through the test matrix as a function of time.Type: ApplicationFiled: March 17, 2008Publication date: October 2, 2008Applicant: M-I LLCInventors: Mostafa Ahmadi Tehrani, Jacqueline Joan Cameron
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Publication number: 20080194433Abstract: An invert emulsion drilling fluid including an oleaginous fluid, wherein the oleaginous fluid is the continuous external phase of the drilling fluid; a non-oleaginous fluid, wherein the non-oleaginous fluid is the discontinuous internal aqueous phase of the drilling fluid containing water and at least one organic or inorganic salt dissolved in the water; and an aqueous-phase viscosifier, wherein the aqueous-phase viscosifier is selected from the group consisting of a biopolymer, a salt tolerant clay, and a synthetic polymer, and wherein the aqueous-phase viscosifier is dispersed in the non-oleaginous fluid in a sufficient concentration to increase a low shear viscosity of the invert emulsion drilling fluid.Type: ApplicationFiled: February 8, 2008Publication date: August 14, 2008Inventor: Ahmadi Tehrani
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Publication number: 20080164067Abstract: A method for reducing the aqueous content of oil-based drilling fluid includes contacting an invert emulsion wellbore fluid with a water absorbing polymer, interacting the water absorbing polymer with the wellbore fluid for a sufficient period of time so that the water absorbing polymer absorbs at least a portion of the aqueous fluid form the wellbore fluid; and separating the water absorbing polymer containing the absorbed water from the wellbore fluid.Type: ApplicationFiled: January 9, 2007Publication date: July 10, 2008Inventor: Ahmadi Tehrani
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Patent number: 6793025Abstract: A method of electrically logging subterranean wells using a conductive double emulsion fluid includes a miscible combination of an oleaginous fluid, an emulsifier capable of forming a microemulsion, an emulsifier capable of forming an invert emulsion, and an electrolytic salt. A microemulsion is the continuous phase of an invert emulsion. The electrolytic salt or brine of the salt is present in a concentration sufficient to permit the electrical logging of the subterranean well. The fluid may additionally contain a polar organic solvent and a carbon dioxide buffer. The polar organic solvent may be an oil soluble glycol or glycol ether such as ethylene glycol, diethylene glycol, propylene glycol, polypropylene glycol, and the like.Type: GrantFiled: June 17, 2002Date of Patent: September 21, 2004Assignee: M-I L. L. C.Inventors: Arvind D. Patel, Reginald J. Bell, Steve Young, Ahmadi Tehrani
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Publication number: 20030075360Abstract: A method of electrically logging subterranean wells using a conductive double emulsion fluid includes a miscible combination of an oleaginous fluid, an emulsifier capable of forming a microemulsion, an emulsifier capable of forming an invert emulsion, and an electrolytic salt. A microemulsion is the continuous phase of an invert emulsion. The electrolytic salt or brine of the salt is present in a concentration sufficient to permit the electrical logging of the subterranean well. The fluid may additionally contain a polar organic solvent and a carbon dioxide buffer. The polar organic solvent may be an oil soluble glycol or glycol ether such as ethylene glycol, diethylene glycol, propylene glycol, polypropylene glycol, and the like.Type: ApplicationFiled: June 17, 2002Publication date: April 24, 2003Inventors: Arvind D. Patel, Reginald J. Bell, Steve Young, Ahmadi Tehrani