Inventor

Terizhandur S. Ramakrishnan

Inventor

Boxborough, MA, US

Overview

1993–2021

Patent span

Physics

Primary field (CPC G)

Patents· 71 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

E21Bprimary

E21BEarth or rock drilling33%

G01NInvestigating or analysing materials by determining their chemical or physical properties15%

G01VGeophysics13%

Y02CCapture, storage, sequestration or disposal of greenhouse gases [ghg]7%

Y02PClimate change mitigation technologies in the production or processing of goods5%

G06FElectric digital data processing3%

G06QInformation and communication technology [ict] specially adapted for administrative, commercial, financial, managerial or supervisory purposes3%

B01DSeparation2%

G01FMeasuring volume, volume flow, mass flow or liquid level2%

F04DNon-positive-displacement pumps1%

PatentTitleYear

11,085,877Apparatus and methods for measuring the refractive index of a fluid2021 10,942,144CO2 concentration measurement in dry gas mixtures2021 10,941,646Flow regime identification in formations using pressure derivative analysis with optimized window length2021 10,927,668Methods and apparatus for the downhole analysis of the composition of formation gases2021 10,876,395Cross-well seismic monitoring of carbon dioxide injection2020 10,837,893Methods for measurement of ultra-low permeability and porosity2020 10,781,678Methods and systems for enhanced oil recovery employing nanofluids2020 10,705,069Synthetic fractured medium and method of fabrication2020 10,557,346Methods for determining saturation parameters of a formation2020 10,430,872Method of valuation of geological asset or information relating thereto in the presence of uncertainties2019 10,365,202Method for measurement of ultra-low permeability and porosity by accounting for adsorption2019 10,329,903Methods of characterizing earth formations using physiochemical model2019 10,288,517Apparatus and calibration method for measurement of ultra-low permeability and porosity2019 10,274,411Methods for measurement of ultra-low permeability and porosity2019 10,156,321Methods and systems for optimizing carbon dioxide sequestration operations2018 10,151,738Methods and apparatus for the downhole analysis of the composition of formation gases2018 10,113,398Fuel cell apparatus and method for downhole power systems2018 10,101,255Apparatus and methods for analysis of reservoir fluids2018 9,804,117'CO2 concentration measurement in dry gas mixtures'2017 9,542,508'Model based inversion of seismic response for determining formation properties'2017 9,534,481'Formation treatment evaluation'2017 9,500,583'Method and apparatus for measuring carbon dioxide dissolved in solution and wellbore monitoring systems based thereon'2016 9,371,710'Fluid minotiring and flow characterization'2016 9,312,557'Fuel cell apparatus and method for downhole power systems'2016 9,291,046'Dual or twin-well completion with wettability alteration for segregated oil and water production'2016 9,235,838'System and method for secure downhole intelligent completions'2016 9,051,822'Formation treatment evaluation'2015 8,919,438'Detection and quantification of isolation defects in cement'2014 8,874,382'Methods and systems for optimizing carbon dioxide sequestration operations'2014 8,862,407'Method and apparatus utilizing nuclear magnetic resonance measurements for estimating residual carbon dioxide saturation in aquifers'2014 8,720,552'Tool and method for determining formation parameter'2014 8,612,193'Processing and interpretation of real-time data from downhole and surface sensors'2013 8,548,785'Method for uncertainty quantification in the performance and risk assessment of a carbon dioxide storage site'2013 8,452,539'Method and apparatus utilizing nuclear magnetic resonance measurements for estimating residual carbon dioxide saturation in aquifiers'2013 8,297,354'Tool and method for determining formation parameter'2012 8,276,380'Zero emission natural gas power and liquefaction plant'2012 8,251,140'Fluid monitoring and flow characterization'2012 8,191,416'Instrumented formation tester for injecting and monitoring of fluids'2012 8,176,984'Systems and methods for downhole sequestration of carbon dioxide'2012 8,028,563'Pressure interference testing for estimating hydraulic isolation'2011 7,886,591'Method for improving the determination of earth formation properties'2011 7,763,099'Downhole separation of carbon dioxide from natural gas produced from natural gas reservoirs'2010 7,753,117'Tool and method for evaluating fluid dynamic properties of a cement annulus surrounding a casing'2010 7,753,118'Method and tool for evaluating fluid dynamic properties of a cement annulus surrounding a casing'2010 7,726,402'Methods for downhole sequestration of carbon dioxide'2010 7,715,984'Method for continuous interpretation of monitoring data'2010 7,607,303'Zero emission natural gas power and liquefaction plant'2009 7,555,390'Petrophysical interpretation of multipass array resistivity data obtained while drilling'2009 7,263,881'Single probe downhole sampling apparatus and method'2007 7,221,158'Permeability determinations from nuclear magnetic resonance measurements'2007 7,165,621'Method for exploitation of gas hydrates'2007 7,152,466'Methods and apparatus for rapidly measuring pressure in earth formations'2006 7,134,500'Formation fluid characterization using flowline viscosity and density data an oil-based mud environment'2006 7,096,092'Methods and apparatus for remote real time oil field management'2006 7,081,615'Methods and apparatus for the downhole characterization of formation fluids'2006 7,013,723'Apparatus and methods for canceling the effects of fluid storage in downhole tools'2006 7,000,697'Downhole measurement apparatus and technique'2006 6,860,325'Downhole flow meter'2005 6,829,570'Oilfield analysis systems and methods'2004 6,675,892'Well testing using multiple pressure measurements'2004 6,629,564'Downhole flow meter'2003 6,415,864'System and method for separately producing water and oil from a reservoir'2002 6,115,671'Method for estimating rock petrophysical parameters using temperature modified NMR data'2000 6,088,656'Method for interpreting carbonate reservoirs'2000 6,061,634'Method and apparatus for characterizing earth formation properties through joint pressure-resistivity inversion'2000 6,040,696'Method for estimating pore structure in carbonates from NMR measurements'2000 5,992,519'Real time monitoring and control of downhole reservoirs'1999 5,832,409'Automated gas permeameter'1998 5,497,321'Well logging method for determining fractional flow characteristics of earth formations'1996 5,335,542'Integrated permeability measurement and resistivity imaging tool'1994 5,269,180'Borehole tool, procedures, and interpretation for making permeability measurements of subsurface formations'1993

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1993–2021Patents assigned to SCHLUMBERGER TECHNOLOGY CORP (69)· patent assignee history

1993–2016Based in Bethel, CT, US· patent location history

2009–2021Based in Boxborough, MA, US· patent location history

2012–2017Patents assigned to RAMAKRISHNAN TERIZHANDUR S (18)· patent assignee history

2012–2015Patents assigned to AYAN COSAN (3)· patent assignee history

2012–2016Patents assigned to HABASHY TAREK M (3)· patent assignee history

2012–2015Patents assigned to KUCHUK FIKRI JOHN (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SCHLUMBERGER TECHNOLOGY CORP	69	1993–2021
RAMAKRISHNAN TERIZHANDUR Sself	18	2012–2017
AYAN COSAN	3	2012–2015
HABASHY TAREK M	3	2012–2016
KUCHUK FIKRI JOHN	3	2012–2015

Locations

Location	Patents	Span
Boxborough, Massachusetts, US	43	2009–2021
Bethel, CT, US	28	1993–2016