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| Number | Title | Issue Date |
| 7432109 | Spetroscopic pH measurement using optimized mixtures of reagents to extend measurement range An indicator mixture that allows pH measurement over a broader range of pH or to a higher accuracy than available using conventional spectroscopic techniques. In particular, the mixture of the present invention is comprised of two or more reagents such that when com... | 10/07/2008 |
| 7427504 | Determining fluid chemistry of formation fluid by downhole reagent injection spectral analysis A method for analyzing formation fluid in earth formation surrounding a borehole includes storing analytical reagent in a reagent container in a fluids analyzer in a formation tester and moving the formation tester, including the reagent, downhole. Reagent from the ... | 09/23/2008 |
| 7424366 | Time-of-flight stochastic correlation measurements The present invention recited a method and apparatus for measuring a parameter of a fluid within a fluid channel using a tracer element injection by an injection element and detected by a detection element at a location separate from the injection element location. ... | 09/09/2008 |
| 7408150 | Well logging method for determining formation characteristics using pulsed neutron capture measurements A method for determining thermal capture cross-sections of formations surrounding an earth borehole, including the following steps: providing a logging device that is moveable through the borehole; transmitting, from the logging device, bursts of neutrons into the f... | 08/05/2008 |
| 7401665 | Apparatus and method for drilling a branch borehole from an oil well A wireline drill train is used to drill an elongated, small diameter, lateral branch borehole from near the base of a main well. The drill train, includes a drill module, a first self-propelled thrust module coupled to the drill module, and a second self-propelled t... | 07/22/2008 |
