Patent
Formation isolation and testing apparatus and method
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TLDR
In this paper, an apparatus and method for obtaining samples of pristine formation fluid, using a work string (6) designed for performing other downhole work such as drilling, workover operations, or re-entry operations.Abstract:
An apparatus and method are disclosed for obtaining samples of pristine formation fluid, using a work string (6) designed for performing other downhole work such as drilling, workover operations, or re-entry operations. An extendable element (24, 26, 45) extends against the formation wall to obtain the pristine fluid sample. While the test tool (16) is in a standby condition, the extendable element (24, 26, 45) is withdrawn within the work string, protected by other structure from damage during operation of the work string (6). The apparatus is used to sense downhole conditions while using a work string (6), and the measurements taken can be used to adjust working fluid properties without withdrawing the work string (6) from the bore hole (4). When the extendable element (24, 26, 45) is a packer (24, 26), the apparatus can be used to prevent a kick from reaching the surface, adjust the density of the drilling fluid, and thereafter continuing use of the work string.read more
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References
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Patent
Method and apparatus for the determination of formation fluid flow rates and reservoir deliverability
TL;DR: In this paper, a method and apparatus for measuring fluid flow rates, reservoir deliverability and/or the absolute open flow (AOF) potential of a subterranean formation penetrated by a wellbore is described.
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Apparatus and method for accurately measuring formation pressures
TL;DR: In this article, a simple mathematical model can be used for determining formation pressure, formation permeability, supercharging, and mudcake characteristics from the data obtained, generally during the first minute of testing.
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Method and apparatus for obtaining selected samples of formation fluids
TL;DR: In this article, a downhole tool equipped with an inflatable double packer for isolating an interval of the bore hole coupled with a hydraulic pump is used to sample and test bore hole fluids, transmitting the results obtained from such testing to the surface for determination whether or not the particular sample undergoing testing should be collected and brought to surface.
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Multiple chamber earth formation fluid sampler
TL;DR: In this paper, a multiple CHAMBER SAMPLING system for OBTAINING FLUID SAMPLES from EARTH Formations whereIN a BOREHOLE EXPLORING UNIT supported for MOVEMENT THROUGH the BORE HOLE is PROVIDED with SPACED MEANS for isolating BoreHOLE WALL Formation PORTions from BORE-HOLE FLUIDS.
Journal ArticleDOI
In-situ optical fluid analysis as an aid to wireline formation sampling
A.R. Smits,D.V. Fincher,Katsuhiko Nishida,Oliver C. Mullins,Robert J. Schroeder,Tsutomu Yamate +5 more
TL;DR: In this article, the authors describe the basic theory of operation for a newly developed wireline tool that uses optical principles for continuous analysis of fluid in the flowline of a wireline formation fluid sampler.