Radiant energy – Geological testing or irradiation – With sampling
Patent
1992-01-23
1993-04-27
Fields, Carolyn E.
Radiant energy
Geological testing or irradiation
With sampling
250254, 175249, G01V 512
Patent
active
052065057
ABSTRACT:
A coring tool is lowered to the bottom of a wellbore through a subsurface formation. A coring bit at the lower end of the coring tool draws a core sample of the subsurface formation at the bottom of the wellbore into the coring tool. A coring barrel is positioned along the coring tool above and in juxtaposition with the coring bit. The core sample is drawn into a hollow cylindrical split member within the coring barrel, such member being split into two halves in an axial direction and comprised of a material effectively transparent to nuclear radiation. A wireline raises the split member containing the core sample upward through the coring tool to the surface of the earth. The core sample is tested for a nuclear radiation characteristic through the nuclear radiation transparent material of the split member at the well site. The split member is then reused to obtain a plurality of cores from the subsurface formation.
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"Slim Hole Drilling-Conclusion", K. B. Gunn, Oil & Gas Journal, May 13, 1991, pp. 51-55.
"Slimhole Continuous Coring and Drilling in Tertiary Sediments", S. B. Randolph and A. P. Jourdan, SPE/IADC Drilling Conf, Amsterdam, Mar. 11-14, 1991, Paper 21906.
"Mining Technique Finds Applications in Oil Exploration", E. P. Deliac, J. P. Messines & B. A. Thierree, Oil & Gas Journal, May 6, 1991, pp. 85-90.
"An Innovative Approach to Exploration and Exploitation Drilling: The Slim-Hole, High-Speed Drilling System", S. H. Walker and K. K. Millhelm, Journal of Petroleum Technology, Sep. 1990, pp. 1184-1191.
Fields Carolyn E.
Hager Jr. George W.
McKillop Alexander J.
Mobil Oil Corporation
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