Hydraulic piston coring--A new era in ocean research
In December of 1978, the Deep Sea Drilling Project, International Phase of Ocean Drilling, deployed the first hydraulically actuated piston corer. This coring system utilized a hydraulic piston principle. Fluid was pumped through the drill pipe, activating a piston driven core barrel which was ejected into the sediment at the rate of approximately 20 feet per second. This extremely high penetration rate effectively decoupled the core barrel from the heave induced vertical motion of the drill string. On completion of each coring operation, the core barrel assembly was retrieved by wireline. The core bit was then ''washed'' down to the next coring point where the piston coring procedure was repeated. Operational tests conducted in 865 meter water depth curing Leg 64 obtained in almost totally undisturbed and complete section from a 152-meter hole along the Guaymas slope in the central Gulf of California. Variations in climate, productivity and circulation for more than 250,000 years were recorded. This paper describes the analysis, design, testing and field operation of the hydraulic Piston Coring System.
- Research Organization:
- Univ. of California, San Diego
- OSTI ID:
- 5304445
- Report Number(s):
- CONF-830514-
- Journal Information:
- Offshore Technol. Conf.; (United States), Vol. 3; Conference: Offshore technology conference, Houston, TX, USA, 2 May 1983
- Country of Publication:
- United States
- Language:
- English
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