Influence of lubricants and polymer coatings on penetration of oceanographic coring tools

Journal Article · Sun Dec 01 00:00:00 EST 1968 · Gov. Rep. Announce. (U.S.); (United States)

OSTI ID:5592914

Erchul, R A

The friction developed on the inner and outer faces of oceanographic coring tubes tends to decrease penetration and gross recovered length and to increase sample disturbance. An effort was made to decrease this friction through use of lubricants and polymer coatings and to thereby increase the penetration of smooth steel surfaces into fine-grained sediments. Tests were conducted in the laboratory using steel plates and an Atwood test apparatus, and at sea using gravity corers. In the laboratory tests, the lubricants STP, CRC, zinc grease, and lithium grease increased penetration 46, 25, 24, and 20% respectively. Tests at sea showed that use of STP lubricant increased corer penetration 18 and 35% and gross recovery length of cores 16%. Statistical analysis indicated that the above increases were highly significant.

• OSTI ID: 5592914
• Journal Information: Gov. Rep. Announce. (U.S.); (United States), Vol. 71:13
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CORING EQUIPMENT
LUBRICANTS
BENCH-SCALE EXPERIMENTS
COATINGS
DRILL CORES
FRICTION
OFFSHORE DRILLING
POLYMERS
SEAS
SEDIMENTS
STATISTICS
STEELS
TUBES
ALLOYS
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
IRON ALLOYS
IRON BASE ALLOYS
MATHEMATICS
SURFACE WATERS
420206* - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)