Portable seabed penetration system

Patent · Tue Feb 25 04:00:00 EST 1986

OSTI ID:5921522

Mahar, L J; Douglas, B J

This patent describes a seabed penetration system which consists of: a support disposed over the portion of the seabed to be penetrated; a casing string depending from the support; a suction anchor secured to the lower end of the casing string; a push rod string slideably extending from the support through the casing string to the seabed; a seabed penetration member on the lower end of the push rod string; pump means in communication with the interior of the suction anchor to evacuate the latter and thereby temporarily anchor the casing string to the seabed; and means on the support connected to the upper ends of the casing string and the push rod string to concurrently tension the casing string and urge the push rod string downwardly to thereby effect penetration of the seabed by the seabed penetrating member, with the push rod string being restrained against buckling by the casing string. A method is described of penetrating the seabed below a body of water with a seabed penetrating member, the method including the steps of: lowering a suction anchor through the water to the upper surface of the seabed on a casing; inserting a push rod string that carries the seabed penetrating member downwardly through the casing until the penetrating member is adjacent the seabed; evacuating the suction anchor to temporarily secure the lower end of the casing string to the seabed; and tensioning the casing string while forcing the push rod string downwardly to embed the penetrating member in the seabed to thereby prevent buckling of the push rod string.

• Assignee: Earth Tech. Corp., Long Beach, CA
• Patent Number(s): US 4572304
• OSTI ID: 5921522
• Country of Publication: United States
• Language: English

Related Subjects

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ANCHORS
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
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MATERIALS HANDLING
MECHANICAL STRUCTURES
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STRAINS
SUPPORTS
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