A method of anchoring an offshore platform to the ocean floor

Patent · Tue Apr 26 04:00:00 EDT 1988

OSTI ID:6916173

Saffrhan, R W

A method of anchoring an offshore platform to the ocean floor in deepwater locations wherein the platform includes a skirt pile sleeves fixedly secured to the lower end of the platform around the periphery thereof, is described comprising: providing each pile sleeve with valved port means through the wall thereof to form concrete group injection port means, positioning the platform at a selected location on the ocean floor, driving a pile through each of a selected number of pile sleeves and into the ocean floor whereby an annular space is formed between each pile and its surrounding sleeve, providing grouting equipment including a group pump on a facility above the surface of the ocean, lowering through the water from the facility into the vicinity of the skirt pile sleeves one end of a grout hose, connecting the upper end of the grout hose to the grout pump at the surface and the lower end of the grout hose to the valved port means in the wall of one of the pile sleeves, pumping grout down the grout hose and through the port means in the sleeve and into the annular space between the sleeve and the pile therein until the annular space has been filled with grout with a selected minimum density, closing the port means of the sleeve into which grout was injected, disconnecting the discharge end of the grout hose from the port means and successively transferring the hose to the grout injection port means of each pile sleeve to be grouted, and pumping grout thereinto whereby a concrete bond is formed between each pile and its surrounding pile sleeve.

• Assignee: Shell Offshore Inc., Houston, TX
• Patent Number(s): US 4740110
• OSTI ID: 6916173
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
423000 -- Engineering-- Marine Engineering-- (1980-)
ANCHORS
FABRICATION
FASTENING
GROUTING
INSTALLATION
JOINING
MATERIALS HANDLING
NATURAL GAS WELLS
OFFSHORE PLATFORMS
OIL WELLS
POSITIONING
WELLS