IP Library › Granted Patent US 8,181,589
Granted Patent B2
US 8,181,589 · App. 12/605,454 · Granted May 22, 2012

Gravity anchor

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Quick Facts
Patent No.
US 8,181,589
App. No.
12/605,454
Granted
May 22, 2012
Kind
B2
Abstract

A gravity anchor that includes one or more anchor units. The units are designed to be rotationally linked together so that multiple units can be used to provide the required weight. The units are designed for ease of handling on the vessel and to control the rotation of the units relative to each other to insure proper orientation on the seafloor. The units are designed to help them dig into the sea bed and enhance the drag and holding power.

Claims (6)

1. A method for installing a gravity anchor on the sea floor from a vessel having a winch, without the use of a crane, comprising the steps;

a. providing two separate anchor units that are rotationally linked together, for limited rotation, in series on the deck of the vessel;

b. attaching a mooring line to the anchor unit farthest from the end of the vessel from which the gravity anchor will be deployed;

c. attaching a line from the winch on the vessel to the same anchor unit as the mooring line;

d. pulling the gravity anchor off the deck of the vessel with the mooring line and using the line from the winch on the vessel to control the descent of the anchor units to the sea floor; and

e. disconnecting the winch line from the winch after the gravity anchor is installed on the sea floor and attaching the winch line to a buoy.

Assignments (10)
SECURITY INTEREST Recorded Sep 24, 2019
From: MCDERMOTT, INC.; J. RAY MCDERMOTT, S.A.; MCDERMOTT INTERNATIONAL, INC.
To: CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK, AS COLLATERAL AGENT
Reel/Frame 050475/0213 →
RELEASE OF SECURITY INTEREST Recorded May 14, 2018
From: CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK
To: MCDERMOTT INTERNATIONAL, INC.; MCDERMOTT, INC.; J. RAY MCDERMOTT, S.A.; SPARTEC, INC.; MCDERMOTT SUBSEA ENGINEERING, INC.; MCDERMOTT MARINE CONSTRUCTION LIMITED
Reel/Frame 046144/0475 →
RELEASE OF SECURITY INTEREST Recorded May 14, 2018
From: WELLS FARGO BANK, NATIONAL ASSOCIATION
To: MCDERMOTT INTERNATIONAL, INC.; MCDERMOTT, INC.; J. RAY MCDERMOTT, S.A.; SPARTEC, INC.; MCDERMOTT SUBSEA ENGINEERING, INC.; MCDERMOTT MARINE CONSTRUCTION LIMITED
Reel/Frame 046144/0628 →
CORRECTIVE ASSIGNMENT TO CORRECT THE NATURE OF CONVEYANCE PREVIOUSLY RECORDED AT REEL: 026720 FRAME: 0826. ASSIGNOR(S) HEREBY CONFIRMS THE SECURITY AGREEMENT. Recorded Oct 8, 2014
From: AGRICOLE CORPORATION AND INVESTMENT BANK
To: J. RAY MCDERMOTT, S.A.
Reel/Frame 033940/0630 →
SECURITY INTEREST Recorded Apr 16, 2014
From: MCDERMOTT INTERNATIONAL, INC.; MCDERMOTT, INC.; J. RAY MCDERMOTT, S.A.; SPARTEC, INC.; MCDERMOTT SUBSEA ENGINEERING, INC.; MCDERMOTT MARINE CONSTRUCTION LIMITED
To: CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK, AS COLLATERAL AGENT
Reel/Frame 032700/0001 →
SECURITY INTEREST Recorded Apr 16, 2014
From: MCDERMOTT INTERNATIONAL, INC.; MCDERMOTT, INC.; J. RAY MCDERMOTT, S.A.; SPARTEC, INC.; MCDERMOTT SUBSEA ENGINEERING, INC.; MCDERMOTT MARINE CONSTRUCTION LIMITED
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 032700/0142 →
RELEASE OF INTELLECTUAL PROPERTY SECURITY AGREEMENT FOR PATENT, RECORDED ON REEL 024337, FRAME 0604 Recorded Apr 16, 2014
From: CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK
To: J. RAY MCDERMOTT, S.A
Reel/Frame 032705/0288 →
SECURITY AGREEMENT Recorded Aug 9, 2011
From: J. RAY MCDERMOTT, S.A.
To: CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK, AS COLLATERAL AGENT
Reel/Frame 026720/0826 →
SECURITY AGREEMENT Recorded May 5, 2010
From: J. RAY MCDERMOTT, S.A.
To: CREDIT AGRICOLE CORPORATE AND INVESTMENT BANK, AS COLLATERAL AGENT
Reel/Frame 024337/0604 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 26, 2009
From: PETERSEN, JIM B., MR.; JOE-JOE, CHELLAKAT SATYARAJ, MR.
To: J. RAY MCDERMOTT, S.A.
Reel/Frame 023421/0392 →