Reducing trenching at mooring lines

Patent metadata

Field	Value
Publication number	US-10894581-B2
Application number	US-201916541806-A
Country	US
Kind code	B2
Filing date	Aug 15, 2019
Priority date	Aug 21, 2018
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

The present techniques are directed to systems and a method for reducing trenching around piles. An exemplary method includes attaching a mooring line to one end of a padeye extender bar that is coupled by another end to a padeye on the pile. The pile is installed in a sediment layer. The padeye extender bar is deployed to hold an attachment point for the mooring line above the sedimenlt layer.

First claim

What is claimed is:

1. A system for reducing trenching, comprising:
a pile configured to be disposed in a sediment layer and held in place by friction with the sediment layer;
a padeye mounted to the pile;
a padeye extender bar coupled to the padeye at one end, and attached to a mooring line at an opposite end, wherein the padeye extender bar is configured to support the mooring line above a surface of the sediment layer; and
a stop mounted proximate to the padeye configured to hold the padeye extender bar at an operational position.

2. The system of claim 1 , wherein the pile is a suction pile or a driven pile.

3. The system of claim 1 , wherein the padeye comprises a locking mechanism configured to lock the padeye extender bar in an operational position.

4. The system of claim 3 , wherein the locking mechanism comprises a ratchet mechanism.

5. The system of claim 1 , comprising:
a support bar padeye mounted proximate to an upper surface of the pile; and
a support bar coupled to the support bar padeye, wherein the support bar is configured to deploy to the padeye extender bar and lock to the padeye extender bar.

6. The system of claim 5 , wherein the support bar and the support bar padeye comprise deployment holes that are aligned when the support bar is in a vertical position and a deployment pin configured to be inserted through the aligned deployment holes to lock the support bar in the vertical position.

7. The system of claim 5 , wherein the support bar and the padeye extender bar comprise locking holes configured to accept a locking pin inserted through both locking holes to lock the support bar to the padeye extender bar.

8. The system of claim 5 , wherein the support bar is configured to be held in a vertical position by the mooring line during an installation.

9. The system of claim 5 , wherein the support bar comprises a wheel configured to allow the mooring line to hold the support bar in contact with the padeye extender bar when tension is placed on the mooring line.

10. The system of claim 9 , wherein the support bar and the wheel comprise:
wheel locking holes that align when the support bar is deployed to the padeye extender bar; and
a wheel locking pin configured to be inserted through the aligned wheel locking holes to hold the support bar in a locked position with the padeye extender bar.

11. A method for reducing trenching around a pile, comprising:
attaching a mooring line to one end of a padeye extender bar that is coupled by another end to a padeye on the pile;
installing the pile in a sediment layer;
deploying the padeye extender bar to hold an attachment point for the mooring line above the sediment layer;
deploying a support bar mounted to a support bar padeye disposed proximate to a top surface of the pile; and
locking the support bar to the padeye extender bar.

12. The method of claim 11 , comprising locking the support bar to the padeye extender bar by inserting a locking pin through aligned locking holes on the support bar and the padeye extender bar after deployment.

13. The method of claim 11 , comprising:
threading the mooring line over a wheel disposed on the support bar at an opposite end from the padeye mounting; and
using the mooring line to deploy the padeye extender bar and the support bar.

14. The method of claim 13 , comprising inserting a wheel locking pin through aligned wheel locking holes in the wheel and the support bar after deployment.

15. The method of claim 11 , comprising:
attaching the mooring line to a support bar at an end opposite to a coupling to a support bar padeye;
installing the pile in the sediment layer; and
releasing the mooring line from the support bar to deploy the support bar.

16. The method of claim 15 , comprising:
deploying the support bar and the padeye extender bar; and
inserting a locking pin through holes in the support bar and padeye extender bar that align when the support bar and padeye extender bar are deployed.

17. The method of claim 11 , comprising:
placing a support bar in a vertical position before deployment to align deployment holes on a support bar padeye and support bar; and
inserting a deployment pin through the aligned deployment holes to hold the support bar in the vertical position during deployment.

18. The method of claim 11 , comprising locking the padeye extender bar in a deployed position using a ratchet mechanism.

Assignees

• Exxonmobil Upstream Res Co

Inventors

• Wong Patrick C
• Arslan Haydar
• Lokken Roald T

Classifications

• B63B21/27

  by suction · CPC title

• B63B21/20 Primary

  Adaptations of chains, ropes, hawsers, or the like, or of parts thereof · CPC title

• E02B2017/0078

  Suction piles, suction cans · CPC title

• E02D5/226

  Protecting piles (piles with protecting cases E02D5/60) · CPC title

• E21B41/0007 Primary

  for underwater installations (E21B41/005, E21B41/04, E21B41/06, E21B41/08, E21B41/10 take precedence) · CPC title