Houlder’s Subsea Pile Foundation Template is used to fix the relative positions and verticality of piles on the seabed to ensure that jacket legs fit into the pre-installed piles. It is also capable of providing a corrective moment to the pile to resolve any misalignment.
The template will be deployed to the seabed and shall be used to guide and secure the pile during hammering and/or drilling operations.

Click here to download the Subsea Pile Foundation Template brochure

The benefits of the tool are;

• Designed for 2.5m diameter piles, but can be used for smaller piles through minor adjustment
• Can allow for range of hammer sizes and as the Jaws can open fully and a follower is not necessary
• Mud mat design can be amended to meet with project specifics, to be agreed during detailed design and depending on Jetting Options
• Design keeps vessel integration requirements to a minimum
• The jaws can retract keeping deck space to a minimum
• The system has a clamping mechanism meaning that it can support 3 or 4 piles on the seabed at one time and still maintain on bottom stability
• The jaws have deep pads in contact with the pin pile reducing the loads on the pile to within the pile’s capacity

Key features are;

• Quick to deploy and recover
• Can accommodate 5° soil level changes
• Can be deployed / recovered utilising a single or dual point lift
• Open design means passing through water will allow for ease of flow
• The mud mat can be set at 5° angle during lowering through the splash zone meaning less forces
• during the transition
• Mud mat will be designed to allow easy release from seabed, depending upon soil conditions a jetting system can be added to ease the release
• Fully opening jaws allows for full retraction avoiding risk of pile jamming in the structure
• Fully opening jaws allow piles to be hammered to very low stick-up heights if required, as
• the hammer can pass through the open jaw
• Does not require a follower
• Use of all jaws allows relative pile position to be maintained
• Can hold pile during changes from vibro to hydraulic hammers
• Integrated inclinometers and cameras can be fitted to allow to maintain and monitor  verticality of pile
• Has an ROV interface panel for intervention if required

Operational durations are as follows;

• Jaw opening: 4min
• Jaw Closing: 6min
• Jaw Lock/Unlock: 1min
• Pile Levelling Cylinder (Each): 5min
• Template levelling process: 10min