BARAMAG® SWARF SEPARATION AND RECOVERY UNIT EFFECTIVELY HELP TO REMOVE OVER 95% OF SWARFDownload PDF
Plug & Abandonment (P&A) campaign comprised of multiple wells
Engineered at-surface solution included the BaraMag® Swarf Separation and Recovery Unit and BaraMag Flow Diverter for:
A major operator contracted Halliburton Baroid to assist with a Plug & Abandonment (P&A) campaign offshore UK, in the North Sea. The campaign was comprised of multiple wells, which needed a new casing milling technology to enable re-use of milling fluids (free from swarf)—without incurring HSE hazards or costly rig-up time.
The Baroid separation solutions team recommended the BaraMag® Swarf Separation and Recovery Unit for this P&A project. Designed to provide safe and effective handling of swarf, it removes ferrous metals from fluids while milling casing; thus, minimizing harmful impact on offshore equipment. Deployment proved successful in recovering over 95% swarf, while also avoiding non-productive time (NPT), HSE incidents, and service quality issues.
The operator’s key objective was to separate and contain the swarf material in collection skips to be carried away and disposed of. Failure to remove these harsh metallic particles can lead to excessive wear and tear on rig surface equipment; contaminate drilling fluids; and expose personnel to health, safety, and environmental (HSE) risks. Removal of swarf from milling fluid requires a reliable and efficient means of separation at the surface to ensure successful operations. In this case, traditional solids-control shale shakers would be inadequate given the large quantity of swarf to be removed.
The BaraMag Swarf Separation and Recovery Unit was identified as the optimal solution due to its effective removal of particles and strands of ferrous and ferromagnetic metals from drilling fluids when conducting operations, such as milling, abandonment, slot-recovery, or side-tracks. This is accomplished in two stages via mechanical and magnetic means:
Return flow from the well passes through the unit, with the first stage capturing the majority of the swarf and discarding the material into a collection skip.
A second separation and polishing stage removes fine to ultra-fine magnetic particles that may still be entrained in the fluid.
In the first phase of the campaign, eight wells were plugged and abandoned, with a total of 18 sections milled in the wells; wherein, the BaraMag unit was rigged up and rigged down. The BaraMag® Flow Diverter was also employed for each milling job. A rig-up time of 24 hours (simultaneously with rig operations) ensured that the operator met the timeline requirements of their P&A program.
The main accomplishments were:
This first utilization of the BaraMag system allowed the operator to cost-effectively mill and handle returned swarf on surface without NPT or HSE incidents. The economic value of the returned milling fluid and the minimization of waste were crucial in successful milling and ultimate completion of the P&A job scope, maximizing operator asset value.