Multiple Pipeline Blockages in Flowline Removed by PipeRenew® Process

• TIF (Think Incident Free) planning to ensure the work can be completed incident free.

• Conduct daily JSA and tailgate meetings to communicate the work to be performed and the possible hazards

  associated with the job.

1. Confirm tie-in point. Verify current flowline pressure and MAOP. Rig-up and test all necessary equipment.

2. Mix PipeRenew^® solution at 8% concentration.

3. Start injecting PipeRenew^® into the flowline while monitoring pressures and signs of communication.

4. Once the line is full or the line pressure reaches MAOP, cease pumping and monitor receiving point for signs of communication.

5. Allow PipeRenew^® solution to soak in the line until a drop in pressure or communication has been achieved. NOTE: A drop in pressure indicates the plugged material has been penetrated or released, and additional amounts of PipeRenew^® can then be added to continue the process.

6. Continue to treat the line with PipeRenew^® until full communication has been established between tie-in and receiving points.

7. Once full communication has been established, perform high-rate water sweep to flush the line completely clean.

Blended 14 bbls of PipeRenew^® solution at an 8% concentration and began injecting into the flowline. Started pumping at a rate of 0.50 bbls per minute. The line pressure increased to 1,000-psi after injecting 3 bbls. Shut down pump and monitored line pressure.

NOTE: The run of the line from the pumping end to the receiving end consisted of a gradual downward slope to a creek bottom and then a gradual upward slope to the receiving end. Because the density of PipeRenew^® was greater than that of any production fluids that were present in the line, the PipeRenew^® solution was able to gravitate down to the face of the blockage, which was believed to be primarily at the bottom of the creek bed, or lowest point of the line.

Pressure bled back to 500-psi in 3 minutes. Repeated the pump-and-bleed process, pressuring up to 1,000-psi, and allowed pressure to bleed back to 500-psi. Shut in line with 800-psi to allow the PipeRenew^® solution to soak overnight.

Upon arriving on location the following day, the line pressure recorded at the pumping end was 0-psi, while the line pressure recorded at the receiving end was 7-psi. Continued the pump-and-bleed process with readings ranging from 1,200-psi to 500-psi. After pumping 14 bbls of PipeRenew®, the line pressure fell to 0-psi, indicating we had penetrated the core of the blockage.

NOTE: The exact number of plugs or blockages contributing to the consistent rise in differential flowing pressure was unknown. However, based on the fact we experienced several significant drops In pressure throughout the pumping process, we believed, more than likely, the line contained numerous plugs throughout.

Full communication was established at this point. The line was fully displaced with PipeRenew^® (30 bbls) and shut in at 70-psi to soak.

After the soaking period was completed, a high-rate flush with water was performed. 5 bbls of paraffin solids were recovered and the flowline was immediately put back into service.

Conclusion