Offshore staff
ABERDEEN — Well integrity specialist HydraWell has released a new technology for plug and abandonment (P&A) activities and announced the first successful campaign using HydraCT, the latest development in its Perforation, Wash & Cement (PWC) technology.
The Norway-based company says the HydraCT is an advanced PWC system specifically designed for coil tubing applications with the potential to cut CO2 emissions by 80% and reduce costs by up to 60%.
According to HydraWell, it is the only company globally offering this technology.
The successful debut of HydraCT in North Slope, Alaska, in November was the first project of its kind to use coil tubing, eliminating the need to mobilize a rig to site. By running coil tubing as the deployment method, the rigless HydraCT campaign spanned less than 24 hours, "signaling a huge step change for the future of P&A activities," the company said.
In another case study, PWC eliminated five days from the estimated operational timings of a P&A campaign. It was for an undisclosed supermajor in the Central North Sea, UKCS, for subsea production gas wells.
Offshore applications
HydraCT and the technology also has offshore potential.
A HydraWell spokesperson told Offshore magazine, "HydraCT is a key steppingstone on ‘the road to rigless,’ where complex well abandonments can be undertaken without the need to mobilize a rig or workover unit to pull casing and tubulars.
"HydraWell used CFD modelling to predict that the fluid circulation paths achieved downhole would eliminate any risk of a residual leak-path, and the operator validated the barrier by drilling out inside the inner cement and carrying out an azimuthal cement bond log.
"With the ever-wider range of casing sizes and mud weights being considered for PWC, it is imperative that condition-specific CFD is used to validate the application of the technology in specific circumstances."
12.08.2022
