Section milling, cement barrier placement, and regulatory reporting for end-of-life wells, onshore and offshore.
Well abandonment is the final chapter of any well’s lifecycle, and it must be done correctly the first time. Inadequate cement barriers or incomplete documentation can leave operators liable for decades. Regulators are scrutinizing P&A operations more closely than ever, with BSEE and state agencies requiring verified barrier placement, pressure testing, and audit-ready documentation.
Cooper Contractors performs permanent well plug and abandonment (P&A) for offshore and onshore operators. Our P&A crews are trained in section milling, casing removal, cement barrier placement, and mechanical barrier verification. We work on platform wells, subsea wells, and onshore vertical or horizontal wells. Every barrier is pressure-tested and documented. Every regulatory submission is complete and audit-ready.
Our first-time barrier acceptance rate is 100%; we have never had a barrier rejected by regulators or required re-abandonment.
The P&A process begins with a well-specific engineering review: current completion schematic, cement bond logs, pressure history, and regulatory requirements. We then build a barrier plan that meets or exceeds minimum regulatory standards, typically including multiple verified barriers across all permeable zones. Our crews then execute section milling (removing a section of casing to access the annulus), cement placement via displacement or hesitation squeeze, and barrier verification via tag tests, weight checks, or pressure testing.
Here are some frequently asked questions.
100%. Cooper Contractors has never had a cement barrier rejected by BSEE, BOEM, or a state regulator. We place barriers conservatively, pressure-test every barrier, and document every step. If a barrier does not meet specifications, we mill it out and replace it before demobilization — no exceptions.
Both. We offer turnkey P&A project management including engineering, permitting, field execution, and regulatory reporting. We also provide crew-only P&A services for operators managing their own abandonment programs. Either way, you receive the same barrier placement standards and documentation quality.
Average abandonment timeline is 30–45 days per well for offshore platform wells, depending on depth, number of barriers required, and conductor removal requirements. Onshore vertical wells typically require 10–20 days. Shallower wells or single-barrier abandonments may take less time. We provide a site-specific timeline with every proposal.
