Historical well-file review
Review construction, drilling, completion, intervention, pressure, cement, production, and prior-abandonment records to define the well configuration, identify information gaps, and surface known risks.
Well plugging and closure
Well abandonment and decommissioning
Engineering-led support that moves an inactive, uneconomic, orphaned, or problem well from historical review and field assessment through a practical, well-specific abandonment program and documented closure.
Plain-language explanation
What well abandonment actually means
Well abandonment—often called plugging and abandonment—is the downhole work used to permanently close a well. The objective is to prevent oil, gas, formation water, or other fluids from moving between underground formations or reaching the surface after the well is no longer in use.
Decommissioning is the broader closure effort around that downhole work. It can include removing tubing, rods, wellhead equipment, tanks, lines, and surface infrastructure; correcting earlier abandonment work; cutting and capping the casing; managing affected soil or water; and restoring the site in accordance with the approved program and jurisdictional requirements.
When this service is needed
Signals that a project needs attention.
A well has reached the end of its productive or useful life.
A legacy or orphan well has no active operator or has incomplete closure records.
Testing identifies pressure, gas migration, vent flow, fluid movement, or a barrier concern.
Previous abandonment work needs to be located, drilled out, verified, or repaired.
A property transaction, redevelopment, regulatory order, or reclamation plan requires permanent closure.
Typical support scope
Field inspection and condition verification
Assess site access and wellhead condition, document field observations and pressures, and coordinate appropriate surface casing vent-flow or integrity screening before detailed planning.
Well-specific execution planning
Translate the available records and verified field conditions into a practical step-by-step program covering crews, equipment, materials, safety considerations, contingencies, verification, and regulatory documentation.
Downhole preparation
Coordinate removal of rods, tubing, pumps, previous devices, or other equipment that interferes with the approved abandonment program.
Barrier placement and remediation
Support bridge plugs, retainers, cement plugs, cement squeezes, circulation, porous-zone isolation, and repairs to deficient prior work.
Verification and surface closure
Coordinate logging, pressure monitoring, vent-flow testing, cut-and-cap preparation, equipment removal, and restoration records.
Field-ready program development
Engineering that translates into controlled field execution.
A sound abandonment design must be usable by the people performing the work. Grindstone can turn well records, field observations, regulatory requirements, and engineering decisions into a coordinated program for supervisors, service companies, owners, and prime contractors.
Well control and technical execution
Wellbore configuration review and operational sequencing
Well-control, pressure, and equipment-function testing
Tubular recovery, wellbore preparation, and obstruction planning
Mechanical-barrier, cement-placement, and verification coordination
Field supervision and safety
Site-specific emergency and hazard planning
Pre-job meetings, competency checks, and task-change controls
Qualified wellsite supervision and contractor coordination
Ground-disturbance, dangerous-goods, and worksite-control considerations
Project controls and documentation
Daily operations, cost, and fluid-movement reporting
Field-ticket, equipment, and material-transfer tracking
Regulatory notifications, test records, and wellbore updates
Final operating package and project handover documentation
Environmental and material stewardship
Fluid containment, reuse, hauling, and disposal coordination
Surface-staining, debris, and work-area cleanup
Surplus-material and rental-equipment accountability
Preparation for cut-and-cap, remediation, and site restoration
How the work moves forward
A controlled path from problem definition to documented completion.
Review and verify
Study the historical well file, identify missing or conflicting information, inspect current site and wellhead conditions, and document relevant pressure or integrity observations.
Engineer the program
Develop a well-specific execution plan that aligns the owner, engineer, regulator, prime contractor, crews, equipment, materials, safety requirements, verification criteria, and contingencies.
Execute and verify
Complete the approved downhole work while recording depths, volumes, pressures, returns, tests, and any field changes.
Close and document
Prepare for final cut-and-cap, surface decommissioning, site restoration, and the records required by the project and jurisdiction.
What successful support produces
Clear field progress and defensible records.
Historical records and current field conditions brought into one organized technical picture.
A clear, well-specific execution program prepared for field coordination.
Subsurface zones isolated through an approved barrier program.
Known equipment and prior-abandonment complications addressed.
Field measurements and verification results documented.
Owners and prime contractors receive an organized record for project closeout.
Working with owners and prime contractors
Grindstone can support a complete scope or a defined portion of a prime contractor’s program. The exact work plan depends on well construction, condition, available records, approved engineering, regulator requirements, contractor qualifications, and site-specific risk.
Start a project conversationNeed to clarify a difficult scope?
Start with the site, well, schedule, and support you need. Mike or Clive will help identify the practical next conversation.