By 
Well intervention services are aimed at boosting production to the optimal level, both onshore and offshore. Intervention specialists help in the maintenance, replacement, or repair of gas and oil wells. Well, interventions can be categorized into light and heavy-duty.
Light Interventions
It involves lowering sensors and tools into a well while maintaining pressure at the surface. Light duty interventions do not lead to the stoppage of production activities before making changes to the well equipment.
Service technicians use coiled tubing and wireline to carry out light interventions that reduce the chances of good blockage. Light duty services are used to adjust equipment such as underground pumps and valves.
Heavy Interventions
It involves the removal of all the pressure barriers and wellheads to allow access to the wellbore. Heavy-duty operations require a tube to uninstall and remove the wellhead. They are used to replace pumps and tubing strings that cannot be removed using light interventions.
Recompletions are part of a heavy-duty intervention that is done to plug and abandon an existing zone. The zone is then reconfigured to produce oil and gas from a secondary zone.
Offshore Intervention
These are intervention services that do not require the use of a rig and have the ability to perform downhole applications under pressure. Most of these techniques are aimed at increasing production and restoration. The services of offshore well intervention companies are needed in instances when there are flow restrictions, mechanical failure, and changes in the composition of the reservoir. Applications performed during the intervention include reservoir management and repair services, diagnostics, and well surveillance.
It is vital to choose the best equipment and technique to get the best outcome. The techniques used are coiled tubing, wireline, and hydraulic worker.
Coiled tubing
It involves the use of a continuous steel pipe to circulate fluids in the well. The tubing is flexible to allow it to be coiled into a reel. The development of modern alloys has increased the strength of tubes to prevent corrosion and withstand high pressure.
Coiled tubes allow fast running speeds in and out of a well and have reduced rig-up trips due to the availability of a continuous tube. It also allows for localized delivery of downhole fluids that increase tubing life and prevents acid contamination from the tubing scale.
Wireline
It involves the use of tools and equipment that are run in and out of the well by using a wire mounted on a powered reel. It is done on a well that is under pressure. The most common wireline services include cleaning wells, perforating, dumping cement, and logging.
Hydraulic workover
Hydraulic workover is more powerful than the coiled tubing technique and can handle more complex tasks with higher pressure and deeper reservoirs. A hydraulic worker uses a tapered pipe and can adjust its length depending on the depth of the reservoir. It is the most expensive technique, and its use depends on the specific requirements of the task and the allocated budget.
Hydraulic workover units can perform various workover tasks on the well as compared to the traditional approaches. They are more efficient in the repair and maintenance work.
Comments