Workover rig

A workover rig is a specialized drilling rig used in the oil and gas industry for performing workover operations on existing wells. Workover operations refer to a range of maintenance, repair, and remedial activities conducted to optimize or restore the productivity of a well.

Workover rigs are designed to handle various tasks, including:

– Well intervention. Workover rigs are used to access the wellbore for interventions such as removing debris or scale, cleaning out sand or other obstructions, or repairing damaged or malfunctioning downhole equipment.

– Completion changes. Workover rigs are employed to make changes or modifications to the well completion, which involves altering the configuration of the casing, tubing, and production equipment. This allows for adjustments to production zones, installation of new equipment, or optimizing the flow of fluids.

– Stimulation and enhancement. Workover rigs are utilized to stimulate the production of hydrocarbons by performing operations such as acidizing, fracturing, or re-perforating the reservoir. These techniques help increase the permeability of the formation and improve the flow of oil or gas into the wellbore.

– Plugging and abandonment. Workover rigs are involved in plugging and abandoning wells that have reached the end of their productive life or are no longer economically viable. This process requires the proper sealing and isolation of the well to prevent any potential environmental or safety risks.

Workover rigs are typically smaller and more mobile compared to drilling rigs. They can be truck-mounted, skid-mounted, or trailer-mounted, allowing for easier transportation between well locations. Workover crews, consisting of skilled operators and technicians, operate these rigs and perform the necessary tasks under the supervision of a wellsite supervisor.

Workover operations are conducted to maintain or enhance the productivity of existing wells, extend their lifespan, and maximize recovery from reservoirs. They play a vital role in the overall lifecycle management of oil and gas wells, ensuring optimal production and efficiency while minimizing downtime and costly interventions.