To clean out or work on a well to restore or increase production.
Maintenance procedures carried out on an existing oil or gas well in order to restore or increase production.
Operations on a producing well to restore or increase production. Tubing is pulled and the casing at the bottom of the well is pumped or washed free of sand that may have accumulated. In addition to washing out sand and silt that has clogged the face of the formation, a workover may also include an acid treatment, hydrofracing, or plugging off a depleted zone and opening a new zone for production.
Operations on a producing well to restore or increase production. A workover may be performed to stimulate the well, remove sand or wax from the wellbore, to mechanically repair the well, or for other reasons.
The process whereby a completed production well is subsequently re-entered and any necessary cleaning, repair and maintenance work done.
A maintenance job on a well usually to replace equipment or to stimulate production.
Remedial work to the equipment within a well, the well pipework, or relating to attempts to increase the rate of flow.