Changes

Wellbore workovers can include casing or equipment repair, but may also simply involve cleaning out fill over the producing zone or circulating chemicals to remove scale or paraffin.

Wellbore workovers can include casing or equipment repair, but may also simply involve cleaning out fill over the producing zone or circulating chemicals to remove scale or paraffin.

Many workovers involve the installation, maintenance, and repair of artificial lift equipment in the wellbore (see [[Artificial lift]]). About 85% of the oil wells in the United States are on some form of artificial lift. Approximately 85% of those wells are on rod pump, 10% on gas lift, and 5% on submersible or hydraulic pumps. Rigs are required for most artificial lift workovers; however, many gas lift wells can be serviced with a wireline.

Many workovers involve the installation, maintenance, and repair of [[artificial lift]] equipment in the wellbore. About 85% of the oil wells in the United States are on some form of artificial lift. Approximately 85% of those wells are on rod pump, 10% on gas lift, and 5% on submersible or hydraulic pumps. Rigs are required for most artificial lift workovers; however, many gas lift wells can be serviced with a wireline.

==Workover equipment==

==Workover equipment==