The jack-up rigs are moved alongside a well platform, jacked up and then the derrick is moved out over the platform allowing them to drill a new hole or do maintenance work on the well from the already established platform.
Workover
An upside down and backwards look at things.
The jack-up rigs are moved alongside a well platform, jacked up and then the derrick is moved out over the platform allowing them to drill a new hole or do maintenance work on the well from the already established platform.