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How Workover Rigs Are Used

Workover rigs, also recognized as pulling units, make up unique petroleum structures for inserting or tearing pipe tubing to and from reservoirs. Workover crews are requested when the oil source has been drilled, is undergoing restoration, or is being retired. Compared with other drilling crews, workover rig teams are relatively tinier.

Uses For Workover Rigs 

Workover rigs are used to replace old wells with a new completion. This occurs because of a well deteriorating or any other change in reservoir conditions. For example, tubing, safety valves, pumps, etc. can deteriorate. Worn down parts can be hazardous and unworkable for the current job. Changing reservoir conditions is noted when the flow of the well has decreased over a length of time. This means when it was first drilled, the tubing was suitable for large flows of oil and gas, but now smaller tubing would be necessary. 

Stuck Tubing

Tubing can get stuck when crews try to remove them from a well. Workover rigs may be needed to withdraw the stuck pipe. Then flow will be restored and upkeep can continue. Salt bridges are a common cause of stuck pipes. They are made when daily formation cycles keep saltwater in the annulus space. The area retains a saline trace after they wipe the water out. After months of pumping, a heavy layer of residue turns into bridges within the annular space. The salt bridges can slow down or halt production. Sometimes, freshwater is pumped through annular spaces, but it doesn't entirely prevent salt bridges from forming. 

Workover Rig Components

The rigs are controlled within the center with electricity. The workover rigs are sold in single drum form along with double drums. Many use a double telescopic mast and have a wide wheelbase with low, cross-section tires. The double telescopic mast is considered safer than other masts on the market. Manufacturers offer offshore and onshore workover rigs up to 1000 horsepower. 

Workover rigs are distinctive petroleum devices for inserting or tearing pipe tubing into and out of reservoirs. Workover teams are sought when the oil supply has been tapped, restored, or decommissioned. Workover rigs are used to change old wells. This typically happens because of well declining. Sometimes when workers attempt to extract them from a well, tubing can get trapped. Then workover rigs are called to remove the stuck pipe. When searching for workover rigs for sale, look for those that fit the criteria set by the American Petroleum Institute. There are many rigs offered at inexpensive rates for both onshore and offshore jobs.

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