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The intense nature of this operation often requires no less than the capabilities of a drilling rig. The workover begins by killing the well then removing the wellhead and possibly the flow line, then installing a B.
P commonly known as a blowout preventer , then lifting the tubing hanger from the casing head, thus beginning to pull the completion out of the well. The string will almost always be fixed in place by at least one production packer. If the packer is retrievable it can be released easily enough and pulled out with the completion string. If it is permanent, then it is common to cut the tubing just above it and pull out the upper portion of the string.
If necessary, the packer and the tubing left in hole can be milled out, though more commonly, the new completion will make use of it by setting a new packer just above it and running new tubing down to the top of the old.
Although less exposed to wellbore fluids, casing strings too have been known to lose integrity. On occasion, it may be deemed economical to pull and replace it. Because casing strings are cemented in place, this is significantly more difficult and expensive than replacing the completion string. If in some instances the casing cannot be removed from the well, it may be necessary to sidetrack the offending area and recomplete, also an expensive process.
For all but the most productive well, replacing casing would never be economical. From Wikipedia, the free encyclopedia. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources.
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Contact: workplace mentalhealth. Staying well Get help. These Working Well resources help workplaces prioritise mental health to ensure employees have improved wellbeing, greater morale and higher job satisfaction. Quick links to resources 1. Creating positive environments. Enhancing mental wellbeing. Minimising and Managing Workplace Stress.
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