Remedial work done to the equipment within a well, the well pipe work, or   relating   to attempts to increase the rate of flow.

Source: IADC UBO / MPD Glossary, December 2011. Global Standards


“Workover” means a procedure the operator undertakes that is intended to increase production but is not routine maintenance and includes:

  1. re-entry into the well to drill deeper, to sidetrack to a different location, to recomplete for production or to restore production from a zone that has been temporarily abandoned;
  2. recompletion by re-perforation of a zone from which gas or oil has been produced or by perforation of a different zone;
  3. repair or replacement of faulty or damaged casing or related downhole equipment;
  4. fracturing, acidizing or installing compression equipment; or
  5. squeezing, cementing or installing equipment necessary for removal of excessive water, brine or condensate from the well bore in order to establish, continue or increase production from the well.

Source: Oil and Gas, New Mexico Administrative Code Title 19, Chapter 15, January 2013. Regulations



an operation in which a well is re-entered for the purpose of maintaining or repairing it.

Regulation 2, DCR.

Source: Oil & Gas UK, Guidelines on subsea BOP systems, Issue 1, July 2012, Global Standards



“Workover” means an operation on a completed well that requires removal of the Christmas tree or the tubing (reconditionnement.

Source: Canada Oil and Gas Drilling and Production Regulations, SOR/2009-315, February 2013. Regulations

Source: Drilling and Production Guidelines, The Canada-Nova Scotia Offshore Petroleum Board and Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada, March 31, 2011. Regulatory Guidance

Source: Nova Scotia Offshore Petroleum Drilling and Production Regulations, SOR/2009-317, Canada, current to May 31, 2012. Regulations

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