|Publisher||Society of Petroleum Engineers||Language||English|
|Content Type||Conference Paper|
|Title||Selective Isolation of Perforated Liners Using Casing Patches: Case Studies from North Sea Operations|
|Authors||Charles Forbes, Weatherford U.K. Ltd.; Ian Taggart, Shell UK Exploration & Production Ltd.|
IADC/SPE Drilling Conference, 3-6 March 1998, Dallas, Texas
|Copyright||1998. IADC/SPE Drilling Conference|
Figures are not available for this paper.
The Weatherford Internal Steel Liner casing patch has been used for many years to mechanically seal off perforations when the completion has been pulled for workover operations.
Recent work has shown that it is possible to carry out this operation with the completion still in place using a Coiled Tubing (CT) or Hydraulic Workover Unit (HWU) to run the Patch. This has offered substantial technical and economic advantages.
The latest development of the tool, a mechanical patch to pass through a 4" restriction and set in a 7" 29ppf liner and will address the majority of North Sea wells.
This Patch system offers an effective mechanical seal option to reduce water production.
|File Size||268 KB||3|