Abstract
A North Sea operator required a precise depth control method to enable coiled tubing (CT) conveyed perforating guns to be deployed in a single trip on a HPHT development project. During the initial development phase, the preferred method identified was to use CT logging reels to convey the perforating guns. This solution was however considered expensive and had associated concerns regarding electric-connection problems. It was determined that the use of a wireless coiled tubing collar locator (CTCL) would eliminate the need for CT logging reels. However, the CTCLs available at that time were not suitable for operation in these extremely high pressure/ high temperature (HPHT) wells.
This paper discusses the perforation technologies available to the operator, and the development of a wireless (HPHT) CTCL which solved the operator’s depth-control concerns.
