New top-drive casing alignment tool
Here’s the T-CAT top-drive casing alignment tool, a new system that offers a simple, safe approach to running tubulars.
This state-of-the-art tool makes it possible to run tubulars without carrying out hazardous stabbing board operations, the company says. By using the tool, tubulars can be made up directly on the rig floor. Operated remotely by one technician, the operator uses the tool to pick up the tubular from the catwalk. The technician then positions it and makes it up in the rotary. The entire process is achieved without a stabber and is operated from the rig floor.
The tool is designed to handle casings of any size, so it is adaptable. Virtually any casing can be run directly from the drillfloor, which helps minimize manual handling of the casing. In addition, the tool is easily rigged up and down, unlike systems that must be permanently installed on the rig’s derrick.
Recently, the company used the T-CAT to run tubulars for Talisman Energy (UK) Ltd. from the Sedco 714 semisubmersible drilling unit in the North Sea. The company says its system proved to be reliable when running 133⁄8 in. buttress casing in marginal weather conditions. Casing was run with remote operation provided by a casing running technician. This eliminated the requirement for a stabber, making for a less hazardous operation, the firm points out. Running rates were good, especially given the type of connection and weather conditions, said a spokesman for Talisman Energy.
The company designed the tool to keep tubular handling to a minimum and to manipulate the tubular with great care. As a result, the tubular is much less likely to be damaged, preventing costly repairs.
Source: BJ Tubular Services, c/o Spinnaker Communications, 11 Walker Place, St. Andrews, Scotland KY169NY.
