A compliant tower (CT) is a fixed rig structure normally used for the offshore production of oil or gas. The rig consists of narrow, flexible (compliant) towers and a piled foundation supporting a conventional deck for drilling and production operations.
A drillship is a merchant vessel designed for use in exploratory offshore drilling of new oil and gas wells or for scientific drilling purposes. In most recent years the vessels are used in deepwater and ultra-deepwater applications, equipped with the latest and most advanced dynamic positioning systems.
Fixed platform rigs As the name indicates, this type of rig is located on a fixed structure previously installed at the well location. The structure may be a fixed jacketed platform, spar, tension leg platform (TLP), or gravity structure; whatever it is, the rig sits atop it.
Oil has been produced from offshore locations since the late 1940s. Originally, all oil platforms sat on the seabed, but as exploration moved to deeper waters and more distant locations in the 1970s, floating production systems came to be used. The first oil FPSO was the Shell Castellon, built in Spain in 1977.
GRAVITY BASED PLATFORMS: Formidable structure, easier construction, re-use all favor gravity based platforms 02/01/2001 The gravity based platform has a considerable history offshore, but the variety of new gravity concepts is evidence of an industry continually seeking new and more economic ways to develop oil and gas reserves.
A toolpusher, or "pusher," is the foreman for a drilling crew at an oil rig or other extraction site. As the supervisor on location, the toolpusher is responsible for his drillers, but performs primarily administrative tasks such as ordering and maintaining the proper equipment and materials.
A semi-submersible platform is a specialised marine vessel used in a number of specific offshore roles such as offshore drilling rigs, safety vessels, oil production platforms, and heavy lift cranes. They are designed with good stability and seakeeping characteristics.
A tension-leg platform (TLP) or extended tension leg platform (ETLP) is a vertically moored floating structure normally used for the offshore production of oil or gas, and is particularly suited for water depths greater than 300 metres (about 1000 ft) and less than 1500 metres (about 4900 ft).