2019年12月10日 · In General, there are six casing types used in drilling onshore and offshore wells, learn more about their application, common depths design

2021年10月2日 · There are six basic types of casing strings: Conductor casing is the first string set below the structural casing (i.e., drive pipe or marine conductor run to protect loose near-surface formations and to enable circulation of drilling fluid). The conductor isolates unconsolidated formations and water sands and protects against shallow gas.

Types of Casings and Functions. There are five main types of casings. The Conductor Casing or stove pipe; The Surface Casing; The Intermediate Casing; The Production casing; The Production Liner System – Liner set through the productive interval and landed inside the casing on a hanger or with tieback to the surface; The main function of ...

2024年1月21日 · Current Types of Casing in Use in Oil and Gas Industry: Conductor Pipe: Extending from the surface to a shallow depth, the conductor pipe is used to protect near-surface unconsolidated formations, seals off shallow-water zones, and protects against shallow gas flows.

2024年6月7日 · There are five main types of casing used in oil and gas drilling, each serving a specific purpose and designed with unique properties: Conductor Casing: Nicknamed the “shoe” because it resembles one, the conductor casing is the first line of defense for a well.

2015年12月16日 · Each section of formation, after being drilled, has to be sealed off by running a steel pipe called casing. The annular space between the casing and the borehole is filled with cement (Click Here). The casing string is consisted of pipe joints, of approximately 40ft in length with threaded connections.

2014年5月2日 · Functions of conductor casing are as follows; Minimize hole-caving issues. Unconsolidated formations (gravel) will fall into the well resulted in drilling issues. Surface Casing (Structural Casing) In some drilling areas, it may require an additional casing string between conductor casing and surface casing.

2024年8月29日 · Common casing types include surface casing, intermediate casing, and production casing, each serving distinct functions throughout the drilling process. The depth and diameter of the casing tubes are also tailored to the project requirements, ensuring optimal performance and safety.

This article presents the definition of the various casing types: conductor, surface casing, intermediate casing, production casing and liner. This is for offshore drilling operations from jack-up rigs.

Drilling casing is a crucial component in oil and gas extraction, serving as a protective layer for wellbores against collapse and contamination. It’s designed to withstand harsh underground environments and maintain well integrity throughout its lifespan.