Casing accessories in the oil and gas industry are tools used to facilitate the installation and performance of casing strings, which are pipes installed in a wellbore to provide structural support, prevent borehole collapse, and isolate zones.
These accessories are crucial for ensuring the integrity and efficiency of the wellbore.
Common types of casing accessories include:
Centralizers: Ensure the casing is centered within the wellbore, vital for proper cementing and preventing casing damage.
Casing Scrapers: Clean the inside of the casing before cementing, removing debris that could hinder the cement bond.
Float Equipment (Shoes & Collars): One-way valves that prevent backflow of cement and allow casing to float during cementing for controlled operations.
Cementing Plugs: Separate cement from other fluids and clean casing walls.
Casing Hangers: Provide support for the casing string, ensuring safe and controlled drilling.
Stop Collars: Secure centralizers in place along the casing string.
Scratchers: Remove drilling mud and debris from the wellbore.
Blast Joints: Protect control lines from erosion and impacts.
Stab-in Float Collars & Shoes: Enable direct stabbing of the drill pipe into float equipment during cementing.