What is OCTG coupling?
OCTG – Coupling for Casing & Tubing Couplings are short lengths of pipe used to connect 2 joints of tubing or casing. They come with painted colour codes on their external surface to indicate their grades. Couplings are manufactured according to API 5CT and 5B specifications.
What is oil country tubular goods?
Oil Country Tubular Goods (OCTG) refers to the casing, tubing, piping and pipelines used in the petroleum industry. These tubular products are the foundation of oil and gas well design and pipeline design and provide the conduit for the safe and efficient transport of oil and gas products to market.
What is tubular drilling?
1. n. [Drilling] A generic term pertaining to any type of oilfield pipe, such as drill pipe, drill collars, pup joints, casing, production tubing and pipeline.
What is a wellhead in oil and gas?
Simply put, a wellhead is a system of spools, valves, and assorted adapters that used to provide pressure control of a production well. Its primary purpose is to provide a suspension point and pressure seals for the casing strings that run from the bottom of the hole sections to the surface pressure control equipment.
What is difference between casing and tubing?
Tubing naturally has a smaller diameter than casing, except for the 4 1/2-inch diameter. An outer diameter of 114.3 mm (4 1/2 inches) is considered a threshold and can be either casing or tubing. Anything smaller is called tubing, anything larger is casing.
How do well heads work?
How does a well cap work?
The watertight well cap covers and encloses the top of your well casing, while the top of the cap can be removed to service the well. The well cap protects the exposed portion of the well casing, forms a protective cover from the elements and bars the entry of vermin or contaminants.
Why is casing needed?
Casing is a series of steel pipes that are run into a drilled oil well to stabilize the well, keep contaminants and water out of the oil stream, and prevent oil from leaching into the groundwater. Casing is installed in layers, in sections of decreasing diameter that are joined together to form casing strings.
What is BTC in casing?
BTC (Buttress threading) This thread is designed to improve axial tensile or axial compressive load capacity and to provide leakage resistance. LTC, STC and BTC are the same in appearance, how to distinguish them that depends the outside diameter and application.
What is BTC pipe?
Baku-Tbilisi Ceyhan (BTC) pipeline carries oil from the Azeri-Chirag-Deepwater Gunashli (ACG) field and condensate from Shah Deniz across Azerbaijan, Georgia and Turkey. It links Sangachal terminal on the shores of the Caspian Sea to Ceyhan marine terminal on the Turkish Mediterranean coast.