The casing pipe is mandatory in drilling operations as it has a lot of casing functions to prevent cave-in of unconsolidated formations, isolate problem zones, and many more. As mentioned before in our casing design guide, the selection of casing depends on many factors. Here in this article, we shall learn everything about the best …
Have you ever wondered what keeps the pipes and other oilfield equipment threads tightly sealed? The answer lies in a small but essential product known as thread compound. Thread compounds are used in casing, tubing, line-pipe, or drill string on every threaded connection. For the purposes of this topic, we will deal only with the …
Bow-spring casing centralizers are also available in multiple styles, including flexible and rigid, welded and nonweld, single piece, and other. Conventional Bow-Spring Centralizers Conventional bow-spring centralizers are the most common type of centralizers (Fig. 1). Also referred to as imperial bow, this centralizer type offers curved flexible bows that can expand or compress according to …
First of all this VAM TOP is one of Vallouric Company products, and we are not an agent to them or selling any of their product. VAM TOP is a threaded and coupled (T&C) connection for tubing and casing string types. It provides gas-tight sealing under the most severe conditions: VAM TOP thread minimizes the …
To determine the strength of various casing materials, API has designated defined grades. This grading system consists of a letter and number as P-110, L-80. The number is an arbitrary one (e.g. K-55) representing the min yield strength of the casing (Casing performance Properties), the number is an arbitrary one (e.g. N-80). There are also …
In API Buttress Connection Data sheet shows that the casing is externally threaded on both ends of non-upset pipe. The single lengths are joined by an internally threaded coupling. – The thread profile has flat crests and roots parallel to the taper cone with angles 3° and 10° to the vertical of the pipe axis; …
Casing Tallies Versus Liner Tallies There are two different types of tubular tallies: 1) a casing tally spreadsheet and 2) a casing liner tally. A casing tally works from a fixed point at the wellhead (e.g. hanger landing point) and the formulae in the spreadsheet calculate the shoe depth by adding the length of each …
Drilling with Any of the casing types & casing liners is not new. It was routine practice in some shallow fields between 50 and 60 years ago to attach a drilling bit to a small-diameter production string, drill a few hundred feet, and leave it on the bottom once total depth was reached. Outside that …
This is one of the types of casing with connections that can be run through the conventional casing (or other expandable casing) and then expanded to a larger diameter than a conventional casing run through that same size pipe. While this is a relatively new technology, it has seen some good success in numerous applications. …
This stage of the Cementing in drilling process comprises the slurry preparation and pumping equipment at the surface and the down-hole hardware. A vast array of equipment and tools are available from specialized manufacturers and Service Companies and a brief description of the various items, to explain their purpose and function in the cementing processes …