Case Analysis : Float Equipment

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Float equipment are a fundamental aspect of cementing operations, which serves as a foundation for casing equipment. They are commonly used in the lower section of the casing and help reduce the stress applied to the derrick by allowing the casing to be floated into place. According to Weatherford oil and gas service company, “they guide the casing to total depth, prevent contaminated mud from entering the casing, provide a landing point for casing wiper plugs, reinforce the lower end of the casing string, and ensure greater accuracy of cement slurry displacement”. Floating equipment is typically made up of 2 or 3 important tools, which include a float collar and float shoe or guide shoe. This paper will focus on the mechanisms and…show more content…
Additional functions of cementing include but are not limited to preventing blowouts, sealing of zones of lost circulation, and protecting the casing from corrosion. Drilling in the United States of America dates as far back as 1859, when the Drake well was first drilled in Pennsylvania. At the time one of the most common problems well operators encountered, was their inability to produce oil independently of water. Since there was no casing/casing design, this problem became more prevalent. The water usually came from the same formation bearing the oil, but more commonly it came from an upper sand formation. The implementation of cementing and proper casing design did not start until 1903, when the first cement slurry was used to “shut off downhole water just above an oil sand in the Lompoc fields in California”(Doherty 1,1960) by mixing and dumping 50 sacks of fine Portland cement by means of the bailer method. After a 28-day waiting period, the cement was then drilled out. It was introduced by Frank .F Hill of Union Company. In 1910, the dump bailer and tubing method was replaced by the two-plug cementing method also known as the Perkins method, which was introduced in California by Almond .A Perkins, and it quickly became the foundation for modern oil well cementing. The cement plugs, were made out of
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