How do you design a casing string?
Table of Contents
How do you design a casing string?
To design a casing string, one must have knowledge of:
- Purpose of the well.
- Geological cross section.
- Available casing and bit sizes.
- Cementing and drilling practices.
- Rig performance.
- Safety and environmental regulations.
What is casing design?
The design of a casing program involves the selection of setting depths, casing sizes and grades of steel that will allow for the safe drilling, and completion of a well to the desired producing configuration.
What is well cat?
WELLCAT™ software provides precise solutions for both wellbore analysis and integrated casing and tubing design. It calculates accurate downhole temperature and pressure profiles, which can be used for pipe-body movement and casing and tubing load analysis.
What is a casing design factor?
Many factors enter into the production casing design. These include the mud weights required to drill the well and balance the formation pressures, the fracture gradients, casing seat depths, casing sizes, the directional plan, the cement program and the temperature profiles.
What is a casing program?
Sometimes the well is drilled in stages called a casing program. Here, a well is drilled to a certain depth, cased and cemented, and then the well is drilled to a deeper depth, cased and cemented again, and so on. Each time the well is cased, a smaller diameter casing is used.
What are the types of casing?
The five types of casing string are conductor casing, surface casing, intermediate casing, casing liner, and production casing.
What is wildcat drilling?
Wildcat drilling, a form of high-risk exploratory drilling, is the process of drilling for oil or natural gas in unproven or fully exploited areas that either have no concrete historic production records or have been completely exhausted as a site for oil and gas output.
What do Wildcatters do?
A wildcatter is an individual who drills wildcat wells, which are exploration of oil wells drilled in areas not known to be oil fields.
Where is casing commonly used?
Casing that is cemented in place aids the drilling process in several ways: Prevents contamination of fresh water well zones. Prevents unstable upper formations from caving in and sticking the drill string or forming large caverns.
What is casing program?
What is the purpose of casing?
The casing forms a major structural component of the wellbore and serves several important functions: preventing the formation wall from caving into the wellbore. isolating the different formations to prevent the flow or crossflow of formation fluid.
What does a wildcatter do?
A wildcatter is an American term for a person who drills wildcat wells, which are exploration wells drilled in areas not known to be producing fields.
What is a wildcatter product?
In the oil industry, a wildcatter is an oil prospector who drills wildcat wells. These wells are drilled in areas not near other oil fields, and areas that are not known oil producers. The reason for drilling such a well is the hope of discovering a new source of oil to be extracted from the earth.
What is casing engineering?
Casing is a large diameter pipe that is assembled and inserted into a recently drilled section of a borehole. Similar to the bones of a spine protecting the spinal cord, casing is set inside the drilled borehole to protect and support the wellstream.
What is a blind ram?
1. n. [Drilling] A thick, heavy steel component of a conventional ram blowout preventer. In a normal pipe ram, the two blocks of steel that meet in the center of the wellbore to seal the well have a hole (one-half of the hole on each piece) through which the pipe fits.
What is a wildcat miner?
The wildcat miners who work in the small-scale gold mining camps of the Brazilian Amazon are known as garimpeiros. Across the centuries, garimpeiros have scoured the most remote reaches of the Amazon rainforest in search of gold.
What is blind RAM used for?
The primary function of the blind ram BOPs is to cut off the openings for tubing or drill strings when there’s no production going on in the well. The Dual Shearing Blind Ram (DS) is a special type of ram BOP.
