Casing and liners for drilling and completion : design and by Ted G. Byrom
By Ted G. Byrom
Once regarded as area of interest expertise, operators this day are using extra possibilities with casing and liners as formations and environments develop in hassle, in particular with the radical oil and gasoline increase. Casing and liners for Drilling and Completions, second version offers the engineer and good fashion designer with up to date details on severe houses, mechanics, layout fundamentals and most up-to-date functions for today’s form of good. Renovated and simplified to hide operational issues, strain lots, and choice steps, this guide delivers the data to execute the basic and primary positive factors of casing and liners. Bonus positive aspects include:
- Additional word list further to provide an explanation for oil box terminology
- New appendix on worthy each day formulation comparable to axial rigidity, shear rigidity in tubes and valuable tension components
- Listing component to acronyms, notations, symbols and constants for fast reference
- Concise step by step easy casing layout approach with examples
- Thorough insurance and pointers on very important box perform for install issues
- Advanced equipment for severe and horizontal good casing layout together with hydraulic fracturing
- Exhaustive appendices on foundational subject matters: devices & nomenclature, good mechanics, hydrostatics, borehole setting & rock mechanics, and a precis of worthy formulation
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Extra resources for Casing and liners for drilling and completion : design and application
That notwithstanding, here are two charts that show some typical choices. 7). These charts start with the last string of casing or liner and work downward to the first casing string of the well. You can see on these charts that there are many options even for those situations where the same size liner or casing is to be run. In general, hard rock offers us more choices, and clearance between the casing and borehole wall can be less than for unconsolidated formations. You will note in the chart for unconsolidated rock that there are still some options, but not as many.
That is the size of the next string of casing. • Repeat the procedure until all of the hole sizes and casing sizes have been determined. Many times in actual practice, casing sizes are often determined by what is readily available in some inventory (the company’s, partner’s, or vendor’s) and the delivery times. The cost of leaving surplus pipe in inventory or excessive delivery times often supersede any “optimum design” based strictly on engineering calculations. Precaution: After the casing strings have been designed be sure to check the drift diameters to be certain that all the desired bit sizes can be accommodated.
So, while the third option is not common there are often very good reasons for doing it. And further, there are many wells that require two liners instead of one, and the tieback string is always a preferred option in that case. There are many possibilities. Well conditions and costs dictate the actual choices. We will discuss those choices in more detail later. 1 Alternative approaches and contingencies There are additional approaches to allow for more clearance for the casing. One method is to under ream the open hole below the current casing string.