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Difference between revisions of "AFE: tubulars"

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Casing and tubing costs are significant factors in the well cost that must be properly estimated in the [[Authority for expenditures (AFE)|authority for expenditure]] (AFE). In some cases, they may account for 50 to 60% of the total expenditures. The costs are dependent on well depth, size, grade requirements, and couplings.  
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Casing and tubing costs are significant factors in the well cost that must be properly estimated in the [[Authority for expenditures (AFE)|authority for expenditure]] (AFE). In some cases, they may account for 50 to 60% of the total expenditures. The costs are dependent on well depth, size, grade requirements, and couplings. <math>{\partial^2\over\partial x_1\partial x_2}y</math>
  
 
==Pipe costs==
 
==Pipe costs==
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Pipe costs are influenced heavily by several factors. Pipe size is a major consideration. '''Fig. 1''' illustrates cost variations according to pipe size for N-80 grade long-thread and coupling (LTC) pipe that exceeds a burst rating of 5,000 psi in several sizes. Although engineering considerations should have the major impact on the pipe size selection, cost considerations should have some influence.  
 
Pipe costs are influenced heavily by several factors. Pipe size is a major consideration. '''Fig. 1''' illustrates cost variations according to pipe size for N-80 grade long-thread and coupling (LTC) pipe that exceeds a burst rating of 5,000 psi in several sizes. Although engineering considerations should have the major impact on the pipe size selection, cost considerations should have some influence.  
  
<gallery widths=300px heights=200px>
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<gallery widths="300px" heights="200px">
 
File:Devol2 1102final Page 515 Image 0001.png|'''Fig. 1—Pipe size vs. cost.'''
 
File:Devol2 1102final Page 515 Image 0001.png|'''Fig. 1—Pipe size vs. cost.'''
 
</gallery>
 
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Costs increase with higher pipe grades. '''Table 1''' shows costs for 40.0-lbm/ft., 9.625-in. pipe with LTC couplings. As in the case of the pipe sizes, however, pipe-grade selection is an engineering decision. Couplings are seldom selected as a result of costs. However, higher-price premium couplings may allow the use of smaller pipe sizes, which will reduce the overall well costs ('''Table 2''').  
 
Costs increase with higher pipe grades. '''Table 1''' shows costs for 40.0-lbm/ft., 9.625-in. pipe with LTC couplings. As in the case of the pipe sizes, however, pipe-grade selection is an engineering decision. Couplings are seldom selected as a result of costs. However, higher-price premium couplings may allow the use of smaller pipe sizes, which will reduce the overall well costs ('''Table 2''').  
  
<gallery widths=300px heights=200px>
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<gallery widths="300px" heights="200px">
 
File:Devol2 1102final Page 515 Image 0002.png|'''Table 1-Casing Cost Comparisons By Pipe Grade*'''
 
File:Devol2 1102final Page 515 Image 0002.png|'''Table 1-Casing Cost Comparisons By Pipe Grade*'''
 
File:Devol2 1102final Page 516 Image 0001.png|'''Table 2-Coupling Cost Comparison*'''
 
File:Devol2 1102final Page 516 Image 0001.png|'''Table 2-Coupling Cost Comparison*'''
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Casing (or cementing) accessory equipment is used to accomplish an effective primary cement job. Although the equipment does not have a major impact on well costs, it should be considered. '''Table 3''' shows a typical suite of equipment requirements for running and cementing casing. This equipment would cost approximately U.S. $3,500 for a 7⅝-in. casing string and U.S. $25,000 for a 7⅝-in. liner.  
 
Casing (or cementing) accessory equipment is used to accomplish an effective primary cement job. Although the equipment does not have a major impact on well costs, it should be considered. '''Table 3''' shows a typical suite of equipment requirements for running and cementing casing. This equipment would cost approximately U.S. $3,500 for a 7⅝-in. casing string and U.S. $25,000 for a 7⅝-in. liner.  
  
<gallery widths=300px heights=200px>
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<gallery widths="300px" heights="200px">
 
File:Devol2 1102final Page 516 Image 0002.png|'''Table 3-Equipment Requirements For Running And Cementing Casing'''
 
File:Devol2 1102final Page 516 Image 0002.png|'''Table 3-Equipment Requirements For Running And Cementing Casing'''
 
</gallery>
 
</gallery>
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Drive-pipe costs must be calculated for wells that utilize the pipe. The charges vary for pipe sizes and wall thickness. A drive-shoe cost must be included. Typical drive-pipe size and costs are given in '''Table 4'''.
 
Drive-pipe costs must be calculated for wells that utilize the pipe. The charges vary for pipe sizes and wall thickness. A drive-shoe cost must be included. Typical drive-pipe size and costs are given in '''Table 4'''.
  
<gallery widths=300px heights=200px>
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<gallery widths="300px" heights="200px">
 
File:Devol2 1102final Page 516 Image 0003.png|'''Table 4-Typical Drive-Pipe Size And Costs'''
 
File:Devol2 1102final Page 516 Image 0003.png|'''Table 4-Typical Drive-Pipe Size And Costs'''
 
</gallery>
 
</gallery>
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== External links ==  
 
== External links ==  
[[Category:1.1.2 Authority for expenditures (AFE)]] [[Category:NR]]
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[[Category:1.1.2 Authority for expenditures (AFE)]]  
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[[Category:NR]]

Revision as of 12:42, 22 August 2019

Casing and tubing costs are significant factors in the well cost that must be properly estimated in the authority for expenditure (AFE). In some cases, they may account for 50 to 60% of the total expenditures. The costs are dependent on well depth, size, grade requirements, and couplings.

Pipe costs

Pipe costs are influenced heavily by several factors. Pipe size is a major consideration. Fig. 1 illustrates cost variations according to pipe size for N-80 grade long-thread and coupling (LTC) pipe that exceeds a burst rating of 5,000 psi in several sizes. Although engineering considerations should have the major impact on the pipe size selection, cost considerations should have some influence.

Costs increase with higher pipe grades. Table 1 shows costs for 40.0-lbm/ft., 9.625-in. pipe with LTC couplings. As in the case of the pipe sizes, however, pipe-grade selection is an engineering decision. Couplings are seldom selected as a result of costs. However, higher-price premium couplings may allow the use of smaller pipe sizes, which will reduce the overall well costs (Table 2).

Casing equipment

Casing (or cementing) accessory equipment is used to accomplish an effective primary cement job. Although the equipment does not have a major impact on well costs, it should be considered. Table 3 shows a typical suite of equipment requirements for running and cementing casing. This equipment would cost approximately U.S. $3,500 for a 7⅝-in. casing string and U.S. $25,000 for a 7⅝-in. liner.

Drive pipe cost

Drive-pipe costs must be calculated for wells that utilize the pipe. The charges vary for pipe sizes and wall thickness. A drive-shoe cost must be included. Typical drive-pipe size and costs are given in Table 4.

References

See also

Authority for expenditures (AFE)

AFE: location preparation

AFE: drilling rig and tools

AFE: drilling fluids

AFE: rental equipment

AFE: cementing

AFE: support services

AFE: transportation

AFE: supervision and administration

AFE: projected drilling time

AFE: wellhead equipment

AFE: completion equipment

PEH:Introduction to Well Planning

Noteworthy papers in OnePetro

External links