5 ft pipe 28 casing design at some depth the 435 ft

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: n more economical string would include some 43.5 #/ft pipe? 28 Casing Design At some depth the 43.5 #/ft pipe would be able to handle the collapse requirements, but we have already determined that it will not meet burst requirements. ∴ NO! 29 Burst? N-80 43.5 #/ft? N-80 47.0 #/ft N-80 53.5 #/ft Depth = 5,057? 5,066? 5,210? Depth = 6,369 6,369 6,382 6,509 8,000 30 N-80 53.5 #/ft? Tension? N-80 47.0 #/ft N-80 53.5 #/ft Depth = 6,369 6,369 6,382 6,509 8,000 31 Tension Check The weight on the top joint of casing would be (6,369 ft * 47.0# / ft ) + (1,631 ft * 53.5# / ft ) = 386,602 lbs actual weight With a design factor of 1.8 for tension, a pipe strength of 1.8 * 386,602 = 695,080 lbf is required 32 Tension Check The Halliburton cementing tables give a yield strength of 1,086,000 lbf for the pipe body and a joint strength of 905,000 lbf for LT & C. ∴ 47.0 # / ft is OK to surface 33 Casing Design Review We have 4 different weights of casing available to us in this case: 1. Two of the four weights are unacceptable to us everywhere in the string because they...
View Full Document

This note was uploaded on 12/03/2012 for the course PMRE PMRE6004 taught by Professor M.tamim during the Summer '12 term at Bangladesh University of Eng and Tech.

Ask a homework question - tutors are online