2012-02-28_REVISION - M1980244 ‎(70)‎

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 2/28/2012
• Doc Name: VOL 5, Appendix C: Design Calculations
• From: CC&V
• To: DRMS
• Type & Sequence: AM10
• Email Name: TC1
• Media Type: D
• Archive: No

PROJECT:
Squaw Gulch VLF
FEATURE:
Riser Pipe Design
DETAILS:
Shear Pins
JOB NO:
11256
BY:
OV
CHKD BY:
DTW
SHEET T OF_i
DATE:
08/03/2010
DATE:
08/03/2010
Size and spec. shear pins for compression joint in riser.
For simplicity use carbon steel bolts.
Size bolts to support weight of riser steel casing + 25% for handling (dynamic) lands
Compression joint is located 15 feet below the top of the riser.
From Roscoe -Moss -* Compression Joint Section:
(4) Shear Pins
(4) Shear Pins
Weight at compression joint:
93 ft * 94.62 lbs/ft = 8,799.6.lbs
Shear pin design load:
1.25 * 8,799.6 lbs : 11,000 lbs
Each shear pin carries:
11,000 lbs / 4 = 2,750 lbs
t = shear stress = (4 *F) / (n *d
T = (4 * 2,750 Ibs) / (Ted)
Size for SAE J429 Grade I Bolts / Studs
Yield Strength = 36,000 psi
36,000 psi = (4 * 2,750 lbs) / (n *d
d = 0.312"
24" 0.D. x 0.375" W
25 1/8" 0.1). x 0.5" W RING
26" O.D. x 0.375" W
Each compression joint will have (2) sets of (4) shear pins,
but design for each set to support pipe weight. (e.g. 4
bolts not 8 hold the pipe weight.)
From Roscoe -Moss Table:
24" at.. x 23 1/4" I.D. pipe = 94.62 lbs/ft