MAXIMUM ALLOWABLE OVERPULL WORKSHEET INPUT VALUES IN RED.
DATA
TRAVELLING BLOCK / KELLY OR T.D.S. WEIGHT = 25,000 LBS DRILL STRING WEIGHT = 224,901 LBS
DEPTH (MD) MUD WEIGHT BOUYANCY FACTOR
16027 feet 4,886 m 12.10 ppg 0.82
MAX O/PULL AT "A" CROWN WEIGHT
0 LBS 25,000 LBS
MAX O/PULL AT "B" CROWN WEIGHT
239,895 LBS 489,796 LBS
MAX O/PULL AT "C" CROWN WEIGHT
0 LBS LBS
A 3.5" S-135
PPF feet 0m
PREMIUM GRADE MINIMUM YIELD: 100 % 80 %
0 joints
0 LBS 0
LBS LBS
B 3.5" S-135 PREMIUM GRADE MINIMUM YIELD: 100 % 80 %
15.50 PPF 15065 feet 4592.99 m 190,389 LBS
485.97 joints
0 feet 0m 0 LBS
0 joints
962 feet 293.29 m 34,512 LBS
32.07 joints
580,995 LBS 464,796 LBS
C H.W. D.P. PREMIUM GRADE MINIMUM YIELD: 100 % 80 %
4.75" DC
0.00 PPF
0 0
LBS LBS
44 PPF
TD =
16027 feet 4,886 m
COMMENTS: 1. Minimum yield data obtained from API RP 7G. 2. Maximum allowable overpull is determined by using 80% of the Premium rated Tensile Yield
OPULL.XLS
04/02/2011
MAXIMUM ALLOWABLE OVERPULL WORKSHEET INPUT VALUES IN RED.
TRAVELLING BLOCK / KELLY OR T.D.S. WEIGHT = 25,000 LBS DRILL STRING WEIGHT = 72,302 LBS
Data DEPTH (MD) MUD WEIGHT BOUYANCY FACTOR
1,080 feet 329 m 9.50 ppg 0.85
MAX O/PULL AT "A" CROWN WEIGHT
497,354 LBS 594,656 LBS
MAX O/PULL AT "B" CROWN WEIGHT
426,148 LBS 523,450 LBS
MAX O/PULL AT "C" CROWN WEIGHT
376,309 LBS 473,611 LBS
A 5" S135
19.50 PPF 0 feet 0m
PREMIUM GRADE MINIMUM YIELD: 100 % 80 %
0 joints
0 LBS 712,070 LBS 569,656 LBS
B 5" G1O5 PREMIUM GRADE MINIMUM YIELD: 100 % 90 %
19.50 PPF 0 feet 0m 0 LBS
0 joints
450 feet 137.2 m 80.76 18,970 LBS
14.52 joints
630 feet 192.07 m 53,332 LBS
21 joints
553,833 LBS 498,450 LBS
C 5" H.W. D.P. PREMIUM GRADE MINIMUM YIELD: 100 % 80 %
6½" DRILL COLLARS
49.30 PPF
560,764 LBS 448,611 LBS
99 PPF
TD =
1080 feet 329 m
COMMENTS: 1. Minimum yield data obtained from API RP 7G. 2. Maximum allowable overpull is determined by using 80% of the Premium rated Tensile Yield
OPULL.XLS
04/02/2011
FREE POINT
PIPE STRETCH FOR FREE POINT CALCULATION INPUTS IN RED. LENGTH OF FREE PIPE ( ft ) = L STRETCH OF FREE PIPE ( inches ) = S CROSS SECTIONAL AREA OF PIPE ( inches2 ) = A YOUNGS MODULUS OF ELASTICITY = E FORCE TO CREATE STRETCH ( LBS ) = F
L = (( E / F )*S*A ) / 12 E= 3.00E+07 F= 60,000 LBS S= 48 Inches O.D. DP = 4.50 Inches I.D. DP = 3.83 Inches A= 4.41 Inches2
L=
8,814.90 Feet OR 2,686.65 Metres
54954909.xls
FREE POINT
54954909.xls
