8/13/2019 Desain Casing

1/5

0 0 02000 1339 12173000 2231 2028

0 11301200 1130 28503000 2850

Diameter casing (OD) 13.375 incPanjang Casing (Ls) 3000 ftPanjang min. tiap seksi 1000 ftGrad. Tek. Rekah @ kaki casing (G fr) 14 ppgSemen Density Ls1 0-2000 ft ( r s1 ) 11.7 ppg

Ls2 2000-3000 ft ( r s2 ) 15.6 ppgMin. drift diameter 12.25 incdensitas lumpur saat cas. dipasang 11 ppgDesign factor burst/collapse 1.1

tension 1.6

A. Beban Burst B Pfr A C1. Garis Beban Burst 0 0 0 1995 1995Kaki Casing 3000 1395 24024 2340 945IP = 0,052.(Gfr + SF).Ls

2340 psiPermukaanPs = IP - 0,115Ls

1995

Pe = 0,465*Ls1395

2. Garis Outside Backup Pres.

Pe = 0,465*Ls1395

3. Garis Resultankaki casing = IP - Pe

945 permukaan = Ps 1995

4. Garis DesainKaki Casing = 1039.5Permukaan = 2194.5

0

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D e p

t h ,

f t

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D e p

t h ,

f t

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8/13/2019 Desain Casing

2/5

casing yang dipilih sementara dari tabelseleksi -1 (L s1 ) 1200 -3000 ft

S80; 68 lb/ft; STCBurst Rating = 3450 psi

seleksi -2 (L s2 ) 0 -1200 ftK55; 54,5 lb/ft; STCBurst Rating = 2730 psi

B. Beban Collapse1. Kolom SemenSemen pada 0 - 2000 ftP e1 = 0,052 r s1 Ls1

1216.8 psi

P e2 = (0,052 r s2 Ls2 ) + P e12028 psi

2. Garis Desain

C. Beban Tension

BBF = 0.8321 B+100000 B*1,6 3000 0WM1 = L1 x W a1 x BF 1200 101844.3

101844.3 lbs 201844.3 lbs 162950.8 lbs 0 156261.1

WM2 = L2 x W a2 x BF

156261.1 lbs 256261.1 lbs 250017.7 lbs

Titik Netral,TN =

1199.99 ft

keteranganJoint strength casing seksi -1 = 952000 lbs > 162950,8 lbs

5.651 mBF

r

11

1 DWM

BF DTN

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8/13/2019 Desain Casing

3/5

Joint strength casing seksi -2 = 547000 lbs > 250017,7 lbs

jadi, rangkaian tahan terhadap tension dan pengujian dapat dilakukan terhadap beban biaksial

C. Beban Biaxial

seksi -1 Beban Tension 101844.3Body Yield Strength 1556000 X = 0.065

X Y0.065 0.981

0.065453 0.9810.07 0.98

Collapse Rating koreksi =

0,981 x 2260 = 2217.06 psi

s ek si -2 d i das arBeban Tension 101844.3Body Yield Strength 853000 X = 0.119

X Y0.01 0.997

0.0119 0.997613 0.99660.015 0.996

Collapse Rating koreksi =0,9966 x 1130 = 1126.158 psi

di puncak Beban Tension 156261.1Body Yield Strength 853000 X = 0.183Y = 0.937

Collapse Rating koreksi =0,937 x 1130 = 1058.81 psi

8/13/2019 Desain Casing

4/5

D2194.51039.5

1339

2231

1217

2028

500 1000 1500 2000 2500 3000

Tekanan, psi

Collapse @ Surface Casing

"Garis Desain"

"Semen"

"Casing 2"

"Casing 1"

500 1000 1500 2000 2500

Tekanan, psi

Burst @ Surf. Casing

"B"

"Garis Beban Burst"

"Resultan"

"ResultanxGfr"

50000 100000 150000 200000 250000 300000

Tekanan, psi

Tension @ Surf. Casing

8/13/2019 Desain Casing

5/5

B+100000 B*1,60 0

201844.3 162950.8256261.1 250017.7

101844

156261

201844

256261

162951

250018

"B" "B+105" "Bx1,6"