Drilling Calculations.xls

Required casing slips setting load Write only in to the

coluor cells!

Casing nominal weight (Gcas):

68.6 68.6 kg/m kg/m

Wellhead prodacion temperature (to1):

60 C

Wellhead temperature during the job (to2):

25 C

Drilled depth (L1):

2069 m

Expected TOC in annulus (L2):

500 m

Bottomhole Temperature (t1):

94 C 664 t

Casing body yield strength :

F= L2*Gcas+33*DT*Gcas DT= ta -tb T= to + (t1-to)L2/2L1 TOC Free casing in an annulus lus static tic av avarage (L2) temperature (ta) 500 m 550 m 600 m 650 m 700 m 750 m 800 m 850 m 900 m 950 m 1000 m

33.3 C 34.1 C 35.0 C 35.8 C 36.6 C 37.5 C 38.3 C 39.1 C 40.0 C 40.8 C 41.6 C

Free casing prodactio tional av avarage temperature (tb) 64.1 C 64.5 C 64.9 C 65.3 C 65.7 C 66.1 C 66.5 C 66.9 C 67.3 C 67.8 C 68.2 C

Free casing Casing slips avarage te temp. requir uired se settin ting difference (DT) load (F) 30.8 C 30.3 C 29.9 C 29.5 C 29.1 C 28.7 C 28.2 C 27.8 C 27.4 C 27.0 C 26.5 C

The casing slips setting load can NOT be more than 50%-a of the casing body yield strength !!

104 t 106 t 109 t 111 t 114 t 116 t 119 t 121 t 124 t 126 t 129 t

Stucked string free point calculation Write only in to the

coluor cells!

Pipe nominal weight (Ppipe): Strech (L1): Differencitial load (T2-T1):

46.7 kg/m 420 mm 20 t

L= 2,675*Pcső*L1/ (T2-T1) Depth of stuck:

2623 m

Required pull for making up Tubing hanger  Write only in to the

coluor cells!

Pipe nominal weight (Ppipe): Packer depth (Hp): Expansion (L1):

6.7 kg/m 1400 m 1000 mm

L1= Hp*F1/(2,675*Gcső)

Required pull on pipe (F1):

12.8 tonna

Expected Maximum Wellhead Pressure

Pbh=Ps*e

f=

f 

0.076*G*L

G - rel. gas density

Tbh+Ts+547

L - Depth (m) Tbh - Bottomhole temperature ©

e=

2.718281828

Ts - Surface temperature © Pbh - Bottomhole pressure

P form TVD form Required MW

5638 psi 3386 m 1.17058 kg/l

TVD (m) MW (ppg) Mw (kg/l)

Pbh (bar)

Ps - Surface Pressure

388.83 bar  

Tsurf (C) Tgrad.(c/100m) Tbtm(C)

 re. density

f 

e

f 

Pmax.surface(bar) Pmax.surface(ps

1200 1300 1400 1500

9.2 9.2 9.2 9.2

1.10 1.10 1.10 1.10

129.7 140.6 151.4 162.2

30 30 30 30

3 3 3 3

66 69 72 75

0.5544 0.5544 0.5544 0.5544

0.078633 0.084791 0.090891 0.096935

1.081808 1.088489 1.095149 1.101789

119.9 129.1 138.2 147.2

       

1713.4 1844.7 1974.6 2102.9

3386

9.8

1.17

388.8

19

3

120.58

0.5544

0.207794 1.230959

315.9

 

4512.5

i)

Write only in to the Pipe nominal weight (Ppipe): Packer depth (Hp): Density (Q1): Buoyancy: DP weight:

coluor cells! 33.57 kg)m 1900 m 1.08 kg)l 0.8624 55,008 metric tonne 121,269 Klbs

Cuttings weighted fluid density

Write only in to the

coluor cells!

Drilled Hole size: ROP: Cuttings density: Flow rate: Mud density: Depth:

16 " 2 m/hr 2.8 kg/l 3200 l/min 1.16 kg/l 1140.00 m/hr 

Cuttings weighted fluid density:

1.162 Kg/l

Hole cap.; Drilled cuttings: Drilled cuttings:

 

Pressure 130.0 Bar  1884.6 psi

Density of different cuttings Sand: Gypsum Granite: Hard Limestone: Rock Salt:

2.6 2.35 2.4 - 3.0 2.6 2.16

kg/l kg/l kg/l kg/l kg/l

129.7 l/m 4.3 l/min 12.1 kg/min