!SURFS U R F A C E / I N T E R M E D I A T E C A S I N G D E S I
G Nrev 2.311-1988Well name:Nefertiti-3XCasing depth:7800.0Casing
type:Intermediate IDate:25-Sep-07Casing:13 3/8", 68
ppfEngineer:DTL80, BTCRemarks:I N P U T D A T
ATemp.-gradient1.55F/100'Surface temperature75.00FTop casing
TVD40ftTop casing MD40ftCasing-shoe TVD6,926ftCasing-shoe
MD7,800ftLast csg.-shoe depth TVD1,500ftNext csg.-setting depth
TVD9,700ftPore pressure @ current csg-shoe9.00ppgPore pressure @
last csg-shoe9.00ppgIs next casing a liner, but does not go to
T.D.? (yes = 1, no = 0)1.00Max pore pressure in next interval (or
in interval below linerif next casing is a liner and does not go to
T.D.)10.00ppgNext casing point below liner, TVD (0 if
n/a)12171.00ftFracture gradient @ shoe (or @ next shoe,if next
casing is a liner and does not go to T.D.)15.00ppgCasing OD (in
decimal no.)13.375inCasing ID (in decimal no.)12.415inMin
yield-strength of material80,000psiLesser of int. yield pressure or
leak resistance5,020psiCollapse resistance2,260psiPipe body yield
strength1,556,000lbsJoint strength1,300,000lbsActual weight of
casing68.00lbs/ftMax. dogleg severity1.50/100'@ depth4,000ftMud
weight when TIH csg.10.00ppgWeight of cement-displacing
fluid10.00ppgTop of lead-cement, TVD1,000ftWeight of lead
cement13.20ppgTop of tail cement TVD (=csg. shoe TVD, if
n/a)5,000ftWeight of tail cement (= 0 if n/a)15.80ppgPore pressure
at top of lead-cement (if in open hole,else 0)9.00ppgE N D O F I N
P U T D A T AWell name:Nefertiti-3XCasing depth:7800Casing
type:Intermediate IDate:25-Sep-07Casing:13 3/8", 68
ppfEngineer:DTL80, BTCBURST CALCULATIONS6,926: TVD csg.-shoe,
ftZ-FACTOR CALCULATIONS9,700: TVD of next csg-shoe,ftA
=0.620289732912,171: TVD of casing point below next one, (0 if
n/a)B =0.05271118089.00: Pore pressure @ csg-shoe, ppgC
=0.063989399.00: Pore pressure @ top of cement (if in open hole),
ppgD =0.020727540510.00: Pore pressure @ next csg-shoe or the one
below,ppgE =0.000000001115.00: Fracture gradient @ shoe or next
shoe, ppgF =0.00000154221.55: Temp gradient (F/100')AA
=1.652115688275: Surface temperature, FZ FACTOR=1.0892695135,020:
Internal yield or leak resistance, psi5,044= G79 BHP (psi)225= BHT
( F)7.52= Pred2.00= Tred1.089= Z-FactorFracture @ shoe or next shoe
:Max anticipated pressure @ next shoeor next shoe below:.070: Gas
gradient (psi/ft).070: Gas gradient, psi/ft680: P hyd gas f/ shoe
to surf., psi6,329: Max. pressure @ either shoe, psi7,566: P frac
max @ either shoe, psi5,478: P max @ csg-top, psi7,371: P max @
this shoe psi5,546: P max @ top of cement, psi6,889: P max @
csg-top, psi5,581: P max @ last csg-shoe, psi6,956: P max @ top of
cement, psi853: P hyd gas, psi6,991: P max @ last csg-shoe,
psi5,475: MASP, psi6,886: MASP, psi@ depthBurst-loadBackupEff. bu.
loadActual D.F.ftpsipsipsi@ surface05,47505,4750.92@
csg.top405,478215,4570.92@ top of cmt1,0005,5465205,0261.00@ last
csg-shoe1,5005,5817544,8271.041' bel.last
csg-s1,5015,5817024,8781.03@ csg. shoe6,9266,3293,2413,0881.63The
design factor has to be 1.01,160ft of 8.6 ppg water in the hole
required to give a min D.F. of 1.0 @ top of csg.If ( effective
burst load - internal yield pressure ) < 0,then the required
hydrostatic head of water is 0 ft,else the required hydrostatic
head of 8.6 ppg water is : see numberWell name:Nefertiti-3XCasing
depth:7,800Casing type:Intermediate IDate:25-Sep-07Casing:13 3/8",
68 ppfEngineer:DTL80, BTCTension Calculations40: Csg top, MD,
ft13.38: OD, in6,926: Casing shoe, TVD, ft12.42: ID, in7,800:
Casing shoe, MD, ft1.50: Dogleg sev., /100'10.00: Mud weight,
ppg4,000: @ depth, ft68.00: Actual casing wt, lbs/ft218,919:
Tension in dogl., lbs1,556,000: Pipe body yield str.,lbs1.0306: x
for bend. force calculation1,300,000: Joint strength, lbs0.7741:
tanh (x)String weight in air, lbs527,680considers MD for liners and
TVD for casingsBuoyancy factor.847String weight in mud,
lbs447,057Pipe body design factor3.48Connection design
factor2.91The design factors have to be 1.6Considering axial force
due to bendingConsidering couplings contact only.( x / tanhx )
=1.33Stress concentration factor:Bending force in dogleg,
lbs111,917( Stress is33 %higher thanTotal tension in dogleg,
lbs330,836in continous wall contact calculation. )Design factor
pipe body4.70Design factor pipe joint3.93The design factors have to
be 1.6Well name:Nefertiti-3XCasing depth:7800Casing
type:Intermediate IDate:25-Sep-07Casing:13 3/8", 68
ppfEngineer:DTL80, BTCCOLLAPSE LOAD CALCULATIONS10.00: Mud weight
when TIH csg., ppg40: Top of csg. TVD, ft1,000: Top of cement TVD,
ft40: Top of csg. MD, ft5,926: Length of cement-column,ft6,926:
Csg-shoe TVD, ft10.00: Weight of displacing fluid, ppg7,800:
Csg-shoe MD, ft13.2: Weight of lead cement-slurry, ppg80,000: Min.
yield strength, psi15.80: Weight of tail cement-slurry, ppg2,260:
Collapse resistance, psi1,500: Last casing shoe TVD, ft9.00: Pore
pres. @ csg-shoe, psi9.00: Pore pressure at top of cmt., ppg19.445:
Pipe end area, sqin(if in open hole)COLLAPSE RATING
CALCULATIONEffective load @ top of casing457648lbs csg weight
-Effective load @ shoe of casing-70032lbs (Phydr. * Pipe
area)(Negative load indicates compression)Biaxial load effect
downgrading @ top100% ratio of eff. coll. resistanceBiaxial load
effect upgrading @ shoe100% to nominal coll. resistanceEff.
collapse-resistance @ top of csg.2260psiCollapse Rating
calculations acc. API Bul. 5C3 and BiaxialEff. collapse-resistance
@ csg-shoe2260psi(calculated acc. API Bul 5C3,27.86: D/t23535:
Stress, Sa (psi) @ csg topno down/upgrading, if D/t ratio >
20)80000psi: Yp (min. yield)-3602: Stress, Sa (psi) @ csg
shoe7.2254517659Results acc.@
depthColl.-loadBackupEff.coll.loadCol. ratingDesg.
factororftpsipsipsipsiAPI 5C3BIAXIALTop Casing
TVD40210212,260108.65Sa, psiYpa,
psiABCFG(D/t)yp(D/t)pt(D/t)tePypPpPtPePcPc%errorAQBQCQLast shoe
TVD1,50078007802,2602.900800003.0710.066719551.9980.043413.3822.4731.0255361523226323352263226300.00000019530-1top
of cmt
TVD1,00052005202,2604.3523535655923.0230.059415241.9820.039014.0923.8234.24453916942110233521101855-120.00000019530.0000531414-0.91345233250%
depth
TVD3,4631,80101,8012,2601.26-3602817403.0770.067620072.0010.044013.3122.3330.6856561493227623352276231220.0000001953-0.0000081321-0.9979732896Csg-shoe
TVD6,9263,6021,8011,8012,2601.26mudweight * depthThe design factors
have to be 1.0WHILE CEMENTING THE CASING:@
depthColl.-loadBackupEff. col. loadCol. ratingDesg.
factorftpsipsipsipsiTop casing TVD40212102,260999.00Top lead ct
TVD1,00052052002,260999.00Top tail ct
TVD5,0003,2662,6006662,2603.40Csg-shoe
TVD6,9264,8483,6021,2462,2601.81slurry weight * depthThe design
factors have to be 1.0PRINT PAGE 1 - 4 at 90% page size
