well control formulas drillingformula

7/23/2019 Well Control Formulas Drillingformula

1/101

Pump

FIT/LOT

Weight Up

Surge and Swab

Pump out (both duplex and triplex pump)

Pump Pressure and Pump Stroke Relationship

Formation Integrity Test (FIT)

Leak Of Test (LOT)

Inrease mud !eight by adding "arite

Inrease mud !eight by adding #alium #arbonate

Inrease mud !eight by adding $ematite

EquivalentCirculating

en!it"

%&ui'alent #irulating ensity (%#)%&ui'alent #irulating ensity (%#) sing *ield Point +or ,- less than or e&ual to ./ ppg

%&ui'alent #irulating ensity (%#) sing *ield Point +or ,- more than ./ ppg

#alulate %&ui'alent #irulating ensity !ith %ngineering Formula

Surge and S!ab Pressure ,ethod0.

Surge and S!ab Pressure ,ethod01

Well C#ntr#lF#rmula!

2umulator apaity

2tual gas migration rate in a shut in !ell

2d3usted maximum allo!able shut4in asing pressure +or ne! mud !eight

#alulate In5ux $eight

%stimate gas migration rate !ith an empirial e&uation

%stimate type o+ in5ux

Final #irulating Pressure (F#P)

Formation pressure +rom kik analysis

$ydrostati Pressure Loss ue to 6as #ut ,udInitial #irulating Pressure (I#P)

7ik Tolerane (Sur+ae Stak and 8ertial -ell)

7ik tolerane +ator (7TF)

7ill -eight ,ud (7-,)

,aximum +ormation pressure (FP)

,aximum in5ux height

,aximum Initial Shut4In #asing Pressure (,ISI#P)

,aximum pit gain +rom gas kik in !ater based mud


2/101

$i!er %argin

2ir 6ap 9: +t Input #ells

-ater epth .;9:: +t #alulated #ell

,ud -eight =9: ppg

epth (T8) /;::: +t Re+

Riser ,argin .=1? ppg

&ac' t# the (r!t page

http://www.drillingformulas.com/riser-margin
http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/riser-margin-one-of-important-concepts-for-deep-water-drilling/http://www.drillingformulas.com/riser-margin-one-of-important-concepts-for-deep-water-drilling/http://var/www/apps/conversion/tmp/scratch_5/


3/101

-one-of-important-concepts-for-deep-water-drilling/
http://www.drillingformulas.com/riser-margin-one-of-important-concepts-for-deep-water-drilling/http://www.drillingformulas.com/riser-margin-one-of-important-concepts-for-deep-water-drilling/


4/101

)ew Pump Pre!!ure With )ew Str#'e! *p!i+

#urrent Pressure .;9:: psi Input #ells

SP, . @: strks= #alulated #ell

SP, 1 ..: strks=

Ae! Pump Pressure 3,951 psi

http://var/www/apps/conversion/tmp/scratch_5/http://var/www/apps/conversion/tmp/scratch_5/


5/101

)ew Pre!!ure L#!! With )ew %ud *p!i+

Original Pressure Loss .;B:: psi Input #ells

,ud -eight0. ..=?: ppg #alulated #ell

,ud -eight01 .1=?: ppg

Ae! Pressure Loss ,-. psi



6/101

Initial Circulating Pre!!ure *p!i+

Input #ells

S#R Pressure B?: psi #alulated #ell

7ill ,ud -eight .1=:: ppg

Original ,ud -eight .:=:: ppg

F#P 540 psi

&ac' t# the (r!t pa


7/101

e


8/101

Initial Circulating Pre!!ure *p!i+

Input Cells

S#R Pressure B:: psi Calculated Cell

SIPP ?:: psi

I#P 900 psi

Back to the first page


9/101

Kick Tolerance (Surface Stack and Vertical ell!

Previous Casing Shoe MD/TD !"!## ft

TD depth MD/TD $"!## ft

Predicted %ormation Pressure & TD '(.# ppg

Pore pressure uncertaint) #.! ppg

Planned M* & TD '(.# ppg

+as gradient #.'' psi/ft,ea ff Test at casing shoe '.0 ppg

1ole si2e '(.3 inch

Drill pipe si2e !.# inch

4verage 514 si2e 6.! inch

514 length 7!#.# ft

4nnular capacit) 8etween hole and 514 #.'#0 88l/ft

4nnular capacit) 8etween hole and DP #.'('! 88l/ft

Ma9imum anticipated pressure '(.! ppg

Ma9imum allowa8le shut in casing pressur 00(.( psi

ic intensit) #.!# ppg

;nder8alance (0 psi

ic 1eight '"#('.0$ ft

'st case: +as at the 8ottom '#$.7$ 88l

(nd case: +as at the shoe 7.!( 88l

Kick Telerance "4#5$ %%l


10/101

Input Cells

Calculated Cell

&eference


'o ou )ant to ha*e a good oilfield resu+e -lick .ere ///

http)))#drillingfor+ulas#co+kick2tolerance2concept2and2calculation2for2)ell2des
http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/kick-tolerance-concept-and-calculation-for-well-design/http://www.drillingformulas.com/kick-tolerance-concept-and-calculation-for-well-design/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


11/101

ign
http://www.drillingformulas.com/kick-tolerance-concept-and-calculation-for-well-design/http://www.drillingformulas.com/kick-tolerance-concept-and-calculation-for-well-design/


12/101

ui*alent -irculating 'ensit (-'! sing 6ield 7oint for 8 +ore than 13 ppg

Mud weight '3.! ppg Input Cells

P '# CP

?=uivalent Circulating Densit) @?CDA '.( ppg


'o ou )ant to ha*e a
http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


13/101

s.com/e=uivalent-circulating-densit)-ecd-using-)ield-point-for-mw-more-than-'3-ppg/

good oilfield resu+e -lick .ere ///
http://bit.ly/HExXfIhttp://bit.ly/HExXfI


14/101

ui*alent -irculating 'ensit (-'! sing 6ield 7oint for 8 less than 13 ppg

Mud weight $.( ppg Input Cells


15/101

s.com/e=uivalent-circulating-densit)-ecd-using-)ield-point-for-mw-less-than-'3-ppg/

good oilfield resu+e -lick .ere ///
http://www.drillingformulas.com/equivalent-circulating-density-ecd-using-yield-point-for-mw-less-than-13-ppg/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/equivalent-circulating-density-ecd-using-yield-point-for-mw-less-than-13-ppg/


16/101

7ressure 'rop cross a Bit

%low rate 7## gpm

Mud *eight $ ppg

#.30(7

Pressure Drop 4cross a 5it 36 psi

Total %low 4rea in(


17/101

Input Cells

Calculated Cell

&eference


http://www.drillingformulas.com/pressure-drop-across-a-8it/

http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/pressure-drop-across-a-bit/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/pressure-drop-across-a-bit/http://var/www/apps/conversion/tmp/scratch_5/


18/101

Surge and swa8 pressure methodB(

C/:: 7!

C9:: '3#

1ole diameter $.### inch

Drillpipe diameter ! inch

Drill collar diameter 6.(! inch

4verage pipe running or pulling speed (!# ft/min

Drill Pipe ,ength '(### ft

Drill collar length 7## ft

Current Mud *eight '(.! ppg

*ell TD $### ft

P !

n #.6'3

'.763

%luid elocit) @Closed ?nded PipeA around drill pipe ((.' ft/min

Ma9imum pipe velocit) around drill pipe 336.( ft/min

Shear rate of mud around drill pipe @>mA (#'.0

Shear stress of mud around drill pipe @TA 7.'

%luid elocit) @Closed ?nded PipeA around drill collar 3!. ft/min

Ma9imum pipe velocit) around drill collar !'7.# ft/min

?=uivalent flow rate around drill collar 776.7 gpm

7ressure lose around drill pipe 4"0#5 psi

7ressure loss around drill collar :1#" psi

Total 7ressure ;oss 55$#$ psi


19/101

Input Cells

Calculated Cell

&eference

e%site


http)))#drillingfor+ulas#co+deter+ine2surge2and2s)a%2pressure2+ethod2$

http://www.drillingformulas.com/

http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/determine-surge-and-swab-pressure-method-2/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/determine-surge-and-swab-pressure-method-2/http://var/www/apps/conversion/tmp/scratch_5/


20/101

Surge and swa8 pressure methodB'

C/:: 0

C9:: 7#

1ole diameter 6.3! inch

Drill Collar ! inch

ID of drill collar (.(! inchDrillpipe diameter inch

ID of drill pipe 3.3 inch

4verage pipe running or pulling speed (# ft/min

Drill Pipe ,ength '((0# ft

Drill Collar ,ength '## ft

Current Mud *eight '3.( ppg

*ell TD $$0( ft

Select -riteria 222= pen ?nded Pipe

n #.060

#.3$

%luid volocit) around drill pipe @pen ended pipeA ''.0 ft/min

Ma9imum pipe velocit) around drill pipe '0.6 ft/min

7ressure ;oss around drill pipe


21/101

Input Cells

Calculated Cell

&eference

e%site


http)))#drillingfor+ulas#co+surge2and2s)a%2calculation2+ethod21


http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/surge-and-swab-calculation-method-1/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/surge-and-swab-calculation-method-1/http://var/www/apps/conversion/tmp/scratch_5/


22/101

8a>i+u+ pit gain fro+ gas kick in )ater %ased +ud

36(# psi

Pit volume gain (# 88l

'.! ppg

#.'('! 88l/ft

8a>i+u+ pit gain $7.! 88l

?9pected formation pressure

ill *eight Mud

4nnular Capacit)


23/101

Input Cells

Calculated Cell

&eference

e%site


http)))#drillingfor+ulas#co++a>i+u+2pit2gain2fro+2gas2kick2in2)ater2%ased2+ud


http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/maximum-pit-gain-from-gas-kick-in-water-based-mud/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/maximum-pit-gain-from-gas-kick-in-water-based-mud/http://var/www/apps/conversion/tmp/scratch_5/


24/101

8a>i+u+ Surface 7ressure fro+ ?as @nflu> in ater Based 8ud

6307 psi

Pit volume gain (! 88l

'3 ppg

#.#!$ 88l/ft

8a>i+u+ Surface 7ressure '3 psi

?9pected formation pressure

ill *eight Mud

4nnular Capacit)


25/101

Input Cells

Calculated Cell

&eference

e%site


http://www.drillingformulas.com/ma9imum-surf3ace-pressure-from-gas-influ9-in-water-8ased-mud/


http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/maximum-surf3ace-pressure-from-gas-influx-in-water-based-mud/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/maximum-surf3ace-pressure-from-gas-influx-in-water-based-mud/http://var/www/apps/conversion/tmp/scratch_5/


26/101

0"dr#!tatic Pre!!ure L#!! ue t# 1a! Cut

Mud weight '( ppg

#.#3!( 88l/ft

Pit volume gain '! 88l

.drostatic 7ressure ;oss 'ue to ?as -ut (66 ft

nnular -apacit


27/101


28/101

-alculate @nflu> .eight

7it *olu+e gain '( 88l

nnular -apacit #.#!$ 88l/ft

@nflu> height (6' ft


29/101

Input Cells

Calculated Cell

&eference

e%site


http://www.drillingformulas.com/calculate-influ9-height/


http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/calculate-influx-height/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/calculate-influx-height/http://var/www/apps/conversion/tmp/scratch_5/


30/101

Kill 8ud eight

Shut in Drillpipe Pressure !## psi

Current Mud *eight $.! ppg

1ole TD $### ft

Kill 8ud eight 10#< ppg


31/101

Input Cells

Calculated Cell

&eference

e%site


http://www.drillingformulas.com/shut-down-pumps-weight-up-mud/


http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/shut-down-pumps-weight-up-mud/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/shut-down-pumps-weight-up-mud/http://var/www/apps/conversion/tmp/scratch_5/


32/101

cutal gas +igration rate

Increase in pressure (## psi/hr

Mud *eight '( ppg

4cutal gas migration rate 3(' ft/hr


33/101

Input Cells

Calculated Cell

&eference

e%site


http://www.drillingformulas.com/determine-the-actual-gas-migration-rate/


http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/determine-the-actual-gas-migration-rate/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/determine-the-actual-gas-migration-rate/http://var/www/apps/conversion/tmp/scratch_5/


34/101

sti+ate gas +igration rate )ith an e+pirical euation#

-urrent 8ud eight 1$ ppg

Vg 0#14 ftsec

Vg 510 fthr


35/101

@nput cells

-alculated cells

&eference

e%site


http://www.drillingformulas.com/estimate-gas-migration-rate-in-a-shut-in-well/


http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/estimate-gas-migration-rate-in-a-shut-in-well/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/estimate-gas-migration-rate-in-a-shut-in-well/http://var/www/apps/conversion/tmp/scratch_5/


36/101

sti+ate Tpe of @nflu> (kick!

Shut in casing pressure '#!# psi

Shut in drill pipe pressure 0!# psi

.eight of influ> !# ft

-urrent 8ud eight ' ppg

@nflu> )eight 1#$ ppg

Tpe of influ> ?as @nflu>


37/101

@nput cells

-alculated cells

&eference

http://www.drillingformulas.com/estimate-t)pe-of-influ9-ic/e%site



http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://var/www/apps/conversion/tmp/scratch_5/


38/101

F#rmati#n Pre!!ure 2r#m 3ic' 4nal"!i!

Shut in drill pipe pressure !!# psi

.ole TV' 6### ft

-urrent 8ud eight '#.( ppg

Aor+ation 7ressure 303( psi


39/101

Input cells

Calculated cells

&eference

e%site


http://www.drillingformulas.com/formation-pressure-from-ic-anal)sis/


http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/formation-pressure-from-kick-analysis/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/formation-pressure-from-kick-analysis/http://var/www/apps/conversion/tmp/scratch_5/


40/101

dusted +a>i+u+ allo)a%le shut2in casing pressure for

,ea off test pressure '### psi

Casing shoe TD !## ft

riginal Mud *eight $.! ppg

Current Mud *eight '( ppg

ew M4SICP 415 psi


41/101

ne) +ud )eight

@nput cells

-alculated cells

&eference

e%site


http://www.drillingformulas.com/adusted-ma9imum-allowa8le-shut-in-casing-pressure/


http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/adjusted-maximum-allowable-shut-in-casing-pressure/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/adjusted-maximum-allowable-shut-in-casing-pressure/http://var/www/apps/conversion/tmp/scratch_5/


42/101

8a>i+u+ possi%le influ> height )hen eual to +a>i+u+ allo)a%le shut in casing pressur

8a>i+u+ llo)a%le Shut2@n -asing 7ressure (8S@-7! 70 psi

8ud gradient #.!( psi/ft

@nflu> gradient #.'( psi/ft

8a>i+u+ possi%le influ> height ('7! ft


43/101

@nput cells

-alculated cells

&eference

e%site


http://www.drillingformulas.com/ma9imum-influ9-height-to-e=ual-the-ma9imum-allowa8le-shut-in-casing-pressure


http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/maximum-influx-height-to-equal-the-maximum-allowable-shut-in-casing-pressure/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/maximum-influx-height-to-equal-the-maximum-allowable-shut-in-casing-pressure/http://var/www/apps/conversion/tmp/scratch_5/


44/101

/
http://www.drillingformulas.com/maximum-influx-height-to-equal-the-maximum-allowable-shut-in-casing-pressure/http://www.drillingformulas.com/maximum-influx-height-to-equal-the-maximum-allowable-shut-in-casing-pressure/


45/101

8a>i+u+ @nitial Shut2@n -asing 7ressure (8@S@-7!

;eak off test pressure '! ppg

-urrent +ud )eight '(.( ppg

-asing shoe depth ### ft

8a>i+u+ allo)a%le shut in casing pressure !7(. psi


46/101

@nput cells

-alculated cells

&eference

e%site


http://www.drillingformulas.com/ma9imum-initial-shut-in-casing-pressure-misicp/


http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/maximum-initial-shut-in-casing-pressure-misicp/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/maximum-initial-shut-in-casing-pressure-misicp/http://var/www/apps/conversion/tmp/scratch_5/


47/101

8a>i+u+ for+ation pressure that can )istand )hen shut in the

Kick tolerance factor '.67 ppg

8ud )eight '# ppg

.ole TV' '#### ft

8a>i+u+ for+ation pressure 6"#0 psi


48/101

)ell#

@nput cells

-alculated cells

&eference

e%site


http://www.drillingformulas.com/ma9imum-formation-pressure-that-can-8e-controlled-when-we-shut-t


http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/maximum-formation-pressure-that-can-be-controlled-when-we-shut-the-well-in/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/maximum-formation-pressure-that-can-be-controlled-when-we-shut-the-well-in/http://var/www/apps/conversion/tmp/scratch_5/


49/101

e-well-in/
http://www.drillingformulas.com/maximum-formation-pressure-that-can-be-controlled-when-we-shut-the-well-in/http://www.drillingformulas.com/maximum-formation-pressure-that-can-be-controlled-when-we-shut-the-well-in/


50/101

8a>i+u+ surface pressure fro+ kick tolerance infor+ati

Kick tolerance factor '.67 ppg

Botto+ hole, TV' '#### ft

8a>i+u+ pressure 703.6 psi


51/101

n

@nput cells

-alculated cells

&eference

e%site


http://www.drillingformulas.com/ma9imum-surface-pressure-from-ic-tolerance-factor/


http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/maximum-surface-pressure-from-kick-tolerance-factor/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/maximum-surface-pressure-from-kick-tolerance-factor/http://var/www/apps/conversion/tmp/scratch_5/


52/101

Kick tolerance factor (KTA!

-asing shoe TV' ### ft

ell depth TV' '#### ft

8a>i+u+ allo)a%le +ud )eight '.( ppg

-urrent +ud )eight '# ppg

Kick tolerance factor (KTA! '.67 ppg


53/101

@nput cells

-alculated cells

&eference

e%site


http://www.drillingformulas.com/ic-tolerance-factor-calculation/


http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/kick-tolerance-factor-calculation/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/kick-tolerance-factor-calculation/http://var/www/apps/conversion/tmp/scratch_5/


54/101

Trip +argin calculation

8ud 6ield 7oint '# l%100 s ft

.ole 'ia+eter 7.! in

'rillpipe 'ia+eter .! in

Trip 8argin #.( ppg


55/101

@nput cells

-alculated cells

&eference

e%site


http://www.drillingformulas.com/trip-margin-calculation/


http://var/www/apps/conversion/tmp/scratch_5/http://www.drillingformulas.com/trip-margin-calculation/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/trip-margin-calculation/http://var/www/apps/conversion/tmp/scratch_5/


56/101

Current Mud *eight" ppg '#.# ppg

ew Mud *eight" ppg '3.# ppg

Total mud in the s)stem !##.# 88l

Sacs of 5arite per '## 88l of mud '76.0 sacsTotal sacs of 8arite re=uired $33.3 sacs




olume in 88l increase per '## 88l of mud ''.'' 88l

Total volume increase in 88l !!.!6 88l

Current Mud *eight in ppg '#.# ppg

ew Mud *eight in ppg '3.# ppg

%inal volume in 88l '##.# 88l

Starting volume in 88l $#.## 88l

@ncrease 8ud 'ensit % adding .e+atite

Volu+e of +ud in %%l increase due to +ud )eight increase % adding .e+atite

Starting *olu+e in %%l of original +ud )eight reuired to achie*e a predeter+ined final


57/101

Input cells

Calculated cells

&eference

&eference

&eference

5ac to the first page


http://www.drillingformulas.com/increase-mud-weight-8)-adding-hematite/

http://www.drillingformulas.com/volume-of-mud-increases-due-to-adding-hematite/

olu+e of desired +ud )eight )ith .e+atite

http://www.drillingformulas.com/starting-volume-weight-up-with-hematite/
http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/increase-mud-weight-by-adding-hematite/http://www.drillingformulas.com/volume-of-mud-increases-due-to-adding-hematite/http://www.drillingformulas.com/starting-volume-weight-up-with-hematite/http://www.drillingformulas.com/starting-volume-weight-up-with-hematite/http://www.drillingformulas.com/volume-of-mud-increases-due-to-adding-hematite/http://www.drillingformulas.com/increase-mud-weight-by-adding-hematite/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


58/101




Sacs of 5arite per '## 88l of mud ($7 sacsTotal sacs of 8arite re=uired '$( sacs




olume in 88l increase per '## 88l of mud 3'.!7 88l

Total volume increase in 88l '!0.7$ 88l




Starting volume in 88l 06.## 88l

@ncrease 8ud 'ensit % adding -ar%onate

Volu+e of +ud in %%l increase due to +ud )eight increase % adding -ar%onate



59/101

Input cells

Calculated cells

&eference

&eference

&eference



http://www.drillingformulas.com/increase-mud-weight-8)-adding-calcium-car8onate/

http://www.drillingformulas.com/volume-of-mud-increase-due-to-adding-calcium-car8onate/

olu+e of desired +ud )eight )ith -ar%onate

http://www.drillingformulas.com/starting-volume-of-original-mud-weight-up-with-calcium-car8onate/
http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/increase-mud-weight-by-adding-calcium-carbonate/http://www.drillingformulas.com/volume-of-mud-increase-due-to-adding-calcium-carbonate/http://www.drillingformulas.com/starting-volume-of-original-mud-weight-up-with-calcium-carbonate/http://www.drillingformulas.com/starting-volume-of-original-mud-weight-up-with-calcium-carbonate/http://www.drillingformulas.com/volume-of-mud-increase-due-to-adding-calcium-carbonate/http://www.drillingformulas.com/increase-mud-weight-by-adding-calcium-carbonate/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


60/101

Current Mud *eight" ppg '#.' ppg

ew Mud *eight" ppg ''.' ppg

Total mud in the s)stem '###.# 88l

Sacs of 5arite per '## 88l of mud 6'.! sacs

Total sacs of 8arite re=uired 6'!.' sacs

Current Mud *eight" ppg $.( ppg

ew Mud *eight" ppg '#.' ppg

Total mud in the s)stem 6!#.# 88l

olume in 88l increase per '## 88l of mud 3.6' 88l

Total volume increase in 88l (3.$ 88l




Starting volume in 88l 77.## 88l

@ncrease 8ud 'ensit % adding Barite

Volu+e of +ud in %%l increase due to +ud )eight increase % adding Barite



61/101

Input cells

Calculated cells

&eference

&eference

&eference

e%site



http://www.drillingformulas.com/increase-mud-weight-8)-adding-8arite/

http://www.drillingformulas.com/volume-of-mud-increase-due-to-mud-weight-increase-8)-adding-8arite/

olu+e of desired +ud )eight )ith Barite

http://www.drillingformulas.com/starting-volume-of-original-mud-weight-up-with-8arite/

http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/increase-mud-weight-by-adding-barite/http://www.drillingformulas.com/volume-of-mud-increase-due-to-mud-weight-increase-by-adding-barite/http://www.drillingformulas.com/starting-volume-of-original-mud-weight-up-with-barite/http://www.drillingformulas.com/http://www.drillingformulas.com/http://www.drillingformulas.com/starting-volume-of-original-mud-weight-up-with-barite/http://www.drillingformulas.com/volume-of-mud-increase-due-to-mud-weight-increase-by-adding-barite/http://www.drillingformulas.com/increase-mud-weight-by-adding-barite/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


62/101

'isplac+ent of plain pipe such as casing, tu%ing, etc#

D $.6(! inch

ID 7.73! inch

Displacment in 88l/ft #.#''0 88l/ft


63/101

Input cells

calculated cells

&eferencehttp://www.drillingformulas.com/pipe-displacement-calculation/

e%site



http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


64/101

ccu+ulator -apacit

Suface pplication

olume per 8ottle '# gal

Pre-charge pressure '### psi

Minimum S)stem Pressure '(## psi

perating Pressure 3### psi;sa8le olume per 8ottle !.## gal

Su%sea pplication

olume per 8ottle '# gal

Pre-charge pressure '### psi

Minimum S)stem Pressure '(## psi

perating Pressure 3### psi

Pressure gradient of h)draulic fluid #.! psi/ft

*ater depth '!## ft

;sa8le olume per 8ottle .37 gal


65/101

Input cells

calculated cells

&eference

&eference

e%site



http://www.drillingformulas.com/accumulator-capacit)-usa8le-volume-per-8ottle-calculation-surface-stac/

http://www.drillingformulas.com/accumulator-capacit)-usa8le-volume-per-8ottle-calculation-for-su8sea-8op/

http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/accumulator-capacity-usable-volume-per-bottle-calculation-surface-stack/http://www.drillingformulas.com/accumulator-capacity-usable-volume-per-bottle-calculation-for-subsea-bop/http://www.drillingformulas.com/http://www.drillingformulas.com/http://www.drillingformulas.com/accumulator-capacity-usable-volume-per-bottle-calculation-for-subsea-bop/http://www.drillingformulas.com/accumulator-capacity-usable-volume-per-bottle-calculation-surface-stack/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


66/101

-alculate inner capacit of open hole, inside clindrical o%ects su

1ole si2e" Casing ID" Tu8ing ID" etc 6.'(!

#.#36


(0.3$(


'.!3#6


#.6!33

-alculate capacit in %%lft

Capacit) in 88l/ft

-alculate capacit in ft%%l

Capacit) inft/88l

-alculate capacit in galft

Capacit) in gal/ft

-alculate capacit in ftgal

Capacit) in ft/gal


67/101

h as tu%ulars, drill pipe, drill collars, tu%ing, casing etc

Input cells

calculated cells

&eference

e%site



http://www.drillingformulas.com/calculate-inner-capacit)-of-open-holeinside-c)lindrical-o8ects/

http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/calculate-inner-capacity-of-open-holeinside-cylindrical-objects/http://www.drillingformulas.com/http://www.drillingformulas.com/http://www.drillingformulas.com/calculate-inner-capacity-of-open-holeinside-cylindrical-objects/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


68/101

nnular capacit %et)een casing or hole and drill pipe, tu%in

1ole si2e" casing ID in inch 7.!

Drill pipe si2e" DC si2e or casing/tu8ing D !

#.#!$#

1ole si2e" casing ID in inch 6.'(!

Drill pipe si2e" DC si2e or casing/tu8ing D 3.!

#.03



'.#3'



#.$0#

-alculate annular capacit in %%lft

4nnular capacit)" 88l/ft

-alculate annular capacit in ft%%l

4nnular capacit)" ft/88l

-alculate annular capacit in galft

4nnular capacit)" gal/ft

-alculate annular capacit in ftgal

4nnular capacit)" ft/gal


69/101

, or casing#

Input cells

calculated cells

&eference

e%site



http://www.drillingformulas.com/calculate-annular-capacit)

http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/calculate-annular-capacityhttp://www.drillingformulas.com/http://www.drillingformulas.com/http://www.drillingformulas.com/calculate-annular-capacityhttp://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


70/101

7u+p 7ressure and 7u+p Stroke &elationship

Basic -alculation

Current Circulating Pressure" psi (!##

ld Pump


71/101

Input cells

calculated cells

&eference

e%site



http://www.drillingformulas.com/pump-pressure-and-pump-stroe-relationship/

http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/pump-pressure-and-pump-stroke-relationship/http://www.drillingformulas.com/http://www.drillingformulas.com/http://www.drillingformulas.com/pump-pressure-and-pump-stroke-relationship/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


72/101

-alculate ui*alent -irculating 'ensit )ith ngineering Aor+ula

Mud weight '3.(


73/101

Input cells

calculated cells

&eference

e%site



http://www.drillingformulas.com/calculate-e=uivalent-circulation-densit)-ecd-with-comple9-engineering-e=uations/

http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/calculate-equivalent-circulation-density-ecd-with-complex-engineering-equations/http://www.drillingformulas.com/http://www.drillingformulas.com/http://www.drillingformulas.com/calculate-equivalent-circulation-density-ecd-with-complex-engineering-equations/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


74/101
http://www.drillingformulas.com/calculate-equivalent-circulation-density-ecd-with-complex-engineering-equations/


75/101

Leak Off Test Pressure Converted to Equivalent Mud

,T pressure @psiA '6## psi

Mud *eight @ppgA $.( ppg

Shoe Depth @TDA ### ft

,T e=uivalent mud weight '6.$ ppg


76/101

eight (LOT)

Input cells

calculated cells

&eference

e%site



http://www.drillingformulas.com/lea-off-test-procedures-and-calcuation-(/

http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/leak-off-test-procedures-and-calcuation-2/http://www.drillingformulas.com/http://www.drillingformulas.com/http://www.drillingformulas.com/leak-off-test-procedures-and-calcuation-2/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


77/101

Pressure Required Formation ntegrit! Test (FT)%IT re=uired @ppgA '.! ppg

Mud *eight @ppgA $.( ppg

Shoe Depth @TDA ### ft

Pressure re=uired @psiA ''#(.


78/101

Input cells

calculated cells

&eference

e%site



http://www.drillingformulas.com/formation-integrit)-test-fit/

http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/formation-integrity-test-fit/http://www.drillingformulas.com/http://www.drillingformulas.com/http://www.drillingformulas.com/formation-integrity-test-fit/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


79/101

Equivalent Cir"ulating #ensit! (EC#)$ %%g4nnular pressure loss@psiA ## psi

Mud weight @ppgA '# ppg

TD @ftA 7### ft

?CD ''.# PP+


80/101

Input cells

calculated cells

&eference

e%site



http://www.drillingformulas.com/e=uivalent-circulating-densit)-ecd-in-ppg/

http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/equivalent-circulating-density-ecd-in-ppg/http://www.drillingformulas.com/http://www.drillingformulas.com/http://www.drillingformulas.com/equivalent-circulating-density-ecd-in-ppg/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


81/101

Specific ?ra*it (S?!Specific gra*it using +ud )eight, ppgMud weight @ppgA '3 ppg

S+ '.!6

Specific gra*it using pressure gradient, psiftPressure gradient @psi/ftA #.!# psi/ft

S+ '.'!

Mud weight @l8/ft3A $#.## l8/ft3

S+ '.

-on*ert specific gra*it to +ud )eight, ppgS+ '.!#

M* @ppgA '(.!# ppg

-on*ert specific gra*it to pressure gradient, psiftS+ '.!#

Pressure +radient @psi/ftA #.6!# psi/ft

S+ '.!#

Mud weight @l8/ft3A $3.6## l8/ft3

Specific gra*it using +ud )eight, l%ft3

-on*ert specific gra*it to +ud )eight, l%ft3


82/101

Input cells

calculated cells

e%site

&eference

&eference




http://www.drillingformulas.com/calculate-specific-gravit)-sg-in-oilfield-unit/

http://www.drillingformulas.com/convert-specific-gravit)-to-mud-weight-ppg-and-l8ft3-and-pressure-gradient-psift/
http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/calculate-specific-gravity-sg-in-oilfield-unit/http://www.drillingformulas.com/convert-specific-gravity-to-mud-weight-ppg-and-lbft3-and-pressure-gradient-psift/http://www.drillingformulas.com/convert-specific-gravity-to-mud-weight-ppg-and-lbft3-and-pressure-gradient-psift/http://www.drillingformulas.com/calculate-specific-gravity-sg-in-oilfield-unit/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


83/101
http://www.drillingformulas.com/convert-specific-gravity-to-mud-weight-ppg-and-lbft3-and-pressure-gradient-psift/


84/101

-on*erting 7ressure into 8ud eight-on*ert pressure, psi, into +ud )eight, ppg using feet as the unit of +easurePressure @psiA !### psi

TD @ftA 7### ft

M* @ppgA '(.# PP+

-on*ert pressure, psi, into +ud )eight, ppg using +eters as the unit of +easurePressure @psiA !### psi

TD @mA (!## m

M* @ppgA ''.0 PP+


85/101

Input cells

calculated cells

&eference

e%site



http://www.drillingformulas.com/convert-pressure-into-e=uivalent-mud-weight/

http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/convert-pressure-into-equivalent-mud-weight/http://www.drillingformulas.com/http://www.drillingformulas.com/http://www.drillingformulas.com/convert-pressure-into-equivalent-mud-weight/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


86/101

Barrels of slug reuired for a desired length of dr pipe

Desired length of dr) pipe @ftA ## ft

Drill pipe capacit) @88l/ftA #.#'! 88l/ft

Current M* @PP+A ''.! ppg

Slug *eight @PP+A '(.! ppg

1)drostatic pressure re=uired to give desired drop inside drill pipe (3$.( psi

Difference in pressure gradient 8w slug and current M* #.#!( psi/ft

,ength of slug in drill pipe @ftA 6## ft

Slug Volu+e


87/101

Input cells

calculated cells

e%site

&eference

http://www.drillingformulas.com/8arrels-of-slug-re=uired-for-desired-length-of-dr)-pipe/

&eference




http://www.drillingformulas.com/weight-of-slug-re=uired-for-desired-length-of-dr)-pipe-with-set-volume-of-slug/
http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/http://www.drillingformulas.com/weight-of-slug-required-for-desired-length-of-dry-pipe-with-set-volume-of-slug/http://www.drillingformulas.com/weight-of-slug-required-for-desired-length-of-dry-pipe-with-set-volume-of-slug/http://www.drillingformulas.com/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


88/101

.drostatic 7ressure (.7!

.drostatic pressure using ppg and feet as the units of +eaMud weight '( ppg

TD @ftA '#### ft

1)drostatic Pressure @psiA 6(#.# psi

.drostatic pressure, psi, using pressure gradient, psiftPressure gradient @psi/ftA #.! psi/ft

TD @ftA '#### ft

1)drostatic Pressure @psiA !###.# psi

Mud weight @l8/ft3A 7# l8/ft3

TD @ftA '#### ft

1)drostatic Pressure @psiA !!!!.( psi

.drostatic pressure, psi, using +eters as unit of depthMud weight '( ppg

TD @mA !### m

1)drostatic Pressure @psiA '#(36.0 psi

.drostatic pressure, psi, using +ud )eight, l%ft3


89/101

sureInput cells

calculated cells

&eference

http://www.drillingformulas.com/h)drostatic-pressure-calculation/

e%site





90/101

&nnular 'elo"it! (&') in ftminAor+ula 1 V D pu+p output, %%l+in E annular capacit, %%lft

Pump out put @88l/minA '# 88l/min

4nnular capacit) @88l/ftA #.'3 88l/ft

4nnular elocit) @4A 06.$( ft/min

Aor+ula $ Alo) rate in gp+ and dia+eter %et)een $ dia+eters%low rate @gpmA 7## gpm

5igger diameter @inA '# in such as hole si2e" casing ID" etc

Smaller diameter @inA ! in such as drill pipe D" tu8ing D" etc

4nnular elocit) @4A (6'.33 ft/min

Aor+ula 3 flo) rate in %%l+in and dia+eter

%low rate @88l/minA '3 88l/min

5igger diameter @inA '# in such as hole si2e" casing ID" etc

Smaller diameter @inA ! in such as drill pipe D" tu8ing D" etc

4nnular elocit) @4A '07.3 ft/min

&nnular velo"it! (&')$ ftse"Aor+ula 1 Alo) rate in %%l+in and dia+eter %et)een $ dia+eters%low rate @88l/minA '3 88l/min

5igger diameter @inA '# in

Smaller diameter @inA ! in

4nnular elocit) @4A (.$0 ft/sec

7u+p output in gp+ reuired for a desired annular *elocit, ft+i+

4nnular elocit) @ft/minA '(# ft/min

5igger diameter @inA '# in

Smaller diameter @inA ! in


91/101

Input cells

calculated cells

&eference

e%site



http://www.drillingformulas.com/annular-velocit)-calculation/

http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/annular-velocity-calculation/http://www.drillingformulas.com/http://www.drillingformulas.com/http://www.drillingformulas.com/annular-velocity-calculation/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


92/101

Pum% outTri%le Pum%$ **lstkefficienc) @EA $0

,iner diameter @inA 6 in

Stroe length @inA '( in

P @88l/stA #.'#'73 88l/st

#u%le Pum% $ **lstkefficienc) @EA 7!

,iner diameter @inA 6 in


93/101

Input cells

calculated cells

&eference

e%site



http://www.drillingformulas.com/pump-output-calculation-for-duple9-pump-and-triple9-pump/

http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/pump-output-calculation-for-duplex-pump-and-triplex-pump/http://www.drillingformulas.com/http://www.drillingformulas.com/http://www.drillingformulas.com/pump-output-calculation-for-duplex-pump-and-triplex-pump/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


94/101

7ressure ?radient -alculation7ressure gradient, psift, using +ud )eight, ppgM* @ppgA $ PP+

Pressure gradient @psi/ftA #.67 psi/ft

M* @l8/ft3A 7# l8/ft3

Pressure gradient @psi/ftA #.!!6 psi/ft

7ressure gradient, psift, using +ud )eight, specific gra*it (S?!M* sg (

Pressure gradient @psi/ftA #.766 psi/ft

-on*ert pressure gradient, psift, to +ud )eight, ppgPressure gradient @psi/ftA #.! psi/ft

M* @ppgA $.6( PP+

-on*ert pressure gradient, psift, to +ud )eight, l%ft3Pressure gradient @psi/ftA #.! psi/ft

M* @ppgA 0(.## l8/ft3

-on*ert pressure gradient, psift, to +ud )eight specific gra*it (S?!Pressure gradient @psi/ftA #.! psi/ft

Specific +ravit) '.'!!

7ressure gradient, psift, using +ud )eight, l%ft3


95/101

Input cells

calculated cells

&eference

e%site



http://www.drillingformulas.com/calculate-pressure-gradient/

http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://www.drillingformulas.com/calculate-pressure-gradient/http://www.drillingformulas.com/http://www.drillingformulas.com/http://www.drillingformulas.com/calculate-pressure-gradient/http://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


96/101

ccu+ulator 7re2charge 7ressure

P start 3###

P final (###

olume removed (!

olume total (##

4verage pre charge pressure 0!#


97/101

Input cells

calculated cells


http://var/www/apps/conversion/tmp/scratch_5/http://bit.ly/HExXfIhttp://bit.ly/HExXfIhttp://var/www/apps/conversion/tmp/scratch_5/


98/101

1)drostatic pressure to lose (## psi

Casing capacit) #.#703 88l/ft

Pipe displacement #.#'706 88l/ft

Mud weight '( PP+

%eet of drill pipe pulled ''0' ft

E of volume in drill pipe out of hole '## E

1)drostatic pressure to lose (## psi

Pipe displacement #.##!! 88l/ft

Pipe capacit) #.#'706 88l/ft

Casing capacit) #.#703 88l/ft

Mud *eight '( PP+

%eet of drill pipe pulled 733 ft

.o) +an feet of drill pipe pulled to lose certain a+oun

.o) +an feet of drill pipe pulled to lose certain a+oun


99/101

Input cells

calculated cells

&eference

http://www.drillingformulas.com/drill-pipe-pulled-to-lose-h)drostatic-pressure/

e%site

t of hdrostatic pressure (psi! )hen pull dr#



t of hdrostatic pressure (psi! )henpull )et#



100/101

.drostatic 7ressure (.7! 'ecrease hen 7FF.hen pulling '&6 pipeStands pulled '# stands

,ength per stand $' ft


Casing capacit) #.#703 88l/ftMud *eight '( PP+

55, displace !.#' 88l

1P decrease @psiA 37.'7 psi

hen pulling T pipe

'##

Stands pulled '# stands

,ength per stand $' ft


Pipe capacit) #.#'706 88l/ftCasing capacit) #.#703 88l/ft

Mud *eight '(.# PP+

55, displace ((.#7 88l

1P decrease @psiA ('7.!( Psi

E of volume in drill pipe outof hole


101/101

Input cells

calculated cells

&eference

http://www.drillingformulas.com/h)drostatic-pressure-decrease-when-pooh/

e%site




well control formulas drillingformula

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