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FIELD OPERATING HANDBOOK· VOL. II November 1984 c : 0 '" ' to " '~ " ~ a ~ ., ~ . . .0 " :c c U1 " .; ; " ' 0 'f 3 " 0 >- 'o a .0 > - C '" S '~ ' 0 " " ., " ~ i i 5 i c 3 : a - -.c " 0 " . . c: '" .2 , , - 'a' 0 <. > '" .0 a c - ' 1;; " E .!:: c: : ,!:: «i § .E .s -. ; '. g " " 'E a c '" c c a <. > E " E " <. > a '" '" : < : I- ;--, SAF· G5 WELL TESTING b} Basic Rules for Utilization Normally after the well stream leaves the Well Head, the pressure is reduced in stages. After the pressure is reduced, process components of lower pressure rating may be used. The rule is that a pressure containing process component should: ~ either be designed to withstand the maximum internal pressure which can be exerted on it under any con~ ditions, - or be protected by a pressu e relieving devfce [Safety Relief Valve or Rupture Disc). To determine the system design pressure ratings it is necessary to show pressure rating boundaries on mechanical flow sheets such as shown on page SAF.6. Each section of flow line or process component has an assigned operating p re ss ur e, e .g .: ~ From the Flowhead down to the Floor Cho~e Manifold the working pressure must be higher than the shut-in tubing pressure. This will lead to the choice of the Floor Choke Manifold Assembly. ! FOR SUB EQUENT SECTIONS THE WORKING PRESSURE IS DETERMINED TO SUIT PIPING CONNECTIONS. Pipings and/or equipme ts are coiour coded to recognize their working pressure: Orange m ea ns 3000 p s i WP ( 6000 p s i TP ) R e d 5000 p s i WP (10000 ps.i T P ) Black 10000 ps i W P (15000 p s i T P ) White 15000 psi WP (22500 p s i T P ) The item with the lowest pressure rati~g within a section determines the pressure rating of this section Make sure the Well Head equipment down to the Choke Manifold is able to withstand the maximum expected shut-in pressure., All other components are protected by making sure that pressure will_always ,remain lower than, the rat,ed_, working pressure. For all com onents where working pressure is lower than the shut-in Well Head pressure, this protection is provided by a normally closed (NC) Surface Safety Valve (SSV) located on the flow line and remotely controlled by pilots preferably located on each pre sure section. These pilots are adjusted to respond whenever pressure increases above the allowed W.P. of each of these sections. O n high pressure tests (5000 p s i < WHP < 10000 psi) or in case of sour gas, the Surface Safety Valve must be installed upstream of the Floor Choke Manifold. The Surface Safety Valve is actuated by flow line pressure sensors provided on each fl w line segment of different working pressure down to the separator. ' Additional safety is insured by the use of an emergency shut-down system JESD) cting on the Flaw line Valve of the Flowhead. Use of ESD is strongly recommended whenever WH pressure exceeds 5000 p si . O n very high pressure,tests (10000 p si < WHP < 15000 p s i 1 there is an Automatic Choke, reducing the pressure to 10000 psi immediately after the Flow Line Valve. All preceeding remarks remain valid. In case of sour gas or high pressure tests (> 5000 psi) it is mandatory that one of the ESD stations be set-up at the separator, other stat10ns will be set-up accord,ng to th~ customer's lnstruct1ons. However l t IS recommended that the stations to shut-in the ESD be provided on each flow line segment of diffe- rent working pressure down to the oil and gas manifolds. When no Surface Safety Valve is use , it is the operator's res onsibility to check and make sure that the pressure always remain lower than the worki g pressure assigned to each section. The separator is provided with pressure relieving devices (Farris Safety Valve and Rupture Disc).

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F IE LD O PE RA TIN G H AN DB OO K· V OL . II

N o ve m be r 1 98 4

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SAF · G 5

W E L L T E S T IN G

b } B as ic R u les for U tiliza tion

N o r m a l l y a f t e r t h e w e l l s t r e a m l e a v e s t h e W e l l H e a d , t h e p r e s s u r e i s r e d u c e d i n s t a g e s . A f t e r t h e p r e s s u r ei s r e d u c e d , p r o c e s s c o m p o n e n t s o f l o w e r p r e s s u r e r a t i n g m a y b e u s e d .

T h e r u l e i s t h a t a p r e s s u r e c o n t a i n i n g p r o c e s s c o m p o n e n t s h o u l d :

~ e i t h e r b e d e s i g n e d t o w i t h s t a n d t h e m a x i m u m i n t e r n a l p r e s s u r e w h i c h c a n b e e x e r t e d o n i t u n d e r a n y c o n ~d i t i o n s ,

- o r b e p r o t e c t e d b y a p r e s s u r e r e l i e v i n g d e v f c e [ S a f e t y R e l i e f V a l v e o r R u p t u r e D i s c ) .

T o d e t e r m i n e t h e s y s t e m d e s i g n p r e s s u r e r a t i n g s i t i s n e c e s s a r y to s h o w p r e s s u r e r a t i n g b o u n d a r i e s o nm e c h a n i c a l f l o w s h e e t s s u c h a s s h o w n o n p a g e S A F . 6 . E a c h s e c t i o n o f f l o w l i n e o r p r o c e s s c o m p o n e n t h a s a na ss ig ne d o p er at in g p re ss ur e, e .g .:

~ F r o m t h e F l o w h e a d d o w n t o t h e F l o o r C h o ~ e M a n i f o l d t h e w o r k i n g p r e s s u r e m u s t b e h i g h e r t h a n t h e s h u t - i nt u b i n g p r e s s u r e . T h i s w i l l l e a d t o t h e c h o i c e o f t h e F l o o r C h o k e M a n i f o l d A s s e m b l y .

!F O R S U B S E Q U E N T S E C T I O N S T H E W O R K I N G P R E S S U R E I S D E T E R M I N E D T O S U I T P I P I N G C O N N E C T I O N S .

P i p i n g s a n d / o r e q u i p m e n t s a r e c o i o u r c o d e d t o r e c o g n i z e t h e i r w o r k i n g p r e s s u r e :

O ra ng e m ea ns 3000 p s i W P ( 6000 p s i T P )

R e d 5000 p s i W P (10000 ps. i T P )

B l a c k 10000 p s i W P (15000 p s i T P )

W h i t e 15000 p s i W P (22500 p s i T P )

T h e i t e m w i t h t h e l o w e s t p r e s s u r e r a t i ~ g w i t h i n a s e c t i o n d e t e r m i n e s t h e p r e s s u r e r a t i n g o f t h i s s e c t i o n

M a k e s u r e t h e W e l l H e a d e q u i p m e n t d o w n t o t h e C h o k e M a n i f o l d i s a b l e to w i t h s t a n d t h e m a x i m u m e x p e c t e ds h ut - in p r es s u r e .,

A l l o t h e r c o m p o n e n t s a r e p r o t e c t e d b y m a k i n g s u r e t h a t p r e s s u r e w i l l _ a l w a y s , r e m a i n l o w e r t h a n , t h e r a t , e d _ ,

w o r k i n g p r e s s u r e .

F o r a l l c o m p o n e n t s w h e r e w o r k i n g p r e s s u r e i s l o w e r t h a n t h e s h u t - i n W e l l H e a d p r e s s u r e , t h i s p r o t e c t i o ni s p r o v i d e d b y a n o r m a l l y c l o s e d ( N C ) S u r f a c e S a f e t y V a l v e ( S S V ) l o c a t e d o n t h e f l o w l i n e a n d r e m o t e l yc o n t r o l l e d b y p i l o t s p r e f e r a b l y l o c a t e d o n e a c h p r e s s u r e s e c t i o n . T h e s e p i l o t s a r e a d j u s t e d to r e s p o n dw h e n e v e r p r e s s u r e i n c r e a s e s a b o v e t h e a l l o w e d W . P . o f e a c h o f t h e s e s e c t i o n s .

O n h i g h p r e s s u r e t e s t s (5000 p s i < W H P < 10000 p s i ) o r i n c a s e o f s o u r g a s , t h e S u r f a c e S a f e t y V a l v em u s t b e i n s t a l l e d u p s t r e a m o f t h e F l o o r C h o k e M a n i f o l d .

T h e S u r f a c e S a f e t y V a l v e i s a c t u a t e d by f l o w l i n e p r e s s u r e s e n s o r s p r o v i d e d o n e a c h f l o w l i n e s e g m e n t o fd i f f e r e n t w o r k i n g p r e s s u r e d o w n t o t h e s e p a r a t o r . '

A d d i t i o n a l s a f e t y i s i n s u r e d b y t h e u s e o f a n e m e r g e n c y s h u t - d o w n s y s t e m J E S D ) a c t i n g o n t h e F l a w l i n eV a l v e o f t h e F l o w h e a d . U s e o f E S D i s s t r o n g l y r e c o m m e n d e d w h e n e v e r W H p r e s s u r e e x c e e d s 5000 p si .

O n v e r y h i g h p r e ss u r e, t e st s (10000 p s i < W H P < 15000 p s i 1 t h e r e i s a n A u t o m a t i c C h o k e , r e d u c i n g t h ep r e s s u r e to 10000 p s i i m m e d i a t e l y a f t e r t h e F l o w L i n e V a l v e . A l l p r e c e e d i n g r e m a r k s r e m a i n v a l i d.

I n c a s e o f s o u r g a s o r h i g h p r e s s u r e t e s t s (> 5000 p s i ) i t i s m a n d a t o r y t h a t o n e o f t h e E S D s t a t i o n s b es e t - u p a t t h e s e p a r a t o r , o t h e r s t a t 1 0 n s w i l l b e s e t - u p a c c o r d , n g t o t h ~ c u s t o m e r ' s l n s t r u c t 1 o n s . H o w e v e rl t IS r e c o m m e n d e d t h a t t h e s t a t i o n s t o s h u t - i n t h e E S D b e p r o v i d e d o n e a c h f l o w l i n e s e g m e n t o f d i f f e -r e n t w o r k i n g p r e s s u r e d o w n t o t h e o i l a n d g a s m a n i f o l d s .

W h e n n o S u r f a c e S a f e t y V a l v e i s u s e d , i t i s t h e o p e r a t o r ' s r e s p o n s i b i l i t y t o c h e c k a n d m a k e s u r e t h a tt h e p r e s s u r e a l w a y s r e m a i n l o w e r t h a n t h e w o r k i n g p r e s s u r e a s s i g n e d t o e a c h s e c t i o n .

T h e s e p a r a t o r i s p r o v i d e d w i t h p r e s s u r e r e l i e v i n g d e v i c e s ( F a r r i s S a f e t y V a l v e a n d R u p t u r e D i s c ) .

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F I E L D O P E R A T I N G H A N D B O O K · V O L . I I

W E L L T E S T IN G

SA F · G 6

No v emb e r 1 9 84

c ) P r a c tic a l H in t 5

T o r q u e s t o m a k e - u p s u b - a s s e m b l i e s t o g e t h e r m u s t s t r i c t l y b e o b s e r v e d ( s e e r e l e v a n t c h a p t e r s ) .

U s e o n l y r e c o m m e n d e d f i t t i n q s a n d c o n n e c t i o n s 1 i s t e d i n C h a p t e r I I I " G E N E R A L I N F O R M A T I O N " .

H a v e e n o u g h C h i c k s a n s b e t w e e n F l o w h e a d a n d f l o o r , o n f l o a t i n g r i g s t o a l l o w f o r m a x i m u m e x p e c t e d h e a v em o t i o n .

I n c a s e o f g a s , i f u s e o f C h i k s a n c a n n o t b e a v o i d e d , g r e a s e t h e B a l l B e a r i n g s o f C h i k s a n S w i v e l s a n dc h a n g e t h e p a c k i n g b e f o r e t e s t l n g .

C h o k e s s h a l l e x c l u s i v e l y b e u s e d f o r f l o w c o n t r o l . N E V E R U S E T H E M T O S H U T - I N T H E F L O W . A n y f l u i d f l o w i n gt h r o u g h a c h o k e m u s t a r r i v e p e r p e n d i c u l a r y t o t h e n e e d l e o f t h e c h o k e a n d l e a . v e i t i n t h e d i r e c t i o n o ft h e n e e d l e t i p ,

G a u g e t a n k s s h o u l d b e g r o u n d e d b y a c a b l e a l l o w i n g s t a t i c e l e c t r i c i t y ( g e n e r a t e d b y f r i c t i o n o f f l o w i n gf l u i d s ) t o f l o w a n d a v o i d i n g f l a s h e s . T h i s c a b l e s h o u l d h a v e a m i n i m u m s e c t i o n o f 1 c m 2 .

O f f - s h o r e , i t i s c o n n e c t e d t o a b l a n k s p o t f r e e o f p a i n t o r g r e a s e o n t h e b a r g e .

O n - s h o r e , t h e g r o u n d s h o u l d b e a n i r o n s t a k e a t l e a s t 1 m l o n g , d r i v e n i n t o t h e e a r t h a n d w a t e r e d r e g u -1 a r i l y ( o n c e a d a y ) .

I N N O C A S E A l l O W G A S T O F L O W T O T H E T A N K .

P e c u l i a r p r e c a u t i o n s m u s t b e t a k e n i n t e s t i n g w e l l s p r o d u c i n g s a n d o r s e d i m e n t s s i n c e t h i s m a y l e a d t of a s t e r o s i o n o f t h e p i p e s a n d e q u i p m e n t , e s p e c i a l l y if v e l o c i t y i s m o r e t h a n 3 0 m / s e c . I n s u c h c a s e sc o n s t a n t m o n i t o r i n g o f s a n d p r o d u c t i o n a n d u s e o f s a n d t r a p s i s h i g h l y r e c o m m e n d e d . ( S e e F Q H I V - S A N DM E A S U R E M E N T S ) •

C O R R O S I O N D E T E C T I O N I N W . T . E Q U I P M E N T P I P E S

I n t h e F I T - T R I M p r o c e d u r e s f o r :

- M a n i f o l d s

H ea t er s - S te am E x ch an g er s,

- S ep ar at o rs , • ..

it i s r e c o m m e n d e d t o p e r f o r m a t h i c k n e s s m e a s u r e m e n t o f t h e a c c e s s i b l e p i p e w a l l s w i t h a n U l t r a s o n i cT h i c k n e s s D e t e c t o r s u c h a s t h e " K r a u t k r e m e r D M 2 " .

T h i s d e t e c t o r i s a l r e a d y i n c l u d e d i n t h e 2 c h a n n e l y o r t a b l e S A N D E C e q u i p m e n t u n d e r L 8 4 2 8 4 7 .

M e a s u r e m e n t s s h o u l d b e m a d e o n i n l e t a n d o u t l e t e l b o w s , t e e s . . • e t c . w h e r e m a x i m u m e r o s i o n i s t o b e e x -p e c t e d .

A r e c o r d o f t h e t h i c k n e s s m e a s u r e m e n t o n f i x e d r e f e r e n c e p o i n t s c h o o s e n b y t h e o p e r a t o r w i l l h e l p t ot r a c e c o r r o s i o n o r ' e r o s i o n a n d a v o i d u n e x p e c t e d f a i l u r e s .

T h e " k r a u t k r a m e r O M 2 " w o r k s i n a m b i e n t t e m p e r a t u r e s r a n g i n g f r o m - 1 0 t o S O · C ( 1 5 t o 1 2 5 · F ) . -

W i t h a s p e c i a l S e n s o r l t c a n o p e r a t e o n h o t s u r f a c e s u p t o 2 0 0 · C ( 4 0 0 · F ) .

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SA F · G 7F I E L D O P E R A T I N G 'H A N D B O O K · V O L . I I

W E L L T E S T IN G N o vem be r 1 98 4

d) P r e s s u r e Te s t s

Prior to any pressure test, m ake sure that ai l flow 1 ines are safety anchored or chained down to .ther ig.

P ressure tests are conducted eXclusively w ith water. W ater may be added w ith corrosion inhibi tors.

It is recommended to let water ffow ,rapidly through the well testing system to sweep out air or gas thatmay be trapped in hi gh spots. " ','c

. g':l'c'"OJo

Also one thiQg must be clear:

If the API requires that for equ i~me~ts' rated at less than 10000 psi w p the test pressure is 200% of theWP and for equ ipments rated at 100 'OO-,;PSI WP and above the test pressure is 150% of the WP, it m ust beunderstood that these test pressures.vapp ly only for officia l tests, performed at shops w ith adequatefaei l i ties.

IN NO CASE THE RULE SHOULD A PPLY AT THE W ELL SIrE, WHERE A PRESSURE TEST AT M AXIM UM100% OF W P IS ONLYAUT HOR !ZED.

Oevices protected w ith bursting heads or rupture discs shall never be tested at 100% WP, unless thesafety device is removed and replaced by a plug .

A safe lim it for testing these devices is 90% o(WP:-

The record of the pressure tests shoul d be inc'luae<ftn the 'fi .n:al test report. U se the Foxboro Recorderor the DOWELL-SCHLUM BERGERor any other recordera":.~ ,H ab 1 e. '

The fo llow ing pressure testing sequence is mandatory p.rior to any well opening . The d ifferen t sub-assembl i e s are supposed pressure tested i nd i vi dually accord t o s to ' the R ITE PROGRAMME(See rel evantChapters) .

Should the customer requ ires exhaustive testing of the F loor Choke M anifo ld and the Heater's coil s ,B lanking P lugs m ust be installed instead of adjustab le and/or fixed chokes.

O therw ise, always, close the valves located IM MED IATELYUPSTREAMof the Chokes.

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dl-Te s t in g the l in e s

The differen t sections must be hydraulically tested at working pressure .

I S e e tab le and P ressure sequence diagram he re afte r IBest is to use a Serv ice Company pumping unit connected to the kill line of the Flow Head.

d2-Che ckin g the Safety c i r cu i t s

SSV and ESD operation should be checked during § 1 "Testing the Lines".

Do not forget that CAC Actuator located on the Flow Line V alve of the F lopetroT F low Head has a SafetyHead fitted w ith a Bursting D isc (Reference BAKER WH - DBMF - BOO) shearing at 7500 psi (525 bar).

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lD O N OT EX CE ED A N H YD RA ULIC PR ESSU RE O F 6500 PSI IN T HIS C IR CU IT. I

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F IE LD O PE RA TIN G H AN DB OO K· V OL . II

W ELL TES T IN G

SA F · G 8

N o v em b e r 1 98 4

TABLE - PRESSURE TES T ING SEOUENCES

W T E Q UI P M EN T N O M I NA L R A T IN G

1 5 0 00 p s i 1 0 0 0 0 p s i 5 0 0 0 p s i

T e s t P r e s . M a x

s e q u e n c ~

0 1 5 0 0 0 N R N R

C D 1 0 0 0 0 N R N R

R E M A R K S

B l a n k c h o k e a t ~ . T h e n t e s t a t 1 0 0 0 0 p s iw i th M a n if o l d U p st r e am V a lv e s c l os e d.

B l a n k c h o k e s a t ~ i f r e q u e s t e d . T h e n ,t e s t w i t h c h o k e s i n p l a c e a n d M a n i f o l d U p -s t r e a m V al v e s c l o se d .

B l a n k c h o k e s a t ( E ) i f r e qu e st e d.T h e n t e s t w i t h c h o k e s i n p l a c e a n d M a n i f o l dU p s tr e a m V a l ve s c lo s e d.

1 0 0 0 0N R 5 0 0 0

5 0 0 0 p s i H e a t e ro r 5000 B l a n k c h o k e a t @ a n d B y- P a ss V a l ve c l o se d

S t e a m E x c h a n g e r 5 0 0 0 3000 i f H P c o i l t e s t r e q u e s t e d . O t h e r w i s e c l o s e

GI---------+-----I-------+-----i I n l e t a nd B y -P a ss V a l ve o f H ea t er / S te a mE x c h a n g e r .

1 0 0 0 0 p s i S t e a mE x c h a n g e r * *

7 2 0 S a m e a s a b o v e b u t 7 2 0 o r 6 0 0 p s i s e p a r a t o ru s e d .

3 0 0 0 3000 T h i s t e s t o n l y if P l u g i n s t a l l e d a t G ) o r Q ) .3 0 0 0

2 1 4 4 0 N o p l u g a t ( § ) o r (f) - 1 4 4 0 p s i s e p a r a t o ru s e d . I n l e t M a n u a l V a l v e a n d B y - P a s s M a n u a lV a lv e o f S e p ar a to r closed,

1 4 4 0 1440

3 7 2 0 7 2 0

3 0 0 0 3 0 0 0 T h is t e s t o n ly i f H e a te r / St e am E x c ha n ge rn o t u s e d a n d P l u g i n s t a l l e d a t ~ o r C ! ) .O t h e r wi s e r ef e r to E 2 a n d E 3 .

3 0 0 0

1 1 0 0 0 1 0 0 0 1 0 0 0 1 4 4 0 p s i S e r a r a t o r :M a n u a l I nl e t V a l ve o f S e pa r a to r c l o s ed .M a nu a l O u t le t ( o il & g as ) o f S e p ar a t orc l o s e d .

C DB y -P a s s V a l ve o p en .P l u g s a t ®.

2 7 2 0 7 2 0 · 7 2 0 7 2 0 o r 6 0 0 p s i S e p a r a t o r :S a m e a s a b o v e .

* W h e n u s i n g 1 0 0 0 0 p s i W P S t e a m E x c h a n g e r , F l o o r C h o k e M a n i f o l d i s n o r m a l l y n o t u s e d :

T e s t p r e ss u r e f o r s e q ue n ce C D + G) i s t h u s 1 0 0 0 0 p s i f o r W T e q u i p m e n t 1 5 0 0 0 p s i n o m i n a l p r e s s u r e .

0+ @ i s t h u s 1 0 0 0 0 p s i f o r W T e q u i p m e n t 1 0 0 0 0 p s i n o m i n a l p r e s s u r e .

Page 5: SLB FIELD HANDBOOK 1984

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F I E L D O P E R A T I N G H A N D B O O K - V O L . I I

W E L L T E S T IN G Nov embe r 1 98 4

S A F · G 9

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H EA TER /S T EAM EXC H .

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G A S F L A R E ~ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ~

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M A N I F O L D

I I I .

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Page 6: SLB FIELD HANDBOOK 1984

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F IE LD O PE RA TIN G H AN D BO O K· V OL . II

W E L L T E S T IN G

SA F · G 10

N o vem be r 1 98 4

e ) E qu ip m en t In sta lla tio n

e1- Safety standards.

The following standards, whichever the no st stringents, have been excerpted either from the APIRP 500 B or from the Safety Recommendations issued by the French Association of the Oil and Gas Ex-plorers and Producers:

Although the spirit of both reglementations does not differ very much, the API RP 500 B is res-tricted to the classification of areas for tlectrical Installations at drilling rigs and productionfacilities on land and off-shore, whereas the French Recommendations cover also disposition of openfires and engines.

There is also a Flopetrol policy, based on experience, to recommend that classified areas within awell testing set-up should not cross or overlap.

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Page 7: SLB FIELD HANDBOOK 1984

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F I E L D O P E R A T IN G H A N D B O O K - V O L . I I

W E L L T E S T IN G

SAF · G 11

N o v emb e r 1 9 84

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C O R R E S P O N D E N C E B E T W E E N U . S . A N D F R E N e H S T A N D A R D S

u s

C l a s s I , D i v i s i o n 1

F r e n c h

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, '.

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G r o u p A

A tm o s ph er e s c on ta i n in g a c e ty le n e

C at e go r y A

G a s o r l i qu i d h yd ro c ar bo ns

G r o u p B C a t e g o r y B

A t m o s p h e r e s c o n t a i n i n g b u t a d i e n e , e t h y l e n e L i q u i d h y d r o c a r b o n s h a v i n g a f l a s h p o i n t < 5 5 ° Co xi de , h y d ro ge n , p ro py l e ne o xi d e , m an uf a c tu re dg a s e s c o n t a i n i n g m o r e t h a n 30 % h yd ro ge n ( byv o l u m e)

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A tm os p h er es c on t a in in g a c e ta ld e h yd e, c yc l o -p r op a ne , d i et h yl e t he r , e th y le ne , i s op r en e ,U D M H 1 , I - d i m e t h y l h y d r a z i n e

L i gu i d h y dr o ca r bo n s h av in g a f la sh p a in ! ; h et we e n55 a n d 100' C

C . l . L i q u i d s a t a t e m p e r a t u r e e q u a l o r a b o v et h e i r f l a s h p o i n t

C . 2 . L i q u i d s a t a t e m p e r a t u r e b e l o w t h e i r f l a s hp o i n t

;. - -

G r o u p 0

A tm os p h er es c on ta i n in g a ce to n e , a cr y l on it r i le ,a m mo n ia , b e nz e ne , b u ta n e, I -b ut an o l ( b ut y la l co h ol ) , 2 -b ut a no l ( se c on d ar y b ut yl a lc on o l } ,n -b ut y a ce t at e , i so bu t yl a c et a te , e th an e ,e t h a n o l ( e t h y l a l c o h o l ) , e t h y l a c e t a t ~ ,e t h yl e n e d i c hl or i d e, g as ol i n e, h ep t a ne > ,h e xa n es , m e th a ne ( n at u ra l g as ) , m et h an o l( me t h yl a lc oh o l ), 3 -m et h y l- l - bu ta n o l ( i s oa my la l c o h o l ) , m e t h y l e t h y l k e t o n e , m e t h y l i s o b u t y lk et on e . 2 -m e t hy l- I - pr op a n ol ( i s ob ut y l a l c ch o l ) ,2 -m et h y l- 2- p r op a n ol ( t e rt ia r y b ut y l al c o ho l l,p e tr o le u m n a ph t a, o ct an e s, p e nt a ne s , I -p en ta n ol( am yl a l c oh o l l , p ro pa n e, I -p ro p an o l ( pr o py la lc oh o l ), 2 -p r o pa n o l ( is op r o py l a l c oh o l ),p ro py l en e , s ty r en e , t o lu e ne , v in y l a ce t at e,

v i ny l c h lo r id e , x y l e ne s

C a t e g o r y 0

L i q U i d h y d r o c a r b o n s h a v i n g a f l a s h p o i n t l O O · C

0 . 1 . L i q u i d s a t a t e m p e r a t u r e e q u a l o r a b o v et h e i r f l a s h p o i n t

0 . 2 . L i q u i d s a t a t e m p e r a t u r e b e l o w t h e i r f l a s hp o i n t

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SA F - G 12 F I E L D O P E R A T I N G H A N D B O O K - V O L . I I

W E L L -T E S T IN GN o vem be r 1 98 4

. T h e a r e a a r o u n d a W e l l H e a d i s a C l a s s I D i v i s i o n 2 ( o r t y p e 2 z o n e ) w i t h i n a r a d i u s o f :

1 5 m ( 4 5 f t ) o n - s h o r e

1 0 m ( 3 0 f t ) o f f - s ho r e

C A U T I O N : t h e s a m e a r ~ a b e c o m e s a C l a s s I D i v i s i o n l i a r t y p e 1 z o n e i n c a s e o f a n e r u p t i v e w e l l a n di n c a s e o f i n t e r v e n t i o n o f a s e r v i c e u n i t o n t h e W e l l H e a d ~

. T h e a r e a a r o u n d a S e p a r a t o r i s a C l a s s I D i v i s i o n 2 ( o r t y p e 2 z o n e ) w i t h i n a r a d i u s o f :

10 m (30 f t ) o n - s h o r e

3 m (10 f t l o f f - s ho r e

C A U T I O N : t h e a r e a a r o u n d t h e r u p t u r e d i s c p i p e i s a C l a s s I D i v i s i o n 1 ( o r t y p e 1 z o n e ) w i t h i n a

r a d i u s o f 5 m (1 5 f t l a n d a C l a s s I D i v i s i o n 2 ( o r t y p e 2 z o n e ) w i t h i n a r a d i u s o f 10 m(30 f t l.

T h e a r e a a r o u n d a G a u g e Tank i s a C l a s s I D i v i s i o n 1 ( or t yp e 1 z o n e ) w i t h i n a r a d i u s o f :

1 5 m ( 4 5 f t ) o n - s h o r e

1 5 m ( 4 5 f t ) o f f - s h o r e

I n b o t h c a s e s , t h e r e i s a C l a s s I D i v i s i o n 1 ( or t yp e 1 z o n e ) 3 m (15 f t l a b o v e t h e r o o f .

T h e o u t l e t s o f F l a r e s , S a f e t y V a l v e s , V e n t s . . . e t c . a r e c l a s s i f i e d as C l a s s I D i v i s i o n 1 ( or t yp e 1z o n e ) w i t h i n a r a d i u s o f 5 m ( 1 5 f t l a n d a s C l a s s I D i v i s i o n 2 ( or t yp e 2 z o n e ) w i t h i n a r a d i u s o f10 m (30 f t ) .

G a s f i r e d h e a t e r s s h a l l n e v e r b e i n s t a l l e d i n c J a s s i f i e d a r e a s .

O p e n f i r e s s h a l l n e v e r b e u s e d i n c l a s s i f i e d a r e a s . A r e c o n s i d e r e d a s " o p e n f i r e s " a l l s y s t e m s p r o -d u c i n g o r a b l e t o p r o d u c e f l a m e s o r s p a r k s i n o p e n a i r o r h a v i n g s u r f a c e s s u s c e p t i b l e t o r a i s e a th i g h t e m p e r a t u r e , e s p e c i a l l y :

- o v e n , b o i l e r s , f l a r e s ,

- h e a t i n g o r l i g h t i n g s y s t e m s ,

- w el di ng p la nt s,

t h e r m i c e n g i n e s e x c e p t t h e o n e l i s t e d h e r e a f t e r , -

n o n i n t r i n s i c a l l y s a f e e l e c t r i c d e v i c e s o r l i n e s , o r e l e c t r i c m a t e r i a l s n o t i n c o n f o r m i t y w i t h' th e " e x p l os i v e e n v ir o n me nt " t yp e . . . e t c , ,

l i v i n g q u a r t e r s w h e r e t h e r e a r e o v e n s o r p e r m i s s i o n t o s m o k e .

G a s o l i n e e n g i n e a r e n o t a l l o w e d i n c l a s s i f i e d z o n e s .

D i e s e l e n g i n e s a r e a l l o w e d i n c l a s s i f i e d a r e a i f t h e y a r e f i t t e d w i t n a u t o m a t i c s h u t - d o w n d e v i c e sa c t i n g o n t h e i n t a k e a n d e x h a u s t ( o v e r s p e e d i n g l , s p a r k a r r e s t o r s , e x h a u s t p i p e o r i f i c e s o u t o fz o n e 1 , i n e r t i a s t a r t e r s o r s p e c i a l e l e c t r i c s t a r t e r s .

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Page 9: SLB FIELD HANDBOOK 1984

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F I E L D O P E R A T I N G H A N D B O O K · V O L . I I

W E L L T E S T IN G N o vem be r 1 98 4

SA F · G 13

O N S H O R E

Heate r

HEATERS AND /O R STEAMEXCHANGERS M UST BE LA ID

O UTS ID E O F C LAS SIF IED AR EA S.

T Y P E 1

T Y P E 2

Heater

HEATER S AND /OR STEAM

EXCH ANGERS MUST BE LA ID

O UTS ID E O F C LA SS IF IEO A REAS .

W ell H ead

3 m (1 0ft)above roof

o f t h e t a n k

10m

5 m (15 ft)

S A F E T Y S T A N D A R D S , -I

3m ( lO fdabove roof

, I

Page 10: SLB FIELD HANDBOOK 1984

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F I E L D O P E R A T I N G H A N D B O O K · V O l. I I

W E L L T E S T IN G

S AF · G 14

N o v embe r 1 98 4

e 2- R ec om men ded p ra c t is e s

R e m a r k s :

- T h e S e p a r a t o r s h o u l d i n a l l c a s e s p r e f e r a b l y b e l o c a t e d 2 5 m a w a y f r o m t h e W e l l H e a d ( 7 5 f t l .

- O f f - s h o r e , t h i s d i s t a n c e m a y b e r e d u c e d t o 1 3 m ( 4 0 ft). T he s ep ar at or i ns tr um en t c on t ro ls s ho ul db e s u p p l i e d w i t h c o m p r e s s e d a i r o r n i t r o g e n .

T h e r u p t u r e d i s c m u s t b e c o n n e c t e d t o a s p e c i a l l i n e , a t l e a s t 4 " I D l a n d e d j u s t o v e r t h e s e e l e v e la n d h a v i n g e l b o w s w i t h a m i n i m u m r a d i u s o f 6 0 c m ( 2 f t l .

- T a n k s a r e e q u i p p e d w i t h a F l a m e A r r e s t o r . T h e S n i f f e r P i p e m u s t b e c o n n e c t e d t o t h e R i g F l a r e .M o r e o v e r , M a n - H o l e C o v e r s h o u l d b e b o l t e d d u r i n g o p e r a t i o n .

- I n s o m e i n s t a n c e s , d u e t o l a c k o f s p a c e , a l l t h e r e c o m m e n d e d d i s t a n c e s c a n n o t b e r e s p e c t e d , b u t :

E q u i p m e n t m u s t n e v e r b e i n s t a l l e d i n t h e c l a s s i f i e d z o n e o f t h e W e l l H e a d ( t y p e 2 z o n e ) .

F i r e d H e a t e r s , B u r n e r s a n d W i r e L i n e W i n c h e s m u s t n e v e r b e i n s t a l l e d i n c l a s s i f i e d z o n e s .F L O P E T R O L C h i e f O p e r a t o r s h o u l d i n f o r m t h e c l i e n t a b o u t a n y p r o b l e m a n d m e n t i o n i t i n h i s r e p o r t .

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F I E L D O P E R A T I N G H A N D B O O K - V O L . I I

W E L L T E S T IN G

SAF - G 15

N o vembe r 1 9 84

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O N S H O R E

a: 3 0m /90 ft (m in .15m /45ft).

b : 3 0m /90 ft

c : 25m /75 ft

e . 3 0m /90 ft (m in.l0m /3 0 ft)

e : 3 0m /90 ft [m in .ttl m /3 0 ft)

f:25m/75ft

W ell H ead

c

R E C O M M E N D E D P R A C T IC E S

O F F S H O R E

A: 10m/30f t

B : 25m /75ft

c: 15m /45 ft

D: 3m /10 ft

E: 15 m / 45 ft

F : 13m/40f t