IWCF WI - 5 - Snubbing

WELL INTERVENTION CERTIFICATION COURSE

SNUBBING

1

SNUBBING Snubbin: “Process of tripping pipe into well under pressure – Snubbin: “Process  pipe light mode”  Strippin: “Moving pipe through through rubber rubber element to contain contain well  pressure” ADVANTAGE ADVANT AGE OVER CT:

APPLICATION: • Sand Was!in • Well "nloadin • Was!in Per#orations • Acidisin • Ce$entin • Drillin or %illin • Fis!in • &lo' Control IWCF Well Intervention Accreditation Course

•

•

S$all vertical #ootprint (i! drillin)$illin drillin)$illin  rotation tor*ue

•

(i! pressure + , psi

•

(ori.ontal 'ell

/

SNUBBING Snubbin: “Process of tripping pipe into well under pressure – Snubbin: “Process  pipe light mode”  Strippin: “Moving pipe through through rubber rubber element to contain contain well  pressure” ADVANTAGE ADVANT AGE OVER CT:

APPLICATION: • Sand Was!in • Well "nloadin • Was!in Per#orations • Acidisin • Ce$entin • Drillin or %illin • Fis!in • &lo' Control IWCF Well Intervention Accreditation Course

•

•

S$all vertical #ootprint (i! drillin)$illin drillin)$illin  rotation tor*ue

•

(i! pressure + , psi

•

(ori.ontal 'ell

/

SNUBBING EQUIPMENT

4 6

1

(draulic 2a 2ac As Asse$bl

/

3uide 4ube

5

Access Windo'

6

4rave veli lin n Sli lip ps) s)Sn Snu ubb bbe ers

11. Hos Hoses es 12. Equalizing Loop

2

13. Bleed-Off Line

7

14. Strippers Stati tio onar Sli Slip ps)Snubbers 15. ir!u ir!ulatin lating g S" S"ste# ste# Wor &aset

8

Po'er S' S'ivel)4ons

9

Control Panel

,

1

5

3 14

13



Po'er Pac

12

10 &;P Sste$ 10

IWCF Well Intervention Accreditation Course

5

Hd!"uli# $"#%  An asse$bl o# !draulic clinders < slip bo'ls '!ic! enables t!e pipe to to be $oved in or out o# t!e 'ell Situated at t!e top o# t!e &;P stac= ;n t!e top o# t!e clinders is t!e travelin !ead '!ic! carries travelin slip & $eans o# valves= t!e !draulic circuits can be set up to provide di>erent speeds < !ence po'ers #or t!e travelin !ead  4!e stroe stroe o# a ?ac depends depends on t!e $ae= but $ost !ave a 10 #t 'orin stroe Guide Tube It restrain t!e pipe and stop it bein bucled out o# t!e side Spline Tube is Intervention used to Accreditation trans$it tor*ue-reaction IWCFIt Well Course

6

ACCESS WINDOW •

It is a lare < !eavil constructed asse$bl= '!ic! basicall consists out o# / base-plates < 6 steel les spacin t!e$ apart 4!e asse$bl is rated to #ull load capacit o# t!e unit

•  4!e 'indo' is used to enable lare ;D ite$s o# &(A or co$pletions= etc= to be installed < run= 'it!out !avin to pass t!e$ t!rou! restricted ID slip < bo'ls 4!is 'ill eli$inated usin oversi.ed= lare ;D= e*uip$ent above t!e 'indo' •

Windo's are usuall tted 'it! tubinuides to prevent buclin '!ile snubbin

•

Since t!e 'orin space is restricted= preplannin is re*uired to select t!e re*uired di$ension o# t!e 'indo'-asse$bl

IWCF Well Intervention Accreditation Course

,

SLIPS & SNUBBERS •  4ravelin slips are $ounted onto rotar table !ead < co$$onl consist o# one bo'l #or pipe !eav < one bo'l #or pipe li!t '!en in snubbin $ode • Al$ost al'as !draulicall operated= t!e t'o bo'ls are t!e sa$e 'it! t!e pipe li!t bo'l #acin do'n • Si$ilarl= t!e stationar slips are $ounted in t!e 'or 'indo'= at t!e botto$ o# t!e ?ac= but do not $ove • In !i! pressure 'ells= it is nor$al to use an eBtra set o# stationar snubbers #or sa#et

IWCF Well Intervention Accreditation Course

7

SNUBBING STRIPPERS  4!e stripper asse$bl is a special device '!ic! is used #or t!e #ollo'in: • • •

Pri$ar barrier 'it! lo' 'ell!ead pressure 'or Pipe cleanin on pullin out Prevents droppin o# debris do'n t!e 'ellbore '!ilst trippin

Stripper bo'ls are available 'it! bot! sinle ele$ents < dual ele$ents Strippers ele$ent can be redressed durin operation Wear on t!e ele$ent is a>ected b: • • •

Well!ead pressure ubrication at t!e rubber EBternal pipe rou!ness

•

In dual ele$ent stripper= pressure e*ual to !al# t!e 'ell!ead pressure is ept bet'een t!e rubbers b a s$all pu$p < reservoir 4!is is to !alve t!e pressure on eac! rubber < t!us eep 'it!in its 'orin rane •  4!e sinle ele$ent stripper bo'l is e>ectivel !al# o# a dual stripper bo'l

IWCF Well Intervention Accreditation Course

8

SNUBBING PROCESS

IWCF Well Intervention Accreditation Course

9

SNUBBING PROCESS

IWCF Well Intervention Accreditation Course



SNUBBING PROCESS

IWCF Well Intervention Accreditation Course

10

SNUBBING PROCESS

IWCF Well Intervention Accreditation Course

11

SNUBBING FORCE 500

8”

) 1(

0 0 0,

7” 400 4”

S B L

300

E C R

200

,

O F G NI B B U N S

3” 100 2!” 50

0

2"”

1

2

3

4

5

IWCF Well Intervention Accreditation Course WELLHEAD

6

7

8

#

10

11

PRESSURE, PSI (1,000)

12

13

14

15 1/

ANNULAR BOP •  4!e annular &;P is identical to a standard annular batpe &;P used in drillin operations alt!ou! nor$all o# a s$aller si.e 4!e pressure ratin is specied accordin to t!e 'ell!ead pressure •  4!e annular &;P is used '!en t!e nor$al ra$-tpe &;Ps cannot seal around so$et!in due to its enlared si.e= suc! as a side pocet $andrel= blast ?oint= slip ?oint= etc •

W!en used #or snubbin operations= its nor$al practice to !ave a s$all= 1 allon= accu$ulator bottle in t!e closin line !draulic circuit= situated close to t!e preventer 4!is allo's t!e set-up o# t!e tools to be stripped t!rou! '!ilst $aintainin a stead !draulic closin pressure

IWCF Well Intervention Accreditation Course

15

ANNULAR BOP

IWCF Well Intervention Accreditation Course

16

RAM T'PE BOP 1

Strippin &;P Stripping BO$ is a standard ra#-t"pe BO$ used in drilling % &or'o(er operations &it) spe!ial ele#ents* a#eron* to ena+le t)e# to seal on #o(ing,stripping pipe.

/

Sa#et PipeG Ra$ ort)e &lind >  -/ (C/)

F: O* -*-;/ C+@ R-. (O)

IWCF Well Intervention Accreditation Course

18

$/ &+

U* S+** R-. (C/)

E-/ -/ (C/)

B/ O>>  -/ (O)

F: O* -*-;/ C+@ R-. (O)

IWCF Well Intervention Accreditation Course

19

U* S+** R-. (O) E-/ -/ (C/)

B/ O>>  -/ (O)

F: O* -*-;/ C+@ R-. (O)

IWCF Well Intervention Accreditation Course

1

U* S+** R-. (C/) E-/ -/ (C/)

B/ O>>  -/ (O)

F: O* -*-;/ C+@ R-. (O)

IWCF Well Intervention Accreditation Course

//

U* S+** R-. (C/) E-/ -/ (O) B/ O>>  -/ (C/)

F: O* -*-;/ C+@ R-. (O)

IWCF Well Intervention Accreditation Course

/5

SHEAR & SEAL BOP •

Its ver o#ten !draulicall boosted &;P to enable t!e$ to cut 'orstrin etc < t!en seal o> t!e 'ell bore

•

Its placed i$$ediatel above t!e 'ell!ead but belo' an riser on o>s!ore installations #or so$e reulator bodies

•

W!ere separate blind < s!ear ra$s are used= t!e c!oice o# '!ic! to place belo' '!ic!= is o#ten dictated b 'ell conditions or operator pre#erence For $ost snubbin ?obs t!e s!ear is co$$onl placed belo' t!e blind since t!e pipe $a ver 'ell be trin to pus! out o# t!e 'ell bore at t!e ti$e it is re*uired to be cut

•

Conventional s!ear ra$s $a not al'as cut t!e 'or strin co$pletel #or eBa$ple i# it is re*uired to cut a &(A 'it! a s! insideG < it $a be necessar to RI( one or t'o  ?oints be#ore operatin nor$al s!ear ra$s in t!is case

IWCF Well Intervention Accreditation Course

/6

H'DRIL BOP Connector Ri ng #roo$es

Ram ssem!ly

Bonnet Bolts

Load Hinges

Manual Locking Scre"

Fluids Hinges

Fluid Connections and Hydraulic Passages Bonnet Bolts Piston Rod Mud Seal

Side Outlets for Choke Kill

Replace Cylinder Liner IWCF Well Intervention Accreditation Course

/,

SHAFFER SHEAR RAMS U* B/9=

U* R;;* 

U* H/*  IWCF Well Intervention Accreditation Course

L?* R;;*

L?* B/-

L?* B/9=

L?* H/*  /7

VARIABLE RAMS

IWCF Well Intervention Accreditation Course

/8

BLIND(SHEAR RAMS 1

Lo&er Bod" sse#+l"

2

Side $a!'er 

3

pper a# Bod"

4

pper a# sse#+l"

5

/op Seal

0

Blade $a!'er 

5

3

0 2

4

1

IWCF Well Intervention Accreditation Course

/9

SNUBBING BOP ARRANGEMENT 05=  WP O P S ONL OPERA$ING FEA$URES

U* S+** R-.

f S lea's E-/ L lose LS % S 6Double Barrier 7 L?* S+** R-.

B/ O>> 

•

f LS lea's lose Bot) S

$ P. L

S->+@ R-.

•

2 /ree (al(es #ust +e !losed &)en stripping BH* t)erefore spa!ing out to a!!o##odate BH is !ru!ial. 8E9E use S for stripping unless e#ergen!". 8o tertiar" +arrier s"ste#.

IWCF Well Intervention Accreditation Course

S->+@ R-.

C> 

$ P. L

S->+@ R-.

•

B/ R-.

2 /ree (al(es or !o#+ination of tree (al(es % C> 

E-/ L

OPERA$ING FEA$URES

L?* S+** R-.

f S lea's lose LS % S 6Double Barrier 7 •

f LS lea's lose Bot) S •

$ P. L

S->+@ R-. B/ R-.

C