4.0 Extreme Lean Profile, A Novel Approach

7/18/2019 4.0 Extreme Lean Profile, A Novel Approach

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ExtremeExtreme LeanLean ProfileProfileSystemSystem

Enhancing a succesfull idea.

The natural Lean Profile Evolution.

San Donato Milanese, September 7th 2006



Summary

• State of the art (Lean Profile)

• X-LP motivations and targets

• Project deliverables

• Prototype BETA testing and field

experience (Helm-1)

• Conclusions



Conventional Profile

1.50 inches (40 mm)

ProductionCasing

6-7 inches (170 mm)

Surface &

IntermediateCasing



1.50 inches (40 mm)

Surface

& IntermediateCasing

Production

Casing

Lean Profile



Lean Profile characteristics

• Precise control of the well verticality

• Improvement in formations’ drillability(also the hardest ones) – ROP increase

• Better management of wellbore stability

• Reduction in:

friction between the hole and the drillpipes,

casing wear, stuckpipe and volumes

• Generally: costs reduction



Extreme Lean ProfileExtreme Lean Profile

TARGETS

Extend the Lean Profile tecnique to the whole well profile

and to each type of well (HP/HT and “extended reach”

wells) with a considerable reduction of the risk

assessment due to the possibility of running in hole up

to 5 intermediate strings (e.g., running 4 casing strings

and keeping 1 spare for contingency).

Guarantee the use of the standard 7” OD casing asproduction casing and the possibility to re-enter a

previous well or to make a side track quite easily.



Lean Profile and Extreme Lean Profile

28” Hole 24”1/2 C.P.

22” Hole 18” 5/8 Csg.

17”1/2 Hole 16” Csg.

Hyd.521

14”3/4 Hole 13”3/8 Csg.

Grant Prideco STL flush

12” 1/4 Hole 9” 5/8 Csg.

8” 1/2 Hole 7” Liner

LEAN profileLEAN profile

22” Hole 18” 5/8 Csg.

TenarisOD 20”

17”1/2 Hole 16” Csg.TSC OD 16.405”

14”3/4 Hole 13”3/8 Csg.

GP ST L flush

8” 1/2 Hole 7” Liner

Extreme LEAN profileExtreme LEAN profile

12”1/4 x 12”7/8 Hole 11”3/4 liner.

NJO Coupl. OD 12”

10”5/8 Hole9”5/8 Csg

Flush connection.



Project deliverables

Standard 6 ¾” VTK7”8 ½”

New Steerable Stab,

8” VTK

9 5/8”10 5/8”

Underreaming11 ¾”12 7/8”

Standard 9.1/2” VTK13 3/8”14 ¾”

Standard 9.1/2” VTK16”17 ½”

VertiTrakCasingSize

BoreHole Size



VRS BETA testing



VRS BETA testing



VRS BETA testing



Extreme Lean ProfileExtreme Lean ProfileEgyptian testEgyptian test

The field trial has been performed in August 2006 in the

well Helm-1 and it involved the 3 prototypes of 12 7/8” VRS tools only (2 were paid by ENI, the third was built

by BHI for internal research purpose).

Second Test with the same 3 Prototype tools of Helm-1has been in progress at well Port Fouad Marine Deep 2

since the end of August 2006 (actual depth 3800 m).

The 10 5/8” Vertitrak prototype tools shall be tested on

PFMD 2 in a month (Helm-1 profile does not allow to

run the 10 5/8” Tools).



Helm-1

12” ¼ x 12” 7/8 Section

• Formation: mainly compacted shale

• Depth in: 3192m

• Depth out: 3665m

• Total drilled section: 473m

• Tools utilized: 2 (drilled half a section each

due to MWD failure during the first run)

• Survey @ 3636 m: 0.08°• Caliper Results: in Gauge (12 7/8” – 13”)



Helm 1 experience

Video clip



Conclusions

• The VRS worked very fine: the hole quality

demonstrates the good job did by this new

prototype at its first trial in the world - remember

that the VRS is still in its prototype phase!

• The survey demonstrates that the VRS worked like

a “normal” Vertitrak® (last survey: 0.08º

deviation from vertical) without interference withthe reaming system (last 250 meters: perfect

gauge of 12” 7/8).

• The cutters did a great job without wearing too

much: of course it is not possible to say if only one

set of cutters would have been sufficient to drill all

the 12" 7/8 phase.



QUESTION

TIME





36” Hole - 32” C.P.

28” Hole - 24” 1/2 Csg.

23” Hole - 18” 5/8 Csg.

17” 1/2 Hole - 13” 3/8 Csg.

12” 1/4” Hole - 9” 5/8 Csg.

8” 1/2 Hole - 7” Liner

28” Hole - 24”1/2 C.P.

22” Hole - 18” 5/8 Csg.

17”1/2 Hole - 16” Csg.Hyd.521

14”3/4 Hole - 13”3/8 Csg.

Grant Prideco ST-L flush

12” 1/4” Hole - 9” 5/8 Csg.

8” 1/2 Hole - 7” Liner

m

50

400

1200

1900

3261

3676

4790 T.D.

conventional profileconventional profile LEAN profileLEAN profile

LEAN Profile sketch



Well Sketches of Helm-1 and PFMD2

Helm-1

30” Csg @ 193mMD

13 3/8” Csg @ 3192mMD

11 ¾” Lnr @ 3665mMD

10 5/8” Lnr @ 3775mMD

10 3/4”-9 5/8”-8 5/8” Csg @4580mMD

7” Lnr @ 5311mMD

5 7/8” OH @ 5562mMD

16” Lnr @ 2078mMD

18 5/8” Csg @ 1293mMD

26”x36” Hole

24” Hole

14 ¾”x18 ¼” Hole

14 3/4” Hole

12 ¼”x12 7/8” Hole

10 5/8”x12 ¼” Hole

8 ½”x10 ¼” Hole

6 ½”x8 ¼” Hole

PFMD2

30” Csg @ 157mMD

13 3/8” Csg @ 3423mMD

11 ¾” Lnr @ 4036mMD

10 3/4”-9 5/8” Csg @ 4752mMD

7” Lnr @ 5252mMD

5 7/8” OH @ 5586mMD

16” Lnr @ 2738mMD

20” Csg @ 1126mMD

36” Hole

24” Hole

17 ½” Hole

14 3/4” Hole

12 ¼”x12 7/8” Hole

10 5/8”x12 1/4” Hole

8 1/2” Hole



Extreme Lean Profile

“Goals and Challenges”

• The Extreme Lean Profile concept is theapplication of the Lean Profile Technique over twoextra well sections.

• 11 ¾” and 9 5/8” Casing strings shall be runthrough 12 7/8” and 10 5/8” holes.

• New generation of Vertitrak tools should be

designed to make this available.



A Lean Profile allows to

drill a smaller hole forrunning the samecasing diameter, withrespect to theconventional approach.

Lean Profile Technology

The concept

17 1/217 1/2””Conventional HoleConventional Hole

Casing 13 3/8Casing 13 3/8””

14 3/414 3/4””(Lean)(Lean)



17 1/217 1/2””Conventional HoleConventional Hole


Lean Profile ConceptLean Profile Concept

~ 2 inch



• Difficult Control of Hole Verticality

• Low Fm. Drillability

• Circulation Losses

• Hole Instability

• Difficult Control of the Hole Verticality

• Low Fm. Drillability• Circulation Losses


• Pipe Friction

• Casing Wear

• Stuck pipe …

0

500

1000

1500

2000

2500

3000

3500

4000

4500

0 5 10

Inclination (deg)

M

D

( m )

MONTE ALPI 4X

MONTE ALPI NORD 1

MONTE ALPI OVEST 1

Major Drilling Problems solved by

Lean Profile System



• Difficult Control of Hole Verticality

• Low Fm. Drillability

• Circulation Losses


• Difficult Control of the Hole Verticality

• Low Fm. Drillability• Circulation Losses


• Pipe Friction

• Casing Wear

• Stuck pipe …

0

500

1000

1500

2000

2500

3000

3500

4000

4500

0 5 10

Inclination (deg)

M

D

( m )

MONTE ALPI 4X

MONTE ALPI NORD 1

MONTE ALPI OVEST 1

Major Drilling Problems solved by

Lean Profile System



836 m

Performance of Straight Drilling versus Rotary Drilling

1,080 m

1,500 m

1,340 m

ComparisonComparisonbetweenbetween“ “ C a l i p e r C a l i p e r ” ” readingsreadings

SDDSDD RotaryRotary

Control of Hole Verticality

(Section View)



X-LP motivations

• Less rock to drill

• Reduced casing volume

• Faster drilling

• Avoid second run for hole enlargement („Do it inone run“)

• New: Drill 12 7/8“ hole through a 13 3/8“ casing

• New: Run 11 ¾“ liner into a 12 7/8“ hole• Additional (11 ¾“) casing is needed depending onformation characteristics

• Continues concept of absolutely vertical hole

• Option: start with 22“ instead of 28"

• No changes in the wellhead equipment

• Summarizing: more safety and less money



14 1/214 1/2””/13/13 ½”½”Conventional HoleConventional Hole


12 7/812 7/8””(Lean)(Lean)Ø 1 1/8 inch

Extreme Lean Profile Concept forExtreme Lean Profile Concept for

1111 ¾”¾” Casing / 12 7/8Casing / 12 7/8”” HoleHole



1212 ¼”¼”Conventional HoleConventional Hole


10 5/810 5/8””(Lean)(Lean)Ø 1 inch

Extreme Lean Profile Concept forExtreme Lean Profile Concept for

9 5/89 5/8”” Casing / 10 5/8Casing / 10 5/8”” HoleHole



Extreme Lean ProfileExtreme Lean ProfileMajor project difficultiesMajor project difficulties

As shown in the previous two slides, the realization of the twoVertitrak tools for the additional sections of the Extreme LeanProfile crossed two completely different kind of Engineering

problems.

The Tool for the 12 7/8” hole / 11 ¾” Casing had to be designedtaking into consideration the maximum ID of a Standard 13 3/8”

Casing that is 12 ¼”. This limitation imposed the design of a Reamer to be integrated into the system.

The Tool for the 10 5/8” / 9 5/8” Casing had to be reduced interms of OD from the Standard 9 5/8” to an 8” Body. A new

Steering Head was designed as well.



Extreme Lean ProfileExtreme Lean ProfileUnderreamingUnderreaming areaarea

12 7/8” Final Hole Section

12 ¼” Bit

The Undereaming is just requiredfor 5/8” on the Diameter and 5/16”

on the Radius. The very small crown allows easyPad cutters design.



Helm 1 experience

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