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"Every well needs one"SPE Aberdeen 4th European Well Abandonment Seminar
© 2012 BAKER HUGHES INCORPORATED. ALL RIGHTS RESERVED. TERMS AND CONDITIONS OF USE: BY ACCEPTING THIS DOCUMENT, THE RECIPIENT AGREES THAT THE DOCUMENT TOGETHER WITH ALL INFORMATION INCLUDED THEREIN IS THE CONFIDENTIAL AND PROPRIETARY PROPERTY OF BAKER HUGHES INCORPORATED AND INCLUDES VALUABLE TRADE SECRETS AND/OR PROPRIETARY INFORMATION OF BAKER HUGHES (COLLECTIVELY "INFORMATION"). BAKER HUGHES RETAINS ALL RIGHTS UNDER COPYRIGHT LAWS AND TRADE SECRET LAWS OF THE UNITED STATES OF AMERICA AND OTHER COUNTRIES. THE RECIPIENT FURTHER AGREES THAT THE DOCUMENT MAY NOT BE DISTRIBUTED, TRANSMITTED, COPIED OR REPRODUCED IN WHOLE OR IN PART BY ANY MEANS, ELECTRONIC, MECHANICAL, OR OTHERWISE, WITHOUT THE EXPRESS PRIOR WRITTEN CONSENT OF BAKER HUGHES, AND MAY NOT BE USED DIRECTLY OR INDIRECTLY IN ANY WAY DETRIMENTAL TO BAKER HUGHES’ INTEREST.
Version 2.0
Ole Petter Nipen – Baker Hughes
Agenda
� Introduction to TOGI Subsea P&A project
�Scope of work
�P&A operation Step by Step
�Big Fishing �Big Fishing
2 © 2013 Baker Hughes Incorporated. All Rights Reserved.
TOGI P&A Project
� 6 slot wellhead structure,
5 wells drilled in 1990
� All ROV operated
� 300 m water depth
� Closed in down since 2002
© 2013 Baker Hughes Incorporated. All Rights Reserved. 3
Scope of work
Batch P&A of 5 wells:
� Pull completion
� Log 9 5/8” casing
� Place 1st barrier
� Cut & Pull 9 5/8” Casing
� Place 2nd barrier
© 2013 Baker Hughes Incorporated. All Rights Reserved. 4
� Cut & Pull 13 3/8” casing
� Surface plug
� Remove wellhead, 30” and
42” casing
Contingency:
� Mill seal assembly
� Section mill 9 5/8” & 13 3/8”
� Casing mill 9 5/8”
� Cut & Pull 9 5/8” in one run
Pull Completion
Operational steps
� Pull tubing with THRT
� Tubing pulled down to PBR
© 2013 Baker Hughes Incorporated. All Rights Reserved. 5
9 5/8” X 10 ¾” section
� Log 9 5/8” X 10 ¾” Casing
� Place 1st Barrier Plug
� Cut 10 ¾” Casing Below Hanger
© 2013 Baker Hughes Incorporated. All Rights Reserved. 6
� Pull 10 ¾” Seal Assembly
� Remove 10 ¾” X 9 5/8” Casing
Remove 10 ¾” seal assembly
© 2013 Baker Hughes Incorporated. All Rights Reserved. 8
10 ¾” Seal Assembly and casing hanger
Mill 7 Seal Assembly
Remove 10 ¾” x 9 5/8” casing
� Cut & Pull in same run
� Cut in tension
� Pull up to max overpull prior to cut
� Pre-defined section cutted
© 2013 Baker Hughes Incorporated. All Rights Reserved. 9
� Saved eight run
Casing Mill
� Mill 58 meter of 9 5/8” Casing
� ROP was limited by swarf handling
� Small swarf
Define max ROP upfront!
© 2013 Baker Hughes Incorporated. All Rights Reserved. 10
Define max ROP upfront!
55
Contingency
� Contingency on all wells
� 9 5/8” & 13 3/8”
© 2013 Baker Hughes Incorporated. All Rights Reserved. 11
13 3/8” section
� Log 13 3/8” Casing
� Place 2nd Barrier Plug
� Pull 13 3/8” Seal Assembly
© 2013 Baker Hughes Incorporated. All Rights Reserved. 12
� Remove 13 3/8” Casing
18 5/8” section
� Set 18 5/8” Mechanical Plug
� Place Surface Cement Plug
� Cut & Pull 18 5/8”
© 2013 Baker Hughes Incorporated. All Rights Reserved. 13
� Cut & Pull 30”
� Cut & Pull 42”
Big Fishing
1. Remove 18 5/8” wellhead (Blue)
2. Remove 30” Conductor (Red)
3. Remove 42” Washout sleeve (Green)
Shear at 136 ton
© 2013 Baker Hughes Incorporated. All Rights Reserved. 14
Cut & Pull 18 5/8” Wellhead
D-spear
� Two Trip Solutions
� Dressed to catch ID:18,000"-19,162"
© 2013 Baker Hughes Incorporated. All Rights Reserved. 15
D-spear Wellhead
Pull 30” Conductor
© 2013 Baker Hughes Incorporated. All Rights Reserved. 17
����
E-spear
20 ¾” D-spear
Cement?
� Cement above 42” hanger and inside template housing!
© 2013 Baker Hughes Incorporated. All Rights Reserved. 18
45 ½” Cement MillCement outside of 30”
Cut 42”
© 2013 Baker Hughes Incorporated. All Rights Reserved. 19
MS-Cutter with Stabilizer 42” Conductor cut
Pull 42”
Remove 42” Washout sleeve (green)
� Catch 38,5”
© 2013 Baker Hughes Incorporated. All Rights Reserved. 20
Modified E-Spear
Stack-Up Test
42” Conductor on Deck
TOGI P&A Project – Sum up
Operational time: 1208.4 hrs
Downtime: 4.5 hrs
Operational factor: 99.62%
Mill 9 5/8” & 13 3/8” Seal Assembly: 7 seal assy milled
Cut operation of 9 5/8”, 10 ¾” & 13 3/8”: 16 run
© 2013 Baker Hughes Incorporated. All Rights Reserved. 22
Cut operation of 9 5/8”, 10 ¾” & 13 3/8”: 16 run
Cut & pull operation with Spear, and motor: 8 run!
Pulling & Cutting operation: 25 run
9 5/8” casing milled: 58 meter
TOGI P&A Project – Sum up
� Robust fishing package offshore
� Standardise BHA`s
� Milling Seal Assembly
� Back-up equipment for Big Fishing Tools
� Personnelo Planning and follow up operation
o Operators offshore
© 2013 Baker Hughes Incorporated. All Rights Reserved. 23
Operational factor: 99.62%