04 Nipen Baker Hughes
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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
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Agenda
� Introduction to TOGI Subsea P&A project
�Scope of work
�P&A operation Step by Step
�Big Fishing �Big Fishing
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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
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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
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� 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
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Pull Completion
Operational steps
� Pull tubing with THRT
� Tubing pulled down to PBR
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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
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� Pull 10 ¾” Seal Assembly
� Remove 10 ¾” X 9 5/8” Casing
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Remove 10 ¾” seal assembly
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Remove 10 ¾” seal assembly
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10 ¾” Seal Assembly and casing hanger
Mill 7 Seal Assembly
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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
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� Saved eight run
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Casing Mill
� Mill 58 meter of 9 5/8” Casing
� ROP was limited by swarf handling
� Small swarf
Define max ROP upfront!
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Define max ROP upfront!
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Contingency
� Contingency on all wells
� 9 5/8” & 13 3/8”
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13 3/8” section
� Log 13 3/8” Casing
� Place 2nd Barrier Plug
� Pull 13 3/8” Seal Assembly
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� Remove 13 3/8” Casing
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18 5/8” section
� Set 18 5/8” Mechanical Plug
� Place Surface Cement Plug
� Cut & Pull 18 5/8”
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� Cut & Pull 30”
� Cut & Pull 42”
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Big Fishing
1. Remove 18 5/8” wellhead (Blue)
2. Remove 30” Conductor (Red)
3. Remove 42” Washout sleeve (Green)
Shear at 136 ton
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Cut & Pull 18 5/8” Wellhead
D-spear
� Two Trip Solutions
� Dressed to catch ID:18,000"-19,162"
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D-spear Wellhead
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Cut 30”
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Pull 30” Conductor
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����
E-spear
20 ¾” D-spear
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Cement?
� Cement above 42” hanger and inside template housing!
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45 ½” Cement MillCement outside of 30”
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Cut 42”
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MS-Cutter with Stabilizer 42” Conductor cut
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Pull 42”
Remove 42” Washout sleeve (green)
� Catch 38,5”
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Modified E-Spear
Stack-Up Test
42” Conductor on Deck
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Big Fishing
Movie
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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
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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
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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
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Operational factor: 99.62%
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Questions?
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