Benefits � Allowed liner to be deployed across an extended horizontal hole section with relatively short vertical section

� Saved considerable rig time for the customer

� Significantly reduced torque and drag forces that were generated from weight of tubulars in horizontal hole sections

Well background and challenges � These wells were drilled from the beach and required extreme extended-reach and horizontal drilling to explore up to 7.0 miles offshore

� Tremendous amounts of torque and drag were anticipated if openhole well would have been completed conventionally

� Vertical hole sections were not deep enough to create enough drillstring weight to push liner to total depth had drill pipe not been filled with mud

Baker Hughes solution and results � Suggested float-in “mud over air” liner system

� Used Solid ST landing sub to trap air in liner while allowing drillstring to be filled with mud to aid in liner deployment

� All liner equipment performed flawlessly and over 18,500.0 ft (5638.9 m) of 95/8-in. liner reached total depth as planned

Baker Hughes successfully installed two liner hanger assemblies and an upper completion in Russia’s longest extended-reach well for a major operator.

The well, drilled on Russia’s Sakhalin Island, reached a total measured depth of 7.7 miles (12343.7 m). Due to lack of available weight and the high-angle 121/4-in. hole section, the 95/8-in. Flex-Lock-III™ liner hanger and ZXP™ liner top packer were floated in the hole using a Solid ST landing sub keeping the drillstring full of drilling fluid. The 7-in. production and upper completion included, but was not limited to, a Flex-Lock-III liner hanger and HRD™ liner setting sleeve.

During this 21-month project, Baker Hughes successfully installed 18 liner hangers, 8 completions, and 1 intelligent production system. This extended-reach liner system enabled the 95/8-in. casing to be successfully run in all of the wells. This system’s design allowed long liners to be deployed across extreme extended-reach hole sections, and the seamless liner installation saved substantial rig time.

Pump down plugs

Lift nipple

Packer dog sub

ZXP™ liner packer

Flex-Lock™ liner hanger

Landing collar

Float collar

Float shoe

HRD-E™ tool

Slick stinger

RS packoff

Ported crossover

PBR packoff

ST landing sub

LFC adapter

LFC plugs

ST landing sub(solid ball seat)

© 2011 Baker Hughes Incorporated. All rights reserved. 31937

www.bakerhughes.comDisclaimer of Liability: This information is provided for general information purposes only and is believed to be accurate as of the date hereof; however, Baker Hughes Incorporated and its affiliates do not make any warranties or representations of any kind regarding the information and disclaim all express and implied warranties or representations to the fullest extent permissible by law, including those of merchantability, fitness for a particular purpose or use, title, non-infringement, accuracy, correctness or completeness of the information provided herein. All information is furnished “as is” and without any license to distribute. The user agrees to assume all liabilities related to the use of or reliance on such information. BAKER HUGHES INCORPORATED AND ITS AFFILIATES SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, PUNITIVE, EXEMPLARY OR CONSEQUENTIAL DAMAGES FROM ANY CAUSE WHATSOEVER INCLUDING BUT NOT LIMITED TO ITS NEGLIGENCE.

C a s e H i s t o r y

Flex-Lock/ZXP Liner System Used to Complete the World’s Longest Extended-Reach WellBaker Hughes installed over 18,500.0 ft of 95/8-in. liner