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Liner-Conveyed Gravel Pack System

Runningthe LCGPSystem

To run the LCGP system, the wellbore should first be

conditioned to clean out drill cuttings. All workstrings,

liner, screens, and washpipe to be used should also be

fully cleaned and drifted. With a properly conditioned

hole, the lower sandface and cementing liner completion

assembly can be picked up, which includes the: gravel

pack flow subassembly, isolation packer, and

appropriately centralized liner assembly with cementing

sleeves. This assembly is hung off on the liner. The

washpipe is then run with the sand control service tool to

run and be spaced out inside screen and liner assembly.

The upper liner packer is picked up, attached to the

service tool string and liner and run into the well. Once

on depth the setting ball is dropped to set the upper

liner top Versa-Trieve packer, release from the packerand test.

The service tool is then moved into a position to set the

liner isolation packers. The tool is positioned to displace

the open hole and condition it for gravel packing

operations. The tool is moved into a circulate position

for pumping the gravel pack and then to a reverse

position to reverse out excess slurry.

At this point the service tool can be pulled out if

Swellpacker isolation systems are used to isolate the

open hole, or cementing operations can begin by

opening the upper MCS closing sleeve and cementing

sleeve, followed by locating the service tool with weight

down in the cementing position. The cement is

displaced down the workstring and up across the liner

and is then reversed out of the service tool by picking up

and moving to the cement reverse position. The

cementing sleeve provides isolation to backflow of

cement during reverse-out operations.

The service tool is retrieved and the fluid loss control

valve is closed to shut off the gravel-packed zone. Thewell is conditioned and final clean up operations are

performed to prepare the well for the upper completion

equipment and final completion operations.

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HALLIBURTON

Liner-ConveyedGravel PackSystemPackers

Multipleopenholepacker optionsareavailable

for theLCGPsystem. Twopacker optionsare

availablefor the topliner packer,and three

packer optionsare availableto isolatethe liner

fromthe gravelpack assembly. Thetype of

openholepacker usedwill bedetermined by

thecompletion design.

Topof liner packer optionsincludethe large

boreVersa-TrieveVGH packer for moderate

wellborepressuresor theVersa-TrieveVCH

packer for higher pressureapplications.

Availablescreen liner isolation packersinclude

multipleSwellpacker isolation system optionsaswell asopenhole packers. Inflatable packers

may alsobe used. Dependingupon the

application,a combination of oneor more of

theisolation packer typesmay be usedto

provideboth immediate andlong-term

pressureintegrity.

HAL33024

Openhole

Preparingthe Wellbore

Sandcontroloperations begin in thedrilling

phasewhen thelong stringproduction casing

or production liner isset. Successful

preparation of thecasing ID,liner top,and

drilling/completion fluidincludescleanout

anddisplacement runsto removedebris,

conditioningthewellbore fluid,andensuring

casedhole drift. Thesuccessof subsequent

completion runsisdependent upon these

initialsteps.

CleanWellte chnology successfully addresses

wellprofilesand applicationsby providing

robust cleanout stringdesigns,component

security andtool designsto addressrig

limitations. Thewell profilewill dictatethe

mechanicaltoolsrequiredfor applications/

situationssuch asextendedreach,high angle,

rigpumping limitationsandexistence of large

annulusapplications. Detailedcleanout

proceduresandtool designsthat addressfluid

hydraulics,drift restoration,and where

applicable,mechanicalextraction areall part

of ensuringa debris-freewellboreready for the

wellcompletion.

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Run a Liner andConveya Gravel PackCompletionin a SingleTrip

The larger OD/ID screen across the sandface enables the use

of larger gravel packing tools and larger screens to increase

the open flow areas and reduce the pressure drop across the

reservoir. This optimizes production and minimizes erosion.

In some applications,use of the LCGP may enable the

reduction of a casing size in the well design.

Maximizes system production flow bore

Eliminates a liner run and associated,clean out, and

liner testing time

Saves drilling fluid and conditioning time

Openhole gravel pack or stand-alone screen completion

in fewer trips

Liner isolation provided by external casing packers (ECP),

Swellpacker systems and/or with cementA liner disconnect can be incorporated to remove portions

of the liner when completing multilateral completions.

Once activated,the liner packer and part of the liner can be

removed from the lower assembly leaving the top of the liner

below the lateral junction. The multilateral junction can be

reconnected,if needed, when tripping upper completion

equipment.

Thesolutionto enhancingproduction

sandface completion

CompletionChallenge

Wellbores requiring multiple casing liners to

depth can be an issue. Installing the largest sa

completion assembly across the sandface, tha

restrict well flow is optimum.

As drilling and completion costs continue to i

efficient methods to drill and complete new w

sidetrack existing wells are required to decreas

enhance production. Existing drilling practice

multiple drilling liners to reach well depth. W

addition of each liner,the casing size or openh

ultimately adjacent to the producing interval i

Completions requiring sand control may not

but in a sand control completion a screen asse

to be placed either inside the casing or in the o

further reducing the sandface system ID. The

restricted wellbore that can restrain well produ

induce a more complex casing design.

Liner-Conveyed Gravel Pack System

TheLiner-ConveyedGravel Pack(LCGP)system provides a

single-trip combination casing liner and screen assembly

with the capability to place a sand control completion across

the sandface and cement the liner above. Since the liner is

combined with the screen into a single completion assembly,

the screen does not have to pass through the liner,enabling

the larger basepipe screen to be placed across the sandface.

TheversatileLCGP systemcan beconfiguredto the

particularwelldesign andis ideallysuitedfor:

Sidetrack completions in existing wellbores

Slimhole primary completions

Isolating nonproductive sections of a zone

Multilateral wells requiring sand control