7/21/2019 AllPac and AllFrac Sand Control Screens With Alternate Path Technology

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APPLICATIONS

Cased hole gravel-pack and frac-pack

operations

Vertical and deviated wells

Long intervals

Heterogeneous formations

Cased hole, multizone gravel pack

operations

BENEFITS

Ensures complete annular packing for

well longevity and productivity

Permits continued fracture development

past bridge, ensuring stimulation and

productivity across the interval

Enables multizone completions for

more efficient operations, saving time

and costs

FEATURES

Bypasses sand bridges around the

screen during pumping operations

Is compatible with all filter media,

including wire-wrapped and premiummesh screens

Can be configured to meet gravel- or

frac-packing requirements by adjusting

the number and size of tubes

Aligns tubes automatically (optional

feature) while connection is being made

Has unique connector design for ease

of deployment

Effective, complete gravel placement is critical to preventing

formation sand production and completion failure. By providing a

redundant mechanism to place a gravel pack around the screens

inside the wellbore, Alternate Path sand-control screens offer a

rugged and flexible technology for sand-control treatment design.

Alternate Path screens can

lower the risk of gravel-pack failure

minimize rig time spent on sand-control pumping operations

increase wellbore operational reliability

increase completion longevity

maximize production and reserve recovery

provide economical solutions for completing multiple intervals.

Standard sand control screens are the mechanical filter in sand

control completions that prevent gravel from entering the tubing

with the produced oil and gas.

With standard screens, gravel-pack and STIMPAC* frac-pack

operations would prematurely end when a bridge forms. A bridge

can form where there is a large amount of leakoff from the

wellbore, either to the screen or to the formation. Alternate Path

technology uses shunt tubes to provide alternate slurry pathways

that bypass the bridge. As soon as the bridge forms, the slurry

flows through the tubes to any void below or past the bridge,allowing the sand control treatment to continue to its normal

conclusion of 100% packing efficiency. Without this complete

pack, screens will fail quickly.

AllPAC screen

The AllPACscreen is used in gravel-pack completions or in frac-

pack applications for which it is necessary to complete the pack

after a bridge is formed. This screen features one or more

1.000-in 0.500-in [25.4-mm 12.7-mm] shunt tubes that are

attached either concentrically or eccentrically to the screen joint

with 0.250-in [6.4-mm] exit nozzles spaced out on each shunt tube

for optimum performance.

This type of screen is typically used in gravel packs for which

fracturing is not a priority. Treatment rates can be up to

2 bbl/min for each shunt tube, depending on the screen, the blank

length, and the type of gravel-pack fluid. Tube configurations

with multiple numbers of tubes are available for a wide variety of

gravel packing requirements.

Alternate Path shunt tubesprovide alternate slurry pathways that bypass bridges.

AllPAC and AllFRACSand control screens with Alternate Path technology

7/21/2019 AllPac and AllFrac Sand Control Screens With Alternate Path Technology

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AllPAC and AllFRAC Alternate Path Screens

*Mark of Schlumberger.

Mark of ExxonMobil; technology licensed exclusively to Schlumberger.

Copyright 2012 Schlumberger. All rights reserved. 12-SM-0013

AllFRAC screen

The AllFRACscreen is used in STIMPAC frac-pack completions. This

screen features one or more 1.500-in 0.750-in [38.1-mm 19.0-mm]

shunt tubes, attached either concentrically or eccentrically to the

screen joint, with 0.375-in [9.5-mm] exit nozzles spaced out on each

shunt tube for optimum performance. This screen is ideal for use inhigher-rate STIMPAC applications. Treatment rates can be up to

8 bbl/min for each shunt tube, depending on the screen, the blank

length, and the type of carrier fluid. As with AllPAC screens, tube

configurations with multiple tubes are available for a wide variety of

well treatments and multizone well types.

Alternate Path screen construction

Alternate Path screen construction offers many advantages.

The construction is robust. The screens are available in almost any

metallurgy, and the shunt tubes are made of durable stainless steel.

The nozzles are erosion resistant, and timed premium threads are

available for simultaneous torquing of the screen joints and aligning

of the shunt tubes. A unique connector design is also part of the systemallowing for easier makeup and deployment.

www.slb.com/chsc

ScreenOD

Screenshunt ring

Screenshunt ring

AllPAC Screen

93

Jointconnector

0.75 in.

Fishing OD

Jointconnector

OD

Pipe ODPipe OD

0.5 in.

1 in.

AllFRAC Screen

Jointconnector

OD

Fishing OD

1.5 in.

ScreenOD

090140H Wire

0.140 in.0.087 in.

0.090 in.

0.105 in.

0.090 in.0.089 in.

0.075 in.

090105 Wire

AllPAC Screen Wire and Construction

090075 Wire

090140H/090105090075/090075

Cross section of the AllPAC and AllFRAC screens.

AllPAC screen wire sizes, construction, and flow pattern.