Wellbore Enlargement DPA Rio

7/30/2019 Wellbore Enlargement DPA Rio

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February 2011

Borehole EnlargementUnderreamersMario Breton

What is underreaming.

Underreaming applications.

XTU and Rhino Reamer.

Engineering support.

Content


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Underreaming is a process of enlarging a

section of wellbore beneath a restriction.

Cutters have to be expandable and

retractable.

What is underreaming?

Swelling formations: reduce risk

of stuck pipe.

Increase annular space for

cement operations.

Increase clearance for smoothcasing runs.

Gravel pack applications.

Key seat removals.

Why underream?


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World Class Underreamers

XTU

Customized cutting structures to make the tool

suitable to different drilling environments.

Ability to enlarge an existing pilot hole up to 70%.

Sealed bearings for milled tooth and TCI cutting

structures.

Strategically placed nozzles.

Positive lock keeps arms in the open position.


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XTU Features

One-piece forged cutter arms.

Ability to run more drilling

weight on the tool.

withstand high shock and

torque loads.

XTU Features

Milled tooth cutters

Mainly used in soft formations.

Sealed bearing design to increase tool

durability.

Designed to withstand high lateralloads.

Available for all tool sizes.


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XTU Features

TCI

Mainly used in medium and medium-hard

formations.

Sealed bearing design to increase tool durability.

Designed to withstand high lateral loads.


XTU Features

PDC

Mainly used in medium-hard and hard formations.

Designed to withstand high lateral loads.

Optimized ROP.Recommended for long intervals runs.



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XTU Features

XTU Features


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Rhino Ream Hole IN and Out

Enlargement of existing pilot holes in a wide

range of formations.

Simultaneous drilling and hole enlargement

in operations where reliability is critical.

Enlargement operations run with directional

drilling assemblies.

Long interval runs.

Applications


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Rhino XS Internal Components

Balanced mass design to eliminate

vibrations.

Optimized fluid distribution between bit

and cutter blocks.

Backreams effectively with strategically

placed cutters.

Lock-up System to prevent cutter block

deployment during shoe track drill out.

Features


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Features

Hole Quality

Cutter blocks deploy simultaneously producing

a concentric, full gauge, high quality wellbore.

Toughness

Tongue and groove activation system traverses

the cutter blocks to a pre-selected diameter and

hydraulically secures them in place.

Single piece body design increases vibration

and torque load capabilities.

Features

Ball Drop Mechanism:

Lock up system to prevent

cutter block deployment during

shoe track drill out.

Pressure indication at surface

to signal full cutter blockdeployment.

Hydraulic analysis

recommended to determine

shear out flow rate.


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Features

Hydraulics

Cutter blocks are hydraulically actuated using

pressure differential over cutter piston (800 psi

minimum).

Pressure indication at surface indicates when

cutter blocks are fully deployed.

Cutter blocks collapse when pumps are turned

off.

Stabilization System

Rhino XS

Rhino Stabilizer

Tungsten Carbide Hardfacing

Z-Drive Tongue

& Groove

Actuation

Diamond

Enhanced Gauge

Inserts


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Stabilization System

Rhino XS

Rhino

StabilizerFeatures and benefits

Improves drilling efficiency

and performance reducing drill

string vibrations.

Improves hole quality.

Increases life of downhole

equipment.

DEI in the stabilizer blocks

provides superior wear

resistance.

Cutter blocks development


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Formation Cutting Structure

Optimized in IDEAS to

reduce vibration

Stabilizer/Gauge Pad

Maintains hole gauge

Backreaming Cutting Structure

Ensures borehole quality in all formation

types

Z-Drive Tongue& Groove Actuation

For reliable block

deployment

and retraction Fluid Flow Path

Across cutting surface

Improves well cleanout

Formation Cutting Structure

Optimized in IDEAS to

reduce vibration


Z-Drive Tongue

& Groove Actuation

For reliable block deployment

and retraction

Stabilizer Pad /

Passive Gage

Cutting Structure

Optimized in IDEAS to reduce

vibration

Backreaming Cutting Structure

Ensures borehole quality in all

formation types

Stabilizer/Gauge Pad

Helps reduce vibration

Single set design

Thermally stablePDC cutters available


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New Design

Introduction of thermally stable cutters.

Flatter shoulder profile reduces lateral and

axial acceleration.

3rd row of cutters in shoulder.

Outcome:

Smoother bottom hole pattern.

Predator Cutter Blocks

50% reduction on WOR Fluctuation


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Predator Cutter Blocks

60% reduction on torque.

Ideas Analysis Request (IAR).

Stress BHA.

HART.

Drilling record system.

Road Maps

Engineering Support


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Reamer hole pattern.

Reamer lateral displacement.

Reamer lateral force.

WOR fluctuations.

Reamer torque.

WOB/WOR.

RPM fluctuations.

IAR

IAR

Reamer with

MDi616LHBPX(Analysis 1)

Reamer with


Reamer Hole Pattern


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IARWOR (Weight on Reamer)

Reamer withMDi616LHBPX(Analysis 2)

6233ft / 15klbs / 120rpm /

No Steering

Wellington Shale 2-5kpsi

UCS

Reamer with


5577ft / 15klbs / 120rpm /

No Steering


UCS

Reamer Axial Acceleration

IAR

Reamer with


6233ft / 15klbs / 120rpm /

No Steering


UCS

Reamer with


5577ft / 15klbs / 120rpm /

No Steering


UCS

Reamer Torque


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Stress BHA

Lateral forces on the Underreamer cutters.

Side loads on stabilizers.

Connection index.

HART


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Road Maps


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Customer Rhino

Series

Depth

In (ft)

Footage

(ft)

Time (hrs) ROP (ft/hr)

Anadarko 11750 18980 8088 264.5 44.9

Shell 10000 10020 7516 100.7 108.3

Shell 11625 8705 8792 119.6 82.9

Shell 14250 8047 6554 124.5 52.6

Anadarko 11625XS 19823 6266 166.5 37.6

Best in Class Performance

Overall Run Rating & Dull Rating: Above AverageFormations: Sand, Shale

THANK YOU

Documents

Wellbore Enlargement DPA Rio