© Baker Hughes Incorporated. All Rights Reserved. SLOPE SYSTEM - Preplanning a future Re-Entry

© Baker Hughes Incorporated. All Rights Reserved.

SLOPE SYSTEM - Preplanning a future Re-Entry

© Baker Hughes Incorporated. All Rights Reserved. | 2

What is the SLOPE System?

Selective Lateral Orientation Profile for ExitsA method of providing a pre-determined permanent

datum point, integral to the casing or liner string, for positive depth location and orientation for creating casing exits and future lateral re-entries

Complexity

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Why use a SLOPE system approach?

• Cost effective solution

• Simple installation on casing or liner string

• Standard cementing procedures observed

• No need for orientation of the casing string unlike a pre-milled window system

• Positive re-entry to each lateral

• Use at anytime in the life of the well

• Full burst and collapse rating of the casing

• Full bore access through entire casing string

• Allows normal drilling Completions & Remedial


When is SLOPE used?

• Need a casing exit for an ML junction Most common application as a Level 2

• Need multiple laterals from one common wellbore • Minimize trips for creating casing exits• Permanent alignment datum point required (Drilling,

Completions, Remedial, etc.)• Vertical exploration prior to drilling horizontal• When intervention will be required either by coil or joint

tubular• When step out exploration will occur at a later date


Installed in casing string at pre-determined points Burst and collapse ratings equivalent to casing size and weight Profile matches locating tool collet Existing Sizes:

5.5” 15.5-17# and 20-23# 7” 23-26# and 29-32# 9 ⅝ - Pending Q1 2011 - new features

The SLOPE System

Example


The SLOPE Nipple is an integral component of the casing string.

A landing collar is installed below the SLOPE nipple.

A pump through Straddle Wiper Plug is preinstalled in each SLOPE Nipple to isolate the locating/orienting profiles during cementing operations.

The SLOPE System


• Multiple SLOPE Nipples can be installed in the casing string for immediate or future usage.

• The selective collet design assures positive depth location.

SLOPE Selective Collet SystemPosition Order

#4

#3

#2

#1


SLOPE Selective Collet System - Operation

The casing string does not require orientation prior to cementing. Conventional cementing procedures are used. A SLOPE Casing Wiper Plug is launched from a standard casing

cementing manifold, following the cement. The SLOPE Casing Wiper Plug latches into and shears the Slope

Straddle Plug. The Stacked SLOPE Casing Wiper Plug latches the next Slope

Straddle Plug and shears the plug to continue down hole. The SLOPE plug system latches into a landing collar.


Locators

Drilling Locator•Positive depth control of whipstock assemblies

•Assures correct alignment of whipstock assembly

•Modular design to minimize equipment requirements

Completion Locator•Tubing connections on top and bottom

•Compatible with permanent or retrievable completions

•Retrievable for full bore workovers

•Positive alignment of selective completion assemblies

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Locators - Orientation

• The corresponding position locator sub is landed in the SLOPE Nipple to measure the exact depth.

• While landed, rotation of the work string aligns the locator’s orientation key in the SLOPE Nipple.

• Azimuth is measured by either the MWD or gyro method.

• The SLOPE Nipple now provides a permanent datum point in the well bore.

• The orientation BHA is retrieved.


Excluder Sub

Shear Sub

Unloader Sub

TorqueMaster Anchor

Debris Management System

Excluder Sub


Prior to running the whipstock BHA in the hole. The Spline Sub is adjusted to align the whipstock face per SLOPE Nipple orientation reading.

The whipstock BHA is run and landed in the SLOPE Nipple.

Once landed, right-hand rotation of the work string latches the locator sub orientation key in the SLOPE Nipple aligning the whipstock face to the correct azimuth.

Debris Management System - Operation


• Whipstock run with debris management system

• Whipstock aligned to desired azimuth• Drilling locator collets latch in selected

nipple• Assembly is rotated to latch alignment

key in slot• Window is cut and lateral drilledg

SLOPE and ML WindowMaster


SLOPE with Selective Completion

• Lateral Entry Nipple (LEN) is aligned to match casing window

• LEN provides positive lateral and main bore access and isolation when installed in conjunction with straddle packers

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1. Standard Packer Commingled Production Thru tubing re-entry into upper lateral will require

use of a Hydraulic Bent Joint Tool 2. Selective Production

Thru tubing re-entry into lower lateral only3. IWS Completion

Thru tubing re-entry into lower lateral only4. Selective Production with Lateral Access

LEN provides selective production & thru tubing access to both laterals.

Note: Use of a Locating Profile increase the completion and re-entry options

TAML Level 2 Junction - Completion


Case History 1: Level 2 - On Shore - AlbertaProject SummaryProject Date: December 2003Well location: On Shore AlbertaWell type: New wellFormation: ConsolidatedJunction type: Level 2 SLOPEJunction: 9,135 ft (2,785 m) @ 25°Drilling fluid: Under balancedMain bore casing: 7-5/8 and 7”Laterals: 6” and 4-3/4” Open hole

BHI Products and ServicesBOT WindowMaster Whipstock systemSLOPE

Project ResultsCreation of a dual lateral SLOPE Level 2 Junction. Depth of +/- 9000 ft (2,785 m)

at 25° while drilling in an under balanced environment. The SLOPE system and procedures were 100% successful. A field proven solutions working under balance.


Case History 1: Level 2 - On Shore - AlbertaCompletion Description

Main bore was set with the drilling rig The WindowMaster Whipstock was run and

landed in the SLOPE The window was cut and a rat hole reamed

creating the casing exit Intermediate hole was drilled and a plop and

dropped liner was cemented into place The whipstock was retrieved and the drilling rig

was moved off the location A Coil tubing rig onto location with under

balance drilling equipment A 6” open hole was drilled to TD Well was tested Whipstock was landed back into the SLOPE

where the existing casing exit was already present

4-3/4 open hole was drilled out of the plopped and dropped liner

Whipstock was retrieved Final completion was run


Case History 2: Level 2 – On Shore - CanadaProject SummaryProject Date: July 2005Well location: On Shore CanadaWell type: New wellFormation:Shale and limestoneJunction type: Level 2 SLOPEJunction: 5,660 ft (1,725 m) @ 0°Main bore casing: 7” 23#Laterals: 6” Open hole

BHI Products and ServicesSLOPECompletion Equipment

Project Results100% successful installation of the Baker

SLOPE system


Case History 2: Level 2 – On Shore - CanadaProject Overview• Vertical wells in this area have traditionally been strong

candidates for reentries. The lowest zone produces vigorously for one/three years. As the reservoirs’ pressure drops the upper horizontal zones can be drilled and added to the production. There are three additional zones of interest. A decision will be made later (one to three years) whether one or more of the upper reservoirs will be added.

• The operator selected the Baker SLOPE system as the only economical solution. The SLOPE was included in the final casing string for future sidetracks. It provided a base to create one or more level two junctions. The greatest advantage to the SLOPE system is there is no ID restriction that limits your options. There are no safety issues with compromising the casing integrity with pre-milled windows. The SLOPE has the same burst and collapse ratings of the casing that it is installed in . The mainbore casing was cemented into place and the lowest zone was perforated. The Baker Hornet Packer was run through the SLOPE nipple and set with 2-7/8” tubing was tied into the surface. The well was ready for production.

• The Baker SLOPE will provide the base for future development of the well. This marks the first time a company has had the forethought to install multilateral equipment that will be utilized years down the road. It reduces the cost and increases the flexibility of the well and creates a more effective design.


Case History 2: Level 2 – On Shore - Canada

Completion Description Main bore was drilled and a 7” 23 lb

casing was installed

Included in the casing string was a Baker SLOPE profile #1

The retrievable back passed through the Baker SLOPE nipple to be set just above the perforations


Case History 3: Level 2 – On Shore - KazakhstanProject Summary

Project Date: August 2005Well location: On Shore KazakhstanWell type: New wellFormation: ConsolidatedJunction type: Level 2 SLOPEJunction #2: 17,095 ft (5,211 m) @ 81°Junction #1: 17,510 ft (5,337 m) @ 82°6” Lateral legs: Approx 1,970 ft (600 m) @ 90°Main bore casing: 9-5/8” and 53.50Lateral casing size: 7” 32#

BHI Products and ServicesBOT WindowMaster Whipstock systemBOT CompletionSLOPEAtlasINTEQ Directional DrillingBaker Hughes Fluids

Project ResultsCreation of a tri-lateral SLOPE level 2 Junction @ +5000 meters (17,510 ft) 100% successful.

Implementation of a Baker Hughes Solution. A field proven solution to replace level one junctions as well as a strong foundation for level 2 junctions.


Case History 3: Level 2 – On Shore - KazakhstanProject Overview• The operator was looking for incremental

production increases from a singular reservoir located at +5300 meters (17,500 ft). The options available were: drill three separate wells, or a multilateral solution. The economics quickly showed that a multilateral solution was the best answer.

• The operator decided that the Baker SLOPE system was the best system for their wells. The SLOPE system is a low risk highly versatile multilateral system. The SLOPE nipple becomes an integral part of the A 7” liner. The inclusion of 2 Baker SLOPE nipples in the liner installation provides the foundation for a Tri-lateral level 2 wellbore. The Baker SLOPE nipple permits all normal practices to be utilized when running and cementing the liner into place. These 2 SLOPE nipples are now a permanent reference point in the wellbore. This permits all operations to occur with out an ID restriction. Each leg was drilled horizontally for approximately 600 meters resulting in crows’ foot profile in the reservoir. The SLOPE nipples and the casing exits were accomplished at +80° of inclination. By commingling all three legs, the completion is simplified. At any time, the SLOPE nipples can be reused to reenter the designated legs, or act as a base for additional laterals to be installed.

• The versatility, track record and ease of installation of the Baker SLOPE system leaves no doubt that it is the solution for level 2 junctions at any depth.

Documents

© Baker Hughes Incorporated. All Rights Reserved. SLOPE SYSTEM - Preplanning a future Re-Entry