DHT_Latch-Les Wireline Coring System

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N° DHT_000000307

Rev 00

Date: 4 April 2008Operations Manual

Page 1 of 32

Halliburton Secur ity DBS NV, Av. Paul Gilson 470 B1620 Drogenbos. BELGIUM Tel: +32 (0) 2 333 35 10

Copy is uncontrol led.

Operations Manual

Latch-Les Wireline Coring System

4 ¾ x 1.713


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Latch-Les 4 ¾ x 1.713 Operations Manual

Table of Contents

1. Tool Introduction......................................................................................................4

2. Equipment Preparation............................................................................................5

3. Equipment Description ............................................................................................6

3.1 Outer Assembly ..........................................................................................6 3.2 Inner Assembly ...........................................................................................7

4. Operation.................................................................................................................8

4.1 Picking Up the Latch-Les Equipment ..........................................................8 4.2 Running in Hole ........................................................................................11 4.3 Dropping the Inner Assembly....................................................................11

5. Drill Plug Assembly................................................................................................15

6. Troubleshooting Guide ..........................................................................................16

APPENDIX

Appendix II: Inner Tube Spacing...............................................................................23 Appendix III: Drill Plug Assembly ..............................................................................24 Appendix IV: Overshot Assembly..............................................................................26 Appendix V: Assembly Drawings ..............................................................................28 Appendix VI: Technical Specifications ......................................................................31

Appendix VII: Repair Assessment Form ...................................................................32

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NOTICE

This manual contains CONFIDENTIAL and PROPRIETARY INFORMATION and is the

property of Security DBS Drill Bits. Neither this manual nor information contained herein shall

be reproduced in any form, used or disclosed to others for any purpose including manufacturing

without express written permission of Security DBS Drill Bits. Manuals are company property

and non-transferable to other employees, unless authorized by Management. You are

responsible for this manual. DO NOT leave this manual where it may be photocopied by others.

This manual is designed to provide information useful for the optimal utilization of the

Posiclose. Charts, descriptions, tables and other information contained herein may have been

derived from actual tests, simulated tests or mathematical models. Although information has

been carefully prepared and is believed to be accurate, Security DBS Drill Bits cannot guaranteethe accuracy of all information contained herein. Security DBS Drill Bits reserves the right to

modify equipment, documentation, and procedures that may differ from those described herein.

Trained Security DBS Drill Bits personnel act as consultants to Security DBS Drill Bits

customers. Practical judgement and discretion must be used, based upon experience and

knowledge, to review the circumstances for a particular job and then to perform the job in a

professional manner. Accordingly, the information contained herein should be used as a guide

by trained personnel, and no warranties, expressed or implied, including warranty of

merchantability or fitness for use, are made in connection herewith. In no event will Security

DBS Drill Bits be liable for indirect or consequential damages arising from the use of the

information contained in this manual, including without limitation, subsurface damage or

trespass, or injury to well or reservoir.Field personnel or user of this manual are encouraged to comment or make suggestions for

improvement on this manual. Users are also responsible to ensure they have the latest copy of

the manual. Please forward all communication to the Technical Support in Brussels.

© 2008 Halliburton. All rights reserved.

This Operation Manual is intended for use by field personnel as a quick reference information

source for the Latch-Les Wireline Coring System.

The manual focuses on the specifics of the Latch-Les Wireline Coring System. Procedures

relating standard coring operations can be found in the “Coring Operations Manual”.

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1. Tool Introduction

The Security DBS Latch-Les Wireline Coring System is an integrated package consisting of

a Security DBS Heavy Duty Outer Barrel assembly combined with a wireline retrievable inner

core barrel. Another wireline system is also available in a 6 ¾ size as a LLTTS (Latch-Les Triple

Tube System).

The Security DBS Latch-Les Wireline Coring System is designed to operate through

conventional oilfield drill strings (2”1/4 minimum drift).

The Wireline unit is not part of the “Latch-Les kit”. The Drilling contractor supplies the

Wireline Unit with associated equipment to rig up the wireline on the drill floor.

The comprehensive “Latch-Les kit” is intended to cover about of 1000 ft of coring. A

summarized listing is as follows:

• Outer Barrel Assemblies.

• Inner Tube Assemblies + spares and consumable.

• Handling tools for on site work with the Latch-Les system.

• API drift for the drill string.

• Core recovery and layout equipment including a pump assembly.

• Wireline rope sockets to suit the rig wireline unit, sinker bars and overshot for the

inner core barrel assembly.

• Coreheads must be ordered separately. They are not part of a “Latch-Les kit”.

Remark: The minimum drift requirement for Latch-Les Wireline Coring System is 2”¼.

The core size is 1.713”

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2. Equipment Preparation

Before departing for the well site:

A. Obtain the following pertinent information from the salesman:

Customer expectations

Paperwork regarding the sale

Well or rig data

Customer’s representatives names

Type and diameter of the wireline to ensure adequate rope socket is included in the

kit

B. Collect work location paperwork

C. Inspect the core barrel:

Measure and record parts length

Measure and record OD of stabilizers

Record core barrel serial numbers

Verify that the measurements meet job specifications

D. Check the bit:

Record bit condition if it has been used

Inspect OD and ID gauges; record inspection

Record the bit serial number, size and type

E. Inspect contents of tool box. Verify that:

Tools are in working condition

Spare parts meet job requirements

Check Wireline type and size

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3. Equipment Description

3.1 Outer Assembly

Figure 3.1: Latch-Les 4 ¾ HDT System – Outer assembly

Total length (without corehead): 35 ft 10 inches (10.92 m).

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3.2 Inner Assembly

Figure 3.2: Latch-Les 4 ¾ HDT System – Inner assembly

Total length (without corehead): 35 ft 1 inches (10.7 m).

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4. Operation

4.1 Picking Up the Latch-Les Equipment

Make-Up of the Inner Assembly

Spear Head

Assembly

- Ensure the swivel rotates.- Fill the swivel with grease using the grease gun.- Adjust the initial spacing (see page 10).

1

2

3

4

6

5

ExtensionSub

Upper Inner

Tube

Lower Inner

Tube

4

Saver

Sub

Core Lifter

Case

- Use Loctite on all threads.- Make-Up connections handtight, no “cheater bars”.

6

Place Inner Assembly in Scabbard

Hoist Scabbard & set in mousehole

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Make-Up of the Outer Assembly

Note: For complete procedure, refer to Appendix I.

Pick-Up - Check if landing ring is in place in the hangersub.

- Pick-up the outer barrel.- Ensure the outer tube protector is made up tight.- Remove the hole cover and set slips around the

outer tube bottom plug.1

Make-Up - Make-Up all outer barrel’s connections to 9600ftlb (1305 daNm). Use rig tongs.

2

Space Inner

Assembly- See page 10.

3

Make-Up

Corehead

4

Surface Test - Record SPP at 300 gpm:- with Inner Assembly in place.

- without Inner Assembly in place.

Record difference in pressure! 5

- R.I.H. without Inner Assembly inplace.

6

R.I.H

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Inner Assembly Spacing

Note: Latch-Les Wireline Coring Gauge is required. Standard Security DBS Coring Gauges are

not adequate.

For complete procedure, refer to Appendix I.

- Make-Up outer barrel (see page 9).

- Pick-up the inner tube from inside thealuminium scabbard. Use overshot.

- Lower the inner assembly into the outer barrel. Release overshot with releasing

tool.

- Hoist the outer barrel above the rotarytable and remove the outer tube bottom

plug.

Check

Correct

Spacing ? YES

Pick-up

- Check the inner tube spacing with theLatch-Les Make-Up Gage (see Appendix

II ).

Record exact length of Inner

Assembly and space the

second Inner Assembly.

Keep dimension for future

reference.

Ready

NO

- Measure length for correct spacing.- Make-Up the outer tube bottom plug and

lower the core barrel in hole.

- Hoist the inner assembly and adjust thespear head (the adjustment rate is 3.6mm

per revolution).

- Drop the inner assembly and pull the outer barrel out of the rotary table.

Adjust

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4.2 Running in Hole

4.2.1 To reach the bottom of the hole, several thousand feet of drill pipe may have to be

connected. Ensure that there are no restrictions in the string to stop the passage of the

inner assembly. Drift all components vertically with the 2”1/4 drift.

4.2.2 Wash down a minimum of 20 minutes to bottom. Circulate at a high flow rate to

ensure the core barrel is free of fill.

4.3 Dropping the Inner Assembly

4.3.1 Wash down a minimum of 20 minutes to bottom. Circulate at a high flow rate to

ensure the core barrel is free of fill.

4.3.2 Break the drill pipe connection.

4.3.3 Pull the inner assembly out of the aluminium scabbard using the slip plate and lower

it into the drill pipe until the slip plate rests on the drill pipe connection.

4.3.4 Drop the Inner Assembly from surface by removing the slip plate. Time for the Inner

Assembly to reach the bottom depends on mud characteristics and depth. To be on a

safe side, count about 20 minutes per 3000 ft (915m). During drop time, pumps must

be off.

4.3.5 Check if the Inner Assembly is landed; pump 300 gpm (1360 l/min) and record theSPP. The pressure difference with/without the Inner Assembly landed should be the

same as the pressure difference recorded during surface test. If there is no pressure

difference, immediately stop the pumps and wait a few minutes. Then, check again.

4.3.6 When Inner Assembly is in place, start coring.

4.4 Dropping the Inner Assembly

4.4.1 Rotate the coring assembly at 60-70 rpm with the pumps on at the desired circulatingrate. Lower the core barrel to bottom. Apply a starting WOB of less than 5000 lb

(2270 kg). Maintain these parameters until the core bit has cut the matching profile

on bottom.

WARNING: Maximum flow rate = 350 GPM (1600 l/min)

4.4.2 When the profile is cut, increase the WOB by increments while observing the rotary

torque response. Maintain a low rotary speed of less than 70 rpm until 1’ to 3’ (0.3 to

0.9 m) of core have been cut.

4.4.3 Once the initial 1’ to 3’ (0.3 to 0.9 m) of core has been cut, adjust WOB and rpm to

achieve optimum ROP.

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4.5 Jamming Indication

In addition to a clear pressure indication of the inner assembly position, the hydraulics

configuration of the Latch-Les provides a powerful jamming indicator. Upon jamming, the inner

tube assembly is slightly lifted upwards which creates a restriction to the flow area in the head /landing ring assembly (see Figure 4.1).

The pressure increase when jamming is around 500 psi (at 300 gpm - 9 ppg) (35 bar at

1360 l/min - 1080 kg/m³) which is very easily observed at surface. This pressure increase may be

smaller and may disappear quickly if jamming resolves. If the pressure increase is permanent,

the inner assembly must be POH immediately to ensure no core is lost and recovery rates are

maintained at maximum levels.

Figure 4.1: Jamming Indication

Coring Jamming

SPP = 500 psi (35 bar)

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4.6 Retrieving the Inner Assembly

4.6.1 Stop the pumps.

4.6.2 Pull to break the core. Pull one single.

4.6.3 Break the drill string connection.

4.6.4 R.I.H. with overshot assembly.

4.6.5 When the overshot is latched on the spear head, hoist the inner assembly up to

surface.

4.6.6 Lower the inner assembly into the aluminium scabbard in the mouse hole.

4.6.7 Hoist the aluminium scabbard and lower it on the catwalk.

4.7 Core Recovery

4.7.1 Pull out the inner assembly out of the aluminium scabbard.

Note: Handle the inner assembly carefully when pulling out of the aluminium scabbard, hold the

inner assembly at each extremity and at the middle connection.

4.7.2 Place the inner assembly on the jacks (see Figure 4.2).

Note: Place the jacks correctly to avoid flexion of the inner assembly.

4.7.3 Remove the spear head assembly. Use Inner Tube Wrench.

4.7.4 Place the pump out plunger inside the upper inner tube (ensure the ‘O’ rings are

fitted).

4.7.5 Fit the pump out bean heavy wall on the upper inner tube.

4.7.6 Switch on the water pump.

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Figure 4.2: Surface Layout

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5. Drill Plug Assembly

The Drill Plug Assembly is an alternative inner assembly which can be used with the Latch-

Les Wireline Coring System (see Appendix III). The Drill Plug Assembly converts the corehead

into a drill bit by the use of a specially designed center plug run at the end of the inner assembly.

The main differences between the Drill Plug Assembly and the Coring Inner Assembly are:

1. The Drill Plug Assembly is latched in place.

2. The swivel is positioned right above the drill plug.

3. Thicker inner tubes are used to strengthen the inner assembly.

Whereas the coring Inner Assembly is dropped from

surface, the Drill Plug Assembly must be lowered in

hole using the wireline and the overshot assembly!

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6. Troubleshooting Guide

The inner assembly is stuck and cannot be retrieved with the wireline:

A. Retrieve the Overshot Assembly. To do so:

1. Fit the locking sleeve on the wireline and drop it.

2. Slack the wireline to ensure the overshot rests on the spear head.

3. Pull out the overshot assembly.

B. P.O.H.

The core is stuck in the inner tube:

1. Use pump valve to transmit hydraulic shocks on the pump out plunger.

2. Use a rubber hammer to knock on the inner tubes.

3. If it is not sufficient, break the inner tube middle connection and use second pump outbean (standard - lower tube) to fit the pump unit.

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APPENDIX

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Appendix I: Complete Procedure

Make-Up of the 4” 3/4 Outer Barrel Assembly

1. Pick up the outer barrel from the catwalk using the crane and drill floor air winch.

2. Swing the outer barrel through the V-door and latch the drill pipe elevator around the

elevator sub. Check that the elevator latch is fully closed.

3. With the pipe elevator secured around the outer barrel elevator sub, and the outer barrel

weight taken in the elevator, slack off on the upper lifting slings and remove the sling from

the outer barrel.

4. Using the travelling block and elevator, carefully hoist the outer barrel into the vertical

position. Control the motion of the outer barrel’s lower end into the drill floor area.

5. Remove the lower hoisting sling and crane hook when the outer barrel is in the vertical

position and held securely with a hydraulic racking arm, Kelly stabber, or with the outer

barrel’s lower end in the mouse hole.

Caution: It is important to restrain the swinging motion of the outer barrel on floating installations

or in high winds.

6. Ensure that the extended outer tube protector is made up tight. Use chain tong and a sledge

hammer.

7. Remove the hole cover and set slips around the outer tube bottom plug. Set down the full

outer barrel weight.

8. Make-Up the near bit stabilizer to the internal centralizer coupling connection to the

recommended torque. Use rig tongs.

Note: Avoid placing the rig tongs on the box connection during the make-up procedure. Use

alternative means to restrain the outer barrel movement during the make-up operation. An

effective alternate method is running an air winch line through a shackle and sheave

positioned at the V-door entrance.

9. Make-Up the internal centralizer coupling to the outer tube connection to the recommended

torque. Use rig tongs.

10. Pick up the outer barrel and remove the slips. Lower the outer barrel and set slips around the

top of the lower outer tube.

11. Make-Up the outer tube connection to the middle stabilizer connection to the recommended



middle stabilizer.

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13. Make-Up the middle stabilizer to the middle internal centralizer coupling connection to the


14. Make-Up the middle internal centralizer coupling to the upper outer tube connection to the



top of the upper outer tube.

16. Make-Up the upper outer tube to the hanger sub connection to the recommended torque. Use

rig tongs.

17. Set the safety clamp above the slips.

18. Space the inner assembly (see page Appendix IIError! Bookmark not defined.).

19. Thread the corehead onto the outer barrel assembly by hand. Fit the bit breaker. Tie offacross the core bit breaker plate handles.

20. Remove the hole cover and install the core bit breaker plate. Position the bit breaker inside

the bit breaker plate. Make-Up the core bit to the recommended torque. Use rig tongs.

21. Raise the core barrel above the rotary table. Cover the hole. Visually check the inner tube’s

space within the corehead throat.

22. Run the completed outer barrel assembly back into the hole. Set the slips and safety clamp

above the upper sub.

23. Break out and lay down the elevator sub.

24. Pick up the inner assembly using the overshot.

25. Make-Up the BHA. Ensure that there are no restrictions in the drill string that would prevent

the passage of the inner assembly. Use the drift 2 1/4” OD.

26. Record SPP at 300 gpm (1365 l/min) with and without Inner Assembly in place.

27. R.I.H. without Inner Assembly in place.

Make-Up of the 6” 3/4 Outer Barrel Assembly

1. Pick up the outer barrel from the catwalk using the crane and drill floor air winch.

2. Swing the outer barrel through the V-door and latch the drill pipe elevator around the

elevator sub. Check that the elevator latch is fully closed.

3. With the pipe elevator secured around the outer barrel elevator sub, and the outer barrelweight taken in the elevator, slack off on the upper lifting slings and remove the sling from

the outer barrel.

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4. Using the travelling block and elevator, carefully hoist the outer barrel into the vertical

position. Control the motion of the outer barrel’s lower end into the drill floor area.

5. Remove the lower hoisting sling and crane hook when the outer barrel is in the vertical

position and held securely with a hydraulic racking arm, Kelly stabber, or with the outer

barrel’s lower end in the mouse hole.

Caution: It is important to restrain the swinging motion of the outer barrel on floating installations

or in high winds.

6. Ensure that the extended outer tube protector is made up tight. Use chain tong and a sledge

hammer.

7. Remove the hole cover and set slips around the outer tube bottom plug. Set down the full

outer barrel weight.

8. Make-Up the near bit stabilizer to the lower outer tube connection to the recommendedtorque. Use rig tongs.

Note: Avoid placing the rig tongs on the box connection during the make-up procedure. Use

alternative means to restrain the outer barrel movement during the make-up operation. An

effective alternate method is running an air winch line through a shackle and sheave

positioned at the V-door entrance.


top of the lower outer tube.

10. Make-Up the lower outer tube to the middle stabilizer connection to the recommended



middle stabilizer.

12. Make-Up the middle stabilizer to the upper outer tube connection to the recommended



top of the upper outer tube.

14. Make-Up the upper outer tube to the upper stabilizer connection to the recommended torque.

Use rig tongs.


upper stabilizer.

16. Make-Up the upper stabilizer to the upper sub connection to the recommended torque. Use

rig tongs.

17. Set the safety clamp above the slips.

18. Space the inner assembly (see Appendix II).

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19. Thread the corehead onto the outer barrel assembly by hand. Fit the bit breaker. Tie off

across the core bit breaker plate handles.

20. Remove the hole cover and install the core bit breaker plate. Position the bit breaker inside

the bit breaker plate. Make-Up the core bit to the recommended torque. Use rig tongs.

21. Raise the core barrel above the rotary table. Cover the hole. Visually check the inner tube’s

space within the corehead throat.

22. Run the completed outer barrel assembly back into the hole. Set the slips and safety clamp

above the upper sub.

23. Break out and lay down the elevator sub.

24. Pick up the inner assembly using the overshot.

25. Make-Up the BHA. Ensure that there are no restrictions in the drill string that would preventthe passage of the inner assembly. Use the drift 2 1/4” OD.

26. Record SPP at 300 gpm (1365 l/min) with and without Inner Assembly in place.

27. R.I.H. without Inner Assembly in place.

Inner Tube Spacing

1. Ensure “Initial Make-Up of the Outer Barrel” has been done.

2. Put the inner assembly inside the aluminium scabbard.

3. Use the trolley to drive the aluminium scabbard to the catwalk.

4. Pick up the aluminium scabbard using the crane and drill floor air winch. Hoist the

aluminium scabbard in the vertical position. Lower the aluminium scabbard into the mouse

hole.

5. Pick up the inner assembly using the overshot and hoist it in the vertical position.

6. Lower the inner assembly into the outer barrel. Use the releasing tool to release the overshot.

7. Remove the safety clamp and hoist the outer barrel above the rotary table. Drain the mud

from the core barrel. Place the hole cover over the rotary bushings.

8. With the outer barrel hanging, break out and remove the outer tube bottom plug using chain

tongs. If chain tongs cannot be used satisfactorily, place the lower end of the outer barrel in

the mouse hole to break out the protector using rig tongs.

9. With the outer barrel hanging vertically, ensure that the inner tube is free to rotate. Check theinner tube spacing with the DBS Make-Up Gage (see Appendix II).

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Appendix II: Inner Tube Spacing

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Appendix III: Drill Plug Assembly

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Appendix IV: Overshot Assembly

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Appendix V: Assembly Drawings

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Appendix VI: Technical Specifications

Technical Specifications (Imperial)

General Specifications

Hole Size Compatibility (in.) 6 - 7Maximum Flow Rate (gpm) 350

Core Size (in.) 1.713

Core Capacity (ft) 32

Core Barrel Type Heavy Duty

Drill String Drift Diameter (in.) 2 1/4

Outer Assembly

Top Connection 3 1/2 IF

Overall Length (ft) 37.3

Outer Barrel ODxID (in.) 4 3/4 x 3 3/4

Hanger Sub ID (in.) 2 13/16

Inner Stab. Positions (ft) 2 - 17 - 32

Pulling Capacity * (lbs) 246000

Maximum Torque ** (ft-lbs) 14800

Make-Up Torque *** (ft-lbs) 9600

Inner Tube Assembly

Overall Length (ft) 35

Maximum OD (in.) 2 3/32

Inner Tube (in.) 2 x 1.782

Technical Specifications (Metric)

General Specifications

Hole Size Compatibility (mm) 152 - 178

Maximum Flow Rate (lpm) 1325

Core Size (mm) 43.5

Core Capacity (m) 9.75

Core Barrel Type Heavy Duty

Drill String Drift Diameter (mm) 57.15

Outer Assembly

Top Connection 3 1/2 IF

Overall Length (m) 11.4

Outer Barrel ODxID (mm) 121 x 95

Hanger Sub ID (mm) 71.4Inner Stab. Positions (m) 0.6 - 5.2 - 9.7

Pulling Capacity * (T) 111

Maximum Torque ** (daNm) 2000

Make-Up Torque *** (daNm) 1300

Inner Tube Assembly

Overall Length (m) 10.7

Maximum OD (mm) 53.2

Inner Tube (mm) 50.8 x 45.3

(*) P.C. calculated w ith tensile stress = 80% of the yield strength

(**) Maximum Torque is about 80% of the yield torque

(***) M.U.T. is based on torque test performed in Security DBS lab facilities

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Appendix VII: Repair Assessment Form

Repair Assessment Form

Please send a copy of this document to Brussels Technical Support by email at DHTSBrussels (Mailbox) or fax +32 2 3333579.

XR Model

Part SAP N°

Description of Damage: (Please provide as much information as possible, type of damage, depth of damage etc)

Please provide Photographs of Damaged Area :

DHT_Latch-Les Wireline Coring System

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