MN-CFBM36

Date:

Author:

Revised:

Approved:

Page 1 of

Tel. +44(0)1252 862 200 http://www.sondex.com Fax. +44(0)1252 862 349 email: [email protected]

This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Created November 11, 2005

Tool Code: CFBM36

Document: MN-CFBM36-C

Caged Fullbore Flowmeter

CAGED FULLBORE FLOWMETER

111/16 body x 41/2 casing, 6-Arm, CTF type, HADESMECHANICAL SECTION

Operational & Maintenance Manual

27th March 2003

Daphne Outwin, Neil Harris

11th November 2005, Ferry van der Vorst

Ken Coello

Caged Fullbore Flowmeter CFBM36ContentsC o n t e n t s

0 About This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0-10.1 Manual History 0-10.2 Updates To Be Used With This Manual 0-10.3 Technical Help 0-10.4 Feedback 0-1

1 Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11.1 Operating Principle 1-11.2 Applications Of The CTF 1-11.3 Interfacing & Tool Combinations 1-11.4 Specification 1-21.5 Associated Documents 1-2

2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12.1 General 2-12.2 Safety of Personnel 2-12.3 Safety of Equipment 2-2

3 Theory Of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13.1 Description 3-1

3.1.1 Spinner Section 3-13.1.2 Electronics Section 3-13.1.3 Sensor Section 3-1

4 Operating Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14.1 Pre-logging Checks 4-1

4.1.1 Mechanical 4-14.2 Calibration 4-24.3 Connecting To Toolstring 4-24.4 Logging 4-24.5 Post Logging Disassembly 4-2

4.5.1 General 4-24.5.2 Flushing 4-3

4.6 Transport, Handling & Storage 4-3

5 Mechanical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15.1 Disassembly 5-1

5.1.1 Removal Of Upper Bearing 5-15.1.2 Removal Of Lower Bearing 5-25.1.3 O-rings 5-2

5.2 Reassembly 5-3This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 ii

Caged Fullbore Flowmeter CFBM36Contents6 Extended Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16.1 Preventative Maintenance 6-1

6.1.1 Grease & Lubricants 6-16.1.2 Mechanical 6-1

6.2 Extraordinary Maintenance 6-26.3 Troubleshooting 6-3

APPENDIX A Equipment & Recommended Spares . . . . . . . . . . . . . . . .A-1

APPENDIX B Drawings & Parts Lists . . . . . . . . . . . . . . . . . . . . . . . . . . .B-1This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 iii

This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005

Caged Fullbore Flowmeter CFBM36Chapter 0. About This Manual

0-1

0 ABOUT THIS MANUAL

0.1 MANUAL HISTORY

0.2 UPDATES TO BE USED WITH THIS MANUAL

Consult the CD Directory for the appropriate Manual Updates to be used with this Manual.

0.3 TECHNICAL HELP

For further technical help contact Sondex as follows:

Address: Unit 1, Saxony Way, Blackbushe Business Park, Yateley, Hampshire, GU46 6ABUnited Kingdom

Telephone: +44(0)1252 862 200Fax +44(0)1252 862 349Email: [email protected]

0.4 FEEDBACK

Please help us improve future issues of this manual by sending your comments or corrections [email protected], referencing the document number.

Thank you.

Photographs and sketches are for illustration purposes only. Depending on the toolmodel that you have, certain features or dimensions may differ from those shown.

Date Issue Description Auth Chk App27/03/03 A First Issue. DMO SA NH06/11/03 B Drawing Updated. DMO SA NH11/11/05 C Equipment, Safety, Extended Maintenance

added.FV SA KC

Caged Fullbore Flowmeter CFBM36Chapter 1. Description1 DESCRIPTION

The CTF type Caged Full Bore Flowmeter is part of the HADES (High Temperature) Toolstring,together with the Capacitance Water Holdup tool and the Temperature tool. The tools provide thebasic PL measurements within a short tool length. The short distance between these three basicsensors means that the fluid measurements are essentially made from the same sample of fluid. Inthe case of standard tools, the equivalent three sensors will be at least six times further apart andso in heterogeneous flow are less likely to be providing measurements within the same fluid simul-taneously.

The Sondex Caged Full Bore Flowmeter is used at the bottom of the Production Logging toolstring,providing accurate flow data information over a large cross section of the casing.

The 6-Arm Caged Full Bore Flowmeters arms are formed from six bow springs, with additional coilsprings built into the folding mechanism. They are capable of supporting the weight of the spinner ina horizontal well. This also gives added protection to the fullbore spinner when used in wells withside pockets and in horizontal wells.

The spinner and cage assembly are collapsible for running in and pulling out of hole. Themechanical section of this type of flowmeter is interchangeable with HADES CFS flowmeters.

This manual covers the mechanical spinner section only.

For an overview of the HADES toolstring and its components, refer to the overview manual, seeSection 1.5.

1.1 OPERATING PRINCIPLE

The flowmeter is closed while running in hole, opening automatically when it leaves the tubing andenters the larger diameter of the casing. Should a restriction be encountered during logging, theflowmeter will close and fold the spinner until the restriction is passed, thus avoiding damage to theblades.

The spinner runs on precision bearings. Rotation is sensed by Reed switches, which eliminate dragand optimise measurement of very low flow rates. The normal output is 10 pulses per revolutionwith indication of direction.

1.2 APPLICATIONS OF THE CTF

Fluid composition from average dielectric constant. Fluid ID from temperature response. Location of leaks and crossflow by temperature response. Quantitative measurement of flowrate in casing and tubing.

1.3 INTERFACING & TOOL COMBINATIONS

Bottom tool in string. Interchangeable with CFS Mechanical Section (CFSM26, 27, 34 or 35). Requires CTF and HCT, see Section 1.5. Simultaneous operation with other HADES Tools. 13/16 UN 12tpi Gearhart Monoconductor Head.This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 1-1

Caged Fullbore Flowmeter CFBM36Chapter 1. Description1.4 SPECIFICATION

Note: For the Electronics specification, refer to the relevant CTF Manual, see Section 1.5.

1.5 ASSOCIATED DOCUMENTS

Refer to the following manuals for additional information about the Electronics and CTF:

Parameter Specification Remarks

Output 10 pulses/revolution with flow indication

Max. Pressure see CTF Manual

Max. Temperature see CTF Manual

Casing Diameter 41/2 to 95/8 (114mm to 245mm)Make-up Lengtha

a. Based on closed tool. The tool length and measure point decrease when the tool length increases. Maximumtravel between fully open and fully closed is approx. 1.

Approx. 23.52 (597.41mm)Overall Length Approx. 25.8 (655.32mm)Measure Pointa. 13.20 (335.28mm) From Bottom of toolTool Closing Diameters 111/16 (43mm)Weight Approx 10lbs (4.5kg)

Materials NACE Specification

Apparent Treshold Approx. 1.7 feet/minute

Temperature HADES Overview CTF Manual

260C MN-HADES001+2 MN-CTF010

300C MN-HADES003+4 MN-CTF008This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 1-2

Caged Fullbore Flowmeter CFBM36Chapter 2. Safety2 SAFETY

Note: The safety guidelines in this section are to be used in addition to, not instead of, the guidelines inthe overview manual. Refer to the Overview manual for more information (see Section 1.5).

2.1 GENERAL

The following sections highlight some specific safety points related to HADES tools. Whenoperating or handling the tools all appropriate safety precautions, use of personal protectiveequipment and working practices should be followed in accordance with your local/nationallegislation or company guidelines.

2.2 SAFETY OF PERSONNEL

In the event of a tool failure, it may be possible for high pressure well fluids to become trappedinside the tool. Additionally a tool that is still at high temperature may contain hot air.

All HADES tool joints are furnished with a small 'weep hole' for bleeding pressure. Always orient theweep hole away from personnel while unscrewing the tool joint. As the joint is unscrewed, trappedfluids will tend to exit via the weep hole. As with most systems, a tool joint that is difficult to unscrewmay be an indication of trapped pressure and should be treated with extreme caution.

If maintenance is being performed on internal assemblies (e.g. CTF pressure barrier or quartzgauge buffer tube), all caution must be exercised in consideration with the history of the individualtool as pressure may be trapped inside.

Warning!HOT WORK! Sondex equipment may, under certain circumstances or failure modes, become a potential source of ignition. Using it must therefore be considered "HOT WORK" and appropriate precautionary procedures should be followed when testing at surface in areas where there is a risk of gas leaks or other potentially explosive atmospheres.

Warning! HOT PARTS - DANGER OF BURNING! Ensure that the tool is completely coolbefore starting disassembly. Wear heat protective gloves when handling a hot tool.

Warning! TRAPPED PRESSURE! In the event of a tool failure it may be possible for highpressure well fluids to become trapped inside the tool.

Warning!If it is suspected that the trapped fluids may contain Hydrogen Sulphide (H2S) gas, ensure appropriate breathing apparatus, detection equipment and safety policies are employed before disassembling the tool.

Warning! Take care when opening the arms of the tool, as the the arms act as springs whenopened. The arms may open rapidly due to the spring force without warning.

High Temperature Grease

A High Temperature Grease (Biral NMG) is used to fill the Spring Housings of the tool duringmaintenance. Contact with skin or eyes can be harmful.

For more details see the Material Safety Data Sheet for Biral NMG.This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 2-1

Caged Fullbore Flowmeter CFBM36Chapter 2. Safety2.3 SAFETY OF EQUIPMENT

Caution! CTF is not pressure tight, unless a mechanical spinner section is fitted.

Caution!Seal Degradation - Although the O-Ring seals recommended and/or supplied for use on the HADES system can withstand extremes of temperature and pres-sure, external (wet) O-Rings must be changed for each run in the well. Failure to do so may result in catastrophic tool flooding.This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 2-2

This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005

Caged Fullbore Flowmeter CFBM36Chapter 3. Theory Of Operation

3-1

3 THEORY OF OPERATION

3.1 DESCRIPTION

3.1.1 SPINNER SECTION

The spinner section contains:

Centraliser mechanism including arms, main shaft, spring housing and bottom nose. Shaft assembly comprising shaft, magnet assembly and bearings. Spinner blade assembly.

The CFBM36 flowmeter incorporates a 6-arm bow-spring centraliser. The spinner is mounted onthe end of a shaft. This shaft passes through a bearing into an oil filled chamber. The 2-pole magnetattached to the shaft rotate inside this chamber.

Magnets at the top end of the spinner shaft rotate inside the oil filled Sensor Assembly. The field ofthe rotating magnets is sensed by Reed switches outside a cylindrical non-magnetic pressure bar-rier, placed around the magnets. The Reed switches are integrated circuits, whose output isswitched to ground when the magnetic field passes a certain threshold, thus creating a pulse eachtime a magnet passes it. The 2-pole magnets and 5 Reed switches produce 10 pulses per revolu-tion. The operating sequence of the Reed switches is used to determine flow direction.

Since the overall CFB design allows the spinner to occupy a large cross section of the flow, a lowertool joint has not been allowed for.

The flowmeter is closed while running in hole, opening automatically when it leaves the tubing andenters the larger diameter of the casing. Should a restriction be encountered during logging, theflowmeter will close and fold the spinner until the restriction is passed, thus avoiding damage to theblades.

The closing arms are supplied for the minimum i.d. of the casing, but will centre the tool over arange of diameters slightly greater than this.

The Mechanical Assembly can be used in combination with both Memory and Ultrawire Electronics.For further description, refer to Section 1.5 for the relevant overview manual.

3.1.2 ELECTRONICS SECTION

The flowmeter electronics are contained within in the central flasked section of the HADEStoolstring, refer to Section 1.5.

3.1.3 SENSOR SECTION

The sensor assembly is contained in the Capacitance, Temperature, Flowmeter section, refer toSection 1.5 for the relevant CTF Manual.

Caged Fullbore Flowmeter CFBM36Chapter 4. Operating Procedure4 OPERATING PROCEDURE

4.1 PRE-LOGGING CHECKS

See also Section 6 Extended Checks.

4.1.1 MECHANICAL

Ref.: CFBM36 General Assembly 09540

For CTF Pre-logging checks, refer to the relevant CTF manual (see Section 1.5).

NOTE: Oil leaks out during logging to lubricate the bearings. This chamber must be filled before everylogging operation. A low viscosity oil ensures minimum drag, but if too low it will leak out too quickly.

This is essential before logging to ensure bearing lubrication. The choice of oil depends on theexpected operating temperature.

1 Lift the bent end of the Locking Spring on the CTF to unscrew the ring, which will releasethe Sensor body. Take care not to damage the Magnet Assembly (item 21) or Shaft (item9) when pulling off the Sensor body.

2 Check that the O-rings are clean and lubricated with silicone oil 200/5000cS. Do not usesilicone grease. Replace O-rings if damaged.

3 Clean the tool thoroughly with diesel, removing wax, scale or sand, which may impairproper functioning of the tool. Flush the bearings in the sensor section.

4 Ensure the opening and closing section is lubricated.

5 Check the magnet assembly (item 21) for damage or debris. Replace if damaged.

Note: When iron scrapings are visible on the magnet assembly, clean the assembly with a light oil. Checkfor damage. If the assembly is not damaged, no replacement is required.

Check the mechanical functioning of the tool:

Blow the spinner in both directions to ensure the spinner runs smooth and is balanced.

Open the assembly slowly and ensure the tool opens smoothly. Check that the spinner does not stop suddenly, which would indicate the presence of

dirt in one of the bearings. With the tool horizontal, check that the spinner is balanced. Check that the axis of rotation does not move, which would indicate a bent shaft.

6 Lubricate the bearings with a light oil (not WD-40 as it is too thin and leaves a tacky filmon the bearing surfaces after drying). If the bearings do not rotate freely they must bereplaced.

7 Before logging the tool must be filled with Biral NMG, using the grease nipple. Checkspring body is pumped full of grease.

8 Ensure the tool is closed when running in the hole. This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 4-1

Caged Fullbore Flowmeter CFBM36Chapter 4. Operating Procedure

For Electrical and Operating Pre-logging Checks, refer to the relevant manual (see Section 1.5).

4.2 CALIBRATION

The operating procedure in the well allows the flowmeter to be calibrated by recording severalpasses at different logging speeds. Plots of logging speed versus tool reading enable the apparentfluid velocity (Vapp) to be determined.

The more linear the tool response, the more accurate is the velocity determination. Non-linearity offor example bearing friction and viscosity, can be accounted for in the above plots. The plots alsocompensate for the alteration to flow velocity due to the insertion of the toolstring. Sondexflowmeters are linear over their full operating range under normal well conditions. Sensitivity of CFBtools is often less in downflow due to the shielding effect of the toolstring.

The Caged Fullbore spinner tool is designed primarily for logging low fluid velocities in largediameter pipe. At high fluid velocities past the CFB spinner, the slope of the spinner response tendsto be less. For best accuracy therefore the fluid velocity should not be much larger than the cablespeed with which the Caged FullBore spinner can be logged.

For Calibration, refer to the relevant CTF manual (see Section 1.5).

4.3 CONNECTING TO TOOLSTRING

The flowmeter must be placed at the lower end of the toolstring. There is no lower tool joint, hencenothing can be fitted below. Refer to the HADES overview manual (see Section 1.5) for the make-up of the HADES toolstring.

A centraliser is desirable higher up the string to prevent tilting. This applies to all spinner flowme-ters, including the CFBM even though the CFB tool incorporates a centraliser, as its arms will notsupport the weight of a full production logging tool.

For use in deviated wells, enough centralisers should be used so that they can lift the toolstringfrom a horizontal surface in air. If length permits, it is preferable to use more standard strength cen-tralisers rather than a few strongly centred ones.

Also refer to the relevant CTF manual (see Section 1.5).

4.4 LOGGING

For logging, refer to the guidelines in the relevant CTF manual (see Section 1.5).

4.5 POST LOGGING DISASSEMBLY


4.5.1 GENERAL

1 Ensure that well fluid does not reach the upper electrical connector.

2 Fit new Bearings (2x item 36), and lubricate with a light oil prior to storage (not WD-40 asit is too thin and leaves a tacky film on the bearing surfaces after drying). Alternatively, thebearings can be flushed, see Section 4.5.2.This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 4-2

CFBM36Caged Fullbore Flowmeter Chapter 4. Operating ProcedureNote: Sondex recommends replacing the radial bearings every run where possible. If this is not possible,

they should be washed through with solvent, e.g. kerosene, and kept lubricated with a light oil.

3 Lubricate the 2 O-rings on the Sensor Assembly and the O-ring (item 40) in the Mechani-cal Assembly with silicone oil 200/5000cS before reassembling and storing the tool. Donot use silicone grease.

4 Clean the tool before the toolstring is disassembled.

5 Refit upper thread protector.

For CTF Post Logging Checks, refer to the relevant CTF manual (see Section 1.5).

4.5.2 FLUSHING


Bearings should be flushed with a solvent after logging. Flushing the bearings is possible prior tochecking tool function. However, Sondex recommend that a pair of new bearings is fittedbefore the next logging job. Refer to Section 5 for removal of old bearings.

1 It is not necessary to separate the CFBM from CTF section.

2 Lift the bent end of the Locking Spring on the Sensor Section to unscrew the ring, whichwhich will release the Sensor body. Take care when pulling off the Sensor body so as notto damage the Magnet Assembly (item 21) or Shaft (item 9).

3 Hold the Sensor body vertically and pour petrol or other solvent down the shaft past thebearings. Ensure that the spinner rotates freely.

4 Allow solvent to evaporate and lubricate bearings with a light oil.

4.6 TRANSPORT, HANDLING & STORAGE

If the spinner is not attached to a CTF, store with end thread lightly greased and the upper watertight thread protector fitted.

Do not subject tool to extreme shock such as dropping or hitting with a hard object.This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 4-3

Caged Fullbore Flowmeter CFBM36Chapter 5. Mechanical Description5 MECHANICAL DESCRIPTION

Note: Refer to the relevant manual of the Electronics section (see Section 1.5) for item numbers on thesensor assembly.

If a CTF is fitted, remove as described in Section 4.1.1.

5.1 DISASSEMBLY

Ref.: CFBM36 General Assembly 09540CTF Manual See Section 1.5.

5.1.1 REMOVAL OF UPPER BEARING

1 Unscrew the Spring Retaining Nut (item 13) below the spinner clockwise until it ispossible to push out the small Pin (item 43) through the threaded Shaft (item 11).

2 Unscrew the Spring Retaining Nut (item 13).

3 Withdraw the Spinner Blade Assembly (item 12) from the lower threaded Shaft (item 11).

NOTE: Spinner Blades can be replaced as a complete assembly. Replacement of individual blades is notrecommended.

4 Rotate the spinner Shaft (item 9) until one of the Grub Screws (item 41) lines up with theaccess hole in the Adaptor (item 3).

5 Loosen or remove this grub screw through the hole, followed by the other Grub Screws(item 41). The magnet holder (item 21) and Bearing Spacer (item 22) can now beremoved from the Shaft (item 6).

6 Slide the Shaft downwards approximately 2, and push back up to push out the upperBearing (item 36) from the Housing (item 3). Once done, extract the Shaft downwardsbetween the centraliser arms. Handle shaft with great care as it must not be bent.

Warning!If a tool joint is broken for any reason, particularly after exposure to temperature, the O-ring seal (item 40) must be replaced.This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 5-1

Caged Fullbore Flowmeter CFBM36Chapter 5. Mechanical Description

5.1.2 REMOVAL OF LOWER BEARING

There are two possible ways to do this.

The Preferred Method

1 Turn Lower Threaded Shaft (item 11) relative to the Bearing Retainer (item 10) until thehead of the Grub Screw (item 38) can be seen through the access hole of the BearingRetainer when the hole is opposite the U-shaped cutout of the Lower Shaft.

The mushroom shaped Bearing Retainer (item 10) can be unscrewed from the spinner Shaft(item 11) . This is a tight fit by design and may therefore be quite stiff. If it becomes more stiff afterjust a few turns, check the Grub Screw (item 38) has been sufficiently loosened.

The Alternative Method

1 Disassemble the Knuckle Joint (items 10 & 11), using a pair of needle nose pliers to lift theend of Spring (item 32) out of the U-shaped cutout. The spring can be unscrewed inorder to remove it. This gives good access to the Grub Screw (item 38), which holds theBearing Retainer (item 10) and it can now be removed.

Note: This method is not recommended, only use if absolutely necessary.

2 The lower Bearing (item 36) can now be removed.

5.1.3 O-RINGS

To gain access to the O-ring (item 40), the Housing Shaft (item 9) must be removed from the mainShaft (item 6).

2 Unscrew the grub screw(item 38), using an Allen Key,whilst allowing the Spring(item 32) to be pushed upwardsout of its way.

Unscrew the grub screw until itshead is just proud of the outerdiameter of the Spring, thuspreventing the Bearing Retainerfrom rotating in the Lower Shaft. This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 5-2

Caged Fullbore Flowmeter CFBM36Chapter 5. Mechanical Description5.2 REASSEMBLY


Note: See Section 6.2 Extraordinary Maintenance for additional maintenance procedures beforecommencing the reassembly procedure.

1 Refit the Housing Shaft (item 9) to the main Shaft (item 6).

2 Refit the mushroom shaped Bearing Retainer (item 10) to the Spinner Shaft (item 11).

Note: Lubricate the lower bearing with a light oil (Not WD-40).

3 Fit the Lower Spinner Shaft (item 9) to the Bearing Retainer (item 10) and secure with theGrub Screw (item 38).

4 Clean and grease O-ring seals using silicone grease. O-ring (item 40) is environmentalonly and not a pressure seal, but should be replaced if damaged.

5 Re-install the Main Shaft (item 6) into the Housing (item 3) and secure with the GrubScrews (item 41).

Note: Take care not to damage the O-ring (item 40).

6 Refit the Upper Bearing (item 36)1, Magnet Holder (item 21) and Bearing Spacer (item 22)to the Main Shaft (item 6) and secure with 2x Grub Screws (item 38).

7 Refit Spinner (item 12), Compression Spring (item 42) and Spinner Nose (item 13).Secure with Retaining Pin (item 43).

8 Check that there is an end float of 0.01 (0.25mm) on the spinner shaft. Adjust the endfloat with the Lower Bearing if required.

1. Lubricate with a light oil. (Not WD-40)

Warning!When the magnet holder has been screwed on there must be an end float of about 0.5mm to allow for thermal expansion of the body relative to the main shaft. If not, the bearings will stick at high temperature under end load and may be permanently damaged.This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 5-3

Caged Fullbore Flowmeter CFBM36Chapter 6. Extended Checks

6 EXTENDED CHECKS

See also: APPENDIX B Drawings & Parts Lists

6.1 PREVENTATIVE MAINTENANCE

6.1.1 GREASE & LUBRICANTS

Correct use of grease and lubricants is essential to the maintenance of all Sondex downholeequipment.

NOTE: All mating threads are made in anti gauling materials. NO GREASE IS REQUIRED.

Threads should be kept clean and dry, no grease.

O-rings should be lightly coated with silicone oil 200/5000cS. Do not use silicone grease.

Cavities, e.g. spring housings, should be filled with a suitable heavy high melting point grease, suchas Biral NMG.

6.1.2 MECHANICAL

1 Remove dirt from pressure housing threads and O-rings.

2 Inspect O-rings for damage or ageing/hardening and replace where required, see alsoSection 6.2.

3 Check for:

Damaged components. Loose screws/nuts/components/connectors.

Note: If RTV or similar compound is used to secure loose components, it must be fully cured beforehousing is replaced.

Heat or chemical damage (discoloured components).

4 Check connectors for cleanliness and loose/bent pins before replacing.

5 Check all fixings for tightness.

6 Check grub screws are tight.

Warning!The use of certain greases, such as some types of Lubriplate, can cause electricalfailure if they have any volatile content, which can burn off producing corrosivegasses inside the tool.This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 6-1

Caged Fullbore Flowmeter CFBM36Chapter 6. Extended Checks6.2 EXTRAORDINARY MAINTENANCE


1 Inspect the following components for damage and replace if necessary:

1x item 12. 1x item 9. All pins, pivots and bushes.

2 Clean and lubricate O-ring seals using silicone oil 200/5000cS. Do not use siliconegrease. O-ring (item 40) is environmental only and not a pressure seal, but should bereplaced if damaged.

3 When reassembled, the spinner should rotate freely in both directions when in a gentle airflow. Check that the spinner does not stop suddenly, which would indicate the presence ofdirt in one of the bearing and consequently an unacceptably poor threshold to flow. Withthe tool horizontal, check that the spinner is balanced. Also check that the axis of rotationdoes not move which would indicate a bent shaft.

NOTE: The spinner hub and blades are supplied as a carefully fitted assembly. It is not practical to supplyand fit individual blades.

4 When fully reassembled, check that the shaft (item 6) is fully screwed into the adapter(item 3) above it and locked with the three grub screws (item 41). Access to the three grubscrews is through the holes in the end cap (item 4).

5 Check that there is an end float of 0.01 (0.025mm) on the spinner shaft. Adjust the endfloat with the Lower Bearing if required.

If the tool experiences H2S gas or temperatures above 150C, the following O-ring must bereplaced:

1x item 40.

Amongst others, the following parts will change colour from Bronze to Black when in contact withH2S:

End Cap (item 4). Centraliser Body (item 5).

Note: Only a small selection of Al/Bronze Parts is shown.

See Section 1.5 for the CTF Manual, regarding maintenance on the remainder of the tool.

Warning!When the magnet holder has been screwed on there must be an end float of about 0.5mm to allow for thermal expansion of the body relative to the main shaft. If not, the bearings will stick at high temperature under end load and may be permanently damaged.This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 6-2

Caged Fullbore Flowmeter CFBM36Chapter 6. Extended Checks6.3 TROUBLESHOOTING

Refer to Section 5.1 where necessary.

NOTE: All Troubleshooting items is applicable to the CFBM section only. Refer to the relevant CTF manualfor Electrical Troubleshooting (see Section 1.5).

Damaged O-rings. Visually inspect O-rings. Check that the O-rings are clean andgreased. Replace the O-rings if the following occurs:

Cracks or tears in the O-rings. The O-rings will have an excessive size when taken

out of the hole (due to moisture intake). The tool experiences temperatures in excess of

150C. The Al/Bronze parts in the tool changed colour from

bronze to black, meaning the tool experienced contact with H2S gas.

Damaged Magnets. Visually inspect the magnets and replace when necessary if:

Data is spiked. Irregular count rate or missed counts are noticed. Magnets are damaged (e.g. chipped).

Arms not closing properly.

Check that the maximum diameter if the spinner does not exceedthe maximum diameter of the tool. If so, replace the arms.

Spinner does not open completely when downhole.

Check the spinner dimensions:

If the blades of the spinner extend more than the arms in open position, either the spinner is too big or the arms are too small. Correct, taking the Casing dimensions into account.

Spinner does not rotate smoothly or does not rotate at all.

If the spinner is unbalanced.

Ensure the bearings are clean and the bearings are not damaged. Replace if necessary.

If the spinner doesnt appear to be balanced. Replace or contact Sondex for alternative options.

Check the spinner dimensions and replace if necessary.

Ensure the shaft is not bent. Replace if necessary.This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 6-3

Caged Fullbore Flowmeter CFBM36APPENDIX A. Equipment & Recommended Spares

This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 A-1

APPENDIX A EQUIPMENT & RECOMMENDED SPARES

See overview manual for details of hand tools and spares kits, refer to Section 1.5.

Item Part no. Description Qty Remarks1 CFBM36 CTF Type Caged Fullbore Flowmeter,

NACE 1

Caged Fullbore Flowmeter CFBM36APPENDIX B. Drawings & Parts ListsAPPENDIX B DRAWINGS & PARTS LISTS

Description Drawing Parts List

CFBM36 General Assembly 09540-PT3 09540-PT3This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 B-1

Caged Fullbore Flowmeter CFBM36APPENDIX B. Drawings & Parts ListsChecked:Drawn:

PARTS LISTING

Date: Date:

Approved:

Date:

Description:

Part: Issue:

09540

Assy Springbow CFB(M)1 11/16 x 4 1/2 (CTF Type) - NACE

PT3NGH KRC KRC

09/04/200309/04/200302/07/2002

Iss Date Remarks Chkd Appr Documents

RELATED DOCUMENTSCHANGE HISTORY

Issue Notes#

PT1 09/04/2003 Initial Release KRCKRC

PT2 24/10/2003 Parts Changed to Move Magnets KRCKRC

PT3 23/01/2004 NEW MAGNET ASSY INTRODUCED KRCKRC

PARTS LIST

RemarksItem Part No. Issue Description UnitsQty Component Value

001

002

003 F Housing Adaptor (MkII) 1-11/16 CTF to 1-11/16 CFB 1 ea14682

004 J End Cap, Body 1 ea00506

005 C Body Centraliser 1 11/16 1 ea05101

006 B Shaft, Main, 1 11/16 x 5 Inch 1 ea01851

007 A Link Arm 4 1/2 6 ea05132

008 A Housing Spinner Closing, 4 1/2, 5, 5 1/2 1 ea05117

009 C Shaft, Spinner, Upper, (4 1/2, 3, 5 & 5 1/2 Inch) 1 ea01853

010 G Mushroom 1 ea01810

011 B Shaft, Spinner, Lower (4 1/2, 5 & 5 1/2 Inch) 1 ea01857

012 A Assy, Spinner, 1 11/16 x 4 1/2 Inch 1 ea01872

013 PT1 Nose, Spinner, CFB - NACE 1 ea16042

014 PT1 Assy, Spring-Bow (Type A) 4-1/2, 5, 5-1/2 3 ea05150

015 A Assy Pivot Arm, Springbow, 1 11/16 Tools 3 ea05137

016

017

018 PT1 Assy, Spring-Bow (Type B) 4-1/2, 5, 5-1/2 3 ea05152

019 B Nose Lower 6 Arm 1 ea05107

020

021 PT1 Assy, Magnet Holder 1 ea20205

022 A Spacer, Magnet Assy 1 ea13218

023

024 A Collar Spring 1 ea05112

025 C Pin Collar PRC 1 ea00513

026

027

028

029 - Pin, Spirol, 3/16 x 7/8 LG, St/Steel NACE 3 ea93599

030

031

032 - Spring Compression NACE 0.360(OD) x 0.438(FL) 62.5(lb/in) 1 ea91112

033This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 B-3

Caged Fullbore Flowmeter CFBM36APPENDIX B. Drawings & Parts ListsChecked:Drawn:

PARTS LISTING

Date: Date:

Approved:

Date:

Description:

Part: Issue:

09540

Assy Springbow CFB(M)1 11/16 x 4 1/2 (CTF Type) - NACE

PT3NGH KRC KRC

09/04/200309/04/200302/07/2002

PARTS LIST

Item Part No. Issue Description Qty Units RemarksComponent Value

034

035

036 - Bearing Ball, Radial 9mm OD 2 001155

037 - Spring Compression NACE 1.150(OD) x 2.500(FL) 133.0lb/in 1 ea91114

038 A Screw, Grub Skt Hd, M3 (Modified) 3 ea01856

039

040 - O'Ring, high temp, size 012 1 ea110012

041 A Screw, Grub Skt Hd, M5 x 08mm Lg, St/Steel 3 ea01038

042 - Spring Compression NACE 0.365(OD) x 2.000(FL) 8.7(lb/in) 1 ea91111

043 A Retaining Pin, Spinner Nose 1 ea01837

044 - Pin, Spirol, 2'5 x 18mm LG, St/Steel NACE 3 ea93600

045 - Pin, Spirol, 3 x 18mm LG, St/Steel NACE 3 ea93601

046 - Pin, Spirol, 2'5 x 16mm LG, St/Steel NACE 9 ea93602

047 - Pin, Spirol, 3 x 12mm LG, St/Steel NACE 6 ea93603

048 - Screw, Grub Skt Hd, M6 x 6mm Long, St/Steel 1 ea01030

049 - Spring Torsion NACE (16023 Alternative) 1 ea91480

050 B Protector Thread 1 ea10167

(AR = As Required) This document contains proprietary information. Copyright 2005 Sondex. All rights reserved.Document: MN-CFBM36-C Created November 11, 2005 B-4

Title PageContents0 About This Manual0.1 Manual History0.2 Updates To Be Used With This Manual0.3 Technical Help0.4 Feedback

1 Description1.1 Operating Principle1.2 Applications Of The CTF1.3 Interfacing & Tool Combinations1.4 Specification1.5 Associated Documents

2 Safety2.1 General2.2 Safety of Personnel2.3 Safety of Equipment

3 Theory Of Operation3.1 Description3.1.1 Spinner Section3.1.2 Electronics Section3.1.3 Sensor Section

4 Operating Procedure4.1 Pre-logging Checks4.1.1 Mechanical

4.2 Calibration4.3 Connecting To Toolstring4.4 Logging4.5 Post Logging Disassembly4.5.1 General4.5.2 Flushing

4.6 Transport, Handling & Storage

5 Mechanical Description5.1 Disassembly5.1.1 Removal Of Upper Bearing5.1.2 Removal Of Lower Bearing5.1.3 O-rings

5.2 Reassembly

6 Extended Checks6.1 Preventative Maintenance6.1.1 Grease & Lubricants6.1.2 Mechanical

6.2 Extraordinary Maintenance6.3 Troubleshooting

APPENDIX A Equipment & Recommended SparesAPPENDIX B Drawings & Parts Lists

MN-CFBM36

Documents

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