Cosasco RBS Guide

COSASCO
®
RBS/RBSA RETRIEVER
MAINTENANCE
Work Instruction
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Cosasco® RBS/RBSA Retriever Maintenance Work Instruction
P/N: 741031revH
Scheduled Review Date: July 2018
Page: 2 of 46
Date: 26/06/2017
Note: Please ensure you have the latest revision of this document by downloading it from our website or by contacting Cosasco Customer Service.
Revision History Record
Page
No.
Rev Date Description of Change Issue Reviewed Approved
- 10/02/12 Initial Release KR ENG RA
5 A 04/11/13 Added Disclaimer Notes KR ENG RA
2,7 B 08/01/13 Updated Scope of Document, added Revision
History
KR ENG RA
ALL C 01/30/14 Annual Review KR ENG RA
ALL D 01/25/15 Annual Review KR ENG RA
ALL E 03/25/15 Added note on footer about latest revision KR ENG RA
ALL F 12/15/15 Annual Review/Update Cover and Name to
Cosasco Throughout Document.
KR ENG RA
ALL G 12/15/16 Annual Review KR ENG RA
ALL H 26/06/17 Annual Review JT JL DS

Cosasco® RBS/RBSA Retriever Maintenance Work Instruction
P/N: 741031revH
Scheduled Review Date: July 2018
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Cosasco® is a registered trademarks of Rohrback Cosasco Systems, Inc.
No part of this work instruction may be reproduced or transmitted in any form or by any
means, electronic or mechanical, including photocopying and recording, for any purpose,
without the express written permission of Rohrback Cosasco Systems, Inc.

Cosasco® RBS/RBSA Retriever Maintenance Work Instruction
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CONTENTS
Page No
1 Important instructions ......................................................................................... 5
2 Disclaimer ............................................................................................................ 6
3 Safety warnings ................................................................................................... 7
4 Scope of Document ............................................................................................. 8
5 RBS/RBSA Retriever Maintenance .................................................................... 8
5.1 Sour Gas Service .................................................................................................... 9
5.2 Cleaning and Lubricating Without Disassembly ....................................................... 9
5.3 Retriever Disassembly........................................................................................... 11
5.4 Retriever Assembly ............................................................................................... 26
6 Servicing & Pressure Testing Of Retrieval Equipment ................................ 41
6.1 Pressure Testing ................................................................................................... 41
6.2 Pressure Testing Procedure .................................................................................. 43

Cosasco® RBS/RBSA Retriever Maintenance Work Instruction
P/N: 741031revH
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1 IMPORTANT INSTRUCTIONS
Cosasco is committed to providing the safest and highest quality products, services, and
training for the industries it serves. We are committed to ensuring that all users of our
equipment work safely and efficiently. We have designed this work instruction to emphasize
safe working practices, and as much as possible, to convey the full benefit of our knowledge
and collective experience in the maintenance and service of the Cosasco RBS/RBSA
Retriever. This work instruction is not meant to be a sole source of instruction or training.
Because these tools are used in a broad range of environments and applications, it is
important that the owner and operation personnel have been assessed, certified, and deemed
competent in all safety, work management and additional risk assessment requirements in the
application of this procedure.
WARNING
Installing, operating or maintaining a Cosasco high pressure retrieval tool
improperly could lead to serious injury or death from a surge of pressure
into the Retriever during retrieval (causing pistoning). Comply with all
information on the product, in this work instruction, and in Cosasco
System Safety Awareness Training that apply to the product. Do not allow
untrained or inexperienced personnel to work with this product. Use
Cosasco parts and work procedures specified in this work instruction.
BE SURE ALL PERSONNEL READ AND FOLLOW THE INSTRUCTIONS
IN THIS WORK INSTRUCTION AND ALL PRODUCT WARNINGS.
Product Owners (Purchasers)
1. Use the correct product for the environment and pressures present. If you are unsure,
discuss your needs with your Cosasco representative.
2. Inform, educate, and train all personnel in the proper installation, operation, and
maintenance of this product.
3. To ensure proper performance, only competent, field experienced and trained
personnel should install, operate, repair and maintain this product.
4. Save this work instruction for future reference.
Product Operation Personnel (Personnel):
1. Read and understand all instructions and operating procedures for this product.
2. Follow all warnings, cautions, and notices marked on, and supplied with, this product.

Cosasco® RBS/RBSA Retriever Maintenance Work Instruction
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3. Follow all instructions during the installation, operation, and maintenance of this
product.
4. To prevent personal injury, ensure that all components are in place prior to and during
operation of the product.
5. If you do not understand an instruction, or do not feel comfortable following the
instructions, contact a Cosasco service technician for clarification or assistance.
6. If this work instruction is not correct for your Cosasco product, contact your regional
Cosasco office and Cosasco will provide you with the requested work instruction.
7. Use only replacement parts specified by Cosasco. Unauthorized parts and procedures
can affect this product’s performance, safety, and invalidate the warranty. “Look-a-like”
substitutions may result in improper operation and may result in serious injury or
death.
8. Save this work instruction for future reference.
2 DISCLAIMER
This disclaimer relates to the use of these work instructions by non-Cosasco persons and
entities.
Any person or organization utilizing this work instruction, for any purpose, does so at their own
risk. Rohrback Cosasco Systems, Inc., its affiliates and employees assume no liability arising
from the use of, or reliance on the information provided in any Cosasco work instructions.
Information provided in this work instruction should not be considered as all-encompassing or
suitable for all situations, conditions or environments. Each individual and the organization he
or she represents are responsible for implementing their own program of training and safety
awareness in connection with this work instruction.
Application of information furnished by this work instruction does not guarantee that the
information furnished will meet applicable USA (including OSHA), United Kingdom, or any
other country’s health or safety standards or requirements or, that by implementing any of the
programs you or your company will comply with such rules and regulations. Always seek the
advice of your legal, medical or other advisors before using this information.

Cosasco® RBS/RBSA Retriever Maintenance Work Instruction
P/N: 741031revH
Scheduled Review Date: July 2018
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3 SAFETY WARNINGS
1. Safe operation requires two experienced and competent operators.
2. Do not use this retrieval equipment unless you have been trained and are competent
in its safe operation.
3. If it has been longer than 90 days since your last operation, you should review the
work instruction and complete an operation on a pressurized test rig.
4. Ensure all Retrieval Equipment is in good working order and has been tested in line
with Section 6.1 of this work instruction
5. Make sure you have complied with all plant safety requirements and environmental
regulations.
6. Identify the type of media its pressure and temperature. Review material safety data
information on the media prior to operation.
7. Ensure you have all the required safety equipment for the given media, "i.e. hard hat,
safety glasses, protective clothing, safety gloves, respirator, spill safety equipment,
etc...
8. Any actions which could vary system pressure such as surges caused by opening and
closing of valves and chokes must be delayed until completion of retrieval operations.
9. Insure you have enough clearance for safe operation. Note wind direction prior to
starting operations involving hazardous products.
10. Warning: Surface temperature may be hot. Contact may cause burn.
11. Warning: Do not exceed equipment specified pressure rating. Over-pressurization can
cause equipment to fail/burst posing a variety of safety hazards.
12. Warning: Be sure to introduce pressure gradually into the tooling by opening the
appropriate valve slowly. This safety measure is taken to prevent pistoning.
UNCONTROLLED PISTONING MAY CAUSE SERIOUS INJURY OR DEATH!
13. Warning: Do not apply a load of more than 150 pounds, perpendicular to the Retriever
body axis, to prevent breakage from bending stresses.
WARNING
It is imperative that the following safety warnings are taken into important
consideration before and during use of Retrieval Equipment. Failure to
follow these warnings could result in serious injury or death.

Cosasco® RBS/RBSA Retriever Maintenance Work Instruction
P/N: 741031revH
Scheduled Review Date: July 2018
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4 SCOPE OF DOCUMENT
This document details the procedure for the maintenance of Cosasco RBS/RBSA Retrieval
Tool.
This document is not to be used as a training manual in the use of the fore mentioned
equipment and is intended for use by Cosasco trained and qualified personnel or service
personnel of clients who have been assessed, certified, and deemed competent in all safety,
work management and additional risk assessment requirements in the application of this
procedure. The lead technician is responsible for the strict adherence to this work instruction.
5 RBS/RBSA RETRIEVER MAINTENANCE
The standard RBSA Retrieval tool features a stainless steel outer barrel, Viton o-rings, Teflon
back-up rings, and graphite-impregnated Teflon dynamic seals. They are pressure rated to
2500 psi (172 BAR) and have a maximum operating temperature of +400°F (+204°C) and
meets NACE MR0175 and MR0103 standards.
The standard RBS Retrieval tool features a stainless steel outer barrel, Viton O-rings and
graphite impregnated Teflon seals. They are pressure rated up to 6000 psi (413 bar) and have
a maximum operating temperature of +450 F (+232 C) and meets NACE MR0175 and
MR0103 standards. The Retriever has four main parts as displayed below: Inner and outer
barrel, mandrel and socket adapter assembly.
Inner Barrel
Outer Barrel
Socket Adapter
Assembly
Pressure
Gauge Bleed Valve
Hammer Nut
Handle
Assembly
Outer
Barrell
Mandrel
Rod

Cosasco® RBS/RBSA Retriever Maintenance Work Instruction
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Scheduled Review Date: July 2018
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The maintenance interval required by either the RBSA or RBS retriever will vary depending
upon the service to which it is subjected. Certain fluids will wash out all lubricant from the
retriever after one retrieval; others will deposit debris in the retriever making operation difficult.
If the retriever has been in use and it is anticipated not being used again for a period longer
than one day, it should be completely disassembled, cleaned and lubricated. Also, if in a days
operation (because of adverse retrieval environment conditions) the retriever becomes difficult
to operate, feels gritty and does not stroke or turn easily, it should first be cleaned and
lubricated without disassembly as indicated in Part 5.2 below. If cleaning and lubricating
without disassembly does not relieve the difficulties in the retriever operation, it should be
completely disassembled, cleaned and lubricated as indicated in either Part 5.3 or 5.4 of this
Section.
Lubricant choices are many. For a particular service, some experimentation may be
necessary. Recommended lubricants are:
1. Motor Oil - (SAE 30 weight or equivalent).
2. Lubriplate (multi-purpose) - A lithium base grease; usually the best choice for
most service since it is thin and applies easily. Use for service temperatures of
0° to +350°F (-18° to +177°C). Available as Cosasco 129372.
3. Synthetic lubricant - A molybdenum disulfide grease containing rust and oxidation
inhibitors. It is recommended for use in extreme pressures and temperatures (-40°
to +600°F, -40° to +316°C). Available as Cosasco 201688.
5.1 Sour Gas Service
On both the RBS and RBSA retrievers, applicable materials comply with the requirements of
NACE standard MR0175, "Sulfide Stress Cracking Resistant Metallic Materials for Oil Field
Equipment." As stated in this standard. "Materials ... are resistant to, but not necessarily
immune to (sulfide stress cracking) under all service conditions." Thus, when the retriever is
used in sour environments, it must be thoroughly cleaned after use to help prevent corrosion
and/or damage to internal materials.
5.2 Cleaning and Lubricating Without Disassembly
1. Extend the retriever until the socket adapter is withdrawn into the inner barrel by
approximately 1/2 inch. Place the retriever head end down on a clean surface.
2. Add solvent. Pour approximately one pint (1/2 liter) of solvent into the retriever
inner barrel.
3. Collapse the retriever slowly.
Pilot

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4. Extend the retriever slowly. The solvent, while in the process of cleaning and
flushing will remove all lubricant or at least emulsify sufficiently to make extension of
the retriever difficult.
5. Turn the retriever end-for-end. With the retriever head end up, let the solvent drain
out.
6. Repeat steps 1 through 5.
7. Extend the retriever again as indicated in paragraph 1. The retriever head end
should again be placed down on a clean surface.
8. Pour SAE 30 weight motor oil into the retriever inner barrel (about four ounces - 100
grams).
9. Apply grease to the external surface of the retriever inner barrel.
10. Stroke the retriever. Extend and collapse the retriever until the oil and grease have
been adequately filmed on all working surfaces.
11. Test the retriever operation. If the retriever still has a gritty feel and sound after the
stroking procedure indicated above, it must be disassembled for thorough cleaning
and lubricating.

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5.3 Retriever Disassembly
Retriever Diagram

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Parts List

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1. Loosen and remove the Mandrel Rod Stop Nut (15). Remove the Flat Washer (14).
2. Loosen and remove the four 3/8” Allen Screws using a 5/16” Allen Key. Ensure the
Retriever head (10) is held in place.

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3. Remove the Retriever head (10) and the Mandrel Rod Stop Washer (11).
4. Withdraw the Mandrel Rod (12) from the Inner Barrel end (22).

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5. If required, the Socket Assembly may be removed by unscrewing the two 5/16”
Allen screws with a 1/4” Allen Key, and then sliding the Socket Adaptor off the
Mandrel Rod.
6. Remove the Socket Adaptor Pilot, spring, and flat washer. Drive out the split pin
with a 1/4" punch. Reverse steps 6 & 5 to re attach the pilot head.

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7. Remove the Bleed Valve Assembly for individual servicing. Remove individual
components and seals. Flush out with WD40 or other suitable lubricant.
8. Withdraw Inner Barrel from Outer Barrel completely and use wood clamp assembly
to secure retriver on the viser.

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9. Loosen and remove the two 1/4" Allen Screws (26) which retain the Thread Adaptor
(
8
)
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y
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s
i
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a
1
/
8
”
A
l
len Key.
10. Using a C Spanner in the holes provided, unscrew the Thread Adaptor (8) from the
Inner Barrel.

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11. Remove the Hammer Nut (7).
12. Cover the Hammer Nut threads with PTFE tape and carefully slide the Inner Barrel
out through the Retriever Head end.

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13. Loosen and remove the four 3/8” Allen screws to remove the Seal Stop Collar.

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14. Gently remove the Seal Retainer and then the Seal Assembly. Care is required to
prevent damaging the inner seal upon removal.