CMT-LAB-SOP-002 Slurry Conditioning in Atmospheric Consistometer

Global Cementing Laboratory Standard Operating Procedure Effective Date: 05 May 2013 www.bakerhughes.com

Slurry Conditioning in Atmospheric Consistometer CMT-LAB-SOP-002 / Rev. A Table of Contents 1

Purpose ......................................................................................................................................... 2

2

Responsibility ............................................................................................................................... 2 2.1. Laboratory Manager ............................................................................................................. 2 2.2. Laboratory Technician .......................................................................................................... 2

3

Procedure...................................................................................................................................... 3 3.1. Test Equipment .................................................................................................................... 3 3.1.1. Atmospheric Consistometer Slurry Cup Assembly ..................................................... 3 3.1.2. Atmospheric Consistometer ....................................................................................... 3 3.2. Test Procedure .................................................................................................................... 4 3.2.1. Preparation of Cement Slurry .................................................................................... 5 3.2.2. Slurry Conditioning Procedure ................................................................................... 5

4

Resources ..................................................................................................................................... 6

5

Forms ............................................................................................................................................ 6

6

Training ......................................................................................................................................... 6

Table of Figures Figure 1: Slurry Cup Assembly .................................................................................................................................... 3 Figure 3: Cup Paddle Assembly .................................................................................................................................. 3 Figure 2: Torque Indicator ........................................................................................................................................... 3 Figure 4: OFITE Model 80 (Recordable) ..................................................................................................................... 4 Figure 5: EG&G CHANDLER Model 1200 .................................................................................................................. 4 Figure 6: CTE Model 250 (Recordable)....................................................................................................................... 4

Revision History Rev. A

DCR --/rh

Amendment Detail Updated to OPS template and Revised to meet API guidelines

Reviewer L. Jha

Approver M. Rogers

Effective Date 05 May 2013

© 2012-2013 BAKER HUGHES INCORPORATED (UNPUBLISHED WORK). All rights reserved. Terms and conditions of use: By accepting this document, the recipient agrees this document (together with the contents) is confidential and proprietary property of Baker Hughes Incorporated and includes valuable trade secrets, proprietary information of Baker Hughes (collectively “information”). Baker Hughes retains all rights under copyright laws and trade secret laws of the United States of America and other countries. The recipient further agrees the documents may not be distributed, transmitted, copied or reproduced in whole or part by any means, without express written consent of Baker Hughes, and may not be used in any way detrimental to Baker Hughes.

Page 1 of 6 Uncontrolled when printed – confirm the correct revision is used

Baker Hughes – Company Confidential

Slurry Conditioning in Atmospheric Consistometer Cement Lab Test Procedure

CMT-LAB-SOP-002 Rev. A Effective Date: 05 May 2013

1 Purpose The purpose of this document is to describe the correct procedure to condition a cement slurry at temperatures up to a maximum of 190°F (88°C) using an Atmospheric Consistometer. An Atmospheric Consistometer simulates the agitation/ shear which a cement slurry experiences under temperature during placement. Cement tests such as rheology, free water and fluid loss tests require a slurry to be conditioned at simulated downhole temperatures. Bottom hole temperatures greater than 190°F (88°C) cannot be simulated in an Atmospheric Consistometer; under these conditions, a pressurized consistometer must be utilized if required by the test procedure.

2 Responsibility 2.1. Laboratory Manager The laboratory manager or equivalent shall ensure this SOP (Standard Operating Procedure) and associated HRA (Hazard Risk Assessment) are implemented, that personnel executing this procedure are trained and competent to perform this test and that results are stored in the appropriate record storage system.

2.2. Laboratory Technician The laboratory technicians or equivalent shall be familiar with the associated HRA and responsible for executing the SOP. All the results shall be documented in appropriate record storage system and, if applicable, document any discrepancies that may have occurred. The lab technician shall verify that the equipment used in the procedure are maintained and calibrated as per laboratory standards. Any time during the test procedure, if the assigned laboratory technician has any doubt, or is unsure of the correct procedure, senior laboratory personnel shall be consulted. Only qualified laboratory personnel are permitted to run this test.

Page 2 of 6 Uncontrolled when printed – confirm the correct revision is used

FOR INTERNAL USE ONLY Baker Hughes – Company Confidential

Slurry Conditioning in Atmospheric Consistometer Cement Lab Test Procedure

CMT-LAB-SOP-002 Rev. A Effective Date: 05 May 2013

3 Procedure 3.1. Test Equipment 3.1.1. Atmospheric Consistometer Slurry Cup Assembly The cup assembly consists of a brass slurry cup, a paddle and a torque indicator. The point of the paddle shaft sits in the indentation at the center of the bottom plate of the brass slurry cup. The cement slurry to be tested is poured in the slurry cup up to the inscribed line. The lid torque indicator is set in place by locking the pins in the cup slot. Consistency of the slurry can be measured in Bearden Units of Consistency (Bc) when required and is determined by measuring the deflection of a calibrated spring. This deflection is created by the amount of torque that the cement slurry exerts on the paddle. Consistency during test is indicated by the pointer and dial on the slurry cup lid (torque indicator). Figure 1 shows a slurry cup assembly utilized to condition the cement slurries. Figure 2 shows the torque indicator which, if calibrated, can be used to read consistency and Figure 3 shows cup paddle assembly.

Figure 1: Slurry Cup

Figure 2: Torque Indicator

Figure 3: Cup Paddle

3.1.2. Atmospheric Consistometer The atmospheric consistometer consists of a stainless steel bath (water or mineral oil as the heating medium) that houses a slurry cup. An instrument panel houses components that allow control of the bath temperatures. Bearden unit of consistency (Bc) of the slurry can be directly indicated on the top dial of the slurry cup lid (torque indicator). Recordable type atmospheric consistometer are capable of recording the slurry consistency and the test temperature graphically. This recorded data can also be transferred electronically after completion of the test.

Page 3 of 6 Uncontrolled when printed – confirm the correct revision is used

FOR INTERNAL USE ONLY Baker Hughes – Company Confidential

Slurry Conditioning in Atmospheric Consistometer Cement Lab Test Procedure

CMT-LAB-SOP-002 Rev. A Effective Date: 05 May 2013

The rotational speed of the slurry cup is set at the factory at 150 rpm (±15 rpm).

Figure 4: OFITE Model 80 (Recordable)

Figure 5: EG&G CHANDLER Model 1200

Figure 6: CTE Model 250 (Recordable)

3.2. Test Procedure

Cement slurries containing additives BA-59 and BA-61 shall not be conditioned. These additives generate hydrogen gas in-situ and will cause cement to expand rapidly.

Hot slurry and equipment surfaces hazard. Potential eye injury, potential burns • Post hot signage to avoid injury. • Safety glasses at all times • Heat resistant gloves

Cut or sever hazard. Potential hand injury • Wear gloves to avoid injury from sharp metal parts on equipment.

Page 4 of 6 Uncontrolled when printed – confirm the correct revision is used

FOR INTERNAL USE ONLY Baker Hughes – Company Confidential

Slurry Conditioning in Atmospheric Consistometer Cement Lab Test Procedure

CMT-LAB-SOP-002 Rev. A Effective Date: 05 May 2013

3.2.1. Preparation of Cement Slurry Prepare cement slurry for the test according to the procedure outlined in the Standard Operating Procedure - Preparation of Cement Slurry.

3.2.2. Slurry Conditioning Procedure Use the following steps to condition the slurry. Step 1. 2. 3. 4. 5.

Action Place the paddle into the brass slurry cup making sure that the pointed paddle end sits in the pivot bearing indentation of the slurry cup. Pour the cement slurry to be tested in the slurry cup up to the inscribed line. Install the torque indicator lid onto the cup ensuring that the torque shaft pin in the torque indicator engages the slotted shaft of the paddle. Engage the driving pins on the torque indicator with matching slots on the brass slurry cup. Turn the torque indicator clockwise to lock the drive pins. Note

6.

7.

8. 9.

API indicates that the slurry is to be placed in the slurry container within one minute after mixing. Place the lid on the slurry cup as described above ensuring that the driving pins of the cup engage with the slot in the rotator. Ensure the main switch is on. Turn on the motor. For cement slurries, the initial temperature of the atmospheric consistometer should be 80°F ±2°F (27°C ±1°C). If using a different starting temperature, document the temperature. It is not recommended to exceed 90°F ±2°F (32°C ±1°C) unless well conditions dictate otherwise. Program the controller to the desired temperature. (Use reference manual for specific procedures for the equipment under operation.) The maximum test temperature should not exceed 190°F (88°C). Turn on the heater and ramp the cement slurry to the desired test temperature.

Note

10. 11. 12. 13. 14.

Always ramp from starting temperature to the desired test temperature, never add slurry to preheated atmospheric consistometer. Thermal shock has a detrimental effect on slurry properties.

Once at the test temperature, allow the slurry to condition for an additional 30 minutes. Turn off the heater and motor and remove the slurry cup. Remove the slurry cup lid and pull out the paddle. Stir the slurry briskly with a spatula to ensure a uniform slurry. Transfer the conditioned slurry as required for the test to be performed. Note

15.

The top of the torque indicator should be rotated by hand. If it does not rotate freely, the point of the paddle is probably not correctly seated in the brass slurry cup.

Watch for a hard cement mass on the paddle that could be an early indication of settling.

Clean and rinse the slurry cup and paddle for future tests.

Page 5 of 6 Uncontrolled when printed – confirm the correct revision is used

FOR INTERNAL USE ONLY Baker Hughes – Company Confidential

Slurry Conditioning in Atmospheric Consistometer Cement Lab Test Procedure

CMT-LAB-SOP-002 Rev. A Effective Date: 05 May 2013

4 Resources • • • • • • • •

HRA (Hazard Risk Assessment) API RP 10B-2 Recommended Practice for Testing Well Cements Cement Laboratory Standards Cementing Engineering Support Manual Manufacturer’s equipment manual (for maintenance and calibration procedures) Laboratory safety and environmental controls will be carried out in accordance with the corporate HSE procedure Laboratory Operations (LABO) Enterprise Operational Control. Baker Hughes Terms, Definitions, and Acronyms and API RP 10B Terms and Definitions Mixing Manual (Cementing)

5 Forms • •

Baker Hughes Qualification Workplace Assessment Cement test worksheet, lab report, Form 1509 or equivalent.

6 Training • • •

Online self-study guide on laboratory test procedure accessible via Achieve Learning Online competency questionnaire for assessing the knowledge of lab test procedures via Achieve Learning Laboratory Technicians shall refer to the Laboratory Manager to receive on the job training / demonstration in the cementing laboratory as needed.

Page 6 of 6 Uncontrolled when printed – confirm the correct revision is used

FOR INTERNAL USE ONLY Baker Hughes – Company Confidential