Oct 20, 2005 — BOP Maintained on a Scheduled Maintenance Program . The Shaffer manual lock Model LWS ram blowout preventer (LWS BOP) provides a.
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www.nov.com ReferenceReference Description Standard IOM This document contains proprietary and confidential information which belongs to National Oilwell Varco; it is loaned for limited purposes only and remains the property of National Oilwell Varco. Reproduction, in whole or in part; or use of this design or distribution of this information to others is not permitted without the express written consent of National Oilwell Varco. This document is to be returned to National Oilwell Varco upon request and in any event upon completion of the use for which it was loaned. © National Oilwell Varco National Oilwell Varco 12950 West Little York Houston, TX 77041 Phone: 713-937-5000 Fax: 713-856-4138 Document NumberRev. 29100111A User™s Manual LWS Ram Blowout Preventer
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Table of Contents LWS Ram Blowout Prevnters Revision APage iii of iv iiiwww.nov.comChapter 1: General InformationConventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1 Notes, Cautions, and Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1 Illustrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2 Safety Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2 Personnel Training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2 Recommended Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2 General System Safety Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3 Replacing Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3 Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3 Proper Use of Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3 Chapter 2: IntroductionGeneral Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2 Equipment Repairs or Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2 Hydraulic Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2 Welding and Cutting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2 Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2 Chapter 3: Installation and OperationInspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1 Condition of BOP is Unknown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1 BOP Maintained on a Scheduled Maintenance Program . . . . . . . . . . . . . . . . . . .3-1 Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9 Hydraulic Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9 Operating Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-10 Hydraulic Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11 Recommended Hydraulic Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11 Emergency Fluid Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11 Closing and Opening the Rams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12 Closing Rams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12 Opening Rams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12 Manual Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14 Unlocking Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-14 Chapter 4: MaintenanceMaintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1 When to Call for Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1 Daily Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3 Monthly Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4 Three-Month Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4 Yearly Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6 Three-Year Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6 Field Wellbore Pressure Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
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Table of Contents LWS Ram Blowout Prevnters Revision APage iv of iv www.nov.comivEquipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7 Test Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7 Test Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7 Test Fluids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7 Pressure Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 Leak Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 Hydraulic Pressure Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 Opening Hydraulic Pressure Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 Closing Hydraulic Pressure Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 Door Seal Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 Emergency Ram Shaft Packing Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10 Ram Assembly Removal and Inspection Procedures . . . . . . . . . . . . . . . . . . . . 4-12 Removal of Rams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12 Cleaning and Inspection of Rams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15 Installation of Rams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15 Changing Pipe and Blind Ram Rubbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17 Changing Type 72 Shear Ram Rubbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27 Disassembly of the Type 72 Shear Ram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27 Reassembly of Type 72 Shear Ram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31 Changing V-Shear Ram Rubbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32 Disassembly of the V-Shear Ram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32 Reassembly of the Shear Ram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-33 Offset Rams for Dual Completions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34 Aluminum Drill Pipe Rams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34 Cleaning and Storage of the LWS BOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34 LWS BOP Data Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-36 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-37 Chapter 5: Specifications and Parts Lists Parts Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Correspondence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Ordering Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Exploded Views and Parts Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6 Recommended Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-37 Engineering Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-42
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www.nov.com 1-2General Information 1LWS Ram Blowout Preventers Revision A Page 1-2 of 4 IllustrationsIllustrations (figures) provide a graphical representation of equipment components or screen snapshots for use in identifying parts, or establishing nomenclature, and may or may not be drawn to scale. For component information specific to your rig configuration, see the technical drawings included with your equipment documentation. Safety Requirements The National Oilwell Varco equip ment is installed and operate d in a controlled drilling rig environment involving hazardous situations. Proper maintenance is important for safe and reliable operation. Procedures outlined in the equipment manuals are the recommended methods of performing operations and maintenance. Personnel Training All personnel performing installation, operations, repair, or maintenance procedures on the equipment, or those in the vicinity of the equipment, should be trained on rig safety, tool operation, and maintenance to ensure their safety. Contact the National Oilwell Varco training department for more information about equipment operation and maintenance training. Recommended Tools Service operations may require the use of to ols designed specifically for the purpose described. The equipment manufacturer recommends that only those tools specified be used when stated. Ensure that personnel and equipment safety are not jeopardized when following service procedures and that personnel are not using tools that were not specifically recommended by Manufacturer. To avoid injury to personnel or equipment damage, carefully observe requirements outlined in this section. Personnel should wear protective gear during installation, maintenance, and certain operations.
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1-3www.nov.comLWS Ram Blowout Preventers Revision A Page 1-3 of 4General Information 1General System Safety PracticesThe equipment discussed in this manual may re quire or contain one or more utilities such as electrical, hydraulic, pneumatic, or cooling water. Isolate energy sources before beginning work. Avoid performing maintenance or repairs while the equipment is in operation. Wear proper protective equipment during equipment installation, maintenance, or repair. Replacing ComponentsVerify that all components (such as cables, hoses, etc.) are tagged and labeled during assembly and disassembly of equipment to ensure correct installment. Replace failed or damaged components with original equipment manufacturer certified parts. Failure to do so could result in equipment damage or injury to personnel. Routine MaintenanceEquipment must be maintained on a routine basis. See product-specific service manuals for maintenance recommendations. Proper Use of Equipment National Oilwell Varco equipment is designed for specific functions and applications, and should be used only for its intended purpose. Read and follow the guidelines below before installing equipment or performing maintenance to avoid endangering exposed persons or damaging equipment. Failure to conduct routine maintenance could result in equipment damage or injury to personnel.
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www.nov.com2-1LWS Ram Blowout Preventers Revision A Page 2-1 of 2 Introduction General DescriptionThe Shaffer manual lock Model LWS ram blowout preventer (LWS BOP) provides a rugged, reliable preventer that is easily serviced in the field. Special features include: Doors that simplify ram changes Door seals with special backing to prevent extrusion and pinching Standard internal H 2S trim Wear rings between the piston and cylinder to increase seal life and to virtually eliminate cylinder bore wear Polyurethane lip-type piston seals with lifetime lubrication Lip-type ram shaft seals to hold the wellbore pressure and the opening hydraulic pressureSecondary ram shaft seals to permit injection of plastic packing if the primary lip- type seal ever fails Some sizes provide bo oster cylinder capability for shearing pipe The manual lock LWS BOP is available in single and double models. Contact Shaffer Sales for special configurations. This manual provides the installation, operation, and maintenance procedures for standard manual lock LWS BOP models. Shaffer supplies manual lock LWS BOPs in the sizes shown in the table titled “LWS BOP Available Sizes and Working Pressures” below. These BOPs are designed for drilling and work over service. They are hydraulically operated and can be manually locked by turning handwheels. The standard trim unit is LWS BOP Available Sizes and Working Pressures Working PressureSize 10,000 psi (690 bar) 4 1/16″ (103.19 mm) 5,000 psi (345 bar) 11″ (279.40 mm) 9″ (228.60 mm) 7 1/16″ (179.39 mm) 4 1/16″ (103.19 mm) 3,000 psi (207 bar) 20 ¾” (527.05 mm) 11″ (279.40 mm) 9″ (228.60 mm) 2,000 psi (138 bar)21 ¼” (539.75 mm)
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