Recommended Practice for Subsea Pump Module Systems

API RECOMMENDED PRACTICE 17X FIRST EDITION, OCTOBER 2021

Special Notes

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Copyright © 2021 American Petroleum Institute

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Foreword

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to conform to the standard.

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Contents

Page

1. Scope 1

2. Normative References 1

3. Terms, Definitions, Acronyms, and Abbreviations 2

   1. Terms and Definitions 2

   2. Acronyms and Abbreviations 5

4. System Design Requirements 6

   1. System Configuration 6

   2. General Design Requirements 8

   3. Rotor Dynamic Analysis 11

5. Component Design Requirements 12

   1. Pressure Casing 12

   2. Static Seals 13

   3. Clearances and Wear 13

   4. Pump Bearings 13

   5. Rotor Balancing 14

   6. Thrust Management 14

   7. Mechanical Shaft Seals 14

   8. Motor Design 15

   9. Shaft Couplings 17

   10. Pump Control Systems 18

   11. Motor Instrumentation 19

   12. Pump Module Requirements 19

6. Materials 20

   1. Process Wetted Materials 20

   2. Pump Module Structure and Piping 21

   3. Pump and Motor Casing Specifications 21

7. Marking and Manufacturing Documentation 22

   1. Manufacturing Documentation 22

   2. Marking 22

8. Qualification and Testing 24

   1. Qualification Testing 24

   2. Pump Performance Testing 27

   3. Factory Acceptance Testing 30

   4. Site Receival Testing 32

   5. System Integration Testing 32

9. Transportation and Preservation 32

   1. General 32

   2. Lifting Arrangements 32

   3. Preservation 32

10. Installation and Intervention 34

    1. General 34

    2. Retrieval 34

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       Contents

       Page

11. Reliability, Operations and Maintenance 34

    1. Reliability and Maintenance Data 34

    2. Module Operations and Maintenance 35

    3. Module Retrieval 35

Annex A (normative) Pump Design Data Sheets Minimum Requirements 36

Annex B (informative) Qualification Testing 47

Annex C (informative) Application Specific Testing 53

Annex D (informative) Pump Manufacturing Data Check List and Schedule 58

Bibliography 67

Figures

1. Subsea Pump System Classification and Designation 7

2. Vibration Limits for GVF <40 % in a Vertical Rotor Dynamic Pump with Hydrodynamic Bearings 28

3. Vibration Limits for GVF >40% in a Vertical Rotor Dynamic Pump with Hydrodynamic Bearings 28

4. Illustration of Recommended Placement for Proximity Probes During Testing 29

B.1 Location of Test Points on the Operational Envelope 51

C.1 Location of Test Points on the Operational Envelope 56

1. Manufacturer Drawing and Data Requirement List 59

2. Manufacturer Drawing and Data Requirement List (continued) 60

3. Manufacturer Drawing and Data Requirement List (continued) 61

Tables

1. Pump Classification Type Identification 8

2. Pump Module Interfaces 11

3. Insulation Thermal Classes used for Subsea Motors 16

4. Bolting Requirement 21

5. Classification by Installation Depth 22

6. Classification by Sea Water Temperature 23

7. Classification by Process Fluid Temperature 23

8. Casing Rated Pressure Class 23

9. Pre-accepted Configuration Changes 25

10. Scope of Test Object 26

1. Design Basis (Input) Datasheet 36

2. Production Datasheet 38

3. Umbilical Requirements (Input and Output) Datasheet 40

4. Control Requirements (Input and Output) Datasheet 41

5. Pump Data Datasheet 41

6. Barrier Fluid System Datasheet 42

7. Pump Rating and Material Details Datasheet 42

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   Contents

   Page

8. Motor Design Datasheet 43

9. Equivalent Rated Operating Point (Input and Output) Datasheet 44

10. Test Data Collection Requirement Datasheet 45

1. Suggested Start-up and Shutdown Test Process for Qualification Testing 48

2. Suggested Start-up and Shut-down Test Order for Qualification Testing 48

3. Test Points and Their Locations on Operational Envelope 50

4. Suggested Extended Performance Test Process for Qualification Testing 51

1. Suggested Start-up and Shut-down Test Process for Application Specific Testing 53

2. Suggested Start-up and Shut-down Test Order for Application Specific Testing 54

3. Suggested Datapoint Distribution for Collecting GVF Related Reliability Data 56

4. Suggested Extended Performance Test Process for Application Specific Testing 57

D.1 Details and Comments to Figure D.1, Figure D.2, and Figure D.3 61

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Introduction

API RP 17X. relies on the principles of API Std 610 and API Std 676. The intent of this recommended practice (RP) is to provide requirements, recommendations and guidance for the specification, design, construction, transportation, installation, maintenance, operation of subsea pumps. It is intended to be applied in conjunction with the API 17 suite of documents. This RP is not intended to inhibit a manufacturer from offering innovative solutions for pumping or engineering solutions for the individual applications.

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Recommended Practice for Subsea Pump Module Systems

1. Scope

   
   

   This RP provides guidance for the design, manufacture, installation, and operation of subsea pumps, including rotary displacement and rotor dynamic types for single phase, and multi-phase services. The RP applies to all subsea pump modules placed at or above the mud line.

   
   

   API RP 17X describes subsea pump modules that are either directly designed or “marinized” for use in an

   offshore/marine environment. Potential applications include:

   
   

   • Offshore use near subsea wells to boost production and enhance oil recovery (EOR) from partially depleted oil fields, or:

     
     

   • To boost flowline pressures to flow at higher rates or greater distances or when flowing subsea wells up to a

   surface facility.

   
   

   The design of such system solutions requires additional equipment to power, control and otherwise operate the pumps. These are not within the scope of this document and can be found in API Std 17F, API Std 17G, API 17Z, and other relevant standards for these and associated equipment on the host facility or site.

   
   

2. Normative References

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies, except that new editions may be used on issue and shall become mandatory upon the effective date specified by the publisher or six months from the date of the revision (where no effective date is specified).

API Specification 6A, Specification for Wellhead and Tree Equipment

API Recommended Practice 17A, Design and Operation of Subsea Production Systems—General Requirements and Recommendations

API Specification 17D, Design and Operation of Subsea Production Systems—Subsea Wellhead and Tree Equipment, Second Edition, May 2011, Addendum 1, September 2015

API Standard 17F, Standard for Subsea Production Control Systems

API Recommended Practice 17H, Recommended Practice for Remotely Operated Tools and Interfaces on Subsea Production Systems

API Recommended Practice 17P, Design and Operation of Subsea Production Systems—Subsea Structures and Manifolds

API Recommended Practice 17V, Recommended Practice for Analysis, Design, Installation, and Testing of Safety Systems for Subsea Applications

API Specification 20E, Alloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries

API Specification 20F, Corrosion-resistant Bolting for Use in the Petroleum and Natural Gas Industries API Standard 541, Form-wound Squirrel Cage Induction Motors—375 kW (500 Horsepower) and Larger API Standard 546, Brushless Synchronous Machines— 500kVA and Larger

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