Specification for Drill-through Equipment

API SPECIFICATION 16A FOURTH EDITION, APRIL 2017

EFFECTIVE DATE: OCTOBER 1, 2017

Special Notes

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Copyright © 2017 American Petroleum Institute

Foreword

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Shall: As used in a standard, “shall” denotes a minimum requirement in order to conform to the specification.

Should: As used in a standard, “should” denotes a recommendation or that which is advised but not required in order to conform to the specification.

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Suggested revisions are invited and should be submitted to the Standards Department, API, 1220 L Street, NW, Washington, DC 20005, standards@api.org.

iii

Contents

Page

1. Scope 1

2. Normative References 4

3. Terms, Definitions, Acronyms, and Abbreviations 6

   1. Terms and Definitions 6

   2. Acronyms and Abbreviations 15

4. Design Requirements 16

   1. Size Designation 16

   2. Service Conditions 17

   3. Equipment-specific Design Requirements 19

   4. Design Methods 37

   5. Design Validation 39

   6. Documentation 41

   7. Tests for BOP and Hydraulic Connector Operational Characteristics 42

   8. PR1 Operating Manual Requirements 78

   9. PR2 Operating Manual Requirements 79

   10. Technical Data Sheet 81

5. Material Requirements 81

   1. General 81

   2. Written Specifications 81

   3. Pressure-containing parts 82

   4. Pressure-controlling Parts 88

6. Welding Requirements 89

   1. General 89

   2. Weldment Design and Configuration 90

   3. Welding Controls 93

   4. Welding Procedure and Performance Qualifications 95

   5. Other Requirements 96

7. Quality Control Requirements 101

   1. General 101

   2. Measuring and Testing Equipment 101

   3. Quality Control Personnel Qualifications 101

   4. Quality Control Requirements for Equipment and Parts 102

   5. Quality Control Requirements for Specific Equipment and Parts 102

   6. Requirements for Quality Control Records 115

   7. Failure Reporting 117

8. Marking Requirements 117

   1. General 117

   2. Types of Identification Stamping 117

   3. Specific Codification Requirements of Equipment 117

   4. Product Description Code (PDC) 120

9. Storing and Shipping 122

   1. Storing for Periods Greater than 30 Days 122

   2. Shipping 123

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Contents

Page

Annex A (informative) API Monogram Program—Use of the API Monogram by Licensees 124

Annex B (normative) Qualification of Heat-treating Equipment 128

Annex C (informative) Purchasing Guidelines 131

Annex D (normative) Failure Reporting 133

Annex E (normative) Minimum Requirements for Certificate of Conformance (COC) 134

Annex F (normative) Charpy V-notch Impact Test Location for Weld Qualification 138

Annex G (informative) Conversion of U.S. Customary Units to the SI System (Metric) 140

Bibliography 144

Figures

1. Simplified Example of Surface Drill-through Equipment 2

2. Simplified Example of Subsea Drill-through Equipment 3

3. Type 16B and 16BX Integral Hub Connections 24

4. Type 16B and 16BX Blind Hubs 25

5. Rough Machining of Type SR Ring Grooves 26

6. Finish Machining of Type SR Ring Grooves. 27

7. Clamps for Type 16B and 16BX Hub Connections 34

8. Connector Capacity Chart 40

9. Equivalent Round Models 87

10. Typical Weld Grooves for Pipe Butt Joints. 91

11. Typical Attachment Welds 92

12. Typical Repair Welds 93

13. Typical Excavation for Repair Welds 93

14. Rockwell Hardness Test Locations 97

15. Hardness Test Locations for Weld Overlay 98

16. Vickers Hardness Test Locations 99

1. Thermocouple Locations—Rectangular Furnace (Working Zone) 129

2. Thermocouple Locations—Cylindrical Furnace (Working Zone) 129

E.1 Example Certificate of Conformance 136–137

F.1 Location of Charpy V-notch Impact Test 139

G.1 Metric Conversions 141

Tables

1. Equipment Size 17

2. Equipment Rated Working Pressures 17

3. Temperature Ratings for Metallic Materials 18

4. Temperature Ratings for Nonmetallic Sealing Materials 18

5. Pressure Rating and Size Ranges of API 6A Flange Connectors 19

6. Bolting Requirement 21

7. Pressure Ratings and Size Ranges of Type 16B and 16BX Hubs 23

8. Type 16B Integral Hub Connections for 13.8 MPa (2,000 psi) Rated Working Pressure 23

9. Type 16B Integral Hub Connections for 20.7 MPa (3,000 psi) Rated Working Pressure 24

10. Rough Machining of Type SR Ring Grooves 25

11. Finish of Machining of Type SR Ring Grooves 26

12. Type 16BX Integral Hub Connections for 34.5 MPa (5,000 psi) Rated Working Pressure 28

    vi

    Contents

    Page

13. Type 16BX Integral Hub Connections for 69.0 MPa (10,000 psi) Rated Working Pressure 29

14. Type 16BX Integral Hub Connections for 103.5 MPa (15,000 psi) Rated Working Pressure 30

15. Type 16BX Integral Hub Connections for 138.0 MPa (20,000 psi) Rated Working Pressure 31

16. Clamps for Type 16B and 16BX Hub Connections 32

17. Ring Gasket Numbers for API 6A/16A Equipment 35

18. Required Tests and Performance Criteria for Ram BOPs 42

19. Test Mandrel Pipe Size(s) for Ram Testing. 43

20. Required Tests and Performance Criteria for Fixed Bore Pipe Rams and Blind Rams 44

21. Required Tests and Performance Criteria for Variable Bore Pipe Rams 44

22. Required Tests and Performance Criteria for Blind Shear Rams 45

23. Shear Pipe Requirements 45

24. Required Tests and Performance Criteria for Non-Sealing Shear Rams 46

25. Required Tests and Performance Criteria for Annular BOPs 46

26. Test Mandrel Pipe Size(s) for Annular Packers 47

27. Required Tests and Performance Criteria for Annular Packers 47

28. Required Tests and Performance Criteria for Hydraulic Connectors 47

29. Material Property Requirements for Metallic Pressure-Containing Parts 82

30. Material Applications for Metallic Pressure-Containing Parts 83

31. Steel Composition Limits (% Mass Fraction) for Pressure-containing Parts 84

32. Alloying Element Range—Maximum Tolerance Requirements 85

33. Acceptance Criteria for Charpy V-notch Impact Tests 85

34. Adjustment Factors for Sub-size Impact Specimens 86

35. Chemical Composition of the Nickel-based Alloy N06625 100

36. Minimum Hardness Requirements 103

37. Weld Inclusion Criteria 107

38. Weld Inclusion Criteria 110

39. Hydrostatic Test Pressures 112

40. Pipe Size Requirements 113

41. Marking Requirements and Location 118

42. Code System for Nonmetallic Sealing Materials 119

43. Elastomer Compound Marking Code 120

44. Product Description Code 120

45. Equipment Type 121

46. API Equipment Size Designation 121

47. Rated Working Pressure 122

48. Temperature Ratings (Metallic Materials) 122

C.1 Manufacturing Data Book (MDB) 132

1. Pressure Ratings 142

2. Nominal Sizes 143

Specification for Drill-through Equipment

1 Scope

This specification defines the requirements for performance, design, materials, testing and inspection, welding, marking, handling, storing, and shipping of drill-through equipment used for drilling for oil and gas. It also defines service conditions in terms of pressure, temperature, and wellbore fluids for which the equipment is designed.

This specification is applicable to and establishes requirements for the following specific equipment:

1. ram blowout preventers;

   
   

2. ram blocks, packers, and top seals;

   
   

3. annular blowout preventers;

   
   

4. annular packing units;

   
   

5. hydraulic wellbore connectors (wellhead, riser, or LMRP);

   
   

6. drilling spools and spacer spools;

   
   

7. adapters;

   
   

8. mandrels (for wellbore connectors);

   
   

9. loose connections;

   
   

10. clamps.

Dimensional interchangeability is limited to end and outlet connections.

A simplified example of drill-through equipment defined by this specification is shown in Figures 1 and 2.

Repair and remanufacture of 16A equipment is covered in API 16AR, Standard for Repair and Remanufacturing of Drill-through Equipment.

This specification does not apply to field use or field testing of drill-through equipment.

If a product is supplied bearing the API Monogram and manufactured at a facility licensed by API, the requirements of Annex A apply.

2 API SPECIFICATION 16A

Figure 1—Simplified Example of Surface Drill-through Equipment

SPECIFICATION FOR DRILL-THROUGH EQUIPMENT 3

UPPER

ANNULAR

LOWER

ANNULAR

LMRP OR RISER

CONNECTOR

MANDREL

BLIND SHEAR RAM

CASING SHEAR RAM

UPPER

PIPE RAM

LOWER PIPE RAM

FLANGE OR HUB CONNECTION

WELLHEAD CONNECTOR

Figure 2—Simplified Example of Subsea Drill-through Equipment