Drilling and Well Servicing Equipment

API SPECIFICATION 7K

SIXTH EDITION, DECEMBER 2015

API MONOGRAM PROGRAM EFFECTIVE DATE: DECEMBER 30, 2016

Special Notes

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Copyright © 2015 American Petroleum Institute

Foreword

Nothing contained in any API publication is to be construed as granting any right, by implication or otherwise, for the manufacture, sale, or use of any method, apparatus, or product covered by letters patent. Neither should anything contained in the publication be construed as insuring anyone against liability for infringement of letters patent.

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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 1

3. Terms, Definitions, and Acronyms 3

   1. Terms and Definitions 3

   2. Acronyms 9

4. Design 9

   1. Design Conditions 9

   2. Strength Analysis 10

   3. Size Class Designation 11

   4. Rating 11

   5. Load Rating Basis 12

   6. Design Safety Factor (DSF) 12

   7. Shear Strength 12

   8. Specific Equipment 13

   9. Design Documentation 13

5. Design Verification 13

   1. General 13

   2. Design Verification Function Test 13

   3. Design Verification Pressure Test 14

   4. Design Verification Load Test 14

   5. Determination of Rated Load 15

   6. Alternative Design Verification Test Procedure and Rating 15

   7. Load Test Apparatus 17

   8. Design Changes 17

   9. Records 17

6. Materials Requirements 17

   1. General 17

   2. Written Specifications 17

   3. Metallic Materials 17

   4. Non-metallic and Composite Materials 22

7. Welding Requirements 24

   1. General 24

   2. Welding Qualification 24

   3. Written Documentation 24

   4. Control of Consumables 24

   5. Weld Properties 24

   6. Post-weld Heat Treatment (PWHT) 25

   7. Quality Control Requirements 25

   8. Specific Requirements—Fabrication Welds 25

   9. Specific Requirements—Repair Welds 25

8. Quality Control 26

   1. General 26

   2. Quality Control Personnel Qualifications 26

   3. Measuring and Test Equipment 26

   4. Quality Control for Specific Equipment and Components 26

   5. Dimensional Verification 31

   6. Proof Load Testing 31

   7. Hydrostatic Testing 32

   8. Functional Testing 32

      v

      Contents

      Page

   9. Processes Requiring Validation 33

9. Equipment 33

   1. General 33

   2. Rotary Tables 33

   3. Rotary Bushings 36

   4. Slip Bowls 38

   5. Rotary Slips 40

   6. Spiders 44

   7. High-pressure Mud and Cement Hoses 44

   8. Piston Mud-pump Components 52

   9. Drawworks Components 85

   10. Manual Tongs 86

   11. Safety Clamps Not Used as Hoisting Devices 86

   12. BOP Handling Systems and Equipment 87

   13. Pressure-relieving Devices for High-pressure Drilling Fluid Circulating Systems 95

   14. Snub Lines for Manual and Power Tongs 97

   15. Antifriction Bearings 99

10. Marking 99

    1. Product Marking 99

    2. Marking Method 99

11. Documentation 99

    1. Record Retention 99

    2. Documentation to be Kept by the Manufacturer 99

    3. Documentation to be Delivered with the Equipment 100

Annex A (normative) Supplementary Requirements 101

Annex B (informative) Guidance for Qualification of Heat Treatment Equipment 103

Annex C (informative) Recommended Piston Mud-pump Nomenclature and Maintenance 105

Annex D (informative) Use of the API Monogram by Licensees 110

Annex E (normative) Load-limiting Design of Manual Tongs 113

Annex F (informative) Information with Inquiry or Order 116

Bibliography 120

Figures

1. Minimum Design Safety Factors for Spiders and Rotary Slips 12

2. Minimum Design Safety Factors for Manual Tongs 12

3. Determination of Test Loads 16

4. Adjustment Factors for Subsize Impact Specimens 18

5. Development of Keel Block Dimensions 21

6. Rotary Table Pinion-straight Shaft Extension 34

7. Rotary Table with Square-drive Bushings 35

8. Rotary Table Opening and Square-drive Master Bushing 37

9. Pin-drive Master Bushing and Kelly Bushing 38

10. Demountable Rotary Sprocket 41

11. Rotary Vibrator and Drilling Hose Dimensions 49

12. Tapers 1 Through 6 55

13. Tapers 5 HP and 6 HP 56

14. Fluid End of Single-acting Mud-pump Piston Rod and Piston Body Bore 57

15. Crosshead, Crosshead Extension, and Piston Rod Connections—Tapered Thread Type 59

16. Tapered Thread Form 60

    Contents

    Page

17. Gauging Practice for Crosshead, Crosshead Extension, and Piston Rod Connections—Tapered Thread Type 63

18. Crosshead Extension and Piston Rod Locknut 64

19. Straight Thread Form 66

20. Crosshead, Crosshead Extension, and Piston Rod Connections—Straight Thread Type 67

21. Mud-pump Valve Pot 69

22. Mud-pump Liner 70

23. Tapered-thread and Plain Gauges 77

24. Pin Go and No-go Gauges (for Straight-threaded Portion of Tapered-thread Connection) 80

25. Box Go and No-go Gauges (for Locknut) 80

26. Gauge Thread Form 83

27. Torque Hammer 83

28. Contacting Flat Faces and Pilot Diameters on Mating Connections from Crosshead Extension to Piston Hub on Mud Pumps 84

29. Illustration of the Resultant Load on a Single Sheave Block 89

B.1 Thermocouple Location in Cylindrical Furnaces 104

1. Section Through Power End 106

2. Section Through Crankshaft 107

3. Section Through Pinion Shaft and Crosshead 107

4. Fluid End of Duplex Double-acting Mud Pump 108

5. Fluid End of Triplex Single-acting Mud Pump 109

Tables

1. Equivalent Round (ER) Models—Solids of Length L 19

2. Equivalent Round (ER) Models—Tube (Any Section) 19

3. Equivalent Round (ER) Models-Complex Shapes 20

4. Equivalent Round (ER) Models—Keel Block Configuration 20

5. Castings Indication Acceptance Criteria 28

6. Rotary Table Pinion-straight Shaft Extension 34

7. Rotary Table Opening and Square-drive Master Bushing 39

8. Four-pin-drive Master Bushing and Kelly Bushing 39

9. Demountable Rotary Sprocket Data 40

10. Rotary Drilling and Vibrator Hoses, Cement Hoses, and Mud Delivery Hoses 45

11. Fluid End of Double-acting Mud-pump Piston Rods and Piston Body Bores 54

12. Fluid End of Single-acting Mud-pump Piston Rods and Piston Body Bores 57

13. Crosshead, Crosshead Extension, and Piston Rod Connections-Tapered Thread Type 58

14. Crosshead, Crosshead Extension, and Piston Rod Connections-Straight Thread Type 61

15. Mud-pump Valve Pots 68

16. Tolerances on Gauge Dimensions 72

17. Tapered Thread and Plain Gauges (20 °C) 75

18. Tapered Thread and Plain Gauges (68 °F) 76

19. Pin Go and No-go Gauges (for Straight Threaded Portion of Tapered-thread Connection) 78

20. Pin Go and No-go Gauges (for Straight-threaded Portion of Tapered-thread Connection) 79

21. Box Go and No-go Gauges(for Locknut) 81

22. Box Go and No-go Gauges (for Locknut) 82

23. Gauge Thread Height Dimensions 82

24. Default Dynamic Factors 93

1. Power-end Parts, Duplex and Triplex Pumps 106

2. Fluid-end Parts, Duplex Pumps 108

3. Fluid-end Parts, Triplex Pumps 109

vi

Drilling and Well Servicing Equipment

1. Scope

   This specification provides general principles and specifies requirements for design, manufacture, and testing of new drilling and well-servicing equipment and of replacement primary load-carrying components manufactured subsequent to the publication of this specification.

   
   

   This specification is applicable to the following equipment:

   
   

   a) rotary tables;

   
   

   1. rotary bushings;

      
      

   2. high-pressure mud and cement hoses;

      
      

   3. piston mud-pump components;

      
      

   4. drawworks components;

      
      

   5. manual tongs;

      
      

   6. safety clamps not used as hoisting devices;

      
      

   7. blowout preventer (BOP) handling systems;

      
      

   8. pressure-relieving devices for high-pressure drilling fluid circulating systems;

      
      

   9. snub lines for manual and power tongs;

      
      

   10. rotary slips, both manual and powered;

       
       

   11. slip bowls; and

       
       

   12. spiders, both manual and powered.

   
   

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.

API Specification 5B, Specification for Threading, Gauging and Thread Inspection of Casing, Tubing, and Line Pipe Threads

API Specification 6A, Specification for Wellhead and Christmas Tree Equipment

API Specification 9A, Specification for Wire Rope

API Recommended Practice 9B, Recommended Practice on Application, Care, and Use of Wire Rope for Oilfield Service

API Specification 16A, Specification for Drill-through Equipment

1