M00044787
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API Spec 7K Drilling and Well Servicing Equipment, Sixth Edition, Includes Errata 1 and 2 (2016), Errata 3 (2017)
standard by American Petroleum Institute, 12/30/2015
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API SPECIFICATION 7K
SIXTH EDITION, DECEMBER 2015
API MONOGRAM PROGRAM EFFECTIVE DATE: DECEMBER 30, 2016
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Copyright © 2015 American Petroleum Institute
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Page
Scope 1
Normative References 1
Terms, Definitions, and Acronyms 3
Terms and Definitions 3
Acronyms 9
Design 9
Design Conditions 9
Strength Analysis 10
Size Class Designation 11
Rating 11
Load Rating Basis 12
Design Safety Factor (DSF) 12
Shear Strength 12
Specific Equipment 13
Design Documentation 13
Design Verification 13
General 13
Design Verification Function Test 13
Design Verification Pressure Test 14
Design Verification Load Test 14
Determination of Rated Load 15
Alternative Design Verification Test Procedure and Rating 15
Load Test Apparatus 17
Design Changes 17
Records 17
Materials Requirements 17
General 17
Written Specifications 17
Metallic Materials 17
Non-metallic and Composite Materials 22
Welding Requirements 24
General 24
Welding Qualification 24
Written Documentation 24
Control of Consumables 24
Weld Properties 24
Post-weld Heat Treatment (PWHT) 25
Quality Control Requirements 25
Specific Requirements—Fabrication Welds 25
Specific Requirements—Repair Welds 25
Quality Control 26
General 26
Quality Control Personnel Qualifications 26
Measuring and Test Equipment 26
Quality Control for Specific Equipment and Components 26
Dimensional Verification 31
Proof Load Testing 31
Hydrostatic Testing 32
Functional Testing 32
v
Page
Processes Requiring Validation 33
Equipment 33
General 33
Rotary Tables 33
Rotary Bushings 36
Slip Bowls 38
Rotary Slips 40
Spiders 44
High-pressure Mud and Cement Hoses 44
Piston Mud-pump Components 52
Drawworks Components 85
Manual Tongs 86
Safety Clamps Not Used as Hoisting Devices 86
BOP Handling Systems and Equipment 87
Pressure-relieving Devices for High-pressure Drilling Fluid Circulating Systems 95
Snub Lines for Manual and Power Tongs 97
Antifriction Bearings 99
Marking 99
Product Marking 99
Marking Method 99
Documentation 99
Record Retention 99
Documentation to be Kept by the Manufacturer 99
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
Minimum Design Safety Factors for Spiders and Rotary Slips 12
Minimum Design Safety Factors for Manual Tongs 12
Determination of Test Loads 16
Adjustment Factors for Subsize Impact Specimens 18
Development of Keel Block Dimensions 21
Rotary Table Pinion-straight Shaft Extension 34
Rotary Table with Square-drive Bushings 35
Rotary Table Opening and Square-drive Master Bushing 37
Pin-drive Master Bushing and Kelly Bushing 38
Demountable Rotary Sprocket 41
Rotary Vibrator and Drilling Hose Dimensions 49
Tapers 1 Through 6 55
Tapers 5 HP and 6 HP 56
Fluid End of Single-acting Mud-pump Piston Rod and Piston Body Bore 57
Crosshead, Crosshead Extension, and Piston Rod Connections—Tapered Thread Type 59
Tapered Thread Form 60
Page
Gauging Practice for Crosshead, Crosshead Extension, and Piston Rod Connections—Tapered Thread Type 63
Crosshead Extension and Piston Rod Locknut 64
Straight Thread Form 66
Crosshead, Crosshead Extension, and Piston Rod Connections—Straight Thread Type 67
Mud-pump Valve Pot 69
Mud-pump Liner 70
Tapered-thread and Plain Gauges 77
Pin Go and No-go Gauges (for Straight-threaded Portion of Tapered-thread Connection) 80
Box Go and No-go Gauges (for Locknut) 80
Gauge Thread Form 83
Torque Hammer 83
Contacting Flat Faces and Pilot Diameters on Mating Connections from Crosshead Extension to Piston Hub on Mud Pumps 84
Illustration of the Resultant Load on a Single Sheave Block 89
B.1 Thermocouple Location in Cylindrical Furnaces 104
Section Through Power End 106
Section Through Crankshaft 107
Section Through Pinion Shaft and Crosshead 107
Fluid End of Duplex Double-acting Mud Pump 108
Fluid End of Triplex Single-acting Mud Pump 109
Tables
Equivalent Round (ER) Models—Solids of Length L 19
Equivalent Round (ER) Models—Tube (Any Section) 19
Equivalent Round (ER) Models-Complex Shapes 20
Equivalent Round (ER) Models—Keel Block Configuration 20
Castings Indication Acceptance Criteria 28
Rotary Table Pinion-straight Shaft Extension 34
Rotary Table Opening and Square-drive Master Bushing 39
Four-pin-drive Master Bushing and Kelly Bushing 39
Demountable Rotary Sprocket Data 40
Rotary Drilling and Vibrator Hoses, Cement Hoses, and Mud Delivery Hoses 45
Fluid End of Double-acting Mud-pump Piston Rods and Piston Body Bores 54
Fluid End of Single-acting Mud-pump Piston Rods and Piston Body Bores 57
Crosshead, Crosshead Extension, and Piston Rod Connections-Tapered Thread Type 58
Crosshead, Crosshead Extension, and Piston Rod Connections-Straight Thread Type 61
Mud-pump Valve Pots 68
Tolerances on Gauge Dimensions 72
Tapered Thread and Plain Gauges (20 °C) 75
Tapered Thread and Plain Gauges (68 °F) 76
Pin Go and No-go Gauges (for Straight Threaded Portion of Tapered-thread Connection) 78
Pin Go and No-go Gauges (for Straight-threaded Portion of Tapered-thread Connection) 79
Box Go and No-go Gauges(for Locknut) 81
Box Go and No-go Gauges (for Locknut) 82
Gauge Thread Height Dimensions 82
Default Dynamic Factors 93
Power-end Parts, Duplex and Triplex Pumps 106
Fluid-end Parts, Duplex Pumps 108
Fluid-end Parts, Triplex Pumps 109
vi
Drilling and Well Servicing Equipment
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;
rotary bushings;
high-pressure mud and cement hoses;
piston mud-pump components;
drawworks components;
manual tongs;
safety clamps not used as hoisting devices;
blowout preventer (BOP) handling systems;
pressure-relieving devices for high-pressure drilling fluid circulating systems;
snub lines for manual and power tongs;
rotary slips, both manual and powered;
slip bowls; and
spiders, both manual and powered.
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
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