·ENI_-_Casing_Design_Manual.PDF |
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上 傳 者:luckzyw |
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上傳時間:2010-02-20 07:04:04 |
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INDEX
1. INTRODUCTION 5
1.1. PURPOSE OF CASING 6
2. CASING PROFILES AND DRILLING SCENARIOS 7
2.1. Casing Profiles 7
2.1.1. Onshore Wells 7
2.1.2. Offshore Wells - Surface Wellhead 7
2.1.3. Offshore Wells - Surface Wellhead & Mudline Suspension 7
2.1.4. Offshore Wells - Subsea Wellhead 7
2.2. Drive, Structural & Conductor Casing 8
2.2.1. Surface Casing 8
2.2.2. Intermediate Casing 9
2.2.3. Production Casing 10
2.2.4. Liner 11
3. SELECTION OF CASING SEATS 12
3.1. Conductor Casing 15
3.2. Surface Casing 15
3.3. Intermediate Casing 15
3.4. Drilling Liner 16
3.5. Production Casing 17
3.6. CASING AND relative HOLE SIZES 17
3.6.1. Standard Casing and Hole Sizes 21
4. CASING SPECIFICATION AND CLASSIFICATION 22
4.1. CASING SPECIFICATION 22
4.2. API CASING CLASSIFICATION 23
4.3. NON-API CASING 25
5. MECHANICAL PROPERTIES OF STEEL 28
5.1. General 28
5.2. Stress-Strain Diagram 28
5.3. Heat Treatment Of Alloy Steels 30
6. TUBULAR RANGE LENGTHS & COLOUR CODING 36
6.1. Range lengths 36
6.2. api tubular marking and colour coding 38
6.2.1. Markings 38
6.2.2. Colour Coding 39
ARPO
ENI S.p.A.
Agip Division
IDENTIFICATION CODE PAGE 3 OF 134
REVISION
STAP-P-1-M-6110 0
7. APPROACH TO CASING DESIGN 41
7.1. WELLBORE FORCES 42
7.2. DESIGN FACTOR (DF) 42
7.2.1. Company Design Factors 44
7.2.2. Application of Design Factors 45
8. DESIGN CRITERIA 46
8.1. BURST 46
8.1.1. Design Methods 46
8.1.2. Company Design Procedure 47
8.2. COLLAPSE 50
8.2.1. Company Design Procedure 50
8.3. TENSION 54
8.3.1. General 54
8.3.2. Buoyancy Force 54
8.3.3. Company Design Procedure 59
8.3.4. Example Hook Load During Cementing 59
8.4. BIAXIAL STRESS 62
8.4.1. General 62
8.4.2. Effects On Collapse Resistance 62
8.4.3. Company Design Procedure 64
8.4.4. Example Collapse Caclulation 65
8.5. BENDING 67
8.5.1. General 67
8.5.2. Determination Of Bending Effect 68
8.5.3. Company Design Procedure 70
8.5.4. Example Bending Calculation 70
8.6. CASING WEAR 72
8.6.1. General 72
8.6.2. Volumetric Wear Rate 73
8.6.3. Factors Affecting Casing Wear (Example) 76
8.6.4. Wear Factors 80
8.6.5. Detection Of Casing Wear 86
8.6.6. Casing Wear Reduction 86
8.6.7. Wear Allowance In Casing Design 87
8.6.8. Company Design Procedure 88
8.7. SALT SECTIONS 89
8.7.1. General 89
8.7.2. External Loading Due To Salt Flow 89
8.7.3. Company Design Procedure 94
9. CORROSION 96
9.1. General 96
9.1.1. Exploration and Appraisal Wells 96
9.1.2. Development Wells 96
9.1.3. Contributing Factors to Corrosion 97
9.2. Forms Of Corrosion 98
9.2.1. Sulphide Stress Cracking (SSC) 98
9.2.2. Corrosion Caused By CO2 And Cl- 105
9.2.3. Corrosion Caused By H2S, CO2 And Cl- 107
9.3. Corrosion Control Measures 108
9.4. Corrosion Inhibitors 109
9.5. Corrosion Resistance of Stainless Steels 109
9.5.1. Martensitic Stainless Steels 109
9.5.2. Ferritic Stainless Steels 110
9.5.3. Austenitic Stainless Steels 110
9.5.4. Precipitation Hardening Stainless Steels 110
9.5.5. Duplex Stainless Steel 111
9.6. Casing For Sour Service 113
9.7. Ordering Specifications 114
9.8. Company Design Procedure 114
9.8.1. CO2 Corrosion 114
9.8.2. H2S Corrosion 115
10. TEMPERATURE EFFECTS 118
10.1. High Temperature Service 118
10.2. Low Temperature Service 119
11. LOAD CONDITIONS 120
11.1. SAFE ALLOWABLE TENSILE LOAD 120
11.2. CEMENTING CONSIDERATIONS 120
11.2.1. Casing Support 120
11.2.2. Cementing Loads 121
11.3. PRESSURE TESTING 122
11.4. BUCKLING AND COMPRESSIve loading 122
11.4.1. Buckling 122
11.4.2. Compressive Loads 123
12. PRESSURE RATING OF BOP EQUIPMENT 126
12.1. BOP selection criteria 126
12.2. Kick tolerance 129
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