SY/T 4096-1995 Technical specification for wellhead protection devices in offshore oil fields
Some standard content:
Petroleum and Natural Gas Industry Standard of the People's Republic of ChinaSY
SY/ T 409695
Technical specification for wellhead isolation tool inbeach- shallow sea
Published on 1995-12-18
Implemented on 1996-06-01
Published by China National Petroleum Corporation
Petroleum and Natural Gas Industry Standard of the People's Republic of China Technical specification for wellhead isolation tool inbeach--shallowsea
SY T 4096-95
Editor: Shengli Petroleum Administration Bureau Survey and Design Institute Shengli Petroleum Administration Bureau Oil Construction No. 1 Company
Approving Department: China National Petroleum Corporation Petroleum Industry Press
1995 Beijing
Environmental conditions and loads
General provisions
Environmental conditions
Load classification and load combination Original steel
Structural analysis
Steel structure·
Concrete structure
Structural design
Materials and anti-corrosion
Steel structure
Concrete structure
Onshore construction
Offshore construction
Appendix A
Explanation of terms used in this code| |tt||Additional explanation
Technical specification for wellhead protection device of offshore oilfields Explanation of clauses (13)
(14)
(15)
Document of China National Petroleum Corporation
(95 CNPC Technical Supervision No. 731
Notice on the approval and release of 26 oil and gas industry standards including "Standard for Investigation Methods of Corrosion and Protection of Steel Pipelines and Storage Tanks"
To all relevant units:
"Standard for Investigation Methods of Corrosion and Protection of Steel Pipelines and Storage Tanks" and other 26 oil and gas industry standards (draft) have been approved after investigation and are now approved as oil and gas industry standards and are hereby released. The numbers and names of the various standards are as follows: 1
SY7T 008795
SY/T 0545-1995
SY 7 T 4013-95
SY/T 404195
SY / T 408495
SY T 4085---95
Standard for investigation method of corrosion and protection of steel pipelines and storage tanks
Determination of thermal characteristic parameters of wax precipitation in crude oil
Scanning calorimetry
Technical standard for anti-corrosion layer of polyolefins on steel pipelines in the spring land (replaces SYJ4013·87)
Specification for installation and acceptance of wet steam generators for oil fields (replaces SY1404189)
Technical specification for environmental conditions and loads in coastal areas
Technical specification for oil and gas gathering and transportation in coastal oil fields
SY T 4086--95
SY/ T 4087-95
SY /T 408895
SY /T 4089---95
SY /T 409095
SY 7 T 4091--95
SY T 4092 .95
SY/ T 4093 --95
SY / T 4094-95
SY/ T 4095 --95
SY T 4096-95
SYT 409795
SY7T 4098
SY/T 409995
SY/T 4100-95
SY /T 410195
SY/T 410295
SY/T 4103—1995
SY 4104—95
SY T 0088--95
Technical specification for design and construction of pipeline network on beach and sea structures
Technical specification for ventilation and air conditioning in beach and sea petroleum projectsTechnical specification for water supply and drainage in beach and sea petroleum projectsElectrical specification for beach and sea petroleum projects
Technical specification for power generation facilities in beach and sea petroleum projectsTechnical specification for corrosion protection in beach and sea petroleum projects
Technical specification for thermal insulation in Weihai petroleum projects
Technical specification for selection and installation of cranes on beach and sea petroleum facilities
Technical specification for design and construction of shallow-water steel fixed platform structureswww.bzxz.net
Technical specification for design and construction of shallow-water steel mobile platform structures
Wellhead of beach and sea oil fields Technical Specifications for Protection Devices Technical Specifications for the Design and Construction of Slope-type Sandstone Artificial Island Structures in Beaches
Technical Specifications for the Design and Construction of Steel-formed Concrete Artificial Island Structures in Beaches
Technical Specifications for the Design and Construction of Beach Seawalls
Technical Specifications for Beach Engineering Survey
Technical Specifications for Beach Geotechnical Engineering Investigation
Specifications for the Inspection and Installation of Valves
Welding and Acceptance of Steel Pipelines
Quality Inspection and Assessment Standards for Petroleum Construction Projects Pipeline Crossing Projects
Technical Standards for Cathodic Protection of the Bottom and External Wall of Steel Storage Tanks
The above standards shall come into force on June 1, 1996. China National Petroleum Corporation
18th November, 1995
1.0.1 This specification is formulated to standardize the design and construction of wellhead protection devices for beach oil, and to ensure safety, reliability, advanced technology, economical and practical, and environmental protection. 1.0.2 This specification applies to the design and construction of wellhead protection covers for petroleum development projects in coastal areas. Wellhead protection devices can protect oil, gas and water wells in coastal areas from environmental loads, loads or accidental loads, and provide appropriate operating areas for parallel port operations when necessary. Its structural types can be divided into jacket type, single pile type, gravity type, etc.
1.0.3 The design and construction of parallel port protection devices should take into account environmental conditions and construction characteristics.
1.0.4 Reference standards
SY 2T 4084--95
SYT 409195
SY/T 4094--95
Technical specification for environmental conditions and loads in Weihai
Technical specification for anti-corrosion of Xionghai oil projects
Technical specification for structural design and construction of shallow-water fixed platforms
SY5747--1995 Safety rules for offshore oil construction China Classification Code for Classification and Construction of Offshore Fixed Platforms, 1992 edition Ministry of Communications of the People's Republic of China Technical Code for Port Engineering, 1987 edition 1.0.5 In addition to complying with this code, the design and construction of wellhead protection devices in offshore oil fields shall also comply with the provisions of the relevant current national standards (specifications). 2 Environmental conditions and loads
21 General provisions
2.1.1 In the design, all kinds of loads that may affect the structure of the wellhead protection device or the size of the structural components should be considered. In addition to the main loads specified in this chapter, the wellhead protection device structure may also be subject to deformation loads caused by uneven settlement, temperature changes and fluctuations, as well as accidental loads caused by collision, falling objects, explosions, etc. 2.1.2 In addition to complying with the provisions of this code, the environmental conditions and loads of the wellhead protection device shall also comply with the relevant provisions of the Technical Specifications for Beach Environmental Conditions and Loads. 2.2 Environmental conditions
Natural environmental conditions
2.2.1.1 The natural environmental conditions that should be considered for the wellhead protection device include: wind, waves, tides, currents, ice, earthquakes, fog, temperature, foundation soil, marine erosion, marine organisms, etc.
2.2.2 Design environmental conditions
2.2.2.1 Working environmental conditions: refers to the environmental conditions that often occur during the construction and use of the wellhead protection device. The selection of working environmental conditions should be based on the standard of ensuring the normal construction and operation of the wellhead protection device:
2.22.2 Extreme environmental conditions: refers to the severe environmental conditions that rarely occur during the service life of the wellhead protection device. The selection of extreme environmental conditions should be based on the standard of ensuring the safety of the wellhead protection device, and the recurrence period should not exceed 50 years. 2.3 Load classification and load combination principles
2.3.1 Load classification
2.3.1.1 Environmental load: loads caused by natural environmental conditions such as wind, waves, currents, ice, and lightning.
2.3.1.2 Service load: other loads except environmental loads to which the wellhead protection device is subjected during its service life.
23,13 Loads applied and other loads other than environmental loads to which the protective device is subjected during construction.
2.3.2 Load combination principle
According to the selected design environmental conditions, various loads acting on the wellhead protection device when actually possible should be combined according to the most unfavorable situation. Seismic loads should be combined in special combinations.
2.3.2.2 Different design items (such as local component calculation or overall calculation of the structure) or different stages (construction research stage or use stage) of the same wellhead protection device should be combined according to the most unfavorable situation that may actually occur simultaneously. When combining, the influence of water level should be considered.
3 Structural analysis
3.1 Steel structure
3.1.1 Structural analysis should include static analysis and dynamic analysis, and fatigue analysis should be performed when the natural vibration period of the structure is greater than 3s.
3.1.2 Structural analysis should take into account the ship's berthing schedule and, if necessary, drilling and well repair operations. Impact loads.
3.1.3 In addition to complying with the provisions of this code, the structural analysis should also comply with the "Structural Specifications for Shallow Sea Steel Fixed Platforms". 3.2 Concrete structure
3.2.1 During the structural analysis, a calculation model equivalent to the actual structure should be established. The analysis should include static analysis and dynamic analysis. 3.2.2 All structural components should be subjected to strength calculations and structural stability verification.
3.2.3 In addition to complying with the provisions of this specification, the structural analysis shall also comply with the relevant provisions of the "Offshore Fixed Platform Manning and Construction Specifications" and the "Port Engineering Technical Specifications". 4 Structural design
4.1 Materials and anti-corrosion
4.1.1 The material selection of the steel structure wellhead protection device shall comply with the relevant provisions of the "Shallow Sea Steel Fixed Platform Design and Construction Technical Specifications". 4.1.2 Concrete structure wellhead protection device The material selection shall comply with the relevant provisions of the "Technical Specifications for Port Engineering".
4.1.3 The corrosion protection of the wellhead protection device shall comply with the provisions of the "Technical Specifications for Corrosion Protection of Beach Petroleum Engineering".
4.2 Steel Structure
4.2.1--General Requirements
4.2.1.1 In addition to complying with the provisions of this Code, the structural design of the steel structure wellhead protection cover shall also comply with the relevant provisions of the "Technical Specifications for the Design and Construction of Shallow Sea Steel Fixed Platform Structures".
4.2.1.2 The wellhead protection device and the wellhead watertight casing shall be properly connected.
4.2.2 Structural Requirements
4.2.2.1 The structure should be simple, with reasonable force, to reduce stress concentration, 4.2.2. 2 The load-bearing components and their connections of the structure should not use steel plates, steel pipes or steel sections with a thickness of less than 6mm.
4.2.2.3 According to the different conditions of the structure and load, a parallel protection support system should be designed at the corresponding position to ensure the overall rigidity of the structure, effectively bear and transmit horizontal forces, prevent excessive vibration of the components, avoid the instability of the compression rod, and ensure the stability of the structure during installation.
4.2.2.4 The wall thickness of the ice-resistant part of the parallel protection device should be strengthened. The range of the strengthened wall thickness is between the design low water level and the design high water level. The strengthened thickness should be determined according to the abrasion of ice on steel, but shall not be less than 1.omm
4.2.2.5 The bottom elevation of the deck of the upper structure of the wellhead protection device shall be determined according to the following formula T- H+223H+ A
Where T-deck bottom elevation, m
Water surface elevation at high water level: H. Check the maximum wave height at high water level, m;
A-----surplus height, take 0.21.0ml. 4.3 Concrete structure
General requirements
The structural design ensures its safety and reliability in each stage of manufacturing, transportation, installation, operation, etc. 4.3.1.1
The structural design shall meet the requirements of strength, stiffness, crack resistance and durability. 4.3.1.2
The design safety factor of reinforced concrete and prestressed concrete shall comply with the provisions of Table 4.3.1.
Design safety factor of reinforced concrete and prestressed concrete
Central tension, eccentric tension members
Reinforced concrete
Prestressed concrete
Central compression, eccentric compression members, inclined shear, torsion, local pressure Note: In extreme cases, the safety factor can be calculated by 0.8 of the value in the table, Table 4.3.1
Safety factor
4.3.1.4 In addition to complying with the provisions of this code, the structural design of wellhead protection devices for concrete structures shall also comply with the relevant provisions of the "Technical Code for Port Engineering" and the "Code for Manning and Construction of Offshore Fixed Platforms".
4.3.2 Calculation of crack width or crack resistance
4.3.2, 1 Generally, the crack width of reinforced concrete components should be calculated, and the use of1.
Design safety factor of reinforced concrete and prestressed concrete
Central tension, eccentric tension members
Reinforced concrete
Prestressed concrete
Central compression, eccentric compression members, inclined shear, torsion, local pressure Note: In extreme cases, the safety factor can be calculated by 0.8 of the value in the table, Table 4.3.1
Safety factor
4.3.1.4 In addition to complying with the provisions of this code, the structural design of wellhead protection devices for concrete structures shall also comply with the relevant provisions of the "Technical Code for Port Engineering" and the "Code for Manning and Construction of Offshore Fixed Platforms".
4.3.2 Calculation of crack width or crack resistance
4.3.2, 1 Generally, the crack width of reinforced concrete components should be calculated, and the use of1.
Design safety factor of reinforced concrete and prestressed concrete
Central tension, eccentric tension members
Reinforced concrete
Prestressed concrete
Central compression, eccentric compression members, inclined shear, torsion, local pressure Note: In extreme cases, the safety factor can be calculated by 0.8 of the value in the table, Table 4.3.1
Safety factor
4.3.1.4 In addition to complying with the provisions of this code, the structural design of wellhead protection devices for concrete structures shall also comply with the relevant provisions of the "Technical Code for Port Engineering" and the "Code for Manning and Construction of Offshore Fixed Platforms".
4.3.2 Calculation of crack width or crack resistance
4.3.2, 1 Generally, the crack width of reinforced concrete components should be calculated, and the use of
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.