Knowing Subsurface Safety Valve- API14A

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<strong>Safety</strong>-<strong>Valve</strong> Operations Modern safety valves are an integral part of systems that protect almost all offshore production installations and a growing number of land based facilities. These systems protect people and the environment, and limit unwanted movement of produced fluids to the surface. As insurance against disaster, they must lie essentially dormant for extended periods, but be operational when needed. Development of today’s sophisticated valves occurred in distinct steps. Charlie Chong/ Fion Zhang https://www.slb.com/~/media/Files/resources/oilfield_review/ors02/win02/p52_64.pdf
Early subsurface safety valves were actuated by a downhole change in production flow rate. A flow tube in such valves is equipped with a choke bean, which is a short, hard tube that restricts flow, creating a differential pressure between the top and bottom of the tube. Production fluid flowing through this choke creates a differential pressure across the bean—the pressure on the lower face of the choke bean is higher than the pressure on the upper face. When the force on the lower face exceeds the combination of pressure on the upper face and the force of the power spring holding the valve open, the flow tube moves up and allows the flapper to hinge into the flow stream and close against a seat, sealing off flow. The flow rate to close the valve can be set during manufacture by spring and spring-spacer selection and by adjusting the hole size through the bean. Charlie Chong/ Fion Zhang https://www.slb.com/~/media/Files/resources/oilfield_review/ors02/win02/p52_64.pdf
Page 1 and 2: Knowing Subsurface Safety Valve Equ
Page 3 and 4: Charlie Chong/ Fion Zhang Fion Zhan
Page 5 and 6: The Magical Subsurface Safety Valve
Page 7 and 8: Subsurface Safety Valve (SSSV) Down
Page 9 and 10: Well Completion Charlie Chong/ Fion
Page 11 and 12: Part 1: Knowing Subsurface Safety V
Page 13 and 14: Subsurface Safety Valve (SSSV) Char
Page 15 and 16: Subsurface safety systems provide e
Page 17 and 18: Hurricane Lili Charlie Chong/ Fion
Page 19 and 20: This analysis should consider these
Page 21 and 22: The need for a new and more reliabl
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Page 25: The International Organization for
Page 29 and 30: Typical subsurfacecontrolled safety
Page 32: A new type of valve became necessar
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Page 62: After actuation - After an incident
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Conveyance systems - There are two
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Slick Line retrievable Surface Cont
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Charlie Chong/ Fion Zhang https://w
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Slickline- Retrievable SCSSV https:
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Surface Controlled SSV- Flapper Typ
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Weatherford Slickline Retrievable S
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A ScaleGard treatment imparts the s
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The safety-valve control fluid must
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Heavy-wall Flow Couplings Turbulent
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Bruce field Charlie Chong/ Fion Zha
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Optimizing Flow Safely A systems ap
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TRM-4PE safety-valve assembly used
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For higher gas flow-rate conditions
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Gas Slam Testing * The specified AP
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Valve-System Considerations Since t
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Advances in materials science and c
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These more extreme applications req
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Similarly, designing valves for HPH
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Setting Valves at Great Depth The d
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Rod-piston SCSSV. In this valve des
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Higher well pressures and temperatu
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Nansen field, Gulf of Mexico. The N
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TRC-DH safety-valve assembly used i
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Nansen field wellbore diagram. The
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Work on these subsea wells requires
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The need for compact equipment and
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API Specification 14A / ISO 10432 C
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API Specification 14A / ISO 10432 I
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INTERNATIONAL STANDARD API Specific
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INSPECTION & TESTING REQUIREMENTS S
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Charlie Chong/ Fion Zhang
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Knowing Subsurface Safety Valve- API14A

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