scope:

1 Scope

1.1 This specification was formulated to provide the minimum acceptable requirements for Subsurface Safety Valve (SSSV) Equipment.

1.2 To be qualified in accordance with this specification, SSSV Equipment shall meet all the applicable requirements of this specification.

1.3 COVERAGE

This specification covers Subsurface Safety Valves, Safety Valve Locks, Safety Valve Landing Nipples, and all components that establish tolerances and/or clearances which may affect performance or interchangeability of the SSSV Equipment. Safety Valve Locks, Safety Valve Landing Nipples and SSSVs manufactured by different facilities or Manufacturers may be supplied as separate items.

1.4 CLASS OF SERVICE

SSSV Equipment manufactured in accordance with this specification shall conform to one or more of the following classes of service:

Class 1. Standard Service. This class of SSSV Equipment is intended for use in wells which do not exhibit the detrimental effects caused by sand or corrosive agents.

Class 2. Sandy Service. This class of SSSV Equipment is intended for use in wells where a substance such as sand could be expected to cause SSSV Equipment failure. Class 2 SSSV Equipment must also meet the requirements for Class 1 service.

Class 3. Stress Corrosion Cracking Service. This class of SSSV Equipment is intended for use in wells where corrosive agents could be expected to cause stress corrosion cracking. Class 3 equipment must meet the requirements for Class 1 or Class 2 and be manufactured from materials which are resistant to stress corrosion cracking. Within this service class there are two divisions, 3S for sulfide stress cracking service and 3C for chloride stress cracking service. Metallic materials, suitable for a 3S environment, shall be in accordance with NACE MR0175.

Class 4. Weight Loss Corrosion Service. This class of SSSV Equipment is intended for use in wells where corrosive agents could be expected to cause weight loss corrosion. Class 4 equipment must meet the requirements for Class 1 or Class 2 and be manufactured from materials which are resistant to weight loss corrosion.

1.5 APPENDICES

Appendices are for information only.