ISO 28781:2010 pdf free download – Petroleum and natural gas industries一 Drilling and production equipment一 Subsurface barrier valves and related equipment.
7.10.1 General
Each product shall be assembled and functionally tested according to the requirements and acceptance criteria in Annex C and in the user/purchaser-selected Qi or Q2 quality requirements. Additionally, the requirements specified in 7.10.2 shall be performed to verify correct assembly.
7.10.2 Assembly requirements
The following are necessary for proper assembly.
a) Make-up torque values for all sealing connections shall be recorded and verified to be within supplier’s/manufacturer’s documented specifications. End connections are specifically excluded from this requirement.
b) Visual and dimensional (including CD, running CD and ID) inspection of the assembly shall be conducted by a qualified person(s) to ensure conformance to the supplier’s/manufacturer’s specifications.
c) Components of the product not tested in the requirements of Annex C and that require pressure integrity shall be verified by test, by a qualified person(s), to a supplier’s/manufacturer’s procedures to meet the acceptance criteria. The results of the successful pressure integrity test shall be documented and become a part of the product-specific quality record.
7.11 Manufacturing nonconformities
The supplier/manufacturer shall establish and maintain documented procedures to ensure that an assembly or component that does not conform to specified requirements is prevented from unintended use or installation. This control shall provide for the identification, documentation, evaluation, segregation (when applicable) and disposition of nonconforming components or assemblies.
Responsibility for review and authority for disposition of nonconforming assemblies or components shall be defined in procedures established by the supplier/manufacturer and carried out by a qualified person(s).
8 Handling, storage and preparation for transport
Subsurface-barrier-valve products shall be handled and stored according to the documented specifications of the supplier/manufacturer to prevent deterioration.
Subsurface-barrier-valve equipment shall be packaged for transport according to the documented specifications of the supplier/manufacturer to prevent damage to the equipment from normal handling and contamination. All material provided as protection for transport shall be clearly identified for removal prior to equipment use.
Requirements for storage after transport shall be identified in the product operating manual.
A.1 General
This annex provides general information for users/purchasers of subsurface barrier valves to help familiarize them with the capabilities and limitations of these products. Included are possible applications for barrier valves, types, operational capabilities and limitations for barrier valves, and the categories into which barrier valves are organized within this International Standard.
Information is provided on some of the possible benefits of controlling flow and pressure in a well by using barrier-valve technology during the completion installation, and after the completion has been on production or injection for some time.
A.2 Barrier-valve system descriptions
For the purposes of this International Standard, barrier valves are defined as a valve assembly that provides an obstacle or impediment to flow and/or pressure (see 3.52). The scope of this International Standard indicates that a barrier valve is not considered as an emergency or fail-safe flow-controlling safety device. Barrier-valve systems include the primary and secondary operational tools that are designed and tested with the subsurface barrier-valve designs. Consideration shall be given to assuring that the systems are fully compatible with the specific well construction and operational plans for its life cycle.
Valve types A, B and C are typically designed for use during the completion process, after which they become inactive.
Valve types AA, BB and CC are designed for use in pre- and post-production/injection application where they may be actuated more than once, as specified by product design.