API RP 14B:2005 pdf download
API RP 14B:2005 pdf download.Design, Installation, Repair and Operation of Subsurface Safety Valve Systems.
5.2.2.4 Wellheaditublng hanger passages and connectors
Passages/connectors shall have the following characteristics/considerations:
a) the verified pressure rating shall be equal to or greater than the highest anticipated control-system operating pressure:
b) specific consideration shall be given to minimum passages being equal to or greater than the control line:
C) materials shall be compatible with the production environment and other fluids that may come in contact;
d) specific consideration shall be given to seal material applications for working pressures equal to or greater than 68,9 MPa (10 000 psi):
e) the design and location of the wellhead outlet for the control line may indude a valve for dosure and isolation of the individual well from the control system. This valve shall be maintained in the open position during nonnal operations and it shall be readily identified when dosed, since its closure will render the SCSSV inoperative.
5.2.2.5 Control-line protectors
Control-line protectors should be used to protect the control line from possible damage (abrasion, flattening, etc.) that could occur during running/pulling operations after connecting the control line. When used, at least one protector for each tubing joint is recommended. The cross-coupling types are recommended to prevent the protector from moving on the tubing joint. Protectors shall have dimensions compatible with the tubing size and connection, with the control-line size and type, and with the casing drift.
5.2.2.6 Control fluid
The requirements of 5.3.1.6 on control fluid selection apply.
5.2.2.7 SSSV
SSSVs shall be selected that have been verified as being compatible with the dimensions and configurations of: tubing and auxiliary conduit connections; tubing and casing drift diameters: related permanent well equipment and well-servicing tools; control or other fluids in contact with the equipment.
Well effluents and producing characteristics are principal factors in selection and design.
Scale, paraffin and hydrate deposition affect closure performance and should be carefully considered in
detecminwg the setting depth, especially for SSCSVs.
5.2.28 Flow couplings
Flow entrance effects can have an affect on SSSV performance. To reduce the resultant effects of turbulence during production, flow couplings should be considered an Integral part of the tubing string, both upstream and downstream of the SSSV. Flow couplings should be compatible with the ID of the SSSV for an ample length prior to the SSSV entrance and at the exit. Typical Industry practice has been to provide a minimum of 0,9 m (3 ft) in length provided it exceeds 8 to 10 times the ID of the tubing. In the case of TR-SCSSV installations, flow coupling length should take into account future insert valve installations.
5.2.2.9 Lock mandrels, safety valv, landing nipples, sealing devices and related tools
Lock mandrels. safety valve landing nipples, sealing devices, running tools and related equipment shall be verified as compatible with the dimensions and configurations of related permanent well equipment and well- servicing tools. Installations and retrievals shall meet the requirements Identified in the manufacturer’s operating manual and, where applicable, the documented procedures of the user/purchaser as specified in ISO 16070.
Prior to installation, the opening and dosing hydraulic pressures (or operating loads) shall be verified according to the specific manufacturer’s operating manual. Ensure that the SCSSV will function fail-safe at the planned setting depth before installation by calculation of FSSD in accordance with the manufacturers operating manual.
It is recommended that SSSV system components be functionally tested prior to installation. Annex S offers guidelines for performing this process.
5.2.3 System test
5.2.3.1 General
When installed, the SSSV system equipment shall be tested by qualified personnel to ensure proper operation. System evaluation procedures shall include testing procedures, acceptance criteria, and documentation requirements.
&2.3.2 Surface control system
To assure performance of the surface control system within the design limits, the manulacturers)operators prescribed operating procedures shall be followed. See Annex C for further recommendations and guidelines on operations
The surface control system shall be tested at a maximum interval of every six months, with consideration given to no-flow conditions, unless local regulations, conditions andior documented historical evidence indicate a different testing frequency.
To test the system, operate an ESD valve. The system tests successfully when all SCSSVs close after the prescribed delay.
5.2.3.3 SCSSV
The opening and closing hydraulic pressures, mechanical actuation, closure-mechanism integrity and other foatures shall be verified according to the manufacturer’s operating manual prior to valve installation.
