Questions and Answers
Which control line is used to operate the subsurface safety valves (SSVs)?
Hydraulic pressure line
What is the main function of a packer in a well completion process?
To provide a seal between production casing and tubing
What happens to the SCSSV (Subsurface safety valve) when there is something wrong with the surface equipment?
It closes automatically
What keeps the packer open during normal fluid flow in the well?
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Which part of the tubing string is responsible for protection against well pressure and corrosion?
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What is the primary purpose of gas lift gas valves in a well completion process?
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'Retrievable' and 'Permanent' are types of which component in the well completion process?
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'SSSV' stands for:
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Study Notes
Functions of Tubing
- Used for production
- Acts as a killing string
- Used for injection of chemicals
- Can accommodate gas lift gas valves to assist well liquids to the surface (gas lifting process)
Considerations for Tubing in Completion
- Tubing strength
- Tubing connection
- Tubing movement
Subsurface Safety Valves (SSSV)
- Installed in the tubing string below or near the surface
- Controlled by hydraulic pressure through a capillary (control) line connected to a surface control panel
- Normally closed (failsafe) valve that requires continuous hydraulic pressure to keep it open
- Remains open during normal fluid flow and closes when surface equipment fails
Packers
- A device made of metal and rubber that fits around the tubing
- Provides a seal between the inside of the production casing and outside of the tubing string
- Must not restrict normal production flow
- Types of packers: retrievable, isolation, and production (A- Retrievable, B- Permanent)
- Functions:
- Protects casing from well pressure and corrosion
- Used for subsurface well control
- Used as an anchor for the tubing
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