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53 Cards in this Set
- Front
- Back
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What is a no-go nipple?
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It is a nipple with a smaller/restricted bore. It prevents the intervention tool from running any further.
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What is the primary purpose of a no-go nipple?
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Its main purpose is to locate the profile of the tool.
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How does the lock mandrel lock?
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It is the combination of lock keys/dogs (45 and 90 deg) and a matching profile.
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How does a lock mandrel seal?
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It seals using elastomeric packing.
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What is the primary purpose of a nipple?
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Its primary purpose is to receive flow control devices.
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What are the packer types?
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Permanent and retrievable.
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How do you retrieve a retrievable packer?
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It is attached to the completion tubing. Pull out the completion/tubing.
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How is a permanent packer removed?
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It is attached to the casing. It needs to be milled out.
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Where is the packer located?
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Above the top perforation.
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Where is the Sliding Side Door (SSD) located?
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Above the packer.
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What happens to the tubing when flowing the well?
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It expands and becomes longer.
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What happens to the tubing when pumping chemical injection?
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It contracts and becomes shorter.
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What happens to the tubing when pressure testing from inside?
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It balloons and becomes shorter.
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What happens to the tubing when pressure testing from outside?
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It reverse-balloons and becomes shorter.
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What precautions must you take before setting a sleeve (SSD)?
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Equalize the pressure and make sure it is fully open or fully closed.
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What is SPM?
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Side pocket mandrel.
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What is an side pocket mandrel (SPM) used for?
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It is used for circulating between the annulus and the tubing.
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If we run an SPM and do not want to circulate, what do we do?
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We install a dummy valve in the pocket.
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If we run an SPM and we want to circulate, what do we do?
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We remove the dummy valve and install a circulating valve.
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When we stop circulation on the SPM, what prevents the hydrocarbons from entering from the annulus?
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Check valves.
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Name two methods for temporary circulation.
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Side pocket mandrel (SPM) and sliding side door (SSD).
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When should sub-surface safety valves be used?
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They are only used in emergencies.
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What is the normal state of a sub-surface safety valve (fail safe)?
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Normally closed.
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Where can a sub-surface safety valve hold pressure from?
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Only from below so we can pump-through.
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What are the two types of sub-surface safety valves?
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Wireline retrievable and tubing retrievable.
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What are the advantages and disadvantages of a tubing retrievable valve?
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Advantage: same bore as tubing so we have higher flow.
Disadvantage: we have to kill the well if we want to retrieve it. |
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What are the advantages and disadvantages of a wireline retrievable valve?
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Advantage: can be retrieved at any point without killing the well.
Disadvantage: has a smaller bore than the tubing which restricts the flow. |
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How do you hold a tubing retrievable valve open when RIH?
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Using control line pressure or a straddle.
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How do you hold a wireline retrievable valve open when RIH?
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Using a running tool and prong.
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How would you open a sub-surface controlled valve that is closed?
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Equalize the pressure.
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How does an ambien/differential valve close?
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Change in ambient/surrounding pressure.
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If a tubing retrievable valve fails, do we need to kill the well?
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No, we lock the tubing valve open and we insert an insert valve.
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At what depth do we set a safety valve?
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Below a depth where damage could occur to the valve from surface impact or explosion.
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At what point during running of the valve (wireline) would we see control line pressure at the surface?
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When the seals are in place (both) inside the nipple.
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What is the primary purpose of the annulus safety valve?
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Prevent flow of gas from the annulus in a gas lift completion.
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What is the primary purpose of a tubing hanger?
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Suspend the weight of the tubing/completion.
Isolate the tubing from the casing. Provide a profile for a barrier or plug. |
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What can constitute a barrier?
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Anything that prevents flow. Check valves and anything ending in "plug."
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What does the term 6BX mean?
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It is a type of flange with a metal ring gasket.
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What is test pressure for a tree?
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Usually 1.5 times working pressure.
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Which valves on a tree are working valves and which are safety valves?
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The upper master valve is a working valve. The lower master valve is kept open and in good condition.
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Which master valve cuts wireline?
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Some of them (special requirements must be in place).
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What is the cross?
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It is the block between the swab, master, chocke, and kill valves.
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What is the primary purpose of the lower nipple?
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It is used for gauges since it is below the perforated joint and it cannot seal the well.
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What is the primary purpose of the middle nipple?
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It is used for setting the packer and plugs. It is the first barrier.
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What is the primary purpose of the upper nipple?
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It is used to set plugs for pressure testing and circulating. It is the second barrier.
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What is the main purpose of the flow coupling?
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It is to reduce turbulent flow.
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What does "X" stand for in nipple naming?
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It stands for selective (made by Halliburton). We can choose which one to choose since the bore is not restricted.
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What does "XN" stand for in nipple naming?
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It is a nipple that has a no-go for locating the flowing tool.
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What is the main purpose of a packer?
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Isolating hydrostatic.
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What is the kick-over tool?
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It is a tool used for setting and pulling valves from the side pocket on the SPM.
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What are some other names for sub surface controlled safety valves?
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Ambient, differential, and storm chokes.
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What are some types of check valves?
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One way pressure valve and two way pressure check valve.
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Does the swab valve shut off flow from the well?
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No, it needs the choke and kill valves to be closed as well.
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