Cup Packer
A cup packer is a downhole tool that uses elastic cups (typically made of rubber or polyurethane) to create a seal within casing or wellbore walls. It is used for zonal isolation, fluid control, or well testing. Simple in design, it is suitable for temporary sealing operations. Cup packers are primarily used in the following scenarios: 1.Oil and Gas Well Testing: Temporarily isolate zones for pressure testing or fluid sampling. 2.Drilling Operations: Seal off different formations during drilling to prevent fluid cross-flow. 3.Workover and Completion: Used for well cleaning, cement squeezing, or temporary zone isolation. 4.Water Injection and Acidizing: Isolate target zones for directed injection or acid treatment. 5.Shallow to Medium-Depth Wells: Suitable for temporary operations in shallow or medium-depth wells due to limited pressure resistance.
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- SKU: 80
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Term: Cup Packer
Explanation:
A Cup Packer is a type of downhole tool used to isolate sections of the wellbore. It is characterized by its sealing elements, which are shaped like inverted cups (or bowls).
Cup: Refers to the elastomeric (e.g., rubber, polyurethane) sealing elements. These cups are designed so that downward movement or applied pressure causes the lip of the cup to expand radially and create a seal against the casing or open hole wall.
Packer: A general term for any device used in oil and gas operations to isolate and seal zones within a wellbore, either between the tubing and casing or between the casing and the formation.
How it Works:
Cup packers are usually compression-set. They are run into the well on a tubing string. When weight is set down on the tool or pressure is applied from the surface, the cup elements compress and deform outward, forming a tight seal. They are often unset simply by lifting the tubing string.
Primary Applications:
Drill-Stem Testing (DST): Commonly used as the primary封隔器 in DST tools to temporarily isolate a formation zone for sampling and pressure transient testing.
Cementing Operations: Used as a temporary plug, such as on a casing shoe, to facilitate cement placement.
Squeeze Cementing: Isolating a specific zone that requires remedial cementing.
Workover & Completion: Used for simpler, short-term zonal isolation jobs where more complex permanent packers are not needed.
Key Characteristics:
Simple and Economical: They have a relatively simple design compared to permanent or retrievable packers.
Temporary: Generally designed for short-term applications.
Unidirectional Sealing: The cup design typically provides sealing in one direction (e.g., holding pressure from below). Multiple cups can be stacked for bidirectional sealing.
Related Terms/Synonyms:
While "Cup Packer" is the most precise term, it can sometimes be referred to more generally within these categories:
Retrievable Packer (as it is usually retrieved after use).
Test Packer (highlighting its common use in testing).
Straddle Packer (if two cup packers are used together to isolate a specific zone from above and below).