Rabbit

Test Your Knowledge

Quiz: The Rabbit in Drilling and Well Completion

Instructions: Choose the best answer for each question.

1. What is a "rabbit" in drilling and well completion terminology? a) A type of drilling fluid additive b) A tool used to clean the bottom of the well c) A small, weighted drift dropped through tubulars before joint makeup d) A type of drilling bit

2. Why is a rabbit used in drilling and well completion? a) To lubricate the drill string b) To measure the depth of the well c) To clear debris from inside the tubulars d) To prevent the drill string from collapsing

3. Which type of rabbit is best suited for delicate operations? a) Steel rabbit b) Plastic rabbit c) Magnetic rabbit d) All types are equally suitable

4. What is one of the benefits of using a rabbit in drilling and well completion? a) Reduces the need for casing strings b) Increases the rate of penetration c) Minimizes equipment damage d) Eliminates the need for mud

5. What is the primary reason a rabbit contributes to a safer working environment? a) By reducing the need for heavy lifting b) By eliminating the need for manual cleaning c) By ensuring a secure joint connection d) By preventing the drill string from rotating

Exercise: Choosing the Right Rabbit

Scenario: You are preparing a joint connection for a 13 3/8" casing string. The drilling mud used in the well is oil-based, and the connection involves delicate thread engagement.

Task: Choose the most appropriate type of rabbit for this specific scenario, providing a brief justification for your choice.

Techniques

Chapter 1: Techniques

The Art of Dropping the Rabbit: A Detailed Guide

This chapter dives into the specific techniques employed when using a rabbit during drilling and well completion operations.

1.1 Preparation is Key:

• Inspect the Rabbit: Before dropping the rabbit, ensure it's free of damage and its weight is suitable for the pipe size.
• Lubricate the Rabbit: Applying a light coating of grease or oil to the rabbit reduces friction and allows for easier passage through the tubulars.
• Clear the Area: Ensure the rig floor is clear of any obstructions that could interfere with the rabbit's descent.

1.2 Dropping the Rabbit:

• The Method:
  • Use a designated dropper or a sturdy piece of pipe to lower the rabbit into the open end of the tubular.
  • Allow the rabbit to freely fall through the pipe, utilizing its weight to dislodge debris.
• Speed and Control: Avoid dropping the rabbit too quickly, as this can damage the tubular threads. However, ensure a swift enough drop to effectively clear the path.
• Visual Confirmation: After dropping the rabbit, visually inspect the bottom of the pipe to verify the rabbit's successful passage and confirm debris has been removed.

1.3 Retrieving the Rabbit:

• Method: Use a magnetic retrieval tool or a specially designed rabbit retriever to retrieve the rabbit after the pipe joint is made.
• Caution: Handle the retrieved rabbit with care, ensuring it's properly cleaned and stored for future use.

1.4 Special Considerations:

• Delicate Tubing: When working with delicate tubing, use a lighter rabbit, possibly a plastic or magnetic version, to minimize the risk of damage.
• Difficult-to-Reach Locations: In situations where the rabbit can't be dropped from the top, consider alternative methods like using a smaller rabbit with a string attached or a dedicated tool designed for clearing obstructed tubulars.

1.5 Conclusion:

By mastering the techniques of dropping, retrieving, and selecting the appropriate type of rabbit, operators can ensure a clear and unobstructed path for pipe connections, maximizing efficiency and minimizing risks during drilling and completion operations.