1. What is Coiled Tubing Yield?

Coiled tubing yield refers to the stress point at which coiled tubing begins to deform permanently. It's calculated by dividing the applied force by the cross-sectional area of the tubing.

2. How Does the Calculator Work?

The calculator uses the yield equation:

Where:

• Force — Applied force in pounds (lbs)
• Area — Cross-sectional area in square inches (in²)

Explanation: The equation calculates the stress applied to the coiled tubing material by distributing the force over its cross-sectional area.

3. Importance of Yield Calculation

Details: Calculating yield stress is crucial for determining the maximum safe operating conditions for coiled tubing in oilfield operations, preventing permanent deformation or failure.

4. Using the Calculator

Tips: Enter force in pounds and area in square inches. Both values must be positive numbers. The calculator will compute the yield stress in psi (pounds per square inch).

5. Frequently Asked Questions (FAQ)

Q1: What is typical yield strength for coiled tubing?
A: Common coiled tubing materials have yield strengths ranging from 55,000 psi to 120,000 psi depending on the grade.

Q2: How do I measure the cross-sectional area?
A: For round tubing, area = π × (OD² - ID²)/4, where OD is outer diameter and ID is inner diameter.

Q3: Why is yield stress important in coiled tubing operations?
A: Exceeding the yield stress can cause permanent deformation, reducing the tubing's pressure integrity and fatigue life.

Q4: How does temperature affect yield strength?
A: Yield strength typically decreases as temperature increases, which must be considered in high-temperature applications.

Q5: What safety factor should be applied to yield calculations?
A: Industry standards typically recommend a safety factor of 1.1 to 1.5 depending on the application and regulatory requirements.