Podcast
Questions and Answers
In the hold section, what does TVD stand for?
In the hold section, what does TVD stand for?
What is the total measured depth (MD) for the hold section in Table (5-15) of Example (5-10)?
What is the total measured depth (MD) for the hold section in Table (5-15) of Example (5-10)?
How much is the horizontal departure for the hold section?
How much is the horizontal departure for the hold section?
Which section of the well involves going from the target to total depth through enough room for shoe joints?
Which section of the well involves going from the target to total depth through enough room for shoe joints?
Signup and view all the answers
What does the term 'build' refer to in the hold section data?
What does the term 'build' refer to in the hold section data?
Signup and view all the answers
What is the purpose of drawing a vertical section and horizontal plan view of the well?
What is the purpose of drawing a vertical section and horizontal plan view of the well?
Signup and view all the answers
What is the purpose of the Hold Section in a wellbore?
What is the purpose of the Hold Section in a wellbore?
Signup and view all the answers
In what type of section is the inclination reduced in a wellbore?
In what type of section is the inclination reduced in a wellbore?
Signup and view all the answers
Why is it mentioned that not all wells have a Drop Section?
Why is it mentioned that not all wells have a Drop Section?
Signup and view all the answers
Which method was described as relatively simple but least accurate in directional surveys?
Which method was described as relatively simple but least accurate in directional surveys?
Signup and view all the answers
What does the tangential method assume about the wellbore course?
What does the tangential method assume about the wellbore course?
Signup and view all the answers
Why was it advised not to use the tangential method for calculating directional surveys?
Why was it advised not to use the tangential method for calculating directional surveys?
Signup and view all the answers
What is the main difference in junction construction between Level 3 and Level 4?
What is the main difference in junction construction between Level 3 and Level 4?
Signup and view all the answers
Which method is used to construct the junction in Level 4?
Which method is used to construct the junction in Level 4?
Signup and view all the answers
What is a key feature of junction construction in Level 5?
What is a key feature of junction construction in Level 5?
Signup and view all the answers
What is NOT an essential feature of constructing the junction in Level 5?
What is NOT an essential feature of constructing the junction in Level 5?
Signup and view all the answers
Which level requires mechanical integrity but not hydraulic integrity at the junction?
Which level requires mechanical integrity but not hydraulic integrity at the junction?
Signup and view all the answers
What is a primary design consideration for junction construction in Level 3?
What is a primary design consideration for junction construction in Level 3?
Signup and view all the answers
Study Notes
Directional Drilling
- A well's directional profile can be divided into five sections: Vertical to KOP, Build, Hold, Drop, and Vertical to TD.
- The Hold Section is the portion of the well where the inclination is held constant.
- The Hold Section is represented by a right triangle (Fig. 5-42).
- In the example, the Hold Section has a MD of 5830 feet, a TVD of 5314.21 feet, and a Dep. of 2397.63 feet.
Well Construction
- A junction is constructed by either downhole milling or by installing a pre-milled window joint.
- Level 3: The main bore is cased and cemented, the lateral is cased but not cemented, and mechanical integrity is required at the junction.
- Level 4: The main bore and lateral are both cased and cemented, and the junction is constructed by one of three methods: washover operation, milling, or low-side perforations.
- Level 5: Pressure integrity at the junction is achieved by using completion equipment, and packers are placed above and below the junction and in the lateral.
Survey Calculation Methods
- The tangential method was once widely used but is now considered the least accurate and should not be used to calculate directional surveys.
- The tangential method assumes the wellbore course is tangential to the lower survey station and the wellbore course is a straight line.
- Other survey calculation methods are more accurate and should be used instead of the tangential method.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers the concept of a hold section in drilling engineering II, specifically focusing on Section 5 - Vertical to TD. It includes data related to hole depth, TVD, and a right triangle representation for visualization.