Petroleum Engineering: Drillpipe Specifications
30 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the typical length of hole drilled by a piece of drillpipe in soft drilling areas?

  • 250,000 - 280,000 ft
  • 10,000 ft
  • 180,000 - 210,000 ft
  • 220,000 - 250,000 ft (correct)

    • What is the maximum number of wells a piece of drillpipe can be used on, according to the text?

  • 15
  • 20
  • 10
  • 25 (correct)

    • What is the purpose of the non-destructive tests periodically applied to used drillpipe?

  • To assess the wear and strength of the pipe
  • To inspect for defects like cracks
  • To determine the degree of damage or wear
  • All of the above (correct)

    • What is used as the basis to gauge the strength of the drillpipe after inspection?

    <p>Both (a) and (b)</p> Signup and view all the answers

    What is the classification criteria for 'Grade 1 or Premium' drillpipe?

    <p>New pipe or used pipe with at least 80% of the original wall thickness remaining</p> Signup and view all the answers

    What is the typical length of hole drilled by a piece of drillpipe in hard or deviated drilling areas?

    <p>180,000 - 210,000 ft</p> Signup and view all the answers

    What is the purpose of Table 2 when using drillpipe specifications?

    <p>To provide the nominal weight and dimensions of the drillpipe</p> Signup and view all the answers

    How is the weight of the drillpipe affected when it is suspended in the borehole?

    <p>The weight is decreased due to the buoyant force of the drilling fluid</p> Signup and view all the answers

    What is the formula used to calculate the 'Wet Weight' of the drillpipe when suspended in the borehole?

    <p>Wet Weight = Weight in Air x Buoyancy Factor</p> Signup and view all the answers

    Where can the buoyancy factor for a particular density of drilling fluid be found?

    <p>In Table 15</p> Signup and view all the answers

    What is the purpose of calculating the 'Wet Weight' of the drillpipe?

    <p>To determine the true weight of the drillpipe when suspended in the borehole</p> Signup and view all the answers

    What is the weight in air of a 30ft joint of 5" 19.5 lb/ft Grade G drillpipe with 4 1/2" IF connections?

    <p>585 lbs</p> Signup and view all the answers

    What is the relationship between the I.D. of the tooljoint and the I.D. of the main body of the pipe?

    <p>The I.D. of the tooljoint is less than the I.D. of the main body of the pipe.</p> Signup and view all the answers

    What is the purpose of the shoulder-to-shoulder connection in the tool joint?

    <p>It forms the seal.</p> Signup and view all the answers

    What is the purpose of the tapered shoulders on the tool joint boxes and pins?

    <p>To help distribute the load more evenly across the connection.</p> Signup and view all the answers

    What is the main purpose of using heavy wall drillpipe (HWDP)?

    <p>To handle the increased stresses at the base of the drillstring.</p> Signup and view all the answers

    What can happen if the tool joint connections are engaged too harshly?

    <p>It can damage the threads on the tool joint.</p> Signup and view all the answers

    What is the recommended practice to extend the life of tool joints?

    <p>Grease the connection properly and apply a steady torque when making it up.</p> Signup and view all the answers

    What is the main function of stabilisers in vertical holes?

    <p>Reduce the weight on bit (WOB)</p> Signup and view all the answers

    When should stabilisers usually be replaced?

    <p>When they become 1/2&quot; undergauge</p> Signup and view all the answers

    What is the function of a roller reamer?

    <p>Maintain gauge hole</p> Signup and view all the answers

    Where is a shock sub typically located?

    <p>Above the drill bit</p> Signup and view all the answers

    What material are the rollers in a roller reamer typically made from?

    <p>High-grade carburised steel</p> Signup and view all the answers

    What is the angle of each blade of the stabilisers used in drilling operations?

    <p>140 degrees</p> Signup and view all the answers

    What is the purpose of a shock sub?

    <p>To absorb vertical vibrations using a steel spring or rubber element</p> Signup and view all the answers

    What is the function of subs (substitutes)?

    <p>To connect components with different thread types or sizes</p> Signup and view all the answers

    Which of the following tools is used to deliver a sharp blow to free stuck pipe?

    <p>Drilling jar</p> Signup and view all the answers

    What is the difference between hydraulic jars and mechanical jars?

    <p>Hydraulic jars are activated by a straight pull and give an upward blow, while mechanical jars are preset at the surface to operate when a given compression load is applied and give a downward blow</p> Signup and view all the answers

    Where are jars typically positioned in the drill string?

    <p>At the top of the drill collars</p> Signup and view all the answers

    Which component of the drill string is shown in Figure 12?

    <p>Shock sub</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser