Podcast
Questions and Answers
What happens if too little torque is applied during makeup?
What happens if too little torque is applied during makeup?
- The drill pipe becomes too heavy
- Connections may over tighten (correct)
- Connections stay secure during drilling
- Drilling operations become more efficient
Applying too much torque can cause mushrooming and pin breakage.
Applying too much torque can cause mushrooming and pin breakage.
True (A)
What is the benefit of using heavy weight drill pipe?
What is the benefit of using heavy weight drill pipe?
It reduces drilling costs and eliminates drill pipe failures.
Heavy weight drill pipe has a wall thickness that results in a body weight ______ times greater than regular drill pipe.
Heavy weight drill pipe has a wall thickness that results in a body weight ______ times greater than regular drill pipe.
Match the following benefits of heavy weight drill pipe with their descriptions:
Match the following benefits of heavy weight drill pipe with their descriptions:
What is a major consequence of running loose connections during drilling?
What is a major consequence of running loose connections during drilling?
Heavy weight drill pipe is only effective in deep drilling operations.
Heavy weight drill pipe is only effective in deep drilling operations.
How does heavy weight drill pipe provide savings in directional drilling costs?
How does heavy weight drill pipe provide savings in directional drilling costs?
Mushrooming of box shoulders can be caused by ______ torque.
Mushrooming of box shoulders can be caused by ______ torque.
What type of wrench is referenced in relation to over torque issues?
What type of wrench is referenced in relation to over torque issues?
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Study Notes
Drill String
- A drill string is a critical part of the rotary drilling process, connecting the rig to the drill bit.
- It provides a fluid conduit from the rig to the bit, imparts rotary motion to the drill bit, allows weight to be set on the bit, and lowers and raises the bit in the well.
Duties of Drill String
- Provides stability to the bottom-hole assembly to minimize vibration and bit jumping.
- Allows formation fluid and pressure testing through the drill string.
- Permits through-pipe formation evaluation when logging tools cannot be run in the open hole.
Components of Drill String
Kelly
- Transmits rotary motion generated from the rotary table to the drill string via the kelly bushing.
- Has been replaced by TD systems.
Drill Pipe (DP)
- The longest section of the drill string.
- Classified according to API, with factors including length, minimum yield strength, and wear.
- Available in several sizes and weights, with aluminum drill pipe used in special projects.
DP Classification
- Length: Classified into ranges, including 18 ft – 22 ft, 27 ft – 30 ft, and 38 ft – 45 ft.
- Minimum Yield Strength: The point where the tubular goes to Plastic Deformation zone from Elastic deformation zone.
- DP Make-up Torque: The recommended amount of torque to apply when tightening drill pipe, depending on connection, inside diameter of the pin, and outside diameter of the box.
Heavy Weight Drill Pipe (HWDP)
- Reduces drilling cost by virtually eliminating drill pipe failures in the transition zone.
- Significantly increases performance and depth capabilities of small rigs in shallow drilling areas.
- Provides substantial savings in directional drilling costs by replacing the largest part of the drill-collar string, reducing downhole drilling torque, and decreasing tendencies to change direction.
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