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2. Pipe recovery operations - Wikipedia

   en.wikipedia.org/wiki/Pipe_recovery_operations

   Key seating occurs when the drill string becomes off-centered in the wellbore, and the pipe collars become caught on a deviation in the wellbore. If the rig is able to move the drill string freely downhole, but every time the drill string is pulled upward it becomes stuck at the same point, then it is likely that the pipe is caught in a key seat.

3. Drill string - Wikipedia

   en.wikipedia.org/wiki/Drill_string

   Drill pipe makes up the majority of the drill string back up to the surface. Each drill pipe comprises a long tubular section with a specified outside diameter (e.g. 3 1/2 inch, 4 inch, 5 inch, 5 1/2 inch, 5 7/8 inch, 6 5/8 inch). At each end of the drill pipe, tubular larger-diameter portions called the tool joints are located.

4. Drill pipe - Wikipedia

   en.wikipedia.org/wiki/Drill_pipe

   The drill string consists of both drill pipe and the bottom hole assembly (BHA), which is the tubular portion closest to the bit. The BHA will be made of thicker walled heavy weight drill pipe (HWDP) and drill collars, which have a larger outside diameter and provide weight to the drill bit and stiffness to the drilling assembly.

5. Jill Jacobson, known for roles in 'Star Trek' and 'Falcon ...

   www.aol.com/jill-jacobson-known-roles-star...

   Jill Jacobson, a longtime television actress known for roles on "Star Trek: The Next Generation" and the primetime soap opera "Falcon Crest," has died. She was 70. Jacobson died Dec. 8 in Los ...

6. New Orleans attacker discussed plans to kill his family and ...

   www.aol.com/army-vet-worked-real-estate...

   In a series of videos, the man responsible for the deadly New Year’s attack in New Orleans discussed planning to kill his family and having dreams that helped inspire him to join ISIS, according ...

7. Would a government shutdown affect mail delivery? What to know

   www.aol.com/news/government-shutdown-affect-mail...

   With a potential government shutdown looming ahead of the holidays, here's what you need to know if mail services will be impacted by it.

8. Create and manage an AOL Mail account - AOL Help

   help.aol.com/articles/aol-mail-account-and-password

   Go to the main AOL page.; Click Sign in in the upper right hand corner.; Click Create an account at the bottom of the screen.; Enter and submit the requested information.

9. Casing (borehole) - Wikipedia

   en.wikipedia.org/wiki/Casing_(borehole)

   With the casing set depths determined, hole sizes and casing sizes must follow. The hole drilled for each casing string must be large enough to accommodate the casing to be placed inside it, allowing room for cement between the outside of that casing and the hole. Also, subsequent bits that will continue drilling obviously must pass through ...