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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. Bottom hole assembly - Wikipedia

   en.wikipedia.org/wiki/Bottom_hole_assembly

   Rotary assemblies [2] are commonly used where formations are predictable and the rig economics are an issue. In such an assembly the weight of the drill collars gives the BHA the tendency to sag or flex to the low side of the hole, collar stiffness length and stabiliser diameter and placement are engineered as a means of controlling the flex of the BHA.

4. Horse harness - Wikipedia

   en.wikipedia.org/wiki/Horse_harness

   A collar is the part which a horse pushes against with its shoulders and chest. The two main designs are the breast collar harness and the full collar harness. A horse collar (or full collar) is a padded loop fitting closely around the horse's neck and resting on its shoulders. Must be correctly sized for each individual horse.

5. List of components of oil drilling rigs - Wikipedia

   en.wikipedia.org/wiki/List_of_components_of_oil...

   Drill bit (#26) is a device attached to the end of the drill string that breaks apart the rock being drilled. It contains jets through which the drilling fluid exits. Drill floor (#21) is the area on the rig where the tools are located to make the connections of the drill pipe, bottom hole assembly, tools and bit. It is considered the main area ...

6. 49ers coach Kyle Shanahan said LB De'Vondre Campbell 'didn't ...

   www.aol.com/sports/49ers-coach-kyle-shanahan...

   The San Francisco 49ers were barely hanging on in the playoff race, and desperately needed a win Thursday night against the Los Angeles Rams to stay afloat.

7. Rare tornado rips through shopping center in Scotts Valley ...

   www.aol.com/rare-tornado-rips-shopping-center...

   A video captured a tornado ripping through a shopping center parking lot in California over the weekend. The Santa Cruz Sentinel reported that the tornado in Scotts Valley on Saturday caused ...

8. Darius Garland scores 24 points for NBA-leading Cavaliers in ...

   www.aol.com/darius-garland-scores-24-points...

   Darius Garland scored 24 points and Jarrett Allen had 21 points and 11 rebounds as the NBA-leading Cleveland Cavaliers beat the Washington 115-105 on Friday night, sending the Wizards to their ...

9. Elevators (drilling rig) - Wikipedia

   en.wikipedia.org/wiki/Elevators_(drilling_rig)

   Elevators, as developed for the drilling industry, are a hinged device with handles that are used to wrap around the tool joint of drill pipe, casing or lift nipples (for collars) to facilitate the lifting or lowering of them singly or of the drill string as a whole.