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The term free point is used to describe the delineating point between the stuck pipe and the free pipe in a pipe string. Every joint of pipe above the free point is free, meaning it can rotate freely and be moved in and out of the hole, provided it was not attached to the remaining joints of stuck pipe below the free point.
Free point: The highest point at which the drill pipe is "free" or not stuck. Free-point tools are designed to measure torque and stretch in tubing, casings, and drill pipes and to provide accurate free pipe indication. A common method which involves deploying a wireline device to estimate the depth at which the pipe string is stuck. The pipe ...
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.
The Simpsons referenced the incident with an episode about Bart Simpson falling and becoming stuck inside a well. [19] Gary Larson's The Far Side drawing dated 15 May 1992 shows "The life and times of Baby Jessica" with a sequence of unfortunate events starting with being stuck in a vertical pipe shaft; however she is fully upright.
A cat had to be rescued by fire crews after getting stuck in a drainpipe. Avon Fire and Rescue said firefighters from Clevedon, Somerset, were called out at about 10.00 GMT on Saturday.
Permanently fitted, rigid voice pipes are still in use and are generally covered with heavy lids to avoid ingress of water. The speaker has to place his mouth in the "horn" or bell-shaped end of the pipe and the receiver has to 'bend an ear' to hear what is being said. Voice pipes have generally been replaced by sound-powered telephones.
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