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2. 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.

3. List of components of oil drilling rigs - Wikipedia

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

   Drill string (#25) is an assembled collection of drill pipe, heavy weight drill pipe, drill collars and any of a whole assortment of tools, connected and run into the wellbore to facilitate the drilling of a well. The collection is referred to singularly as the drill string.

4. Drill string - Wikipedia

   en.wikipedia.org/wiki/Drill_string

   A drill string on a drilling rig is a column, or string, of drill pipe that transmits drilling fluid (via the mud pumps) and torque (via the kelly drive or top drive) to the drill bit. The term is loosely applied to the assembled collection of the smuggler pool, drill collars , tools and drill bit.

5. Tripping (pipe) - Wikipedia

   en.wikipedia.org/wiki/Tripping_(pipe)

   Tripping pipe (or "Making a round trip" or simply "Making a trip") is the physical act of pulling the drill string out of the wellbore and then running it back in. This is done by physically breaking out or disconnecting (when pulling out of the hole) every other 2 or 3 joints of drill pipe at a time (called a stand ) and racking them ...

6. Glossary of oilfield jargon - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_oilfield_jargon

   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.

7. Driller's depth - Wikipedia

   en.wikipedia.org/wiki/Driller's_depth

   Different methods of measuring the drill pipe length also have a significant effect on the accuracy of the measurement made. Pipe "strapping" is commonly used to define drill pipe length, where the pipe is measured on the pipe racks using a (steel) measure tape. These results are noted in a tally book, and the drillstring length is hence defined.

8. Bottom hole assembly - Wikipedia

   en.wikipedia.org/wiki/Bottom_hole_assembly

   A bottom hole assembly (BHA) is a component of a drilling rig.It is the lowest part of the drill string, extending from the bit to the drill pipe.The assembly can consist of drill collars, subs such as stabilisers, reamers, shocks, hole-openers, and the bit sub and bit.

9. Casing (borehole) - Wikipedia

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

   Casing is a large diameter pipe that is assembled and inserted into a recently drilled section of a borehole. Similar to the bones of a spine protecting the spinal cord, casing is set inside the drilled borehole to protect and support the wellstream.