HWK 4 solution - PGE 203 HWK 4 Solution Due at start of...

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PGE 203 HWK 4 Solution Due at start of lecture: March 1. Read Chapter 4 in the text and review the class notes on drilling. Then answer the following questions. (each worth 1 pt) (1) What are the two main reasons listed in the text that cable tool drilling has been largely replaced by rotary methods? Drilling must stop from time to time to bail rock chips out of the well. It is not possible to keep soft formations from caving in. (2) As listed in the notes, what are the tasks or functions all drilling rigs must accomplish? Next to each function list how the cable tool and then the rotary rig accomplished the task. A way to break rock. Cable tool chips away at the rock by raising and lowering a wedge shaped chisel bit. Rotary rigs rotate a roller cone or drag bit against the bottom of the hole to chip or grind away rock cuttings. A way to remove rock fragments from the well. Cable tool rigs stop drilling and bail the chips out. Rotary rigs circulate drilling fluid continuously to bring the cuttings to the surface. A way to stabilize the hole so that it does not cave in. Cable tool rigs cannot perform this task during drilling. Rotary rigs use the consistency and weight of the drilling mud to stabilize the hole during drilling.
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This note was uploaded on 11/03/2010 for the course PGE 203 taught by Professor Taylor during the Spring '08 term at University of Texas at Austin.

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HWK 4 solution - PGE 203 HWK 4 Solution Due at start of...

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