Nozzle & Choke Comparison

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Example 2•AA bit dressed with six 12 jets is replacedby a bit with six 10 jets•102 /12 2 =.69•The TFA of the second bit is 69% that ofthe first bit

Early West Texas Drilling and Evaluation Technology

Fishing Techniques for Drilling Operations

Example•AA bit dressed with three 22 jets replacesa bit with three 20 jets. How much moreflow can be expected?•222 /20 2 =1.21•21%more flow can be expected from the22 jets with the same standpipe pressure•Of course, pump SPM must be raisedaccordingly

Example 2•AA bit dressed with six 12 jets is replacedby a bit with six 10 jets•102 /12 2 =.69•The TFA of the second bit is 69% that ofthe first bit

Page 1 and 2: Nozzle & ChokeComparisonQuick Calcu
Page 3 and 4: Nozzle & ChokeMeasurement•Bit Noz
Page 5: Conclusion•The square of the nomi

Nozzle & Choke Comparison

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