DRILLING ENGINEERING

Question 1: (10 marks)

A 13 3/8 rock bit will be used to drill 23 % average formation porosity of a hole section from 6,000 to 6,950 ft depth within 8 hours. The 88% efficiency solid control equipment installed and only 3.2 % of solid content is allowable in the mud system, calculate how much mud volume need to be added to maintain the solid content in the mud. If after reach the 6,950 ft depth, the drilling operation continue for another 7 hours with the same rate, what will be the impact to the mud system.