Question

Uncu. wer: 2.5 18. --ft trip tank che trip tank ver: 3.6fi. e of calcium cion is made. hud to form ed by a gas mping 4,500 2,500 ft of 5- drill collars is a double- ($35.80/ft and $63.80/1). 1.20 Pipe being recovered from an interval of borehole has a value of $30/ft. On the average, 20 hours of rig time must be expended to recover 200 ft of pipe. The cost per foot to sidetrack the well and redrill the junked interval of borehole would be about $150/ft. Do the fishing operations appear profitable if the average operating cost is $500/hr and the cost of abandoning the junked hole would be approximately $S/ft? Answer: fishing is the best alternative ($50/ft).

what is the answer

Answer 1

The cost of fishing here would include the cost per time multiplied by time to recover the pipe.

On the other hand, sidetracking costs will include the basic cost of sidetrack and redrill along with cost to abandon the junk hole.

Cost of Fishing = Cost per Rig time + Recovery time per feet = $ 500/hr   * 20hr/200ft = $ 50/ ft

Sidetracking cost = Cost to sidetrack and redrill per foot + abandonment cost = 150+ 5 = $ 155

Hence, Fishing is the best alternative as it has the lower cost of both alternatives

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