- Title : Advanced Blowout & Well Control by Robert D, Grace
With Contributions By Bob Cudd, Richard S, Carden, and Jerald L. Shursen - Publish : Gulf Publishing Company Houston, Texas
- Type Document : pdf
- Release : December 1994
- Total Page : 414 Page
- Size : 11.11 Mb
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Decrypted Contents
This excerpt is from an actual drilling report. Well control problems are difficult without mechanical problems. With mechanical problems such as those described in this report, an otherwise routine well control problem escalates into a disastrous blowout. It is common that, in areas where kicks are infrequent, contractors and operators become complacent with poorly designed auxiliary systems. Consequently, when well control problems do occur, the support systems are inadequate, mechanical problems compound the situation, and a disaster follows.
Because this dissertation is presented as an Advanced Blowout and Well Control Operations Manual, it is not its purpose to present the routine discussion of blowout preventers and testing procedures. Rather, it is intended to discuss the aspects of the role of equipment in well control, which commonly contribute to the compounding of the problems. The components of the well control system and the more often encountered problems are discussed.
THE STACK
Interestingly, the industry doesn’t experience many failures within the blowout preventer stack itself. There was one instance in Wyoming where a blowout preventer failed because of a casting problem. In another case, the 5000 psi annular failed at 7800 psi. In general, the stack components are very good and very reliable.
Interestingly, the industry doesn’t experience many failures within the blowout preventer stack itself. There was one instance in Wyoming where a blowout preventer failed because of a casting problem. In another case, the 5000 psi annular failed at 7800 psi. In general, the stack components are very good and very reliable.
A problem that is continually observed is that the equipment doesn’t function when needed. At a well at Canadian, Texas, the annular preventer had been closed on a blowout, but the accumulator would not maintain pressure. Two men were standing on the rig floor when the accumulator lost pressure and the annular preventer opened unexpectedly. As quick as the annular opened, the floor was engulfed in a fireball. Fortunately, no one was seriously burned. The source of the fire was never determined. The rig had been completely shut down, but the accumulator system should have been in working order.
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