Advanced blowout & well control by Robert D. Grace

By Robert D. Grace

Complex Blowout and good keep watch over covers classical strain keep watch over techniques. moreover, particular occasions are awarded in addition to distinctive technique to investigate possible choices and take on problems.The use of fluid dynamics in good regulate, which the writer pioneered, is given cautious therapy, in addition to many different subject matters reminiscent of aid good operations, underground blowouts, narrow gap drilling difficulties, and designated companies equivalent to fireplace struggling with, capping, and snubbing.Case histories are awarded, analyzed, and discussed.Contents * apparatus in good keep watch over * vintage strain regulate tactics whereas drilling * strain regulate techniques whereas tripping * specific stipulations, difficulties, and systems in good keep an eye on * Fluid dynamics in good keep an eye on * distinct prone in good keep an eye on * aid good layout and operations * The AL-Awda venture: The oil fires of Kuwait

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Too often, field personnel attempt to apply classical well control procedures to non-classical problems. If the U-Tube Model does not accurately describe the system, classical pressure control procedures cannot be relied upon. 3, the left side of the U-Tube represents the drillpipe while the right side of the U-Tube represents the annulus. Therefore, the U-Tube Model describes a system where the bit is on ClassicPressure Control Procedures 43 bottom and it is possible to circulate from bottom. If it is not possible to circulate from bottom, classical well control concepts are meaningless and not applicable.

If a production choke is used in a manifold system, it is recommended that the system be spaced in order that an additional drilling choke can readily fit. Even with this precaution, there remains the problem of testing newly installed equipment with the well control operation in progress. In the late 1950s a company known as Drilling Well Control was active controlling kicks with a series of skid-mounted separators. Prior to this technology, it was not possible to hold pressure on the annulus to control the well.

Whether the annular preventer or the pipe rams are closed first is a matter of choice. The closing time for each blowout preventer must be considered along with the productivity of the formation being penetrated. The objective of the shut-in procedure is to limit the size of the kick. If the annular requires twice as much time to close as the pipe rams and the formation is prolific, the pipe rams may be the better choice. If both blowout preventers close in approximately the same time, the annular is the better choice since it will close on anythmg.

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