Definitions of Various Offshore Drilling Rig Types and Generations

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Many people ask us about the definitions of the various generations of offshore drilling rigs.The details below consist of definition of offshore rig types and meaning of rig generations. This will help you get more understanding so when you hear about this drillship is 5th generation rig and you will know right away what it means.

offshore rig definition

Jackup

jackup

Jackups are mobile, self-elevating drilling platforms that are equipped with moveable legs. Jackups are towed to a drilling site by tug boats before the unit lowers its legs to the seabed and then jacks up the hull to elevate it above the sea level, after which drilling operations can begin. The units are used exclusively for shallow water exploration and production drilling.

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Kick Penetration For Stripping Operation

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Kick penetration is one of the most critical concerns for stripping operation because a kick height will change due to change of hole geometry. In this this article, we will describe about this situation.

35-Kick-Penetration-in-Non-Migrate-Kick

This is will be happened when the string penetrates the kick.Height of influx will increase when the drillstring penetrates a kick; therefore, hydrostatic pressure decreases and casing pressure increases in order to compensate this situation.

If the casing is maintained constant while penetrating the kick, you will have high chance to take more influx because of underbalance situation (Figure 1). This article will teach you about how to determine pressure increment while penetrating into the kick, what to look for, etc. Continue reading →

Offshore Deepwater Drilling and Completion in 5 Minutes

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This is excellent oilfield footage about the overall process of offshore deepwater drilling and completion. It has about 5 minutes with good animation that will give you clearer picture of how the deepwater operation works from the beginning.

We also add VDO transcription for anybody who cannot catch all the content of the VDO. Continue reading →

Shallow Gas Hazard in Well Control – Sedco 700 Shallow Gas Incident

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Shallow gas is one of the most dangerous incidents in well control because you don’t have the BOP set to be able to control the well. Additionally, shallow gas always happens at the shallow depth as surface hole section where you will have a difficulty to control the well. This footage below show you how serious of the shallow gas in an offshore environment.

Sedco 700 Shallow Gas Blow Out 6 June 2009

Additional details about shallow hazards that you need to know.

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