Oil well - Yusei

Japanese: 油井 - ゆせい
Oil well - Yusei

A well drilled to extract oil. The world's first oil well was drilled in Pennsylvania, USA, in 1859 by Drake. The oil reservoirs developed have become deeper, and now oil wells are being dug to depths of over 5,000 meters. Once the drilling of the well is complete, a casing is inserted and a cementing process is carried out to pressurize the well with cement around the casing. This is to prevent water from the water layer above the oil reservoir from flowing into the oil well or oil reservoir. In particular, if water from the water layer flows into the oil reservoir, the oil outflow surface will be blocked, shortening the life of the oil well. The oil flows out to the surface through the tubing. A bean is attached to the top end of the tubing to adjust the amount of oil produced.

[Shozo Tanaka]

Oil Well Equipment
The packer is a blocking device installed between the tubing and the casing, which allows the oil in the casing to flow into the tubing .

Oil Well Equipment


Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

油を採収するため掘削された坑井をいう。世界最初の油井はドレークにより1859年、アメリカのペンシルベニア州で掘削された。開発される油層深度が深くなり、現在は深度5000メートル以上の油井も掘られている。坑井の掘削が終了すると、ケーシングを挿入し、セメンチング作業とよばれる作業でセメント液を坑井に圧入して、ケーシングの周りをセメントで固める。これは、油層より上部にある水層の水が、油井や油層に流入するのを防ぐためである。ことに水層からの水が油層へ流入すると、油の流出面がふさがれて、油井の寿命は短くなる。油はチュービングを通って地表へ流出する。チュービング上端にはビーンが取り付けられ、産油量を調整する。

[田中正三]

油井の設備
パッカーは、チュービングとケーシングとの間に設けられる閉塞{へいそく}装置で、ケーシング内の油をチュービングへ流入させる©Shogakukan">

油井の設備


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