Jugopetrol AD Kotor, based in Kotor, Montenegro.

Joule Thomson. The Joule Thomson effect (also known as the Joule-Kelvin effect) is the change in temperature that occurs when a gas expands from a high pressure area to a low pressure area, such as across a valve. In the case of a hydrocarbon gas, a significant temperature drop can be experienced.

A geophone. A jug hustler id the member of a land seismic survey crew who places and retrieved geophones.
OR
Artificially made cavern storage in a salt rock formation.

Any small unwanted object “lost” down a well. Junk may be a lost bit, milled pieces of pipe, wrenches or any relatively small object that must be fished out off he hole.

Joint Venture is an entity formed between two or more parties to undertake economic activity together. The parties agree to create a new entity by both contributing equity, and they then share in the revenues, expenses, and control of the enterprise.