1.   The last of the oil fires in Kuwait, which had been started when retreating Iraqi forces ignited well heads, has been capped.

2.   By the following summer, only a well head is visible, bottom.

3.   They typically burn it off at the well head or reinject it into the ground.

4.   The early-morning accident was caused by the detonation of explosives at the well head, the Diarios y Noticias news agency reported.

5.   He said the cause of the explosion was still under investigation but added it appeared the foreign workers were working at the well head at the time.

6.   The party simply intends to tighten safety on board rigs and cut pollution around well heads.