Devadatta Buddha teaches that in a past life, Devadatta was his holy teacher who set him on the path, and makes a noteworthy statement about how even Devadatta will in time become a Buddha: In the Mahāmeghasūtra Devadatta is called a mahāpuruṣa (great being). In the Mahayana Buddhist text, the "Amitāyurdhyāna Sūtra", Devadatta is said to have convinced Prince Ajātasattu to murder his father King Bimbisāra and ascend the throne. Ajātasattu follows the advice, and this action (another "anantarika-kamma" for killing one's own father) prevents him from attaining stream-entry at a later time, when listening to some teaching of the Buddha.
Well kill limited by the burst-pressure capabilities of the tubing or casing, and can risk damaging the reservoir by forcing undesired materials into it. The principal advantage is that it can be done with little advanced planning. This is similar to reverse circulation, except the kill fluid is pumped into the production tubing and circulated out through the annulus. Though effective, it is not as desirable since it is preferred that the well bore fluids be displaced out to production, rather than the annulus. This is the most time consuming form of well kill. It involves repeatedly pumping in small quantities of